CN213654873U - Shallow buried underground tunnel waterproof structure - Google Patents
Shallow buried underground tunnel waterproof structure Download PDFInfo
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- CN213654873U CN213654873U CN202022345630.6U CN202022345630U CN213654873U CN 213654873 U CN213654873 U CN 213654873U CN 202022345630 U CN202022345630 U CN 202022345630U CN 213654873 U CN213654873 U CN 213654873U
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Abstract
The application relates to a shallow-buried underground excavation tunnel waterproof structure, which belongs to the technical field of tunnel construction waterproofing and comprises a waterproof coiled material and a water stop belt, wherein the waterproof coiled material is positioned between a primary support and a secondary lining; the edge part of the waterproof board is welded with the geotextile, and the middle part of the waterproof board is bonded with the geotextile by the adhesive layer. This application adopts the mode of edge weld, middle part bonding to connect geotechnological cloth and waterproof board, can enough guarantee joint strength, appears leaking the problem of welding again when having avoided the complete weld.
Description
Technical Field
The application relates to the waterproof field of tunnel construction, especially relates to a shallow secret tunnel waterproof construction that digs that buries.
Background
At present, the shallow-buried underground excavation method is a construction method for constructing a tunnel portal section of a mountain tunnel, an urban underground railway and other construction methods suitable for shallow-buried underground engineering in a weak surrounding rock shallow-buried stratum. It is suitable for the quaternary strata such as soil which is not suitable for open cut construction or soft non-cemented sand, pebble and the like; the design and construction of the tunnel are carried out according to the eighteen-character principle (namely pipe advancing, tight grouting, short excavation, strong supporting, quick closing and duty measurement) by taking a grid (or other steel structures) and a spray anchor as primary supporting means and following most principles of the 'New Austrian method'.
The tunnel is built by composite lining, so the waterproof treatment is needed to be carried out on the surface of the primary support after the primary support of the tunnel is finished and before the secondary lining construction, and the waterproof material generally adopts waterproof coiled materials (EVA and PVC) plus geotextile or non-woven fabric.
The current chinese utility model patent that the bulletin number is CN210977525U of granting discloses a waterproof board for tunnel waterproofing, fixed part including uplift and horizontal structure, the fixed part is located the both sides of uplift, the uplift with penetrate the nail position and correspond, the fixed part is smooth curve structure with the junction of uplift, the upper surface and the lower surface of fixed part all are equipped with the arch, the upper surface corresponds with the arch of adjacent lower surface and is connected, the protruding symmetry setting of corresponding position on the fixed part of both sides, bellied highly is less than the thickness of geotechnological cloth, the arch inserts in the geotechnological cloth.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: if only adopt the mode that the arch inserted geotechnological cloth to be connected between waterproof board and the geotechnological cloth, cause the joint strength of waterproof board and geotechnological cloth not enough easily for geotechnological cloth reduces waterproof board's fixed and guard action.
SUMMERY OF THE UTILITY MODEL
In order to guarantee joint strength between geotechnique's cloth and the waterproof board, this application provides a shallow secret tunnel waterproof construction that digs that buries.
The application provides a shallow secret tunnel waterproof construction that digs that buries adopts following technical scheme:
a shallow-buried underground excavation tunnel waterproof structure comprises a waterproof coiled material and a water stop belt, wherein the waterproof coiled material is positioned between a primary support and a secondary lining, the water stop belt is positioned in a construction joint of the secondary lining, and the waterproof coiled material comprises geotextile fixed on the primary support and a waterproof plate positioned on one side, close to the secondary lining, of the geotextile; the edge part of the waterproof board is welded with the geotextile, and the middle part of the waterproof board is bonded with the geotextile by the adhesive layer.
Through adopting above-mentioned technical scheme, the geotechnological cloth and the waterproof board between just propping up and two linings adopt two kinds of modes to connect, and the edge part of waterproof board is in the same place with the geotechnological cloth welding, and the intermediate part of waterproof board bonds with the geotechnological cloth together to it is inseparabler to make waterproof board and geotechnological cloth be connected, has improved joint strength, also can avoid appearing leaking when simply adopting traditional welding mode and weld and lead to connecting not firm problem.
Preferably, the length of the waterproof board is larger than the distance between two adjacent construction joints, and the adjacent waterproof boards are welded after being lapped at the construction joints.
Through adopting above-mentioned technical scheme, adopt the overlap joint mode to connect into a whole with single waterproof board to form waterproof barrier.
Preferably, the overlapping length of the waterproof sheet is not less than 1 m.
Through adopting above-mentioned technical scheme, effectively prevent concrete construction joint junction from leaking the infiltration.
Preferably, the waterproof board is an EVA plastic board with the thickness of 1-1.5 mm.
Through adopting above-mentioned technical scheme, guarantee the intensity of waterproof board, avoid in the work progress waterproof board damage and welding time damage because of intensity leads to inadequately.
Preferably, the geotextile is fixed on the primary support by using a shooting nail.
Through adopting above-mentioned technical scheme, make things convenient for geotechnological cloth's fixed.
Preferably, the geotextile and the waterproof board are adhered in a full adhesion mode.
By adopting the technical scheme, the connection between the geotextile and the waterproof board is tighter.
Preferably, the waterstop is a buried waterstop, and a joint filling material is arranged in the construction joint.
Through adopting above-mentioned technical scheme, the construction of well burying formula waterstop is simple, can play effectual water-proof effects.
Preferably, the caulking material is water-swellable rubber.
By adopting the technical scheme, the waterproof effect at the position of the second lining construction joint is further improved.
Preferably, the surface of the waterproof plate facing the geotextile is fixed with drainage convex strips arranged at intervals along the length direction of the tunnel, and the drainage convex strips are hollow and provided with through holes on the side wall.
Through adopting above-mentioned technical scheme, the infiltration between the first support and the waterproof board is discharged through the drainage sand grip, alleviates the water pressure of waterproof board department, avoids the waterproof board to damage.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the geotextile and the waterproof board are connected together in a welding and bonding mode, so that the connection strength between the geotextile and the waterproof board is ensured;
2. the waterproof board is arranged on one side of the primary support through the drainage convex strips, and the influence of overhigh water pressure on the waterproof board is avoided.
Drawings
Fig. 1 is a sectional view of a shallow-buried underground tunnel waterproof structure according to a first embodiment of the present application;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a schematic view illustrating a connection structure of a geotextile and a primary support of a waterproof structure of a shallow-buried underground tunnel according to an embodiment of the present application;
fig. 4 is a shallow-buried underground tunnel waterproof structure according to a second embodiment of the present application.
Description of reference numerals: 1. waterproof coiled materials; 11. geotextile; 12. a waterproof sheet; 13. a drainage ridge; 2. a water stop; 3. primary branch; 4. a second liner; 41. constructing a joint; 5. shooting a nail; 6. a gasket; 7. an adhesive layer; 8. a caulking material; 9. and (7) welding the parts.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
Example one
The embodiment of the application discloses shallow undercut tunnel waterproof construction that buries. Referring to fig. 1 and 2, the shallow-buried underground tunnel waterproof structure includes a waterproof roll 1 sandwiched between a primary support 3 and a secondary lining 4, and a water stop 2 disposed in a construction joint 41 of the secondary lining 4.
The waterproof coiled material 1 comprises geotextile 11 attached to the surface of the primary support 3 and waterproof board 12 attached to the surface of the secondary support 4. The waterproof sheet 12 is an EVA plastic sheet of 1.2mm thickness. The size of the flashing 12 matches the size of the geotextile 11. The geotextile 11 is mainly used for protecting and fixing the waterproof sheet 12.
One end of the geotextile 11 along the length direction of the tunnel is opposite to the construction joint 41 of the second lining 4, the other end of the geotextile 11 crosses the adjacent construction joint 41 and then is lapped with the adjacent geotextile 11, and the staggered distance between the geotextile 11 and the construction joint 41 is not less than 1m, which is beneficial to preventing water leakage at the joint of the concrete construction joint 41. And the lap joints of the geotextile 11 are welded.
The length of the geotextile 11 is larger than that between the adjacent construction joints 41, so that the geotextile 11 at the section to be constructed can be lapped after the secondary lining 4 at the construction section is poured.
The two ends of the waterproof boards 12 in the length direction of the tunnel are flush with the two ends of the geotextile 11, and the adjacent waterproof boards 12 are connected in a welding mode and welded with the geotextile 11 to form a welding part 9 after being lapped.
An adhesive layer 7 is arranged between the geotextile 11 and the waterproof board 12, and the adhesive layer 7 is used for bonding the geotextile 11 and the waterproof board 12 together, so that the connection strength between the geotextile 11 and the waterproof board 12 is improved. The geotextile 11 and the waterproof board 12 are adhered in a full adhesion mode.
The water stop 2 is a buried water stop, and can play a good waterproof effect on the construction joint 41. The construction joints 41 are also provided with caulking material 8.
Referring to fig. 3, the geotextile 11 is fixed on the primary support 3 by a plurality of shooting nails 5, and hollow gaskets 6 are arranged between the shooting nails 5 and the geotextile 11.
The implementation principle of the shallow tunnel waterproof structure that secretly digs that buries of this application embodiment is: after the primary support 3 of the tunnel is finished, laying the geotextile 11 on the surface of the primary support 3 and fixing the geotextile 11 on the primary support 3 by using the shooting nail 5; the length of the geotextile 11 is larger than that of the current construction section, and then the waterproof board 12 is adhered on the geotextile 11 and the edge part is welded with the geotextile 11; and finally, pre-burying the water stop band 2 at the construction joint 41 before pouring the secondary lining 4.
The geotextile 11 and the waterproof board 12 are connected in a mode of edge welding and middle bonding, so that the connection strength can be ensured, and the problem of welding leakage during complete welding is avoided.
Example two
The embodiment of the application discloses shallow undercut tunnel waterproof construction that buries. Referring to fig. 4, the difference from the first embodiment is that drainage ridges 13 fixed to the waterproof sheet 12 are provided at positions intermediate between the geotextile 11 and the waterproof sheet 12, and the drainage ridges 13 are provided at intervals in the longitudinal direction of the tunnel. The drainage ridge 13 is located at a position intermediate adjacent construction joints 41. The cambered surfaces of the drainage convex strips 13 face the geotextile 11. The drainage ridge 13 is hollow and has a through hole (not shown) in the sidewall.
The implementation principle of the shallow tunnel waterproof structure that secretly digs that buries of this application embodiment is: after the primary support 3 of the tunnel is finished, laying the geotextile 11 on the surface of the primary support 3 and fixing the geotextile 11 on the primary support 3 by using the shooting nail 5; the length of the geotextile 11 is larger than that of the current construction section, and then the waterproof plate 12 with the drainage convex strips 13 is adhered on the geotextile 11 and the edge is welded with the geotextile 11; and finally, pre-burying the water stop band 2 at the construction joint 41 before pouring the secondary lining 4.
Through setting up inside hollow drainage sand grip 13, can alleviate the influence of water pressure to waterproof board 12, avoid waterproof board 12 to damage.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a shallow secret tunnel waterproof construction that digs, is including being located waterproof roll (1) between first support (3) and two linings (4) and being located waterstop (2) in construction joint (41) of two linings (4), its characterized in that: the waterproof roll (1) comprises geotextile (11) fixed on the primary support (3) and a waterproof plate (12) positioned on one side of the geotextile (11) close to the secondary lining (4); the edge part of the waterproof board (12) is welded with the geotextile (11), and the middle part of the waterproof board is bonded with the geotextile (11) by the adhesive layer (7).
2. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the length of the waterproof board (12) is larger than the distance between two adjacent construction joints (41), and the adjacent waterproof boards (12) are welded after being lapped at the construction joints (41).
3. The shallow-buried undercut tunnel waterproof structure of claim 2, characterized in that: the overlapping length of the waterproof board (12) is not less than 1 m.
4. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the waterproof board (12) is an EVA plastic board with the thickness of 1-1.5 mm.
5. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the geotextile (11) is fixed on the primary support (3) by the shooting nail (5).
6. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the geotextile (11) and the waterproof board (12) are adhered in a full adhesion mode.
7. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the water stop (2) is a buried water stop, and joint filling materials (8) are arranged in the construction joints (41).
8. The shallow-buried undercut tunnel waterproof structure of claim 7, wherein: the joint filling material (8) is water-swelling rubber.
9. The shallow-buried undercut tunnel waterproof structure of claim 1, characterized in that: the waterproof board (12) is fixed with on the face towards geotechnological cloth (11) along tunnel length direction interval setting drainage sand grip (13), the through-hole has been seted up on the inside cavity of drainage sand grip (13) and the lateral wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345630.6U CN213654873U (en) | 2020-10-20 | 2020-10-20 | Shallow buried underground tunnel waterproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345630.6U CN213654873U (en) | 2020-10-20 | 2020-10-20 | Shallow buried underground tunnel waterproof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213654873U true CN213654873U (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022345630.6U Active CN213654873U (en) | 2020-10-20 | 2020-10-20 | Shallow buried underground tunnel waterproof structure |
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| CN (1) | CN213654873U (en) |
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- 2020-10-20 CN CN202022345630.6U patent/CN213654873U/en active Active
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