CN217998159U - Interim prefabricated retaining wall structure in tunnel - Google Patents
Interim prefabricated retaining wall structure in tunnel Download PDFInfo
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- CN217998159U CN217998159U CN202221216669.0U CN202221216669U CN217998159U CN 217998159 U CN217998159 U CN 217998159U CN 202221216669 U CN202221216669 U CN 202221216669U CN 217998159 U CN217998159 U CN 217998159U
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Abstract
The utility model belongs to the technical field of the road traffic component, specifically be the interim prefabricated retaining wall structure in tunnel. The utility model discloses a tunnel prefabricated barricade is for installing and removing the structure temporarily. A concave-convex groove is arranged at the corresponding position on the tunnel top plate; the lower part of the reinforced concrete temporary retaining wall is designed into a structure which can be embedded with the concave-convex groove on the tunnel top plate, and the temporary retaining wall is placed on the concave-convex groove on the tunnel top plate; a waterproof layer and a water swelling water stop strip for preventing water seepage are arranged between the tunnel top plate and the concave-convex groove at the lower part of the temporary retaining wall; steel plates with holes are respectively arranged at the positions corresponding to the concave-convex grooves on the two sides of the temporary retaining wall, and the reinforced concrete temporary retaining wall is fixed by bolts and nuts through the steel plates; and two adjacent prefabricated temporary retaining walls are connected in a mortise and tenon structure mode. The temporary retaining wall is prefabricated in factories and has reliable quality; the assembly and disassembly are convenient, the device can be repeatedly used, and the device is energy-saving and environment-friendly; the tunnel roof structure is not damaged when demolishing, avoids forming the infiltration passageway.
Description
Technical Field
The utility model belongs to the technical field of the road traffic component, concretely relates to temporary barricade structure in tunnel.
Background
When a tunnel is excavated at a traffic intersection, construction is generally divided into two stages in order to ensure normal traffic of the road during construction. In the first stage, one half of the road junction is constructed, and the other half of the road junction is used as traffic passage during construction; and after the first-stage construction is finished, the traffic is changed to the finished intersection, and then the rest intersection part is constructed.
Covering soil above a tunnel top plate finished by the first-stage construction of the intersection for social vehicles to pass, and excavating a foundation pit at the other side of the intersection; when the second-stage tunnel structure is constructed, a concrete temporary retaining wall is arranged above the tunnel roof for ensuring that the first-stage roof is covered with soil and does not slide. The conventional practice of such temporary retaining walls is:
(1) Synchronously pouring a tunnel top plate and a temporary retaining wall;
(2) Backfilling one side of the temporary retaining wall, paving a temporary road surface, and opening road traffic;
(3) Excavating a tunnel foundation pit on the other side of the temporary retaining wall, and constructing a tunnel structure;
(4) After the tunnel structure is finished, the temporary retaining wall is removed by filling soil and excavating, tools such as a percussion drill are adopted to remove the temporary retaining wall, and the traffic is recovered by covering soil.
After tunnel structure finally accomplished, for guaranteeing the current of pipeline under the road, the interim barricade in tunnel must be dug and removed, chisels and removes the in-process, very easily destroys tunnel roof structure, and interim barricade reinforcing bar is dug out simultaneously and is cut off the back, because the protective layer destroys, very easily corrodes, forms the passageway of leaking.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design a install and remove convenience, and do not damage the prefabricated barricade structure of tunnel interim of trading tunnel roof structure.
The utility model relates to a temporary prefabricated retaining wall for tunnel, which is a detachable structure, in particular to a concave-convex groove arranged at the corresponding position on the pre-cast tunnel roof; the lower part of the prefabricated reinforced concrete temporary retaining wall is designed into a structure which is embedded with a concave-convex groove on a tunnel top plate and is placed on the concave-convex groove of the tunnel top plate; a waterproof layer and a water-swelling water stop strip for preventing water seepage are arranged between the concave-convex groove of the tunnel top plate and the concave-convex groove at the lower part of the temporary retaining wall; steel plates with holes are respectively arranged at the positions corresponding to the concave-convex grooves on the two sides of the temporary retaining wall, and the reinforced concrete temporary retaining wall is fixed by bolts and nuts through the steel plates, as shown in fig. 4 and 5; two adjacent prefabricated temporary retaining walls are connected in a mortise and tenon structure mode, and the mortise and tenon structure mode is shown in figure 6.
The utility model discloses a prefabricated barricade temporarily, concrete construction step is:
(1) A concave-convex groove is formed in the top plate of the pouring tunnel, and a preformed hole (PVC pipe) is formed in the concave-convex groove for a bolt to pass through, so that the bolt is convenient to install and disassemble at the later stage;
(2) Brushing waterproof paint at the interface of the concave-convex groove, and arranging a water stop strip which expands when meeting water;
(3) The prefabricated reinforced concrete temporary retaining wall can be embedded with the concave-convex groove of the tunnel top plate in a concave-convex groove mode at the lower part, and a reserved hole (PVC pipe) is formed in the corresponding position for a bolt to pass through, so that the bolt is convenient to install and disassemble in the later period; placing the reinforced concrete temporary retaining wall on a concave-convex groove of a tunnel top plate, installing perforated steel plates on two sides, penetrating bolts through the steel plate perforated holes and the preformed holes, and screwing down by using nuts to fix the reinforced concrete temporary retaining wall;
(4) Backfilling one side of the temporary retaining wall, paving a temporary road surface, and opening road traffic;
(5) Excavating a tunnel foundation pit on the other side of the temporary retaining wall, and constructing a tunnel structure;
(6) After the tunnel structure is finished, the temporary retaining wall is filled with soil and excavated, screw nuts for fixing the temporary retaining wall are unscrewed, the prefabricated temporary retaining wall is dismounted, and the traffic is recovered by covering soil.
The utility model discloses a prefabricated barricade of tunnel interim has following advantage:
(1) The temporary retaining wall can be prefabricated in a factory, and the quality is reliable; the steel wire rope is assembled on site, disassembled after use and transported to the next project for recycling, so that the steel wire rope is energy-saving and environment-friendly;
(2) The temporary retaining wall is connected with the tunnel top plate through the embedded steel plate and the bolts, so that the structure is not damaged during dismantling, and a water seepage channel is not formed;
(3) The temporary retaining wall is designed in a modular mode, different sizes can be spliced through different modules, and the temporary retaining wall is suitable for different projects. Is flexible and convenient;
(4) The reinforced concrete structure does not need to be mechanically chiseled, and the noise and the dust pollution are reduced.
Drawings
Fig. 1 is a basic structure diagram of a conventional temporary retaining wall of a tunnel.
Fig. 2 is a detailed structure diagram of a conventional temporary retaining wall of a tunnel.
Fig. 3 is the utility model relates to a tongue and groove structure on tunnel roof.
Fig. 4 is a diagram of the cooperation of the tongue and groove structure on the temporary prefabricated retaining wall and the tunnel top plate of the utility model.
Fig. 5 is a vertical view of the structure of the concave-convex groove on the temporary prefabricated retaining wall and the tunnel top plate.
Fig. 6 is a plan view of the temporary prefabricated retaining wall designed by the present invention.
Reference numbers in the figures: the method comprises the following steps of 1, a tunnel top plate, 2, a temporary retaining wall, 3, a concave-convex groove on the tunnel top plate, 4, a concave-convex groove at the lower part of the temporary prefabricated retaining wall, 5, a preformed hole (PVC pipe), 6, a steel plate, 7, a bolt and 8, wherein the waterproof coating and the expansion water stop strip are respectively arranged on the two sides of the temporary prefabricated retaining wall; 9 is retaining wall reinforcing steel bar, 10 is the chisel line.
Detailed Description
The structure and construction of the present invention will be further described by a specific engineering example.
The tunnel has a total length of 2015m, wherein the buried segment 1545m is 470m, and the two open segments are long tunnels. The tunnel construction scale is bidirectional 6 lanes, the design vehicle speed is 80km/h, the main structure buried section is a double-hole rectangular cast-in-place concrete structure (a single-hole three-lane), and the open section is a U-shaped structure; and (4) open excavation construction, namely, passing through three municipal roads and a river. The part of the lower passing municipal road is constructed by road turnover, a tunnel temporary prefabricated retaining wall needs to be arranged, foundation pit construction is carried out on one side of the retaining wall, and social traffic vehicles pass through the other side of the retaining wall.
The tunnel total width is 32.5m, the tunnel temporary retaining wall adopts two length modules of 1.5m and 2.0m, 1.5X19+2.0X2=32.5m, 21 tunnel temporary retaining walls are totally adopted, the tunnel temporary retaining wall is completed in a project component processing factory shed beside the tunnel and is pre-assembled, the precision requirement of the components is ensured, after a concave-convex groove above a tunnel top plate is completed, the tunnel temporary retaining wall is directly pulled to a project site (within the range of 500 m), under the matching of hoisting machinery and manual work, the assembly is rapidly completed, the installation of waterproof paint and expansion water stop strips in the concave-convex groove is synchronously completed, after the tunnel structure of the intersection is completed, the tunnel temporary retaining wall bolts are loosened, and the retaining wall is disassembled and transported to the next intersection for the same installation. The tunnel temporary retaining wall is prefabricated in a processing plant, has reliable quality and can be repeatedly utilized, and is energy-saving and environment-friendly; the structure is not damaged during the dismantling process, and a water seepage channel cannot be formed; the modular design can be flexibly applied to any project; the reinforced concrete structure does not need to be mechanically chiseled, and the noise and the dust pollution are reduced.
Claims (1)
1. A temporary prefabricated retaining wall structure for a tunnel is characterized by being in a detachable form; specifically, a concave-convex groove is arranged at a corresponding position on a pre-cast tunnel top plate; the lower part of the prefabricated reinforced concrete temporary retaining wall is designed into a structure capable of being embedded with a concave-convex groove on a tunnel top plate, and the temporary retaining wall is placed on the concave-convex groove of the tunnel top plate; a waterproof layer and a water-swelling water stop strip for preventing water seepage are arranged between the concave-convex groove of the tunnel top plate and the concave-convex groove at the lower part of the temporary retaining wall; steel plates with holes are respectively arranged at the positions corresponding to the concave-convex grooves on the two sides of the temporary retaining wall, and the reinforced concrete temporary retaining wall is fixed by bolts and nuts through the steel plates; and two adjacent prefabricated temporary retaining walls are connected in a mortise and tenon structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221216669.0U CN217998159U (en) | 2022-05-18 | 2022-05-18 | Interim prefabricated retaining wall structure in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221216669.0U CN217998159U (en) | 2022-05-18 | 2022-05-18 | Interim prefabricated retaining wall structure in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217998159U true CN217998159U (en) | 2022-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221216669.0U Active CN217998159U (en) | 2022-05-18 | 2022-05-18 | Interim prefabricated retaining wall structure in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217998159U (en) |
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2022
- 2022-05-18 CN CN202221216669.0U patent/CN217998159U/en active Active
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