Viscous sealing elastic waterproof ring for hydraulic tunnel shield segment joint and construction method

Abstract

The invention relates to a viscous sealing elastic waterproof ring for a hydraulic tunnel shield segment joint and a construction method, the elastic waterproof ring is of a hollow annular circular pipe structure, is arranged in an elliptical extrusion sealing platform reserved on the end face of the shield segment annular joint, and comprises a steel elastic compressible waterproof pipe and a water swelling rubber pipe outside the steel elastic compressible waterproof pipe; the radial section of the elastic waterproof ring is in a circular ring shape, the elastic waterproof ring is in an oval ring shape after being longitudinally extruded in the oval extrusion sealing platform, and the annular seam is blocked. By means of the elastic restoring force characteristic of the steel elastic compressible waterproof pipe, the elastic waterproof ring continuously applies pressure from inside to outside, the gap of the shield segment annular seam is completely filled, the water stopping effect of the shield segment annular seam is improved, and after the water swelling rubber pipe is used for a long time and aged, the sealing performance can still be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic tunnel construction, and in particular to a viscous sealing elastic waterproof ring for a hydraulic tunnel shield segment joint and a construction method. Background Art

[0002] Hydraulic tunnels are structures dug in mountains or underground, mainly used for irrigation, power generation, water supply, water discharge, water transfer, construction diversion and navigation. They have the advantages of short distance, less environmental damage and low interference, and have been widely used in water conservancy project construction. In recent years, the focus of hydraulic tunnel construction has gradually shifted to areas with complex geological conditions, showing complex structures, changeable environments, high water pressure and frequent disasters.

[0003] Shield tunneling has unique advantages over other tunneling methods due to its high degree of mechanization, fast and safe tunneling, and less impact of construction disturbance. It is widely used in tunnel engineering construction. However, different engineering geological conditions have different requirements for shield construction. Complex rock and soil media, water-rich strata, pressure head and many other adverse external interferences will cause many tunnel diseases. Among them, the most common is the water leakage problem at the joints of shield segments, which is difficult to cure. With the increase of service life, tunnel leakage will cause a series of diseases such as crack development, accelerated erosion, uneven settlement, fatigue damage, etc., which seriously affect the durability and normal use of the tunnel. The joints of shield segments weaken the longitudinal and transverse stiffness and strength of the overall structure of the tunnel and the local segment structure. It is the weak link in the waterproof sealing of the tunnel. Structural damage, deformation and water leakage are all concentrated on the joints of shield segments.

[0004] At present, the main waterproofing method for shield segment joints is to use elastic sealing pads made of porous EPDM (ethylene propylene diene monomer). The elastic sealing pads are compressed during the splicing process of the shield segments to deform them, thereby filling the uneven gaps in the joints. At the same time, due to the action of external forces, the elastic sealing pads will produce a large elastic reaction force, which can keep the gaps in a lasting density, and finally achieve the effect of blocking the leakage of the joints. However, in actual use, it is found that such sealing pads will age after long-term use, and the elasticity after compression cannot meet the requirements, resulting in the decrease of the waterproof performance of the joints as the compression reaction force decreases, and finally the failure of the joint waterproofing system. At the same time, the shield segments will also have joints opening and misalignment during assembly and use. This phenomenon will cause the connected sealing pads to be subjected to the longitudinal compression force and the lateral friction force at the same time, making the sealing pads prone to stretching deformation or even falling off.

[0005] Therefore, it is necessary to propose new devices and measures to overcome the above-mentioned defects. Summary of the invention

[0006] The purpose of the present invention is to provide a viscous sealing elastic waterproof ring for the joints of hydraulic tunnel shield segments and a construction method to solve the problems of the current sealing gasket failing to meet the elastic requirements after long-term use and aging, and being prone to stretching deformation or even falling off.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint is a hollow annular circular tube structure, which is arranged in an elliptical extrusion sealing platform reserved on the end face of the shield segment annular seam, and includes a steel elastic compressible waterproof pipe and an external water-expandable rubber pipe;

[0009] The radial section of the elastic waterproof ring is in the shape of a circular ring, and after being longitudinally extruded in the elliptical extrusion sealing platform, it becomes an elliptical ring and seals the annular seam.

[0010] Furthermore, the elliptical extrusion sealing platform is an arc groove arranged on the end surface of the annular seam of the shield segment;

[0011] After the plurality of shield segments are circumferentially spliced, the plurality of arc surface grooves are circumferentially connected to form an annular groove;

[0012] After the two rings of shield segments are longitudinally spliced, the two annular grooves are butt-jointed to form an annular cavity, and the radial section of the annular cavity is elliptical; the circumference of the radial section of the annular cavity is the same as the circumference of the radial section of the elastic waterproof ring.

[0013] Furthermore, the outer wall of the water-swellable rubber tube is provided with a pressure-sensitive reactive strong self-adhesive glue.

[0014] Furthermore, the surface of the pressure-sensitive reactive strong self-adhesive is provided with silicone oil paper.

[0015] Furthermore, the outer wall of the water-swellable rubber tube is evenly arranged with concave rubber locking holes.

[0016] Furthermore, the water-swellable rubber tube is made of a porous water-swellable rubber material made by blending EPDM rubber with a hydrophilic super absorbent material.

[0017] On the other hand, a construction method of the viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint as described above is provided, the method comprising:

[0018] Prefabricating the elastic waterproof ring;

[0019] After the shield segments of the first ring are circumferentially spliced ​​into a ring, one side of the elastic waterproof ring is bonded into the circumferential groove of the circumferential seam end face of the shield segments of the first ring, and the other side of the elastic waterproof ring is exposed;

[0020] Continue to splice the shield segments of the second ring, and after the shield segments of the second ring are spliced ​​into a ring, butt the shield segments of the first ring, and bond the other side of the elastic waterproof ring to the annular groove of the annular seam end face of the shield segments of the second ring;

[0021] The annular grooves on both sides of the longitudinal direction are close to each other to form the annular cavity, which squeezes the elastic waterproof ring to make it deform longitudinally, and the radial section of the elastic waterproof ring changes from a circular ring to an elliptical ring.

[0022] Furthermore, the elastic waterproof ring is prefabricated, comprising:

[0023] The water-swellable rubber tube is made of a porous water-swellable rubber material;

[0024] The steel elastic compressible waterproof pipe is made of a thin-walled steel pipe;

[0025] The water-expandable rubber tube is placed outside the steel elastic compressible waterproof tube and then bent to form a hollow annular circular tube.

[0026] Furthermore, the prefabrication of the elastic waterproof ring also includes:

[0027] Prefabricating a rubber locking hole on the outer wall of the water-swellable rubber tube;

[0028] After the hollow annular circular tube is formed, the pressure-sensitive reaction type strong self-adhesive glue is coated on the outer wall of the water-swellable rubber tube, and the glue locking hole is filled.

[0029] Furthermore, the prefabrication of the elastic waterproof ring also includes:

[0030] The silicone oil paper is covered on the surface of the pressure-sensitive reactive strong self-adhesive adhesive, and the silicone oil paper is uncovered during construction.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a viscous sealing elastic waterproof ring and construction method for the joints of hydraulic tunnel shield segments. With the elastic recovery force characteristics of the steel elastic compressible waterproof pipe, the elastic waterproof ring is continuously pressed from the inside to the outside to completely fill the gap of the shield segment annular seam, thereby improving the water-stopping effect of the shield segment annular seam. The water-expandable rubber tube can still ensure the sealing performance after long-term use and aging. At the same time, through the pressure-sensitive reactive strong self-adhesive glue arranged on the outside of the water-expandable rubber tube, the elliptical rigid extrusion sealing platform and the elastic waterproof ring are tightly fitted after the elastic waterproof ring is compressed, and it is not easy to fall off, thereby ensuring the sealing of the shield segment annular seam while improving the structural toughness of the shield segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a cross-sectional structural diagram of the elastic waterproof ring provided by the present invention.

[0035] Figure 2 It is a radial cross-sectional structural diagram of the elastic waterproof ring provided by the present invention.

[0036] Figure 3 It is a radial cross-sectional structural diagram of the elastic waterproof ring provided by the present invention before being compressed in an elliptical extrusion sealing platform.

[0037] Figure 4 It is a radial cross-sectional structural diagram of the elastic waterproof ring provided by the present invention after being compressed in an elliptical extrusion sealing platform.

[0038] Figure 5 It is a schematic diagram of the microscopic porous structure of the water-expandable rubber tube.

[0039] The symbols in the figure are:

[0040] 1-Elliptical extrusion sealing platform, 2-shield segment, 3-water-swellable rubber tube, 4-steel elastic compressible waterproof tube, 5-pressure-sensitive reactive strong self-adhesive glue, 6-elastic waterproof ring, 7-silicone oil paper, 8-glue locking hole. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" and the like should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.

[0045] In a specific implementation, the length direction of the hydraulic tunnel is defined as the longitudinal direction, the direction perpendicular thereto is defined as the transverse direction, the segment lining profile of the hydraulic tunnel is defined as the circumferential direction, and the direction radiating outward from the inner center of the hydraulic tunnel is defined as the radial direction.

[0046] The invention provides a viscous sealing elastic waterproof ring for the joints of hydraulic tunnel shield segments, which is suitable for the assembly construction of shield segments of long and deep-buried hydraulic tunnels and plays an important sealing and waterproofing role for the annular joints of the shield segments.

[0047] Specifically, Figure 1 and Figure 2 The elastic waterproof ring 6 is a hollow annular circular tube structure, with a circular cross section and a circular radial section, and is an elastic and deformable hollow annular body. The elastic waterproof ring 6 includes a steel elastic compressible waterproof tube 4 and a water-expandable rubber tube 3 outside thereof, the outer wall of the water-expandable rubber tube 3 is provided with a pressure-sensitive reactive strong self-adhesive 5, and the surface of the pressure-sensitive reactive strong self-adhesive 5 is provided with silicone oil paper 7.

[0048] in:

[0049] The steel elastic compressible waterproof pipe 4 is made of thin-walled steel pipe. Due to the small thickness of the pipe wall, it can be bent and made into a ring. At the same time, the thin-walled steel pipe can be radially extruded and deformed, and the cross section changes from a circle to an ellipse. After being extruded, the steel elastic compressible waterproof pipe 4 still has a continuous outward resistance restoring force, giving the elastic waterproof ring 6 elasticity. The steel elastic compressible waterproof pipe 4 can be made of 304 grade austenitic stainless steel. This material has excellent elastic and mechanical properties due to its high elastic modulus and yield strength. The thin-walled stainless steel pipe can better restore its original shape after being compressed. Under some common conditions, it shows a characteristic close to complete rebound. In addition, in order to enhance the elastic recovery force characteristics of the steel pipe, the steel pipe is specially set to a small diameter and thin wall thickness to increase its elastic recovery force by utilizing the characteristics of the small thickness of the annular gap of the shield pipe segment. At the same time, because the present invention utilizes the rebound characteristics of the radial compression of the steel pipe, and the steel pipe in this direction has a greater rebound force, the elastic recovery force of the steel elastic compressible waterproof pipe is ensured by considering multiple factors.

[0050] The water-swellable rubber tube 3 can expand rapidly after absorbing water, increase in volume, generate greater friction and sealing effect, and give the elastic waterproof ring 6 sealing properties. Specifically, the water-swellable rubber material used in the water-swellable rubber tube 3 is a porous material made by blending EPDM rubber with a hydrophilic super absorbent material (such as cross-linked sodium polyacrylate, etc.).

[0051] The pressure-sensitive reactive strong self-adhesive 5 uses an acrylic pressure-sensitive adhesive to give the elastic waterproof ring 6 stickiness. "Pressure-sensitive" means that it can be immediately adhered to the surface of an object under the application of slight pressure without the need for additional processing characteristics such as heating, solvents or catalysts. The "pressure-sensitive" characteristic can be used to quickly bond the elastic waterproof ring 6 to the groove to achieve a waterproof effect, improve waterproof efficiency, and shorten the construction time.

[0052] The silicone oil paper 7 covers the pressure-sensitive reactive strong self-adhesive adhesive 5 to provide protection, preventing the water-swellable rubber from prematurely expanding and failing in the humid tunnel construction environment. At the same time, it is convenient for transportation and handling. During construction, the silicone oil paper 7 is uncovered to expose the pressure-sensitive reactive strong self-adhesive adhesive 5, and the elastic waterproof ring 6 can be directly fixed and installed by bonding.

[0053] In order to install the elastic waterproof ring 6, an elliptical extrusion sealing platform 1 is provided on the end face of the annular seam of the shield segment 2. The elliptical extrusion sealing platform 1 is an arc groove provided on the end face of the annular seam of the shield segment 2. After multiple shield segments 2 are circumferentially spliced, multiple arc grooves are circumferentially connected to form an annular groove. After two rings of shield segments 2 are longitudinally spliced, the two annular grooves are butt-jointed to form an annular cavity, and the radial section of the annular cavity is elliptical. The elastic waterproof ring 6 is located in the elliptical extrusion sealing platform 1 reserved on the end face of the annular seam of the shield segment 2, as shown in FIG. Figure 3The radial section of the elastic waterproof ring 6 is annular. In the elliptical extrusion sealing platform 1, the radial height of the elastic waterproof ring 6 is less than the thickness of the shield segment 2 and is centrally arranged. After being longitudinally extruded between the two shield segments 2, the elastic waterproof ring 6 is confined in the annular cavity. Figure 4 The radial section of the elastic waterproof ring 6 is changed into an elliptical ring. Since the circumference of the elliptical radial section of the annular cavity is the same as the outer circumference of the circular ring of the radial section of the elastic waterproof ring 6, or slightly longer than the outer circumference of the circular ring of the radial section of the elastic waterproof ring 6, the elastic waterproof ring 6 fills the entire annular cavity and blocks the annular seam.

[0054] In some embodiments, the outer wall of the water-swellable rubber tube 3 may be evenly provided with concave glue locking holes 8. After coating the pressure-sensitive reactive strong self-adhesive glue 5, the pressure-sensitive reactive strong self-adhesive glue 5 may fill the glue locking holes 8 to increase the bonding strength.

[0055] The above elastic waterproof ring 6 has the following technical advantages:

[0056] 1. The structure of the present invention is designed according to the characteristics of the circumferential seam jacking and extrusion installation of shield segments. It can form dense gaps at the joints of shield segments by taking advantage of the characteristics of the circumferential seam jacking and pressure application, thereby achieving a very good waterproof effect.

[0057] 2. The elastic restoring force of the steel elastic compressible waterproof tube 4 can ensure that the elastic waterproof ring 6 continuously applies pressure outward from the inside, ensuring that it completely fills the gap between the tube segments and improves the waterproof effect of the tube segment joint. In addition, when the water-expandable rubber tube 3 ages due to long-term use and cannot meet the elasticity requirements, it can continue to provide elastic restoring force to extend and ensure the waterproof effect.

[0058] 3. By utilizing the self-expanding property of the water-expandable rubber tube 3, it is ensured that the elastic waterproof ring 6 can completely fill the irregular local gaps of the pipe segment in the working state, increase the density of the gap, and improve the waterproof performance of the joint.

[0059] 4. The pressure-sensitive strong self-adhesive adhesive 5 is arranged on the outside of the water-expandable rubber tube 3 to ensure that the elliptical rigid extrusion sealing platform 1 and the elastic waterproof ring 6 are tightly fitted after the steel elastic compressible waterproof tube 4 is compressed, thereby ensuring the sealing of the joint and improving the toughness of the pipe segment structure. When the joint of the pipe segment structure is misaligned, the joint can still be effectively sealed.

[0060] 5. The silicone oil paper 7 provided on the surface of the water-swellable rubber tube 3 ensures that the water-swellable rubber tube 3 will not become ineffective due to the humid environment of the tunnel or premature contact with other objects before installation and use.

[0061] During the construction of shield segments for hydraulic tunnels, the shield segments 2 are assembled in a ring from bottom to top and from outside to inside the tunnel. When a ring of segments is firmly fixed to the wall, the support legs of the shield machine support the innermost ring segment, and the cutter head at the front end of the shield machine rotates to break the rock and push it into the tunnel to form a new tunnel working surface. The shield machine legs are lowered to start assembling the next ring of segments again.

[0062] Based on the above shield construction, the construction method of the viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint of the present invention specifically includes the following steps:

[0063] S1: Prefabricated elastic waterproof ring 6. Specifically including:

[0064] S101: a water-swellable rubber tube 3 is made of a porous water-swellable rubber material, and the outer wall of the water-swellable rubber tube 3 is prefabricated with rubber locking holes 8 which are evenly arranged.

[0065] S102: Use thin-walled steel pipe to make a steel elastic compressible waterproof pipe 4.

[0066] S103: The water-expandable rubber tube 3 is placed outside the steel elastic compressible waterproof tube 4, and then bent to form a hollow ring-shaped circular tube.

[0067] Specifically, it is possible to consider first making the water-swellable rubber tube 3 into a long strip, the short side of which is slightly smaller than the circumference of the outer ring of the steel elastic compressible waterproof tube 4. During assembly, the bonding starts from the side of the steel elastic compressible waterproof tube 4 close to the center of the circle, and a slight pulling force is applied to make it fit tightly to the outside of the steel elastic compressible waterproof tube 4.

[0068] S104: coating the outer wall of the water-swellable rubber tube 3 with a pressure-sensitive reactive strong self-adhesive glue 5 and filling the glue locking hole 8.

[0069] S105: Cover the surface of the pressure-sensitive reactive strong self-adhesive 5 with silicone oil paper 7. The silicone oil paper 7 can be peeled off during construction.

[0070] S2: After the first ring of shield segments 2 are circumferentially spliced ​​into a ring, peel off the silicone oil paper 7 on any half of the elastic waterproof ring 6, and bond one side of the elastic waterproof ring 6 to the center position of the circumferential groove on the end face of the circumferential seam of the first ring of shield segments 2. The silicone oil paper on the other side of the elastic waterproof ring 6 is not peeled off for the time being to ensure that the water-swellable rubber will not fail prematurely due to the humid construction environment of the tunnel.

[0071] S3: After the elastic waterproof ring 6 is bonded, continue to splice the second ring shield segment 2. After the circumferential splicing into a ring, dock the second ring shield segment 2 with the first ring shield segment 2, peel off the silicone oil paper 7 on the other side of the elastic waterproof ring 6 that has not been torn, and bond the other side of the elastic waterproof ring 6 to the annular groove on the end face of the annular seam of the second ring shield segment 2.

[0072] S4: With the help of the force of the shield machine to push the rear segment forward for installation, the annular grooves on both sides of the longitudinal direction approach each other, completely contact and close to form an annular cavity, squeezing the elastic waterproof ring 6 to cause it to deform longitudinally, and the radial section of the elastic waterproof ring 6 changes from a circular ring to an elliptical ring.

[0073] At the same time, during the extrusion process, the water-swellable rubber tube 3 will be squeezed under the combined action of the jacking force of the rear side pipe segment and the restoring force of the steel elastic compressible waterproof tube 4. During this process, the water-swellable rubber tube 3 will completely fill the irregular local gaps between the pipe segments, and under the influence of the humid environment in the tunnel and the underground water seepage behind the pipe segments, the water-swellable rubber tube 3 will automatically open to increase the filling effect of the gaps.

[0074] Finally, the elastic waterproof ring 6 and the elliptical extrusion sealing platform 1 are firmly bonded together by the pressure-sensitive reactive strong self-adhesive glue 5, completely sealing the annular seam of the pipe segment to form a sealed annular waterproof structure.

[0075] During the construction process, the interface of the elastic waterproof ring 6 is staggered with the longitudinal seam of the shield segment 2 to avoid the seam being connected.

[0076] Due to the special structural design of the present invention, the present invention can be directly installed and fixed by bonding during construction, which is convenient for construction and highly efficient, and has positive promotion significance.

[0077] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. The viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint is characterized by: The elastic waterproof ring (6) is a hollow annular circular tube structure, which is arranged in an elliptical extrusion sealing platform (1) reserved on the annular seam end surface of the shield segment (2), and comprises a steel elastic compressible waterproof tube (4) and an external water-expandable rubber tube (3); The radial cross section of the elastic waterproof ring (6) is in the shape of a circular ring, and after being longitudinally extruded in the elliptical extrusion sealing platform (1), it becomes an elliptical ring and seals the annular seam.

2. The adhesive sealing elastic waterproof ring for the joint of the shield segment of a hydraulic tunnel according to claim 1 is characterized in that: The elliptical extrusion sealing platform (1) is a curved groove arranged on the end surface of the annular seam of the shield segment (2); After a plurality of shield segments (2) are circumferentially spliced, a plurality of arc surface grooves are circumferentially connected to form an annular groove; After the two rings of shield segments (2) are longitudinally spliced, the two annular grooves are butted together to form an annular cavity, and the radial section of the annular cavity is elliptical; the circumference of the radial section of the annular cavity is the same as the circumference of the radial section of the elastic waterproof ring (6).

3. The adhesive sealing elastic waterproof ring for the joint of the shield segment of a hydraulic tunnel according to claim 2 is characterized in that: The outer wall of the water-swellable rubber tube (3) is provided with a pressure-sensitive reaction type strong self-adhesive glue (5).

4. The adhesive sealing elastic waterproof ring for the joint of the shield segment of a hydraulic tunnel according to claim 3 is characterized by: The surface of the pressure-sensitive reactive strong self-adhesive (5) is provided with silicone oil paper (7).

5. The adhesive sealing elastic waterproof ring for the joints of hydraulic tunnel shield segments according to claim 4 is characterized in that: The outer wall of the water-swellable rubber tube (3) is evenly arranged with concave rubber locking holes (8).

6. The adhesive sealing elastic waterproof ring for the joints of hydraulic tunnel shield segments according to claim 5 is characterized in that: The water-swellable rubber tube (3) is made of a porous water-swellable rubber material made by blending EPDM rubber and a hydrophilic super absorbent material.

7. The construction method of the adhesive sealing elastic waterproof ring of the hydraulic tunnel shield segment joint according to claim 6, characterized in that: The method comprises: Prefabricating the elastic waterproof ring (6); After the shield segments (2) of the first ring are circumferentially spliced ​​into a ring, one side of the elastic waterproof ring (6) is bonded into the circumferential groove of the circumferential seam end face of the shield segments (2) of the first ring, and the other side of the elastic waterproof ring (6) is exposed; Continue to splice the shield segments (2) of the second ring. After the shield segments (2) are spliced ​​into a ring in an annular direction, the shield segments (2) of the second ring are butt-jointed with the shield segments (2) of the first ring, and the other side of the elastic waterproof ring (6) is bonded into the annular groove of the annular seam end face of the shield segments (2) of the second ring; The annular grooves on both sides of the longitudinal direction are close to each other to form the annular cavity, which squeezes the elastic waterproof ring (6) to cause it to deform longitudinally, and the radial cross-section of the elastic waterproof ring (6) changes from a circular ring to an elliptical ring.

8. The construction method of the viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint according to claim 7 is characterized by: The elastic waterproof ring (6) is prefabricated, comprising: The water-swellable rubber tube (3) is made of a porous water-swellable rubber material; The steel elastic compressible waterproof pipe (4) is manufactured by using a thin-walled steel pipe; The water-expandable rubber tube (3) is placed outside the steel elastic compressible waterproof tube (4), and then bent to form a hollow annular circular tube.

9. The construction method of the viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint according to claim 8 is characterized in that: The prefabricated elastic waterproof ring (6) further comprises: A rubber locking hole (8) is prefabricated on the outer wall of the water-swellable rubber tube (3); After the hollow annular circular tube is formed, the pressure-sensitive reaction type strong self-adhesive glue (5) is coated on the outer wall of the water-swellable rubber tube (3), and the glue locking hole (8) is filled.

10. The construction method of the viscous sealing elastic waterproof ring of the hydraulic tunnel shield segment joint according to claim 9, characterized in that: The prefabricated elastic waterproof ring (6) further comprises: The silicone oil paper (7) is covered on the surface of the pressure-sensitive reactive strong self-adhesive (5), and the silicone oil paper (7) is uncovered during construction.

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