CN215486069U - Operation shield tunnel section of jurisdiction restoration structure after being punctured by external force - Google Patents
Operation shield tunnel section of jurisdiction restoration structure after being punctured by external force Download PDFInfo
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- CN215486069U CN215486069U CN202122067852.0U CN202122067852U CN215486069U CN 215486069 U CN215486069 U CN 215486069U CN 202122067852 U CN202122067852 U CN 202122067852U CN 215486069 U CN215486069 U CN 215486069U
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Abstract
The utility model relates to an operation shield tunnel segment repairing structure after being broken through by external force, which comprises a punching hole, wherein a temporary plugging plate is arranged on the inner side wall of a tunnel segment, a temporary vertical shaft is arranged above the tunnel segment, and a protective wall is arranged on the side wall of the temporary vertical shaft; concrete reinforcing layers are arranged inside the punched hole and at the upper end opening, a newly-added reinforcing mesh is arranged in the concrete reinforcing layer, and the newly-added reinforcing mesh is connected with original reinforcing steel bars inside the tunnel segment; the bottom of the temporary vertical shaft is filled with a plain concrete layer, the plain concrete layer is covered with a concrete reinforcing layer, and a backfill layer is arranged above the plain concrete layer. Utilize interim shutoff board to carry out the shutoff to hitting the hole, prevent to hit the hole and leak, the tunnel can resume the operation, does not need long-time outage, reduces economic loss. Through setting up newly-increased reinforcing bar net, concrete strengthening layer, plain concrete layer etc for the shield tunnel after the restoration satisfies structure atress, waterproof and durability requirement, guarantees the restoration effect.
Description
Technical Field
The utility model relates to the technical field of tunnel maintenance, in particular to an operation shield tunnel segment repair structure after being punctured by external force.
Background
The shield method occupies more than 90% of the total length of the tunnel between urban rail sections by the advantage that the shield method has the minimum influence on urban environment. Therefore, the modern urban underground space is also distributed with a considerable scale of operating urban rail shield tunnel networks besides the municipal pipe network.
Due to various reasons, more engineering accidents that the shield tunnel of the urban rail is punctured (damaged) in the construction process of civil engineering of cities because of the operation processes of ground exploration drilling, foundation pit dewatering wells, pile foundation construction and the like appear, the accidents directly influence the operation safety of the urban rail, and some even directly cause the operation line of the urban rail to stop.
How to carry out interim restoration to the shield tunnel section of jurisdiction that is punctured in short time, under the prerequisite of guaranteeing that urban rail transit line does not stop the operation or resume the operation as early as possible, carry out quick, effectual restoration to the shield tunnel section of jurisdiction that is punctured from the tunnel outside, have important meaning.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide an operation shield tunnel segment repairing structure after being punctured by external force, which can temporarily plug the punctured shield segment in a short time, quickly and effectively repair the punctured shield segment from the outer side of the tunnel on the premise of ensuring that an urban rail traffic line does not stop running or recovers the operation as soon as possible, and the repaired shield tunnel meets the requirements of structural stress, water resistance and durability.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the operation shield tunnel segment repairing structure after being punctured by external force comprises a punching hole in a tunnel segment, wherein a temporary plugging plate for covering a lower port of the punching hole is arranged on the inner side wall of the tunnel segment, a temporary vertical shaft is arranged above the tunnel segment, the punching hole is positioned in the center of the lower end of the temporary vertical shaft, and a protective wall is arranged on the side wall of the temporary vertical shaft; concrete reinforcing layers are arranged inside the punched hole and at the upper end port, a newly-added reinforcing mesh is arranged in the concrete reinforcing layer, and the newly-added reinforcing mesh is connected with original reinforcing steel bars inside the tunnel segment; the bottom of the temporary vertical shaft is filled with a plain concrete layer, the plain concrete layer is covered with a concrete reinforcing layer, and a backfill layer is arranged above the plain concrete layer.
Further, the backfill layer comprises an clay layer and a common backfill layer which are sequentially arranged from bottom to top.
Further, a plurality of dewatering wells are arranged around the temporary vertical shaft.
Further, a plurality of ground grouting pipes are arranged around the temporary vertical shaft.
Furthermore, the outer wall of the concrete reinforcing layer outside the punched hole is provided with a waterproof coating layer.
Furthermore, the outer wall of the tunnel segment around the upper port of the punching hole is provided with a sealing adhesive layer.
Furthermore, an interface agent layer is arranged between the concrete reinforcing layer and the inner wall of the punched hole.
Further, the top of the temporary vertical shaft is provided with a locking collar beam.
Further, the lower end of the temporary vertical shaft is expanded outwards to form an expansion cavity, and fine stone epoxy concrete is filled in the expansion cavity.
Further, the temporary plugging plate is a steel plate, and a grouting layer is arranged between the steel plate and the tunnel segment.
The utility model has the beneficial effects that: utilize interim shutoff board to carry out the shutoff to hitting the hole, prevent to hit the hole and leak, the tunnel can resume the operation, does not need long-time outage, reduces economic loss. Then, the punctured shield segments are quickly and effectively repaired from the outer side of the tunnel, and the operation of the tunnel is not influenced. Through setting up newly-increased reinforcing bar net, concrete strengthening layer, plain concrete layer etc for the shield tunnel after the restoration satisfies structure atress, waterproof and durability requirement, guarantees the restoration effect.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an enlarged schematic view of a hole at which a hole is punched;
reference numerals: 1-locking collar beam; 2, protecting the wall; 3-clay layer; 4-plain concrete layer; 5-a concrete reinforcing layer; 7-waterproof coating layer; 8, sealing the adhesive layer; 9-temporary plugging plate; 11-dewatering well; 12-ground grouting pipe; 13-original steel reinforcement; 14-adding a reinforcing mesh; 15-tunnel segment; 17-a temporary shaft; 18-common backfill soil layer.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
As shown in fig. 1 and 2, the operation shield tunnel segment repair structure after being broken down by external force comprises a punching hole in a tunnel segment 15, wherein a temporary blocking plate 9 covering a lower port of the punching hole is arranged on the inner side wall of the tunnel segment 15, and the temporary blocking plate 9 is used for blocking water to prevent water in a soil layer outside the tunnel segment 15 from flowing into a tunnel through the punching hole. The temporary plugging plate 9 can be a plastic plate and the like, is bonded on the inner wall of the tunnel segment 15 through waterproof glue, and as an optimal implementation mode, the temporary plugging plate 9 adopts a steel plate, the shape of the steel plate is matched with the shape of the tunnel segment 15 at the punched hole, so that the steel plate can be attached to the inner side wall of the tunnel segment 15, and a grouting layer is arranged between the steel plate and the tunnel segment 15 for ensuring the waterproof effect. Through carrying out the shutoff at tunnel section of jurisdiction 15 inboard to hitting the hole, played the effect of leak protection water, avoided leaking the normal operating that influences the train, consequently, will hit hole lower port and seal the back, can resume the operation in tunnel, avoid the tunnel to shut down for a long time and cause the passenger to go on a journey inconveniently, and interim shutoff board 9's construction is very simple quick, can be so that tunnel section of jurisdiction 15 punctures the back and resume the operation fast.
Tunnel section of jurisdiction 15 top is provided with interim shaft 17, and interim shaft 17 is excavated from ground until reaching tunnel section of jurisdiction 15, hits the center that the hole is located interim shaft 17 lower extreme, guarantees to have sufficient operating space to repair hitting the hole, and the lateral wall of interim shaft 17 is provided with dado 2, plays the effect of protecting interim shaft 17 lateral wall, prevents to appear collapsing, improves the security of construction, plays the effect of prevention of seepage water simultaneously. The top of the temporary vertical shaft 17 is provided with the locking collar beam 1, so that the strength of the top of the temporary vertical shaft 17 is improved, external sundries are prevented from falling into the temporary vertical shaft 17, and the construction safety is further improved.
A plurality of dewatering wells 11 and ground grouting pipes 12 are arranged around the temporary vertical shaft 17. Before repair construction, mortar can be injected into the surrounding soil through the ground grouting pipe 12, so that the stratum lost after the pipe piece is punctured can be filled, the stratum is reinforced, and a certain water-resisting effect is achieved. Meanwhile, the precipitation well 11 can be used for precipitation, so that water in the stratum is prevented from permeating into the temporary vertical shaft 17.
And a concrete reinforcing layer 5 is arranged inside the punching hole and at the upper port, and an interfacial agent layer is arranged between the concrete reinforcing layer 5 and the inner wall of the punching hole. And a waterproof coating layer 7 is arranged on the outer wall of the concrete reinforcing layer 5 outside the punching hole. And a sealing adhesive layer 8 is arranged on the outer wall of the tunnel segment 15 around the upper port of the punching hole. And a newly-added reinforcing mesh 14 is arranged in the concrete reinforcing layer 5, and the newly-added reinforcing mesh 14 is connected with original reinforcing steel bars 13 in the tunnel segment 15. The construction of the concrete reinforcing layer 5 and the newly-added reinforcing mesh 14 is the key of the restoration of the punched hole, during the construction, the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole are cleaned firstly, then the brushing treatment is carried out on the side wall of the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole by using a steel wire brush, then the air drying is carried out on the side wall of the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole, then an interface agent is coated, the interface agent can be epoxy coating, the newly-added reinforcing mesh 14 is bound, the newly-added reinforcing mesh 14 is connected with the broken original reinforcing steel bars 13, after the newly-added reinforcing mesh 14 is bound, the fine stone epoxy concrete can be adopted for pouring, and the concrete reinforcing layer 5 is obtained inside the punched hole and at the upper port. After the punched hole is repaired by adopting the mode, the tunnel segment 15 meets the requirements of structural stress, water resistance and durability, and the repairing effect is good. The waterproof coating layer 7 and the sealing adhesive layer 8 can play a good waterproof role, and water in the surrounding stratum is prevented from permeating into the concrete reinforcing layer 5.
The construction process of the utility model is as follows:
1. grouting and blocking water from the position of the punched hole in the tunnel, and returning the tunnel to operation after the punched hole is blocked by adopting a temporary blocking plate 9;
2. mortar is injected into the surrounding soil through the ground grouting pipe 12 on the ground, so that the stratum lost after the duct piece is punctured can be filled, the stratum is reinforced, and a certain water-resisting effect is achieved;
3. using the precipitation well 11 to carry out precipitation to prepare a construction temporary shaft 17;
4. constructing a temporary vertical shaft 17 by adopting a reverse construction method according to the puncture position of the duct piece until the lower end of the temporary vertical shaft 17 reaches the tunnel duct piece 15;
5. cleaning the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole;
6. brushing the side wall of the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole by using a steel wire brush;
7. air-drying the side wall of the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole to ensure that the surface is dry;
8. coating an interface agent on the side wall of the punched hole and the outer wall of the tunnel segment 15 around the upper port of the punched hole, wherein the interface agent is an epoxy coating;
9. adopting new steel bars to reconnect the broken steel bars of the original pipe segments, and binding the reinforcing steel bars to obtain a newly added reinforcing mesh 14;
10. breaking the part of the lower end of the temporary vertical shaft 17 connected with the tunnel segment 15;
11. pouring a fine stone epoxy concrete into the punched hole and the space around the upper port of the punched hole to form a bottle stopper-shaped concrete reinforcing layer 5, and simultaneously pouring the space broken by the lower end of the temporary vertical shaft 17 in the step 10;
12. carrying out air drying operation on the outer surface of the concrete reinforcing layer 5;
13. after the surface of the concrete reinforcing layer 5 is initially solidified and has 60% strength, applying a waterproof coating layer 7, and closing by adopting a sealing glue layer 8;
14. backfilling plain concrete layer 4, clay layer 3 and common backfill soil layer 18.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Operation shield tunnel section of jurisdiction restoration structure after being punctureed by external force, including the hole of punching that is located tunnel segment (15), its characterized in that: a temporary plugging plate (9) covering a lower port of the punching hole is arranged on the inner side wall of the tunnel segment (15), a temporary vertical shaft (17) is arranged above the tunnel segment (15), the punching hole is positioned in the center of the lower end of the temporary vertical shaft (17), and a protective wall (2) is arranged on the side wall of the temporary vertical shaft (17); a concrete reinforcing layer (5) is arranged inside the punching hole and at the upper port, a newly-added reinforcing mesh (14) is arranged in the concrete reinforcing layer (5), and the newly-added reinforcing mesh (14) is connected with original reinforcing steel bars (13) inside the tunnel segment (15); the bottom of the temporary vertical shaft (17) is filled with a plain concrete layer (4), the plain concrete layer (4) covers the concrete reinforcing layer (5), and a backfill layer is arranged above the plain concrete layer (4).
2. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: the backfill layer comprises an clay layer (3) and a common backfill layer (18) which are sequentially arranged from bottom to top.
3. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: a plurality of dewatering wells (11) are arranged around the temporary vertical shaft (17).
4. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: and a plurality of ground grouting pipes (12) are arranged around the temporary vertical shaft (17).
5. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: and a waterproof coating layer (7) is arranged on the outer wall of the concrete reinforcing layer (5) outside the punching hole.
6. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: and a sealing adhesive layer (8) is arranged on the outer wall of the tunnel segment (15) around the upper port of the punching hole.
7. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: and an interfacial agent layer is arranged between the concrete reinforcing layer (5) and the inner wall of the punched hole.
8. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: and the top of the temporary vertical shaft (17) is provided with a locking collar beam (1).
9. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: the lower end of the temporary vertical shaft (17) is expanded outwards to form an expansion cavity, and fine stone epoxy concrete is filled in the expansion cavity.
10. The operation shield tunnel segment repair structure after being punctured by an external force according to claim 1, wherein: the temporary plugging plate (9) is a steel plate, and a grouting layer is arranged between the steel plate and the tunnel segment (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122067852.0U CN215486069U (en) | 2021-08-30 | 2021-08-30 | Operation shield tunnel section of jurisdiction restoration structure after being punctured by external force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122067852.0U CN215486069U (en) | 2021-08-30 | 2021-08-30 | Operation shield tunnel section of jurisdiction restoration structure after being punctured by external force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215486069U true CN215486069U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122067852.0U Active CN215486069U (en) | 2021-08-30 | 2021-08-30 | Operation shield tunnel section of jurisdiction restoration structure after being punctured by external force |
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| Country | Link |
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| CN (1) | CN215486069U (en) |
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2021
- 2021-08-30 CN CN202122067852.0U patent/CN215486069U/en active Active
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