CN213654872U

CN213654872U - Novel waterproof sealing gasket for ultrahigh water pressure shield tunnel segment joint

Info

Publication number: CN213654872U
Application number: CN202021102753.0U
Authority: CN
Inventors: 王宏超; 陈昂; 林本涛; 邸成; 朱宏; 熊国兴; 周良; 汪大海
Original assignee: Tieke Chuangheng New Material Technology Co ltd; Sichuan Ruitie Technology Co ltd
Current assignee: Tieke Chuangheng New Material Technology Co ltd; Sichuan Ruitie Technology Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-07-09
Anticipated expiration: 2030-06-15

Abstract

The utility model provides a novel waterproof sealing pad for super high water pressure shield tunnel section of jurisdiction seam to effectively improve the waterproof sealing effect of sealed pad, improve sealed pad atress deformability, satisfy the waterproof requirement of super high water pressure shield tunnel section of jurisdiction seam. The internal vertical interval of waterproof gasket sets up the stress release hole that vertically link up, characterized by: the waterproof sealing gasket body is formed by compounding a water-swelling rubber layer and an elastic rubber main body through one-time extrusion molding, and the upper surface and the lower surface of the waterproof sealing gasket body are planes; the stress release holes are arranged in the elastic rubber main body and comprise an upper layer stress release hole, a middle layer stress release hole and a lower layer stress release hole.

Description

Novel waterproof sealing gasket for ultrahigh water pressure shield tunnel segment joint

Technical Field

The utility model relates to a tunnel engineering field, in particular to a novel waterproof sealing pad that is used for super high water pressure shield tunnel section of jurisdiction seam.

Background

The shield tunnel construction method has the characteristics of trenchless construction, mechanized construction, low labor intensity, guaranteed engineering quality safety and the like, and is widely applied to tunnel engineering in the industries such as subway, highway, railway, water conservancy and the like in China in recent years.

Compared with tunnel construction methods using cast-in-place lining, such as a mine method and an open cut method, a shield tunnel basically adopts segment lining prefabricated in a factory and assembled on site. The construction quality of tunnel lining has been guaranteed on the one hand to prefabricated section of jurisdiction, has nevertheless reduced the wholeness in tunnel simultaneously, leads to there being a large amount of seams in the shaping tunnel. Taking a shield tunnel with the diameter of 6m of a subway as an example, a ring pipe piece is generally divided into 5-6 pieces, the length of a seam of each linear meter of tunnel can reach 18.6m according to the calculation of the ring width of 1.5m, and the seam is huge, so that the waterproof weak link of the shield tunnel is provided. Therefore, the existing shield tunnel water-proofing basically follows the principle of 'mainly using the self-waterproofing of the duct piece, mainly using the waterproofing of the joint and multiple fortification', wherein the waterproofing of the joint basically adopts the waterproof sealing gasket to extrude water.

From the actual operation condition of tunnel, under the low water pressure condition, current sealing pad can satisfy waterproof requirement basically, and the tunnel leakage point is less, but high water pressure shield tunnel leakage point is more, has aggravated the corrosion of equipment in the tunnel, and the operation expenses such as drainage of taking out simultaneously also increase by a wide margin.

In addition, the lower part of the existing waterproof sealing gasket is mostly in a sparse tooth-shaped design, and the waterproof sealing gasket is attached to a duct piece reserved groove by smearing a binder on an engineering site and then is assembled on the duct piece and fixed by bolts. The area of the sparse tooth-shaped end face is small, the smearing range of the binder is limited, so that the sealing gasket is not firmly bonded with the duct piece groove, the duct piece is easy to slide during assembling and extruding, and the sealing and water stopping performance is influenced. Meanwhile, the contact area between the sparse teeth and the duct piece grooves is too small, so that the local pressure at the position is too large during assembling, and the self stress performance of the material is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a novel waterproof sealing pad for super high water pressure shield tunnel section of jurisdiction seam is provided to effectively improve the waterproof sealing effect of sealed pad, improve sealed atress deformability of filling up, satisfy the waterproof requirement of super high water pressure shield tunnel section of jurisdiction seam.

The utility model provides a technical scheme that its technical problem adopted as follows:

the utility model discloses a novel waterproof sealing gasket for super high water pressure shield tunnel section of jurisdiction seam, this internal vertical interval of waterproof sealing gasket sets up the stress release hole that vertically link up, characterized by: the waterproof sealing gasket body is formed by compounding a water-swelling rubber layer and an elastic rubber main body through one-time extrusion molding, and the upper surface and the lower surface of the waterproof sealing gasket body are planes; the stress release holes are arranged in the elastic rubber main body and comprise an upper layer stress release hole, a middle layer stress release hole and a lower layer stress release hole.

The upper layer stress release hole, the middle layer stress release hole and the lower layer stress release hole are symmetrically arranged along the vertical central line of the cross section of the waterproof sealing gasket body and respectively comprise four stress release holes.

The utility model has the advantages that the contact surface between the waterproof sealing gasket body and the duct piece groove is enlarged, the coating range of the binder is larger when the sealing gasket is pasted, the bonding effect is better than the design of the existing comb-shaped sealing gasket, and the waterproof sealing effect of the sealing gasket on the duct piece joint is effectively improved; the local stress concentration at the lower part of the sealing gasket can be relieved, and the stress deformation performance of the sealing gasket is better; the waterproof sealing gasket body is formed by compounding the water-swelling rubber layer and the elastic rubber main body through one-time extrusion molding, and can meet the waterproof requirement of the ultrahigh water pressure shield tunnel segment joint by matching with the three layers of stress release holes.

Drawings

The specification includes the following figures:

FIG. 1 is a schematic cross-sectional view of a novel waterproof gasket for a segment joint of an ultrahigh water pressure shield tunnel according to the present invention;

the figures show the components and corresponding references: the rubber layer comprises a water-swellable rubber layer 11, an elastic rubber main body 12, an inverted triangle stress release hole 21, a right straight edge semicircular stress release hole 22, an isosceles right triangle stress release hole 23, an inverted straight edge semicircular stress release hole 24, a horseshoe-shaped stress release hole 25, an upper surface A, a contour line upper section B, a contour line middle section C, a contour line lower section D and a lower surface E.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. Referring to fig. 1, the utility model discloses a novel waterproof gasket for ultrahigh water pressure shield tunnel section of jurisdiction seam, this internal vertical interval of waterproof gasket sets up the stress release hole that vertically link up. The waterproof sealing gasket body is formed by compounding a water-swelling rubber layer 11 and an elastic rubber main body 12 through one-time extrusion molding, and the upper surface A and the lower surface E of the waterproof sealing gasket body are planes. The stress release holes are provided in the elastic rubber main body 12, and include an upper layer stress release hole, a middle layer stress release hole, and a lower layer stress release hole.

When the waterproof sealing gasket of water-swelling rubber was met in tradition area was produced, produce the sealing gasket body respectively and meet water-swelling rubber, rethread gluing agent manual work will meet water-swelling rubber and paste on the upper surface of sealing gasket body. The quality of the existing adhesive and the technical level of adhesion of workers are limited, and the water-swelling rubber is easy to separate from the sealing pad body after swelling in water, so that the waterproof performance of the joint is weakened. Referring to fig. 1, the utility model discloses in, waterproof sealing gasket body is by meeting water expansion rubber layer 11 and elastic rubber main part 12 once extrusion moulding complex as an organic whole, adopts coextrusion microwave vulcanization technology during production promptly, realizes once extruding, one shot forming, can effectively improve the waterproof sealing ability of sealed pad to the section of jurisdiction seam. The lower surface E of the sealing gasket body is a plane, the contact surface between the waterproof sealing gasket body and the duct piece groove is enlarged, the coating range of the binder is larger when the sealing gasket is pasted, the bonding effect is better than that of the conventional comb-shaped sealing gasket, and the waterproof sealing effect of the sealing gasket on the duct piece joint is effectively improved, so that the waterproof requirement of the ultra-high water pressure shield tunnel duct piece joint is met. The stress release hole is arranged in the elastic rubber main body 12 and comprises an upper layer stress release hole, a middle layer stress release hole and a lower layer stress release hole, and the stress deformation performance of the sealing gasket can be effectively improved.

Referring to fig. 1, the upper stress release hole, the middle stress release hole, and the lower stress release hole are symmetrically disposed along a vertical center line of a cross section of the waterproof gasket body, and each of the upper stress release hole, the middle stress release hole, and the lower stress release hole includes four stress release holes. The upper layer stress release holes are composed of inverted triangle stress release holes 21, straight-side semicircular stress release holes 22 and triangular stress release holes 21 which are sequentially arranged from left to right. The middle layer stress release hole is composed of an isosceles right triangle stress release hole 23, an inverted straight edge semicircle stress release hole 24 and the isosceles right triangle stress release hole 23 which are sequentially arranged from left to right. The lower stress release holes are formed by horseshoe-shaped stress release holes 25 which are arranged transversely at equal intervals. In order to reduce the stress concentration of the waterproof gasket body in the extruded state, the corners of the inverted-triangle stress release hole 21, the straight-side semicircular stress release hole 22, the isosceles right-angled triangle stress release hole 23, the inverted-straight-side semicircular stress release hole 24 and the horseshoe stress release hole 25 are all rounded corners.

Referring to fig. 1, the waterproof gasket body is symmetrical on the cross section along a vertical center line, and the profiles on the two sides of the waterproof gasket body are respectively an upper profile line section B, a middle profile line section C and a lower profile line section D. Contour line upper segment B begins in waterproof gasket body upper surface A and leans out, and contour line middle segment C begins in contour line upper segment B lower extreme and further leans out, and contour line hypomere D begins in contour line middle segment C lower extreme and leanin to waterproof gasket body lower surface E. In particular, the lower surface E of the waterproof gasket body is not of a conventional comb-tooth-shaped design, but is pulled through to increase the contact surface.

The material parameters and the size of the waterproof sealing gasket body are determined by means of numerical simulation, indoor compression, waterproof test, aging test and the like according to specific engineering requirements.

The elastic rubber main body 12 is made of any one or more of ethylene propylene diene monomer, chloroprene rubber and silicon rubber.

The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the claimed patent scope of the present invention.

Claims

1. The utility model provides a novel waterproof sealing gasket for ultrahigh water pressure shield tunnel section of jurisdiction seam, this internal vertical interval of waterproof sealing gasket sets up the stress release hole that vertically link up, characterized by: the waterproof sealing gasket body is formed by compounding a water-swelling rubber layer (11) and an elastic rubber main body (12) into a whole through one-step extrusion molding, and the upper surface (A) and the lower surface (E) of the waterproof sealing gasket body are planes; the stress release holes are arranged in the elastic rubber main body (12) and comprise an upper layer stress release hole, a middle layer stress release hole and a lower layer stress release hole.

2. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 1, which is characterized in that: the upper layer stress release hole, the middle layer stress release hole and the lower layer stress release hole are symmetrically arranged along the vertical central line of the cross section of the waterproof sealing gasket body and respectively comprise four stress release holes.

3. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 2, wherein: the upper layer stress release holes are composed of inverted triangle stress release holes (21), straight-side semicircular stress release holes (22) and triangle stress release holes (21) which are sequentially arranged from left to right.

4. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel according to claim 3, which is characterized in that: the middle layer stress release hole is composed of an isosceles right triangle stress release hole (23), an inverted straight edge semicircular stress release hole (24) and an isosceles right triangle stress release hole (23) which are sequentially arranged from left to right.

5. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 4, wherein: the lower layer stress release holes are formed by horseshoe-shaped stress release holes (25) which are transversely arranged at equal intervals.

6. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 5, wherein: the corners of the inverted triangle stress release hole (21), the straight-side semicircular stress release hole (22), the isosceles right triangle stress release hole (23), the inverted straight-side semicircular stress release hole (24) and the horseshoe stress release hole (25) are all rounded corners.

7. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 1, which is characterized in that: the waterproof sealing gasket body is symmetrical on the cross section along a vertical center line, and the outlines on the two sides of the waterproof sealing gasket body are respectively an outline upper section (B), an outline middle section (C) and an outline lower section (D); contour line upper segment (B) is originated in waterproof sealing gasket body upper surface (A) and leans out, and contour line middle section (C) is originated in contour line upper segment (B) lower extreme and further leans out, and contour line hypomere (D) is originated in contour line middle section (C) lower extreme and leanin to waterproof sealing gasket body lower surface (E).

8. The novel waterproof gasket for the segment joint of the ultrahigh water pressure shield tunnel as claimed in claim 1, which is characterized in that: the elastic rubber main body (12) is made of any one of ethylene propylene diene monomer, chloroprene rubber and silicon rubber.