CN214244278U - Self-adhesive elastic sealing gasket and butt joint structure of shield segments formed by same - Google Patents
Self-adhesive elastic sealing gasket and butt joint structure of shield segments formed by same Download PDFInfo
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- CN214244278U CN214244278U CN202022848521.6U CN202022848521U CN214244278U CN 214244278 U CN214244278 U CN 214244278U CN 202022848521 U CN202022848521 U CN 202022848521U CN 214244278 U CN214244278 U CN 214244278U
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Abstract
The utility model belongs to the technical field of waterproof material, specific saying relates to a shield of self-adhesive elastic seal pad and constitution constructs butt-joint structural of section of jurisdiction. The structure of the self-adhesive sealing gasket comprises a rubber base body and self-adhesive arranged on the surface of the rubber base body, wherein the sealing gasket formed by the rubber base body is in a strip shape, the self-adhesive is arranged on the upper end surface and the lower end surface of the sealing gasket, the upper part of the side surface of the sealing gasket is provided with an inward arc-shaped recess, and the lower part of the sealing gasket is provided with a deformation groove body; the butt joint structure of the shield segments is formed by arranging two self-adhesive elastic sealing gaskets of the structure in the butt joint seams of the adjacent shield segments, the self-adhesive layer on the lower end face of the butt joint structure is bonded with the prefabricated groove of the shield segments, and the self-adhesive layer on the upper end face of the butt joint structure is used for sealing and bonding when the adjacent shield segments are butted. The butt joint structure arranged in the shield pipe sheet has the characteristics of firm butt joint and adhesion, strong sealing and water stopping performance, high durability and long service life.
Description
Technical Field
The utility model belongs to the technical field of waterproof material, specific saying relates to a shield of self-adhesive elastic seal pad and constitution constructs butt-joint structural of section of jurisdiction.
Background
The rubber elastic sealing gasket is a mainstream material for sealing and stopping the shield segment, and the waterproof performance of the shield tunnel segment joint is improved by combining the water-absorbing rubber and the sealing gasket. Most of the existing elastic sealing gaskets are made of single porous ethylene propylene diene monomer or the porous ethylene propylene diene monomer and expansion rubber.
The current shield tunnel mostly adopts segment ring splicing construction, each ring generally consists of 3 standard blocks, 2 adjacent blocks and 1 capping block, a prefabricated groove is arranged at the periphery of each segment, an ethylene-propylene-diene monomer elastic sealing gasket is sleeved in the prefabricated groove, the elastic sealing gaskets respectively attached to the two segments are extruded to obtain a waterproof function when the segments are spliced, but the waterproof function is influenced by factors such as assembly force, the surface smoothness of the sealing gaskets and the like, water leakage often occurs between adjacent segments and between the ethylene-propylene-diene monomer elastic sealing gasket and the segments due to poor sealing, and the sealing performance at joints is greatly reduced; secondly, the rubber base body of the sealing gasket has weakened elastic capacity under the conditions of long-term extrusion and environmental erosion, and has the problems of mildewing and damage, and when the opening amount of the butt joint seam changes, the stress of the contact surface of the sealing gasket changes obviously, so that the strength of the butt joint structure of the shield segment is reduced, the service life of the shield segment is shortened, and the normal use of tunnel engineering is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an anti mould nature can be strong, elasticity is good, ageing-resistant and bond sealed firm self-adhesive elastic sealing pad to and set up the sealed adhesive structure of butt joint that forms in the shield constructs the section of jurisdiction with this self-adhesive elastic sealing pad.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a self-adhesive elastic sealing gasket, comprises rubber substrate and the self-adhesive that sets up on its surface, its characterized in that: the sealing gasket that the rubber substrate constitutes is the strip, self-adhesive sets up in the upper and lower terminal surface of this sealing gasket, the side upper portion of sealing gasket has inward arcuation sunken, and its lower part has the deformation cell body.
Two rows of through holes are formed in the cross section of the sealing gasket, the positions of the upper row of through holes correspond to the arc-shaped recesses, and the positions of the lower row of through holes correspond to the deformation groove body.
The utility model also provides a butt joint structure of shield structure section of jurisdiction sets up two as above in the butt joint of adjacent shield structure section of jurisdiction self-adhesive elastic sealing pad, the self-adhesive glue film of its lower terminal surface bonds with the prefabricated groove of shield structure section of jurisdiction, and the self-adhesive glue film of its up end is sealed when being used for adjacent shield structure section of jurisdiction butt joint and bonds.
The thickness of the self-adhesive rubber layer on the upper end surface of the self-adhesive elastic sealing pad is 0.5-0.8 mm, and the thickness of the self-adhesive rubber layer on the lower end surface of the self-adhesive elastic sealing pad is 1.0-1.5 mm.
The utility model provides a shield of self-adhesive elastic sealing pad and constitution constructs butt-joint structural of section of jurisdiction compares with prior art, has following advantage: the shield that has installed above-mentioned self-adhesive elastic sealing gasket section of jurisdiction has sticky sealed function, through from the viscose layer with firm bonding together between elastic sealing gasket base member and the shield section of jurisdiction and the elastic sealing gasket, blocked the infiltration passageway between the shield section of jurisdiction, the shield section of jurisdiction of this novel structure is convenient for be under construction, and waterproof sealing performance is excellent.
Drawings
FIG. 1 is a schematic structural view of a self-adhesive elastic sealing gasket of the present invention;
fig. 2 is a schematic view of a butt structure formed by the self-adhesive elastic sealing gasket and the shield segment.
Detailed Description
The self-adhesive elastic sealing gasket and the butt joint structure of the shield segments provided by the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the sealing gasket formed by the rubber base body is strip-shaped, the upper end surface and the lower end surface of the sealing gasket are provided with self-adhesive 2, the upper part of the side surface of the sealing gasket is provided with an inward arc-shaped recess 3, and the lower part of the sealing gasket is provided with a deformation groove body 4; the arc-shaped recesses 3 symmetrically arranged on the side faces of the sealing gasket improve the compression elasticity of the rubber base body, have high compressive strength and small compression deformation, ensure that the contact stress is not changed, keep the long-acting water stopping function through elastic compaction, and ensure that the elastic sealing gasket has excellent tear resistance and is fully deformed when the sealing structure is subjected to shearing stress, so that sufficient pressure contact can be maintained, and the sealing structure is not unstable.
Optionally, two rows of through holes 51 and 52 are formed in the cross section of the sealing gasket, the upper row of through holes 51 correspond to the arc-shaped recess 3, the lower row of through holes 52 correspond to the deformation groove body 4, the compression amount of the elastic sealing gasket is improved, the resilience performance is further enhanced, and the problems of stress relaxation and permanent deformation caused by long-term compression are solved.
As shown in fig. 2, the utility model also provides a butt joint structure of shield constructs section of jurisdiction sets up two above-mentioned self-adhesive elastic sealing gaskets in adjacent shield constructs section of jurisdiction 61's the butt joint, and the self-adhesive glue film 22 of its lower terminal surface bonds with shield constructs the prefabricated groove 62 of section of jurisdiction 61, and the self-adhesive glue film 21 of its up end is used for adjacent shield to construct sealing bonding when section of jurisdiction 61 docks.
The thickness of the self-adhesive layer 21 on the upper end face of the self-adhesive elastic sealing pad is 0.5 to 0.8mm, and the thickness of the self-adhesive layer 22 on the lower end face of the self-adhesive elastic sealing pad is 1.0 to 1.5 mm.
Specifically, the elastic sealing gasket is cut into four long strips according to the design size of the shield segment 61, and the length of the elastic sealing gasket is 2% -3% smaller than the corresponding design size of the shield segment; and then connecting the elastic sealing gaskets into a rectangle through hot vulcanization, laying the connected elastic sealing gaskets in a pouring mold, inserting an arc-shaped steel plate in the mold into a stretching groove, stretching the elastic sealing gaskets to the inner surface of the mold, removing the isolating film on the surface of the self-adhesive layer on the lower end surface after the fixation is finished, pouring, and maintaining to bond and fix the self-adhesive 22 on the lower end surface of the elastic sealing gaskets with the prefabricated groove of the shield segment 61. When the shield segments 61 are assembled, the upper end face isolation film is removed, so that the self-adhesive glue at the upper end parts are mutually bonded, and the butt joint sealing effect of the shield segments 61 is achieved.
Claims (4)
1. The utility model provides a self-adhesive elastic sealing gasket, comprises rubber substrate and the self-adhesive that sets up on its surface, its characterized in that: the sealing gasket that the rubber substrate constitutes is the strip, self-adhesive sets up in the upper and lower terminal surface of this sealing gasket, the side upper portion of sealing gasket has inward arcuation sunken, and its lower part has the deformation cell body.
2. The self-adhesive elastomeric gasket of claim 1, wherein: two rows of through holes are formed in the cross section of the sealing gasket, the positions of the upper row of through holes correspond to the arc-shaped recesses, and the positions of the lower row of through holes correspond to the deformation groove body.
3. The utility model provides a shield constructs butt-joint structural of section of jurisdiction that constitutes by self-adhesive elastic sealing pad which characterized in that: two self-adhesive elastic sealing gaskets according to claim 1 or 2 are arranged in butt joints of adjacent shield segments, self-adhesive layers on the lower end surfaces of the self-adhesive elastic sealing gaskets are adhered to prefabricated grooves of the shield segments, and self-adhesive layers on the upper end surfaces of the self-adhesive elastic sealing gaskets are used for sealing and adhering when the adjacent shield segments are butted.
4. A docking structure according to claim 3, wherein: the thickness of the self-adhesive glue layer on the upper end face of the self-adhesive elastic sealing pad is 0.5-0.8 mm, and the thickness of the self-adhesive glue layer on the lower end face of the self-adhesive elastic sealing pad is 1.0-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022848521.6U CN214244278U (en) | 2020-12-02 | 2020-12-02 | Self-adhesive elastic sealing gasket and butt joint structure of shield segments formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022848521.6U CN214244278U (en) | 2020-12-02 | 2020-12-02 | Self-adhesive elastic sealing gasket and butt joint structure of shield segments formed by same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214244278U true CN214244278U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022848521.6U Active CN214244278U (en) | 2020-12-02 | 2020-12-02 | Self-adhesive elastic sealing gasket and butt joint structure of shield segments formed by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214244278U (en) |
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2020
- 2020-12-02 CN CN202022848521.6U patent/CN214244278U/en active Active
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