CN111779503A - Triple baffling type partition waterproof structure of underground excavation tunnel - Google Patents
Triple baffling type partition waterproof structure of underground excavation tunnel Download PDFInfo
- Publication number
- CN111779503A CN111779503A CN202010707195.9A CN202010707195A CN111779503A CN 111779503 A CN111779503 A CN 111779503A CN 202010707195 A CN202010707195 A CN 202010707195A CN 111779503 A CN111779503 A CN 111779503A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- water
- waterproof layer
- secondary lining
- waterproof
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention provides a triple-barrier type partitioned waterproof structure of an underground excavated tunnel, which comprises a tunnel and a tunnel, wherein the tunnel adopts a composite lining consisting of a primary support, a waterproof layer and a secondary lining, a tunnel body is positioned in a weak permeability surrounding rock area and a strong permeability surrounding rock area, and the surrounding rock in a certain range outside a tunnel contour line is reinforced at the boundary of the strong permeability stratum and the weak permeability stratum by adopting radial grouting to construct a first water-blocking area; filling sealing materials between the primary support and the waterproof layer to construct a second water-blocking area; and (3) between the waterproof layer at the circumferential joint of the secondary lining and the secondary lining, adopting a water stop belt which is back-pasted on the waterproof layer and the surface bulges and is embedded into the secondary lining structure, and constructing a third water-blocking area. The invention enables users to realize subarea water prevention on the underground excavated tunnel under different development conditions of underground water more conveniently and efficiently, and facilitates the maintenance and the conservation of the tunnel in the operation period.
Description
Technical Field
The invention belongs to the field of tunnel structures, and particularly relates to a triple-barrier type partition waterproof structure of an underground excavated tunnel.
Background
In recent years, with the continuous improvement of the technical level, the length of a traffic tunnel is longer and longer, the tunnel is a tubular structure buried underground, the realization of the use function of the tunnel is inevitably influenced by factors such as engineering geology, hydrogeology and the like, the hydrogeology environment of the long tunnel along the longitudinal direction is often greatly different due to the influence of stratum lithology, geological structure and the like, and at the moment, the partition waterproof technology matched with the development characteristics of the underground water of different sections of a tunnel site area is usually adopted to control or reduce the longitudinal seepage of the underground water along the tunnel, so that the purposes of technical, economic and reasonable are achieved.
The common sectional waterproof method for the tunnel at present is to prevent water around the seam of the tunnel structure, paste or weld the waterstop or water-resisting rib perpendicular to the waterproof layer at the inner side of the tunnel waterproof layer along the circumferential seam of the structure, and form a whole with the mold concrete lining poured later by utilizing the self structural height and rigidity, thereby forming a waterproof partition around the lining seam, so that the water seepage entering the waterproof layer can only longitudinally flow in one mold lining between the adjacent waterstop or water-resisting rib, ensuring that when the water seepage occurs in the tunnel of a certain section, other sections cannot be influenced, and conveniently taking targeted treatment measures.
Engineering practices show that the waterproof effect of the tunnel is influenced by the fact that a waterproof separating ring which is tight and watertight is difficult to form between the primary support and the secondary lining due to the fact that a waterstop or a water-resisting rib of the waterproof separating unit is difficult to connect with the waterproof layer side; in addition, when high-pressure ground water in the ground layer continuously penetrates the waterproof layer and is kept in contact with the lining in one waterproof unit for a long time, a leakage problem may be generated, thereby affecting the use function of the tunnel.
Disclosure of Invention
The invention aims to provide a triple-barrier type partitioned waterproof structure of an underground excavated tunnel, which is particularly suitable for realizing partitioned waterproofing of the underground excavated tunnel under different development conditions of underground water by a user.
In order to solve the technical problems, the invention adopts the technical scheme that: the method comprises the steps that a tunnel adopts a composite lining consisting of a primary support, a waterproof layer and a secondary lining, a tunnel body is located in a weak permeability surrounding rock area and a strong permeability surrounding rock area, and surrounding rocks outside a tunnel contour line in a certain range are reinforced by adopting radial grouting at the boundary of the strong permeability stratum and the weak permeability stratum to construct a first water blocking area; filling sealing materials between the primary support and the waterproof layer to construct a second water-blocking area; and (3) between the waterproof layer at the circumferential joint of the secondary lining and the secondary lining, adopting a water stop belt which is back-pasted on the waterproof layer and the surface bulges and is embedded into the secondary lining structure, and constructing a third water-blocking area.
The preferred waterstop is a large thickness, high bulge, structural configuration.
Preferably, the waterproof layer is provided on the outer contour of the secondary lining, and the waterproof layer and the primary support member are provided with a filling material having a binder action.
The close adhesion between the primary support and the waterproof layer can be realized by adopting a method that a waterproof layer is laid along the outer contour of the secondary lining by a special laying trolley for the waterproof layer, and then filling materials with the function of binding agents are injected between the concave-convex surfaces between the waterproof layer and the primary support in a pressing mode.
The longitudinal reinforcing range of the radial grouting adopted by the first water blocking area is generally not less than the length of the one-mould secondary lining, and the radial reinforcing range is generally 5-8 m outside the excavation outline of the tunnel body.
Through the arrangement of the water blocking areas, a triple-barrier type partition waterproof structure system of the underground excavation tunnel structure is formed.
The invention has the advantages and positive effects that: by adopting the technical scheme, the user can realize the subarea water prevention of the underground excavated tunnel under different development conditions of underground water more conveniently and efficiently, and the maintenance and the curing of the tunnel in the operation period are facilitated, so that the construction safety is ensured, and the construction efficiency is improved; the invention has the advantages of simple structure, convenient maintenance, low processing cost and the like.
Drawings
FIG. 1 is a schematic structural view of a triple barrier type partitioned waterproofing system of an underground tunnel according to the present invention;
FIG. 2 is a schematic view of a partitioned waterproof node structure of a lining structure.
In the figure:
1. tunnel 2, first water-blocking area 3, secondary lining circumferential seam
4. Primary support 5, secondary lining 6, waterproof layer
61. Water stop 62, filler 7, weak permeability surrounding rock area
8. Surrounding rock area with strong permeability
Detailed Description
As shown in fig. 1 or 2, the invention relates to a triple-barrier type partitioned waterproof structure of an underground excavated tunnel, which comprises a tunnel 1, a weak permeability surrounding rock area 7 and a strong permeability surrounding rock area 8, wherein the tunnel 1 adopts a composite lining consisting of a primary support 4, a waterproof layer 6 and a secondary lining 5, the surrounding rocks in a certain range outside the contour line of the tunnel 1 are reinforced at the boundary of the strong permeability stratum and the weak permeability stratum by adopting radial grouting to construct a first water blocking area 2; filling sealing materials between the primary support 4 and the waterproof layer 6 to construct a second water-blocking area; and between the waterproof layer 6 at the circumferential seam 3 of the secondary lining and the secondary lining 5, adopting a water stop belt 61 which is back-adhered to the waterproof layer 6 and is embedded into the structure of the secondary lining 5 by the convex part on the face part to construct a third water-blocking area.
The preferred water stop 61 is a large thickness, high rise construction.
Preferably, the waterproof layer 6 is provided on the outer contour of the secondary lining 5, and the waterproof layer 6 and the preliminary bracing 4 are provided with a filler 62 having an adhesive action.
The longitudinal reinforcing range of the radial grouting adopted by the first water blocking area 2 is generally not less than the length of the one-mould secondary lining 5, and the radial reinforcing range is generally 5 m-8 m outside the excavation outline of the tunnel body 1.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (3)
1. The utility model provides a triple baffling formula subregion waterproof construction in undercut tunnel, includes tunnel (1) and adopts the combined type lining of compriseing preliminary bracing (4), waterproof layer (6) and secondary lining (5), and the body of a cave is located weak permeability country rock (7) and strong permeability country rock (8), its characterized in that: reinforcing surrounding rock in a certain range outside the contour line of the tunnel (1) at the boundary of the stratum with strong permeability and the stratum with weak permeability by adopting radial grouting to construct a first water-blocking area (2); filling sealing materials between the primary support (4) and the waterproof layer (6) to construct a second water blocking area; and (3) between the waterproof layer (6) and the secondary lining (5), a third water-blocking area is constructed by adopting a water-stop belt (61) which is pasted on the back of the waterproof layer (6) and is embedded into the convex part of the face of the waterproof layer (6) and the structure of the secondary lining (5).
2. The triple-barrier type partition waterproof structure for the underground excavated tunnel according to claim 1, wherein: the water stop (61) is in a structural structure type with large thickness and high bulge.
3. The triple-barrier type partition waterproof structure for the underground excavated tunnel according to claim 1 or 2, wherein: the waterproof layer (6) is arranged on the outer contour of the secondary lining (5), and the waterproof layer (6) and the primary support (4) are provided with filling materials (62) with the function of adhesives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707195.9A CN111779503A (en) | 2020-07-21 | 2020-07-21 | Triple baffling type partition waterproof structure of underground excavation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707195.9A CN111779503A (en) | 2020-07-21 | 2020-07-21 | Triple baffling type partition waterproof structure of underground excavation tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111779503A true CN111779503A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010707195.9A Pending CN111779503A (en) | 2020-07-21 | 2020-07-21 | Triple baffling type partition waterproof structure of underground excavation tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111779503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339018A (en) * | 2021-05-28 | 2021-09-03 | 深圳华新国际建筑工程设计顾问有限公司 | A undercut tunnel stagnant water structure for protecting groundwater environment |
-
2020
- 2020-07-21 CN CN202010707195.9A patent/CN111779503A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339018A (en) * | 2021-05-28 | 2021-09-03 | 深圳华新国际建筑工程设计顾问有限公司 | A undercut tunnel stagnant water structure for protecting groundwater environment |
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