CN221481939U - A water-stopping structure for the initial tunnel of a shield machine - Google Patents
A water-stopping structure for the initial tunnel of a shield machine Download PDFInfo
- Publication number
- CN221481939U CN221481939U CN202420281472.8U CN202420281472U CN221481939U CN 221481939 U CN221481939 U CN 221481939U CN 202420281472 U CN202420281472 U CN 202420281472U CN 221481939 U CN221481939 U CN 221481939U
- Authority
- CN
- China
- Prior art keywords
- polyvinyl chloride
- chloride sheet
- steel plate
- tunnel
- stopping structure
- Prior art date
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
本实用新型公开了一种盾构始发洞门止水结构，包括将预埋钢板在洞口施工时沿隧道前进方向以一定宽度在基坑侧墙上布设一圈，聚氯乙烯薄板一端通过带螺纹螺杆、螺栓与管片紧密连接，一端在预埋钢板上面的环状钢板一和环状钢板二双层夹在中间，将基坑侧墙与管片之间密封连接。本实用新型有效地解决了盾构隧道施工中的水分渗透和涌砂问题，提高了工程的安全性和效率。
The utility model discloses a shield tunneling starting portal water-stopping structure, which includes arranging a circle of embedded steel plates on the side wall of the foundation pit with a certain width along the tunnel advancing direction during tunnel construction, one end of the polyvinyl chloride sheet is tightly connected to the pipe segment through a threaded screw and a bolt, and a ring-shaped steel plate 1 and a ring-shaped steel plate 2 on one end of the embedded steel plate are double-layered in the middle to seal the side wall of the foundation pit and the pipe segment. The utility model effectively solves the problems of water penetration and sand gushing in shield tunnel construction, and improves the safety and efficiency of the project.
Description
Technical Field
The utility model relates to the technical field of shield tunnel water stopping, in particular to a shield starting tunnel portal water stopping structure.
Background
Shield tunneling is a widely used technique for underground engineering, and the originating portal is a critical part of the tunnel engineering. However, during construction of a shield tunnel, the initial opening is often faced with moisture penetration. When silt and a water-rich silt-containing middle sand layer exist in the surrounding environment, the problems of water seepage, sand burst and the like are more likely to occur at the position of the shield starting hole. Therefore, it is necessary to provide a tight and efficient water stopping structure for a tunnel portal to ensure safe and smooth progress of tunnel construction.
The prior technical scheme for solving the problem of water seepage and sand gushing at the starting hole of the shield mainly comprises two methods of concrete sealing and annular steel plate welding. In concrete sealing schemes, the primary step is to ensure thorough cleaning of the surface of the originating opening and to apply a primer to promote concrete adhesion. And then, casting by adopting high-strength and water-resistant concrete so as to effectively block a potential water seepage sand surge channel. However, this method has a disadvantage in that the concrete may crack due to formation changes or temperature, and the water seepage problem is re-exposed. In addition, in shield construction, concrete pouring is limited by engineering conditions, so that construction difficulty is increased.
Another common solution is to use a technique of welding ring-shaped steel plates. The process involves cleaning the surface of the originating opening, installing an annular steel plate and ensuring that it forms a tight water-tight barrier by welding. And then, carrying out anti-corrosion treatment on the annular steel plate to improve the anti-corrosion performance of the annular steel plate. However, this method has a disadvantage in that the lack of weld quality may cause a problem of missing weld, thereby deteriorating the sealing effect. In addition, the ring-shaped steel plate is easy to rust in a humid environment, thereby affecting the long-term sealing performance thereof.
Disclosure of utility model
In order to overcome the problems in the prior art, the utility model aims to provide a shield starting tunnel portal water stopping structure which effectively solves the problems of water penetration and sand burst in shield tunnel construction and improves the safety and efficiency of engineering.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
A shield-driven tunnel portal water stopping structure comprises an embedded steel plate 2, wherein a circle of polyvinyl chloride thin plates 5 are arranged on a foundation pit side wall 1 along the tunnel advancing direction in a certain width mode during tunnel portal construction, one ends of the polyvinyl chloride thin plates 5 are tightly connected with duct pieces 9 through threaded screws 7 and bolts 8, and annular steel plates I3 and II 4 of one ends of the polyvinyl chloride thin plates are clamped in the middle in a double-layer mode on the embedded steel plate 2, and the foundation pit side wall 1 and the duct pieces 9 are connected in a sealing mode.
The polyvinyl chloride sheet 5 is of an annular ribbed structure and comprises radial ribs 13 and annular ribs 14, the radial ribs 13 and the annular ribs 14 are arranged on the back surface of the polyvinyl chloride sheet 5, the annular ribs 14 are circumferentially distributed in the middle of the polyvinyl chloride sheet 5, the radial ribs 13 are radially distributed on the polyvinyl chloride sheet 5, and the included angle is 45 degrees.
The two ends of the threaded screw rod 7 are provided with threads, one end of the threaded screw rod is fixed in a duct piece wedge-shaped groove 10 of the tunnel portal through a bolt, the duct piece wedge-shaped groove 10 is inside a duct piece 9, and the other end of the threaded screw rod is connected with the polyvinyl chloride sheet 5 through a bolt 8.
Holes having the same diameter as the threaded screw 7 are previously opened at the positions where the threaded screw passes through to ensure tight connection with the segment 9.
And each ring of the duct piece is connected through bolts.
An industrial rubber sealing gasket 6 is arranged between the polyvinyl chloride sheet 5 and the bolt 8.
The utility model has the beneficial effects that:
1. The waterproof effect is excellent: the utility model comprises the components of the industrial rubber sealing gasket, the annular steel plate, the ribbed polyvinyl chloride sheet and the like, and has good water stopping effect. The method can effectively prevent the problems of water penetration and sand burst, and ensure the safe and efficient construction of the shield tunnel.
2. Structural strength improves: the strength of the polyvinyl chloride sheet is improved by prefabricating the annular polyvinyl chloride sheet with ribs, so that the annular polyvinyl chloride sheet meets engineering requirements. The structure not only has the water stopping function, but also has enough structural strength, and can bear vibration and pressure in the tunnel construction process.
3. Easy to install: the component design of the structure is reasonable, such as a prefabricated screw, a bolt and a connecting mode, so that the installation process is relatively simple and convenient, and the engineering progress efficiency can be improved. In addition, the size of the polyvinyl chloride sheet is smaller than the gap size at the opening, so that the sheet is ensured not to be damaged in the welding process.
4. Corrosion resistance and durability: the polyvinyl chloride material has high stability in water and can not be corroded or corroded by water. The structure has long-term durability and can effectively maintain the functions of the shield tunnel during the service life of the shield tunnel.
5. The applicability is wide: the utility model is suitable for shield tunnel construction under various environmental and geological conditions, and has more remarkable effect especially under severe conditions such as silt and a silt-rich middle-soil layer.
In general, the water stopping structure of the shield starting portal effectively solves the problems of water penetration and sand burst in shield tunnel construction through reasonable design and component selection, improves the safety and efficiency of engineering, and has wide application prospect.
Drawings
FIG. 1 is a schematic plan view of the present utility model.
Fig. 2 is a schematic view of the in-segment bolting of the present utility model.
FIG. 3 is a schematic view of an annular polyvinyl chloride sheet of the utility model.
FIG. 4 is a schematic cross-sectional view of the present utility model.
Reference numerals:
The foundation pit side wall 1, the embedded steel plate 2, the annular steel plate I3, the annular steel plate II 4, the polyvinyl chloride sheet 5, the industrial rubber sealing gasket 6, the threaded screw 7, the nut 8, the duct piece 9, the duct piece wedge-shaped groove 10, the nut 11, the prefabricated hole 12, the radial rib 13 and the annular rib 14.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-4: the utility model provides a shield constructs and originates a hole gate stagnant water structure, this structure sets up in shield constructs and originates a hole gate department, includes threaded screw rod 7, bolt 8, industry rubber seal gasket 6, prefabricated annular ribbed polyvinyl chloride sheet 5 and annular steel sheet 3 and annular steel sheet two 4 five parts.
The prefabricated annular polyvinyl chloride sheet 5 with ribs not only improves the strength thereof to meet engineering requirements, but also has excellent water stopping effect. The embedded steel plate 2 at the side wall of the foundation pit is distributed on the side wall 1 of the foundation pit along the advancing direction of the tunnel by a certain width during the construction of the tunnel portal, so that the overall stability of the side wall of the foundation pit is improved, and the safety of engineering construction is improved. A circle of annular holes are reserved between a first annular cylindrical pipe piece 9 at the position of a tunnel starting hole after construction is completed and a foundation pit side wall 1, one end of a prefabricated ribbed annular polyvinyl chloride sheet 5 is tightly connected with the pipe piece 9 through a bolt 8, and the other end of the prefabricated ribbed annular polyvinyl chloride sheet is clamped between the foundation pit side wall 1 and the pipe piece 9 by using a double-layer clamp of an annular steel plate I3 and an annular steel plate II 4 which are welded on an embedded steel plate 2 at the position of the foundation pit side wall.
Through the annular polyvinyl chloride sheet 5 of prefabricated ribbed, not only improved its intensity in order to satisfy engineering demand, but also played good stagnant water effect.
The thickness of the prefabricated annular ribbed polyvinyl chloride sheet 5 is about 2cm, the thickness of the ribs is about 1cm, the width of the ribs is about 2cm, the radial ribs 13 and the circumferential ribs 14 are arranged on the back surface of the polyvinyl chloride sheet 5, the circumferential ribs 14 are about 2cm wide, the thickness of the circumferential ribs is 1cm, the circumferential ribs are distributed in the middle of the sheet 5 in the circumferential direction, the radial ribs 13 are distributed on the polyvinyl chloride sheet 5 in the radial direction, the included angle is 45 degrees, the thickness of the radial ribs is 1cm, and the width of the radial ribs is 2cm. Holes having the same diameter as the threaded screw 7 are previously opened at the positions where the threaded screw passes through to ensure tight connection with the segment 9.
The rings of the shield tunnel segment 9 are connected through bolts, the length of the inter-ring screw is about 0.6m, the length of the threaded screw 7 is about half of the inter-ring screw, the length of the threaded screw is 0.3m, and both ends of the threaded screw are provided with threads. One end of the pipe piece wedge-shaped groove 10 is fixed in the pipe piece wedge-shaped groove 10 of the tunnel portal through bolts, the pipe piece wedge-shaped groove 10 is arranged inside the pipe piece 9 according to a normal process when the pipe piece is prefabricated, and the other end of the pipe piece wedge-shaped groove is also connected through bolts to fix the prefabricated ribbed annular polyvinyl chloride sheet 5.
The polyvinyl chloride sheet 5 is connected with the duct piece 9 through bolts, and an industrial rubber sealing gasket 6 is placed between the polyvinyl chloride sheet 5 and the bolts during bolting, so that the polyvinyl chloride sheet is tightly connected with the duct piece 9 during bolting, and an excellent water stopping effect is achieved.
The polyvinyl chloride sheet 5 has a shape as shown in fig. 3, and is formed as a ring-shaped circular plate having a thickness of about 2cm as a whole. The segment 9 is cylindrical as a whole, the polyvinyl chloride sheet 5 is connected to the segment 9 through an industrial rubber sealing gasket 6 and a bolt 8, and the whole is that the outside of the cylindrical segment 9 at the shield starting hole is tightly connected with a polyvinyl chloride ring circular plate 5.
The radial dimension of the precast polyvinyl chloride sheet 5 is about 3cm smaller than the gap between the tunnel portal and the surrounding foundation pit side wall 1. And an annular steel plate with the radial length of about 8cm is respectively arranged at two sides of one end, close to the foundation pit side wall 1, of the polyvinyl chloride sheet 5. One end of the waterproof sealing device is used for fixing the polyvinyl chloride thin plate 5 in the middle through extrusion so as to ensure that a good waterproof effect is achieved, and the other end of the waterproof sealing device is connected with the embedded steel plate 2 at the side wall 1 of the foundation pit through welding. Since the size of the prefabricated polyvinyl chloride sheet 5 is smaller than the size of the gap at the opening, the polyvinyl chloride sheet 5 is not damaged during welding.
The working principle of the utility model is as follows:
Firstly, the welding position of the embedded steel plate 2 and the annular steel plate 3 of the foundation pit side wall 1 is accurately measured, the polyvinyl chloride sheet 5 is ensured not to be misplaced during installation, and the annular steel plate 3 and the embedded steel plate 2 of the foundation pit side wall are welded according to a correct construction method.
Then one end of the threaded screw rod 7 is fixed in a wedge-shaped groove 11 on a pipe piece 9 at a tunnel portal through a bolt, then a prefabricated ribbed annular polyvinyl chloride sheet 5 is installed, a prefabricated hole 12 on the polyvinyl chloride sheet 5 penetrates through the threaded screw rod 7 at one side of the polyvinyl chloride sheet 5 close to the pipe piece 9, so that the polyvinyl chloride sheet is tightly connected with the pipe piece 9, an industrial rubber sealing gasket 6 is padded, and finally a screw cap 8 is screwed down, so that tight connection among all components is ensured.
After one end of the prefabricated ribbed annular polyvinyl chloride sheet 5 is completely connected with the duct piece 9 through bolts, the annular steel plate II 4 is tightly pressed on the polyvinyl chloride sheet 5, tight connection among the annular steel plates 3 and 4 on two sides and the polyvinyl chloride sheet 5 is ensured, a good sealing and water stopping effect can be achieved, and then the annular steel plate II 4 is welded according to a correct construction method.
Through the connection of the structure, effective sealing between the shield tunnel starting opening and surrounding walls is successfully realized, and the sealing structure effectively prevents surrounding silt and water in the sand soil layer from penetrating out from the opening, so that the waterproofing and safety of tunnel construction are ensured.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420281472.8U CN221481939U (en) | 2024-02-06 | 2024-02-06 | A water-stopping structure for the initial tunnel of a shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420281472.8U CN221481939U (en) | 2024-02-06 | 2024-02-06 | A water-stopping structure for the initial tunnel of a shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221481939U true CN221481939U (en) | 2024-08-06 |
Family
ID=92355608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420281472.8U Expired - Fee Related CN221481939U (en) | 2024-02-06 | 2024-02-06 | A water-stopping structure for the initial tunnel of a shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221481939U (en) |
-
2024
- 2024-02-06 CN CN202420281472.8U patent/CN221481939U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204080836U (en) | The fast plugging device of dewatering well in a kind of building basement | |
| CN205000976U (en) | A shield structure segment lining structure for deep drainage tunnel | |
| CN204267915U (en) | Strengthen the two rubber sealing reinforced concrete sewer pipe of jacking construction corrosion protection | |
| CN214363970U (en) | A simple temporary drainage ditch | |
| CN205243534U (en) | Shield tunnel segment ring stitches waterproof construction | |
| CN221481939U (en) | A water-stopping structure for the initial tunnel of a shield machine | |
| CN117231249A (en) | An assembled pipe jacking well | |
| CN211597433U (en) | A pipeline waterproofing device extending out of the roof | |
| CN212742598U (en) | Precipitation well block structure | |
| CN221145581U (en) | Mechanical pipe jacking hole outlet through-wall water stopping structure | |
| CN209229132U (en) | A kind of steel ring for non-excavation repair pretreatment of pipeline collapse | |
| CN100552187C (en) | Outlet water-proof method for large diameter shield tunnel | |
| CN208136954U (en) | Precast splice type Pipe rack | |
| CN100529330C (en) | Combined waterproof method for exit of shield tunnel | |
| CN215293914U (en) | Pipeline penetrating pool wall structure | |
| CN205242454U (en) | Underground concrete structure expansion joint administration structure | |
| CN203546725U (en) | Backfilling grouting device capable of being recycled | |
| CN208024964U (en) | The embed-type Prestressed concrete cylinder pipe of full anti-corrosion | |
| CN211118035U (en) | Waterproof structure of underground side wall dense wall-penetrating pipeline | |
| CN210857249U (en) | Precipitation well plugging device and precipitation well structure | |
| CN221645748U (en) | Water stopping structure of hydraulic tunnel plug circumferential contact surface | |
| CN220451890U (en) | A kind of prefabricated well piece assembly structure | |
| CN103162021A (en) | Underground structure outer wall feed-through sleeve waterproof device and construction method thereof | |
| CN209654369U (en) | A steel corrugated plate structure for good sealing | |
| CN213776621U (en) | A new type of water-stop through-wall steel casing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20240806 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |