Immersed tube final joint

Abstract

The utility model relates to a final joint of an immersed tube, which belongs to the field of tunnel construction and comprises a tube section, an expansion section, a push-out section, a waterstop and at least one anti-sag suspension device. A channel is formed in the pipe section in the length direction of the pipe section. The expansion section is arranged at one end of the pipe section in the length direction. The push-out section is arranged in the expansion section. The push-out section is sleeved with the water stop belt. The two ends of the water stop belt are connected to the peripheral wall of the push-out section and the end wall of the expansion section correspondingly. The anti-sag suspension device is arranged on the expansion section and connected with the middle of the water stop belt, the anti-sag suspension device comprises a supporting rod and at least one suspension assembly, one end of the supporting rod is fixed to the end wall of the expansion section and extends in the axial direction of the pipe fitting, the suspension assembly comprises a sliding part and an elastic part, and the sliding part is arranged on the supporting rod in a sleeving mode and can move along the supporting rod; two ends of the elastic piece are respectively connected with the sliding piece and the waterstop.

Description

Technical Field

[0001] The utility model belongs to the technical field of underwater tunnel construction, in particular to a final joint of an immersed tube. Background Art

[0002] The immersed tube joint in tunnel construction is a key part of immersed tube tunnel construction, which involves the connection between two adjacent pipe sections or segments. According to the stress characteristics and functions, the immersed tube tunnel joints can be divided into pipe section joints, segment joints and final joints. At present, during the underwater "pre-placed push-out" steel shell immersed tube tunnel construction work of the immersed tube final joint, an expansion section and a push-out section are set at the bow end of the last pipe section to be sunk, and the push-out section is placed in the expansion section. After the final pipe joint is in place, the push-out section is extended and connected to the corresponding pipe joint. In order to prevent water from entering, a waterstop is set along the cross section between the push-out section and the exposed surface of the expansion section. The waterstop is a foldable and telescopic tube. One end of the waterstop is fixed to the cross-sectional end of the expansion section, and the other end is fixed to the push-out section. It is used to stop water and waterproof when the pipe section is installed in the immersed tube.

[0003] However, at the beginning of the test installation and when the installation is not smooth and the push-out section needs to be retracted into the expansion section, the waterstop will produce a large deformation under the action of its own weight and the stretching process, and the upper, lower and both sides of the waterstop will hang unevenly, causing the push-out section to not be pushed out smoothly, or the waterstop will be pulled by its own gravity and withdrawal and stretching, causing poor water sealing at the joint or even leakage, resulting in installation failure. Utility Model Content

[0004] To address the shortcomings of related technologies, the present invention provides a final immersed tube joint. By installing an anti-sagging suspension device at the end of the expansion section, the waterstop is suspended and connected to the expansion section, reducing the waterstop's overhanging deformation and ensuring uniform and regular stretching and compression. Furthermore, the reliable sealing structure at both ends and the anti-sagging suspension device reinforce the waterstop's watertight seal. This addresses the technical problem in the prior art where the waterstop's own weight-induced overhang deformation can easily result in the failure of the ejection section to be smoothly ejected or poor watertightness at the joint.

[0005] The utility model provides an immersed tube final joint, comprising:

[0006] a pipe segment, wherein the pipe segment is provided with a first passage extending axially therethrough;

[0007] an expansion section connected to one axial end of the pipe segment, the expansion section being provided with an axially penetrating second passage, wherein the caliber of the second passage is larger than the caliber of the first passage;

[0008] a push-out section, the push-out section being disposed in the expansion section and being movable axially along the expansion section;

[0009] A waterstop, one end of which is sealed and fixed to the end wall of the expansion section, and the other end of which is sealed and fixed to the outer peripheral wall of the push-out section and moves with the push-out section;

[0010] At least one anti-sagging suspension device, the anti-sagging suspension device is arranged on the expansion section and connected to the middle part of the waterstop, including:

[0011] A support rod, one end of which is connected to the same end wall where the expansion section and the water stop are connected, and the other end of which extends toward the axial pushing direction of the pushing section, wherein the length of the support rod is not less than the pushing stroke of the pushing section;

[0012] At least one suspension assembly, the suspension assembly being disposed on the support rod and comprising:

[0013] A sliding member, which is sleeved on the support rod and can slide along the length direction of the support rod;

[0014] An elastic member, one end of which is connected to the sliding member, and the other end of which is connected to the middle of the water stop strip, and a length of the elastic member before deformation is less than a distance between the support rod and the pushing section.

[0015] In the technical solution, an anti-sag suspension device is installed on the expansion section to connect the waterstop to the expansion section. The waterstop is suspended on the expansion section. When the push-out section is extended or retracted, the sliding member and the elastic member pull the waterstop to stretch and compress, limiting the waterstop's overhang deformation and ensuring uniform and regular stretching or compression. The anti-sag suspension device also serves as a reinforcement for the waterstop, improving its reliability and preventing the waterstop from being unable to be smoothly pushed out or poorly sealing the joint due to excessive overhang deformation caused by its own weight.

[0016] In some embodiments, one end of the support rod facing the pushing direction of the pushing section is bent away from the pushing section.

[0017] In the technical solution, the suspended end of the support rod of the anti-sagging suspension device is set to a shape that is bent away from the axial direction of the immersed tube joint, such as an arc hook, which can prevent the sliding part from sliding off the support rod.

[0018] In some embodiments, the number of the anti-sagging suspension devices is at least four, and the anti-sagging suspension devices are evenly distributed on the end wall of the expansion section.

[0019] In the technical solution, multiple anti-sagging suspension devices are evenly distributed around the waterstop, so that the waterstop is restrained at least on all four sides, thereby making the sagging deformation and reinforcement of the waterstop more uniform and making it easier to push out or retract the waterstop.

[0020] In some embodiments, the support rod is a tubular rod, the sliding member is a circular ring, and the ring diameter of the sliding member is larger than the outer diameter of the support rod.

[0021] In the technical solution, the support rod is set to a circular tubular structure, and a rod with light weight and high rigidity can be used, and its length and cross-sectional diameter are designed according to the pushing stroke of the pushing section. This structure can make the anti-sagging suspension device more reliable, and the sliding part is set to a circular ring structure. The sliding part can move more smoothly on the support rod, thereby making the pushing out or retraction of the water stop belt smoother and more reliable.

[0022] In some embodiments, the elastic member is an elastic rope, the waterstop is provided with rings corresponding to the number of the elastic ropes, and the elastic ropes are connected to the waterstop through the rings.

[0023] In the technical solution, the elastic part that pulls the waterstop is set as an elastic rope, which can have a certain degree of elastic deformation freedom when the waterstop is driven to move by the pushing section. It can effectively reduce the tensile deformation of the waterstop itself, improve the reliability of the waterstop, and ensure the water-stopping effect of the joint.

[0024] In some embodiments, a sealing and fixing device is provided at the connection between the water stop and the expansion section and the push-out section, and the sealing and fixing device includes:

[0025] A pressure plate, the pressure plate being arranged on the outer periphery of the end portion of the waterstop;

[0026] A pressure strip, the pressure strip being arranged between the pressure plate and the water stop;

[0027] The pressure plate is connected to the expansion section or the push-out section of the sealing connection of the waterstop belt through a first fastening bolt and presses the pressure strip, and the pressure strip presses the end of the waterstop belt.

[0028] In the technical solution, the two ends of the waterstop that are sealed to the push-out section and the expansion section are respectively reliably sealed by sealing fixing devices, the ends of the waterstop are directly pressed by the pressure strip, and a pressure plate fastened by a first fastening bolt is provided at the sealing part of the push-out section and the expansion section. A clamping structure is formed between the pressure plate and the sealing surface, and the pressure strip and the waterstop are placed therein, so that the ends of the waterstop are reliably sealed to the push-out section and the expansion section.

[0029] In some embodiments, the cross-section of the pressure plate is L-shaped, one end of the L-shaped short arm of the pressure plate is pressed against the expansion section or the push-out section of the waterstop sealing connection, the middle part of the L-shaped long arm of the pressure plate is connected to the expansion section or the push-out section of the waterstop sealing connection through a first fastening bolt, and the end of the L-shaped long arm of the pressure plate presses the pressure strip.

[0030] In the technical solution, the pressure plate is designed as a structure with an L-shaped cross-section. One end of the L-shaped short arm rests on the sealing surface, and the middle part of the L-shaped long arm is fastened to the seal by a group of fastening bolts in the fastening bolt assembly. The end of the L-shaped long arm presses the pressure strip on the other side of the fastening bolt to form a lever structure, so that the compression degree can be adjusted by the fastening bolts to fully tighten the waterstop belt, ensure that the fitting surface is watertight, and ensure the water-stopping effect of the waterstop belt at the final joint of the immersed tube.

[0031] In some embodiments, the L-shaped long arm end of the pressure plate is provided with a matching concave-convex structure on one side adjacent to the pressure strip, and the L-shaped long arm end of the pressure plate is pressed against the pressure strip by a fastening bolt assembly.

[0032] In the technical solution, the position where the pressure plate and the pressure strip are in contact and pressed is set to a concave-convex structure that cooperates with each other. The L-shaped long arm end of the pressure plate is pressed against the pressure strip by another set of fastening bolts in the fastening bolt assembly, so that the pressure strip will not be pulled and dislocated from the pressure plate. The pressure strip can firmly cooperate with the pressure plate to press the waterstop, thereby improving the sealing of the end of the waterstop, thereby ensuring the water-stopping effect of the waterstop on the final joint of the immersed tube.

[0033] In some embodiments, a serrated protrusion is provided on the inner side of the waterstop corresponding to the pressing portion of the pressure strip and in contact with the pushing section.

[0034] In the technical solution, the sealing fitting surface of the waterstop is set as a serrated protrusion. It is better to set the fitting surface of the push-out section or the expansion section with a matching serrated groove. Under the same pressure, the waterstop can fit more tightly and is not easy to slide, dislocate and detach from the pressure strip, so that the waterstop has a better water-stopping effect.

[0035] In some embodiments, both ends of the water stop are retaining rings with circular cross-sections, and the retaining rings are arranged between the pressure strip and the first fastening bolt.

[0036] In the technical solution, the end of the waterstop is configured as a retaining ring with a circular cross-section, and the retaining ring is clamped between the pressure strip and the first fastening bolt, further preventing the waterstop from being pulled away from the pressure of the pressure strip, thereby ensuring that the waterstop can be reliably sealed and giving the waterstop a better sealing effect.

[0037] Based on the above technical solution, in the embodiment of the present invention, an anti-sagging suspension device is provided at the end of the expansion section, allowing the waterstop to be movably suspended on the expansion section, thereby reducing the waterstop's overhang deformation and making its extension or compression uniform and regular. Furthermore, the reliable sealing structure at both ends and the anti-sagging suspension device reinforce the waterstop's watertightness and sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0039] Figure 1 This is a schematic diagram of the overall cross-sectional structure of an embodiment of the immersed tube final joint of the present invention when the push-out section is retracted;

[0040] Figure 2 This is a schematic cross-sectional view of the anti-sagging suspension device when the push-out section of an embodiment of the immersed tube final joint is retracted;

[0041] Figure 3 This is a schematic diagram of the overall cross-sectional structure of an embodiment of the immersed tube final joint of the present invention after the push-out section is pushed out;

[0042] Figure 4 This is a schematic cross-sectional view of the anti-sagging suspension device after the push-out section of an embodiment of the immersed tube final joint of the present invention is pushed out;

[0043] Figure 5 This is a schematic structural diagram of a sealing and fixing device on a push-out section of an embodiment of an immersed tube final joint of the utility model;

[0044] Figure 6 This is a schematic structural diagram of a sealing and fixing device on an expansion section of an embodiment of an immersed tube final joint of the present utility model;

[0045] Figure 7 This is a cross-sectional view of an embodiment of the immersed tube final joint of the utility model;

[0046] Figure 8 This is a cross-sectional view of the retaining ring structure of an embodiment of the immersed tube final joint of the present invention;

[0047] Figure 9 This is a cross-sectional view of an embodiment of the immersed tube final joint of the utility model;

[0048] Figure 10 This is a cross-sectional view of the retaining ring structure of an embodiment of the immersed tube final joint of the present invention;

[0049] Figure 11 This is a cross-sectional view of the retaining ring structure of an embodiment of the immersed tube final joint of the present invention.

[0050] In the picture:

[0051] 100, pipe segment; 200, expansion section; 300, push-out section; 310, sealing and fixing device; 320, pressure plate; 330, pressure strip; 340, fastening bolt assembly; 350, water stop; 400, baffle; 401, first connecting part; 402, first inclined part; 403, bending part; 500, first spring leaf; 501, second connecting part; 502, second inclined part; 600, second spring leaf; 601, third connecting part; 602, third inclined part; 700, threaded connection; 800, spacer; 900, anti-sagging suspension device; 910, support rod; 920, suspension assembly; 930, sliding part; 940, elastic part; 950, lifting ring. DETAILED DESCRIPTION

[0052] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described 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 any creative efforts are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0054] The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features.

[0055] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0056] As attached Figures 1 to 6As shown, in an exemplary embodiment of the immersed tube final joint of the present invention, the final joint comprises: a pipe segment 100, an expansion segment 200, a push-out segment 300, a pushing assembly, a waterstop 350, and an anti-sagging suspension device 900. A channel is defined along the length of the pipe segment 100, with openings at both ends communicating with the channel. The expansion segment 200 is disposed at one end of the pipe segment along its length, with the opening of the expansion segment 200 being larger than the opening of the pipe segment. The push-out segment 300 is disposed within the expansion segment 200. The pushing assembly is used to propel the push-out segment 300 along the length of the pipe segment 100. The waterstop 350 is sleeved over the push-out segment 300. The ends of the waterstop 350 are sealed to the outer circumferential wall of the push-out segment 300 and the end wall of the expansion segment 200, respectively.

[0057] In some embodiments, the pushing assembly may include a hydraulic cylinder. The hydraulic cylinder includes a cylinder body and a piston rod, and the piston rod is slidably connected to the cylinder body. The piston rod pushes out or pulls the pushing section 300 to achieve movement of the pushing section 300.

[0058] In some embodiments, the push-out section 300 is configured in a rectangular tubular shape. The waterstop 350 is also configured in a rectangular tubular shape. The waterstop 350 has a highly elastic thin-walled structure. When the push-out section 300 is pushed out, the waterstop 350 adheres to the outer surface of the push-out section 300 under the action of water pressure, only bearing pressure without tension, ensuring that the waterstop 350 will not be torn.

[0059] There is at least one anti-sag suspension device 900, which is installed on the expansion section 200, preferably on the expansion section 200 located on the top side of the immersed tube final joint. The anti-sag suspension device 900 is connected to the middle of the waterstop 350, suspending the waterstop 350 from the expansion section 200.

[0060] like Figure 2 as well as Figure 4 As shown, the anti-sag suspension device 900 includes a support rod 910 and a suspension assembly 920 mounted on the support rod 910. The suspension assembly 920 includes a sliding member 930 and an elastic member 940. One end of the support rod 910 is connected to the same end wall where the expansion section 200 and the waterstop 350 are connected, and the other end extends axially toward the push-out section 300. The length and diameter of the support rod 910 are set based on the push-out stroke of the push-out section 300, and the length must be at least equal to the push-out stroke of the push-out section 300. At least one suspension assembly 920 is provided, and the specific number is determined by the axial length of the waterstop 350. The sliding member 930 is mounted on the support rod 910 and can slide back and forth along the support rod 910. The elastic member 940 is stretchable, with one end connected to the sliding member 930 and the other end connected to the middle of the waterstop 350. The length of the elastic member 940 before deformation is less than the distance between the support rod 910 and the push-out section 300.

[0061] Through the above scheme, the anti-sagging suspension device 900 is provided on the expansion section 200, and the waterstop 350 is connected to the expansion section 200. The waterstop 350 is suspended and connected to the expansion section 200. When the push-out section 300 is pushed out or retracted, the sliding member 930 and the elastic member 940 involve the stretching and compression of the waterstop 350, limiting the suspension deformation of the waterstop 350, making its stretching or compression uniform and regular, and the anti-sagging suspension device 900 can serve as a reinforcement rib of the waterstop 350, improving the reliability of the waterstop 350, and avoiding the waterstop 350 from being able to smoothly push out the push-out section 300 or poor water-stopping at the joint due to the large suspension deformation of the waterstop 350 due to its own weight.

[0062] In some embodiments, one end of the support rod 910 facing the ejection direction of the ejection section 300 is bent away from the ejection section 300 , for example, into an arcuate hook shape, and the end of the arcuate hook shape prevents the sliding member 930 from sliding off the support rod 910 .

[0063] In some embodiments, at least four anti-sag suspension devices 900 are provided, and the anti-sag suspension devices 900 are evenly distributed on the end wall of the expansion section 200. That is, the upper and lower surfaces and both side surfaces of the waterstop 350 are suspended and connected to the expansion section 200 through the anti-sag suspension devices 900, so that the waterstop 350 is restrained at least on all four sides, the sag deformation and reinforcement of the waterstop 350 are more uniform, and the waterstop 350 can be pushed out or retracted more smoothly.

[0064] In some embodiments, the support rod 910 is a cylindrical rod, the sliding member 930 is a circular ring, and the ring diameter of the sliding member 930 is larger than the outer diameter of the support rod 910 , so that the sliding member 930 can move more smoothly on the support rod 910 .

[0065] Furthermore, the support rod 910 can be a rod with light weight and high rigidity. The sliding member 930 is configured as a ring slightly larger than the outer diameter of the support rod 910.

[0066] In some embodiments, the elastic member 940 is an elastic cord, and the waterstop 350 is provided with a corresponding number of rings 950 as the number of the elastic cords, and the elastic cords are connected to the waterstop 350 through the rings 950. When the waterstop 350 is moved by the push-out section 300, the elastic member 940 can be stretched, allowing the waterstop 350 to have a certain degree of elastic deformation freedom, effectively reducing the tensile deformation of the waterstop 350 itself, and preventing the waterstop 350 from being pulled and torn by the rigid suspension.

[0067] Furthermore, both ends of the elastic rope are rope buckles, which are cross-linked with the circular ring of the sliding member 930 and the hanging ring 950 on the water stop belt 350 respectively.

[0068] In some embodiments, as Figure 5 as well as Figure 6As shown, the connection between the waterstop 350 and the expansion section 200 and the push-out section 300 is provided with a sealing fixing device 310, that is, the two ends of the waterstop 350 are sealed with the expansion section 200 and the push-out section 300 through a sealing fixing device 310. The sealing fixing device 310 includes a pressure plate 320, a pressure strip 330 and a fastening bolt assembly 340. The pressure plate 320 is arranged at the outer periphery of the end of the waterstop 350, and the pressure strip 330 is arranged between the pressure plate 320 and the waterstop 350. Therefore, the pressure strip 330 and the pressure plate 320 are both circular ring components as a whole. The pressure plate 320 is connected to the expansion section 200 or the push-out section 300 sealed with the waterstop 350 through the fastening bolt assembly 340 and presses the pressure strip 330, and the pressure strip 330 presses the end of the waterstop 350.

[0069] In some embodiments, the cross-section of the pressure plate 320 is L-shaped, with one end of the L-shaped short arm of the pressure plate 320 pressing against the expansion section 200 or the push-out section 300 to which the waterstop 350 is sealed. The middle portion of the L-shaped long arm of the pressure plate 320 is connected to the expansion section 200 or the push-out section 300 to which the waterstop 350 is sealed via a fastening bolt assembly 340, and the end of the L-shaped long arm of the pressure plate 320 presses against the pressure strip 330. The L-shape of the pressure plate 320 and a group of fastening bolts in the fastening bolt assembly 340 form a lever structure, and the tightness is adjusted by the fastening bolts to fully compress the waterstop 350 and ensure that the fitting surface is watertight.

[0070] In some embodiments, the L-shaped long arm end of the pressure plate 320 is provided with a matching concave-convex structure on the side adjacent to the pressure strip 330, and the L-shaped long arm end of the pressure plate 320 is pressed against the pressure strip 330 by another set of fastening bolts in the fastening bolt assembly 340. The matching concave-convex structure makes the pressure strip 330 and the pressure plate 320 bite together to prevent the pressure strip 330 from shifting.

[0071] In some embodiments, a serrated protrusion is provided on the inner side of the water stop 350 corresponding to the compressed portion of the pressure strip 330 and in contact with the pushing section 300 .

[0072] Furthermore, the contact surface of the pushing section 300 or the expanding section 200 is provided with a matching serrated groove.

[0073] In some embodiments, both ends of the water stop 350 are circular cross-section retaining rings, which are disposed between the bead 330 and the first fastening bolt. By clamping the retaining ring between the bead 330 and the first fastening bolt, the water stop 350 is further prevented from being pulled away from the bead 330.

[0074] Through the description of multiple embodiments of the immersed tube final joint of the present invention, it can be seen that the embodiments of the immersed tube final joint of the present invention have at least one or more of the following advantages:

[0075] 1. By installing an anti-sagging suspension device 900 on the expansion section 200, the waterstop 350 is connected to the expansion section 200. The waterstop 350 is suspended on the expansion section 200. When the push-out section 300 is pushed out or retracted, the sliding member 930 and the elastic member 940 pull the waterstop 350 in tension and compression, limiting the overhang deformation of the waterstop 350 and ensuring uniform and regular stretching or compression. The anti-sagging suspension device 900 also serves as a reinforcement for the waterstop 350, improving its reliability and preventing the waterstop 350 from being smoothly pushed out or poorly sealed at the joint due to the waterstop 350's significant overhang deformation due to its own weight.

[0076] 2. By using a sealing and fastening device based on the lever principle at both ends of the waterstop 350, the waterstop 350 is reliably sealed and fastened to the push-out section 300 and the expansion section 200, which can ensure that the waterstop 350 is driven to stretch or compress evenly and stably, thereby ensuring that the push-out section 300 is pushed out smoothly and that the final joint of the immersed tube is watertight.

[0077] Referring to all the accompanying drawings, an illustrative embodiment of the immersed tube final joint of the present invention includes: a pipe segment 100, an expansion segment 200, a push-out segment 300, a push assembly, a waterstop 350, and a retaining ring structure. A channel is defined along the length of the pipe segment 100, with openings at both ends communicating with the channel. The expansion segment 200 is located at one end of the pipe segment, with the opening of the expansion segment 200 being larger than the opening of the pipe segment. The push-out segment 300 is disposed within the expansion segment 200. The push assembly is used to propel the push-out segment 300 along the length of the pipe segment 100. The waterstop 350 is mounted over the push-out segment 300. The ends of the waterstop 350 are connected to the outer peripheral wall of the push-out segment 300 and the end wall of the expansion segment 200, respectively.

[0078] The retaining ring structure is located on the end wall of the push-out section 300 facing the waterstop 350 and is positioned between the waterstop 350 and the push-out section 300. The retaining ring structure includes a retaining member 400, a first spring leaf 500, and a connecting assembly. The retaining member 400 is positioned over the push-out section 300 and is tilted away from the pipe segment 100, toward the push-out section 300. The first spring leaf 500 is attached to the side of the retaining member 400 facing the expansion section 200. The connecting assembly secures the retaining member 400 and the first spring leaf 500 to the expansion section 200.

[0079] With the above solution, the retaining ring structure provides a barrier, preventing the waterstop 350 from being caught in the gap during the extension and retraction of the push-out section 300, thereby improving the reliability and durability of the joint. Furthermore, the first spring leaf 500 supports the stopper 400, preventing failure or damage to the stopper 400.

[0080] In some embodiments, the pushing assembly may include a hydraulic cylinder. The hydraulic cylinder includes a cylinder body and a piston rod, and the piston rod is slidably connected to the cylinder body. The piston rod pushes out or pulls the pushing section 300 to achieve movement of the pushing section 300.

[0081] In some embodiments, the ejection section 300 is configured in a rectangular tubular shape. The stopper 400 is also configured in a rectangular tubular shape. The stopper 400 is sleeved around the ejection section 300.

[0082] In some embodiments, the stopper 400 includes a first connecting portion 401 , and the first connecting portion 401 is used to connect the assembly to the expansion section 200 .

[0083] Furthermore, the first connecting portion 401 is parallel to the end wall of the expansion section 200 to facilitate stability after connection.

[0084] In some embodiments, the stopper 400 further includes a first inclined portion 402 connected to the first connecting portion 401. The first inclined portion 402 is inclined from the direction toward the ejection section 300 toward the direction away from the pipe segment 100. The design of the first inclined portion 402 helps the stopper 400 to smoothly guide the waterstop 350 when the ejection section 300 moves, preventing it from being caught in gaps.

[0085] Furthermore, the first connecting portion 401 and the first inclined portion 402 are integrally formed, thereby improving the strength of the structure and preventing breakage.

[0086] In some embodiments, the stopper 400 further includes a curved portion 403 connected to the end of the first inclined portion 402 away from the first connecting portion 401; the center of the curved portion 403 faces the side away from the expansion section 200. The curved portion 403 further enhances the flexibility and smoothness of the stopper 400 in guiding the waterstop 350, reducing the risk of the waterstop 350 being caught in gaps.

[0087] In some embodiments, the bent portion 403 is integrally formed with the first inclined portion 402 and the first connecting portion 401 to improve the overall structural strength of the blocking member 400 .

[0088] In some embodiments, the end of the curved portion 403 away from the first inclined portion 402 is spherical, thereby avoiding scratching the push-out section 300 or the water stop 350 .

[0089] In some embodiments, the first spring piece 500 includes a second connecting portion 501 , and the second connecting portion 501 is attached to a side of the first connecting portion 401 facing the expansion section 200 .

[0090] Furthermore, the second connecting portion 501 is parallel to the first connecting portion 401. The second connecting portion 501 improves the connection effect and stability with the first connecting portion 401 and the expansion section 200.

[0091] In some embodiments, the first spring piece 500 includes a second inclined portion 502, which fits closely to the first inclined portion 402. The spring piece can fit closely to the stopper 400, providing sufficient elasticity and support to ensure that the waterstop 350 remains stable when the push-out section 300 moves.

[0092] In some embodiments, a second spring sheet 600 is attached to the side of the first spring sheet 500 away from the stopper 400. This double-layer spring sheet design further enhances the elasticity and support force around the waterstop 350, improving the sealing effect and durability of the waterstop 350.

[0093] In some embodiments, the second spring piece 600 includes a third connecting portion 601 , and the third connecting portion 601 is attached to the second connecting portion 501 .

[0094] Furthermore, the third connecting portion 601 is parallel to the second connecting portion 501 , thereby improving the connection stability among the first spring piece 500 , the second spring piece 600 and the blocking member 400 .

[0095] In some embodiments, the second spring sheet 600 includes a third inclined portion 602, which is attached to the second inclined portion 502. This allows the two layers of spring sheets to work together to provide better elasticity and support, ensuring the stability and sealing of the waterstop 350 under complex working conditions.

[0096] In some embodiments, the first spring leaf 500 is made of manganese bronze, while the second spring leaf 600 is made of manganese steel. This choice of materials ensures that the first and second spring leaves 500 and 600 possess both sufficient elasticity and durability, adapting to the complex underwater environment. The double-layered spring leaves offer high elasticity and strength, supporting the transitional compression of the ultra-high polymer retaining ring. Furthermore, their elastic deformation can accommodate deviations in the ejection section 300 during ejection.

[0097] In some embodiments, the length of the third inclined portion 602 is less than that of the second inclined portion 502. This allows the second spring piece 600 to provide elasticity and support without excessively restricting the movement of the ejection section 300, thereby ensuring the flexibility and reliability of the joint.

[0098] In some embodiments, the connection assembly includes a threaded connector 700, which sequentially passes through the first connecting portion 401, the second connecting portion 501, and the third connecting portion 601, and is then threadedly connected to the expansion section 200. This design allows the retaining ring structure and the spring leaf to be securely fixed to the expansion section 200, improving the overall stability and durability of the joint.

[0099] Furthermore, a plurality of threaded connectors 700 are provided at intervals around the edge of the stopper 400 to achieve stable fixation of the retaining ring structure on the expansion section 200 .

[0100] In some embodiments, the connection assembly further includes a spacer 800, which is disposed on the side of the first connection portion 401 away from the expansion section 200. The threaded connector 700 also extends through the spacer 800. Specifically, the threaded connector 700 extends through the spacer 800, the first connection portion 401, the second connection portion 501, and the third connection portion 601, and then is threadedly connected to the expansion section 200. This further enhances the stability and reliability of the connection assembly and prevents joint failure caused by loosening of the threaded connector 700.

[0101] In some embodiments, the spacer 800 may be a long strip, and the plurality of threaded connectors 700 all pass through one spacer 800 , thereby improving the effect of pressing the stopper 400 against the expansion section 200 .

[0102] In some embodiments, the spacer 800 may be in the shape of a rectangular ring, which is sleeved on the pushing section 300 and connected to the expansion section 200 , further improving the effect of pressing the stopper 400 against the expansion section 200 .

[0103] Through the description of multiple embodiments of the immersed tube final joint of the present invention, it can be seen that the embodiments of the immersed tube final joint of the present invention have at least one or more of the following advantages:

[0104] 1. The retaining ring structure prevents the water stop 350 from being caught in the gap during the extension and retraction of the push-out section 300, thereby improving the reliability and durability of the joint. The first spring leaf 500 also supports the stopper 400 to prevent failure or damage to the stopper 400.

[0105] 2. The double-layer spring leaf has high elasticity and strength, supporting the transition compression of the ultra-high polymer retaining ring. At the same time, its elastic deformation can adapt to the impact caused by the deviation of the ejection section 300 during the ejection procedure.

[0106] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0107] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. A final joint of an immersed tube, characterized in that: include: a pipe segment, wherein the pipe segment is provided with a first passage extending axially therethrough; an expansion section connected to one axial end of the pipe segment, the expansion section being provided with an axially extending second passage, wherein the caliber of the second passage is larger than the caliber of the first passage; a push-out section, the push-out section being disposed in the expansion section and being movable axially along the expansion section; A waterstop, one end of which is sealed and fixed to the end wall of the expansion section, and the other end of which is sealed and fixed to the outer peripheral wall of the push-out section and moves with the push-out section; At least one anti-sagging suspension device, the anti-sagging suspension device is arranged on the expansion section and connected to the middle part of the waterstop, including: A support rod, one end of which is connected to the same end wall where the expansion section and the water stop are connected, and the other end of which extends toward the axial pushing direction of the pushing section, wherein the length of the support rod is not less than the pushing stroke of the pushing section; At least one suspension assembly, the suspension assembly being disposed on the support rod and comprising: A sliding member, which is sleeved on the support rod and can slide along the length direction of the support rod; An elastic member, one end of which is connected to the sliding member, and the other end of which is connected to the middle of the water stop strip, and a length of the elastic member before deformation is less than a distance between the support rod and the pushing section.

2. The immersed tube final joint according to claim 1, characterized in that: One end of the support rod facing the pushing direction of the pushing section is bent away from the pushing section.

3. The immersed tube final joint according to claim 1, characterized in that: The anti-sagging suspension devices are provided in at least four pieces, and the anti-sagging suspension devices are evenly distributed on the end wall of the expansion section.

4. The immersed tube final joint according to claim 1, characterized in that: The support rod is a cylindrical rod, the sliding member is a circular ring member, and the ring diameter of the sliding member is larger than the outer diameter of the support rod.

5. The immersed tube final joint according to claim 1, characterized in that: The elastic member is an elastic rope, and the waterstop is provided with hanging rings corresponding to the number of the elastic ropes, and the elastic ropes are connected to the waterstop through the hanging rings.

6. The immersed tube final joint according to claim 1, characterized in that: The connection between the water stop strip, the expansion section and the push-out section is provided with a sealing fixing device, and the sealing fixing device includes: A pressure plate, the pressure plate being arranged on the outer periphery of the end portion of the waterstop; A pressure strip, the pressure strip being arranged between the pressure plate and the water stop; The pressure plate is connected to the expansion section or the push-out section of the sealing connection of the waterstop belt through a fastening bolt assembly and presses the pressure strip, and the pressure strip presses the end of the waterstop belt.

7. The immersed tube final joint according to claim 6, characterized in that: The cross-section of the pressure plate is L-shaped, and one end of the L-shaped short arm of the pressure plate is pressed against the expansion section or the push-out section of the waterstop sealing connection. The middle part of the L-shaped long arm of the pressure plate is connected to the expansion section or the push-out section of the waterstop sealing connection through a fastening bolt assembly, and the end of the L-shaped long arm of the pressure plate presses the pressure strip.

8. The immersed tube final joint according to claim 7, characterized in that: The L-shaped long arm end of the pressure plate is provided with a matching concave-convex structure on one side adjacent to the pressure strip, and the L-shaped long arm end of the pressure plate is pressed against the pressure strip by a fastening bolt assembly.

9. The immersed tube final joint according to claim 8, characterized in that: The inner side of the water stop corresponding to the pressing portion of the pressure strip and in contact with the pushing section is provided with a serrated protrusion.

10. The immersed tube final joint according to claim 6, characterized in that: Both ends of the water stop are retaining rings with circular cross-sections, and the retaining rings are arranged between the pressure strip and the fastening bolt assembly.

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