Flexible joint for immersed tunnel

Abstract

The invention discloses an immersed tunnel flexible joint in the field of civil engineering, which comprises a plurality of tunnel pipe sections which are transversely arranged, and a water stop assembly and a longitudinal limiting assembly are arranged between the adjacent tunnel pipe sections; a detection assembly is in transverse sliding fit with the adjacent tunnel pipe sections; the water stopping assembly is used for absorbing deformation energy generated by relative displacement between the tunnel pipe sections. The longitudinal limiting assembly is used for keeping the compression amount of the water stop assembly. The detection assembly is used for detecting the sealing performance and the compression state of the water stop assembly. The water stop assembly comprises a GINA water stop belt, and the two sides of the GINA water stop belt are fixedly connected to the side walls of the adjacent tunnel pipe sections correspondingly. And an OMEGA water stop belt is arranged below the GINA water stop belt. The sealing performance and the compression state of the GINA water stop belt are detected through the detection assembly; in addition, the detection assembly can also ensure the flatness and stress uniformity of the joint of the two tunnel pipe sections and bear part of axial tension and pressure of the tunnel, and the situation that the stress is excessively concentrated on the GINA water stop belt, and consequently the GINA water stop belt deforms excessively is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, in particular to a flexible joint for an immersed tube tunnel. Background Art

[0002] The pipe joints of immersed tube tunnels are a critical part of immersed tube projects. They should meet the following functions and requirements: first, watertightness, requiring no seepage or leakage during the construction and operation of the immersed tube tunnels; second, the joints should be able to withstand various loads and forced deformations, such as earthquakes, temperature, and foundation deformation; and third, the joint structure must meet requirements such as clear force bearing, convenient construction, and guaranteed construction quality.

[0003] For example, Chinese patent publication CN 103741717 B discloses a flexible joint for immersed tube tunnels. The joint is divided into two parts: an above-water joint and an underwater joint. The above-water joint secures the ends of the GINA waterstop between the rigid steel ring and the tunnel casing, and installs Ω-shaped rubber waterstops on both the inside and outside. The underwater joint secures the GINA waterstop to one end of the rigid steel ring, while the other end is secured by hydraulic pressure, and an Ω-shaped rubber waterstop is installed inside the casing. This invention features clear force distribution and facilitates construction of the underwater joint. The joint is also more flexible, ensuring watertightness and earthquake resistance even under significant deformation.

[0004] However, after installation, it is not convenient to detect the sealing and compression status of the above-mentioned GINA waterstop, and the deformation capacity of the GINA waterstop is limited. When the GINA waterstop is subjected to a large external force, it is easy to cause the GINA waterstop to deform too much, thereby causing seawater to leak into the tunnel; therefore, it is necessary to propose a flexible joint for immersed tube tunnels. Summary of the Invention

[0005] The purpose of the present invention is to propose a flexible joint for an immersed tube tunnel, which can detect the sealing and compression status of the GINA waterstop through a detection component; the detection component can also ensure the flatness and uniform force at the connection between the two tunnel sections, bear part of the axial tensile pressure of the tunnel, and avoid excessive stress concentration on the GINA waterstop, resulting in excessive deformation of the GINA waterstop.

[0006] To achieve the above-mentioned object, the technical solution of the present invention is as follows: a flexible joint for an immersed tunnel, comprising a plurality of transversely arranged tunnel sections, with water-stop assemblies and longitudinal limit assemblies provided between adjacent tunnel sections; and detection assemblies provided on adjacent tunnel sections for transverse sliding engagement;

[0007] The water-stop assembly is used to absorb the deformation energy generated by the relative displacement between tunnel sections;

[0008] The longitudinal limit assembly is used to maintain the compression of the water stop assembly;

[0009] The detection component is used to detect the sealing and compression status of the water-stop component.

[0010] As a further improvement of the technical solution of the invention, the waterstop assembly includes a GINA waterstop, and both sides of the GINA waterstop are respectively fixedly connected to the side walls of the adjacent tunnel pipe section; an OMEGA waterstop is provided below the GINA waterstop, and both ends of the OMEGA waterstop are respectively fixedly connected to the bottom of the adjacent tunnel pipe section.

[0011] As a further improvement to the technical solution of the invention, the longitudinal limiting assembly includes a cable sleeve pre-buried in the tunnel pipe section, a cable body is fixedly connected in the cable sleeve, and connecting sleeves are detachably connected to adjacent cable bodies by threads.

[0012] As a further improvement to the technical solution of the invention, the detection assembly includes a first baffle and a second baffle, which are respectively located on adjacent tunnel sections and both slide laterally with the adjacent tunnel sections; the first baffle and the second baffle are used to close the upper area of ​​the GINA waterstop; an electromagnet and an iron block are respectively installed on the side where the first baffle and the second baffle are close to each other; a pressure sensor is installed on the upper part of the inner wall of the first baffle.

[0013] As a further improvement to the technical solution of the invention, it also includes a controller. A laser rangefinder for detecting the movement stroke of the second baffle is installed on the side wall of the tunnel section. The laser rangefinder is electrically connected to the controller. The laser rangefinder is located on the side of the second baffle away from the iron block.

[0014] As a further improvement to the technical solution of the invention, the surfaces of the electromagnet and the iron block are coated with an anti-corrosion layer.

[0015] As a further improvement to the technical solution of the invention, the construction method of the longitudinal limit assembly is: pull out the cable body in the cable sleeve; preliminarily thread the cable bodies at both ends to the two ends of the connecting sleeve; straighten the cable bodies on both sides through the tensioning jack; after straightening, tighten the cable bodies on both sides to the two ends of the connecting sleeve; and remove the tensioning jack.

[0016] As a further improvement to the technical solution of the invention, an anti-rust layer is applied on the cable body.

[0017] The above solution achieves the following principles and beneficial effects:

[0018] (1) The detection component in the present invention can perform a sealing test on the area above the GINA waterstop. By measuring the pressure value of the area above the GINA waterstop, when the pressure value is maintained at a fixed value, it indicates that the area above the GINA waterstop has good sealing. The detection component can also ensure the flatness and uniform force at the connection between the two tunnel sections, bear part of the axial tensile pressure of the tunnel, and avoid excessive stress concentration on the GINA waterstop.

[0019] (2) The detection component in the present invention can detect the compression state of the GINA waterstop; since the GINA waterstop needs to be compressed to different degrees under different working conditions, the gap between the two tunnel sections is different; the present invention analyzes the gap between the two tunnel sections by measuring the initial position and the position after movement of the second baffle, thereby obtaining the compression degree of the GINA waterstop; based on the compression degree, the staff can judge the compression deformation characteristics of the GINA waterstop and whether the GINA waterstop can withstand the external pressure of the tunnel, so that the staff can make timely adjustments.

[0020] (3) The anti-corrosion layer in the present invention can play an anti-corrosion role on the surface of the electromagnet and the iron block, and to a certain extent improve the service life of the electromagnet and the iron block; the anti-rust layer in the present invention can play an anti-rust treatment on the surface of the cable body, and to a certain extent improve the service life of the cable body.

[0021] (4) The present invention pulls out the cable body in the cable sleeve; preliminarily connects the cable bodies at both ends to the two ends of the connecting sleeve respectively by threading; straightens the cable bodies on both sides by tensioning jacks; after straightening, tightens the cable bodies on both sides to the two ends of the connecting sleeve respectively; removes the tensioning jacks; and is used to ensure the compression amount of the GINA waterstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a partial cross-sectional view of an embodiment of the present invention.

[0024] The reference numerals in the drawings of the specification include: 1-tunnel pipe section; 2-GINA waterstop; 3-OMEGA waterstop; 401-cable sleeve; 402-connecting sleeve; 403-cable body; 501-first baffle; 502-second baffle; 6-laser rangefinder; 701-electromagnet; 702-iron block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two elements, or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined with each other, but only on the basis that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this disclosure.

[0029] The following is combined with Figure 1 The present invention is described in further detail.

[0030] Example 1

[0031] The embodiment is basically as shown in the attached Figure 1 As shown:

[0032] A flexible joint for an immersed tube tunnel comprises a plurality of transversely arranged tunnel sections 1, with water-stopping assemblies and longitudinal limit assemblies provided between adjacent tunnel sections 1; detection assemblies are provided on adjacent tunnel sections 1 for transverse sliding engagement; the water-stopping assemblies are used to absorb deformation energy generated by relative displacement between the tunnel sections 1; the longitudinal limit assemblies are used to maintain the compression of the water-stopping assemblies; and the detection assemblies are used to detect the sealing and compression state of the water-stopping assemblies.

[0033] The waterstop assembly includes a GINA waterstop 2, and both sides of the GINA waterstop 2 are fixedly connected to the side walls of the adjacent tunnel section 1 by bolts; an OMEGA waterstop 3 is provided below the GINA waterstop 2, and both ends of the OMEGA waterstop 3 are fixedly connected to the bottom of the adjacent tunnel section 1 by bolts.

[0034] The longitudinal limiting assembly includes a cable sleeve 401 pre-buried in the tunnel pipe section 1 , a cable body 403 is integrally formed in the cable sleeve 401 , and connecting sleeves 402 are detachably connected to adjacent cable bodies 403 by threads.

[0035] The detection component includes a first baffle 501 and a second baffle 502, which are respectively located on adjacent tunnel sections 1 and both slide laterally with the adjacent tunnel sections 1; the first baffle 501 and the second baffle 502 are used to close the upper area of ​​the GINA waterstop 2; an electromagnet 701 and an iron block 702 are respectively installed on the side where the first baffle 501 and the second baffle 502 are close to each other; a pressure sensor is installed on the upper part of the inner wall of the first baffle 501.

[0036] The construction method of the longitudinal limit assembly is: pull out the cable body 403 in the cable sleeve 401; preliminarily thread the cable bodies 403 at both ends to the two ends of the connecting sleeve 402; straighten the cable bodies 403 on both sides through the tensioning jack; after straightening, tighten the cable bodies 403 on both sides to the two ends of the connecting sleeve 402; and remove the tensioning jack.

[0037] The specific implementation process is as follows:

[0038] Installation of the GINA waterstop 2: prefabricate the first baffle 501 and the second baffle 502 in the offshore dock; after prefabrication, fix both sides of the GINA waterstop 2 on the side walls of the two tunnel sections 1 with bolts.

[0039] Pre-stress the GINA waterstop 2: the tunnel pipe section 1 is floated in the dry dock, undocking, floating, and sunk. After sinking into position accurately, the pulling and closing jack is hoisted or installed to pre-stress the GINA waterstop 2 and pull it to the waterstop condition; the two ends of the OMEGA waterstop 3 are fixed to the bottom of the two tunnel pipe sections 1 by bolts.

[0040] Connect the longitudinal limit assembly to ensure the compression amount of the GINA waterstop 2: Connect the longitudinal limit assembly according to actual usage, specifically: pull out the cable body 403 in the cable sleeve 401; preliminarily thread the cable bodies 403 at both ends to the two ends of the connecting sleeve 402; straighten the cable bodies 403 on both sides through the tensioning jack; after straightening, tighten the cable bodies 403 on both sides to the two ends of the connecting sleeve 402; remove the tensioning jack.

[0041] Sealing test: Since an OMEGA waterstop 3 is provided below the GINA waterstop 2, the OMEGA waterstop 3 can seal the bottom of the GINA waterstop 2, so the sealing test of the area above the GINA waterstop 2 is required, specifically: the first baffle 501 and the second baffle 502 are respectively installed on the adjacent tunnel sections 1, and the first baffle 501 and the second baffle 502 are pushed close to each other. The electromagnet 701 adsorbs the iron block 702 so that the first baffle 501 and the second baffle 502 seal the area above the GINA waterstop 2. The pressure sensor performs pressure detection on the area above the GINA waterstop 2. When the pressure is maintained at a fixed value, it indicates that the area above the GINA waterstop 2 has been sealed and its sealing is good. In addition, the setting of the first baffle 501 and the second baffle 502 can ensure the flatness and uniform force at the connection between the two tunnel sections 1 to a certain extent, and can also bear part of the axial tensile pressure of the tunnel to avoid excessive stress concentration on the GINA waterstop 2.

[0042] Example 2

[0043] The difference from the above embodiment is that it also includes a controller, the model of the controller is preferably SPC-STW-S0402CTR, and a laser rangefinder 6 for detecting the moving stroke of the second baffle 502 is installed on the side wall of the tunnel section 1. The laser rangefinder 6 is electrically connected to the controller and is located on the side of the second baffle 502 away from the iron block 702.

[0044] The specific implementation process is as follows: Since the GINA water stop 2 needs to be compressed to different degrees under different working conditions, the gap between the two tunnel sections 1 is different; when the first baffle 501 and the second baffle 502 are fixed under the adsorption of the electromagnet 701 and the iron block 702, due to the different gaps between the two tunnel sections 1, the first baffle 501 and the second baffle 502 move different distances on the tunnel section 1 (here the initial positions of the first baffle 501 and the second baffle 502 are fixed, and the first baffle 501 and the second baffle 502 need to move at the same time and the moving distances must be equal); at this time, the laser rangefinder 6 can measure the distance to the second baffle 502 and transmit the distance to the controller. The controller analyzes the moving distance of the second baffle 502 based on the distance after movement and the initial distance, and then determines the gap between the two tunnel sections 1 based on the moving distance, thereby obtaining the degree of compression of the GINA waterstop 2; based on the degree of compression, the staff can determine the compression deformation characteristics of the GINA waterstop 2 and determine whether the GINA waterstop 2 can withstand the external pressure of the tunnel, so as to make timely adjustments.

[0045] Example 3

[0046] The difference from the above embodiment is that the surfaces of the electromagnet 701 and the iron block 702 are both coated with an anti-corrosion layer.

[0047] The specific implementation process is as follows: the anti-corrosion layer can play an anti-corrosion role on the surface of the electromagnet 701 and the iron block 702, thereby improving the service life of the electromagnet 701 and the iron block 702 to a certain extent.

[0048] Example 4

[0049] The difference from the above embodiment is that an anti-rust layer is applied on the cable body 403 .

[0050] The specific implementation process is as follows: the anti-rust layer can play an anti-rust treatment on the surface of the cable body 403, thereby improving the service life of the cable body 403 to a certain extent.

[0051] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A flexible joint for an immersed tunnel, comprising a plurality of transversely arranged tunnel sections, with water stop components and longitudinal limit components provided between adjacent tunnel sections; and detection components are provided on adjacent tunnel sections for transverse sliding cooperation; The water-stop assembly is used to absorb the deformation energy generated by the relative displacement between the tunnel sections; The longitudinal limit assembly is used to maintain the compression amount of the water stop assembly; The detection component is used to detect the sealing and compression status of the water-stop component.

2. The immersed tube tunnel flexible joint according to claim 1, characterized in that: The waterstop assembly includes a GINA waterstop, both sides of which are fixedly connected to the side walls of the adjacent tunnel section; an OMEGA waterstop is provided below the GINA waterstop, both ends of which are fixedly connected to the bottom of the adjacent tunnel section.

3. The immersed tube tunnel flexible joint according to claim 2, characterized in that: The longitudinal limiting assembly comprises a cable sleeve pre-buried in the tunnel pipe section, a cable body is fixedly connected in the cable sleeve, and connecting sleeves are detachably connected by threads between adjacent cable bodies.

4. The immersed tube tunnel flexible joint according to claim 3, characterized in that: The detection assembly includes a first baffle and a second baffle, which are respectively located on adjacent tunnel sections and are laterally slidably matched with the adjacent tunnel sections; the first baffle and the second baffle are used to close the upper area of ​​the GINA waterstop; an electromagnet and an iron block are respectively installed on the side where the first baffle and the second baffle are close to each other.

5. The immersed tube tunnel flexible joint according to claim 4, characterized in that: A pressure sensor is installed on the upper portion of the inner side wall of the first baffle.

6. The immersed tube tunnel flexible joint according to claim 5, characterized in that: A laser rangefinder for detecting the movement stroke of the second baffle is installed on the side wall of the tunnel pipe section. The laser rangefinder is electrically connected to the controller and is located on the side of the second baffle away from the iron block.

7. The immersed tube tunnel flexible joint according to claim 6, characterized in that: The surfaces of the electromagnet and the iron block are coated with an anti-corrosion layer.

8. The immersed tube tunnel flexible joint according to claim 6, characterized in that: The construction method of the longitudinal limit assembly is: pull out the cable body in the cable sleeve; preliminarily thread the cable bodies at both ends to the two ends of the connecting sleeve respectively; straighten the cable bodies on both sides by using a tensioning jack; after straightening, tighten the cable bodies on both sides to the two ends of the connecting sleeve respectively; and remove the tensioning jack.

9. The immersed tube tunnel flexible joint according to claim 8, characterized in that: The cable body is coated with an anti-rust layer.

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