WO1995006185A1 - Prefabricated shaft element - Google Patents
Prefabricated shaft element Download PDFInfo
- Publication number
- WO1995006185A1 WO1995006185A1 PCT/AT1994/000119 AT9400119W WO9506185A1 WO 1995006185 A1 WO1995006185 A1 WO 1995006185A1 AT 9400119 W AT9400119 W AT 9400119W WO 9506185 A1 WO9506185 A1 WO 9506185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft element
- openings
- climbing
- plastic lining
- climbing aid
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/124—Shaft entirely made of synthetic material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted
- E06C9/04—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted in the form of climbing irons or the like
Definitions
- the invention relates to a prefabricated manhole element for the
- ascending shafts consisting of a base body, preferably made of concrete or another cement-bound material, on the inner wall of which a lining made of plastic is provided and a climbing aid consisting of individual climbing elements or climbing ladders or ladder parts is fastened.
- shaft elements that are placed on a channel floor having the channel.
- These shaft elements usually consist of concrete rings, which are provided on the end face with recesses and projections for mutual securing of the position and which are usually equipped with a climbing aid to enable people to climb down the shaft.
- This climbing aid consists either of individual climbing elements, for example of metal pipes or rods, the ends of which are built into the concrete during the manufacuring process of the manhole elements, or of climbing ladders or ladder parts, which are usually retrofitted to the wall of the manhole elements that have already been completed assembled shaft are fastened by means of suitable fasteners.
- a sewage shaft has already become known, which consists of a base body made of a relatively hard material such as asbestos cement or concrete, which base body ensures the required strength and rigidity, and of a plastic shell, through which an absolute tightness , Corrosion resistance and abrasion resistance is obtained.
- the plastic shell can only be provided on the outside wall, on the inside wall or on both sides of the base body.
- the present invention has for its object to improve a shaft element with the structure just described so that easy installation of the climbing aid is possible with simple manufacture.
- the invention proposes that the Plastic lining is provided with fixing devices for the climbing aid. These fixing devices enable the climbing aid to be attached in a desired, predetermined position without additional aids, while at the same time protecting the inner wall of the concrete or the like. existing basic body. There is therefore no need for any special formwork means which are only required for fixing the climbing aid and whose removal from the form by the fixed climbing aid is tedious.
- the fixing devices can, for example, be bowl-shaped receptacles for parts of the climbing aid.
- openings are provided in the plastic lining, in which projections of the climbing aid are inserted. These openings allow the projections and thus the climbing aid itself to be securely fixed and prevent the climbing aid from being removed unintentionally.
- the openings preferably penetrate the wall of the plastic lining, the projections projecting into the base body and being anchored therein.
- the plastic lining forms, at least in connection with corresponding supporting or spreading devices, the formwork during the manufacture of the base body and the base body takes over at least the majority of the forces occurring when climbing the climbing aid, so that the plastic lining can be dimensioned weaker in this embodiment .
- the projections can be provided with a thickened end, the width of which at least at one point exceeds the diameter of the openings.
- FIG.l shows a longitudinal section through an ascending shaft, which is composed of several shaft elements according to the invention.
- Fig.2 shows a cross section along the line II-II in Fig.l.
- the shaft shown in FIG. 1 consists of a plurality of shaft elements 2 arranged one above the other and secured against lateral displacement by recesses and projections 1, the shaft elements 2, as can be seen from the drawing, having different heights.
- the shaft elements 2 consist of a base body 3 made of concrete, on the inner wall of which a lining 4 made of plastic material with appropriate strength, corrosion resistance and tightness is provided.
- a climbing aid is provided in the interior of the shaft element, which in the illustrated embodiment, as can be seen in FIG. 2, consists of straight metal rods 5.
- FIG. 1 consists of a plurality of shaft elements 2 arranged one above the other and secured against lateral displacement by recesses and projections 1, the shaft elements 2, as can be seen from the drawing, having different heights.
- the shaft elements 2 consist of a base body 3 made of concrete, on the inner wall of which a lining 4 made of plastic material with appropriate strength, corrosion resistance and tightness is provided.
- a climbing aid is provided in the interior of the shaft element, which in the illustrated
- the plastic lining 4 has a niche 6 extending in the radial direction, the opposite side walls 7 of which are provided with openings 8 through which the rod-shaped riser elements 5 extend with their projecting ends.
- the climbing elements 5 are provided with a thickened end 9 which is shaped so that the climbing elements 5 cannot slide out of the openings 8 during the manufacture of the box elements. The anchoring of the thickened end, as can be seen from FIG.
- riser ladder parts can of course also be arranged in each shaft element 2, which are provided with projections which extend in the direction of the ends of the riser elements provided in the exemplary embodiment shown and thus likewise pass through the openings 8 in the side walls 7 of the niches 6 and are anchored in the base body 3.
Abstract
Proposed is a prefabricated shaft element for use in the construction of vertical shafts, the shaft element consisting of a main body (3), made preferably of concrete, and a plastic lining (4) fitted to the inside wall of the main body. The plastic lining has a recess (6) extending radially round it, the recess having openings (8) located opposite each other on each side wall (7). The ends of rod-shaped climbing rungs (5) fit into these openings (8) in such a way that they are held securely in place by these openings (8).
Description
VORGEFERTIGTES SCHACHTELEMENT Die Erfindung betrifft ein vorgefertigtes Schachtelement für die Prefabricated manhole element The invention relates to a prefabricated manhole element for the
Herstellung von aufsteigenden Schächten, bestehend aus einem Grundkörper, vorzugsweise aus Beton oder einem anderen zementgebundenen Material, an dessen Innenwand eine Auskleidung aus Kunststoff vorgesehen ist und eine Steighilfe, bestehend aus einzelnen Steigelementen oder aus Steigleitern bzw. -leiternteilen, befestigt ist.Production of ascending shafts, consisting of a base body, preferably made of concrete or another cement-bound material, on the inner wall of which a lining made of plastic is provided and a climbing aid consisting of individual climbing elements or climbing ladders or ladder parts is fastened.
Es ist bereits bekannt, Schächte, die beispielsweise für dieIt is already known to use shafts for example for the
Inspektion und Reinigung von Abwasserkanälen dienen, aus vorgefertigtenInspection and cleaning of sewers serve from prefabricated
Schachtelementen zusammenzusetzen, die auf einen das Gerinne aufweisenden Schachtboden aufgesetzt werden. Diese Schachtelemente bestehen üblicherweise aus Betonringen, die stirnseitig mit Ausnehmungen und Vorsprüngen zur gegenseitigen Lagesicherung versehen sind und die üblicherweise mit einer Steighilfe ausgestattet sind, um Personen das Absteigen im Schacht zu ermöglichen. Diese Steighilfe besteht entweder aus einzelnen Steigelementen, beispielsweise aus Metallrohren oder -Stangen, deren Enden während des Fertiguπgsprozesses der Schachtelemente in den Beton eingebaut werden, oder aus Steigleitern bzw. Leiternteilen, die in der Regel nachträglich an der Wand des bereits fertiggestellten, aus einzelnen Schachtelementen zusammengesetzten Schachtes mittels geeigneter Befestigungselemente befestigt werden.To assemble shaft elements that are placed on a channel floor having the channel. These shaft elements usually consist of concrete rings, which are provided on the end face with recesses and projections for mutual securing of the position and which are usually equipped with a climbing aid to enable people to climb down the shaft. This climbing aid consists either of individual climbing elements, for example of metal pipes or rods, the ends of which are built into the concrete during the manufacuring process of the manhole elements, or of climbing ladders or ladder parts, which are usually retrofitted to the wall of the manhole elements that have already been completed assembled shaft are fastened by means of suitable fasteners.
Es ist auch bereits bekannt, das Schachtelement und die Steighilfe einstückig aus Beton zu formen. Dies erfordert jedoch komplizierte und teure Formen und der Herstellungsvorgang, insbesondere das Entschalen, sind bei dieser bekannten Ausbildung kompliziert. Aus der DE-OS 22 54 818 ist bereits ein Kanalisationsschacht be¬ kanntgeworden, der aus einem Grundkörper aus einem verhältnismäßig hartem Material wie Asbestzement oder Beton, welcher Grundkörper die erforderliche Festigkeit und Steifigkeit gewährleistet, und aus einer Kunststoffschale besteht, durch welche eine absolute Dichtheit, Korrosionsbeständigkeit und Abriebfestigkeit erhalten wird. Je nachdem ob die Abdichtung und der Korrosionsschutz auf der Außen- oder auf der Innenseite oder auf beiden Seiten der Schachtwandung gewünscht wird, kann die Kunststoffschale lediglich an der Außenwand, an der Innenwand oder auf beiden Seiten des Grundkörpers vorgesehen sein.It is also already known to form the shaft element and the climbing aid in one piece from concrete. However, this requires complicated and expensive molds and the manufacturing process, in particular the demoulding, is complicated with this known design. From DE-OS 22 54 818 a sewage shaft has already become known, which consists of a base body made of a relatively hard material such as asbestos cement or concrete, which base body ensures the required strength and rigidity, and of a plastic shell, through which an absolute tightness , Corrosion resistance and abrasion resistance is obtained. Depending on whether sealing and corrosion protection is required on the outside or on the inside or on both sides of the shaft wall, the plastic shell can only be provided on the outside wall, on the inside wall or on both sides of the base body.
Die vorliegende Erfindung hat sich zur Aufgabe gestellt, ein Schachtelement mit dem eben beschriebenen Aufbau derart zu verbessern, daß bei einfacher Herstellung eine leichte Anbringung der Steighilfe möglich ist. Zur Lösung dieser Aufgabe schlägt die Erfindung vor, daß die
Kunststoffauskleidung mit Fixiereinrichtungen für die Steighilfe versehen ist. Diese Fixiereinrichtungen ermöglichen eine Anbringung der Steighilfe in einer gewünschten, vorbestimmten Lage ohne zusätzliche Hilfsmittel bei gleichzeitigem Schutz der Innenwand des aus Beton od.dgl. bestehenden Grundkörpers. Es sind somit keine gesonderten Schalungsmittel erforderlich, die lediglich für die Fixierung der Steighilfe benötigt werden und deren Entformen durch die fixierte Steighilfe mühsam ist.The present invention has for its object to improve a shaft element with the structure just described so that easy installation of the climbing aid is possible with simple manufacture. To achieve this object, the invention proposes that the Plastic lining is provided with fixing devices for the climbing aid. These fixing devices enable the climbing aid to be attached in a desired, predetermined position without additional aids, while at the same time protecting the inner wall of the concrete or the like. existing basic body. There is therefore no need for any special formwork means which are only required for fixing the climbing aid and whose removal from the form by the fixed climbing aid is tedious.
Die Fixiereinrichtungen können beispielsweise schalenförmige Aufnahmen für Teile der Steighilfe sein. Gemäß einer bevorzugten Ausführungsform der Erfindung sind aber in der Kunststoffauskleidung Öffnungen vorgesehen, in welche Vorsprünge der Steighilfe eingesetzt sind. Diese Öffnungen ermöglichen eine sichere Fixierung der Vorsprünge und damit der Steighilfe selbst und verhindern ein ungewolltes Entfernen der Steighilfe. Vorzugsweise durchsetzen die Öffnungen die Wand der Kunststoffauskleidung, wobei die Vorsprünge in den Grundkörper hineinragen und in diesem verankert sind. Die Kunststoffauskleidung bildet in diesem Fall, zumindest in Verbindung mit entsprechenden Abstütz- bzw. Spreitzeinrichtungen, die Schalung bei der Herstellung des Grundkörpers und der Grundkörper übernimmt zumindest den Großteil der beim Begehen der Steighilfe auftretenden Kräfte, sodaß die Kunststoffauskleidung bei dieser Ausführungsform schwächer dimensioniert werden kann. Um ein unerwünschtes Herausgleiten der Vorsprünge aus den Öffnungen bei der Fertigung des Schachtelementes zu verhindern, können die Vorsprünge mit einem verdickten Ende versehen sein, dessen Breite an zumindest einer Stelle den Durchmesser der Öffnungen übersteigt.The fixing devices can, for example, be bowl-shaped receptacles for parts of the climbing aid. According to a preferred embodiment of the invention, openings are provided in the plastic lining, in which projections of the climbing aid are inserted. These openings allow the projections and thus the climbing aid itself to be securely fixed and prevent the climbing aid from being removed unintentionally. The openings preferably penetrate the wall of the plastic lining, the projections projecting into the base body and being anchored therein. In this case, the plastic lining forms, at least in connection with corresponding supporting or spreading devices, the formwork during the manufacture of the base body and the base body takes over at least the majority of the forces occurring when climbing the climbing aid, so that the plastic lining can be dimensioned weaker in this embodiment . In order to prevent undesired sliding out of the projections from the openings during the manufacture of the shaft element, the projections can be provided with a thickened end, the width of which at least at one point exceeds the diameter of the openings.
Eine besonders zweckmäßige Ausführung ergibt sich dann, wenn die Fixiereinrichtungen an gegenüberliegenden Seitenwänden einer in der Kunst¬ stoffauskleidung sich in radialer Richtung erstreckenden Nische vorgesehen sind. Die vorzugsweise von den Öffnungen gebildeten Fixiereinrichtungen lassen sich bei dieser Ausführungsform insbesondere dann, wenn die Steighilfe von einzelnen gerade verlaufenden Steigelementen gebildet ist, leicht an den erforderlichen Stellen anordnen und es wird auch der erforderliche Freiraum für die Füße der die Steighilfe benützenden Person sichergestellt. In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispieles schematisch erläutert. Fig.l zeigt einen Längsschnitt durch einen aufsteigenden Schacht, der aus mehreren erfindungsgemäßen Schachtelementen zusammengesetzt ist. Fig.2 stellt einen Querschnitt nach der Linie II-II
in Fig.l dar.A particularly expedient embodiment is obtained if the fixing devices are provided on opposite side walls of a niche extending in the radial direction in the plastic lining. The fixing devices, which are preferably formed by the openings, can be easily arranged in this embodiment, in particular if the climbing aid is formed by individual straight climbing elements, and the required free space for the feet of the person using the climbing aid is also ensured. In the drawing, the invention is explained schematically using an exemplary embodiment. Fig.l shows a longitudinal section through an ascending shaft, which is composed of several shaft elements according to the invention. Fig.2 shows a cross section along the line II-II in Fig.l.
Der in Fig.l dargestellte Schacht besteht aus mehreren überein¬ ander angeordneten und durch Ausnehmungen und Vorsprünge 1 gegen seitliche Verschiebung gesicherten Schachtelementen 2, wobei die Schachtelemente 2, wie aus der Zeichnung ersichtlich ist, verschiedene Höhen aufweisen können. Die Schachtelemente 2 bestehen aus einem Grundkörper 3 aus Beton, an dessen Innenwand eine Auskleidung 4 aus Kunststoffmaterial mit entsprechender Festigkeit, Korrosionsbeständigkeit und Dichtheit vorgesehen ist. Ferner ist im Inneren des Schachtelementes eine Steighilfe vorgesehen, die beim dargestellten Ausführungsbeispiel, wie aus Fig.2 hervorgeht, aus gerade verlaufenden Metallstäben 5 besteht. Wie gleichfalls aus Fig.2 hervorgeht, weist die Kunststoffauskleidung 4 eine sich in radialer Richtung erstreckende Nische 6 auf, deren gegenüberliegende Seitenwände 7 mit Öffnungen 8 versehen sind, durch welche sich die stabförmigen Steigelemente 5 mit ihren vorspringenden Enden hindurcherstrecken. Die Steigelemente 5 sind hiebei mit einem verdickten Ende 9 versehen, das so geformt ist, daß die Steigelemente 5 aus den Öffnungen 8 bei der Herstellung des Schachtelemeπtes nicht herausgleiten können. Die Verankerung des verdickten Endes erfolgt, wie aus Fig.2 ersichtlich ist, im Grundkörper 3 aus Beton, sodaß die beim Begehen der Steigelemente 5 auf diese einwirkenden Kräfte zumindest zum Großteil von diesem Grundkörper 3 aufgenommen werden.The shaft shown in FIG. 1 consists of a plurality of shaft elements 2 arranged one above the other and secured against lateral displacement by recesses and projections 1, the shaft elements 2, as can be seen from the drawing, having different heights. The shaft elements 2 consist of a base body 3 made of concrete, on the inner wall of which a lining 4 made of plastic material with appropriate strength, corrosion resistance and tightness is provided. Furthermore, a climbing aid is provided in the interior of the shaft element, which in the illustrated embodiment, as can be seen in FIG. 2, consists of straight metal rods 5. As can also be seen from FIG. 2, the plastic lining 4 has a niche 6 extending in the radial direction, the opposite side walls 7 of which are provided with openings 8 through which the rod-shaped riser elements 5 extend with their projecting ends. The climbing elements 5 are provided with a thickened end 9 which is shaped so that the climbing elements 5 cannot slide out of the openings 8 during the manufacture of the box elements. The anchoring of the thickened end, as can be seen from FIG.
Anstelle der einzelnen rohrför igen Steigelemente können in jedem Schachtelement 2 natürlich auch Steigleiternteile angeordnet werden, die mit Vorsprüngen versehen sind, welche sich in Richtung der Enden der beim dargestellten Ausführungsbeispiel vorgesehenen Steigelemente erstrecken und somit gleichfalls die Öffnungen 8 in den Seitenwänden 7 der Nischen 6 durchsetzen und im Grundkörper 3 verankert sind. Patentansprüche:
Instead of the individual tubular riser elements, riser ladder parts can of course also be arranged in each shaft element 2, which are provided with projections which extend in the direction of the ends of the riser elements provided in the exemplary embodiment shown and thus likewise pass through the openings 8 in the side walls 7 of the niches 6 and are anchored in the base body 3. Claims:
Claims
1. Vorgefertigtes Schachtelement für die Herstellung von auf¬ steigenden Schächten, bestehend aus einem Grundkörper (3), vorzugsweise aus Beton oder einem anderen zementgebundeneπ Material, an dessen Innenwand eine Auskleidung (4) aus Kunststoff vorgesehen ist und eine Steighilfe, bestehend aus einzelnen Steigelementen (5) oder aus Steigleitern bzw. -leiternteilen, befestigt ist, dadurch gekennzeichnet, daß die Kunststoffauskleidung (4) mit Fixiereinrichtungen (8) für die Steighilfe (5) versehen ist.1. Prefabricated shaft element for the production of rising shafts, consisting of a base body (3), preferably made of concrete or another cement-bound material, on the inner wall of which a lining (4) made of plastic is provided and a climbing aid consisting of individual climbing elements (5) or from climbing ladders or ladder parts, characterized in that the plastic lining (4) is provided with fixing devices (8) for the climbing aid (5).
2. Schachtelement nach Anspruch 1, dadurch gekennzeichnet, daß in der Kunststoffauskleidung (4) Öffnungen (8) vorgesehen sind, in welche Vorsprünge der Steighilfe (5) eingesetzt sind.2. shaft element according to claim 1, characterized in that in the plastic lining (4) openings (8) are provided, in which projections of the climbing aid (5) are used.
3. Schachtelement nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Öffnungen (8) die Wand der Kunststoffauskleidung (4) durchsetzen, wobei die . Vorsprünge in den Grundkörper (3) hineinragen und in diesem verankert sind.3. shaft element according to claim 1 and 2, characterized in that the openings (8) penetrate the wall of the plastic lining (4), the. Protrusions protrude into the base body (3) and are anchored in this.
4. Schachtelement nach Anspruch 3, dadurch gekennzeichnet, daß die Vorsprünge mit einem verdickten Ende (9) versehen sind, dessen Breite an zumindest einer Stelle den Durchmesser der Öffnungen (8) übersteigt.4. shaft element according to claim 3, characterized in that the projections are provided with a thickened end (9) whose width exceeds the diameter of the openings (8) at at least one point.
5. Schachtelement nach einem der Ansprüche 1 bis 4, dadurch ge¬ kennzeichnet, daß die Fixiereinrichtungen an gegenüberliegenden Seitenwänden (7) einer in der Kunststoffauskleidung (4) sich in radialer Richtung erstreckenden Nische (6) vorgesehen sind. 5. shaft element according to one of claims 1 to 4, characterized ge indicates that the fixing devices on opposite side walls (7) in the plastic lining (4) extending in the radial direction niche (6) are provided.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT171093 | 1993-08-25 | ||
| ATA1710/93 | 1993-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995006185A1 true WO1995006185A1 (en) | 1995-03-02 |
Family
ID=3519311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT1994/000119 WO1995006185A1 (en) | 1993-08-25 | 1994-08-24 | Prefabricated shaft element |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1995006185A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1003376C2 (en) * | 1996-06-19 | 1997-12-23 | Wavin Bv | Attachment for a well. |
| WO2006058380A1 (en) * | 2004-12-03 | 2006-06-08 | Bortana Pty Ltd | A ladderway system for underground raises |
| AU2005312343B2 (en) * | 2004-12-03 | 2010-09-02 | Bortana Pty Ltd | A ladderway system for underground raises |
| US9038775B2 (en) | 2010-01-13 | 2015-05-26 | Hiram (Wa) Pty Ltd | Ladderway system for underground raises |
| CN109026012A (en) * | 2018-07-25 | 2018-12-18 | 中国电建集团华东勘测设计研究院有限公司 | Vertical shaft surrounding rock supporting structure and its excavation supporting method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2233858A5 (en) * | 1973-06-12 | 1975-01-10 | Tuyaux Bonna | |
| US5081802A (en) * | 1990-02-15 | 1992-01-21 | Poly-Tec Products, Inc. | Method and apparatus for lining manhole assemblies and the like |
| WO1992014025A1 (en) * | 1991-02-04 | 1992-08-20 | Hurner S.A.R.L. | Construction of a structure with bars and longitudinal members, such as a ladder, and structure so obtained |
-
1994
- 1994-08-24 WO PCT/AT1994/000119 patent/WO1995006185A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2233858A5 (en) * | 1973-06-12 | 1975-01-10 | Tuyaux Bonna | |
| US5081802A (en) * | 1990-02-15 | 1992-01-21 | Poly-Tec Products, Inc. | Method and apparatus for lining manhole assemblies and the like |
| WO1992014025A1 (en) * | 1991-02-04 | 1992-08-20 | Hurner S.A.R.L. | Construction of a structure with bars and longitudinal members, such as a ladder, and structure so obtained |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1003376C2 (en) * | 1996-06-19 | 1997-12-23 | Wavin Bv | Attachment for a well. |
| WO1997048859A1 (en) * | 1996-06-19 | 1997-12-24 | Wavin B.V. | Top piece for a manhole structure |
| WO2006058380A1 (en) * | 2004-12-03 | 2006-06-08 | Bortana Pty Ltd | A ladderway system for underground raises |
| AU2005312343B2 (en) * | 2004-12-03 | 2010-09-02 | Bortana Pty Ltd | A ladderway system for underground raises |
| US8177028B2 (en) | 2004-12-03 | 2012-05-15 | Bortana Pty. Ltd. | Ladderway system for underground raises |
| US9038775B2 (en) | 2010-01-13 | 2015-05-26 | Hiram (Wa) Pty Ltd | Ladderway system for underground raises |
| CN109026012A (en) * | 2018-07-25 | 2018-12-18 | 中国电建集团华东勘测设计研究院有限公司 | Vertical shaft surrounding rock supporting structure and its excavation supporting method |
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