CN218816445U - Seam waterproof system of shield tunnel segment - Google Patents

Abstract

The utility model provides a waterproof system for joints of shield tunnel segments, which relates to the technical field of shield method tunnel engineering and comprises splicing joints, outer sealing strips, middle sealing strips, force transmission gaskets, inner sealing strips and inner embedded sealing glue; the outer sealing strip, the outer sealing gasket, the middle sealing strip, the force transmission gasket, the inner sealing strip and the inner embedded sealant are sequentially arranged in the splicing seam along the direction from the outer side to the inner side. The utility model provides a seam waterproof system improves the homogeneity of the indirect contact pressure stress of section of jurisdiction through the seam waterproof system who comprises multichannel seal structure to still can reach higher waterproof ability behind the ratio of the sealing pressure that realizes reducing seal structure and the water pressure of seting up defences, and then reach and improve sealing materials such as rubber and lead to the problem that waterproof ability descends because of creep and stress relaxation.

Description

Seam waterproof system of shield tunnel segment

Technical Field

The utility model relates to a shield constructs method tunnel engineering technical field, especially relates to a seam waterproof system of shield tunnel section of jurisdiction.

Background

The shield tunnel adopts a prefabricated segment splicing mode, and the size of each segment cannot be overlarge, so that the number of splicing seams of the segments of the tunnel is large. The splicing seam water stopping measure mainly comprises an outer side water stopping strip, a rubber sealing gasket, bolt water stopping and an inner side caulking seam.

The main form of the existing shield tunnel segment joint waterproof system comprises an inner elastic rubber sealing gasket, an outer water stop strip, an elastic rubber sealing gasket, two water stop strips, an elastic rubber sealing gasket, one water stop strip and the like. Generally, based on the compression sealing principle of sealing materials such as rubber, the designed sealing pressure of the rubber is correspondingly increased along with the increase of the water-proof pressure, and the designed sealing pressure of the rubber is 2 times of the water-proof pressure in consideration of the influences of creep, aging and the like of rubber materials. The problems in the engineering application of the design method are as follows: the excessive design sealing pressure can increase the difficulty of the installation and construction of the duct piece, and increase the problems of abrasion, dislocation and the like of the duct piece sealing material; excessive design sealing pressure may also cause abnormal damage to the segment; the rubber sealing gasket is in a compression state for a long time, the rubber can generate a compression stress relaxation phenomenon in the using process, the creep and the stress relaxation of sealing materials such as the rubber can be accelerated by the overlarge designed sealing pressure, so that the attenuation of the sealing pressure and the reduction of the waterproof capacity are caused, and on the basis, a novel joint waterproof system is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a seam waterproof system of shield tunnel section of jurisdiction to solve the problem that above-mentioned prior art exists, improve the homogeneity of the indirect contact pressure stress of section of jurisdiction through the seam waterproof system who comprises multichannel seal structure, still can reach higher waterproof ability behind the ratio of the sealing pressure that realizes reducing seal structure and the water pressure of seting up defences, and then reach and improve the problem that sealing materials such as rubber lead to waterproof ability to descend because of creep and stress relaxation.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a waterproof system for seams of shield tunnel segments, which comprises splicing seams, outer sealing strips, outer sealing gaskets, middle sealing strips, force transmission gaskets, inner sealing strips and inner embedded sealing glue; the splicing seam is formed between the two spliced pipe pieces, two opposite outer channels of grooves are formed in the parts, close to the outer sides, of the end faces of the two spliced pipe pieces, the outer channel sealing gaskets are fixedly arranged in the two outer channels of grooves, and the outer channel sealing strips and the middle sealing strips are respectively arranged in the splicing seams on the two sides of the outer channel sealing gaskets;

two the terminal surface that the pipe sheet spliced mutually is close to inboard part and has set gradually two relative inside channels slot and two inboard caulking groove that set up relatively along the outside to inboard direction, the inside channel is sealed to be fixed set up in two in the inside channel inslot, the inside channel sealing strip fixed set up in the inside channel slot is kept away from inboard caulking groove one side in the concatenation seam, inboard embedded sealant is arranged in two in the inboard caulking groove, the biography power liner set up in the middle part sealing strip with between the inside channel is sealed in the concatenation seam.

Preferably, the outer sealing strip, the outer sealing gasket, the middle sealing strip, the inner sealing gasket and the inner sealing strip are all arranged in pairs and oppositely.

Preferably, the outer lane is sealed to seal up with the inner lane is sealed to seal up and is a self-adhesive elastic rubber packing pad, two the outer lane is sealed to seal up and is autohesized respectively two the outer lane is downthehole, two the inner lane is sealed to seal up and autohesized respectively two in the inner lane slot.

Preferably, self-adhesive elastic rubber sealing pad includes rubber sealing pad body and adhesive layer, the rubber sealing pad body includes up end, lower terminal surface and sets up in the up end with a plurality of deformation holes between the terminal surface down, each the deformation hole is closed-loop type pore structure, the adhesive layer is fixed to be pasted and is located down on the terminal surface, the adhesive layer can bond in outer way slot or interior way slot bottom portion.

Preferably, the shape of the deformation aperture can be at least circular, triangular or fan-shaped.

Preferably, the two outer sealing gaskets and the two inner sealing gaskets are all in contact compression in the assembling and butting process of the duct pieces, and after the two outer sealing gaskets and the two inner sealing gaskets which are mutually compressed reach the designed compression amount, the compression sealing pressure is 1.2-1.5 times of the fortification water pressure.

Preferably, the outer sealing strip of saying with the inner sealing strip of saying is for meeting water inflation rubber sealing strip, the middle part sealing strip is polyether polyurethane sealing strip.

Preferably, the outer sealing strips and the middle sealing strips are fixedly adhered to the end faces of the segments through adhesives.

Preferably, the outer sealing strips, the middle sealing strips and the inner sealing strips which are arranged in pairs are pressed in a contact manner in the assembling and butting process of the duct pieces; the inner embedded sealant is high-modulus polyurethane sealant, and is applied after the segment assembly is finished.

Preferably, the force transfer liner is fixedly adhered to the end face of the tube piece through an adhesive.

The utility model discloses for prior art gain following technological effect:

1. the seam waterproof system formed by the multiple sealing structures improves the uniformity of contact pressure stress between the pipe pieces, so that the ratio of the sealing pressure of the sealing structures to the fortifying water pressure is reduced, and the problem of the reduction of waterproof capacity of sealing materials such as rubber caused by creep and stress relaxation is solved.

2. The whole sealing structure is symmetrically and uniformly arranged, the effective contact area between sealing materials such as rubber and the like and the duct piece is increased by more than 27%, and the contact pressure stress between the joint waterproof system and the duct piece is more uniform.

3. The self-adhesive elastic rubber sealing gasket is adopted to enhance the sealing performance and the sealing performance among the inner sealing gasket, the outer sealing gasket and the pipe piece, and the reliability of the joint waterproof system is improved by adopting a plurality of water-swelling water stop strips.

4. By improving the uniformity of the contact pressure stress, on the premise of achieving the same waterproof capability, the ratio of the designed sealing pressure to the design water pressure is changed from 2 times to 1.2-1.5 times, the problem that the waterproof capability of sealing materials such as rubber is reduced due to creep and stress relaxation is greatly improved, and the service life of a joint waterproof system under the design water pressure is prolonged.

Drawings

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

Fig. 1 is a schematic structural view of a seam waterproof system of a shield tunnel segment provided by the present invention;

FIG. 2 is a schematic cross-sectional view of the self-adhesive elastic rubber gasket shown in FIG. 1;

FIG. 3 is a schematic structural diagram of an inner elastic rubber sealing gasket and an outer water stop strip of a conventional shield tunnel segment joint waterproof system;

FIG. 4 is a schematic cross-sectional view of the elastomeric rubber gasket of FIG. 3;

FIGS. 5 a-5 b are graphs of finite element analysis of contact compressive stress for example 1 and comparative example in test one;

FIGS. 6 a-6 b are graphs of finite element analysis of contact compressive stress for example 2 and comparative example in test two;

FIGS. 7a to 7b are graphs of finite element analysis of contact compressive stress for example 3 and comparative example in test three;

FIGS. 8a to 8b are finite element analysis graphs of contact compressive stress of example 4 and comparative example in test four;

in the figure: 1-outer sealing strips; 2-outer channel sealing gasket; 3-outer channel groove; 4-middle seal strip; 5-force transfer liner; 6-inner channel sealing gasket; 7-inner channel groove; 8-inner sealing strip; 9-embedding sealant at the inner side; 10-embedding a seam groove on the inner side; 21-upper end face; 22-deformation holes; 23-a lower end face; 24-rubber gasket body; 25-an adhesive layer;

211-upper end face of existing elastic rubber sealing pad; 221-existing elastic rubber gasket deformation hole; 231-lower end face of existing elastic rubber gasket "door type".

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

The utility model aims at providing a seam waterproof system of shield tunnel section of jurisdiction to solve the problem that above-mentioned prior art exists, improve the homogeneity of the indirect contact pressure stress of section of jurisdiction through the seam waterproof system who comprises multichannel seal structure, still can reach higher waterproof ability after the ratio of the sealing pressure that realizes reducing seal structure and the pressure of seting up defences water pressure, and then reach and improve the problem that sealing materials such as rubber lead to waterproof ability to descend because of creep and stress relaxation.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.

The utility model provides a waterproof system for joints of shield tunnel segments, as shown in figure 1, comprising splicing joints, an outer sealing strip 1, an outer sealing pad 2, a middle sealing strip 4, a force transmission gasket 5, an inner sealing pad 6, an inner sealing strip 8 and an inner embedded sealant 9; the outer sealing strip 1 and the inner sealing strip 8 are preferably water-swelling rubber sealing strips, and the middle sealing strip 4 is preferably a polyether polyurethane sealing strip; the splicing seam is formed between the two spliced pipe pieces, two opposite outer channels of grooves 3 are arranged on the parts, close to the outer sides, of the end surfaces spliced by the two pipe pieces, the outer channel of sealing gasket 2 is fixedly arranged in the two outer channels of grooves 3, and the outer channel of sealing strip 1 and the middle sealing strip 4 are respectively arranged in the splicing seams on the two sides of the outer channel of sealing gasket 2; the tunnel is the inboard of section of jurisdiction.

The end face of two pipe sheets concatenation mutually is close to inboard part and has set gradually two relative interior ditch grooves 7 and two inboard caulking grooves 10 that set up relatively along the outside to inboard direction, interior sealed pad 6 is fixed to be set up in two interior ditch grooves 7, interior sealing strip 8 is fixed to be set up in the concatenation seam that interior ditch groove 7 deviates from inboard caulking groove 10 one side, inboard embedded sealed glue 9 is arranged in two inboard caulking grooves 10 in the packing, biography power liner 5 sets up in the concatenation seam between middle part sealing strip 4 and the sealed 6 of interior lane. The force transfer liner 5 is preferably adhesively secured to and sealed to the end face of one segment and is preferably pressure sealed to the other segment.

The sealing structure comprises an outer sealing strip 1, an outer sealing gasket 2, a middle sealing strip 4, an inner sealing gasket 6 and an inner sealing strip 8, wherein the outer sealing strip 1, the outer sealing gasket 2, the middle sealing strip 4, the inner sealing gasket 6 and the inner sealing strip 8 are arranged in pairs and oppositely, namely, the sealing structure comprises two outer sealing strips 1, two outer sealing gaskets 2, two middle sealing strips 4, two inner sealing gaskets 6 and two inner sealing strips 8, one outer sealing strip 1, one outer sealing strip 2, one inner sealing strip 6 and one inner sealing strip 8 are arranged on one pipe, and the other outer sealing strip 1, the other outer sealing gasket 2, the other middle sealing strip 4, the other inner sealing gasket 6 and the other inner sealing strip 8 are arranged on the other pipe, so that a symmetrical structure is formed; in a preferred embodiment, in order to facilitate splicing the segments and improve the sealing performance, the outer channel sealing strips 1 and the middle sealing strips 4 are fixedly adhered to the end surfaces of the segments by adhesives, and the outer channel sealing strips 1, the middle sealing strips 4 and the inner channel sealing strips 8 which are arranged in pairs are pressed in a contact manner in the segment splicing and butting process; the inner embedded sealant 9 is high-modulus polyurethane sealant, is arranged in the innermost second groove and is applied after the assembly of the duct piece is finished, and the adhesive can be chloroprene phenol adhesive.

The embodiment improves the uniformity of contact pressure stress between the pipe pieces through a seam waterproof system formed by a plurality of sealing structures, so that the ratio of the sealing pressure of the sealing structures to the fortifying water pressure is reduced, and the problem of the reduction of waterproof capability of sealing materials such as rubber caused by creep and stress relaxation is solved.

This embodiment improves the homogeneity of the indirect contact pressure stress of section of jurisdiction through the waterproof system of seam that constitutes by multichannel seal structure, adopts the sealed pad of self-adhesive formula elasticity rubber to strengthen the interior, the sealed pad of outer lane and the close adhesion nature and the leakproofness between the section of jurisdiction, adopts the reliability that the waterproof system of seam was improved to the water swelling sealing rod of multichannel. Based on the technical measures, the contact pressure stress, the close contact property, the sealing property and the reliability between the tubes are improved, and in order to solve the problem that the waterproof capability of sealing materials such as rubber is reduced due to creep and stress relaxation, the ratio of the designed sealing pressure to the design water pressure is changed from 2 times to 1.2-1.5 times.

In addition, as shown in fig. 2, in order to further improve the sealing type and the sealing property, in a preferred embodiment, the outer-channel gasket 2 and the inner-channel gasket 6 both use self-adhesive elastic rubber gaskets, the two outer-channel gaskets 2 are respectively self-adhered in the two outer-channel grooves 3, and the two inner-channel gaskets 6 are respectively self-adhered in the two inner-channel grooves 7, and more specifically, the self-adhesive elastic rubber gasket includes a rubber gasket body 24 and an adhesive layer 25, the rubber gasket body 24 includes an upper end surface 21, a lower end surface 23, and a plurality of deformation holes 22 opened between the upper end surface 21 and the lower end surface 23, each deformation hole 22 is of a closed-loop type hole structure, the adhesive layer 25 is fixedly attached to the lower end surface 23, and the adhesive layer 25 can be adhered to the bottoms of the outer-channel grooves 3 or the bottoms of the inner-channel grooves 7. The shape of the deformation aperture 22 includes, but is not limited to, circles, triangles, sectors, and other irregular shapes. In a preferred embodiment, the two outer sealing gaskets 2 and the two inner sealing gaskets 6 are contacted and compressed in the process of splicing and butting the pipe pieces, and after the two outer sealing gaskets 2 and the two inner sealing gaskets 6 which are compressed mutually reach the designed compression amount, the compression sealing pressure is 1.2-1.5 times of the set water pressure.

In order to verify the utility model provides a shield tunnel section of jurisdiction's seam waterproof system is superior to the waterproof construction among the prior art, utility model people have done following simulation test:

firstly, as shown in fig. 3, the typical structural form of the existing shield tunnel segment joint waterproof system is an inner elastic rubber sealing gasket and an outer water sealing gasket (comparative example), and the design sealing pressure of the existing shield tunnel segment joint waterproof system is 2 times of the water pressure for defense.

As shown in fig. 4, the elastic rubber gasket of the conventional shield-method tunnel segment joint waterproof system generally adopts a structure of "Xie Si field", and is composed of an upper end surface 211, a deformation hole 221, and a "gate-shaped" lower end surface 231, and the "gate-shaped" lower end surface 231 is tightly bonded to a segment joint groove by a neoprene adhesive.

Test No. 1

In the waterproof system of the joint of the shield tunnel segment provided by this embodiment 1, after the outer sealing gasket and the inner sealing gasket reach the designed compression amount, the compression sealing pressure is 1.2 times of the water pressure of the shield tunnel segment.

The design sealing pressure in the shield method tunnel segment joint waterproof system in the comparative example is 2 times of the design water pressure.

The contact compressive stress finite element analysis of the waterproof system of example 1 and comparative example seam is shown in fig. 5a and 5b.

Through simulation calculation and waterproof performance model test, the mechanical properties and the ultimate waterproof performance of the example 1 and the comparative example are shown in the table 1.

Table 1 comparison of mechanical properties and ultimate water repellency of example 1 with comparative examples

Serial number	Item	Example 1	Comparative example
				1	The design sealing pressure is the ratio of the design water pressure	1.2	2
2	Effective contact surface stress ratio%	84.2	66.2
				3	Contact compressive stress uniformity	The whole is relatively uniform	Stress concentration of the outer sealing strip
4	Ultimate water resistance (MPa)	2.32	2.29
				5	Ultimate water resistance (MPa) after constant pressure aging (28 d) treatment	1.86	1.32

As can be seen from fig. 5a and 5b and table 1: compared with a comparative example, the effective stress of the contact surface of the embodiment 1 is improved by 27.2 percent, the contact pressure stress is more uniform, the contact with the contact surface of the tunnel segment is more sufficient and tighter, the ultimate waterproof capacity is improved by 1.3 percent, and the ultimate waterproof capacity after constant-pressure aging (28 d) treatment is improved by 40.9 percent.

Test No. two

In the waterproof system of seam of shield tunnel section of jurisdiction that this embodiment 2 provided, after outer lane sealed pad and interior lane sealed pad reached design compression volume, its compression sealing pressure was 1.3 times of the pressure of seting up defences water.

The design sealing pressure in the shield method tunnel segment joint waterproof system in the comparative example is 2 times of the design water pressure.

The contact compressive stress finite element analysis of the waterproof system of example 2 and comparative example seam is shown in fig. 6a and 6b.

Through simulation calculation and waterproof performance model test, the mechanical properties and the ultimate waterproof performance of the example 2 and the comparative example are shown in the table 2.

Table 2 comparison of example 2 with comparative examples in terms of mechanical properties and ultimate water resistance

As can be seen from fig. 6a and 6b and table 2: compared with a comparative example, the effective stress of the contact surface of the embodiment 2 is increased by 29.6%, the contact pressure stress is more uniform, the contact with the contact surface of the tunnel tube piece is more sufficient and tighter, the ultimate waterproof capacity is improved by 3.9%, and the ultimate waterproof capacity after constant-pressure aging (28 d) treatment is improved by 42.4%.

Experiment three

In the waterproof system of seam of shield tunnel section of jurisdiction that this embodiment 3 provided, after outer lane sealed pad and interior lane sealed pad reached design compression volume, its compression sealing pressure was 1.4 times of the pressure of seting up defences water.

The design sealing pressure in the shield method tunnel segment joint waterproof system in the comparative example is 2 times of the design water pressure.

The contact compressive stress finite element analysis of the waterproof system of example 3 and comparative example seam is shown in fig. 7a and 7b.

Through simulation calculation and waterproof performance model test, the mechanical properties and the ultimate waterproof performance of the example 3 and the comparative example are shown in the table 3.

Table 3 comparison of example 3 with comparative examples in terms of mechanical properties and ultimate water repellency

Serial number	Item	Example 3	Comparative example
				1	The design sealing pressure is the ratio of the design water pressure	1.4	2
2	Effective contact surface stress ratio%	86.4	66.2
				3	Contact compressive stress uniformity	The whole is relatively uniform	Stress concentration of the outer sealing strip
4	Ultimate water resistance (MPa)	2.43	2.29
				5	Ultimate water resistance (MPa) after constant pressure aging (28 d) treatment	1.87	1.32

As can be seen from fig. 7a and 7b and table 3: compared with a comparative example, the effective stress of the contact surface of the embodiment 3 is increased by 30.5%, the contact pressure stress is more uniform, the contact with the contact surface of the tunnel segment is more sufficient and tighter, the ultimate waterproof capacity is improved by 6.1%, and the ultimate waterproof capacity after constant-pressure aging (28 d) treatment is improved by 41.7%.

Experiment four

In the seam waterproof system of shield tunnel section of jurisdiction that this embodiment 4 provided, after outer lane sealed pad and the sealed pad of interior lane reached design compression volume, its compression sealing pressure was for setting up 1.5 times of water pressure.

The design sealing pressure in the shield method tunnel segment joint waterproof system in the comparative example is 2 times of the design water pressure.

The contact compressive stress finite element analysis of example 4 and comparative example seam waterproofing system is shown in fig. 8a and 8b.

Through simulation calculation and waterproof performance model test, the mechanical properties and the ultimate waterproof performance of the example 4 and the comparative examples 1 to 4 are shown in the table 4.

Table 4 comparison of mechanical properties and ultimate water repellency of example 4 with comparative examples

Serial number	Item	Example 4	Comparative example
				1	The design sealing pressure is the ratio of the design water pressure	1.5	2
2	Effective contact surface stress ratio%	87.1	66.2
				3	Contact compressive stress uniformity	The whole is relatively uniform	The outer sealing strip has stress concentration
4	Ultimate water-proof ability (MPa)	2.52	2.29
				5	Ultimate water resistance (MPa) after constant pressure aging (28 d) treatment	1.85	1.32

As can be seen from fig. 8a and 8b and table 4: compared with a comparative example, the effective stress of the contact surface of the embodiment 4 is increased by 31.6%, the contact pressure stress is more uniform, the contact with the contact surface of the tunnel segment is more sufficient and tighter, the ultimate waterproof capacity is improved by 10%, and the ultimate waterproof capacity after constant-pressure aging (28 d) treatment is improved by 40.2%.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. The utility model provides a shield tunnel section of jurisdiction's seam waterproof system which characterized in that: the sealing gasket comprises a splicing seam, an outer channel sealing strip, an outer channel sealing gasket, a middle sealing strip, a force transmission gasket, an inner channel sealing strip and an inner side embedded sealant; the splicing seam is formed between the two spliced pipe pieces, two opposite outer channel grooves are formed in the parts, close to the outer sides, of the end surfaces of the two spliced pipe pieces, the outer channel sealing gaskets are fixedly arranged in the two outer channel grooves, and the outer channel sealing strips and the middle sealing strips are respectively arranged in the splicing seams on the two sides of the outer channel sealing gaskets;

two the terminal surface that the pipe sheet spliced mutually is close to inboard part and has set gradually two relative interior channels slot and the inboard caulking groove of two relative settings along the outside to inboard direction, the sealed pad of interior channel is fixed set up in two the interior channel inslot, the interior channel sealing strip is fixed set up in the interior channel slot dorsad leave inboard caulking groove one side in the concatenation seam, inboard embedded sealed glue is arranged in two in the inboard caulking groove, the biography power liner set up in middle part sealing strip with between the sealed pad of interior channel in the concatenation seam.

2. The waterproof system for joints of shield tunnel segments according to claim 1, wherein: the outer sealing strip, the outer sealing gasket, the middle sealing strip, the inner sealing gasket, the inner sealing strip are all arranged in pairs and oppositely.

3. The waterproof system for joints of shield tunnel segments of claim 2, wherein: the outer lane is sealed fills up with the inner lane is sealed to be self-adhesive elastic rubber packing pad, two the outer lane is sealed to fill up self-adhesive two respectively the outer lane is downthehole, two the inner lane is sealed to fill up self-adhesive two respectively in the inner lane slot.

4. The waterproof system for joints of shield tunnel segments of claim 3, wherein: the self-adhesive elastic rubber sealing gasket comprises a rubber sealing gasket body and an adhesive layer, wherein the rubber sealing gasket body comprises an upper end face, a lower end face and a plurality of deformation holes formed between the upper end face and the lower end face, each deformation hole is of a closed-loop hole structure, the adhesive layer is fixedly attached to the lower end face and can be adhered to the outer channel groove or the bottom of the inner channel groove.

5. The shield tunnel segment joint waterproof system of claim 4, wherein: the shape of the deformation hole can be at least circular, triangular or fan-shaped.

6. The waterproof system for joints of shield tunnel segments of claim 3, wherein: the two outer sealing gaskets and the two inner sealing gaskets are in contact compression in the assembling and butting process of the duct pieces, and after the two outer sealing gaskets and the two inner sealing gaskets which are compressed mutually reach the designed compression amount, the compression sealing pressure is 1.2-1.5 times of the design water pressure.

7. The waterproof system for joints of shield tunnel segments according to claim 1, wherein: the outer sealing strip with the inner sealing strip is the water-swelling rubber sealing strip, the middle sealing strip is the polyether polyurethane sealing strip.

8. The waterproof system for joints of shield tunnel segments according to claim 1, wherein: the outer sealing strips and the middle sealing strips are fixedly adhered to the end faces of the pipe pieces through adhesives.

9. The waterproof system for joints of shield tunnel segments of claim 2, wherein: the outer channel sealing strips, the middle sealing strips and the inner channel sealing strips which are arranged in pairs are pressed in a contact manner in the assembling and butting process of the duct pieces; the inner embedded sealant is high-modulus polyurethane sealant, and is applied after the segment assembly is completed.

10. The waterproof system for joints of shield tunnel segments of claim 1, wherein: the force transfer liner is fixedly adhered to the end face of the duct piece through an adhesive.

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