Reinforced concrete hanging box structure and construction method thereof

Abstract

The invention discloses a reinforced concrete hanging box structure and a construction method thereof.The reinforced concrete hanging box structure comprises a hanging box wall body with a built-in compartment, a bottom plate with a bottom hole capable of being opened and closed, a guiding device and a hanging and pressing system, the hanging box wall body and the bottom plate are integrally connected in a sealed mode before hanging, and the bottom hole capable of being opened and closed is formed in the bottom plate; up-down floating of the steel hanging box is achieved by controlling the water volume of the compartment, the steel hanging box can adapt to tidal level changes in a shallow sea area, the bottom plate is provided with a large-size bottom hole, the steel hanging box can downwards penetrate through a steel casing when the steel hanging box is put down, and the procedure of additionally installing and connecting the bottom plate underwater in traditional steel-concrete hanging box construction is omitted; the inner side of the steel hanging box can be blocked by closing the baffle, pouring and sealing are efficiently and rapidly carried out, the construction period is remarkably shortened, the construction efficiency is improved, meanwhile, the arranged steel hanging box structure can be flexibly operated in a shallow sea area, dependence on traditional construction equipment is reduced, the construction cost is reduced, and the influence on the environment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more specifically, to a steel-concrete hanging box structure and a construction method thereof. Background Art

[0002] When building bridges in shallow waters, fully prefabricated steel boxes are usually used in traditional construction. These steel boxes need to be hoisted to the construction site and mounted on the steel casing of the high pile cap. However, this method has some problems, such as the high cost of fully prefabricated steel boxes, the large overall size of the steel boxes, and the difficulty in adjusting the prefabricated bottom plates on the steel boxes so that they can be accurately mounted on each steel casing. In addition, the steel boxes are difficult to adapt to changes in tide levels and wave impacts, resulting in low construction safety and efficiency. Therefore, new structural designs are urgently needed to meet these needs. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a steel-concrete hanging box structure and a construction method thereof, so as to solve the technical problem that the existing technology of steel hanging box construction requires underwater concrete bottom sealing.

[0005] In order to achieve these purposes and other advantages according to the present invention, on the one hand, the present invention provides a steel-concrete hanging box structure, comprising: The hoisting box wall is an annular structure, a plurality of compartments are symmetrically arranged in the hoisting box wall, a plurality of internal and external communicating vessels are arranged on the hoisting box wall, a vent valve is arranged on each compartment, and an inner support is abutted against the inner side of the hoisting box wall; The bottom plate is covered and sealed and connected to the bottom of the hanging box wall body, and forms a steel hanging box with the hanging box wall body. A bottom hole is opened on the bottom plate corresponding to each steel casing, and the size of the bottom hole is larger than the outer diameter of the steel casing. A U-shaped baffle is relatively hinged on the bottom hole, and the baffle can be rotated upward to expose the bottom hole. When each pair of baffles is relatively rotated to a horizontal state, a through hole matching the steel casing is formed on the inner side; A guide device is symmetrically connected to the inner side of the hanging box wall and is slidably connected to the outer side wall of the positioning pile, and is used to guide the hanging box wall to be lowered. The positioning pile is arranged between the outer circle of steel casings; The hanging and compression system includes hanging legs and tension and compression rod assemblies. Support beams are fixed on the top of all steel casings. The tension and compression rod assemblies are vertically connected between the support beams and the base plate. The hanging legs are welded horizontally at the top of the hanging box wall toward the inside of the hanging box and are symmetrically arranged relative to the hanging box wall, so as to hang the hanging box wall on the top of the corresponding steel casing.

[0006] Preferably, guide frames are provided on the top of the steel casing abutting against the hanging legs along the length direction of the corresponding hanging legs, and the guide frames are used to support and limit the hanging legs at corresponding positions upward so that the steel hanging box as a whole is located at the designed position in the horizontal plane direction.

[0007] Preferably, a first hook is connected to a surface of one side of the baffle close to the hanging box, a second hook is provided on the bottom plate close to the baffle, and a pull ring is detachably connected between the first hook and the second hook to limit the baffle when it is opened.

[0008] Preferably, the tension and compression rod assembly includes a compression rod, a distributor, and a tension rod. The upper end of the compression rod is passed through the support beam and tightened by a nut, and the lower end of the compression rod is passed through and fixed on the distributor. A pair of tension rods are arranged in an eight-shaped shape corresponding to each compression rod, and the upper end of the tension rod is fixedly connected to the distributor, and the lower end of the tension rod is fixedly connected to the top of the base plate.

[0009] Preferably, a circle of wave-proof structure is arranged on the top of the hanging box wall, and the wave-proof structure includes a cover plate, the width of the cover plate is greater than the thickness of the hanging box wall, and two clamping rings are arranged in parallel on the bottom of the cover plate, which are inserted into the tops of the inner and outer side walls of the hanging box wall through the clamping rings, and the end of the cover plate away from the inner side of the hanging box is upwardly connected to a wave-proof plate, and a support rod is connected between the side of the wave-proof plate facing the inside of the hanging box and the top of the cover plate.

[0010] On the other hand, the present invention also provides a construction method of a steel-concrete hanging box structure, comprising the following steps: S1. After the pile foundation construction is completed, the drilling area platform is dismantled, the steel casing below the diagonal brace of the inner support is cut off to the designed elevation, the support beam is welded on the top of the steel casing, the upper end of the tension and compression rod assembly is connected and installed, the hanging leg is welded on the top of the hanging box wall, and the riverbed surface is cleaned to the designed elevation; S2, installing the lower end of the tension and compression rod assembly on the bottom plate, lifting the steel hanging box by floating crane, and slowly lowering the steel hanging box from above the steel pipe pile by the guiding device, the bottom holes correspond to the steel pipe piles one by one, and during the lifting process, the inner communicating vessel, the outer communicating vessel, and the vent valve are all in an open state, and the connecting valve is in a closed state; S3, after the steel hanging box is launched into the water, it is immersed in the water through the inner communicating vessel and the outer communicating vessel, and water is automatically injected into the hanging box wall to assist the steel hanging box to sink until the hanging legs are stably placed on the corresponding steel casing, so that the steel hanging box sinks into place, the upper end of the tension and compression rod assembly is connected with the lower end of the tension and compression rod assembly, the hanging legs are firmly connected with the steel casing, the water in the compartment is pumped out, and then the guide device is temporarily fixed with the corresponding steel casing, and at low tide, a limit flat joint is welded between the hanging box wall and the steel casing for connection; S4. Clean the debris and silt around the bottom plate and the steel casing, rotate the baffle toward the steel casing to a horizontal state, form a blockage of the outside of the steel casing at the bottom hole, and pour 1m thick bottom concrete at one time during low tide. During the pouring of the bottom concrete, the inner communicating vessel, the outer communicating vessel, and the air valve are in an open state, and the connecting valve is in a closed state. After the bottom concrete reaches the designed strength, choose a suitable water level to open the connecting valve, close the inner communicating vessel, the outer communicating vessel and the air valve, pump water in stages from the inside of the steel hanging box and the compartment until it is drained, then weld the conversion rod and the structural diagonal brace, and pour the foundation concrete for construction.

[0011] Preferably, before installing the support beam, four grooves are opened downward along the cross direction on the top of the corresponding steel casing. The support beam is a symmetrically arranged cross structure and is aligned downward and embedded in the four grooves. The length of the support beam is greater than the outer diameter of the steel casing. Four groups of tension and compression rod assemblies are provided corresponding to each of the support beams, and the upper end of each group of tension and compression rod assemblies is connected to the end of the support beam extending beyond the steel casing.

[0012] The present invention has at least the following beneficial effects: (1) The steel-concrete box structure of the present invention comprises a box wall with compartments, a bottom plate with openable and closable bottom holes and a guide device, and a hanging and pressing system. The box wall and the bottom plate are integrally sealed and connected before hoisting. A bottom hole that can be opened and closed is arranged on the bottom plate, so that the steel box can be directly lowered through the steel casing. The characteristics of the floating box with compartments are utilized to control the water volume in the steel box to achieve the up and down floating of the steel box, which can adapt to the changes in the tidal level in the shallow sea area. A support beam is arranged on the top of the steel casing, and a tension and compression rod assembly is arranged under the support beam to ensure the safety of the force when the steel box is sealed. A hanging leg is arranged on the top of the box wall, which can be hung on the steel casing for fixing. A wave-breaking board structure is arranged on the box wall, which can effectively reduce the impact of waves, protect the box and its internal structure from the influence of waves, and enhance its adaptability in harsh marine environments.

[0013] (2) The construction method of the steel-concrete hanging box structure of the present invention can realize the overall floating of the steel hanging box by controlling the water volume when the steel hanging box is in different construction stages by correspondingly controlling the on-off of the control valve body and the communicating vessel. The steel hanging box can be smoothly lowered by utilizing the larger bottom hole reserved on the bottom plate when the baffle is opened, thus saving the additional underwater installation process of the bottom plate required in the traditional steel-concrete hanging box construction. The inner side of the steel hanging box can be sealed by closing the baffle, and casting and sealing can be carried out efficiently and quickly, which significantly shortens the construction period and improves the construction efficiency. At the same time, the set steel hanging box structure can be flexibly operated in shallow sea areas and can be directly fixed to the steel casing. Subsequent construction operations no longer need to support the steel hanging box by floating crane, thus reducing the dependence on traditional construction equipment, reducing construction costs, and reducing the impact on the environment.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the structure of the steel hanging box of the present invention at the location where the guide device is set; Figure 2 It is a top view of the structure of the steel hanging box of the present invention when the inner support position is set; Figure 3 It is a left-side sectional structural diagram of the steel hanging box of the present invention; Figure 4 It is a side structural diagram of the tension and compression rod assembly of the present invention; Figure 5 It is a front structural diagram of the guide frame of the present invention; Figure 6 It is a side structural diagram of the wave-proof device of the present invention; Figure 7 It is a three-dimensional structural diagram of the bottom plate of the present invention; Figure 8 It is a side view structural diagram corresponding to construction step S1 of the steel-concrete hanging box structure construction method of the present invention; Fig. 9 It is a side structural diagram corresponding to construction step S2 of the steel-concrete hanging box structure construction method of the present invention; Fig.10 It is a side structural diagram corresponding to construction step S3 of the steel-concrete hanging box structure construction method of the present invention; Fig.11 It is a top view of the structure of the steel hanging box of the present invention during the construction corresponding to step S3; Fig.12 It is a side structural diagram corresponding to construction step S4 of the steel-concrete hanging box structure construction method of the present invention; Description Figure Numbers: 1. hanging box wall, 11. compartment, 12. outer wall of the hanging box wall, 2. steel casing, 21. groove, 3. guide device, 31. support rod, 32. support panel, 33. positioning pile, 41. inner connecting vessel, 42. outer connecting vessel, 43. water pump, 44. connecting pipe, 51. bottom plate, 52. fixing bolt, 53. rubber gasket, 6. inner support, 61. main support, 62. oblique support, 63. pad, 7. support beam, 71. nut, 72. pressure rod, 73. distributor, 74. pull rod, 75. connecting bolt, 8. hanging leg, 81. guide frame, 82. shelf beam, 9. wave-breaking plate, 91. cover plate, 92. support rod, 93. clamping ring, 10. baffle, 101. first hook, 102. second hook, 103. pull ring. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1-12 As shown, the present invention provides a steel-concrete hanging box structure, comprising: The hoisting box wall body 1 is an annular structure, and a plurality of compartments 2 are symmetrically arranged in the hoisting box wall body 1. A plurality of internal communicating vessels 41 and external communicating vessels 42 are arranged on the hoisting box wall body 1. A vent valve is arranged on each compartment 2. The external communicating vessel 42 is used to connect the inside and outside of the hoisting box. The inner side of the hoisting box wall body 1 is abutted against an inner support 6. The bottom plate 51 is sealed and connected to the bottom of the hanging box wall 1, and forms a steel hanging box with the hanging box wall 1. A bottom hole is formed on the bottom plate 51 corresponding to each steel casing 2. The size of the bottom hole is larger than the outer diameter of the steel casing 2. A U-shaped baffle 10 is relatively hinged on the bottom hole. The baffle 10 can be rotated upward to expose the bottom hole. When each pair of baffles 10 is relatively rotated to a horizontal state, a through hole matching the steel casing 2 is formed on the inner side; The guide device 33 is symmetrically connected to the inner side of the hanging box wall 1 and is slidably connected to the outer side wall of the positioning pile 33, and is used to guide the hanging box wall 1 to be lowered. The positioning pile 33 is arranged between the outer circle of steel casings 2; The hanging and pressing system includes hanging legs 8 and tension and compression rod 72 assemblies. Support beams 7 are fixed on the tops of all steel casings 2. The tension and compression rod 72 assemblies are vertically connected between the support beams 7 and the bottom plate 51. The hanging legs 8 are welded horizontally on the top of the hanging box wall 1 toward the inside of the hanging box and are symmetrically arranged relative to the hanging box wall 1, so as to hang the hanging box wall 1 on the tops of the corresponding steel casings 2.

[0019] Before lowering the steel box, the positioning piles 33 should be sunk, and the positioning piles 33 should be poured with concrete to ensure their rigidity. If there is interference between the steel casing 2 and the top inner support 6 of the steel box, it should be cut off before lowering the steel box. Generally, the inner support 6 is a steel support, including a main support 61 and an inclined support 62, so that the entire box wall 1 forms a steel box with high structural strength. Figure 3 As shown, a rubber gasket 53 should be arranged between the outer wall 12 of the hoisting box wall 1 and the concrete bottom plate 51, and the rubber gasket 53 and the bottom plate 51 are connected by fixing bolts 52 to ensure the sealing of the bottom of the steel hoisting box. When the steel hoisting box is lowered, the baffle 10 is set in a vertical state. After being lowered into place, the baffle 10 closes the space between the bottom hole and the steel casing 2.

[0020] By building a compartment 2 on the wall 1 of the hanging box, and a vent valve, an inner communicating vessel 41, and an outer communicating vessel 42 for opening and closing different spaces, the opening and closing of the valve body and the communicating vessel can be controlled accordingly when the steel hanging box is in different construction stages, so that the steel hanging box can float up and down as a whole by controlling the water volume to adapt to the change of tide level in the shallow sea area. A support beam 7 is arranged on the top of the steel casing 2, and a tension and compression rod 72 assembly is arranged under the support beam 7 to ensure the safety of the force when the steel hanging box is sealed at the bottom. When the steel hanging box starts to be lowered, the initial position and moving direction of the lowering are guided by the guide device 33, and the guide device 33 can It consists of a vertically arranged arc-shaped support panel 32 and a support rod 9231 connecting the support plate and the hanging box wall 1 on the inner side wall of the hanging box. A hanging leg 8 is arranged on the top of the hanging box wall 1. According to the target lowering position of the steel hanging box, the steel casing 2 supporting the hanging leg 8 is cut. Of course, the structure of the hanging leg 8 itself can also be designed to match the height of the steel casing 2. The hanging leg 8 is hung on the steel casing 2 for fixation. Subsequent construction operations no longer need to support the steel hanging box by floating lifting, which reduces dependence on traditional construction equipment, reduces construction costs, and also reduces impact on the environment.

[0021] In another technical solution, Figure 5 , 8 -12, the top of the steel casing 2 abutting against the hanging leg 8 is provided with a guide frame 81 along the length direction corresponding to the hanging leg 8, and the guide frame 81 is used to support and limit the hanging leg 8 at the corresponding position upward, so that the steel hanging box as a whole is located at the designed position in the horizontal plane direction. First, a shelf beam 82 is fixed radially on the top of the steel casing 2, and then a pair of guide bars are fixed on the shelf beam 82 along the same length direction, and a guide groove is formed between the pair of guide bars. The guide bars are arranged downwardly and tilted toward the inner side of the interval, and the bottom spacing of the guide groove is the same as the width of the hanging leg 8, so as to guide the movement of the hanging leg 8. The hanging legs 8 are symmetrically arranged relative to the hanging box wall 1, and some hanging legs 8 are arranged on the opposite sides. When all the hanging legs 8 are located at the bottom of the corresponding guide grooves, the position of the steel hanging box as a whole in the horizontal plane is adjusted to the right position.

[0022] In another technical solution, Figure 7 , 11As shown, a first hook 101 is connected to a surface of one side of the baffle 10 close to the hanging box, a second hook 102 is provided on the bottom plate 51 close to the baffle 10, and a pull ring 103 is detachably connected between the first hook 101 and the second hook 102 to limit the baffle 10 when it is opened.

[0023] A pair of U-shaped baffles 10 have semicircular arc grooves on their inner sides, and the two arc grooves just match the shape of the steel casing 2. A circle of stepped grooves can be set corresponding to the edge of the bottom hole to better support and match the baffle 10 when it is lowered to a horizontal state. Before pouring the bottom concrete, remove the pull ring 103, and the baffle 10 falls to seal the bottom hole on the outside of the steel casing 2, thereby stopping the slurry.

[0024] In another technical solution, Figure 4 , 11 As shown, the tension and compression rod 72 assembly includes a compression rod 72, a distributor 73, and a tension rod 74. The upper end of the compression rod 72 is passed through the support beam 7 and tightened by a nut 71. The lower end of the compression rod 72 is passed through and fixed on the distributor 73. A pair of tension rods 74 are arranged in an eight-shaped pattern corresponding to each compression rod 72. The upper end of the tension rod 74 is fixedly connected to the distributor 73, and the lower end is fixedly connected to the top of the bottom plate 51. The upper end compression rod 72 is vertically connected to the distributor 73, and the lower end tension rod 74 is symmetrically arranged to face the distributor 73. The structure is relatively simple, and the connection and disassembly between the support beam 7 and the bottom plate 51 are convenient. The relative lengths of the tension rod 74 and the compression rod 72 can be adjusted according to the distance between the top of the steel casing 2 and the bottom plate 51 to ensure the safety and balance of the force when the steel hanging box is sealed.

[0025] In another technical solution, Figure 1-2 As shown in Figure 6, a circle of wave-proof structure is arranged on the top of the hanging box wall body 1, and the wave-proof structure includes a cover plate 91, the width of the cover plate 91 is greater than the thickness of the hanging box wall body 1, and two clamping rings 93 are arranged in parallel at the bottom of the cover plate 91, which are inserted into the top of the inner and outer side walls of the hanging box wall body 1 through the clamping rings 93. The end of the cover plate 91 away from the inner side of the hanging box is upwardly connected with a wave-proof plate 9, and a support rod 9231 is connected between the side of the wave-proof plate 9 facing the inside of the hanging box and the top of the cover plate 91. The setting of the wave-proof plate can effectively reduce the impact of waves, protect the hanging box and its internal structure from the influence of waves, and enhance its adaptability in harsh marine environments.

[0026] The present invention also provides a construction method for a steel-concrete hanging box structure, combining Figure 1-12 As shown, the following steps are included: S1. After the pile foundation construction is completed, the drilling area platform is removed, the steel casing 2 below the inclined support 62 of the inner support 6 is cut off to the designed elevation, the support beam 7 is welded on the top of the steel casing 2, the upper end of the tension and compression rod 72 assembly is connected and installed, the hanging leg 8 is welded on the top of the hanging box wall 1, and the riverbed surface is cleaned to the designed elevation.

[0027] The steel hanging box should be hoisted and lowered during low tide, sunny and light wind, and low tide. Before lowering, it is necessary to check and ensure that there are no obstacles remaining on the steel casing 2 that may hinder the sinking of the steel hanging box.

[0028] S2, install the lower end of the tension and compression rod 72 assembly on the bottom plate 51, use the floating crane to lift the steel hanging box, use the guide device 33 to slowly lower the steel hanging box from the top of the steel pipe pile, the bottom hole corresponds to the steel pipe pile one by one, and adjust the balance of the steel hanging box by controlling the opening state of the inner connecting vessel, the outer connecting vessel, and the air valve during the lifting process. The outer connecting vessel 42 of the steel hanging box should remain connected to keep the internal and external water head difference balanced, and the inner connecting vessel should be adjusted according to the tide level to ensure that the force on the hanging leg 8 does not exceed the limit.

[0029] S3. After the steel hanging box is launched into the water, it is immersed in the water through the inner communicating vessel 41 and the outer communicating vessel 42, and water is automatically injected into the hanging box wall 1 to assist the sinking of the steel hanging box. During the sinking of the steel hanging box, the floating crane slowly falls until the hanging leg 8 is stably placed on the corresponding steel casing 2, so that the steel hanging box sinks into place, and the upper end of the tension and compression rod 72 assembly is connected with the lower end of the tension and compression rod 72 assembly. The hanging leg 8 and the steel casing 2 are firmly connected by using a stiffening plate, a pad 62, etc., and the water in the compartment 2 is pumped out through the connecting pipe 44 by a water pump 43. Then, the guide device 33 and the corresponding steel casing 2 are temporarily fixed by a wedge block. At low tide, a limit flat joint is welded between the hanging box wall 1 and the steel casing 2 for connection.

[0030] S4. Clean the debris and silt around the bottom plate 51 and the steel casing 2, rotate the baffle 10 toward the steel casing 2 to a horizontal state, form a blockage at the bottom hole to the outside of the steel casing 2 to prevent concrete leakage, and pour 1m thick bottom concrete at one time during low tide. During the pouring of the bottom concrete, the inner communicating vessel, the outer communicating vessel, and the air valve are in an open state, and the water levels inside and outside the hanging box are dynamically adjusted to remain consistent. After the bottom concrete reaches the design strength, close the inner communicating vessel, the outer communicating vessel and the air valve, pump water in stages from the inside of the steel hanging box and the compartment 2 until it is drained, then weld the conversion pull rod 74 and construct the inclined support 62, and pour the foundation concrete for construction.

[0031] In another technical solution, Figure 3As shown, before installing the support beam 7, four grooves 21 are opened downward along the cross direction at the top of the corresponding steel casing 2 to facilitate the installation of the support beam 7. The support beam 7 is a symmetrically arranged cross structure and is aligned downward and embedded in the four grooves 21. The length of the support beam 7 is greater than the outer diameter of the steel casing 2. Four groups of tension and compression rod 72 assemblies are provided corresponding to each of the support beams 7, and the upper end of each group of tension and compression rod 72 assemblies is connected to the end of the support beam 7 that extends beyond the steel casing 2.

[0032] The construction method of the steel-concrete hanging box structure of the present invention utilizes the floating hanging box characteristics of the built-in compartment 2, and realizes the up and down floating of the steel hanging box by controlling the water volume in the steel hanging box, which can adapt to the changes in tide levels in shallow sea areas. By pre-sealing and connecting the bottom plate 51 and the hanging box wall 1 as an integral whole, the larger bottom hole reserved in the bottom plate 51 when the baffle 10 is opened can be directly utilized to smoothly lower the steel hanging box, thereby saving the additional underwater installation and connection process of the bottom plate 51 required in the traditional steel-concrete hanging box construction. By closing the baffle 10, the inside of the steel hanging box can be sealed, and pouring and sealing can be carried out efficiently and quickly, which significantly shortens the construction period and improves the construction efficiency. At the same time, the set steel hanging box structure can be flexibly operated in shallow sea areas, reduces the dependence on traditional construction equipment, reduces construction costs, and reduces the impact on the environment.

[0033] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A steel-concrete hanging box structure, characterized in that: include: The hoisting box wall is an annular structure, a plurality of compartments are symmetrically arranged in the hoisting box wall, a plurality of internal and external communicating vessels are arranged on the hoisting box wall, a vent valve is arranged on each compartment, and an inner support is abutted against the inner side of the hoisting box wall; The bottom plate is covered and sealed and connected to the bottom of the hanging box wall body, and forms a steel hanging box with the hanging box wall body. A bottom hole is opened on the bottom plate corresponding to each steel casing, and the size of the bottom hole is larger than the outer diameter of the steel casing. A U-shaped baffle is relatively hinged on the bottom hole, and the baffle can be rotated upward to expose the bottom hole. When each pair of baffles is relatively rotated to a horizontal state, a through hole matching the steel casing is formed on the inner side; A guide device is symmetrically connected to the inner side of the hanging box wall and is slidably connected to the outer side wall of the positioning pile, and is used to guide the hanging box wall to be lowered. The positioning pile is arranged between the outer circle of steel casings; The hanging and compression system includes hanging legs and tension and compression rod assemblies. Support beams are fixed on the top of all steel casings. The tension and compression rod assemblies are vertically connected between the support beams and the base plate. The hanging legs are welded horizontally at the top of the hanging box wall toward the inside of the hanging box and are symmetrically arranged relative to the hanging box wall, so as to hang the hanging box wall on the top of the corresponding steel casing.

2. The steel-concrete hanging box structure according to claim 1 is characterized in that: A guide frame is provided on the top of the steel casing abutting against the hanging legs along the length direction of the corresponding hanging legs, and the guide frame is used to support and limit the hanging legs at corresponding positions upward so that the steel hanging box as a whole is located at the designed position in the horizontal direction.

3. The steel-concrete hanging box structure according to claim 1 is characterized in that: A first hook is connected to a surface of one side of the baffle close to the hanging box, a second hook is arranged on the bottom plate close to the baffle, and a pull ring is detachably connected between the first hook and the second hook to limit the baffle when it is opened.

4. The steel-concrete hanging box structure according to claim 1 is characterized in that: The tension and compression rod assembly includes a compression rod, a distributor, and a tension rod. The upper end of the compression rod is passed through the support beam and tightened by a nut, and the lower end of the compression rod is passed through and fixed on the distributor. A pair of tension rods are arranged in an eight-shaped shape corresponding to each compression rod. The upper end of the tension rod is fixedly connected to the distributor, and the lower end is fixedly connected to the top of the base plate.

5. The steel-concrete hanging box structure according to claim 1 is characterized in that: A circle of wave-proof structure is arranged on the top of the hanging box wall, and the wave-proof structure includes a cover plate. The width of the cover plate is greater than the thickness of the hanging box wall. Two clamping rings are arranged in parallel on the bottom of the cover plate, which are inserted into the tops of the inner and outer side walls of the hanging box wall through the clamping rings. The end of the cover plate away from the inner side of the hanging box is upwardly connected to a wave-proof plate, and a support rod is connected between the side of the wave-proof plate facing the inside of the hanging box and the top of the cover plate.

6. The construction method of the steel-concrete hanging box structure according to claim 1, characterized in that: The steps include: S1. After the pile foundation construction is completed, the drilling area platform is dismantled, the steel casing below the diagonal brace of the inner support is cut off to the designed elevation, the support beam is welded on the top of the steel casing, the upper end of the tension and compression rod assembly is connected and installed, the hanging leg is welded on the top of the hanging box wall, and the riverbed surface is cleaned to the designed elevation; S2, installing the lower end of the tension and compression rod assembly on the bottom plate, using a floating crane to lift the steel hanging box, using the guide device to slowly lower the steel hanging box from above the steel pipe pile, the bottom holes correspond to the steel pipe piles one by one, and adjusting the balance of the steel hanging box by controlling the opening states of the inner communicating vessel, the outer communicating vessel, and the air vent during the lifting process; S3, after the steel hanging box is launched into the water, it is immersed in the water through the inner communicating vessel and the outer communicating vessel, and water is automatically injected into the hanging box wall to assist the steel hanging box to sink until the hanging legs are stably placed on the corresponding steel casing, so that the steel hanging box sinks into place, the upper end of the tension and compression rod assembly is connected with the lower end of the tension and compression rod assembly, the hanging legs are firmly connected with the steel casing, the water in the compartment is pumped out, and then the guide device is temporarily fixed with the corresponding steel casing, and at low tide, a limit flat joint is welded between the hanging box wall and the steel casing for connection; S4. Clean the debris and silt around the bottom plate and the steel casing, rotate the baffle toward the steel casing to a horizontal state, form a blockage of the outside of the steel casing at the bottom hole, and pour 1m thick bottom concrete at one time during low tide. During the pouring of the bottom concrete, the inner communicating vessel, the outer communicating vessel, and the air valve are in an open state, and the water levels inside and outside the hanging box are dynamically adjusted to remain consistent. After the bottom concrete reaches the design strength, close the inner communicating vessel, the outer communicating vessel, and the air valve, and pump water in stages from the inside of the steel hanging box and the compartment until it is drained, then weld the conversion rod and the structural diagonal brace, and pour the foundation concrete for construction.

7. The steel-concrete hanging box structure and the construction method thereof according to claim 6, characterized in that: Before installing the support beam, four grooves are opened downward along the cross direction on the top of the corresponding steel casing. The support beam is a symmetrically arranged cross structure and is aligned downward and embedded in the four grooves. The length of the support beam is greater than the outer diameter of the steel casing. Four groups of tension and compression rod assemblies are arranged corresponding to each of the support beams, and the upper end of each group of tension and compression rod assemblies is connected to the end of the support beam extending beyond the steel casing.

Images