CN102787602A - Curtain grouting technique - Google Patents
Curtain grouting technique Download PDFInfo
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- CN102787602A CN102787602A CN2012103169633A CN201210316963A CN102787602A CN 102787602 A CN102787602 A CN 102787602A CN 2012103169633 A CN2012103169633 A CN 2012103169633A CN 201210316963 A CN201210316963 A CN 201210316963A CN 102787602 A CN102787602 A CN 102787602A
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Abstract
The invention discloses a curtain grouting technique. A preset steel pipe grouting technique comprising the following steps of drilling, mounting a steel pipe, blocking by die bags and grouting is used. According to the invention, pore-wall filler is replaced by the die bags, the disadvantages that the pre-embedded steel pipe grouting technique is likely to be affected by the construction environment, the hydrogeological condition and the like are overcome and/or reduced; the technique has the following characteristics of high efficiency, wide application scope and high operability; mortar is grouted section by section conveniently by means of both extra-tube grouting expansion and intra-tube grouting expansion by the die bags; a shroud ring being made of elastic materials and acting like a one-way valve is arranged in a mortar outlet hole in the wall of the steel pipe, the mortar flows out from the inner side under the action of the grouting pressure, and the mortar is unlikely to reflow after the grouting process is finished or stopped; when the intra-pipe grouting expansion operation, the mortar is enabled to firstly grout the expansion die bag automatically under the action of the elastic shroud ring, after the die expansion block is finished, the automatic drilling and sectional grouting are started under the pressure, so that convenient and efficient construction is realized.
Description
Technical field
The invention belongs to technical field of building construction, especially belong to water resources and hydropower construction underpin technical field, particularly a kind of curtain grouting technology of underpin.
Background technology
At present, the technology worker's method that is applicable to covering layer curtain grouting has multiple, comprising that circulation bores filling method, pre-buried floral tube method, beats and manage grouting, sleeve grouting method.
The filling method is bored in circulation: be a kind of grouting method of China's original creation, also claim the filling method while boring.This method is in the alluvium, to hole piecemeal from top to bottom and be in the milk, and each section grouting is all sealed in the aperture.Circulation is bored the filling method and was expanded afterwards in the rock foundation grouting construction, and improves, and develops into the aperture closure grouting method that generally adopts at present.Its characteristics: (1) is suitable for cement injection clay slurry or cement paste in the sand ovum gravel; (2) in the process of boring, also utilize circulating mud to be in the milk in the stratum; (3) because every section grouting all is the sealing in the aperture, each grout compartment can obtain repeatedly irritating again, thereby grouting quality is good; (4) compare with pre-buried floral tube method, can save a large amount of tubing; (5) operation is relatively simple, processing ease.
The shortcoming that the filling method is bored in circulation is: hocket owing to bore the filling operation, so work efficiency is relatively low; Each section grouting is the sealing in the aperture all, thereby the face of land usually emits slurry serious during grouting, has both made when carrying out deep grouting, can not use very high grouting pressure; When covering layer is made up of multiple stratum, when needing the dissimilar slurries of perfusion, be difficult to construction.
Pre-buried floral tube method: also claim sleeving valve floral tube method, sleeve valve floral tube method.It is that the Frenchman at first invents, and is called Suo Liedansi (Soletanche) method.This method is at first to get out grout hole, and in the hole, being lowered to the special grout pipe that has eyelet is floral tube, inserts special " filler " between grout pipe and the hole wall, two packer segmentations is installed in grout pipe then is in the milk.Its characteristics: (1) grout hole one-time continuous has been bored, and grouting and drilling operating separately carry out, and efficiency of construction is high; (2) grouting is carried out in floral tube, does not have the worry in the hole of collapsing, and grout compartment is isolated also than being easier to; (3) can adopt arbitrarily from bottom to top or grouting way from top to bottom, also can irritate any a section in the full hole earlier, or a certain section is repeatedly irritated again, grouting quality is guaranteed; (4) can use big pressure grouting, emit the possibility of slurry, string slurry little in the filling process.According to strata condition and requirement of engineering, can carry out the grouting of penetration property, also can carry out compaction grouting or fracture grouting; (5) compliance to various alluviums is good, can distinguish different alluviums and select different slurries for use.Can adapt to deep covering layer grouting.
Pre-buried floral tube method employed " filler " match ratio must be according to material property, processing method, require concrete conditions such as curing time, execution conditions and hydrogeological conditions, by the test decision.
The major defect of pre-buried floral tube method is to need pre-buried floral tube, and can't reclaim.Requirement of engineering is used a large amount of steel pipes, has strengthened construction costs.Secondly, the construction sequence of pre-buried floral tube method is more, the making of floral tube and divide into, the equal more complicated of technology such as filler, grouting.The single constructing operation that causes of floral tube structure is complicated, does not utilize and improves efficiency of construction and construction quality.
Beat the pipe grouting: be the simplest a kind of well cementing method.It is that steel pipe (grout pipe) is driven in the sand gravel layer, utilizes this steel pipe to be in the milk then.
Sleeve grouting method: be the method that the protection casing when utilizing boring is in the milk.Its construction sequence is: the sleeve pipe retaining wall hole → be lowered to grout pipe → rise pull out sleeve pipe (1～2m) → packer → grouting → recurrence is installed pull out sleeve pipe and grout pipe (1～2m) → installation packer → above-mentioned operation of being in the milk → repeating is poured into to the aperture.Its characteristics: adopt this job practices, boring has been eliminated the worry in the hole of collapsing because the sleeve pipe retaining wall is arranged.Adopt advanced all-hydraulic engineering driller and follow pipe bit to advance, efficient is high, and hole depth can reach about 60m.It should be noted that in filling process slurries upwards flow along sleeve outer wall easily, even the face of land emits slurry; If the grout injection overlong time then may be condensed and lived sleeve pipe admittedly, caused and pulled out difficulty.
Put forward grouting on the uncork: do not use packer, be utilized in the fine sand isolation grout compartment that charges in the hole and be in the milk.Its construction sequence is: the pipe of boring → down or with pipe → flushing → following floral tube → back-up sand, rise carry grout pipe on the sleeve pipe → piecemeal and also be in the milk → until the aperture.
The Hydraulic and Hydro-Power Engineering project is quantitatively more and more in exploitation in recent years; Scale is increasing; Duration is more and more tighter, and construction intensity is increasingly high, can be increasingly high to antiseepage requirement from now on; Existing processes worker's method can not satisfy present construction needs, improves new and effective grouting method and puts that to remedy the industry deficiency be the direction that the industry continues research into production.
Summary of the invention
The present invention discloses a kind of curtain grouting technology according to the deficiency of prior art.The problem that the present invention will solve provides and a kind ofly replaces the hole wall filler with the mould bag, overcomes or reduces the influence that pre-buried floral tube grouting hole wall filler receives execution conditions and hydrogeological conditions etc.; Have efficient, wide, the workable characteristics of applicability; Compliance to various alluviums is good, desirable higher production efficiency and effect in deep covering layer grouting; For earth rock cofferdam seepage speedily carry out rescue work the also desirable good quality and the curtain grouting technology of progress effect.
The present invention realizes through following technical scheme:
Curtain grouting technology adopts preset floral tube grouting process, may further comprise the steps: boring, floral tube is installed, and the mould bag blocks, grouting;
Boring: rig boring, 140 millimeters of diameter phi 91～φ, the boring afterflush is also removed boring mud;
Floral tube is installed: 89 millimeters floral tubes of diameter phi 60～φ are put into along borehole casing, and floral tube lower end distance at the bottom of the hole is not more than 20 centimetres, and 10～20 centimetres above ground level of aperture pulls up sleeve pipe; Said floral tube pipe underseal closes, on the tube wall 33～50 centimetres of axially spaced-aparts have around one group of slurry outlet, 3～4 of every group of slurry outlets circumferentially evenly are provided with at tube wall; 10～15 millimeters in aperture; The external surface of every group of slurry outlet is used the elastomeric material shroud ring, and the elastomeric material lower end has anti-slip ring to fix; The with good grounds grouting segmentation of said floral tube outer wall segment length spacer ring is around the mould bag of colligation;
The mould bag blocks: after the floral tube installation, slip casting bulging die bag makes the mould bag of filling after expanding block the annular gap of floral tube outer wall and drill hole wall, guarantee slurries when being in the milk not along emitting on the hole wall;
Grouting: following packer packer grouting.
Slip casting bulging die bag adopts the outer slip casting of pipe to expand; Behind the slip casting bulging die bag, following packer grouting, segmentation jam perfusion during grouting.
Or slip casting bulging die bag adopts slip casting expansion in the pipe; During slip casting bulging die bag, with packer be arranged on more than the mould bag injected hole, next section floral tube slurry outlet is with upper/lower positions, makes grouting liquid preferentially fill the mould bag.
The elastomeric material preferred rubber skin of said shroud ring slurry outlet external surface.
Said floral tube is connected to form by many segmentation tubing.
The outer slip casting bulging die bag of aforementioned tube is through the grouting channel of special setting the mould bag to be carried out slip casting to expand, and generally can adopt the less pipeline of setting up of diameter to constitute, and the outer Grouting Pipe arrival end of the special pipe that is provided with is arranged at outside the aperture, and the port of export is arranged in the mould bag.
Slip casting bulging die bag is to accomplish through the mould bag injected hole that the floral tube wall is provided with in the aforementioned tube; Mould bag injected hole is arranged in the mould bag around colligation; During slip casting bulging die bag, packer is arranged on that mould bag injected hole is above, next section floral tube slurry outlet is with upper/lower positions, because the effect of elastomeric material shroud ring makes slurries at first pour into the bulging die bag automatically; After treating that completion is blocked in the expansion of mould bag, because of the pressure effect begins to carry out drill-pouring through injected hole automatically.
Helpfulness of the present invention is: the present invention adopts the mould bag to replace the hole wall filler, overcomes, reduces the influence that pre-buried floral tube grouting hole wall filler receives execution conditions and hydrogeological conditions etc.; Have efficient, wide, the workable characteristics of applicability; Compliance to various alluviums is good, desirable higher production efficiency and effect in deep covering layer grouting; For earth rock cofferdam seepage speedily carry out rescue work the also desirable good quality and the curtain grouting technology of progress effect; The mould bag adopts outer slip casting expansion of pipe or the interior slip casting of pipe to expand and all can conveniently the grouting construction segmentation be poured into; At floral tube wall slurry outlet elastomeric material shroud ring such as same one-way cock are set, slurries can flow out from inside to outside under the grouting pressure effect, but after grouting end or the termination; Slurries can not backflow, and in adopting mould bag pipe, during the slip casting expansive working, utilize the effect of elastomeric material shroud ring to make slurries at first pour into the bulging die bag automatically; After treating that completion is blocked in the expansion of mould bag; Because of pressure effect begin automatically to hole segmentation perfusion, easy construction, efficient.
Description of drawings
Fig. 1 is the boring sketch map;
Fig. 2 is the outer slip casting mould bag technology floral tube scheme of installation of pipe;
Fig. 3 is outer slip casting mould bag technology slip casting bulging die bag of pipe and following packer grouting sketch map;
Fig. 4 is section grouting effect and the second section sketch map that is in the milk at the bottom of the outer slip casting mould bag fabrication hole of pipe;
Fig. 5 is second section grouting effect sketch map;
Fig. 6 is the 3rd a section grouting sketch map;
Fig. 7 is a slip casting mould bag technology floral tube scheme of installation in the pipe;
Fig. 8 is a slip casting mould bag technology slip casting bulging die bag and following packer grouting sketch map in the pipe;
Fig. 9 is section grouting effect and second section grouting sketch map at the bottom of the slip casting mould bag fabrication hole in the pipe;
Figure 10 is the outer slip casting mould bag technology floral tube mounting structure sketch map of pipe;
Figure 11 is a slip casting mould bag technology floral tube mounting structure sketch map in the pipe.
Among the figure, the 1st, cover plate, the 2nd, the mould bag, the 3rd, elastomeric material, 4a are mould bag injected holes, and 4b is a slurry outlet, and 4c is the outer Grouting Pipe of pipe, the 5th, anti-slip ring, the 6th, inlet pipe, the 7th, return pipe, the 8th, packer, the 9th, slip casting bulging die bag, the 10th, grouting stratum.
The specific embodiment
Through embodiment the present invention is further described below; Present embodiment only is used for the present invention is further explained; But can not be interpreted as the restriction to protection domain of the present invention, those skilled in the art can make the scope that some nonessential improvement and adjustment belong to the present invention's protection according to the content of the invention described above.
The outer slip casting mould bag technology of preset floral tube pipe
In conjunction with Fig. 1 to Fig. 6, Figure 10.
Rig: rig adopts the boring of Atlas A66CB import multifunctional all-hydraulic track-mounted drill, Gramer KR805-1, HM-90K hydraulic drill rig;
Grouting equipment: 3SNS high pressure grouting pump is adopted in grouting.
Ventilation apparatus: ventilation apparatus adopts Atlas XRHS415MD, the high blast air compressor machine of XHP900WCAT.
Hanging device: 20 tons of mobile cranes.
As scheming saidly, Fig. 1 utilizes that high efficiency rig (like Te Lasi A66 type import rock anchor rig) is disposable to advance pore-forming with pipe bit; Fig. 2 is lowered in the sleeve pipe to have to rise behind the floral tube that valve pocket, segmentation block the film bag to pull out sleeve pipe; Fig. 3 is that Grouting Pipe slip casting is expanded the mould bag outside mould bag pipe; Fig. 4 is lowered to packer, and section is blocked first section grouting of beginning at the bottom of the hole; Fig. 5 is that jam was carried out second section grouting after first section grouting was accomplished; Fig. 6 is repetition Fig. 4, Fig. 5 work, and packer grouting is to the aperture from bottom to top.
Work progress
⑴ boring can use various suitable machineries and method to creep into grout hole.Owing in boring, will be lowered to floral tube, therefore holing aperture, whole hole should not be too little, is generally φ 91～φ 140mm; Drilling machine should select for use precision height, drilling depth to creep into the rig that hole depth can satisfy the grouting needs soon.
Boring is accomplished the back with boring mud in " wind and water combined flushing " mode cleaning hole, divides into the floral tube back that finishes and pulls out sleeve pipe.
⑵ the floral tube floral tube can be used the tubing processing of φ 60～φ 89mm under, and this example is selected steel pipe or plastic pipe for use.In satisfying pipe, can be lowered to smoothly under the prerequisite of packer, pipe diameter should be as far as possible little.The floral tube inwall must be smooth, and the pipe underseal closes wants tight firm.Whenever bore a ring slurry outlet, 3～4 holes of every ring, aperture 10～15mm at a distance from 33～50cm on the pipe.The periphery of slurry outlet, with elasticity better elastic material banding, this example is selected rubber case for use, and the thickness of rubber case is 1.5～2.2mm, width 100～150mm.As making rubber case, respond well with motorcycle tyre tube.In order to prevent that rubber case moves or turnup when descending floral tube, use the thin wire colligation in its lower end, be referred to as anti-slip ring.
Like this, each rubber case such as same one-way cock, slurries can flow out from inside to outside under the grouting pressure effect, but after grouting end or the termination, slurries can not backflow.
The mould bag, according to the required segment length of grouting colligation mould bag on floral tube, mould bag diameter is confirmed according to the aperture; Length should not be greater than the spacing of floral tube slurry outlet; It plays obstruction in the annular gap of floral tube and boring, guarantee that slurries can laterally flow out when grouting, and can be along emitting on the hole wall.
Should the neat standard of dimensions as the tubing of floral tube, be convenient to processing and be connected; Inwall is smooth smooth, and packer can inside move freely; Has enough intensity, the external and internal pressure in the time of bearing grouting and following pipe.
Because the curtain grouting hole depth is deep, every cover floral tube needs to couple together with many floral tubes.
Following floral tube is one critical process of pre-buried floral tube method grouting; Should check by joint before floral tube is lowered to, carry out full hole on ground and install in advance, by the joint numbering; Following Guan Shiying checks and writes down each section floral tube length and overlap joint size in detail, divides into the deviation of position and design attitude etc.Distance must not be greater than 20cm at the bottom of the hole in the floral tube lower end.Aperture 10～20cm above ground level.
Floral tube is in the time of the work of not being in the milk, and the mouth of pipe all will add stopper or lid, prevents to fall into foreign matter.
⑶ after mould bag blocked the floral tube installation, the bulging die bag made the mould bag of filling after expanding be blocked in the annular gap of floral tube and boring, guarantees that slurries can only laterally flow out when grouting, and can be along emitting on the hole wall.
The mould bag is filled slip casting has dual mode: this example adopts the outer slip casting of pipe; Promptly do not pass through floral tube; Other establishes the mode of the outer Grouting Pipe grouting filling mould bag of mould bag pipe, during colligation mould bag, Grouting Pipe outside the pipe is installed in the mould bag; From then on cement paste manages outer Grouting Pipe injection expands the mould bag, thereby reaches the purpose of blocking floral tube and boring annular gap.
⑷ grouting, need not waited to coagulate and wait for after the mould bag expands and plays blocking action for selecting for use the outer grouting mode of pipe to fill the mould bag, directly plug grouting down, during grouting by pouring into the synchronous principle segmentation jam of mould bag.
Slip casting mould bag technology in the preset floral tube pipe
In conjunction with Fig. 1, Fig. 7, Fig. 8, Fig. 9 and Figure 11.
As shown in the figure, Fig. 1 utilizes the disposable pipe bit of following of high efficiency rig (like Te Lasi A66 type import rock anchor rig) to advance pore-forming; Be lowered in Fig. 7 sleeve pipe to have to rise behind the floral tube that valve pocket, segmentation block the film bag and pull out sleeve pipe; Fig. 8 is lowered to packer, and little pressure injection expands the mould bag through the injected hole slip casting that is provided with on the floral tube, boosts, and first section is in the milk, and carries out second section jam after the completion, the bulging die bag; After Fig. 9 treats that blocking action is played in the expansion of film bag, the second section grouting of beginning of boosting; Repeat d, e work, packer grouting is to the aperture from bottom to top.
In the preset floral tube pipe slip casting mould bag technology with manage that outer slip casting mould bag is different only to be that the slip casting of bulging die bag is different.
In embodiment construction sequence ⑶ mould bag blocks, adopt slip casting in the pipe, i.e. mode through the mould bag injected hole grouting filling mould bag that is provided with on the floral tube; During colligation mould bag, floral tube mould bag section is provided with mould bag injected hole, but rubber case is not installed; Use the asynchronous expansion of little pressure mud jacking to block the film bag earlier in when grouting, because other part slurry outlets are provided with rubber case, during little pressure grouting; Slurries can only not be provided with the mould bag injected hole outflow of rubber case from mould bag section, fill the mould bag, thereby reach the effect that the film bag is blocked in asynchronous expansion; After treating that blocking action is played in the expansion of film bag, boosting begins to carry out packer grouting through slurry outlet.
When grouting mode was filled the mould bag in the pipe, packer should block to more than the mould bag injected hole, and next section floral tube slurry outlet is with upper/lower positions, so that cement grout is preferentially filled the mould bag during grouting, reached and stoped the purpose of going here and there on the slurries.
The engineering example
Technical scheme of the present invention has been adopted in certain weir, a second phase upper reaches curtain left side, power station shoulder covering layer curtain grouting; Pitch-row 1.5m; Array pitch 0.75m, the quincunx interlaced arrangement of three rounds is handled the degree of depth for being 92m the most deeply; Irritate back quality examination achievement and show that its transmission coefficient of covering layer seepage preventing curtain grouting position is all less than 1 * 10
-4Cm/s.Behind the excavation of foundation pit, covering layer antiseepage position do not see ooze, leak source, its anti-seepage effect is remarkable.Obtained the consistent favorable comment of owner, design, management.
Claims (7)
1. a curtain grouting technology adopts preset floral tube grouting process, it is characterized in that may further comprise the steps: boring, floral tube is installed, and the mould bag blocks, grouting;
Boring: rig boring, 140 millimeters of diameter phi 91～φ, the boring afterflush is also removed boring mud;
Floral tube is installed: 89 millimeters floral tubes of diameter phi 60～φ are put into along borehole casing, and floral tube lower end distance at the bottom of the hole is not more than 20 centimetres, and 10～20 centimetres above ground level of aperture pulls up sleeve pipe; Said floral tube pipe underseal closes, on the tube wall 33～50 centimetres of axially spaced-aparts have around one group of slurry outlet, 3～4 of every group of slurry outlets circumferentially evenly are provided with at tube wall; 10～15 millimeters in aperture; The external surface of every group of slurry outlet is used the elastomeric material shroud ring, and the elastomeric material lower end has anti-slip ring to fix; The with good grounds grouting segmentation of said floral tube outer wall segment length spacer ring is around the mould bag of colligation;
The mould bag blocks: after the floral tube installation, slip casting bulging die bag makes the mould bag of filling after expanding block the annular gap of floral tube outer wall and drill hole wall, guarantee slurries when being in the milk not along emitting on the hole wall;
Grouting: following packer packer grouting.
2. curtain grouting technology according to claim 1 is characterized in that: slip casting bulging die bag adopts the outer slip casting of pipe to expand.
3. curtain grouting technology according to claim 2 is characterized in that: behind the slip casting bulging die bag, and following packer grouting, segmentation jam perfusion during grouting.
4. curtain grouting technology according to claim 1 is characterized in that: slip casting bulging die bag adopts slip casting expansion in the pipe.
5. curtain grouting technology according to claim 4 is characterized in that: during slip casting bulging die bag, with packer be arranged on more than the mould bag injected hole, next section floral tube slurry outlet is with upper/lower positions, makes grouting liquid preferentially fill the mould bag.
6. according to each described curtain grouting technology of claim 1 to 5, it is characterized in that: the elastomeric material of said shroud ring slurry outlet external surface is the rubber skin.
7. curtain grouting technology according to claim 6 is characterized in that: said floral tube is connected to form by many segmentation tubing.
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| CN103410063A (en) * | 2013-08-29 | 2013-11-27 | 中国铁道科学研究院铁道建筑研究所 | Grouting lifting rapid renovating technologies for ballastless track sedimentation |
| CN103498478A (en) * | 2013-10-23 | 2014-01-08 | 中国水电顾问集团成都勘测设计研究院有限公司 | Curtain grouting construction method for rock dam foundation |
| CN104213562A (en) * | 2014-08-12 | 2014-12-17 | 中国科学院力学研究所 | Plugging device of grouting hole and using method thereof |
| CN105062510A (en) * | 2015-08-03 | 2015-11-18 | 中国三冶集团有限公司 | Coke oven observation hole hot repairing method and hot repairing tool thereof |
| CN105804106A (en) * | 2016-04-07 | 2016-07-27 | 江苏鼎达建筑新技术有限公司 | Cloth bag grouting pipe for blocking gushing water in sand soil layer through polyurethane grouting |
| CN106120829A (en) * | 2016-07-28 | 2016-11-16 | 北京振冲工程股份有限公司 | A kind of deep hole grout curtain overfall thickens construction method |
| CN106709211A (en) * | 2017-01-24 | 2017-05-24 | 江苏昌泰建设工程有限公司 | Method for using tailings mold bag wall to fill ore pillar recovery under pit |
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| CN108756970A (en) * | 2018-07-12 | 2018-11-06 | 安徽理工大学 | A kind of hollow grouting cable anchor of segmented and application method |
| CN109184748A (en) * | 2018-11-01 | 2019-01-11 | 山东大学 | A kind of pressure controllable grouting equipment and its method |
| CN110644295A (en) * | 2019-10-31 | 2020-01-03 | 中铁二院工程集团有限责任公司 | Assembled karst grouting protective pipe assembly and grouting method |
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| CN103410063A (en) * | 2013-08-29 | 2013-11-27 | 中国铁道科学研究院铁道建筑研究所 | Grouting lifting rapid renovating technologies for ballastless track sedimentation |
| CN103410063B (en) * | 2013-08-29 | 2015-09-16 | 中国铁道科学研究院铁道建筑研究所 | A kind of slip-casting lifting fast repairing method for sedimentation non-fragment orbit |
| CN103498478A (en) * | 2013-10-23 | 2014-01-08 | 中国水电顾问集团成都勘测设计研究院有限公司 | Curtain grouting construction method for rock dam foundation |
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Application publication date: 20121121 |