CN109667588B - Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method - Google Patents
Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method Download PDFInfo
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- CN109667588B CN109667588B CN201910102679.8A CN201910102679A CN109667588B CN 109667588 B CN109667588 B CN 109667588B CN 201910102679 A CN201910102679 A CN 201910102679A CN 109667588 B CN109667588 B CN 109667588B
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- box culvert
- sliding film
- pushing
- film
- sliding
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 21
- 230000001050 lubricating effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 35
- 210000001258 synovial membrane Anatomy 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 239000012791 sliding layer Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/005—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention belongs to the technical field of existing line culvert construction. A sliding film for reducing box culvert pushing disturbance, a box culvert pushing system and a construction method thereof, wherein the sliding film for reducing box culvert pushing disturbance comprises a bendable sliding film body with a rough surface and a smooth surface; the box culvert pushing system comprises a sliding film, a groove body perpendicular to the advancing direction of the box culvert is arranged behind the edge angle at the front end of the outer wall of the box culvert, a roller is arranged in the groove body, one end of the sliding film is fixed on the back wall, the other end of the sliding film is paved on the outer wall of the box culvert along the pushing advancing direction of the box culvert and bypasses the roller, the sliding film before bypassing the roller is paved with the sliding film, the rough surface of the paved sliding film is contacted with soil outside the box culvert and cannot slide relatively, the smooth surface of the paved sliding film is contacted with the outer wall of the box culvert and can slide relatively, the sliding film after bypassing the roller is unpaved with the sliding film, and the unpaved sliding film is arranged inside the box culvert; the construction method adopts the box culvert pushing system for construction. The technical scheme of the invention has small disturbance to the existing road.
Description
Technical Field
The invention belongs to the technical field of existing line culvert jacking construction, and particularly relates to a sliding film for reducing box culvert pushing disturbance, a box culvert pushing system and a construction method.
Background
When the box culvert of the existing line is constructed by adopting a jacking method, the jacking construction flow is as follows: (1) the method comprises the steps of digging a working pit, pouring a sliding plate, prefabricating a box culvert body on the sliding plate, constructing a back wall, reinforcing an existing route, installing jack equipment, jacking the box culvert, completing a jacking stroke, placing a jacking column at a neutral position, and performing (6) circulation until jacking is in place.
At present, the existing road or railway line is penetrated downwards by adopting a direct jacking construction method, the disturbance of the direct jacking method on the original road is relatively large, the original road is easy to damage and settle, and in order to reduce the disturbance on the soil body of the upper line when the box culvert is pushed, the methods of pipe shed, grouting, slurry lubrication and the like are generally adopted, but the effect is limited, the construction period is long, and the construction cost is high.
Disclosure of Invention
Aiming at the problems and the defects, the invention provides a sliding film, a box culvert pushing system and a construction method for reducing the box culvert pushing disturbance, which have small disturbance on the existing road, increase lubrication in jacking construction, reduce jacking resistance, achieve the effects of short period and low manufacturing cost, and basically do not influence the passing effect of the existing road.
In order to achieve the above purpose, the technical scheme adopted is as follows:
the utility model provides a reduce smooth film that box culvert pushed away disturbance for pushing away the in-process at the box culvert disposes between box culvert outer wall and soil body, including flexible smooth film body, the smooth film body sets up to the roughness with the adjacent one side of soil body, the smooth film body is smooth with the adjacent one side of box culvert outer wall.
According to the sliding film for reducing the box culvert pushing disturbance, the sliding film body comprises a strength layer and a smooth layer which are fixedly connected together, one surface of the strength layer exposed outwards is a rough surface, and one surface of the smooth layer exposed outwards is a smooth surface.
According to the sliding film for reducing the pushing disturbance of the box culvert, the strength layer is arranged in a woven net shape, and the smooth layer is arranged in a thin plate shape or a film shape.
According to the sliding film for reducing the box culvert pushing disturbance, the strength layer is a metal net or a carbon fiber net, and the smooth layer is a metal sheet or a carbon fiber film.
According to the sliding film for reducing the pushing disturbance of the box culvert, the connecting mode of the strength layer and the smooth layer is welding, bonding or pressing.
According to the sliding film for reducing the box culvert pushing disturbance, the sliding film body is made of metal or carbon fiber, and the sliding film body is formed by one-time forging or one-time pressing.
According to the sliding film for reducing the box culvert pushing disturbance, a lubricating layer is further arranged on the smooth surface of the sliding film body, and the lubricating layer is a lubricating grease layer or a talcum powder layer.
The utility model provides a reduce box culvert pushing system of box culvert pushing disturbance, includes the working well of setting below former circuit roadbed side ground, the side of working well relative with former circuit roadbed is equipped with the back wall, the bottom of working well is equipped with the end slide, be equipped with prefabricated box culvert on the end slide, be equipped with pushing device between back wall and the box culvert, still include the arbitrary piece before the synovial membrane, be equipped with behind the angle of edge of box culvert outer wall front end with box culvert advancing direction perpendicular cell body, install the roller in the cell body, one end of synovial membrane is fixed on the back wall, the other end along box culvert pushing advancing direction lay behind the box culvert outer wall bypass the roller, the synovial membrane before bypassing the roller is the synovial membrane already laid, the roughness face of synovial membrane and the outside soil body contact of box culvert already laid, and can not slide relatively, the smooth face of the slipform after bypassing the roller is not laid the synovial membrane, the setting is in the inside of box culvert; the outer wall of the box culvert is one or more of the top surface, the side surface and the bottom surface of the box culvert.
According to the box culvert pushing system for reducing the box culvert pushing disturbance, the outer wall of the box culvert is provided with a smooth sliding surface or a steel plate.
The construction method for reducing the box culvert pushing disturbance adopts the box culvert pushing system for reducing the box culvert pushing disturbance to carry out construction.
By adopting the technical scheme, the beneficial effects are that:
according to the scheme, the sliding film is arranged on the outer side of the box culvert, so that the sliding film is continuously paved forwards and forms a sliding layer in the process of pushing the box culvert into the soil body, the paved sliding film is fixed between the soil body and the box culvert and keeps motionless, the box culvert slides relative to the sliding film, the box culvert is synchronously paved forwards in the forward pushing process, the sliding film forms a cycle, the box culvert body is not directly contacted with the soil body, and the sliding film slides relative to the soil body, so that lubrication is achieved, the pushing resistance is reduced, and the disturbance to surrounding soil bodies in the box culvert pushing process is reduced; on the other hand, the invention reduces the jacking resistance and the propulsion energy consumption of the propulsion device by increasing the lubrication in the jacking construction.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description will briefly explain the drawings of the embodiments of the present invention. Wherein the showings are for the purpose of illustrating some embodiments of the invention only and not for the purpose of limiting the same.
Fig. 1 shows one of the schematic structural diagrams of a sliding film for reducing the pushing disturbance of a box culvert according to an embodiment of the invention.
Fig. 2 shows a second schematic diagram of a sliding film for reducing a pushing disturbance of a box culvert according to an embodiment of the invention.
Fig. 3 is a schematic diagram showing an operating state structure of a box culvert pushing system for reducing a box culvert pushing disturbance according to an embodiment of the invention.
Fig. 4 shows an enlarged schematic view of the roller region according to an embodiment of the present invention.
Number in the figure:
1 is a back wall, 2 is a paved sliding film, 3 is a sliding surface, 4 is a jack, 5 is a force transmission column, 6 is a bottom sliding plate, 7 is a box culvert, 8 is an undeposited sliding film, 9 is a roller, 10 is an original line roadbed, 11 is soil body, 12 is a rough surface, 13 is a smooth surface, 14 is a sliding film body, 141 is a strength layer, 142 is a smooth layer, 15 is a lubricating layer, 16 is a working well, 17 is a cutting edge, and 18 is a box culvert top plate.
Detailed Description
In order to make the objects, technical features and technical effects of the technical solution of the present invention more clear, an exemplary solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Referring to fig. 1-4, this embodiment discloses a sliding film for reducing box culvert pushing disturbance, which is configured between an outer wall of a box culvert and a soil body 11 in a box culvert 7 pushing process, and comprises a flexible sliding film body 14, wherein the curved radian of the sliding film body 14 can meet the rolling of the outer side of a roller 9, one surface of the sliding film body 14 adjacent to the soil body 11 is set as a rough surface 12, and one surface of the sliding film body 14 adjacent to the outer wall of the box culvert is set as a smooth surface 13.
The material of the sliding film body 14 is metal or carbon fiber, but is not limited to these two materials.
One possible implementation of the slide film body 14 is: the sliding film body 14 includes a strength layer 141 and a smooth layer 142 fixedly connected together, the connection mode of the strength layer 141 and the smooth layer 142 is welding or bonding or pressing, the outwards exposed surface of the strength layer 141 is a rough surface 12, the outwards exposed surface of the smooth layer 142 is a smooth surface 13, the strength layer 141 is set to be a woven net-shaped structure, for example, can be a dense net-shaped structure woven by steel wires or carbon fiber materials, has stronger tensile strength and can resist the tensile and friction force in the advancing process of the box culvert 7, the smooth layer 142 is set to be a thin plate or a film, for example, is composed of a thin steel plate or a carbon fiber film which can be bent, and the smooth layer 142 and the strength layer 141 are tightly pressed into a whole.
Another possible embodiment of the slide film body 14 is: the slide film body 14 is formed by forging a metal material or the like or by pressing a carbon fiber material or the like, and is provided with a rough surface 12 and a smooth surface 13.
Further, the smooth surface of the slide film body 14 is further provided with a lubricating layer 15, the lubricating layer 15 is a lubricating grease layer or a talcum powder layer uniformly coated on the smooth surface 13 of the slide film body 14, and the lubricating layer is not limited to the two lubricating materials.
The embodiment also discloses a box culvert pushing system for reducing box culvert pushing disturbance, which comprises a working well 16 and the sliding film, wherein the working well 16 and the sliding film are arranged below the ground of the side edge of an original line roadbed, the width of the sliding film is equal to the width of the outer side wall of the paved box culvert, the length can ensure that the box culvert 7 is pushed out of a hole, the side edge of the working well 16 opposite to the original line roadbed 10 is provided with a back wall 1, the bottom of the working well 16 is provided with a bottom sliding plate 6, the bottom sliding plate 6 is provided with a prefabricated box culvert 7, a pushing device is arranged between the back wall 1 and the box culvert 7, the pushing device comprises a jack 4 and a force transmission column 5 which are sequentially arranged, a groove body perpendicular to the advancing direction of the box culvert 7 is arranged behind a cutting edge 17 at the front end of the box culvert outer wall, a roller 9 is arranged in the groove body, one end of the sliding film is fixed on the back wall 1, the other end of the sliding film bypasses the roller 9 along the advancing direction of the box culvert, the front of the roller 9, the film before bypassing the roller 9 is the sliding film 2, the rough surface 12 of the sliding film 2 contacts with the outer box culvert 11, and can not be made into a sliding film 8 which can not be laid in contact with the sliding film 8, and can not be made into a sliding film 8 which is not laid in the sliding film, and is not convenient to be laid by the sliding film 7; the outer wall of the box culvert is one or more of the top surface, the side surface and the bottom surface of the box culvert, and is selected according to construction requirements.
In order to further reduce the frictional resistance between the sliding film and the outer wall of the box culvert, the outer wall of the box culvert is provided with a smooth sliding surface 3 or a steel plate.
The box culvert pushing system for reducing the box culvert pushing disturbance has the following working principle:
assuming that a sliding film is paved on the top surface of a box culvert, when the box culvert is used, one end of the sliding film is fixed on a back wall 1, the sliding film is fully paved on the top surface of the box culvert along the pushing advancing direction, a lubricating layer 15 of the sliding film is tightly attached to the top surface of the box culvert, a rough surface 12 of the sliding film is arranged on the outer side, concrete on the top surface of the box culvert is polished to be smooth or a fixed steel plate is arranged on the surface of the concrete, after the other end of the sliding film bypasses a roller 9, the sliding film 8 is not paved in the box culvert 7, and the box culvert 7 can be timely paved on the top surface of the box culvert in the advancing process; when the jack 4 and the force transmission column 5 push the box culvert 7 forwards, the box culvert top plate 18 with the sliding film laid on the top surface drives the sliding film to enter the soil body 11 together, the sliding film is fully laid between the soil body 11 and the box culvert 7 gradually, the sliding film and the soil body 11 can be kept fixed due to the fact that the outer strength layer 141 of the sliding film is the rough surface 12 and the inner side is the sliding layer and the lubricating layer 15, the box culvert 7 and the sliding film can be displaced, and in the circulation process of the box culvert 7 pushing forwards, the sliding film can be continuously laid forwards, so that the soil body 11 and the box culvert 7 are separated by the sliding film, and the purposes of reducing the pushing resistance and reducing the disturbance of construction to the surrounding soil body 11 are achieved.
The embodiment also discloses a construction method for reducing the box culvert pushing disturbance, which adopts the box culvert pushing system for reducing the box culvert pushing disturbance to carry out construction.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "a" and "an" and "the" and similar referents used in the specification and claims of the present application are not to be construed to cover any order, quantity, or importance, but rather are used to distinguish between the various components. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
While the exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and adaptations can be made to the above-described specific embodiments and that various combinations of the features and structures can be made without departing from the scope of the present invention as defined in the appended claims.
Claims (8)
1. The sliding film is used for being configured between the outer wall of the box culvert and the soil body in the box culvert pushing process, and is characterized by comprising a bendable sliding film body, wherein one surface of the sliding film body adjacent to the soil body is a rough surface, and one surface of the sliding film body adjacent to the outer wall of the box culvert is a smooth surface;
the sliding film body comprises a strength layer and a smooth layer which are fixedly connected together, wherein one surface of the strength layer exposed outwards is a rough surface, and one surface of the smooth layer exposed outwards is a smooth surface;
the strength layer is provided in a woven mesh shape, and the smooth layer is provided in a thin plate shape or a film shape.
2. The slip film for reducing box culvert pushing disturbance of claim 1, wherein the strength layer is a metal mesh or a carbon fiber mesh, and the slip layer is a metal sheet or a carbon fiber film.
3. The slip film for reducing the pushing disturbance of a box culvert according to claim 1, wherein the strength layer and the smooth layer are connected in a welding or bonding or pressing mode.
4. The slip film for reducing box culvert pushing disturbance according to claim 1, wherein the slip film body is made of metal or carbon fiber, and is formed by one-time forging or one-time pressing.
5. The sliding film for reducing box culvert pushing disturbance according to claim 1, wherein a lubricating layer is further arranged on a smooth surface of the sliding film body, and the lubricating layer is a lubricating grease layer or a talcum powder layer.
6. The box culvert pushing system for reducing the box culvert pushing disturbance comprises a working well arranged below the ground of the side edge of an original line roadbed, wherein a back wall is arranged on the side edge of the working well opposite to the original line roadbed, a bottom sliding plate is arranged at the bottom of the working well, a prefabricated box culvert is arranged on the bottom sliding plate, a pushing device is arranged between the back wall and the box culvert, and the box culvert pushing system is characterized by further comprising any one of the sliding films in claims 1-5, a groove body perpendicular to the box culvert advancing direction is arranged behind a cutting edge at the front end of the outer wall of the box culvert, a roller is arranged in the groove body, one end of the sliding film is fixed on the back wall, the other end of the sliding film is paved on the outer wall of the box culvert along the box culvert pushing advancing direction, the sliding film before the roller is bypassed, the rough surface of the paved sliding film is contacted with the soil body outside the box culvert and can not slide relatively, the smooth surface paved sliding film is contacted with the outer wall of the box culvert and can slide relatively, the sliding film after bypassing the roller is unpaved film, and the sliding film is paved inside the box culvert; the outer wall of the box culvert is one or more of the top surface, the side surface and the bottom surface of the box culvert.
7. The culvert pushing system for reducing the disturbance of the pushing of the culvert of claim 6, wherein the outer wall of the culvert is provided with a smooth sliding surface or a steel plate.
8. A construction method for reducing the box culvert pushing disturbance, which is characterized in that the box culvert pushing system for reducing the box culvert pushing disturbance according to claim 6 or 7 is adopted for construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910102679.8A CN109667588B (en) | 2019-02-01 | 2019-02-01 | Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910102679.8A CN109667588B (en) | 2019-02-01 | 2019-02-01 | Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method |
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| CN109667588A CN109667588A (en) | 2019-04-23 |
| CN109667588B true CN109667588B (en) | 2024-03-26 |
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| CN201910102679.8A Active CN109667588B (en) | 2019-02-01 | 2019-02-01 | Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110219677A (en) * | 2019-06-11 | 2019-09-10 | 中国十七冶集团有限公司 | A kind of big section piping lane preliminary bracing cased arch construction method |
| CN114233310B (en) * | 2021-12-24 | 2024-06-28 | 济南市市政工程设计研究院（集团）有限责任公司 | Square culvert jacking construction device, system and method |
| CN114135326A (en) * | 2021-12-29 | 2022-03-04 | 上海同罡建筑工程有限公司 | Construction method and construction device for jacking box culvert |
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| JP2002332684A (en) * | 2001-05-08 | 2002-11-22 | Sumiken Concrete Kogyo Kk | Laying method for precast box culvert and moving method for concrete structure |
| CN106894350A (en) * | 2017-02-13 | 2017-06-27 | 中交隧道工程局有限公司 | A kind of steel basil is buried jacking box culvert device and construction method |
| CN206845184U (en) * | 2017-06-22 | 2018-01-05 | 中建五局土木工程有限公司 | A kind of box culvert advancing damping device |
| CN207582518U (en) * | 2017-11-15 | 2018-07-06 | 四川佳世特橡胶有限公司 | A kind of prefabricated pipe gallery self-lubricating sealing strip |
| CN209457938U (en) * | 2019-02-01 | 2019-10-01 | 驻马店市公路工程开发有限公司 | Reduce the synovial membrane and box culvert pushing tow system of the disturbance of box culvert pushing tow |
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2019
- 2019-02-01 CN CN201910102679.8A patent/CN109667588B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002332684A (en) * | 2001-05-08 | 2002-11-22 | Sumiken Concrete Kogyo Kk | Laying method for precast box culvert and moving method for concrete structure |
| CN106894350A (en) * | 2017-02-13 | 2017-06-27 | 中交隧道工程局有限公司 | A kind of steel basil is buried jacking box culvert device and construction method |
| CN206845184U (en) * | 2017-06-22 | 2018-01-05 | 中建五局土木工程有限公司 | A kind of box culvert advancing damping device |
| CN207582518U (en) * | 2017-11-15 | 2018-07-06 | 四川佳世特橡胶有限公司 | A kind of prefabricated pipe gallery self-lubricating sealing strip |
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| CN109667588A (en) | 2019-04-23 |
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