Rubber waterstop for underwater tunnel

Abstract

The application relates to the field of bridge, building and tunnel engineering water stop applications, and particularly provides a rubber water stop belt for underwater tunnels, which comprises a non-fixed end connecting piece, a fixed end connecting piece and a water stop belt body; a multilayer sealing body is arranged between the water stop belt body and the non-fixed end connecting piece, a guide body is arranged between the water stop belt body and the fixed end connecting piece, a water stop belt pressing plate is further arranged between the water stop belt body and the fixed end connecting piece, and the water stop belt body comprises a multi-surface segment combined compression surface; wherein the multilayer sealing body comprises a rib convex body and a pit body, the guide body comprises an outer guide body and an inner guide body, the water stop belt pressing plate comprises an integrated outer connecting plate and an inner connecting plate, and the multi-surface segment combined compression surface comprises an arc surface segment one, an arc surface segment two and a straight surface segment. The patent scheme can play a water stop belt installation positioning guiding role, can reduce the occurrence of water stop belt abrasion phenomenon, saves water stop belt installation time, and improves the sealing performance of the water stop belt.

Description

Technical Field

[0001] This invention relates to the field of water-stopping technology for bridge, building and tunnel engineering, and in particular to a rubber waterstop for underwater tunnels. Background Technology

[0002] Pipe end joints are a critical component of underwater tunnels. Their structural strength and rigidity are significantly weaker compared to concrete pipe sections, making them a vulnerable point in underwater tunnels. Currently, most immersed tunnels built internationally and domestically utilize flexible joint connections. These joints leverage the strong water pressure acting on the rear of the pipe section, using horizontal jacks to press and apply GINA waterstops for initial water sealing. Water is then pumped out of the joint until complete sealing. Finally, OMEGA waterstops are installed on the inner side as a second line of defense to meet the water-stopping requirements of the pipe joint. Existing technologies include the following patents concerning waterstops for pipe end joints used in tunnels:

[0003] 1. Patent No. 201610251593.8, entitled "A Suspended Tunnel Joint in Water," discloses an underwater suspended tunnel joint comprising two pipe sections joined together, with a joint space between the two sections. The two sections are connected by a vibration damping structure and a sealing structure. The vibration damping structure includes a connecting sleeve, a prestressed cable, and a tensioning device. This invention ensures that GINA rubber waterstops will not leak due to misalignment.

[0004] 2. The invention patent with patent number "201610322564.6" and patent name "A Joint Device for Immersed Tubes and Its Installation Method" includes two flexible waterstops and two grouting layers with a certain rigidity, as well as GINA waterstops and OMEGA waterstops. A protective cover is set around the joint. This invention has low construction cost and is easy to operate.

[0005] The aforementioned existing technologies mainly have the following problems:

[0006] 1. When the OMEGA waterstop is damaged, if the GINA waterstop is in good condition, the OMEGA waterstop can be replaced at any time to ensure the reliability of the water stop at the pipe joint. However, when the external GINA waterstop is severely damaged, the internal OMEGA waterstop plays the main role in waterproofing and cannot be replaced. There are currently no precedents for repairing it at home and abroad.

[0007] 2. Uneven settlement of the immersed tube foundation and pipe section can also easily lead to misalignment and stretching of the flexible joint, reducing or even eliminating the water-stopping effect of the joint, which seriously affects the safe operation of the underwater tunnel.

[0008] In conclusion, how to design a waterstop structure for underwater tunnels that can improve sealing and water-stopping performance, extend service life, and meet the requirements of uneven settlement and tension / compression in underwater tunnels is an urgent problem to be solved. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a rubber waterstop for underwater tunnels. This waterstop utilizes a guide body that engages with the fixed-end connector and a sealing body that engages with the non-fixed-end connector to save installation time, reduce wear, extend service life, and improve sealing performance.

[0010] To achieve the above objectives, the present invention proposes the following technical solution: a rubber waterstop for underwater tunnels, comprising a non-fixed end connector, a fixed end connector, and a waterstop body located between the non-fixed end connector and the fixed end connector; the waterstop body and the non-fixed end connector include a multi-layer sealing body, the waterstop body and the fixed end connector include a guide body, and the waterstop body and the fixed end connector also include a waterstop pressure plate; the waterstop body includes a multi-segment combined compression surface located between the non-fixed end connector and the fixed end connector.

[0011] Furthermore, the multilayer seal includes a ribbed protrusion on the connecting end face of the waterstop body at the connection point with the non-fixed end connector, with the ribbed protrusion positioned near both ends of the connecting end face.

[0012] Furthermore, the multilayer sealing body also includes recesses located between the ribbed protrusions.

[0013] Furthermore, the guide body includes an outer guide body and an inner guide body located on the connecting end face two at the connection point with the fixed end connector in the waterstop body. Both the outer guide body and the inner guide body protrude toward the fixed end connector. The outer guide body includes two symmetrically arranged sets, with the inner guide body located between the outer guide bodies.

[0014] Furthermore, the outer guide body and the ribbed protrusion are respectively located at the same height; the volume of the inner guide body is larger than that of the outer guide body, and the inner wall of the fixed end connector is provided with a guide groove that matches the outer guide body.

[0015] Furthermore, the ribbed protrusions, inner guide bodies, and outer guide bodies are one or more of the trapezoidal structure, rectangular structure, and arc-shaped structure, respectively.

[0016] Furthermore, the waterstop pressure plate includes an integral outer connecting plate and an inner connecting plate. The connection between the waterstop body and the fixed end connector is located between the inner connecting plate and the fixed end connector, and the outer connecting plate is set close to the fixed end connector. The inner end of the outer connecting plate abuts against the waterstop body, and the side end of the outer connecting plate close to the fixed end connector abuts against the fixed end connector.

[0017] Furthermore, the multi-segment combined compression surface includes an arc-shaped segment one near the non-fixed end connector, a straight segment near the fixed end connector, and an arc-shaped segment two located between the arc-shaped segment one and the straight segment; both the arc-shaped segment one and the arc-shaped segment two protrude toward the side away from the axial center line L of the rubber waterstop, and the straight segment two extends toward the side away from the axial center line L. The overall height of the straight segment in the vertical direction is greater than the overall maximum height of the arc-shaped segment one and the arc-shaped segment two in the vertical direction; the waterstop pressure plate abuts against the straight segment.

[0018] Furthermore, both arc segment one and arc segment two are hemispherical structures, and the diameter R1 of arc segment one is larger than the diameter R2 of arc segment two; arc segment one and arc segment two are respectively connected by circular arc one and circular arc two protruding towards the axial center line L.

[0019] Furthermore, the mathematical model of the ribbed protrusion is as follows:

[0020] f(x) = a1sin(x);

[0021] Where: the value of a1 is in the range of 5-10, and the value of x is in the range of 0-π.

[0022] The beneficial effects of this invention are:

[0023] 1. In this invention, a guide structure is added to the fixed end connector of the rubber waterstop, which can play a role in guiding the installation and positioning of the waterstop, saving the installation time of the waterstop and improving the sealing performance of the waterstop.

[0024] 2. The multi-layer sealing body in the non-fixed end connector of the present invention includes a biomimetic pit body. The pit body can form multiple sealing spaces between the waterstop body and the non-fixed end connector, thereby improving the sealing performance. When the tunnel vibrates and deforms, the pit body can store impurities between the contact surfaces, thereby reducing wear.

[0025] 3. The multi-layer sealing body in the non-fixed end connector of the present invention also includes a ribbed protrusion, which can enhance the sealing performance and push impurities between the contact surfaces into the pit when the underwater tunnel pipe joint vibrates and deforms, thereby reducing the abrasive wear of the contact surfaces and improving the service life of the waterstop.

[0026] 4. The W-shaped multi-segment combined compression surface structure in the waterstop body can be used to fill the compression of the waterstop, realize the rapid compression of the waterstop, and help withstand the large displacement and shear of the tunnel joint. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the rubber waterstop for underwater tunnels provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the waterstop body provided in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the recessed body and the ridged protrusion provided in the embodiment of the present invention.

[0030] Figure 4 This is a side view schematic diagram of the ribbed protrusion provided in an embodiment of the present invention.

[0031] Figure 5 This is a structural schematic diagram of the fixed-end connector.

[0032] Reference numerals in the attached drawings: 1. Non-fixed end connector; 2. Waterstop body; 3. Waterstop pressure plate; 4. Fixed end connector; 5. Guide body; 6. Ribbed protrusion; 7. Outer guide body; 8. Recess; 9. Guide groove; 10. Inner guide body; 11. Outer connecting plate; 12. Inner connecting plate; 14. Arc segment one; 15. Arc segment two; 16. Straight segment; 17. Arc one; 18. Fastening bolt; 19. Connecting end face one; 20. Connecting end face two; 21. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof.

[0034] A rubber waterstop for underwater tunnels is mainly used to connect pipe sections in underwater tunnels as the first layer of waterproofing. The primary material for this first layer of waterproofing is GINA waterstop. Figure 1 As shown, the rubber waterstop includes a non-fixed end connector 1, a fixed end connector 4, and a waterstop body 2, with the waterstop body 2 located between the non-fixed end connector 1 and the fixed end connector 4. The waterstop body 2 and the non-fixed end connector 1 include a multi-layer sealing body; the waterstop body 2 and the fixed end connector 4 include a guide body 5; and the waterstop body 2 and the fixed end connector 4 also include a waterstop pressure plate 3. The waterstop body 2 includes a multi-segment combined compression surface located between the non-fixed end connector 1 and the fixed end connector 4.

[0035] Bionic non-smooth surface technology is a research direction in bionics. Under the conditions of natural selection and survival of the fittest, many plants and animals have evolved non-smooth surfaces with good sealing, wear resistance, and lubrication properties. Examples include the pitted structure on the surface of an octopus's tentacle suckers, the adsorption and sealing properties of the suckers on the top of a remora's head, and the lubrication of an earthworm's skin. Applying bionic non-smooth technology to water-stop sealing structures, giving them good sealing and wear resistance, can improve the service life and safety of the entire sealing system. The multi-layer sealing body and guide body 5 in this invention are both designed based on the bionic non-smooth surface mechanism, which can effectively improve the water-stopping performance of the waterstop, increase its service life, and reduce damage to related components caused by waterstop failure.

[0036] like Figure 1-3 As shown, the multi-layer sealing body includes a ribbed protrusion 6, which is located on the connecting end face 20 at the connection point between the waterstop body 2 and the non-fixed end connector 1. The ribbed protrusion 6 is positioned near both ends of the connecting end face 20. The ribbed protrusion 6 enhances the sealing performance. Furthermore, when the underwater tunnel joint vibrates and deforms, it can push impurities between the contact surfaces into the recess 8, reducing abrasive wear on the contact surfaces and extending the service life of the waterstop. The ribbed protrusion 6 can be a trapezoidal, rectangular, or arc-shaped structure. In this embodiment, the ribbed protrusion 6 is... Figure 4 The mathematical model of the arc-shaped structure shown, with its ridged protrusion 6, is as follows:

[0037] f(x) = a1sin(x);

[0038] Where: the value of a1 is in the range of 5-10, and the value of x is in the range of 0-π.

[0039] like Figure 1-3 As shown, the multi-layer sealing body also includes recesses 8 between the ribbed protrusions 6. The recesses 8 can form multiple sealing spaces between the waterstop body 2 and the non-fixed end connector 1, improving the sealing performance. When the tunnel vibrates and deforms, they can store impurities between the contact surfaces, reducing wear.

[0040] like Figure 1 , 2 As shown in Figure 5, the guide body 5 includes an outer guide body 7 and an inner guide body 10. The outer guide body 7 and the inner guide body 10 are located on the connecting end face 21 of the waterstop body 2 at the connection with the fixed end connector 4. Both the outer guide body 7 and the inner guide body 10 protrude towards the fixed end connector 4. The outer guide body 7 includes two symmetrically arranged groups, and the inner guide body 10 is located between the outer guide bodies 7. The inner guide body 10 and the outer guide body 7 are one or more of the following: trapezoidal structure, rectangular structure, and arc structure. In this embodiment, both the inner guide body 10 and the outer guide body 7 are isosceles trapezoidal structures.

[0041] The outer guide body 7 and the ribbed protrusion 6 are respectively located at the same height. The volume of the inner guide body 10 is larger than that of the outer guide body 7. The inner guide body 10 is located in the middle of the connecting end face 21 to improve the stability of the guide. Figure 5 As shown, the inner wall of the fixed end connector 4 is provided with a guide groove 9 that matches the outer guide body 7, and the guide groove 9 is in the shape of an isosceles trapezoid.

[0042] like Figure 1 As shown, the multi-segment combined compression surface includes an arc segment 14 near the non-fixed end connector 1, a straight segment 16 near the fixed end connector 4, and an arc segment 15 located between the arc segment 14 and the straight segment 16. The arc segment 14, the arc segment 15, and the straight segment 16 are W-shaped as a whole. The arc segment 14 and the arc segment 15 both protrude toward the side away from the axial center line L of the rubber waterstop. The straight segment 16 extends toward the side away from the axial center line L. The overall height of the straight segment 16 in the vertical direction M is greater than the overall maximum height of the arc segment 14 and the arc segment 15 in the vertical direction. The overall maximum height of the arc segment 14 and the arc segment 15 in the vertical direction M is the height of the arc apex D1 of the arc segment 14 and the arc apex D2 of the arc segment 15 in the vertical direction M.

[0043] like Figure 1 , 2 As shown, both arc segment 14 and arc segment 2 15 are hemispherical structures, and the diameter R1 of arc segment 14 is larger than the diameter R2 of arc segment 2 15. This is to fill the compression of the waterstop body 2, so as to achieve rapid compression of the waterstop and help withstand the large displacement and shear of the tunnel joint. The arc segment 14 and arc segment 2 15, and the arc segment 2 15 and the straight segment 16 are respectively connected by arc 17 and arc 2 18 protruding towards the axial center line L, so as to improve the compression performance of the waterstop body 2.

[0044] The waterstop pressure plate 3 abuts against the straight section 16; the waterstop pressure plate 3 includes an integral outer connecting plate 11 and an inner connecting plate 12. The connection between the waterstop body 2 and the fixed end connector 4 is located between the inner connecting plate 12 and the fixed end connector 4, that is, the straight section 16 is located between the inner connecting plate 12 and the fixed end connector 4. The outer connecting plate 11 is set close to the fixed end connector 4; the inner end of the outer connecting plate 11 abuts against the straight section 16 of the waterstop body 2, and the side end of the outer connecting plate 11 close to the fixed end connector 4 abuts against the fixed end connector 4; the waterstop pressure plate 3, the straight section 16 and the fixed end connector 4 are connected by fastening bolts 19.

[0045] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0046] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rubber waterstop for underwater tunnels, characterized by, The utility model provides a kind of rubber waterstop, including non-fixed end connecting piece (1), fixed end connecting piece (4) and located between non-fixed end connecting piece (1) and fixed end connecting piece (4) waterstop body (2);The waterstop body (2) and non-fixed end connecting piece (1) between including multilayer sealing body, waterstop body (2) and fixed end connecting piece (4) between including guide body (5), waterstop body (2) and fixed end connecting piece (4) between still including waterstop plate (3);Waterstop body (2) includes the multiaspect segment combined compression surface between non-fixed end connecting piece (1) and fixed end connecting piece (4);The multilayer sealing body includes the ridge line protruding body (6) on connecting end face one of waterstop body (2) and non-fixed end connecting piece (1) connection place, the ridge line protruding body (6) is close to the both ends of connecting end face one and is arranged;The multilayer sealing body further includes the pit body (8) between ridge line protruding body (6);The guide body (5) includes the outer guide body (7) and inner guide body (10) on connecting end face two of waterstop body (2) and fixed end connecting piece (4) connection place, the outer guide body (7) and inner guide body (10) are all protruding and are arranged towards fixed end connecting piece (4);Outer guide body (7) includes symmetrically arranged two groups and inner guide body (10) is located between outer guide body (7);The outer guide body (7) and ridge line protruding body (6) are correspondingly arranged at the same height;The volume of the inner guide body (10) is greater than the volume of outer guide body (7), and the inner wall of the fixed end connecting piece (4) is provided with a guide groove (9) matched with the outer guide body (7).

2. The rubber waterstop for underwater tunnels according to claim 1, characterized by, The ridge line protruding body (6), the inner guide body (10) and the outer guide body (7) are one or more of trapezoidal structure, rectangular structure and circular arc structure.

3. The rubber waterstop for underwater tunnels according to claim 2, characterized in that, The waterstop plate (3) includes an integrated outer connecting plate (11) and an inner connecting plate (12), the connection between the waterstop body (2) and the fixed end connecting piece (4) is located between the inner connecting plate (12) and the fixed end connecting piece (4), and the outer connecting plate (11) is arranged close to the fixed end connecting piece (4). The inner end of the outer connecting plate (11) abuts against the waterstop body (2), and the side end of the outer connecting plate (11) close to the fixed end connecting piece (4) abuts against the fixed end connecting piece (4).

4. The rubber waterstop for underwater tunnels according to any one of claims 1 to 3, characterized in that, The multiaspect segment combined compression surface includes an arc surface segment one (14) close to the non-fixed end connecting piece (1), a straight surface segment (16) close to the fixed end connecting piece (4), and an arc surface segment two (15) between the arc surface segment one (14) and the straight surface segment (16). The arc surface segment one (14) and the arc surface segment two (15) protrude towards the side away from the axial center line L of the rubber waterstop, the straight surface segment (16) extends towards the side away from the axial center line L, and the overall height of the straight surface segment (16) in the vertical direction is greater than the overall highest height of the arc surface segment one (14) and the arc surface segment two (15) in the vertical direction. The waterstop plate (3) abuts against the straight surface segment (16).

5. The rubber waterstop for underwater tunnels according to claim 4, characterized in that, The arc surface section one (14) and the arc surface section two (15) are both hemispherical structures, and the diameter R1 of the arc surface section one (14) is greater than the diameter R2 of the arc surface section two (15); the arc surface section one (14) and the arc surface section two (15) and the arc surface section two (15) and the straight surface section (16) are respectively connected through the circular arc one (17) and the circular arc two (18) which protrude towards the axial center line L1 side.

Images