CN217558334U - Sealing structure of porous rubber sealing gasket and shield tunnel segment joint - Google Patents

Abstract

The utility model belongs to the technical field of shield method tunnel engineering, specific saying relates to a seal structure of porous rubber seal pad and shield method tunnel segment seam. The cross section of the rubber matrix comprises a deformation compaction area, a compression positioning area and a stress supporting area positioned in the middle; the deformation compaction area and the compression positioning area both comprise round corner equilateral triangle through holes in the middle and round corner obtuse triangle through holes on two sides, and round through holes are arranged between the round corner equilateral triangle through holes and the round corner obtuse triangle through holes or between the round corner equilateral triangle through holes or on two sides of the compression positioning area; the stress supporting area comprises at least two rows of round-angle equilateral triangle through holes which are arranged in a socket and spigot staggered manner. The porous rubber sealing gasket improves the contact stress and the structural stability by improving the pore shape and the arrangement mode, has high effective stress occupation ratio of the contact surface, is fully attached to the contact surface of the shield tunnel segment and is firmly bonded, and the formed sealing structure has long-acting and stable whole waterproof performance.

Description

Sealing structure of porous rubber sealing gasket and shield tunnel segment joint

Technical Field

The utility model belongs to the technical field of shield method tunnel engineering, specific saying relates to a seal structure of porous rubber seal pad and shield method tunnel segment seam.

Background

The shield method tunnel water-proofing comprises the following main aspects of segment structure self-waterproofing, segment seam waterproofing, butt bolt hole waterproofing and the like, wherein segment seam sealing is the key of shield method tunnel water-proofing. At present, a porous rubber sealing gasket becomes an important component of shield tunnel water prevention, and the porous rubber sealing gasket is also called a rubber elastic sealing gasket, is a mainstream material for sealing and stopping a spliced tunnel segment, and is generally processed by single porous ethylene propylene diene monomer rubber or compounded by the porous ethylene propylene diene monomer rubber and expanded rubber.

Most of rubber gaskets used in tunnel segment joints of shield tunnel in the prior art are Xie Si field-type structures, holes which are symmetrical by a plurality of centers and have different shapes are formed in the cross section of each rubber gasket, the height of each gasket is properly increased, the lower end face (namely the contact face with a segment groove) of each rubber gasket is a plurality of open door-shaped hole grooves, the rubber gaskets are bonded with the segment grooves by adopting neoprene adhesive generally, the upper end faces of the rubber gaskets arranged in the grooves on the two sides of the joints are tightly pressed and tightly attached through segment assembling extrusion force, the gaskets are tightly attached to the segment concrete contact face, water pressure resistance is provided by virtue of compression counter force of the gaskets, and the purposes of sealing and water proofing are achieved.

At present, the research and improvement on the opening rate and the pore structure of the rubber sealing gasket are less, the hole pattern is mainly circular, and the actual use process finds that the deformation capacity and the arrangement form of the hole pattern are important for the compression counter force, the effective stress ratio of the contact surface and the sealing performance of the rubber sealing gasket, for example, the opening rate and the deformation capacity of the pore structure are inversely related to the compression counter force and the sealing performance of the sealing gasket; the number of layers in the arrangement form has great influence on the structural stability and the effective stress ratio of the contact surface, and the structure instability is easily caused when the number of layers is large, but the increase of the effective stress ratio of the contact surface is generally facilitated.

The existing rubber sealing gasket mainly has the following problems in engineering application: firstly, insufficient contact stress and poor sealing performance caused by unreasonable design of the opening rate and the pore structure; secondly, the structural stability and the effective stress proportion compatibility of the contact surface are poor due to unreasonable matching of the layer number design and the hole number in the arrangement form; thirdly, the traditional adhesives such as neoprene aldehyde and the like are rigid materials after being cured, the adhesion strength of the traditional adhesives and the rubber sealing gasket is insufficient, the slippage and the dislocation between the sealing gasket and the duct piece are easily caused, and the shrinkage crack formed between the duct piece and the rubber sealing gasket due to different thermal expansion coefficients cannot be well closed, so that the overall waterproof performance of the sealing gasket is reduced; and the fourth step is an open groove structure of the lower end face of the Xie Si field-type end face structure, is easy to incline and deform under pressure, and then generates a contact gap between the groove structure and the shield segment, so that the structural stability of the rubber sealing gasket is poor, the effective stress ratio of the contact surface is reduced, the rubber sealing gasket is insufficiently and not tightly contacted with the shield segment, and the waterproof effect is remarkably reduced.

For example, the utility model with the patent number CN201920739524.0 discloses a self-adhesive water-swelling composite shield segment rubber gasket, although a water-swelling rubber layer is arranged on one side of the outer surface of the gasket body to form a composite waterproof structure, after water-swelling rubber absorbs water, the rubber strength is remarkably reduced, stress relaxation and creep deformation are easily generated, and after repeated water absorption, water absorption components in a sealing material can cause phase separation and precipitation, so that the waterproof performance of the rubber gasket is greatly reduced, and the service cycle is remarkably shortened; moreover, the section of the sealing gasket body adopts a typical Xie Si field-shaped end face, the product does not have structural improvement on the opening rate and the pore shape so as to improve the sealing and waterproof effects, and the defects of the problems still exist after the product is used for a period of time.

Disclosure of Invention

The utility model aims at providing a through improving hole shape and the mode of arranging, improve the sealed contact stress and the structural stability of pad of porous rubber to contact surface effective stress accounts for the relative altitude, with the shield structure method tunnel segment contact surface fully laminate, it is firm to bond, the long-term stable novel pad of porous rubber of whole waterproof performance and use the seal structure at shield structure method tunnel segment seam.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a porous rubber sealing gasket, includes the rubber substrate and set up in the stress adjustment district that constitutes by multirow through-hole of rubber substrate cross-section, its characterized in that: the stress adjusting area comprises a deformation pressing area and a compression positioning area which are respectively positioned below the upper end surface and above the lower end surface, and a stress supporting area is positioned between the deformation pressing area and the compression positioning area; wherein, the lower end face is a horizontal closed face and the surface of the lower end face is provided with an adhesive layer.

The additional technical features constituting the above porous rubber gasket further include:

the deformation compression area and the compression positioning area respectively comprise a plurality of round-angle equilateral triangle through holes in the middle and round-angle obtuse triangle through holes on two sides, and round through holes are formed between the round-angle equilateral triangle through holes of the compression positioning area and the round-angle obtuse triangle through holes or between the round-angle equilateral triangle through holes or on two sides of the compression positioning area; the stress supporting area comprises at least two rows of round-angle equilateral triangle through holes which are arranged in a socket and spigot staggered manner;

the cross section of the rubber base body is a concave polygonal profile and comprises an upper end face and a lower end face which are parallel to each other, two sides of the rubber base body are symmetrical four-endpoint stepped broken lines, and through holes in the cross section of the rubber base body are symmetrically distributed along a vertical central line;

the sharp ends of the rounded equilateral triangle through holes in the deformation compaction area and the compression positioning area are opposite, the bottom surfaces of the rounded equilateral triangle through holes are respectively parallel to the upper end surface and the lower end surface, and the obtuse angles of the rounded obtuse triangle through holes in the deformation compaction area and the compression positioning area are respectively close to the edges of the upper end surface and the lower end surface;

the bottom edges of the two rows of the round-corner equilateral triangle through holes of the stress supporting area are respectively parallel to the upper end surface and the lower end surface of the rubber substrate, and the length of the connecting line of the centers of the bottom edges of the three adjacent round-corner equilateral triangle through holes is equal;

the staggered socket depth of the two rows of the round-angle equilateral triangle through holes forming the stress supporting area in the vertical direction is 50% +/-10% of the height of the round-angle equilateral triangle;

the adhesive layer is non-asphalt-based high-molecular pressure-sensitive self-adhesive with the thickness of 0.8mm to 1.0mm.

The utility model also provides a seal structure of shield method tunnel segment seam, its characterized in that: and symmetrically arranging the two porous rubber gaskets at the joint of the duct pieces, wherein the lower end surfaces of the porous rubber gaskets are arranged in the duct piece grooves and are fixed in place through the bonding layers, and the upper end surfaces of the porous rubber gaskets are mutually compressed to realize sealing.

The additional technical characteristics of the shield tunnel segment joint sealing structure further comprise:

the deformation compaction area of the porous rubber sealing gasket comprises two round corner equilateral triangle through holes in the middle and round corner obtuse triangle through holes on two sides respectively; the compression positioning area comprises a round corner equilateral triangle through hole in the middle and round corner obtuse triangle through holes on two sides of the round corner equilateral triangle through hole respectively, and a circular through hole is arranged between the round corner equilateral triangle through hole and the round corner obtuse triangle through hole or is arranged on the outer side of the round corner obtuse triangle through hole; the stress supporting area comprises an upper row of three round-corner equilateral triangle through holes and a lower row of four round-corner equilateral triangle through holes;

the area of the circular through holes arranged at the two sides close to the compression positioning area is 30% +/-10% of the area of the round-corner equilateral triangle through holes or the round-corner obtuse triangle through holes.

Compared with the prior art, the utility model provides a porous rubber sealing gasket has following advantage:

the utility model discloses change the profile of tooth structure (open slot) of terminal surface under the porous sealing pad of current into closed (plane) structure, make lower terminal surface and shield structure section of jurisdiction contact more abundant, the distribution of contact stress is more even, because the through-hole passes through the difference in pore shape and the mode of arrangement in the rubber substrate cross-section of this novel porous rubber sealing pad, form deformation clamping area, stress supporting area and compression positioning area, deformation clamping area and compression positioning area all include a plurality of fillet equilateral triangle through-holes that are located in the middle and the fillet obtuse triangle through-hole that is located both sides, this kind of through-hole mode aims at reducing the compression counter-force, improve effective contact stress ratio, ensure that the upper end near deformation clamping area compresses tightly each other and pastes the reality, waterproof seal is long-term stable, the lower end near compression positioning area elastically deforms and pastes in the section of jurisdiction, ensure that the sealed pad overall structure is firm; secondly, round through holes are arranged between the round-corner equilateral triangle through hole and the round-corner obtuse triangle through hole or between the round-corner equilateral triangle through holes or at two sides of the compression positioning area, the strength of positioning contact is further improved, the foundation supporting effect is better, the structure collapse phenomenon is not easy to occur, especially, a closed plane is adopted on the lower end surface, compared with the traditional Xie Si field type open groove section, the overall structure strength is high, the sealing gasket structure stability is excellent in the multi-direction deformation processes of compression, expansion or shearing and the like, after the sealing gasket is further fixed with the duct piece groove through the bonding layer, the connection strength is high, the contact stress is larger, the waterproof performance is better, meanwhile, the compression counter force of the deformation compression area and the compression positioning area is within the conventional use range, the installation closing force is small, and the installation is convenient, and the contact stress ratio with the duct piece is better; thirdly, the stress supporting area comprises at least two rows of through holes of the equilateral triangles with round corners arranged in a socket-and-spigot staggered manner, and through the matrix arrangement of the equilateral triangles with round corners, the elastic deformation is balanced in the vertical, transverse or longitudinal deformation process, the stress distribution is uniform, the anti-supporting effect is obvious, the problems of cushion strip torsion, dislocation falling and the like are not easy to occur, stable supporting force is always provided for two end faces, the upper end face is tightly pressed and attached, and the lower end face is firmly attached; finally, the two porous rubber sealing gaskets are symmetrically arranged at the joint of the duct pieces to form a sealing structure of the joint of the duct pieces of the tunnel in the shield method, the lower end surfaces of the two porous rubber sealing gaskets are arranged in a duct piece groove and are fixed in place through a bonding layer, the upper end surfaces of the two porous rubber sealing gaskets are mutually compressed to realize sealing, the elastic deformation of the through hole structures of the deformation compression area of the upper end surface and the compression positioning area of the lower end surface is excellent, the compression counter force is small, the two porous rubber sealing gaskets are easy to close and install, the effective contact stress occupancy ratio is high, the triangular through hole matrix of the middle stress supporting area provides stable and balanced supporting force, when the distance between the duct pieces changes, the upper end surface and the lower end surface are ensured to always keep enough and effective stress extrusion, and the long-acting sealing and waterproof effects are realized.

In conclusion, the structural stability of the rubber sealing gasket is better and the effective stress ratio of the contact surface is higher through the design of the arrangement form, the number of layers, the pore structure and the number of the stress adjusting pores in the section of the sealing gasket; the utility model changes the prior neoprene phenolic rigid adhesive into non-asphalt based high polymer pressure-sensitive self-adhesive, and closes the shrinkage crack formed between the duct piece and the rubber sealing gasket caused by different thermal expansion coefficients, so that the contact surface between the rubber sealing gasket and the duct piece of the shield tunnel is more sufficient and the bonding is more compact, and the whole waterproof performance is more excellent; the utility model discloses the structure is regular, simple manufacture, the construction of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a porous rubber gasket of the present invention;

FIG. 2 is a schematic view of the porous rubber gasket applied to a sealing structure of a shield tunnel segment joint (initial installation and compression state comparison view);

FIG. 3 is a schematic view showing a finite element analysis of the porous rubber gasket example 1 and a comparative example;

FIG. 4 is a schematic structural view of embodiment 2 of the porous rubber gasket;

FIG. 5 is a schematic structural view of embodiment 3 of the porous rubber gasket;

FIG. 6 is a schematic view showing the structure of a rubber gasket of a comparative example.

Detailed Description

The structure and operation of the porous rubber gasket according to the present invention will be described in further detail with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, the utility model provides a porous rubber sealing gasket, this porous rubber sealing gasket's concrete structure includes rubber base 1 and sets up in the stress adjustment district that constitutes by multirow through-hole of rubber base 1 cross-section to the through-hole is evenly distributed in the cross-section, and the stress adjustment district includes deformation pressing zone 21 and the compression locating area 22 that are located up end 11 below and down end 12 respectively, is stress supporting zone 23 between deformation pressing zone 21 and the compression locating area 22; wherein, the lower end face 12 is a horizontal closed face and the surface thereof is provided with an adhesive layer 3;

the deformation pressing area 21 comprises two round corner equilateral triangle through holes 41 in the middle and round corner obtuse triangle through holes 42 on two sides respectively; the compression positioning area 22 comprises a round-corner equilateral triangle through hole 51 positioned in the middle and round-corner obtuse triangle through holes 52 respectively positioned on two sides of the round-corner equilateral triangle through hole, and a circular through hole 53 is arranged between the round-corner equilateral triangle through hole and the round-corner obtuse triangle through hole; the stress-bearing zone 23 comprises an upper row of three rounded equilateral triangular through-holes 61 and a lower row of four rounded equilateral triangular through-holes 62.

Fig. 2 shows that the two porous rubber gaskets are symmetrically arranged at the joint of the tunnel segment a in the shield tunnel method to form a novel sealing structure, the method comprises the steps of arranging the lower end surface 12 of each porous rubber gasket in the segment groove b and fixing the porous rubber gasket in place through the bonding layer 3, and mutually compressing the upper end surfaces 11 of the porous rubber gaskets to realize sealing.

According to the technical scheme, because the deformation compresses tightly the mode that district 21 and compression positioning district 22's through-hole adopted fillet triangle and obtuse triangle to combine, its elastic deformation is efficient, the compression counter-force is little, easily closed installation, and contact stress percentage is high, lower terminal surface 12 that is close to compression positioning district 22 sets up a circular through-hole 53 for the seal plane and between fillet equilateral triangle through-hole 51 and fillet obtuse triangle through-hole 52, the area of contact of lower terminal surface 12 with section of jurisdiction slot b has been increased, it can strong to warp adaptability, location structure is more stable.

In the structure constituting the above-described porous rubber packing,

the cross section of the rubber matrix 1 is a concave polygonal profile and comprises an upper end surface 11 and a lower end surface 12 which are parallel to each other, two sides of the cross section are symmetrical four-endpoint stepped broken lines, and through holes in the cross section of the rubber matrix 1 are uniformly distributed and symmetrically distributed along a vertical center line;

specifically, the four-endpoint stepwise type broken line has the structural style as follows: the cross section of the rubber matrix 1 comprises an upper trapezoid 71, a middle widening trapezoid 72 and a lower inverted trapezoid 73 which are sequentially butted, through holes in the cross section of the rubber matrix 1 are symmetrically distributed along a vertical central line, specifically, the height ratio of the upper trapezoid 71, the middle widening trapezoid 72 and the lower inverted trapezoid 73 is (1.4-1.6) to 1 (1.4-1.6), and the length ratio of the bottom edges of the upper trapezoid 71, the middle widening trapezoid 72 and the lower inverted trapezoid 73 is 1: (1.2-1.4): (1.2-1.4), namely the outline of the rubber matrix 1 is a concave polygon, the side edge is a four-end-point step-type broken line, the whole structure is uniformly dispersed under pressure, the elastic deformation effect of the upper trapezoid 71 and the lower inverted trapezoid 73 is outstanding, the upper end face 11 is pressed and attached, the lower end face 12 is firmly deformed and positioned, the stress support of the lower inverted trapezoid 73 is uniform and stable, and the effective contact stress ratio is high;

preferably, the aperture ratio of the rubber matrix 1 is between 35% and 45%, the through holes are uniformly distributed on the cross section of the rubber matrix 1, in order to ensure that the elastic deformation and the effective stress supporting function are distinguished, the aperture ratios of the deformation compression area 21 and the compression positioning area 22 are not higher than the aperture ratio of the stress supporting area 23, the phenomenon that the difference of the compression ratios of the through holes at all parts in the cross section is too large is prevented, approximate synchronous compression deformation is realized, and the structural stability is improved;

specifically, the tips of the rounded equilateral triangle through holes (41, 51) located in the deformation compressing region 21 and the compression positioning region 22 are opposite (in this embodiment, the directions are opposite), the bottom surfaces of the rounded equilateral triangle through holes are respectively parallel to the upper end surface 11 and the lower end surface 12, the obtuse angles of the rounded obtuse triangle through holes (42, 52) of the deformation compressing region 21 and the compression positioning region 22 are respectively close to the edges of the upper end surface 11 and the lower end surface 12, and the hole pattern arrangement mode makes the edges of the triangles parallel to the upper end surface 12, the lower end surface 12 and the slopes on both sides of the contour as much as possible, so that the stress area is large, the effective contact stress distribution is uniform, the compression deformation is synchronous and consistent, and the phenomena of partial collapse and distortion of the end surfaces or the side surfaces of the contour are not easy to occur;

furthermore, the bottom sides of the two rows of circular-corner equilateral triangle through holes (61, 62) of the stress supporting area 23 are respectively parallel to the upper end surface 11 and the lower end surface 12 of the rubber substrate 1, that is, the tips of the upper and lower rows of circular-corner equilateral triangle through holes (61, 62) are socket-jointed and staggered to form a comb structure, when the rubber substrate is compressed by vertical stress, the deformation is uniform, the stress distribution is balanced, and continuous strong stress support is provided for the upper and lower ends, and the length of the connecting line of the centers of the horizontal bottom sides of the three adjacent circular-corner equilateral triangle through holes is equal, that is, the connecting line of the centers of the two upper rows of adjacent circular-corner equilateral triangles and the lower row of circular-corner equilateral triangles sandwiched between the two upper rows of adjacent circular-corner equilateral triangles (or the upper row of circular-corner equilateral triangles and the lower row of two circular-corner equilateral triangles positioned at both sides of the upper row of adjacent circular-corner equilateral triangle through holes is equidistant, so that the distribution of the circular-corner equilateral triangles in the stress supporting area 23 is ensured to be uniform, the compression deformation and the stress generation efficiency are considered, and the durability of the motion structure is good;

specifically, the staggered socket depth of the two rows of round-corner equilateral triangle through holes (61, 62) forming the stress supporting area 23 in the vertical direction is 50% +/-10% of the height of the round-corner equilateral triangle, so that the compactness of the stress supporting structure is improved, the deformation amplitude and the stress dispersion are more regular, the supporting strength is balanced, long-acting and stable in the using process, and the sealing and waterproof effects are excellent;

compared with the traditional neoprene rigid adhesive, in the embodiment, the non-asphalt-based high-molecular pressure-sensitive self-adhesive is selected for the adhesive layer 3 arranged on the lower end face 12 of the rubber sealing gasket, the thickness of the adhesive layer is 0.8mm to 1.0mm, and the non-asphalt high-molecular pressure-sensitive adhesive covers the shrinkage crack formed between the pipe piece and the rubber sealing gasket due to different thermal expansion coefficients, so that the rubber sealing gasket is in more complete contact with the pipe piece of the shield-method tunnel and is bonded more tightly, and the integral waterproof performance is better;

as shown in FIG. 3, the effective stress ratio of the contact surface of the rubber gasket is calculated by finite element simulation analysis, and the comparative example is a Xie Si field section rubber gasket which is common in the existing market. Can learn by the figure, compare with the comparative example, embodiment 1 stress control hole warp more evenly, and the compression is more closely pasted, and rubber seal pad's overall structure stability is better, and is more abundant, inseparabler with the contact of tunnel section of jurisdiction, and whole waterproof performance is more excellent.

Example 2

As shown in fig. 4, different from the structure of embodiment 1, the compression positioning area 22 of this embodiment includes a round-corner equilateral triangle through hole 51 located in the middle and round-corner obtuse triangle through holes 52 located at both sides thereof, and the outer round through holes 53 of the round-corner obtuse triangle through holes 52, that is, the round through holes 53 are disposed in the areas close to both side edges of the compression positioning area 22, so as to reduce the compression amount of both side edges of the lower end surface 12 of the gasket, and prevent the deformation amplitude from being too large, thereby damaging the structure of the gasket groove b or the rubber substrate 1 itself;

example 3

As shown in fig. 5, compared with embodiment 2, in this embodiment, the areas of the circular through holes 53 disposed near the two sides of the compression positioning region 22 are 30% ± 10% of the areas of the rounded equilateral triangle through holes 51 or the rounded obtuse triangle through holes 52, that is, the pore areas of the circular through holes 53 are adjusted to be reduced to a reasonable interval, so as to provide sufficient effective stress support and prevent the lower end surface 12 of the gasket from being twisted and damaged;

experimental test data for examples 1-3 and comparative examples are shown below:

effective stress ratio of contact surface/%: example 1 is 82, example 2 is 82, example 3 is 85, comparative example 56;

contact stress/Mpa: 3.8 for example 1, 3.6 for example 2, 4.2 for example 3, 1.2 for comparative example;

compression reaction force/kN/m: example 1 is 55, example 2 is 56, example 3 is 58, comparative example 39;

and shield segment shear strength N/mm: example 1 is 10.9, example 2 is 11.2, example 3 is 11.5, comparative example is 5.2;

wherein the contact stress is according to a water pressure resistant simulation test method in appendix A of GB/T18173.4-2010; the compressive counter force is according to a GB/T18173.4-2010 appendix B compressive stress simulation test method;

the shear strength of the shield segment is tested according to Q/CR562.2-2017 appendix B and post-cast concrete shear strength;

as shown in fig. 6, the comparative example is a commonly used rubber gasket for a shield tunnel segment joint on the market, and the section of the body 8 of the rubber gasket adopts a structure of 'Xie Si field', and consists of an upper end surface 81, a deformation hole 82 and a lower end surface 84 of a 'gate-shaped hole groove' 83. The lower end surface 84 of the rubber gasket gate-shaped hole groove is bonded with the duct piece joint groove through a chloroprene phenol adhesive.

Compared with a comparative example, the embodiment 1, the embodiment 2 and the embodiment 3 have higher effective stress ratio of the contact surface, high bonding strength with the shield segment, larger contact stress and better waterproof performance, and the compression counter force is in the use range of the shield machine, so that the shield machine is convenient to install and has better contact stress effect with the segment.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a porous rubber sealing gasket, includes the rubber substrate and set up in the stress adjustment district that constitutes by multirow through-hole of rubber substrate cross-section, its characterized in that: the stress adjusting area comprises a deformation pressing area and a compression positioning area which are respectively positioned below the upper end surface and above the lower end surface, and a stress supporting area is positioned between the deformation pressing area and the compression positioning area; wherein, the lower end face is a horizontal closed face and the surface of the lower end face is provided with an adhesive layer.

2. The porous rubber gasket according to claim 1, wherein: the deformation compression area and the compression positioning area both comprise a plurality of fillet equilateral triangle through holes in the middle and fillet obtuse triangle through holes on two sides, and circular through holes are arranged between the fillet equilateral triangle through holes and the fillet obtuse triangle through holes or between the fillet equilateral triangle through holes or on two sides of the compression positioning area; the stress supporting area comprises at least two rows of round-angle equilateral triangle through holes which are arranged in a socket and spigot staggered manner.

3. The porous rubber gasket according to claim 1, wherein: the cross section of the rubber base body is a concave polygonal outline and comprises an upper end face and a lower end face which are parallel to each other, four symmetrical end point step-type broken lines are arranged on two sides of the cross section of the rubber base body, and through holes in the cross section of the rubber base body are symmetrically distributed along a vertical central line.

4. The porous rubber gasket according to claim 1, wherein: the deformation compresses tightly the most advanced relatively of fillet equilateral triangle through-hole in district and compression positioning district, its bottom surface respectively with up end and terminal surface are parallel down, the deformation compresses tightly the obtuse angle of the fillet obtuse triangle through-hole in district and compression positioning district and is close to respectively the edge of up end and terminal surface down.

5. The porous rubber gasket according to claim 1, wherein: the base sides of the two rows of the round-angle equilateral triangle through holes in the stress supporting area are respectively parallel to the upper end surface and the lower end surface of the rubber substrate, and the length of the connecting line of the center of the base sides of the three adjacent round-angle equilateral triangle through holes is equal.

6. The porous rubber gasket according to claim 5, wherein: the staggered socket depth of the two rows of the round-corner equilateral triangle through holes forming the stress supporting area in the vertical direction is 50% +/-10% of the height of the round-corner equilateral triangle.

7. The porous rubber gasket according to claim 1, wherein: the adhesive layer is non-asphalt-based high-molecular pressure-sensitive self-adhesive with the thickness of 0.8mm to 1.0mm.

8. The utility model provides a seal structure of shield method tunnel segment seam which characterized in that: two porous rubber gaskets according to claims 1 to 7 are symmetrically arranged at the joint of the pipe pieces, wherein the lower end surfaces of the porous rubber gaskets are arranged in the grooves of the pipe pieces and are fixed in place through the bonding layers, and the upper end surfaces of the porous rubber gaskets are mutually pressed to realize sealing.

9. The sealing structure of a shield-method tunnel segment joint according to claim 8, characterized in that: the deformation compaction area of the porous rubber sealing gasket comprises two round-corner equilateral triangle through holes positioned in the middle and round-corner obtuse triangle through holes respectively positioned on two sides; the compression positioning area comprises a fillet equilateral triangle through hole in the middle and fillet obtuse triangle through holes on two sides of the fillet equilateral triangle through hole respectively, and a circular through hole is arranged between the fillet equilateral triangle through hole and the fillet obtuse triangle through holes or is arranged on the outer side of the fillet obtuse triangle through hole; the stress supporting area comprises three round-corner equilateral triangle through holes arranged on the upper row and four round-corner equilateral triangle through holes arranged on the lower row.

10. The sealing structure of a shield-method tunnel segment joint according to claim 9, characterized in that: the area of the circular through holes arranged close to the two sides of the compression positioning area is 30% +/-10% of the area of the circular equilateral triangle through holes or the circular obtuse triangle through holes.

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