Sinking pipe joint cable connection device and method

Abstract

The application discloses a kind of cable connection device and method for immersed tube pipe section, belong to immersed tunnel construction technical field.The device includes connecting sleeve, torque transmission element, positioning support assembly and corresponding pre-tightening force exerting assembly arranged at both ends of connecting sleeve.Torque transmission element is arranged at the outer wall of connecting sleeve;Positioning support assembly supports connecting sleeve, so that its axis is coaxial with strand bundle.Pre-tightening force exerting assembly includes sliding positioning unit, pre-tightening backrest, pre-tightening execution unit and anti-rotation unit.The guide rod of sliding positioning unit is arranged in sliding hole, so that sliding positioning plate slides along guide rod;Pre-tightening backrest is threadedly connected to strand sleeve at one end, and abuts against sliding positioning plate at the other end;Pre-tightening execution unit exerts pre-tightening force;Anti-rotation unit separates strands and limits their circumferential distortion.The cable connection device and method for immersed tube pipe section provided by the application can accurately coaxially connect strand bundle and connecting sleeve, and improve the stability and precision of immersed tube pipe section cable connection.

Description

Technical Field

[0001] This invention belongs to the field of immersed tunnel construction technology, and particularly relates to a cable connection device and method for immersed tunnel sections. Background Technology

[0002] In the construction of immersed tunnels, PC cable connection is a crucial step in achieving the jointing of tunnel sections. Its connection accuracy and stability directly affect the watertightness and structural safety of the immersed tunnel joint. Current technologies often use direct screwing of connecting sleeves to connect steel strand bundles, but this method has several drawbacks: First, the connecting sleeve is prone to displacement during connection, leading to a loss of preload and reduced connection efficiency; second, the steel strand bundles are prone to twisting along the torque direction when the sleeve is screwed in, which does not meet construction specifications and affects the cable's load-bearing capacity; third, the concentricity of the steel strand bundles is difficult to guarantee, affecting the accuracy of subsequent immersed tunnel section connection.

[0003] For example, the connection method for steel cables used in pipe section joints disclosed in patent CN1268818C achieves tensile constraint of the cables, but does not solve the problems of sleeve displacement and steel strand twisting during the connection process. Therefore, there is an urgent need for a cable connection device and method that is suitable for the installation and connection of immersed pipe sections and can ensure the concentricity and stability of the connection. Summary of the Invention

[0004] In view of the shortcomings of the related technologies, the purpose of this invention is to provide a cable connection device and method for immersed tunnel sections, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cable connection device for immersed tunnel sections includes a connecting sleeve for connecting steel strand bundles, and further includes:

[0007] Torque transmission component, which is fixedly connected to the outer wall of the connecting sleeve, is used to transmit the turning torque to the connecting sleeve through an external force-applying tool.

[0008] The positioning support assembly includes a support frame and an arc-shaped rod disposed on the support frame. The curvature of the arc-shaped rod matches the curvature of the outer wall of the connecting sleeve to position and support the connecting sleeve, so that the axis of the connecting sleeve is coaxial with the axis of the steel strand bundle.

[0009] A preload application assembly is provided at each end of the connecting sleeve, and each set of preload application assemblies includes:

[0010] The sliding positioning unit includes a first sliding positioning plate, a second sliding positioning plate, and a guide rod; the first and second sliding positioning plates are respectively provided with sliding holes in the same direction as the axis of the steel strand bundle, and the guide rod passes through the sliding holes so that the first and second sliding positioning plates slide along the guide rod;

[0011] The pre-tightened backrest has one end threadedly connected to the steel strand sleeve that accommodates the steel strand bundle, and the other end abutting against the first sliding positioning plate, serving as the backrest force point for the first sliding positioning plate to bear the pre-tightening force.

[0012] The pre-tightening actuator includes a jack, which is located between the first sliding positioning plate and the second sliding positioning plate to apply opposing forces to the first sliding positioning plate and the second sliding positioning plate, thereby applying a pre-tightening force to the steel strand bundle.

[0013] The anti-rotation unit includes multiple limiting steel bars, which are fixedly connected to at least one of the first sliding positioning plate and the second sliding positioning plate on the side facing the steel strand bundle, and are correspondingly arranged in the gaps between multiple steel strands in the steel strand bundle to separate each steel strand and limit the circumferential twisting of the steel strand bundle.

[0014] In some embodiments, the anti-rotation unit further includes multiple round steel bars and multiple steel pipes; the multiple round steel bars are respectively fixedly connected to the first sliding positioning plate and the second sliding positioning plate, and are respectively arranged circumferentially along the first sliding positioning plate and the second sliding positioning plate; the multiple steel pipes are detachably inserted into the multiple round steel bars in a one-to-one correspondence, and the free end of each steel pipe is in close contact with the surface of the immersed tube section to limit the circumferential rotation of the pre-tightening force application component.

[0015] In some embodiments, the support frame includes a bottom bearing frame and a plurality of telescopic support legs disposed on the bottom bearing frame. The end of the telescopic support leg away from the bottom bearing frame is connected to an arc-shaped rod. The telescopic support leg is used to adjust the telescopic length to adjust the level of the arc-shaped rod so that the axis of the connecting sleeve is coaxial with the axis of the steel strand bundle.

[0016] In some embodiments, the pre-tightening execution unit further includes a jack support plate; the jack support plate is fixedly connected to the side of the first sliding positioning plate facing the second sliding positioning plate and the side of the second sliding positioning plate facing the first sliding positioning plate; the jack support plate is used to support the jack.

[0017] In some embodiments, the sliding positioning unit further includes ear plates and connecting bolts; the first sliding positioning plate and the second sliding positioning plate are both groove-shaped, the ear plates are respectively fixed to the protruding ends of the grooves of the first sliding positioning plate and the second sliding positioning plate, and the connecting bolts pass through the two ear plates on the same sliding positioning plate to close its grooves and not affect the sliding movement of the first sliding positioning plate and the second sliding positioning plate along the guide rod.

[0018] In some embodiments, the sliding positioning unit has five guide rods; the five guide rods are respectively inserted through the sliding holes and are arranged at intervals along the circumference of the first sliding positioning plate and the second sliding positioning plate.

[0019] A method for connecting immersed tunnel sections with cables, employing the aforementioned cable connection device for immersed tunnel sections, includes the following steps:

[0020] S1, Torque transmission component assembly

[0021] A torque transmission component is fixedly connected to the outer wall of the connecting sleeve to transmit the turning torque to the connecting sleeve through an external force application tool;

[0022] S2, Pre-tensioning backrest assembly

[0023] Connect one end of the pre-tightening backrest to the steel strand sleeve that accommodates the steel strand bundle by threading to complete the pre-assembly of the pre-tightening backrest.

[0024] S3, Connecting sleeve positioning support and pre-tightening

[0025] S31. Set up the positioning support assembly, place the connecting sleeve on the arc-shaped rod, and adjust the height of the support frame so that the inner wall of the arc-shaped rod is in close contact with the outer wall of the connecting sleeve, and the axis of the connecting sleeve is coaxial with the axis of the steel strand bundle to be connected.

[0026] S32. Pre-tighten the front end of the steel strand bundle to the connecting sleeve to complete the initial connection;

[0027] S4, Preload application component assembly

[0028] A set of preload application components is installed at each end of the corresponding connecting sleeve. The assembly steps for each set of preload application components are as follows:

[0029] S41. Sliding positioning unit assembly: The first sliding positioning plate and the second sliding positioning plate are adapted and installed on the outside of the steel strand bundle. The guide rod is passed through the sliding hole so that the first sliding positioning plate and the second sliding positioning plate slide along the guide rod, and the first sliding positioning plate abuts against the pre-installed pre-tightening backrest.

[0030] S42. Pre-tightening actuator layout and pre-tightening force application: Place the jack between the first sliding positioning plate and the second sliding positioning plate, start the jack to apply opposing forces to the first sliding positioning plate and the second sliding positioning plate, and apply a preset pre-tightening force to the steel strand bundle with the help of the reverse support of the pre-tightening backing piece, so that the steel strand bundle is initially tensioned.

[0031] S5, steel strand harness connection

[0032] The connecting sleeve is driven to rotate by an external force-applying tool connected to the torque transmission component until the steel strand bundle maintains the preset tension and the front end thread is screwed into the connecting sleeve, thus completing the docking of the steel strand bundle and the connecting sleeve.

[0033] In some embodiments, before the assembly step of the S4 pre-tightening force application component, at least one of the first sliding positioning plate and the second sliding positioning plate is fixedly connected to a plurality of limiting steel bars on the side facing the steel strand bundle. When the first sliding positioning plate and the second sliding positioning plate are adapted and installed on the outside of the steel strand bundle, each limiting steel bar is correspondingly embedded in the gap between the multiple steel strands in the steel strand bundle to separate the steel strands and limit the circumferential twisting of the steel strand bundle.

[0034] In some embodiments, before the assembly step of the pre-tightening force application component in step S4, multiple round steel bars are fixedly connected circumferentially along the first sliding positioning plate and the second sliding positioning plate. Before the steel strand bundle docking step in step S5, steel pipes are inserted into the round steel bars so that the free ends of each steel pipe are in close contact with the surface of the immersed tube section to restrict the circumferential rotation of the pre-tightening force application component.

[0035] In some embodiments, the cable connection method for immersed tunnel sections further includes the S6 device removal and transfer step: the pre-tightening actuator, the sliding positioning unit and the positioning support assembly are removed sequentially in the reverse assembly process and transferred to the next area to be connected for reuse.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. The cable connection device for immersed tube sections provided by the present invention ensures coaxial connection between the connecting sleeve and the steel strand bundle through the positioning support component, and enables convenient screwing of the sleeve through the torque transmission component; the pre-tightening back support provides stable reverse support for pre-tightening, and the sliding positioning unit ensures smooth sliding of the sliding positioning plate; the anti-rotation unit can separate the steel strands and limit their circumferential twisting. The overall structure is adapted to the immersed tube construction scenario, greatly improving the stability and docking accuracy of the cable connection and reducing the risk of strand kinking.

[0038] 2. The cable connection method for immersed tunnel sections provided by this invention adopts a process sequence of first pre-installing and pre-tightening backing components, then pre-tightening the front end threads of the steel strand bundle and the connecting sleeve, and finally assembling the sliding positioning plate, which effectively avoids assembly interference; it simultaneously integrates coaxial positioning, anti-torsion limiting and precise pre-tightening processes, which not only ensures the docking accuracy of the steel strand bundle and the connecting sleeve, but also simplifies the construction steps, can quickly complete the cable connection, and improve the efficiency and standardization of immersed tunnel section cable construction. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0040] Figure 1 This is a flowchart illustrating an embodiment of the cable connection device and method for immersed tunnel sections according to the present invention.

[0041] Figure 2 This is a schematic diagram of the assembly structure of the connecting sleeve and torque transmission component in one embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0042] Figure 3 This is a side view of the positioning support component supporting the connecting sleeve in one embodiment of the cable connection device and method for immersed tube sections of the present invention.

[0043] Figure 4 This is a front view of the positioning support component supporting the connecting sleeve in one embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0044] Figure 5 This is a schematic diagram of the torque transmission component connected to a hand-operated hoist chain in operation, according to an embodiment of the cable connection device and method for immersed tube sections of the present invention.

[0045] Figure 6 This is a schematic diagram of the working state of the external force-applying steel pipe of the torque transmission component in an embodiment of the cable connection device and method for immersed tube sections of the present invention.

[0046] Figure 7 This is a side view of the preload application component of an embodiment of the cable connection device and method for immersed tunnel sections of the present invention;

[0047] Figure 8 This is a front view of the preload application component of an embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0048] Figure 9 This is a schematic diagram of the arrangement structure of the limiting steel bar and steel strand bundle in one embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0049] Figure 10 This is a schematic diagram of the ear plate and connecting bolt structure of an embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0050] Figure 11 This is a schematic diagram of the installation structure of the round steel and steel pipe in the anti-rotation unit of an embodiment of the cable connection device and method for immersed tube sections of the present invention;

[0051] Figure 12 This is a schematic diagram of the overall assembly structure of the immersed tunnel section and the cable connection device according to an embodiment of the immersed tunnel section cable connection device and method of the present invention.

[0052] Figure 13 for Figure 12 Enlarged structural diagram at point A in the middle;

[0053] Figure 14 This is a schematic diagram showing the completion of the connection between the steel strand bundle and the connecting sleeve in one embodiment of the cable connection device and method for immersed tube sections of the present invention.

[0054] In the picture:

[0055] 1. Connecting sleeve; 11. Torque transmission component; 2. Positioning support assembly; 21. Support frame; 211. Bottom bearing frame; 212. Telescopic support leg; 22. Arc-shaped rod; 3. Pre-tightening force application assembly; 311. First sliding positioning plate; 312. Second sliding positioning plate; 313. Guide rod; 314. Sliding hole; 315. Ear plate; 316. Connecting bolt; 32. Pre-tightening backrest; 33. Pre-tightening execution unit; 331. Jack; 332. Jack support plate; 34. Anti-rotation unit; 341. Limiting steel bar; 342. Round steel; 343. Steel pipe; 4. Steel strand bundle; 41. Steel strand sleeve; 42. Front end thread; 5. Sinking pipe section; 61. Hand chain hoist chain; 62. Force-applying steel pipe. Detailed Implementation

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0057] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Example 1:

[0060] See appendix Figures 2 to 14 This paper presents an illustrative embodiment of the cable connection device for immersed tunnel sections proposed in this invention. The cable connection device for immersed tunnel sections includes a connecting sleeve 1 for connecting steel strand bundles 4, a torque transmission component 11, a positioning support component 2, and a preload application component 3.

[0061] See appendix Figures 2 to 4 The torque transmission component 11 is fixedly connected to the outer wall of the connecting sleeve 1. The torque transmission component 11 is used to transmit the turning torque to the connecting sleeve 1 via an external force-applying tool. The positioning support assembly 2 includes a support frame 21 and an arc-shaped rod 22 disposed on the support frame 21. The curvature of the arc-shaped rod 22 matches the curvature of the outer wall of the connecting sleeve 1 to position and support the connecting sleeve 1, so that the axis of the connecting sleeve 1 is coaxial with the axis of the steel strand bundle 4.

[0062] In this embodiment, the torque transmission component 11 is a torsion ring made of round steel, welded to the outer wall of the connecting sleeve 1. The force application tool can be a hand-operated hoist or a lever, screwed in along the normal direction. When a hand-operated hoist is selected as the force application tool, see Appendix. Figure 5 This diagram illustrates the working state of the external hand chain hoist chain 61 connected to the torque transmission component 11 in this embodiment. The arrows in the diagram indicate the direction of force application on the hand chain hoist chain 61. When the force application tool is selected as a lever, please refer to the appendix. Figure 6This is a schematic diagram of the working state of the external force-applying steel pipe 62 connected to the torque transmission component 11 in this embodiment. The arrow in the figure indicates the direction of force application of the force-applying steel pipe 62. In order to ensure a firm connection, the force-applying steel pipe 62 is welded to the torque transmission component 11. The connecting sleeve 1 is symmetrically screwed in using a hand-operated hoist or a lever until the steel strand is taut and tense. The screwing in of the connecting sleeve 1 is then complete.

[0063] See appendix Figures 12 to 13 Each set of pretensioning force application components 3 is provided at each end of the connecting sleeve 1. Each set of pretensioning force application components 3 includes a sliding positioning unit, a pretensioning backrest 32, a pretensioning execution unit 33, and an anti-rotation unit 34.

[0064] See appendix Figure 7 The sliding positioning unit includes a first sliding positioning plate 311, a second sliding positioning plate 312, and a guide rod 313. The first sliding positioning plate 311 and the second sliding positioning plate 312 are respectively provided with sliding holes 314 in the same direction as the axis of the steel strand bundle 4. The guide rod 313 passes through the sliding holes 314 so that the first sliding positioning plate 311 and the second sliding positioning plate 312 slide along the guide rod 313.

[0065] See appendix Figure 7 and Figure 13 One end of the pre-tightened backrest 32 is threadedly connected to the steel strand sleeve 41 that accommodates the steel strand bundle 4, and the other end abuts against the first sliding positioning plate 311 to serve as the backrest force point for the first sliding positioning plate 311 to bear the pre-tightening force.

[0066] See appendix Figure 6 and Figure 7 The pre-tightening execution unit 33 includes a jack 331, which is located between the first sliding positioning plate 311 and the second sliding positioning plate 312 to apply opposing forces to the first sliding positioning plate 311 and the second sliding positioning plate 312, thereby applying a pre-tightening force to the steel strand bundle 4 to keep the steel strands concentric and straight.

[0067] See appendix Figure 8 and Figure 9 The anti-rotation unit 34 includes multiple limiting steel bars 341 to prevent the steel strand bundle 4 from rotating in the torque direction. The multiple limiting steel bars 341 are fixedly connected to at least one of the first sliding positioning plate 311 and the second sliding positioning plate 312 on the side facing the steel strand bundle 4, and are correspondingly arranged in the gaps between multiple steel strands in the steel strand bundle 4 to separate the individual steel strands and limit the circumferential twisting of the steel strand bundle 4. In this embodiment, the fixed position and size of each limiting steel bar 341 can be adaptively installed according to the gaps between the multiple steel strands.

[0068] See appendix Figure 11The anti-rotation unit 34 also includes multiple round steel bars 342 and multiple steel pipes 343; the multiple round steel bars 342 are respectively fixedly connected to the first sliding positioning plate 311 and the second sliding positioning plate 312, and are respectively arranged circumferentially along the first sliding positioning plate 311 and the second sliding positioning plate 312; the multiple steel pipes 343 are detachably inserted into the multiple round steel bars 342 in a one-to-one correspondence, and the free end of each steel pipe 343 is in close contact with the surface of the immersed tube section 5 to limit the circumferential rotation of the pre-tightening force application component 3, especially when the connecting sleeve 1 is screwed in.

[0069] See appendix Figure 3 and Figure 4 The support frame 21 includes a bottom bearing frame 211 and multiple telescopic support legs 212 disposed on the bottom bearing frame 211. The end of each telescopic support leg 212 away from the bottom bearing frame 211 is connected to an arc-shaped member 22. The telescopic support leg 212 is used to adjust the telescopic length to adjust the levelness of the arc-shaped member 22, ensuring that the axis of the connecting sleeve 1 is coaxial with the axis of the steel strand bundle 4. In this embodiment, the members constituting the support frame 21 can be connected by welding or bolting to improve the stability of the support frame 21. The arc-shaped member 22 is bolted or hinged to one end of the telescopic support leg 212 to maintain the coaxiality of the axis of the connecting sleeve 1 with the axis of the steel strand bundle 4 when the telescopic support leg 212 adjusts its telescopic length. The positioning support assembly 2 ensures that the connecting sleeve 1 is concentric with the steel strand bundle 4 on it and prevents the connecting sleeve 1 from being displaced during subsequent tightening.

[0070] See appendix Figure 7 and Figure 8 The pre-tightening execution unit 33 also includes a jack support plate 332; the jack support plate 332 is fixedly connected to the side of the first sliding positioning plate 311 facing the second sliding positioning plate 312 and the side of the second sliding positioning plate 312 facing the first sliding positioning plate 311; the jack support plate 332 is used to support the jack 331 and prevent the jack 331 from falling.

[0071] See appendix Figures 7 to 10 The sliding positioning unit also includes ear plates 315 and connecting bolts 316. Both the first sliding positioning plate 311 and the second sliding positioning plate 312 are groove-shaped. The ear plates 315 are respectively fixed to the protruding ends of the grooves of the first sliding positioning plate 311 and the second sliding positioning plate 312. The connecting bolts 316 pass through both ear plates 315 on the same sliding positioning plate to close its groove, thus strengthening its overall integrity and not affecting the sliding movement of the first sliding positioning plate 311 and the second sliding positioning plate 312 along the guide rod 313. After the sliding positioning unit is installed, the steel strand bundle 4 and the connecting bolts 316 can be connected by nylon ropes to adjust the elevation of the first sliding positioning plate 311 and the second sliding positioning plate 312, facilitating alignment and adjustment.

[0072] See appendix Figure 7 and Figure 8 In the sliding positioning unit, there are five guide rods 313, and the first sliding positioning plate 311 and the second sliding positioning plate 312 are respectively provided with five sliding holes 314, which are spaced apart along the circumference of the first sliding positioning plate 311 and the second sliding positioning plate 312. The five guide rods 313 are inserted one-to-one through the sliding holes 314. In some embodiments, a thickened sleeve is also provided at the sliding hole 314. The thickened sleeve can increase the contact surface between the guide rod 313 and the sliding positioning plate, making the alignment of the axes of the first sliding positioning plate 311 and the second sliding positioning plate 312 more accurate, and forming a directional support when the jack 331 extends.

[0073] In the above illustrative embodiments, the cable connection device for the immersed tube section ensures coaxial connection between the connecting sleeve and the steel strand bundle through the positioning support component, and the torque transmission component enables convenient screwing of the sleeve; the pre-tightening back support provides stable reverse support for pre-tightening, and the sliding positioning unit ensures smooth sliding of the sliding positioning plate; the anti-rotation unit can separate the steel strands and limit their circumferential twisting. The overall structure is adapted to the immersed tube construction scenario, greatly improving the stability and docking accuracy of the cable connection and reducing the risk of strand kinking.

[0074] Example 2:

[0075] See appendix Figures 1 to 14 This paper provides an illustrative embodiment of the cable connection method for immersed tunnel sections proposed in this invention. The cable connection device for immersed tunnel sections from Embodiment 1 is used. The cable connection method for immersed tunnel sections includes the following steps:

[0076] S1, Torque Transmission Component 11 Assembly

[0077] A torque transmission component 11 is fixedly connected to the outer wall of the connecting sleeve 1 so as to transmit the turning torque to the connecting sleeve 1 through an external force application tool;

[0078] S2, Pre-tensioning backrest component 32 pre-installed

[0079] One end of the pre-tightening backrest 32 is threaded to the steel strand sleeve 41 that accommodates the steel strand bundle 4, thus completing the pre-assembly of the pre-tightening backrest 32.

[0080] S3, Positioning support and pre-tightening of connecting sleeve 1

[0081] S31. Set up the positioning support assembly 2, place the connecting sleeve 1 on the arc-shaped rod 22, adjust the height of the support frame 21 so that the inner wall of the arc-shaped rod 22 is in close contact with the outer wall of the connecting sleeve 1, and the axis of the connecting sleeve 1 is coaxial with the axis of the steel strand bundle 4 to be connected.

[0082] S32. Pre-tighten the front end 42 of the steel strand bundle 4 to the connecting sleeve 1 to complete the initial connection;

[0083] S4, Preload application component 3 assembly

[0084] A set of preload application components 3 is installed at each end of the corresponding connecting sleeve 1. The assembly steps for each set of preload application components 3 are as follows:

[0085] S41. Sliding positioning unit assembly: The first sliding positioning plate 311 and the second sliding positioning plate 312 are adapted and installed on the outside of the steel strand bundle 4. The guide rod 313 is passed through the sliding hole 314 so that the first sliding positioning plate 311 and the second sliding positioning plate 312 slide along the guide rod 313, and the first sliding positioning plate 311 abuts against the pre-installed pre-tightening backrest 32.

[0086] S42. Pre-tightening execution unit 33 arrangement and pre-tightening force application: Place jack 331 between the first sliding positioning plate 311 and the second sliding positioning plate 312, start jack 331 to apply opposing forces to the first sliding positioning plate 311 and the second sliding positioning plate 312, and apply a preset pre-tightening force to the steel strand bundle 4 with the reverse support of the pre-tightening backrest 32, so that the steel strand bundle 4 is initially tensioned;

[0087] S5, steel stranded wire harness 4-pronged connection

[0088] The connecting sleeve 1 is driven to rotate by the external force application tool of the torque transmission component 11 until the steel strand bundle 4 is kept in the preset tension state and the front end thread 42 is screwed into the connecting sleeve 1 to complete the final tightening and connection, and the steel strand bundle 4 and the connecting sleeve 1 are connected.

[0089] In step S31, see Appendix Figure 14 When connecting the cables at the top of the immersed tunnel section 5, the positioning support component 2 is placed on the scaffolding erected on site. When connecting the cables at the bottom of the immersed tunnel section 5, the positioning support component 2 is placed directly on the end steel shell of the immersed tunnel section 5.

[0090] In step S31, adjusting the height of the support frame 21 specifically involves adjusting the telescopic length of the telescopic support leg 212 to adjust the levelness of the arc-shaped rod 22, ensuring that the inner wall of the arc-shaped rod 22 fits tightly against the outer wall of the connecting sleeve 1, and that the axis of the connecting sleeve 1 is coaxial with the axis of the steel strand bundle 4 to be connected. When the support frame 21 only requires minor adjustments to its posture, the telescopic support leg 212 can be left unadjusted, and simple methods such as placing pads under the bottom load-bearing frame 211 can be used for minor adjustments.

[0091] Before the assembly step of the S4 pre-tightening force application component 3, at least one of the first sliding positioning plate 311 and the second sliding positioning plate 312 is fixedly connected to a plurality of limiting steel bars 341 on the side facing the steel strand bundle 4. When the first sliding positioning plate 311 and the second sliding positioning plate 312 are adapted and installed on the outside of the steel strand bundle 4, each limiting steel bar 341 is correspondingly embedded in the gap between the multiple steel strands in the steel strand bundle 4 to separate the steel strands and restrict the circumferential twisting of the steel strand bundle 4.

[0092] Before the assembly step of the pre-tightening force application component 3 in step S4, multiple round steel bars 342 are fixedly connected circumferentially along the first sliding positioning plate 311 and the second sliding positioning plate 312. Before the docking step of the steel strand bundle 4 in step S5, steel pipes 343 are inserted into the round steel bars 342 so that the free ends of each steel pipe 343 are in close contact with the surface of the immersed tube section 5 to restrict the circumferential rotation of the pre-tightening force application component 3.

[0093] In this embodiment, both the first sliding positioning plate 311 and the second sliding positioning plate 312 are groove-shaped, with ear plates 315 fixed at both protruding ends of the grooves. In step S41, after assembling the first sliding positioning plate 311, the second sliding positioning plate 312, and the guide rod 313, the connecting bolt 316 passes through the two ear plates 315 on the same sliding positioning plate to close the groove, making it more integral and not affecting the sliding movement of the first sliding positioning plate 311 and the second sliding positioning plate 312 along the guide rod 313. At this time, the steel strand bundle 4 and the connecting bolt 316 can be connected by a nylon rope to adjust the elevation of the first sliding positioning plate 311 and the second sliding positioning plate 312 for easy alignment and adjustment. Then, the pre-tightening execution unit 33 is deployed and the pre-tightening force is applied in step S42.

[0094] In this embodiment, the cable connection method for immersed tunnel sections also includes the S6 device dismantling and transfer step: following the reverse assembly process, the pre-tightening execution unit 33, the sliding positioning unit, and the positioning support assembly 2 are dismantled sequentially and transferred to the next area to be connected for reuse. Specifically, the jack 331 is removed first, then the connecting bolts 316 inside the ear plate 315 are removed (if there is a steel pipe 343, it also needs to be removed at this time), then the assembly of the first sliding positioning plate 311, the second sliding positioning plate 312, and the guide rod 313 is removed (if it is difficult to remove the whole assembly, the guide rod 313 can be removed first, followed by the first sliding positioning plate 311 and the second sliding positioning plate 312), and finally, the positioning support assembly 2 is removed (if it is difficult to remove the whole assembly, the telescopic length of the telescopic support leg 212 can be adjusted first to separate the arc-shaped rod 22 from the connecting sleeve 1, and then the whole assembly can be removed). See Appendix Figure 14 This is a schematic diagram showing the steel strand bundle and connecting sleeve completed after docking in this embodiment, and after the pre-tightening execution unit 33, sliding positioning unit and positioning support component 2 have been removed.

[0095] In the above illustrative embodiments, the cable connection method for immersed tunnel sections adopts a process sequence of first pre-installing and pre-tightening the backing component, then pre-tightening the front end of the steel strand bundle and the connecting sleeve, and finally assembling the sliding positioning plate, which effectively avoids assembly interference; the simultaneous integration of coaxial positioning, anti-torsion limiting and precise pre-tightening processes not only ensures the docking accuracy of the steel strand bundle and the connecting sleeve, but also simplifies the construction steps, can quickly complete the cable connection, and improve the efficiency and standardization of immersed tunnel section cable construction.

[0096] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A cable connection device for immersed tunnel sections, comprising a connecting sleeve (1) for connecting steel strand bundles (4), characterized in that, Also includes: Torque transmission component (11), the torque transmission component (11) is fixedly connected to the outer wall of the connecting sleeve (1), the torque transmission component (11) is used to transmit the turning torque to the connecting sleeve (1) via an external force application tool; The positioning support assembly (2) includes a support frame (21) and an arc-shaped rod (22) disposed on the support frame (21). The curvature of the arc-shaped rod (22) matches the curvature of the outer wall of the connecting sleeve (1) to position and support the connecting sleeve (1), so that the axis of the connecting sleeve (1) is coaxial with the axis of the steel strand bundle (4). A preload application assembly (3) is provided at each end of the connecting sleeve (1), and each set of the preload application assembly (3) includes: The sliding positioning unit includes a first sliding positioning plate (311), a second sliding positioning plate (312), and a guide rod (313); the first sliding positioning plate (311) and the second sliding positioning plate (312) are respectively provided with sliding holes (314) in the same direction as the axis of the steel strand bundle (4), and the guide rod (313) passes through the sliding holes (314) so ​​that the first sliding positioning plate (311) and the second sliding positioning plate (312) slide along the guide rod (313); The pre-tightening backrest (32) has one end threadedly connected to the steel strand sleeve (41) that accommodates the steel strand bundle (4), and the other end abutting against the first sliding positioning plate (311) to serve as the backrest force point for the first sliding positioning plate (311) to bear the pre-tightening force. The pre-tightening execution unit (33) includes a jack (331), which is located between the first sliding positioning plate (311) and the second sliding positioning plate (312) to apply opposing forces to the first sliding positioning plate (311) and the second sliding positioning plate (312), thereby applying a pre-tightening force to the steel strand bundle (4). The anti-rotation unit (34) includes multiple limiting steel bars (341), multiple round steel bars (342), and multiple steel pipes (343). The multiple limiting steel bars (341) are fixedly connected to at least one of the first sliding positioning plate (311) and the second sliding positioning plate (312) on the side facing the steel strand bundle (4), and are correspondingly arranged in the gap between multiple steel strands in the steel strand bundle (4) to separate each steel strand and restrict the circumferential twisting of the steel strand bundle (4).

2. The cable connection device for immersed tunnel sections according to claim 1, characterized in that, Multiple round steel bars (342) are fixedly connected to the first sliding positioning plate (311) and the second sliding positioning plate (312) respectively, and are arranged circumferentially along the first sliding positioning plate (311) and the second sliding positioning plate (312) respectively; multiple steel pipes (343) are detachably inserted into each other in a one-to-one correspondence with multiple round steel bars (342), and the free end of each steel pipe (343) is closely attached to the surface of the immersed tube section (5) to restrict the circumferential rotation of the pre-tightening force application component (3).

3. The cable connection device for immersed tunnel sections according to claim 1, characterized in that, The support frame (21) includes a bottom bearing frame (211) and a plurality of retractable support legs (212) disposed on the bottom bearing frame (211). The end of the retractable support leg (212) away from the bottom bearing frame (211) is connected to the arc-shaped rod (22). The retractable support leg (212) is used to adjust the telescopic length to adjust the level of the arc-shaped rod (22) so that the axis of the connecting sleeve (1) is coaxial with the axis of the steel strand bundle (4).

4. The cable connection device for immersed tunnel sections according to claim 1, characterized in that, The pre-tightening execution unit (33) further includes a jack support plate (332); the jack support plate (332) is fixedly connected to the side of the first sliding positioning plate (311) facing the second sliding positioning plate (312) and the side of the second sliding positioning plate (312) facing the first sliding positioning plate (311); the jack support plate (332) is used to support the jack (331).

5. The cable connection device for immersed tunnel sections according to claim 1, characterized in that, The sliding positioning unit also includes ear plates (315) and connecting bolts (316); the first sliding positioning plate (311) and the second sliding positioning plate (312) are both groove-shaped, and the ear plates (315) are respectively fixed to the protruding ends of the grooves of the first sliding positioning plate (311) and the second sliding positioning plate (312). The connecting bolts (316) pass through the two ear plates (315) on the same sliding positioning plate to close its grooves and not affect the sliding movement of the first sliding positioning plate (311) and the second sliding positioning plate (312) along the guide rod (313).

6. The cable connection device for immersed tunnel sections according to claim 1, characterized in that, In the sliding positioning unit, there are five guide rods (313); the five guide rods (313) are respectively inserted through the sliding holes (314) and are arranged at intervals along the circumference of the first sliding positioning plate (311) and the second sliding positioning plate (312).

7. A method for connecting immersed tunnel sections using cables, characterized in that, The method using the cable connection device for immersed tunnel sections according to any one of claims 1-6 includes the following steps: S1, Torque transmission component (11) assembly A torque transmission component (11) is fixedly connected to the outer wall of the connecting sleeve (1) to transmit the turning torque to the connecting sleeve (1) through an external force application tool; S2, Pre-tensioned backrest (32) pre-installed One end of the pre-tightening backrest (32) is threaded to the steel strand sleeve (41) that accommodates the steel strand bundle (4) to complete the pre-assembly of the pre-tightening backrest (32); S3, Connecting sleeve (1) Positioning support and pre-tightening S31. Set up the positioning support assembly (2), place the connecting sleeve (1) on the arc-shaped rod (22), adjust the height of the support frame (21) so that the inner wall of the arc-shaped rod (22) is closely fitted with the outer wall of the connecting sleeve (1), and the axis of the connecting sleeve (1) is coaxial with the axis of the steel strand bundle (4) to be connected. S32. Pre-tighten the front end (42) of the steel strand bundle (4) to the connecting sleeve (1) to complete the initial connection; S4, Preload application component (3) assembly A set of preload application components (3) is arranged at each end of the connecting sleeve (1), and the assembly steps of each set of preload application components (3) are as follows: S41. Sliding positioning unit assembly: The first sliding positioning plate (311) and the second sliding positioning plate (312) are adapted and installed on the outside of the steel strand bundle (4), and the guide rod (313) is inserted into the sliding hole (314) so ​​that the first sliding positioning plate (311) and the second sliding positioning plate (312) slide along the guide rod (313), and the first sliding positioning plate (311) abuts against the pre-installed pre-tightening backrest (32); S42, Pre-tightening execution unit (33) layout and pre-tightening force application: Place the jack (331) between the first sliding positioning plate (311) and the second sliding positioning plate (312), start the jack (331) to apply opposing forces to the first sliding positioning plate (311) and the second sliding positioning plate (312), and apply a preset pre-tightening force to the steel strand bundle (4) with the reverse support of the pre-tightening backrest (32) to initially tighten the steel strand bundle (4); S5, steel strand bundle (4) butt joint The connecting sleeve (1) is driven to rotate by the external force application tool of the torque transmission component (11) until the steel strand bundle (4) maintains the preset tension state and the front end thread (42) is screwed into the connecting sleeve (1), thus completing the docking of the steel strand bundle (4) and the connecting sleeve (1).

8. The cable connection method for immersed tunnel sections according to claim 7, characterized in that, Before the assembly step of the S4 pre-tightening force application component (3), multiple limiting steel bars (341) are fixedly connected to at least one of the first sliding positioning plate (311) and the second sliding positioning plate (312) on the side facing the steel strand bundle (4). When the first sliding positioning plate (311) and the second sliding positioning plate (312) are adapted and installed on the outside of the steel strand bundle (4), each limiting steel bar (341) is embedded into the gap between multiple steel strands in the steel strand bundle (4) to separate each steel strand and restrict the circumferential twisting of the steel strand bundle (4).

9. The cable connection method for immersed tunnel sections according to claim 7, characterized in that, Before the assembly step of the S4 pre-tightening force application component (3), multiple round steel bars (342) are fixedly connected circumferentially along the first sliding positioning plate (311) and the second sliding positioning plate (312). Before the S5 steel strand bundle (4) docking step, steel pipes (343) are inserted into the round steel bars (342) so that the free ends of each steel pipe (343) are in close contact with the surface of the immersed tube section (5) to restrict the circumferential rotation of the pre-tightening force application component (3).

10. The cable connection method for immersed tunnel sections according to claim 7, characterized in that, It also includes the S6 device removal and transfer steps: remove the pre-tightening actuator (33), sliding positioning unit and positioning support assembly (2) in reverse order of assembly process, and transfer them to the next area to be connected for reuse.

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