Construction method and construction equipment of offshore composite beam

Abstract

The invention discloses a construction method and construction equipment of an offshore composite beam, and belongs to the technical field of bridge construction. The floating fishing equipment is used for hoisting a steel tank beam to a preset position at the top of a pier, hoisting erecting equipment to an inlaying section at the top of the pier, enabling the erecting equipment to be located above the steel tank beam and hoisting a plurality of prefabricated reinforced concrete bridge deck slabs to the steel tank beam. The erecting equipment is used for hoisting and laying a plurality of prefabricated reinforced concrete bridge deck slabs to designated positions on the steel channel beams; the floating fishing equipment comprises a floating fishing boat and a lifting sling, the erecting equipment comprises a truss type main beam, a plurality of supporting leg assemblies and a multi-crown-block sliding assembly are arranged on the truss type main beam, the supporting leg assemblies are arranged in an inlaying section at the top of a pier, and a plurality of steel cable tying assemblies which are evenly distributed are further arranged on the truss type main beam. According to the technical scheme, the problems of manufacturing, transporting and erecting construction of the offshore composite beam are solved, and the construction uncertainty and the construction cost are remarkably reduced.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to a construction method and equipment for marine composite beams. Background Technology

[0002] Long-span composite beam structures are core load-bearing components in cross-sea bridge engineering, typically composed of steel channel beams and concrete bridge decks connected by shear keys. These structures combine the lightweight and high strength of steel structures with the compressive durability of concrete structures, and are widely used in bridge construction with main spans exceeding 60-70 meters. In recent years, with the rapid development of global cross-sea passage projects (such as the Hong Kong-Zhuhai-Macau Bridge and the Shenzhen-Zhongshan Bridge), the span requirements for composite beams have exceeded 80 meters, with single beam segments weighing over 2000 tons, posing challenges to erection technology.

[0003] Due to the large span and self-weight of the composite beam bridge at sea, there are certain limitations to the use of traditional erection techniques. For example, the use of large floating cranes requires the use of floating cranes of 3,000 tons or more to lift the precast composite beams as a whole. However, there are very few floating cranes in the world that meet the requirements, and the daily rental fee is as high as hundreds of thousands of yuan, which leads to a surge in construction costs and makes it very easy to cause serious losses due to poor floating crane scheduling. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a construction method and equipment for marine composite beams, so as to solve the problems of marine composite beam fabrication, transportation and erection, and significantly reduce construction uncertainty and construction cost.

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

[0006] The present invention provides a construction device for a marine composite beam, comprising a float-fishing device and an erection device. The float-fishing device is used to hoist a steel channel beam to a preset position on the top of a bridge pier, and to hoist the erection device to the interlocking section on the top of the bridge pier so that the erection device is positioned above the steel channel beam. The device is also used to hoist several precast reinforced concrete bridge panels onto the steel channel beam. The erection device is used to hoist and lay several precast reinforced concrete bridge panels onto designated positions on the steel channel beam.

[0007] The float fishing equipment includes a float fishing boat and a lifting device. The erection equipment includes a truss-type main beam. The truss-type main beam is provided with several support leg assemblies and multiple crane sliding assemblies. The support leg assemblies are set in the interlocking section at the top of the pier. The truss-type main beam is also provided with several evenly distributed steel cable tie assemblies. The steel cable tie assemblies are used to stably connect the erection equipment to the steel channel beam.

[0008] Furthermore, the support leg assembly includes a vertical support leg, a support bracket, and several stabilizing rods. The support bracket is fixed to the truss-type main beam, one end of the vertical support leg is vertically fixed to the support bracket, and the two ends of the several stabilizing rods are respectively inclinedly connected to the bottom surface of the support bracket and the side surface of the vertical support leg.

[0009] Furthermore, the multi-crane sliding assembly includes a sliding crane beam, a first sliding crane, and a second sliding crane. The sliding crane beam is fixed to the truss main beam, and the first and second sliding cranes are slidably connected to the sliding crane beam. Both the first and second sliding cranes are equipped with hooks.

[0010] Furthermore, the cable tie assembly includes a hydraulic jack, a vertical anchor cable, and a cable limiting element. The hydraulic jack is fixed to the truss-type main beam. One end of the vertical anchor cable is connected to the movable end of the hydraulic jack, and the other end of the vertical anchor cable passes through the steel channel beam. The cable limiting element is located on the other end of the vertical anchor cable to prevent the end of the vertical anchor cable from vertically separating from the steel channel beam.

[0011] Furthermore, the cable limiting element includes a mounting ball. The mounting ball has a through-groove along its horizontal inner circumference, and an mounting groove on its outer side. The mounting ball also has a through-groove along its vertical inner circumference, with several mounting channels on its outer circumference. These mounting channels communicate with the mounting groove. A slider is located within the groove. A fixing plate is located at one end of the mounting groove near the center of the mounting ball. A spring is located between the fixing plate and the slider, with both ends of the spring fixedly connected to the slider and the fixing plate, respectively. A traction rope is located within the mounting channels. One end of the traction rope is fixed to the slider, and the other end is located outside the mounting ball and detachably connected to a vertical anchor cable. A stop is located at the end of the vertical anchor cable, which is situated within the vertical groove.

[0012] Furthermore, the upper end of the mounting sphere is provided with a sleeve, which is sleeved on the vertical anchor cable. A nut is provided on the outer surface of the sleeve, and a rotating block is provided on the outside of the nut. The rotating block is rotatably connected to the nut, and the other end of several traction ropes is fixedly connected to the rotating block.

[0013] Furthermore, a limiting block is provided on one end of the slider near the center of the mounting ball. The limiting block is fixed on the slider and is located in the mounting groove.

[0014] A construction method for a marine composite beam includes the following construction steps:

[0015] S1. Transport the steel channel beam to the construction sea area;

[0016] S2. Use a floating crane to lift the steel channel beam to the preset position on the top of the bridge pier;

[0017] S3. Use a floating crane to erect the equipment to the top of the bridge pier for the patching section.

[0018] S4. The steel channel beam is connected and reinforced to the erection equipment through a steel cable tying system;

[0019] S5. Use a floating crane to lift the precast reinforced concrete bridge deck onto the steel channel beam;

[0020] S6. Start the sliding crane system above the main beam of the erection equipment and lift the precast reinforced concrete bridge deck to a suspended state using the hook;

[0021] S7. Fine-tune the position of the gantry crane in the sliding gantry crane system so that the precast reinforced concrete bridge surface is aligned and then lowered and fixed.

[0022] S8. Repeat S6-S7 until the bridge deck construction is completed.

[0023] Furthermore, step S4 includes the following construction steps:

[0024] S41. Vertical anchor cables are placed downwards from the upper end of the I-beam at the bottom of the truss main beam through the reserved holes;

[0025] S42. The vertical anchor cable passes downward through the pre-reserved hole at the bottom of the steel channel beam, and then through the steel cable limiting element;

[0026] S43. Vertical anchor cables are limited and fixed by steel cable limiting elements;

[0027] S44. The upper part of the vertical steel cable is tied and fixed by hydraulic jacks to complete the connection and reinforcement between the steel channel beam and the erection equipment.

[0028] The beneficial effects of this invention are as follows:

[0029] (1) Significant economic benefits: The marine composite beam construction method and equipment proposed in this invention can complete the construction tasks that could only be completed by large floating cranes in the past by using general floating cranes and special erection equipment in coordination, effectively reducing equipment costs.

[0030] (2) Saves construction time; generally, there are a large number of floating cranes, and the scheduling is controllable. The steel channel beams and bridge decks can be erected simultaneously, and multiple working faces can be set up to ensure continuous construction of the steel channel beams and bridge decks, significantly reducing construction uncertainty and thus improving work efficiency.

[0031] (3) Green construction and sustainable development; it can significantly reduce carbon emissions. The energy consumption of a typical floating crane is only 1 / 3 that of a large floating crane, which is in line with the trend of low-carbon construction. The erection equipment can be disassembled and transported and reused in different projects, reducing resource waste.

[0032] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0033] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0034] Figure 1 This is a top view of the composite beam structure of the present invention;

[0035] Figure 2 This is a schematic cross-sectional view of the composite beam of the present invention;

[0036] Figure 3 This is a schematic diagram of the steel channel beam erected along the longitudinal direction of the bridge according to the present invention;

[0037] Figure 4 This is a schematic diagram of the transverse bridge structure of the steel channel beam erected according to the present invention;

[0038] Figure 5 This is a schematic diagram of the longitudinal structure of the hoisting and erection equipment of the present invention along the bridge direction;

[0039] Figure 6 This is a schematic diagram of the hoisting and erection equipment of the present invention along the transverse bridge direction;

[0040] Figure 7 This is a schematic diagram of the transverse bridge structure during operation after the equipment of this invention is in place.

[0041] Figure 8 For the present invention Figure 7 Enlarged view of point A;

[0042] Figure 9 This is a schematic diagram of the longitudinal bridge structure during operation after the equipment of the present invention has been installed.

[0043] Figure 10 For the present invention Figure 9 Enlarged view of point B;

[0044] Figure 11 This is a three-dimensional schematic diagram of the cable limiting element in this invention;

[0045] Figure 12 This is a schematic cross-sectional view of the steel cable limiting element acting on the steel channel beam in this invention;

[0046] Figure 13 This is a three-dimensional schematic diagram of the internal components of the cable limiting element in this invention;

[0047] Figure 14 This is a schematic cross-sectional view of the mounting ball of the steel cable limiting element of the present invention.

[0048] The following labels are shown in the attached diagram:

[0049] 1. Precast reinforced concrete bridge deck; 2. Post-cast concrete strips; 3. Steel channel beams; 4. Floating crane equipment; 5. Lifting and hoisting tools; 6. Cable tie system; 7. Piers; 8. Vibration damping bearings; 9. Erection equipment; 61. Hydraulic jacks; 62. Vertical anchor cables; 63. Cable limiting elements; 6310. Mounting spheres; 6311. Vertical through slots; 6312. Slides; 6313. Mounting slots; 6314. Mounting channels; 6315. Sliding blocks; 6316. Limiting block; 6317, Spring; 6318, Fixing plate; 6319, Traction rope; 6320, Stop block; 6321, Sleeve; 6322, Nut; 6323, Rotating block; 91, Truss main beam; 92, Support leg assembly; 93, Multi-crane sliding assembly; 921, Vertical support leg; 922, Support bearing; 923, Stabilizing tie rod; 931, Sliding crane beam; 932, First sliding crane; 933, Second sliding crane; 934, Hook. Detailed Implementation

[0050] like Figures 1 to 14 As shown, a construction device for a marine composite beam includes a float-fishing device and an erection device 9. The float-fishing device is used to hoist the steel channel beam 3 to a preset position on the top of the pier 7, and to hoist the erection device 9 to the interlocking section on the top of the pier 7 so that the erection device 9 is located above the steel channel beam 3. The device also hoists a number of precast reinforced concrete bridge deck panels 1 onto the steel channel beam 3. The erection device 9 is used to hoist and lay the number of precast reinforced concrete bridge deck panels 1 onto the designated position on the steel channel beam 3.

[0051] The float fishing equipment includes a float fishing boat and a lifting device 5 (a boom or frame in the prior art). The erection equipment 9 includes a truss main beam 91. The truss main beam 91 is provided with several support leg assemblies 92 and multiple crane sliding assemblies 93. The support leg assemblies 92 are set in the interlocking section at the top of the pier 7. The truss main beam 91 is also provided with several evenly distributed steel cable tie assemblies. The steel cable tie assemblies are used to stably connect the erection equipment 9 to the steel channel beam 3.

[0052] The construction principle of this technical solution is as follows:

[0053] Using float-fishing equipment (existing technology), the steel channel beam 3 is first hoisted and placed on the pre-set shock-absorbing support 8 on the pier 7. Then, the erection equipment 9 is hoisted above the steel channel beam 3, so that the support and backing components of the erection equipment 9 are also placed on the interlocking section at the top of the bridge end (within the gap between adjacent steel channel beams 3). Then, the truss-type main beam 91 of the erection equipment 9 is effectively connected to the steel channel beam 3 through the steel cable tie assembly. This improves the stability of the erection equipment 9 and reduces the deflection of the steel channel beam 3 due to its own weight, thereby improving the overall safety. Finally, several reinforced concrete bridge panels are hoisted onto the steel channel beam 3 using float-fishing equipment. Then, the reinforced concrete bridge panels are hoisted using the multi-crane sliding assembly 93 set on the erection equipment 9. After that, the post-concrete strip 2 can be poured, thus realizing the assembly construction between the steel channel beam 3 and the concrete channel beam 3.

[0054] The advantages of the above technical solution are that it solves the problems of fabrication, transportation and erection of marine composite beams, the technology is simple, it significantly reduces construction uncertainty, it does not require the erection of large prefabrication sites at wharves, nor does it require large floating cranes, and it can complete the construction tasks that previously could only be completed by large floating cranes, effectively reducing construction costs.

[0055] In one feasible embodiment, the support leg assembly 92 includes a vertical support leg 921, a support bracket 922, and a plurality of stabilizing rods 923. The support bracket 922 is fixed to the truss-type main beam 91, one end of the vertical support leg 921 is vertically fixed to the support bracket 922, and the two ends of the plurality of stabilizing rods 923 are respectively inclinedly connected to the bottom surface of the support bracket 922 and the side surface of the vertical support leg 921 to ensure the stability of the support bracket 922. Preferably, the support leg is height-adjustable, such as a hydraulic leg, which can adjust the levelness of the truss-type main beam 91 and improve the performance.

[0056] In one feasible embodiment, the multi-crane sliding assembly 93 includes a sliding crane beam 931, a first sliding crane 932, and a second sliding crane 933. The sliding crane beam 931 is fixed to the truss-type main beam 91. The first sliding crane 932 and the second sliding crane 933 are slidably connected to the sliding crane beam 931. Both the first sliding crane 932 and the second sliding crane 933 are equipped with hooks 934, which can also be vertically retractable hooks 934, to facilitate the lifting and placement of the precast reinforced concrete bridge deck 1. It is easy to understand that the truss-type main beam 91 is at least a pair of The two main beams 91 are equipped with slide rails. The first sliding trolley 932 and the second sliding trolley 933 are slidably connected to the slide rails. Each of the two first sliding trolleys 932 and the two second sliding trolleys 933 is equipped with a sliding trolley beam 931. The hook 934 is set on the sliding trolley beam 931. The hook 934 can be moved vertically by means of a winch or other controller. The specific structure can be referred to as the overhead crane in the prior art. With this structure, the hook 934 on the erection equipment 9 can lift the precast reinforced concrete bridge deck 1 to the designated position of the steel channel beam 3 for construction.

[0057] In one feasible embodiment, the cable tie assembly includes a hydraulic jack 61, a vertical anchor cable 62, and a cable limiting element 63. The hydraulic jack 61 is fixed to the truss-type main beam 91. One end of the vertical anchor cable 62 is connected to the movable end of the hydraulic jack 61, and the other end of the vertical anchor cable 62 passes through the steel channel beam 3. The cable limiting element 63 (which can be a limiting block 6316 or a sleeper, etc., larger than the diameter of the through hole on the steel channel beam 3) is set on the other end of the vertical anchor cable 62 to prevent the end of the vertical anchor cable 62 from vertically detaching from the steel channel beam 3. Preferably, the steel cable tying system 6 is respectively set at 1 / 2 and 1 / 4 of the truss main beam 91 and the steel channel beam 3. Multiple settings ensure the stability after connection. The connection method is that since the steel cable limiting element 63 limits the end of the vertical anchor cable 62 to the lower surface of the steel channel beam 3, the vertical anchor cable 62 will be tightened by the lifting of the hydraulic jack 61, thereby realizing the connection between the steel channel beam 3 and the erection equipment 9.

[0058] In one feasible embodiment, the cable limiting element 63 includes a mounting ball 6310. The mounting ball 6310 has a through-groove 6312 on its horizontally inner circumference, and a mounting groove 6313 on its outer side. The mounting ball 6310 also has a through-groove 6311 on its vertically inner circumference, and a plurality of mounting channels 6314 on its outer circumference, communicating with the mounting groove 6313. A slider 6315 is provided within the groove 6312, and the mounting groove 6313 is located near the center of the mounting ball 6310. A fixing plate 6318 is provided, and a spring 6317 is provided between the fixing plate 6318 and the slider 6315. The two ends of the spring 6317 are fixedly connected to the slider 6315 and the fixing plate 6318 respectively. A traction rope 6319 is provided in the installation channel 6314. One end of the traction rope 6319 is fixed to the slider 6315, and the other end of the traction rope 6319 is located outside the installation ball 6310. The other end of the traction rope 6319 is detachably connected to the vertical anchor cable 62. The end of the vertical anchor cable 62 is provided with a stop block 6320, and the vertical anchor cable 62 is located in the vertical through groove 6311.

[0059] The working principle of the above technical solution is as follows:

[0060] Because the end of the vertical anchor cable 62 needs to be limited to the lower surface of the steel channel beam 3, the conventional operation is to pass the vertical anchor cable 62 through the pre-set through hole on the steel channel beam 3, then hoist a person to the designated position, and then install the steel cable limiting element 63 on the vertical anchor cable 62. After the construction is completed, the construction personnel need to be lowered to the location to operate and detach the vertical anchor cable 62 and the steel cable limiting element 63. Obviously, it is extremely inconvenient to use.

[0061] In this technical solution, the steel cable limiting component is installed on the end of the vertical anchor cable 62. During use, the steel cable limiting component is simply placed under the lower surface through the through hole in the steel channel beam 3. Then, by releasing the traction rope 6319, the spring 6317 will push the sliders 6315 outwards from the mounting ball 6310 under its reset action. After pushing out, the diameter covered by each slider 6315 is larger than the diameter of the through hole in the steel channel beam 3. Therefore, when the vertical anchor cable 62 is pulled upwards, it acts on the mounting ball 6310. The sliders 6315 extending from the mounting ball 6310 interact with the steel channel beam 3. The lower surface contacts the upper surface, thus blocking the upward movement of the mounting ball 6310 and achieving a taut connection. After construction is completed, simply lower the vertical anchor cable 62 and pull up the traction rope 6319 to retract the slider 6315 into the mounting ball 6310. At this point, the diameter of the mounting ball 6310 is smaller than the diameter of the through hole in the steel channel beam 3, making it easy to remove the end of the vertical anchor cable 62. In this way, construction personnel only need to operate on the upper surface of the steel channel beam 3 to achieve the limiting and disengagement of the end of the vertical anchor cable 62 from the bottom surface of the steel channel beam 3, greatly improving the ease of use.

[0062] In one feasible embodiment, the upper end of the mounting ball 6310 is provided with a sleeve 6321, which is sleeved on the vertical anchor cable 62. A nut 6322 is provided on the outer surface of the sleeve 6321, and a rotating block 6323 is provided on the outer side of the nut 6322. The rotating block 6323 is rotatably connected to the nut 6322, and the other end of a plurality of traction ropes 6319 is fixedly connected to the rotating block 6323. By rotating the nut 6322, the position of the nut 6322 on the sleeve 6321 is controlled, thereby changing the tightening and loosening state of the traction rope 6319. This detachable connection method is simple and reliable, and can be operated with tools such as wrenches. The operation is quick and saves time and effort. The rotating block 6323 is connected to the nut 6322 through bearings or groove protrusions. Furthermore, the sleeve 6321 has the advantage that the vertical movement of the mounting ball 6310 can be restricted by holding the sleeve 6321, which facilitates the retraction operation of the traction rope 6319 on the slider 6315. If the sleeve 6321 is not set, the mounting ball 6310 will also move upward when the traction rope 6319 is pulled, causing the slider 6315 to contact the lower surface of the steel channel beam 3, resulting in the slider 6315 being hindered from retracting and having high friction during retraction.

[0063] In one feasible embodiment, a limiting block 6316 is provided on one end of the slider 6315 near the center of the mounting ball 6310. The limiting block 6316 is fixed to the slider 6315 and is located within the mounting groove 6313. This prevents the end of the slider 6315 from slipping out of the groove 6312.

[0064] A construction method for a marine composite beam includes the following construction steps:

[0065] S1. Transport steel channel beam 3 to the construction sea area;

[0066] S2. Use a floating crane to hoist the steel channel beam 3 to the preset position on the top of the pier 7;

[0067] S3. Use a floating crane to erect the installation equipment 9 to the top of the bridge pier 7 for the interlocking section.

[0068] S4. The steel channel beam 3 is connected and reinforced to the erection equipment 9 by the steel cable tie system 6;

[0069] S5. Use a floating crane to lift the precast reinforced concrete bridge deck 1 onto the steel channel beam 3.

[0070] S6. Start the sliding crane system above the main beam of the erection equipment 9, and lift the precast reinforced concrete bridge deck 1 to a suspended state through the hook 934;

[0071] S7. Fine-tune the position of the gantry crane in the sliding gantry crane system so that the precast reinforced concrete bridge surface is aligned and then lowered and fixed.

[0072] S8. Repeat S6-S7 until the bridge deck construction is completed.

[0073] In one feasible approach, step S4 includes the following construction steps:

[0074] S41. Vertical anchor cables 62 are placed downwards through the reserved holes from the upper end of the I-beam at the bottom of the truss main beam 91.

[0075] S42, the vertical anchor cable 62 passes downward through the pre-reserved hole at the bottom of the steel channel beam 3, and then passes through the steel cable limiting element 63;

[0076] S43. The vertical anchor cable 62 is limited and fixed by the steel cable limiting element 63;

[0077] S44. The upper part of the vertical steel cable is tied and fixed by hydraulic jack 61 to complete the connection and reinforcement between the steel channel beam 3 and the erection equipment 9.

[0078] The technical effects of the above construction method are as follows:

[0079] Significant economic benefits: By coordinating general floating crane equipment 4 and specialized erection equipment 9, construction tasks that previously required large floating cranes can now be completed, effectively reducing equipment costs. Shorter construction time: The large number of general floating crane equipment 4 allows for controllable scheduling; steel channel beams 3 and bridge decks can be erected simultaneously, and multiple working faces can be set up to ensure continuous construction of steel channel beams 3 and bridge decks, significantly reducing construction uncertainty and thus improving efficiency. Green construction and sustainable development: Carbon emissions can be significantly reduced; the energy consumption of general floating crane equipment 4 is only 1 / 3 that of large floating cranes, aligning with low-carbon construction trends; erection equipment 9 can be disassembled and transported, and reused in different projects, reducing resource waste.

[0080] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A construction device for marine composite beams, characterized in that: It includes float fishing equipment and erection equipment. The float fishing equipment is used to hoist the steel channel beam to a preset position on the top of the bridge pier, and to hoist the erection equipment to the interlocking section on the top of the bridge pier so that the erection equipment is located above the steel channel beam. It also includes hoisting several precast reinforced concrete bridge panels onto the steel channel beam. The erection equipment is used to hoist and lay several precast reinforced concrete bridge panels onto designated positions on the steel channel beam. The float fishing equipment includes a float fishing boat and a lifting device. The erection equipment includes a truss-type main beam. The truss-type main beam is provided with several support leg assemblies and multiple crane sliding assemblies. The support leg assemblies are set in the interlocking section at the top of the pier. The truss-type main beam is also provided with several evenly distributed steel cable tie assemblies. The steel cable tie assemblies are used to stably connect the erection equipment to the steel channel beam.

2. The construction equipment for a marine composite beam according to claim 1, characterized in that: The support leg assembly includes a vertical support leg, a support bracket, and several stabilizing rods. The support bracket is fixed to the truss-type main beam, one end of the vertical support leg is vertically fixed to the support bracket, and the two ends of the several stabilizing rods are respectively inclinedly connected to the bottom surface of the support bracket and the side surface of the vertical support leg.

3. The construction equipment for a marine composite beam according to claim 1, characterized in that: The multi-crane sliding assembly includes a sliding crane beam, a first sliding crane, and a second sliding crane. The sliding crane beam is fixed to the truss main beam, and the first and second sliding cranes are slidably connected to the sliding crane beam. Both the first and second sliding cranes are equipped with hooks.

4. The construction equipment for a marine composite beam according to claim 1, characterized in that: The cable tie assembly includes a hydraulic jack, a vertical anchor cable, and a cable limiting element. The hydraulic jack is fixed to the truss-type main beam. One end of the vertical anchor cable is connected to the movable end of the hydraulic jack, and the other end of the vertical anchor cable passes through the steel channel beam. The cable limiting element is set on the other end of the vertical anchor cable to prevent the end of the vertical anchor cable from vertically separating from the steel channel beam.

5. The construction equipment for a marine composite beam according to claim 4, characterized in that: The cable limiting element includes a mounting ball. The mounting ball has a through-groove along its horizontal inner circumference, and an mounting groove on its outer side. The mounting ball also has a through-groove along its vertical inner circumference, with several mounting channels on its outer circumference. These mounting channels communicate with the mounting groove. A slider is located within the groove. A fixing plate is located at one end of the mounting groove near the center of the mounting ball. A spring is located between the fixing plate and the slider, with both ends of the spring fixedly connected to the slider and the fixing plate, respectively. A traction rope is located within the mounting channels. One end of the traction rope is fixed to the slider, and the other end is located outside the mounting ball and detachably connected to a vertical anchor cable. A stop is located at the end of the vertical anchor cable, which is situated within the vertical groove.

6. The construction equipment for a marine composite beam according to claim 5, characterized in that: The upper end of the mounting ball is provided with a sleeve, which is sleeved on the vertical anchor cable. A nut is provided on the outer surface of the sleeve, and a rotating block is provided on the outside of the nut. The rotating block is rotatably connected to the nut, and the other end of several traction ropes is fixedly connected to the rotating block.

7. The construction equipment for a marine composite beam according to claim 5, characterized in that: A limiting block is provided on one end of the slider near the center of the mounting ball. The limiting block is fixed on the slider and is located in the mounting groove.

8. A construction method for a marine composite beam according to any one of claims 1-4, characterized in that: The construction steps include the following: S1. Transport the steel channel beam to the construction sea area; S2. Use a floating crane to lift the steel channel beam to the preset position on the top of the bridge pier; S3. Use a floating crane to erect the equipment to the top of the bridge pier for the patching section. S4. The steel channel beam is connected and reinforced to the erection equipment through a steel cable tying system; S5. Use a floating crane to lift the precast reinforced concrete bridge deck onto the steel channel beam; S6. Start the sliding crane system above the main beam of the erection equipment and lift the precast reinforced concrete bridge deck to a suspended state using the hook; S7. Fine-tune the position of the gantry crane in the sliding gantry crane system so that the precast reinforced concrete bridge surface is aligned and then lowered and fixed. S8. Repeat S6-S7 until the bridge deck construction is completed.

9. A construction method for a marine composite beam according to claim 8, characterized in that: Step S4 includes the following construction steps: S41. Vertical anchor cables are placed downwards from the upper end of the I-beam at the bottom of the truss main beam through the reserved holes; S42. The vertical anchor cable passes downward through the pre-reserved hole at the bottom of the steel channel beam, and then through the steel cable limiting element; S43. Vertical anchor cables are limited and fixed by steel cable limiting elements; S44. The upper part of the vertical steel cable is tied and fixed by hydraulic jacks to complete the connection and reinforcement between the steel channel beam and the erection equipment.

Images