CN210264761U - Waterproof sealing structure of shield tunnel segment joint - Google Patents
Waterproof sealing structure of shield tunnel segment joint Download PDFInfo
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- CN210264761U CN210264761U CN202020196838.3U CN202020196838U CN210264761U CN 210264761 U CN210264761 U CN 210264761U CN 202020196838 U CN202020196838 U CN 202020196838U CN 210264761 U CN210264761 U CN 210264761U
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Abstract
The utility model belongs to the technical field of the shield tunnel, specifically a waterproof sealing structure of shield tunnel section of jurisdiction seam, including waterproof sealing pad and waterproof sealing groove, its technical essential is: the cross section of the waterproof sealing gasket is I-shaped, the waterproof sealing gasket is composed of an outer sealing part corresponding to the lower edge of the I-shaped, an inner sealing part corresponding to the upper edge of the I-shaped, a connecting part arranged between the inner sealing part and the outer sealing part, the width of the outer sealing part is larger than that of the inner sealing part, the cross section of the inner sealing part is rectangular, sealing extending parts are arranged on two sides of the surface of the inner sealing part facing the outer sealing part respectively, the cross section of each sealing extending part is triangular, the tip of each sealing extending part faces the outer sealing part, the surface of the outer sealing part facing the inner sealing part is inclined to both sides by the connecting part to form a slope, and the thickness of the two sides, far away from. The utility model discloses a waterproof sealing performance improves greatly.
Description
Technical Field
The utility model belongs to the technical field of the shield tunnel, concretely relates to waterproof sealing structure of shield tunnel section of jurisdiction seam is applicable to the waterproof sealing of section of jurisdiction between the same ring section of jurisdiction of shield tunnel and adjacent two rings.
Background
The shield tunnel is a structure buried underground, and prevents tunnel collapse by supporting surrounding rocks around a shield shell and shield segments. The shield segment is a main assembly component for shield construction, is the innermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of a shield tunnel, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, so that the waterproof performance and the durability of the tunnel are influenced.
After the shield advances to finish, need assemble the shield structure section of jurisdiction cyclization fast, during the assembly, form the seam between each adjacent section of jurisdiction of ring and adjacent two rings of section of jurisdiction, consequently need adopt waterproof sealing gasket to seal the seam. Fig. 1 is a schematic cross-sectional view of a conventional waterproof sealing member, and fig. 2 is a schematic cross-sectional view of a joint position after a conventional segment is assembled. When assembling, the sealing grooves of the adjacent duct pieces A1 and B2 are respectively provided with the waterproof sealing elements 3 shown in figure 1, and after assembling, the two waterproof sealing elements are tightly connected. It has the following disadvantages: 1. when the external water pressure is too high, the two waterproof sealing pieces are squeezed apart to cause water leakage, which is shown in fig. 3; 2. when the relative pressure between the waterproof seals is too small, gaps may be generated between the waterproof seals, between the waterproof seals and the duct pieces, thereby causing water leakage, see fig. 4; 3. when the structure of the pipe pieces is deformed, the outer sides of joints among the pipe pieces can be opened at a certain angle, so that the mutual extrusion force among waterproof sealing parts is reduced to generate gaps, and the waterproof effect among the pipe pieces is greatly weakened; 4. with time, the waterproof seals between the segments will age, which will cause the pre-stress between the waterproof seals to relax, and the waterproof ability between the segments will also decrease significantly.
In order to improve the waterproof capability of the duct piece, the existing shield tunnel also has a sealing structure adopting an inner waterproof sealing gasket and an outer waterproof sealing gasket, but because a closed waterproof structure is not formed, when the duct piece joint is expanded, water in the stratum still easily passes through the waterproof sealing gasket on the outer side and finally permeates into the tunnel from the bolt hole or the waterproof sealing gasket on the inner side.
The invention discloses a waterproof sealing structure of a shield tunnel segment joint, which is invented with the application number of '201510052425.1', and provides a design that the waterproof sealing gaskets are pressed more and more tightly by water pressure and the waterproof sealing gaskets and the segment are pressed more and more tightly by water pressure, but the design has poor waterproof effect when the water pressure is not large enough.
The invention patent '201510052357.9' discloses a shield tunnel segment joint, which is characterized in that a waterproof sealing gasket of an outward-expanding longitudinal joint is designed on the inner side, and a longitudinal joint connecting bolt is designed on the outer side, so as to improve the waterproof capability and the bending rigidity of the segment joint. However, when the design is adopted, the waterproof effect of the duct piece is still influenced by the contact pressure stress of the waterproof sealing gasket, so that when the contact pressure stress of the waterproof sealing gasket is reduced due to tunnel deformation, waterproof sealing gasket aging and the like, the waterproof capacity of the joint is weakened, or under the action of excessive water pressure, water leakage can still occur on the waterproof sealing gasket of the duct piece joint.
Therefore, the existing waterproof sealing structure for the shield tunnel segment joint still needs to be improved.
Disclosure of Invention
An object of the utility model is to provide a simple structure, convenient operation's shield tunnel section of jurisdiction seam's waterproof sealing structure has solved current waterproof sealing structure because outside water pressure changes, and the diminishing of pressure between waterproof sealing member, the section of jurisdiction, section of jurisdiction structure deformation, the ageing reason of waterproof sealing member, and lead to the problem that waterproof function variation is the inefficacy even, and waterproof sealing performance improves greatly.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a shield tunnel section of jurisdiction seam's waterproof sealing structure, include waterproof sealing gasket and locate two adjacent section of jurisdiction edges with waterproof sealing gasket complex waterproof sealing groove, its technical essential is: the cross section of the waterproof sealing gasket is in an I shape, the waterproof sealing gasket comprises an outer sealing part corresponding to the lower edge of the I shape, an inner sealing part corresponding to the upper edge of the I shape, and a connecting part arranged between the inner sealing part and the outer sealing part, the width of the outer sealing part is greater than that of the inner sealing part, the cross section of the inner sealing part is rectangular, sealing extending parts are arranged on two sides of the surface of the outer sealing part, the cross section of each sealing extending part is triangular, the tip of each sealing extending part faces the outer sealing part, the surface of the outer sealing part facing the inner sealing part is inclined into a slope surface from the connecting part to two sides, and the thickness of the two sides of the outer sealing part far away from the connecting part is smaller than that of the.
The waterproof sealing structure of foretell shield tunnel section of jurisdiction seam, waterproof sealing groove comprises with interior sealing portion one side complex inside seal groove, with outer sealing portion one side complex outside seal groove, the cross section of inside seal groove is the rectangle, and the tank bottom surface contacts with the side and the sealed extension of inside seal portion, the tank bottom surface of outside seal groove is the inclined plane that corresponds with the domatic of outside seal portion, and the degree of depth of outside seal groove is greater than the thickness of outside seal portion, the opening side of outside seal groove is located the outer peripheral face of section of jurisdiction.
The waterproof sealing structure for the shield tunnel segment joint is characterized in that a plurality of holes are uniformly formed in the inner sealing part so as to enhance the plastic deformation capacity.
The waterproof sealing structure for the shield tunnel segment joint is characterized in that a transition inclined plane is arranged between the bottom surface of the outer sealing groove and the outer peripheral surface of the segment, and a stop inclined plane matched with the transition inclined plane is arranged at the slope tail end of the outer sealing part.
The utility model has the advantages that:
1. only need a waterproof sealing gasket to seal between the adjacent section of jurisdiction, inside and outside sealing portion forms two-layer sealed inoxidizing coating, compares in traditional individual layer sealed protection water-proof effects and obtains showing the promotion, safe and reliable more. The problem of current waterproof sealing structure because outside water pressure changes, the diminishing of pressure between waterproof sealing pad, the section of jurisdiction, section of jurisdiction structural deformation, waterproof sealing pad is ageing is solved, and lead to waterproof function variation or even inefficacy, waterproof sealing performance improves greatly.
2. The outer sealing part is compact under the action of water and soil pressure, the side is thin and easy to deform, when the shield tunnel longitudinally deforms to a certain extent with the cross section to cause the outside of the segment joint to open and the waterproof sealing gasket to age, the outer sealing part still can be in contact with the segment, and the waterproof effect is basically unchanged.
3. The inner sealing part is additionally provided with a sealing extension part which is relatively thin and is easy to deform under the action of water pressure, so that the inner sealing part is closely contacted with the bottom surface of the inner sealing groove more and plays a role in water prevention.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional waterproof gasket;
FIG. 2 is a cross-sectional view of a joint position after the assembly of the existing duct pieces;
FIG. 3 is a first schematic view of water leakage at the joint position after the assembly of the existing duct pieces;
FIG. 4 is a second schematic view of water leakage at the joint position after the assembly of the existing duct pieces;
FIG. 5 is a schematic sectional view of the assembly of the present invention;
fig. 6 is a schematic cross-sectional view of the sealing position of the present invention;
FIG. 7 is a schematic cross-sectional view of the waterproof gasket of the present invention;
fig. 8 is a schematic cross-sectional view of a waterproof seal groove on a single segment of the present invention;
fig. 9 is an expanded view of the installation position of the waterproof sealing gasket of each segment in the same ring.
In the figure: 1. the sealing structure comprises pipe pieces A, 101, inner sealing grooves A, 102, outer sealing grooves A, 2, pipe pieces B, 201, inner sealing grooves B, 202, outer sealing grooves B, 3, waterproof sealing elements, 4, waterproof sealing gaskets, 401, inner sealing parts, 402, outer sealing parts, 403, connecting parts, 404, sealing extending parts, 405, holes, 406, slopes, 407, stop slopes and 5 connecting bolts.
B II, a first assembled duct piece, B I, a right lower assembled duct piece, B III, a left lower assembled duct piece, F, a capping block duct piece, L I, a right upper assembled duct piece, and L II, a left upper assembled duct piece.
Detailed Description
The present invention is further illustrated by the following examples, which are set forth herein only to illustrate and explain the present invention, and are not intended to limit the present invention.
As shown in fig. 5-8, the waterproof sealing structure for the shield tunnel segment joint comprises a waterproof sealing gasket 4 and waterproof sealing grooves which are respectively arranged at the edges of two adjacent segments A1 and B2 and are matched with the waterproof sealing gasket 4.
The cross section of the waterproof sealing gasket 4 is in an I shape, and the waterproof sealing gasket is composed of an outer sealing part 402 corresponding to the lower edge of the I shape, an inner sealing part 401 corresponding to the upper edge of the I shape, and a connecting part 403 arranged between the inner sealing part 401 and the outer sealing part 402. The width of the outer seal 402 is greater than the width of the inner seal 401. The cross section of the inner sealing part 401 is rectangular, sealing extension parts 404 are respectively arranged on two sides of the surface facing the outer sealing part 402, the cross section of each sealing extension part 404 is triangular, and the tip of each sealing extension part faces the outer sealing part 402. The surface of the outer sealing part 402 facing the inner sealing part 401 is inclined from the connecting part 403 to two sides to form a slope 406, and the thickness of the two sides of the outer sealing part 402 far away from the connecting part 403 is smaller than that of the middle part close to the connecting part 403. A plurality of holes 405 are uniformly formed in the inner sealing portion 401 to enhance the plastic deformation capability.
The waterproof sealing groove consists of an inner sealing groove matched with one side of the inner sealing part 401 and an outer sealing groove matched with one side of the outer sealing part 402, the waterproof sealing groove of the duct piece A1 consists of an inner sealing groove A101 and an outer sealing groove A102, and the waterproof sealing groove of the duct piece B2 consists of an inner sealing groove B201 and an outer sealing groove B202.
The cross sections of the inner seal groove A101 and the inner seal groove B201 are rectangular, the groove bottom surfaces of the inner seal portion 401 and the inner seal portion 401 are in contact with the seal extension portion 404, the groove bottom surfaces of the outer seal groove A102 and the outer seal groove B202 are inclined surfaces corresponding to the slope 406 of the outer seal portion, the depth of the outer seal groove A102 and the depth of the outer seal groove B202 are larger than the thickness of the outer seal portion 402, and the opening sides of the outer seal groove A102 and the outer seal groove B202 are located on the outer peripheral surface of the pipe piece. Transition inclined planes are arranged between the groove bottom surfaces of the outer sealing groove A102 and the outer sealing groove B202 and the outer peripheral surface of the pipe piece, and a stop inclined plane 407 matched with the transition inclined planes is arranged at the tail end of a slope 406 of the outer sealing part.
Referring to fig. 9, the same ring of segments is being assembled, the front edge and the left side of the first assembled segment bii, the right side edge is respectively stuck with the waterproof sealing gasket 4 by the waterproof sealing groove, other segments except for the capping segment F (the segment bii is assembled under the right side on the right side of the first assembled segment bii, the segment biii is assembled under the left side of the first assembled segment bii, the segment lei is assembled on the upper right on the right side of the first assembled segment bii, the segment lei is assembled on the upper left on the left side of the first assembled segment bii), the left side or the right side edge and the front edge are stuck with the waterproof sealing groove to the waterproof sealing gasket 4, and the capping segment F is only stuck with the waterproof sealing groove to the waterproof sealing gasket 4. The waterproof sealing gaskets 4 bonded along the left side and the right side are used for waterproof sealing between adjacent segments of the same ring, and the waterproof sealing gaskets 4 bonded along the front edge are used for waterproof sealing between adjacent segments of the ring. After assembling, the duct piece is fixed by the connecting bolt 5.
Claims (4)
1. The utility model provides a shield tunnel section of jurisdiction seam's waterproof sealing structure, include waterproof sealing gasket and locate two adjacent section of jurisdiction edges with waterproof sealing gasket complex waterproof sealing groove, its characterized in that: the cross section of the waterproof sealing gasket is in an I shape, the waterproof sealing gasket comprises an outer sealing part corresponding to the lower edge of the I shape, an inner sealing part corresponding to the upper edge of the I shape, and a connecting part arranged between the inner sealing part and the outer sealing part, the width of the outer sealing part is greater than that of the inner sealing part, the cross section of the inner sealing part is rectangular, sealing extending parts are arranged on two sides of the surface of the outer sealing part, the cross section of each sealing extending part is triangular, the tip of each sealing extending part faces the outer sealing part, the surface of the outer sealing part facing the inner sealing part is inclined into a slope surface from the connecting part to two sides, and the thickness of the two sides of the outer sealing part far away from the connecting part is smaller than that of the.
2. The waterproof and sealing structure of a shield tunnel segment joint of claim 1, characterized in that: the waterproof sealing groove comprises an inner sealing groove matched with one side of the inner sealing part and an outer sealing groove matched with one side of the outer sealing part, the cross section of the inner sealing groove is rectangular, the groove bottom surface of the inner sealing groove is in contact with the side surface of the inner sealing part and the sealing extension part, the groove bottom surface of the outer sealing groove is an inclined surface corresponding to the slope surface of the outer sealing part, the depth of the outer sealing groove is larger than the thickness of the outer sealing part, and the opening side of the outer sealing groove is located on the outer peripheral surface of the pipe piece.
3. The waterproof and sealing structure of a shield tunnel segment joint of claim 1, characterized in that: a plurality of holes are uniformly formed in the inner sealing part.
4. The waterproof and sealing structure of a shield tunnel segment joint of claim 2, wherein: a transition inclined plane is arranged between the groove bottom surface of the outer sealing groove and the outer peripheral surface of the duct piece, and a stop inclined plane matched with the transition inclined plane is arranged at the tail end of the slope surface of the outer sealing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196838.3U CN210264761U (en) | 2020-02-24 | 2020-02-24 | Waterproof sealing structure of shield tunnel segment joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196838.3U CN210264761U (en) | 2020-02-24 | 2020-02-24 | Waterproof sealing structure of shield tunnel segment joint |
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| Publication Number | Publication Date |
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| CN210264761U true CN210264761U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020196838.3U Active CN210264761U (en) | 2020-02-24 | 2020-02-24 | Waterproof sealing structure of shield tunnel segment joint |
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| CN (1) | CN210264761U (en) |
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2020
- 2020-02-24 CN CN202020196838.3U patent/CN210264761U/en active Active
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