CN217462167U - Water plugging structure for tunnel portal of shield segment - Google Patents
Water plugging structure for tunnel portal of shield segment Download PDFInfo
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- CN217462167U CN217462167U CN202121404602.5U CN202121404602U CN217462167U CN 217462167 U CN217462167 U CN 217462167U CN 202121404602 U CN202121404602 U CN 202121404602U CN 217462167 U CN217462167 U CN 217462167U
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Abstract
The utility model provides a structure for blocking water of a shield segment tunnel portal, wherein an annular interface is formed between a shield segment and a station main body, and comprises a shield segment pre-buried steel plate and a station inner lining wall pre-buried steel plate, wherein the shield segment pre-buried steel plate is arranged at the back of the shield segment, the station inner lining wall pre-buried steel plate is arranged at one side of the station main body facing the shield segment pre-buried steel plate; the shield structure is characterized in that a water blocking steel plate capable of sealing a structural construction joint is welded between the shield segment embedded steel plate and the station inner lining wall embedded steel plate, reinforced concrete is poured in a closed area formed by the shield segment embedded steel plate, the station inner lining wall embedded steel plate and the water blocking steel plate, and an anchoring steel bar and a circumferential stiffening plate are welded at the joint of the shield segment embedded steel plate and the reinforced concrete. The structure for blocking water of the shield segment tunnel portal can improve the water blocking quality, and ensures that the post-cast strip concrete does not have the quality defects of water leakage and the like after the tunnel portal is blocked.
Description
Technical Field
The utility model relates to a track traffic engineering construction technical field especially relates to a structure of shield tunnel segment portal water shutoff.
Background
In the underground engineering construction of urban rail transit, the optimization of design, the improvement of material performance and the improvement of construction technology enable a waterproof system to be more and more perfect, and meanwhile, the durability of the structure is also improved; however, the waterproof performance of the interface between the regional tunnel and the station is a major difficulty of the waterproof performance of the subway engineering, and although the regional segment at the tunnel entrance requires full-ring caulking, the structure is often leaked or even repeatedly leaked due to various unstable factors when the shield enters or exits the tunnel.
In the existing waterproof structure of the shield tunnel and station interface, the water is isolated by repeatedly grouting a structural construction joint reserved at the interface through an embedded grouting pipe, a drainage ditch is arranged on the end face of a ring beam to drain the seeped water, however, a plurality of leakage points still often appear at the interface of the tunnel and the station in an actual operation line, the seeped water cannot well flow out from the drainage ditch from the top, the water seepage at the bottom plate position often seeps into the track bed position, the size of the drainage ditch is small, the construction difficulty is large, the post-pouring is usually carried out or not carried out, and the construction joint exists after the post-pouring; in addition, the water that will ooze through the drainage is discharged, and after long-term the use, the width in the route of water seepage flow probably increases gradually, makes in the unable inflow escape canal of water easily, leads to the inside of water seepage to the station, and water-proof effects is poor, and the construction degree of difficulty is big.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that a shield constructs structure that section of jurisdiction portal stifled water is provided, improves stifled water quality, ensures portal shutoff back, and quality defects such as percolating water can not appear in post-cast strip concrete.
In order to solve the technical problem, the utility model provides a water plugging structure for a shield segment tunnel portal, wherein an annular interface is formed between a shield segment and a station main body, and comprises a shield segment pre-embedded steel plate and a station inner lining wall pre-embedded steel plate, the shield segment pre-embedded steel plate is arranged at the back of the shield segment, and the station inner lining wall pre-embedded steel plate is arranged at one side of the station main body facing the shield segment pre-embedded steel plate;
the welding has the water shutoff steel sheet that can be with structure construction joint confined between shield structure section of jurisdiction pre-buried steel sheet and the station interior bush wall pre-buried steel sheet, shield structure section of jurisdiction pre-buried steel sheet the station interior bush wall pre-buried steel sheet with the closed area that water shutoff steel sheet encloses has been pour reinforced concrete, shield structure section of jurisdiction pre-buried steel sheet with reinforced concrete junction welding anchor reinforcing bar and hoop stiffening plate.
In a preferred embodiment: the water plugging steel plate is an arc-shaped plate, the radian of the water plugging steel plate is matched with the arc of the plugging position, and the water plugging steel plate is divided into a plurality of steel plates.
In a preferred embodiment: when the station is the open cut station, be equipped with the waterproof layer between station main part and the envelope, the waterproof layer is close to structural construction seam department is equipped with the waterstop, the waterstop is close to structural construction seam's one end is equipped with the mouth of contracting and glues.
In a preferred embodiment: when the station is for secretly digging the station, be equipped with the PVC waterproof board between station main part and the first support, the PVC waterproof board is close to structural construction seam department is equipped with the waterstop, the waterstop is close to structural construction seam's one end is equipped with the receipts mouth and glues.
In a preferred embodiment: and two lining mold waterproof concrete, a PVC waterproof board and sprayed concrete are arranged between the station main body and the primary support.
In a preferred embodiment: the shield segment pre-buried steel plate is provided with a pouring opening for pouring reinforced concrete into a closed area surrounded by the shield segment pre-buried steel plate, the station inner lining wall pre-buried steel plate and the water plugging steel plate.
In a preferred embodiment: the shield segment embedded steel plate is also provided with grouting holes for grouting and water plugging.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
the utility model provides a shield constructs structure of section of jurisdiction portal blocking water, through the setting of shield constructs section of jurisdiction pre-buried steel sheet, the pre-buried steel sheet of interior welt in station and the blocking water steel sheet, keep apart the outside at structural construction joint completely with water, make the inside that water can not the seepage get into the station, rethread slip casting steel pipe is to structural construction joint slip casting, with the crowded station main part of keeping away from of log raft, water-proof effects is good. The water blocking structure for the tunnel portal of the shield segment solves the problem of waterproof performance of starting (reaching) annular tunnel portal blocking, improves the blocking quality of the tunnel portal of the segment, and reduces the cost of later repair.
Drawings
FIG. 1 is a schematic construction diagram of the preferred embodiment of the present invention;
fig. 2 is a top view of a shield segment pre-buried steel plate in the preferred embodiment of the present invention;
fig. 3 is a side view of a shield segment pre-buried steel plate in the preferred embodiment of the present invention;
fig. 4 is a cross-sectional view of a shield segment and a pre-buried steel plate in the preferred embodiment of the present invention.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounting," "providing," "sleeving/connecting," "connecting," and the like are used in a broad sense, and for example, "connecting" may be wall-mounted, detachable, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.
Referring to fig. 1 to 4, the embodiment provides a structure for blocking water in a tunnel portal of a shield segment, an annular interface is formed between the shield segment and a station main body, and the structure comprises a shield segment pre-embedded steel plate 1 and a station lining wall pre-embedded steel plate 2, the shield segment pre-embedded steel plate 1 is arranged on the back of the shield segment 3, and the station lining wall pre-embedded steel plate 2 is arranged on one side of the station main body facing the shield segment pre-embedded steel plate 1;
the welding has between shield structure section of jurisdiction embedded steel plate 1 and the station interior bush wall embedded steel plate 2 can be with the closed water shutoff steel sheet 4 of structure construction joint, shield structure section of jurisdiction embedded steel sheet 1 the station interior bush wall embedded steel sheet 2 with reinforced concrete has been pour to the closed area that water shutoff steel sheet 4 encloses, shield structure section of jurisdiction embedded steel sheet 1 with reinforced concrete junction welding anchor bar and hoop stiffening plate 5.
In this embodiment, in order to further improve the effect of shutoff, water shutoff steel sheet 4 is the arc, and the radian matches with the arc of shutoff position, falls into a plurality of steel sheets.
And the shield segment embedded steel plate 1 is provided with a pouring portal 11 for pouring reinforced concrete into a closed area surrounded by the shield segment embedded steel plate 1, the station lining wall embedded steel plate 2 and the water plugging steel plate 4.
In order to facilitate grouting and water plugging, the shield segment embedded steel plate 1 is further provided with grouting holes 12 for grouting and water plugging.
In this embodiment, when the station is the open cut station, be equipped with the waterproof layer between station main part and the envelope, the waterproof layer is close to structural construction joint department is equipped with the waterstop, the waterstop is close to structural construction joint's one end is equipped with the receipts mouth and glues. When the station is for secretly digging the station, be equipped with the PVC waterproof board between station main part and the first support, the PVC waterproof board is close to structural construction seam department is equipped with the waterstop, the waterstop is close to structural construction seam's one end is equipped with the receipts mouth and glues.
And two lining mold waterproof concrete, a PVC waterproof board and sprayed concrete are arranged between the station main body and the primary support.
Foretell structure that shield constructs 3 hole door water shutoff of section of jurisdiction through the setting of shield constructs section of jurisdiction pre-buried steel sheet 1, the pre-buried steel sheet of interior headwall 2 in station and water shutoff steel sheet 4, keeps apart water in the outside of structural construction joint completely, makes the inside that water can not the seepage get into the station, and the station main part is kept away from to the structural construction joint slip casting to the rethread slip casting steel pipe with the crowded, and water-proof effects is good. The structure of 3 tunnel portal water plugging of shield segment has solved the waterproof performance of originating (arriving) ring tunnel portal shutoff, improves segment tunnel portal shutoff quality, reduces the cost of later stage repair.
In the current domestic shield segment 3 portal initial (arrival) ring plugging construction, in order to ensure the safety and the water resistance of the tunnel, the shield segment 3 back grouting water plugging is firstly adopted, and then the portal post-pouring concrete plugging is constructed. However, the traditional construction method adopts a grouting water plugging mode, so that the effect is poor, quality defects such as water leakage of a tunnel portal and the like occur after post-pouring concrete construction is finished, and water leakage treatment is required in the later period.
And adopt foretell shield structure of 3 tunnel portals in section of jurisdiction stifled water, at the pre-buried steel sheet in section of jurisdiction back when the construction, recycle the steel sheet and weld the pre-buried steel sheet in the interior welt of station 2 with the pre-buried steel sheet in section of jurisdiction back, form closed space. By the method, the water plugging quality is improved, and the quality defects of water leakage and the like of post-cast strip concrete are avoided after the tunnel portal is plugged.
The above, only be the embodiment of the present invention, however, the design concept of the present invention is not limited to this, and any person skilled in the art is in the technical scope of the present invention, and it is right to utilize this concept to perform insubstantial changes, all belonging to the act of infringing the protection scope of the present invention.
Claims (7)
1. A structure for blocking water of a shield segment tunnel portal is characterized by comprising a shield segment embedded steel plate and a station inner lining wall embedded steel plate, wherein the shield segment embedded steel plate is arranged on the back of a shield segment;
the shield structure is characterized in that a water blocking steel plate capable of sealing a structural construction joint is welded between the shield segment embedded steel plate and the station inner lining wall embedded steel plate, reinforced concrete is poured in a closed area formed by the shield segment embedded steel plate, the station inner lining wall embedded steel plate and the water blocking steel plate, and an anchoring steel bar and a circumferential stiffening plate are welded at the joint of the shield segment embedded steel plate and the reinforced concrete.
2. The structure for blocking water in the tunnel portal of the shield segment according to claim 1, which is characterized in that: the water plugging steel plate is an arc-shaped plate, and the radian is matched with the arc shape of the plugging position and is divided into a plurality of steel plates.
3. The structure for blocking water in the tunnel portal of the shield segment according to claim 1, which is characterized in that: when the station is the open cut station, be equipped with the waterproof layer between station main part and the envelope, the waterproof layer is close to structural construction seam department is equipped with the waterstop, the waterstop is close to structural construction seam's one end is equipped with the mouth of contracting and glues.
4. The structure for blocking water in the tunnel portal of the shield segment according to claim 1, which is characterized in that: when the station is for secretly digging the station, be equipped with the PVC waterproof board between station main part and the first support, the PVC waterproof board is close to structural construction seam department is equipped with the waterstop, the waterstop is close to structural construction seam's one end is equipped with the receipts mouth and glues.
5. The structure of shield segment tunnel portal water shutoff according to claim 4, characterized in that: and two lining mold waterproof concrete, a PVC waterproof board and sprayed concrete are arranged between the station main body and the primary support.
6. The structure for blocking water in the tunnel portal of the shield segment according to claim 1, which is characterized in that: the shield segment pre-buried steel plate is provided with a pouring opening for pouring reinforced concrete into a closed area surrounded by the shield segment pre-buried steel plate, the station inner lining wall pre-buried steel plate and the water plugging steel plate.
7. The structure of shield segment tunnel portal water shutoff according to claim 6, characterized in that: the shield segment pre-buried steel plate is also provided with grouting holes for grouting and water plugging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121404602.5U CN217462167U (en) | 2022-06-29 | 2022-06-29 | Water plugging structure for tunnel portal of shield segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121404602.5U CN217462167U (en) | 2022-06-29 | 2022-06-29 | Water plugging structure for tunnel portal of shield segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217462167U true CN217462167U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121404602.5U Active CN217462167U (en) | 2022-06-29 | 2022-06-29 | Water plugging structure for tunnel portal of shield segment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217462167U (en) |
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2022
- 2022-06-29 CN CN202121404602.5U patent/CN217462167U/en active Active
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