CN101003976A - Test method of pile skew simulation of straight pile - Google Patents
Test method of pile skew simulation of straight pile Download PDFInfo
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- CN101003976A CN101003976A CN 200610037122 CN200610037122A CN101003976A CN 101003976 A CN101003976 A CN 101003976A CN 200610037122 CN200610037122 CN 200610037122 CN 200610037122 A CN200610037122 A CN 200610037122A CN 101003976 A CN101003976 A CN 101003976A
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Abstract
The present invention relates to a pile oblique simulation straight pile detection method. Said method includes the following steps: setting oblique plane with different perpendicularity deviation on the top surface of pretreated pile head, mounting sensor on the oblique plane, using nylon vertical hammer or nylon hand hammer to strike pile head of foundation pile to give out a vibration signal to said foundation pile and transfer said vibration signal received by sensor to a special-purpose foundation pile detection instrument; according to the temporal curve and amplitude spectrum obtained by processing data finding out temporal curve and amplitude spectrum related to the characteristics of straight pile, the antidipping direction of pile top surface oblique plane and its perpendicularity deviation or the dipping direction of pile side oblique plane and its perpendicularity deviation which are correspondent to the temporal curve and amplitude spectrum are the dipping direction and perpendicularity deviation of the detected foundation pile.
Description
Technical field
The present invention relates to the foundation pile detection range of civil engineering infrastructure, is a kind of test method of pile skew simulation of straight pile.
Background technology
Along with growing continuously and fast of national economy, a large amount of constructions of various facilities such as urban skyscraper, municipal administration, traffic, the energy, water conservancy, the important foundation form that pile foundation has become engineering structures and adopted.Pile foundation is underground concealed works, also is the important component part of building, and the quality of pile quality is directly connected to the safety of building.
Yet, in a large amount of foundation pile construction processes, especially in limestone area, soft clay area, locations such as the harbour of geological conditions complexity, harbour, bridge, dykes and dams, foundation ditch, because the existence of ground solution cavity, soft soil layer, boulder stratum easily squeeze property and all earth lateral pressure inequalities of stake, it is improper etc. that the board of in addition holing is difficult to maintenance level or construction technology, all can cause designing vertical engineering piles and tilt phenomenon occur.Country's " building foundation engineering construction quality standards of acceptance " stipulates that (GB50202-2002) foundation pile verticality allowable variation must not surpass 1%.For hand excavated pile or bored pile, conventional detection is just controlled its verticality in the foundation pile construction process and is observed, and then can't check the verticality of pile body behind the pile.But design vertical engineering piles, the base-pile tilt phenomenon is an objective reality behind the pile, and the potential safety hazard that stake tiltedly causes also can not be ignored; And the engineering piles that is designed to tilt, because the engineering construction difficulty is big, the gradient requirement that does not reach design behind the pile also is a common occurrence, causes the vertical bearing capacity and the horizontal shear resistance of stake to reduce greatly, has stayed serious potential safety hazard to construction project.It is the main method of pile verticality behind the inspection pile that on-the-spot at present management and probing are loosed core, but checking wastes time and energy, the testing cost height, generally can only spot-check minority stake behind the pile, representativeness is very low, there is above-mentioned shortcoming equally in additive method, and operational processes is extremely complicated, is not easy to extensive popularization.
Summary of the invention
The objective of the invention is problem at existence in the above-mentioned foundation pile detection, the judgement that a kind of base-pile tilt is provided and the tool scientific basis of handling base-pile tilt and effectively and efficiently, the harmless foundation pile detection method of energy vast scale sampling observation pile body inclining, test method of pile skew simulation of straight pile.
Test method of pile skew simulation of straight pile of the present invention is achieved in that a kind of test method of pile skew simulation of straight pile, the tapered plane of different vertical degree deviation is set on pile crown, sensor installation on the tapered plane, hit the foundation pile pile crown by external force and give the foundation pile accumulation signal, and import the vibration signal that sensor receives into record and signal processing means processes.
Described pile crown is the level of state the pile crown end face through anticipating, and the stake side of basseting is vertical with the level ground.Pile crown must be cut a hole laitance, loose or damaged portion, and excision hinders the pile crown exposed steel bar of proper testing, makes the pile crown 15-20cm that bassets, a pile crown and all native spacing 60 〉=cm of stake; Clean up the pile crown of destroying laitance with clear water then, add 3/1000ths to 5/1000ths accelerating admixtures with the above high-intensity cement mortar of C30 level is smeared in the pile crown strictness, basseting in the stake side, part is necessary to keep vertical; Stake top quality of concrete and cross-sectional sizes should be identical with former stake.
Described tapered plane can be the size according to engineering piles design dip deviation, the module that is made into different vertical degree deviation in advance be installed on the top horizontal plane by different orientation or the stake side on.
Described module is that the outside or inside dual mode in inclined-plane in inclined-plane is installed on the top horizontal plane, and the module base should strict level, be installed in the pile crown side module base should with stake side keeping parallelism.
Described tapered plane is disposable in pile crown pouring moulding, on 8 symmetry equivalent directions that with the foundation pile center are symmetric points according to the size of engineering piles design dip deviation respectively be arranged to 3 wide serve as the inclined-plane of the different perpendicularity deviation of stake diameter 1/8th, the plane that stake is pushed up is a horizontal plane.
Described tapered plane can be to adopt cement mortar or gypsum ash directly to build out by different perpendicularity deviations at stake end face or place, pile crown side.
Parallel or the vertical reference axis direction of described direction of excitation is at vertical exciting of stake face near point or the horizontal exciting of stake side near point; Receive mode: a bit receive closely vertical exciting, the distance≤5cm of exciting point and test point; Mode that a plurality of directions of the vertical exciting of central point receive and the mode that adopts the horizontal cross exciting.
Described sensor is bonded on the tapered plane, and the axis strictness of sensor and tapered plane keep vertical and cement; Parameters such as the sampling time interval that is adopted in the detection, gain, sampling number, analog filtering, triggering mode should determine that for same stake, selected above-mentioned parameters should be the same by field trial.
The detection signal of described sensor acquisition is made superposed average and is handled, and the signal number of participating in average treatment should not be less than 5; When signal is more weak at the bottom of the stake, can adopt index to amplify and handle, but should control enlargement range, the stake end signal amplitude that is exaggerated should not require the waveform afterbody to make zero substantially greater than the incidence wave amplitude simultaneously.
Described detection signal obtains shear wave time-history curves figure and compressional wave time-history curves figure and amplitude spectrogram after handling, therefrom find out the measured curve figure consistent, the countertendency direction of the stake end face tapered plane of its correspondence and the tendency direction of the tapered plane of perpendicularity deviation or stake side and incline direction and the perpendicularity deviation that perpendicularity deviation is this thereof with the plumb pile curvilinear characteristic.
Test method of pile skew simulation of straight pile of the present invention is simple to operate, does not damage the foundation pile of surveying, and saves time and laborsaving, can accomplish each foundation pile compared intuitively and detect, and representativeness is very high, has guaranteed building safety, has very high practicality.
Description of drawings
Fig. 1 is the module combinations test philosophy figure of test method of pile skew simulation of straight pile of the present invention;
Fig. 2 is the disposable pouring test philosophy of the pile crown figure of test method of pile skew simulation of straight pile of the present invention;
Fig. 3 is the checkout gear schematic diagram of test method of pile skew simulation of straight pile of the present invention;
Fig. 4 handles schematic diagram for the pile crown of test method of pile skew simulation of straight pile of the present invention.
Fig. 5 is the test module schematic diagram 1 of test method of pile skew simulation of straight pile of the present invention;
Fig. 6 is the test module schematic diagram 2 of test method of pile skew simulation of straight pile of the present invention;
Fig. 7 is the module mounting plane schematic diagram of test method of pile skew simulation of straight pile of the present invention;
Fig. 8 is the stake side installed module schematic diagram of test method of pile skew simulation of straight pile of the present invention;
Fig. 9 is the measuring point layout schematic diagram of test method of pile skew simulation of straight pile of the present invention;
Figure 10 is the disposable pouring mould of the pile crown schematic diagram of test method of pile skew simulation of straight pile of the present invention;
Figure 11 is the disposable pouring floor map of pile crown of test method of pile skew simulation of straight pile of the present invention;
Figure 12 handles the back generalized section for the disposable pouring of the pile crown of test method of pile skew simulation of straight pile of the present invention;
Figure 13 is the plumb pile actual measurement compressional wave time-history curves figure of test method of pile skew simulation of straight pile of the present invention;
Figure 14 is the plumb pile actual measurement shear wave time-history curves figure of test method of pile skew simulation of straight pile of the present invention;
Figure 15 tiltedly surveys compressional wave time-history curves figure for the stake of test method of pile skew simulation of straight pile of the present invention;
Figure 16 tiltedly surveys shear wave time-history curves figure for the stake of test method of pile skew simulation of straight pile of the present invention;
Figure 17 is 0 °～3.43 ° module list for test method of pile skew simulation of straight pile medium dip angle of the present invention;
Figure 18 is 4 °～45 ° module list for test method of pile skew simulation of straight pile medium dip angle of the present invention.
Wherein, the P among Fig. 1
o, P
i, P
jBe measuring point numbering, F
i, F
j, F
oBe vertical exciting, F
1j, F
1iBe horizontal exciting, 1 pile body, 2 modules, 3 sensors, 4 detection faces extension lines, the serious taper pile axis of 5 simulations, 6 simulation taper pile axis, 7 simulation plumb pile axis; Among Fig. 2, F
1～～F
7Be vertical exciting, F
1i, F
1jBe horizontal exciting, I～～VII is the detection faces extension line; Among Fig. 4,9 vertical planes, 10 working pits, 11 pile crowns, 12 horizontal planes; Among Fig. 5,8 module tapered planes; Among Fig. 7,13 modules numbering; Among Fig. 8, P
i, P
jBe sensor mounting points position and measuring point numbering, F
I1, F
J1, F
I2, F
J2Be vertical exciting, F
1i1, F
1j1, F
1i2, F
1j2Be horizontal exciting, 14 simulation plumb pile axis, 15 simulation stakes are tilted to the right, and 16 simulation stakes are tilted to the left; Among Fig. 9,17 point positions and numbering, 18F
1～～F
8Vertical exciting; Among Figure 12,19 is former pile body.
Concrete form of implementation
Below in conjunction with drawings and Examples test method of pile skew simulation of straight pile of the present invention is further described.
The test philosophy of test method of pile skew simulation of straight pile of the present invention is:
As Fig. 1, Fig. 2 and shown in Figure 8, stake is tilted for detection faces (horizontal plane).Still can be prior prefabricated different tendencies, the module of different vertical degree deviation, mould or adopt cement mortar or gypsum ash etc. directly on the stake end face or place, pile crown side, produce the tapered plane of different vertical degree deviation, make the detection faces and pile center's axis normal or parallel of certain tapered plane after the combination.That is by the tapered plane simulation tests of organizing different vertical degree deviations more, seek out one group with identical time-history curves and the amplitude spectrogram of straight stake feature, the tendency direction and the perpendicularity deviation thereof of the countertendency direction of the stake top tapered plane of its correspondence and perpendicularity deviation thereof or stake side tapered plane are this incline direction and perpendicularity deviation.
The detection method step:
The first step: pile crown is prepared
As Fig. 4, cutter removes the laitance of pile crown, loose or damaged portion, and excision hinders the pile crown exposed steel bar of proper testing, makes pile crown 11 15-20cm that bassets, working pit spacing 〉=60cm between pile crown and all soil; Clean up the pile crown of destroying laitance with clear water, it is floating with the pile crown strictness to add 3/1000ths to 5/1000ths accelerating admixtures with the above high-intensity cement mortar of C30, in order to guarantee stake top 12 levels, must use the level on 12 on spirit level close inspection stake top; Part is basseted in stake side 9 must be vertical with the horizontal plane maintenance, also must use the spirit level close inspection, guarantees a stake lateral vertical.The concrete structure in stake top, intensity etc. should be identical with former stake, and cross-sectional sizes is identical with former stake, should be the center with the reinforcing cage in the time of relatively.Water the mode of cement mortar again and make in order to guarantee the identical of a top section and former stake, can adopt to make earlier round template.
Second step: the making of tapered plane
The pile crown tapered plane is according to the size of engineering piles design dip deviation, makes on pile crown in advance, and its preparation method can have three kinds substantially:
1, agent approach:
According to the size of engineering piles design dip deviation, make the test module of a collection of different vertical degree deviation in advance.Module making requires as follows: 1, required precision height, and its relative error≤1%, tapered plane 8 surfaces are smooth; 2, mark H (mm) value is answered in the module side; The module making material adopts the indeformable light-duty alloy of hard for well, to reduce the error of measuring.Module size and perpendicularity deviation design load are seen Figure 17, Figure 18 and Fig. 5, Fig. 6.0 °～3.43 ° at the angle of slope of Figure 17, corresponding perpendicularity deviation 0～6%, its corresponding module is shown in Figure 5, the long 120mm of module, wide 70mm, high 10mm, the long 100mm of tapered plane projection, wide 50mm; The angle of slope of Figure 18 is 4 °～45 °, and corresponding perpendicularity deviation is 6.99%～100%, and its corresponding module is shown in Figure 6, the long 70mm of module, wide 70mm, high 10mm, the long 50mm of tapered plane projection, wide 50mm.
The installation of module such as Fig. 1, Fig. 7, shown in Figure 8, wherein, F is an exciting, P is the measuring point numbering.On the stake top horizontal plane after the processing, module 2 is installed on the pile crown by different one or more orientation, all compile upper module numbering 13 for each module, so that data are handled and are searched, the arrangement of module 2 can be to be reference point with the pile crown center, even, equidistant eight the different positions of pile crown end face that are distributed in; For the ease of a direction of judging that stake is oblique, the outside or inside dual mode in inclined-plane in module 2 inclined-planes and all should being provided with by pile center's point by the inclined-plane central axis.In order to reduce measure error as much as possible, the module base is answered strict level, must check with spirit level during installation.When module 2 is installed on the pile crown side by one or more different orientation, module 2 bases should with the strict keeping parallelism in stake side.All modules 2 cement when installing in strictness, in order to avoid influence the reception of sensor signal, avoid shaking when exciting and take off.The couplant that module is installed can adopt 502 glue, butter, toothpaste, plasticine, gypsum etc.
2, directly build the tapered plane method
This method is on the pile crown after anticipating, according to the size of engineering piles design dip deviation, with the test tapered plane of making different vertical degree deviations such as cement mortar.The above high-intensity cement mortar of the most handy C30 of cement mortar is added 3/1000ths to 5/1000ths accelerating admixtures, and is approaching to guarantee concrete structural strength grade and former stake.The making of tapered plane should detect perpendicularity deviation, reduces error as far as possible.
3, the disposable pouring method of forming
This method is relative agent approach and directly builds the tapered plane method at pile crown.As Figure 10, Figure 11, shown in Figure 12, at first, according to the engineering actual conditions, design 9 direction different vertical degree deviations that comprise a top horizontal plane, and by its design deviation size in advance processing and fabricating go out a mould, mold materials can adopt materials such as lightweight hard alloy.Mould diameter generally should be consistent with the engineering piles diameter, and each tapered plane vertical missing can be decided according to the actual property of engineering condition, and each is to should symmetry equating that wherein Δ X is 1/8th of a stake diameter, and the brim height of mould is that 5cm is advisable.
The mounting means that mould is installed is as follows: (1) is placed in die frame on the pile crown, and carries out each to the levelness verification with spirit level on the stake end face of handling well; (2) use high-grade cement mortar, water out the little tapered plane of different tendencies by pre-designed mould top tapered plane; (3) treat the cement mortar initial set before, mould is taken out gently, should guarantee in the process that each tapered plane is indeformable, in order to avoid influence testing result; (4) with cement paste the original mould seam is filled up and smears; (5) treat just can test after 5-7 days and stake gradient deduction explanation.Pouring pile crown such as Figure 12 after the moulding, pile crown top levels 12 is strict levels, the about 5cm of unfertile land side's thickness of pile crown pouring moulding, the perpendicularity deviation ξ of tapered plane wherein
1＜ξ
2＜ξ
3
The 3rd step: the installation of sensor
As Fig. 1, shown in Figure 8, sensor 3 is installed on each tapered plane, and strict vertical with the maintenance of module tapered plane.For fear of distorted signals, too a little less than, sensor answers strictness to cement.Used couplant can be 502 glue, butter, toothpaste, plasticine, gypsum etc.Sensor can adopt accelerometer or high damping speedometer.
The 4th step: detect
As Fig. 1, Fig. 2, Fig. 8, shown in Figure 9, lay module 2 and sensor 3 at stake end face upper edge different directions, can adopt and a bit receive closely vertical exciting, exciting point and test point≤5cm also can adopt the compressional wave observation system of a plurality of directions receptions of the vertical exciting of central point and the shear wave observation system of employing horizontal cross exciting.When observing at the scene, direction of excitation is answered parallel or vertical reference axis direction, and exciting can adopt one or more directions to receive at vertical exciting of stake face near point or the horizontal exciting of stake side near point, and exciting should be simply agile.The parameters that is adopted in the detection (sampling time interval, gain, sampling number, analog filtering, triggering mode etc.) should be determined by field trial, for same pile, selected parameters (sampling time interval, gain, sampling number, analog filtering, triggering mode etc.) should be the same.During detection, should guarantee the acquired signal quality, guarantee the uniformity of signal, the zero phenomenon of wafing of undistorted and nothing.The signal exciting device generally can adopt perpendicular hammer of nylon king or nylon king hand hammer.
The 5th step: data is handled
Adopt special-purpose foundation pile detector record, handle the signal that collects.During processing, generally tackle detection signal and do the superposed average processing, the signal number of participating in average treatment should not be less than 5.When signal is more weak at the bottom of the stake, can adopt index to amplify and handle, but should control enlargement range, the stake end signal amplitude that is exaggerated should not require the waveform afterbody to make zero substantially greater than the incidence wave amplitude simultaneously.Same pile, each measuring point field condition should be consistent with parameter with indoor treatment of selected, so that carry out contrast mutually between curve.The map that data is handled back one-tenth figure is: " the amplitude spectrogram is as Figure 13～Figure 16 for time-domain " time-history curves " and frequency domain.
The 6th step: data analysis
The map that the signal of being gathered forms after treatment has following feature:
1, plumb pile actual measurement time-history curves feature: (1) compressional wave time-history curves feature: as Figure 13, before arriving to the pile bottom reflection ripple behind the direct wave in the time period, little and variability is seldom to anti-phase low frequency wave amplitude for each; When pile quality is intact, when there was the wave impedance interface in stake in an end, each was obvious and variability is few to pile bottom reflection.(2) shear wave time-history curves feature: as Figure 14, each is very little and variability is few to anti-phase low frequency wave amplitude in the time period before arriving to the pile bottom reflection ripple behind the direct wave; Each exists but not obvious to pile bottom reflection.
2, tiltedly survey the time-history curves feature: (1) compressional wave time-history curves feature: as Figure 15, pile No. 6-1 is tendency side exciting and reception compressional wave measured curve among the figure, and pile No. 6-5 is countertendency side exciting and receives the compressional wave measured curve among the figure.Before time-history curves arrives to the pile bottom reflection ripple behind direct wave in the time period, the roomy anti-phase low frequency wave that superposeed, and each is very big to variability; The tendency side swashs stake and receives, and the anti-phase low frequency wave amplitude in its top is big and the anti-phase low frequency wave amplitude of postmedian is little behind the direct wave, is significantly " del " abnormal curve feature.And countertendency side exciting and reception, then the anti-phase low frequency wave amplitude in middle part obviously increases, and the anti-phase low frequency wave amplitude in top obviously reduces; Each is not obvious to pile bottom reflection.(2) shear wave time-history curves feature: as Figure 16, pile No. 11-1 figure is tendency side exciting and reception shear wave measured curve among the figure, and pile No. 11-5 is countertendency side exciting and reception shear wave measured curve among the figure.In tendency side exciting and reception, its time-history curves is right after and roomy anti-phase low frequency wave occurs behind direct wave, and in, the anti-phase low frequency wave amplitude in rear portion is little; And the anti-phase low frequency wave amplitude in upper and lower part is little in that its anti-phase low frequency wave amplitude in time-history curves middle part of countertendency side exciting and reception is big, is obviously " V " type curvilinear characteristic; Each is not obvious to pile bottom reflection.
According to above curve map feature, resulting all curve maps are analyzed, therefrom find out plumb pile actual measurement time-history curves characteristic pattern, the perpendicularity deviation of its corresponding tapered plane is this oblique perpendicularity deviation.The anti-obliquity direction of corresponding stake top tapered plane is this incline direction, corresponding to the tendency direction of the tapered plane of stake side and incline direction and the perpendicularity deviation that perpendicularity deviation is this thereof.
Claims (10)
1, a kind of test method of pile skew simulation of straight pile, it is characterized in that: the tapered plane that different vertical degree deviation is set on pile crown, sensor is set on the tapered plane, hit the foundation pile pile crown by external force and give the foundation pile accumulation signal, and import the vibration signal that sensor receives into record and signal processing apparatus is handled.
2, test method of pile skew simulation of straight pile as claimed in claim 1 is characterized in that: pile crown makes pile crown top planar horizontal through anticipating, and makes the stake lateral vertical of basseting in horizontal plane.
3, test method of pile skew simulation of straight pile as claimed in claim 2 is characterized in that: tapered plane is the size according to engineering piles design dip deviation, the module that is made into different vertical degree deviation in advance be installed on the top horizontal plane or the stake side on.
4, test method of pile skew simulation of straight pile as claimed in claim 3 is characterized in that: the module that is installed in a top horizontal plane adopts the outside or inside dual mode in inclined-plane in inclined-plane, and the base of module is a level; The base that is installed in the module of pile crown side is parastate with the stake side.
5, test method of pile skew simulation of straight pile as claimed in claim 2, it is characterized in that: tapered plane is disposable in pile crown pouring moulding, on 8 symmetry equivalent directions that with the foundation pile center are symmetric points according to the size of engineering piles design dip deviation respectively be arranged to 3 wide serve as the inclined-plane of 1/8th different perpendicularity deviation of stake diameter, an end face is a horizontal plane.
6, test method of pile skew simulation of straight pile as claimed in claim 2 is characterized in that: tapered plane is to adopt cement mortar or gypsum ash directly to build out by different perpendicularity deviations at stake end face or place, pile crown side.
7, as claim 4,5 or 6 described test method of pile skew simulation of straight pile, it is characterized in that: the parallel or vertical reference axis direction of direction of excitation, at vertical exciting of stake face near point or the horizontal exciting of stake side near point; Receive mode: a bit receive closely vertical exciting, the distance≤5cm of exciting point and test point; Mode that a plurality of directions of the vertical exciting of central point receive and the mode that adopts the horizontal cross exciting.
8, test method of pile skew simulation of straight pile as claimed in claim 7 is characterized in that: sensor is bonded on the tapered plane, and the axis normal of sensor is in tapered plane; Parameters such as the sampling time interval that is adopted in the detection, gain, sampling number, analog filtering, triggering mode should determine that for same stake, selected above-mentioned parameters should be the same by field trial.
9, test method of pile skew simulation of straight pile as claimed in claim 8 is characterized in that: the detection signal of each inclined-plane sensor acquisition is made adjacent superposed average and is handled, and the signal number of participating in average treatment is no less than 5; Stake is adopted index to amplify and is handled when signal is more weak at the end.
10, test method of pile skew simulation of straight pile as claimed in claim 9, it is characterized in that: in the compressional wave time-history curves of gathering gained after treatment and shear wave time-history curves and spectrogram, find out and the consistent measured curve figure of plumb pile time-history curves figure feature the countertendency direction of the stake end face tapered plane of its correspondence and the tendency direction of the tapered plane of perpendicularity deviation or stake side and incline direction and the perpendicularity deviation that perpendicularity deviation is this thereof.
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| CNB2006100371223A CN100451543C (en) | 2006-08-22 | 2006-08-22 | Test method of pile skew simulation of straight pile |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520372B (en) * | 2008-02-28 | 2010-10-13 | 深圳华映显示科技有限公司 | Testing device and testing method thereof |
| CN102425192A (en) * | 2011-09-22 | 2012-04-25 | 深圳思量微系统有限公司 | Pile foundation inclination real-time monitoring and prewarning system |
| CN103256920A (en) * | 2012-02-15 | 2013-08-21 | 天宝导航有限公司 | Determining tilt angle and tilt direction using image processing |
| CN103791864A (en) * | 2012-10-30 | 2014-05-14 | 中国石油天然气股份有限公司 | Sucker rod length measuring instrument |
| CN102877491B (en) * | 2012-10-25 | 2015-06-24 | 中国建筑第二工程局有限公司 | Simple hole verifier and application method thereof |
| US9683832B2 (en) | 2005-12-15 | 2017-06-20 | Trimble Inc. | Method and apparatus for image-based positioning |
| CN113835122A (en) * | 2021-09-30 | 2021-12-24 | 中铁二十四局集团有限公司 | Method for determining pile side position by using pile side hole reflection wave method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62115316A (en) * | 1985-11-14 | 1987-05-27 | Penta Ocean Constr Co Ltd | Tip position detecting method for steel pipe pile |
| JP2926140B2 (en) * | 1994-10-12 | 1999-07-28 | 日本航空電子工業株式会社 | Tilt angle measuring device |
| KR20040052961A (en) * | 2004-05-20 | 2004-06-23 | 김승 | The non-destruction test method for the spot of pipe, and the program of the read to record vehicle by the computer |
| CN100494888C (en) * | 2005-09-28 | 2009-06-03 | 广东省工程勘察院 | Base-pile tilt nondestructive detecting method |
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2006
- 2006-08-22 CN CNB2006100371223A patent/CN100451543C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9683832B2 (en) | 2005-12-15 | 2017-06-20 | Trimble Inc. | Method and apparatus for image-based positioning |
| CN101520372B (en) * | 2008-02-28 | 2010-10-13 | 深圳华映显示科技有限公司 | Testing device and testing method thereof |
| CN102425192A (en) * | 2011-09-22 | 2012-04-25 | 深圳思量微系统有限公司 | Pile foundation inclination real-time monitoring and prewarning system |
| CN103256920A (en) * | 2012-02-15 | 2013-08-21 | 天宝导航有限公司 | Determining tilt angle and tilt direction using image processing |
| CN102877491B (en) * | 2012-10-25 | 2015-06-24 | 中国建筑第二工程局有限公司 | Simple hole verifier and application method thereof |
| CN103791864A (en) * | 2012-10-30 | 2014-05-14 | 中国石油天然气股份有限公司 | Sucker rod length measuring instrument |
| CN113835122A (en) * | 2021-09-30 | 2021-12-24 | 中铁二十四局集团有限公司 | Method for determining pile side position by using pile side hole reflection wave method |
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|---|---|
| CN100451543C (en) | 2009-01-14 |
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