CN212003221U - Shield tunnel segment elastic sealing gasket suitable for high water pressure condition - Google Patents
Shield tunnel segment elastic sealing gasket suitable for high water pressure condition Download PDFInfo
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- CN212003221U CN212003221U CN202020137609.4U CN202020137609U CN212003221U CN 212003221 U CN212003221 U CN 212003221U CN 202020137609 U CN202020137609 U CN 202020137609U CN 212003221 U CN212003221 U CN 212003221U
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Abstract
An elastic sealing gasket for shield tunnel pipe pieces under a high water pressure condition is provided, wherein a first sealing gasket and a second sealing gasket are arranged between two adjacent pipe pieces, and the first sealing gasket is connected with the second sealing gasket; divide into two parts with sealed the pad, when assembling the section of jurisdiction, utilize the thrust of jack to form a complete structure with the shear force key embedding of two sealed pads in the shear force groove of the other side, reach water-proof effects, sealed pad middle part processing has the elliptical aperture, makes the atress of sealed pad more reasonable, and sealed pad bottom sets up the mounting groove, and the mounting groove is protruding corresponding with the installation of section of jurisdiction, prevents that the water pressure is too big and make sealed pad diastrophism cause waterproof inefficacy.
Description
Technical Field
The utility model belongs to the technical field of the shield tunnel construction, concretely relates to shield tunnel section of jurisdiction resilient seal's waterproof technique.
Background
In recent years, the rail transit in China is rapidly developed, and the rail transit is opened in 35 total cities in China by 2018, the number of operation lines reaches 185, and the total length reaches 5761.4 km. In the rail transit construction, the shield method, the open excavation method, the shallow buried excavation method and other methods have the characteristics of large construction disturbance and high construction speed, so that the method is widely applied. The urban rail transit segment structure constructed by the shield method is used as a main structure of a tunnel, and the structural stability of the segment structure is very important for safe operation of the tunnel. The tunnel water-proofing is the important factor for guaranteeing the durability and the safety of the tunnel, the shield tunnel water-proofing mainly has the structure of self-waterproofing (the segment is waterproof and the grouting is waterproof) and seam waterproofing, the seam is an assembly seam between the segment and is the weakest link in the water-proofing process, the main mode is the sealing gasket waterproofing, and the waterproof effect is achieved by stress extrusion applied during the segment assembly.
With the development of rail transit, the shield tunnel engineering of the cross river and the sea increases year by year, for example, a lot of engineering such as a pump road tunnel, a Nanjing Yangtze river tunnel, a lion-ocean tunnel, a Wuhan subway No. 4 line and the like, the shield tunnel of the cross river and the sea is buried deeply and bears large water pressure, wherein the maximum water pressure borne by the Sutong GIF pipe gallery is 0.8MPa, and the common sealing gasket can not meet the waterproof requirement under the condition.
In conclusion, the development of the sealing gasket suitable for the high water pressure condition has important practical significance for shield tunnel engineering in China, and the invention aims to develop the sealing gasket which is suitable for the high water pressure condition and has excellent performance.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a shield tunnel section of jurisdiction elastic sealing pad under the high water pressure condition that is applicable to that reasonable in design, simple structure, atress are even, the durability is good.
The technical scheme for solving the technical problems is as follows: a first sealing gasket and a second sealing gasket are arranged between two adjacent pipe pieces and are connected;
the first sealing gasket is as follows: at least 3 first shear grooves are processed on the upper surface of the first sealing gasket body along the length direction of the first sealing gasket body, a first shear key is formed between every two adjacent first shear grooves, at least 2 rows of first buffer holes are processed in the middle of the first sealing gasket along the length direction of the first sealing gasket body, at least 3 first U-shaped grooves are processed at the bottom of the first sealing gasket along the length direction of the first sealing gasket body, and first mounting grooves are processed between every two adjacent first U-shaped grooves;
the second sealing gasket is as follows: at least 3 second shear keys are processed on the upper surface of the second sealing gasket body along the length direction of the second sealing gasket body, a second shear groove is formed between every two adjacent second shear keys, the second shear keys are embedded into the first shear groove, the first shear keys are embedded into the second shear groove, at least 2 rows of second buffer holes are processed in the middle of the second sealing gasket along the length direction of the second sealing gasket body, at least 3 second U-shaped grooves are processed in the bottom of the second sealing gasket along the length direction of the second sealing gasket body, and a second mounting groove is processed between every two adjacent U-shaped grooves;
the duct piece is as follows: processing on the section of jurisdiction body is fluted, and the recess suits with first gasket body and the sealed body of filling up of second, and recess upper surface processing has 2 at least installation archs, and the protruding embedding of installation is in first mounting groove and the second mounting groove.
The utility model discloses a quantity of first shear force groove is the same with the quantity of second shear force key, and the quantity of second shear force groove is the same with the quantity of first shear force key.
The utility model discloses a quantity of installation arch is the same with the quantity of first mounting groove and second mounting groove.
The utility model discloses an adjacent two lines of staggered arrangement of first buffer hole, adjacent two lines of staggered arrangement of second buffer hole.
The utility model discloses a first cushion hole is the elliptical aperture, and the second cushion hole is the elliptical aperture.
Compared with the prior art, the utility model has the following advantages:
1. the sealing gaskets are divided into two parts, and when the duct pieces are assembled, the shear keys of the two sealing gaskets are embedded into the shear grooves of the other sealing gasket by using the thrust of the jack to form a complete structure, so that the waterproof effect is achieved.
2. The middle part of the sealing gasket is provided with an elliptical hole, so that the stress of the sealing gasket is more reasonable.
3. The bottom of the sealing gasket is provided with a mounting groove, and the mounting groove corresponds to the mounting protrusion of the duct piece, so that the sealing gasket is prevented from moving in a staggered manner due to overlarge water pressure to cause waterproof failure.
4. The sealing gasket body adopts ethylene propylene diene monomer, and the shear force key adopts water-swelling rubber, and under long-term stress state, sealed the pad can produce certain stress relaxation, and the joint part probably takes place to open, and middle shear force key can take place the inflation after meeting water, and sealed pad extrudees mutually and guarantees that waterproof can not become invalid.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of the structure of the first gasket 2 in fig. 1.
Fig. 3 is a schematic view of the structure of the second gasket 3 in fig. 1.
Fig. 4 is a schematic structural view of the segment 1 of fig. 1.
In the figure: 1. a duct piece; 2. a first gasket; 3. a second gasket; 4. a duct piece; 1-1, a segment body; 1-2, mounting a bulge; 2-1, a first gasket body; 2-2, a first shear key; 3-1, a second gasket body; 3-2, a second shear key; a. a first U-shaped slot; b. a first mounting groove; c. a first buffer hole; d. a first shear groove; f. a second U-shaped slot; g. a second mounting groove; h. a second buffer hole; i. a second shear groove.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited to these examples.
Example 1
In fig. 1-4, the utility model relates to a shield tunnel section of jurisdiction elastic sealing pad suitable for under the high water pressure condition installs the sealed pad 3 of first sealed pad 2 and second between the two adjacent sections of jurisdiction 1, and the sealed pad 3 of first sealed pad 2 and second is connected. Later stage is at the tunnel operation in-process, and first sealed pad 2 seals up 3 in close contact with the second, and the effort that mainly receives has the vertical extrusion stress of section of jurisdiction 1 and the lateral water pressure around the tunnel, and sealed pad is under the effect of extrusion stress, and the water is difficult to through the seam in order to reach waterproof effect.
The first sealing gasket 2 is formed by connecting a first sealing gasket body 2-1 and a first shear key 2-2 into a whole, at least 3 first shear grooves d are processed on the upper surface of the first sealing gasket body 2-1 along the length direction of the first sealing gasket body 2-1, a first shear key 2-2 is formed between every two adjacent first shear grooves d, at least 2 rows of first buffer holes c are processed in the middle of the first sealing gasket 2-1 along the length direction of the first sealing gasket body 2-1, two adjacent rows of first buffer holes c are arranged in a staggered mode, and as the extrusion force of the shield segment is greater than the lateral pressure of a water body, the first buffer holes c are elliptical holes, and the elliptical hole opening mode enables the sealing gasket to be stressed more uniformly. The bottom of the first sealing gasket 2-1 is provided with at least 3 first U-shaped grooves a along the length direction of the first sealing gasket body 2-1, and a first mounting groove b is formed between every two adjacent first U-shaped grooves a;
the second sealing gasket 3 is formed by connecting a second sealing gasket body 3-1 and second shear keys 3-2 into a whole, at least 3 second shear keys 3-2 are processed on the upper surface of the second sealing gasket body 3-1 along the length direction of the second sealing gasket body 3-1, and a second shear groove i is formed between every two adjacent second shear keys 3-2. The number of the first shear grooves d is the same as that of the second shear keys 3-2, the number of the second shear grooves i is the same as that of the first shear keys 2-2, the second shear keys 3-2 are embedded into the first shear grooves d, the first shear keys 2-2 are embedded into the second shear grooves i, the first sealing gasket body 2-1 and the second sealing gasket body 3-1 are made of ethylene propylene diene monomer rubber, the ethylene propylene diene monomer rubber has good durability and waterproofness, the first shear keys 2-2 and the second shear keys 3-2 are made of water-swelling rubber, the sealing gaskets can generate certain stress relaxation in a long-term stress state, the joint parts of the first shear keys 2-2 and the second shear grooves i and the joint parts of the second shear keys 3-2 and the first shear grooves d can be opened, and the middle shear keys can expand after meeting water, the mutual squeezing of the sealing gaskets ensures that the waterproof will not fail. At least 2 rows of second buffer holes h are processed in the middle of the second sealing gasket 3-1 along the length direction of the second sealing gasket body 3-1, and two adjacent rows of second buffer holes h are arranged in a staggered mode. The second buffer hole h is an elliptical hole, and the elliptical hole forming mode enables the stress of the sealing gasket to be more uniform. At least 3 second U-shaped grooves f are formed in the bottom of the second sealing gasket 3-1 along the length direction of the second sealing gasket body 3-1, and a second mounting groove g is formed between every two adjacent second U-shaped grooves f;
the pipe piece 1 is formed by connecting a pipe piece body 1-1 and mounting protrusions 1-2 into a whole, grooves are processed in the pipe piece body 1-1 and are matched with a first sealing pad body 2-1 and a second sealing pad body 3-1, at least 2 mounting protrusions 1-2 are processed on the upper surface of each groove, and the mounting protrusions 1-2 can effectively prevent the lateral water pressure of a tunnel from being too high to cause the sliding instability of the sealing pads to cause water infiltration. The number of the installation bulges 1-2 is the same as that of the first installation grooves b and the second installation grooves g, and the installation bulges 1-2 are embedded into the first installation grooves b and the second installation grooves g.
Claims (5)
1. The utility model provides a shield tunnel section of jurisdiction elastic sealing pad suitable for under high water pressure condition which characterized in that: a first sealing gasket (2) and a second sealing gasket (3) are arranged between two adjacent pipe pieces (1), and the first sealing gasket (2) is connected with the second sealing gasket (3);
the first sealing gasket (2) is as follows: at least 3 first shear grooves (d) are machined in the upper surface of the first sealing gasket body (2-1) along the length direction of the first sealing gasket body (2-1), a first shear key (2-2) is formed between every two adjacent first shear grooves (d), at least 2 rows of first buffer holes (c) are machined in the middle of the first sealing gasket body (2-1) along the length direction of the first sealing gasket body (2-1), at least 3 first U-shaped grooves (a) are machined in the bottom of the first sealing gasket body (2-1) along the length direction of the first sealing gasket body (2-1), and first mounting grooves (b) are machined between every two adjacent first U-shaped grooves (a);
the second sealing gasket (3) is: at least 3 second shear keys (3-2) are processed on the upper surface of the second sealing gasket body (3-1) along the length direction of the second sealing gasket body (3-1), a second shear groove (i) is formed between every two adjacent second shear keys (3-2), the second shear keys (3-2) are embedded into the first shear grooves (d), the first shear key (2-2) is embedded into the second shear groove (i), at least 2 rows of second buffer holes (h) are processed in the middle of the second sealing gasket body (3-1) along the length direction of the second sealing gasket body (3-1), at least 3 second U-shaped grooves (f) are processed in the bottom of the second sealing gasket body (3-1) along the length direction of the second sealing gasket body (3-1), and a second mounting groove (g) is processed between every two adjacent U-shaped grooves (f);
the duct piece (1) is as follows: the duct piece body (1-1) is provided with a groove, the groove is matched with the first sealing pad body (2-1) and the second sealing pad body (3-1), at least 2 mounting protrusions (1-2) are arranged on the upper surface of the groove in a processing mode, and the mounting protrusions (1-2) are embedded into the first mounting groove (b) and the second mounting groove (g).
2. The shield tunnel segment elastic sealing gasket applicable to the high water pressure condition as claimed in claim 1, wherein: the number of the first shear grooves (d) is the same as that of the second shear keys (3-2), and the number of the second shear grooves (i) is the same as that of the first shear keys (2-2).
3. The shield tunnel segment elastic sealing gasket applicable to the high water pressure condition as claimed in claim 1, wherein: the number of the mounting protrusions (1-2) is the same as that of the first mounting grooves (b) and that of the second mounting grooves (g).
4. The shield tunnel segment elastic sealing gasket applicable to the high water pressure condition as claimed in claim 1, wherein: two adjacent rows of the first buffer holes (c) are arranged in a staggered mode, and two adjacent rows of the second buffer holes (h) are arranged in a staggered mode.
5. The shield tunnel segment elastic sealing gasket applicable to the high water pressure condition as claimed in claim 4, wherein: the first buffer hole (c) is an elliptical hole, and the second buffer hole (h) is an elliptical hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137609.4U CN212003221U (en) | 2020-01-20 | 2020-01-20 | Shield tunnel segment elastic sealing gasket suitable for high water pressure condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137609.4U CN212003221U (en) | 2020-01-20 | 2020-01-20 | Shield tunnel segment elastic sealing gasket suitable for high water pressure condition |
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| CN212003221U true CN212003221U (en) | 2020-11-24 |
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| CN202020137609.4U Active CN212003221U (en) | 2020-01-20 | 2020-01-20 | Shield tunnel segment elastic sealing gasket suitable for high water pressure condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113062357A (en) * | 2021-04-08 | 2021-07-02 | 常熟理工学院 | Prefabricated pipe gallery prestressing force is sealed to be sealed |
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2020
- 2020-01-20 CN CN202020137609.4U patent/CN212003221U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113062357A (en) * | 2021-04-08 | 2021-07-02 | 常熟理工学院 | Prefabricated pipe gallery prestressing force is sealed to be sealed |
| CN113062357B (en) * | 2021-04-08 | 2022-03-04 | 常熟理工学院 | Prefabricated pipe gallery prestressing force is sealed to be sealed |
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