A closed box type trestle and a construction method thereof

Abstract

The application relates to a closed box type trestle and a construction method thereof, and belongs to the technical field of trestles. The closed box type trestle comprises a plurality of boxes, a water filling and discharging mechanism and a plurality of connecting plates. The plurality of boxes are arranged in a row along the longitudinal direction, a cavity for loading ballast water is arranged in the box, the box is provided with a water filling and discharging opening communicated with the cavity, and a bridge deck for passing through is arranged on the top surface of the box. The water filling and discharging mechanism is connected to the water filling and discharging opening, is used for injecting ballast water into the cavity to make the box sink to the bottom of water when the closed box type trestle is installed, and is used for discharging the ballast water in the cavity to make the box float up when the closed box type trestle is removed. The connecting plates are arranged between every two adjacent boxes, one longitudinal end of the connecting plate is hinged to the bridge deck on the top of one box, and the other longitudinal end of the connecting plate is connected to the bridge deck on the top of the other adjacent box. The closed box type trestle is suitable for the coastal area with complex geology and large terrain height difference, has good stability and can meet the heavy load traffic.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of trestle bridges, and particularly relates to a closed box-type trestle bridge and a construction method thereof. BACKGROUND

[0002] A trestle bridge is a temporary bridge structure built in a station, a port, a mine or a factory area, and used for loading and unloading goods or carrying passengers up and down or used for construction site traffic, mechanical arrangement and overhead operation. In order to meet the needs of offshore construction, a temporary trestle bridge needs to be built in a coastal area sometimes. This temporary trestle bridge needs to be removed after use. However, the installation and removal construction processes of the existing trestle bridge structure are relatively cumbersome, and the construction period is long. Although the assembled trestle bridge structure can meet the requirement of rapid construction, the existing assembled trestle bridge structure is usually supported on a bearing layer by support piles, and cannot meet the requirement of heavy load traffic. In addition, the existing trestle bridge structure has a high requirement for the bearing layer, and is difficult to be constructed in an area with large changes in topographic elevation, so that the existing trestle bridge structure is extremely limited in application in a coastal area with complex geology and large changes in topographic elevation. SUMMARY

[0003] In view of the above problems existing in the existing trestle bridge structure, the present application provides a closed box-type trestle bridge and a construction method thereof. The closed box-type trestle bridge is directly placed on a seabed, has a low requirement for a bearing layer and can adapt to changes in topographic elevation, is suitable for a coastal area with complex geology and large changes in topographic elevation, has good stability, can meet the requirement of heavy load traffic, and has a high degree of assembly, is convenient to install and remove, and has a short construction period.

[0004] The present application provides a closed box-type trestle bridge, which comprises:

[0005] A plurality of boxes are arranged in a row along a longitudinal direction, a cavity for carrying ballast water is arranged in each box, a filling and draining opening is arranged in each box and connected to the cavity, and a bridge deck for passing through is arranged on the top surface of each box;

[0006] A ballast water filling and draining mechanism is connected to the filling and draining opening, used for injecting ballast water into the cavity to sink the box on the seabed when the closed box-type trestle bridge is installed, and used for draining the ballast water in the cavity to make the box float when the closed box-type trestle bridge is removed;

[0007] A plurality of plates are arranged between every two adjacent boxes, one longitudinal end of each plate is hingedly connected to the bridge deck on the top of one box, and the other longitudinal end of the plate is overlapped with the bridge deck on the top of the other adjacent box.

[0008] The closed box type trestle provided by the technical scheme can be directly seated on the seabed, and the adjacent two boxes are connected through the set connecting plate, so that the plurality of boxes are sequentially connected into a bridge. When the seabed topography has large elevation difference, different boxes can be seated on the seabeds with different elevations, so as to meet the construction requirements of the coastal area with large topographic elevation difference. Moreover, the box is directly seated on the seabed, and the contact area with the seabed is large. As long as the seabed bearing capacity meets the requirement of silt soil and the topography is generally flat, the construction requirements can be met, the requirement for the seabed bearing layer is low, the foundation treatment is not required, the construction requirements of the coastal area with complex geology can be met. Further, the box is directly seated on the seabed, has good stability, is safe and reliable, has strong resistance to sea waves, has strong traffic capacity, and can meet the heavy load traffic. Further, the box and the connecting plate are assembled, have high assembly degree, can meet the requirement of rapid bridge construction, and can be installed and constructed within one day, so that the construction period is greatly shortened. The trestle can be removed by recycling the connecting plate and the box, is simple and convenient to remove and transport, can be repeatedly used, and the construction cost is greatly reduced. In addition, the size of the box can be designed according to the water depth, and the application range is wide.

[0009] In some embodiments, the connecting plate and the bridge deck are hinged through a hinge assembly, and the hinge assembly includes a hinge shaft and a sleeve connected to the hinge shaft, and the hinge shaft and the sleeve are connected to the bridge deck and the connecting plate respectively. In the technical scheme, the hinge assembly with the hinge shaft and the sleeve is adopted, so that the rotation of the connecting plate is facilitated and the structure is reliable.

[0010] In some embodiments, the closed box type trestle further includes a driving mechanism for driving the connecting plate to rotate around the hinge end. In the technical scheme, the driving mechanism is provided, so that the connecting plate can be driven to rotate when the connecting plate is connected, and the connecting plate can be recycled when the trestle is removed.

[0011] In some embodiments, the driving mechanism includes a winch and a rope cable, one end of the rope cable is fixed to the winch, and the other end of the rope cable is connected to the connecting end of the connecting plate. In the technical scheme, the rope cable is retracted and released through the winch, so that the connecting plate can be driven to rotate.

[0012] In some embodiments, the connecting plate has an upper convex arc structure, which is beneficial to improve the stability of the connecting plate.

[0013] In some embodiments, a plurality of partitions are arranged in the chamber, the plurality of partitions divide the chamber into a plurality of compartments, and the filling and draining ports are respectively connected to the compartments. In the technical scheme, the partitions are arranged to strengthen the structural strength of the hollow box and improve the stability of the box.

[0014] In some embodiments, the water filling and draining mechanism comprises a water pipe connected to the water filling and draining port, a bidirectional pump installed on the water pipe, and a control device connected to the bidirectional pump to control water inflow and outflow. In the technical solution, water filling and draining is automatically controlled by the control device, and the efficiency of the box sinking and floating is high.

[0015] In some embodiments, a slot is formed on the top of the box to allow personnel to pass through, and a cover plate is arranged on the slot to shield the slot. The top surface of the cover plate is flush with the bridge surface. In the technical solution, the slot is provided to facilitate the installation of equipment in the box or equipment maintenance, etc.

[0016] In some embodiments, the box is prefabricated by concrete, and the outer wall of the box is wrapped with a steel shell on the lower side and the bottom surface to protect the structure of the box.

[0017] The application also provides a construction method of the closed box-type trestle, including an installation method and a removal method.

[0018] The installation method comprises the following steps:

[0019] The box is floated to the area to be constructed, the water filling and draining mechanism is used to inject ballast water into the box through the water filling and draining port to make the box sink to the seabed, the next box is sunk into position by using the same sinking step, the flap hinged on the box is rotated to make the flap lap onto the bridge surface on the top of the box, and the box is sunk one by one and the flap is lapped one by one to connect the trestle.

[0020] The removal method comprises the following steps:

[0021] The flap between the adjacent two boxes is rotated to recover the flap, the water filling and draining mechanism is used to drain the ballast water in the box through the water filling and draining port to make the box float, and the box is recovered.

[0022] Based on the above technical solution, the closed box-type trestle in the embodiment of the application directly sits on the seabed, has low requirements for the bearing layer and can adapt to the change of terrain elevation difference, is suitable for the coastal area with complex geology and large terrain elevation difference, has good stability, can meet heavy load traffic, has high assembly degree, is convenient to install and remove, and has a short construction period. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the application, constitute a part of the application, and the illustrative embodiments of the application and the description thereof are used to explain the application and do not constitute an improper limitation on the application. In the drawings:

[0024] Figure 1 It is a front view of an embodiment of the closed box-type trestle of the application (the road surface front side baffle is not shown);

[0025] Figure 2 Figure 1 is a perspective view of an embodiment of the closed box-type trestle of the present application; Figure 1 Figure 2 is an enlarged view of the detail A in Figure 1;

[0026] Figure 3 Figure 3 is a top view of an embodiment of the closed box-type trestle of the present application;

[0027] Figure 4 Figure 4 is an enlarged view of the detail B in Figure 3; Figure 3

[0028] Figure 5 Figure 5 is a schematic view of the structure of the deck in an embodiment of the closed box-type trestle of the present application;

[0029] Figure 6 Figure 6 is a schematic view of the state of the deck in an embodiment of the closed box-type trestle of the present application when in the state of recovery;

[0030] Figure 7 Figure 7 is a sectional view of the box along the line C-C; Figure 3

[0031] Figure 8 is a sectional view of the box along the line D-D; Figure 8 Figure 3 Figure 9 is a sectional view of the box along the line E-E.

[0032] Figure 9 Figure 10 is a schematic view of the structure of the box in an embodiment of the closed box-type trestle of the present application; Figure 3 Figure 11 is a schematic view of the structure of the box in an embodiment of the closed box-type trestle of the present application;

[0033]

[0034] 1, box; 2, deck; 3, driving mechanism; 4, hinged assembly; 5, irrigation and drainage mechanism; 6,

[0035] 11, retaining wall; 12, bridge deck; 13, irrigation and drainage opening; 14, steel shell; 15, connecting hole; 16, cover plate; 17, partition; 18, bin; 19, slot;

[0036] 31, winch; 32, rope; 33, support; 34, pulley;

[0037] 41, rotating shaft; 42, sleeve;

[0038] 51, water pipe; 52, bidirectional pump. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. ​​​

[0040] In the description of the present application, it should be understood that the term "longitudinal" refers to the left-right direction in the drawings, and the term "transverse" refers to the up-down direction in the drawings. Figure 1 Figure 3 In the description of the present application, it should be understood that the term "longitudinal" refers to the left-right direction in the drawings, and the term "transverse" refers to the up-down direction in the drawings.

[0041] In the description of the present application, it should be understood that the term "longitudinal" refers to the left-right direction in the drawings, and the term "transverse" refers to the up-down direction in the drawings.

[0042] As shown in FIG. 1, in one illustrative embodiment of the closed box-type trestle of the present application, the closed box-type trestle comprises a plurality of boxes 1, a water filling and draining mechanism 5, and a plurality of connecting plates 2. The plurality of boxes 1 are arranged in a row in the longitudinal direction. Each box 1 is provided with a cavity for carrying ballast water. The box 1 is provided with a filling and draining opening 13 which is in communication with the cavity. The top surface of the box 1 is provided with a bridge surface 12 for passing through. The water filling and draining mechanism 5 is connected to the filling and draining opening 13. When the closed box-type trestle is installed, the water filling and draining mechanism 5 is used to inject ballast water into the cavity so that the box 1 sinks to the bottom of the water. When the closed box-type trestle is removed, the water filling and draining mechanism 5 is used to drain the ballast water in the cavity so that the box 1 floats up. Two connecting plates 2 are arranged between every two adjacent boxes 1. One longitudinal end of each connecting plate 2 is hingedly connected to the bridge surface 12 on the top of one box 1, and the other longitudinal end of the connecting plate 2 is connected to the bridge surface 12 on the top of the adjacent box 1. Figures 1-9

[0043] ​​The box body 1 in the closed box type trestle is directly seated on the seabed, and has a large contact area with the seabed. As long as the seabed bearing capacity is above silt soil and the terrain is generally flat, the construction requirement can be met, the requirement for the seabed bearing layer is low, the foundation treatment is not needed, and the construction requirement of the complex geological coastal area can be met. Further, the box body 1 in the closed box type trestle is directly seated on the seabed, has good stability, is safe and reliable, has strong resistance to sea waves, has strong traffic capacity, and can meet heavy load traffic. Further, the closed box type trestle is assembled by the box body 1 and the connecting plate 2, has high assembly degree, can meet the requirement of rapid bridge forming, can be installed and constructed within 1 day, greatly shortens the construction period, and can be removed by recycling the connecting plate 2 and the box body 1 to float. The removal is simple, the removal and transportation are convenient, can be reused, greatly reduces the construction cost. In addition, the size of the box body 1 in the closed box type trestle can be designed according to the water depth, and the application range is wide.

[0044] In some embodiments, as shown in Figure 1 、 Figures 3-6 , the connecting plate 2 is hinged with the bridge deck 12 through a hinge assembly 4, the hinge assembly 4 includes a hinge shaft 41 and a sleeve 42 sleeved on the hinge shaft 41, and the hinge shaft 41 and the sleeve 42 are connected to the bridge deck 12 and the connecting plate 2 respectively. The hinge assembly 4 with the hinge shaft 41 matched with the sleeve 42 is convenient for the rotation of the connecting plate 2 and has reliable structure. In the embodiment, as shown in Figure 4 , the hinge shaft 41 is arranged on the bridge deck 12, and the sleeve 42 is arranged on one end of the connecting plate 2 hinged with the box body 1. It can be understood that the hinge shaft 41 can also be arranged on one end of the connecting plate 2 hinged with the box body 1, and the sleeve 42 is arranged on the bridge deck 12. When arranged in this way, the sleeve 42 is sleeved on the transverse two ends of the hinge shaft 41.

[0045] In some embodiments, in order to facilitate the rotation of the connecting plate 2 when the connecting plate 2 is connected and the recycling of the connecting plate 2 when the trestle is removed, as shown in Figure 1 、 Figure 3 、 Figure 4 and Figure 6As shown, the closed box type trestle further comprises a driving mechanism 3 for driving the rotation of the deck 2 around the hinged end (in this embodiment, the rotating shaft 41). The driving mechanism 3 comprises a winch 31 and a rope 32. One end of the rope 32 is fixed to the winch 31, and the other end of the rope 32 is connected to the hinged end of the deck 2. By winding and unwinding the rope 32 by the winch 31, the deck 2 can be driven to rotate. It should be noted that in this embodiment, the winch 31 is arranged on the road surface on the top of the box 1 at the hinged end of the deck 2. In order to facilitate the winch 31 and the rope 32 to pull up the deck 2 with a relatively long length, the driving mechanism 3 further comprises a support 33 arranged on the road surface. A pulley 34 is arranged on the top of the support 33, and the rope 32 is wound around the pulley 34. The support 33 is used to prop up the rope 32, so that the rope 32 exerts force on the deck 2 from the top, thereby facilitating the pulling up of the deck 2. It should be further noted that a receiving cavity can also be formed in the top of the box 1, so as to place the winch 31 in the receiving cavity, thereby reducing the equipment on the road surface. It can be understood that the driving mechanism 3 can also not be arranged, and the deck 2 can be manually driven to rotate when being connected.

[0046] In some embodiments, as shown in Figure 1 The deck 2 is in an arc-shaped structure with an upper convexity, which is beneficial to improve the stability of the deck 2. Preferably, the deck 2 is a steel structure. In addition, when the bridge deck 12 is wide, as shown in Figure 3 and Figure 4 The deck 2 between the adjacent two boxes 1 can be arranged in multiple numbers, and the multiple decks 2 between the adjacent two boxes 1 are arranged in parallel.

[0047] In some embodiments, as shown in Figure 7 and Figure 8 A plurality of partitions 17 are arranged in the cavity, the plurality of partitions 17 divide the cavity into a plurality of compartments 18, and the filling and draining port 13 is in communication with the compartments 18. The arrangement of the partitions 17 can strengthen the structural strength of the hollow box 1 and improve the stability of the box 1. It should be noted that the partitions 17 can be arranged in the longitudinal direction or the transverse direction according to the size of the box 1.

[0048] In some embodiments, as shown in Figure 8 The bridge deck 12 is provided with a retaining wall 11 on both sides in the transverse direction, so as to define a passing channel.

[0049] In some embodiments, as shown in Figure 9As shown, the irrigation and drainage mechanism 5 comprises a water pipe 51 connected to the irrigation and drainage port 13, a bidirectional pump 52 installed on the water pipe 51, and a control device connected to the bidirectional pump 52 to control water inflow and drainage. When the sinking box body 1, the bidirectional pump 52 is controlled by the control device to start in the forward direction, and the bidirectional pump 52 pumps the water around the box body 1 into the chamber of the box body 1 through the irrigation and drainage port 13. After the box body 1 is seated on the bottom, the control device controls the bidirectional pump 52 to close; when the box body 1 floats up, the bidirectional pump 52 is controlled by the control device to start in the reverse direction, and the bidirectional pump 52 drains the ballast water in the chamber of the box body 1 through the water pipe 51 and the irrigation and drainage port 13. After the box body 1 floats to the water surface, the control device controls the bidirectional pump 52 to close. By automatically controlling the irrigation and drainage through the control device, the sinking and floating efficiency of the box body 1 is high. It should be noted that in the present embodiment, the irrigation and drainage port 13 is preferably arranged at a position close to the bottom of the side wall of the box body 1 to ensure that the irrigation and drainage port 13 can be submerged underwater when the box body 1 floats on the water surface, so as to facilitate the pumping of water around the box body 1 into the chamber of the box body 1 by the bidirectional pump 52; the bidirectional pump 52 is arranged in the chamber of the box body 1. It should be further noted that the control device can adopt a conventional control device of a ballast water system in the art, which will not be described herein. The control device can be arranged in a shore control room.

[0050] In some embodiments, in order to facilitate the installation of equipment in the box body 1 or the equipment maintenance, etc., as shown in Figure 9 As shown, a slot 19 is arranged on the top of the box body 1 to communicate with the chamber for personnel to pass through, and a cover plate 16 is arranged on the slot 19 to shield the slot 19, and the top surface of the cover plate 16 is flush with the bridge deck 12. It should be noted that for the box body 1 with the compartments 18 inside, the slot 19 is arranged longitudinally and across all the compartments 18 in the same row in the longitudinal direction, and the number of the slot 19 is consistent with the number of the rows of the compartments 18. It should be further noted that if the bidirectional pump 52 in the chamber needs to be replaced, the ballast water in the chamber needs to be drained first, and at the same time, a sealing plate is used to close the irrigation and drainage port 13. After the irrigation and drainage port 13 is closed, the bidirectional pump 52 is replaced. In order to facilitate the closing of the irrigation and drainage port 13, as shown in Figure 2 A connecting hole 15 is arranged on the outer periphery of the irrigation and drainage port 13 for connecting the sealing plate.

[0051] In some embodiments, as shown in Figure 8 The box body 1 is prefabricated by concrete, and the outer wall of the box body 1 is wrapped with a steel shell 14 on the lower side and the bottom surface to protect the structure of the box body 1.

[0052] Based on the above-mentioned closed box-type trestle, the present application further provides a construction method of the closed box-type trestle, including an installation method and a removal method;

[0053] The installation method comprises the following steps:

[0054] The box 1 is floated to the area to be constructed, the ballast water is injected into the box 1 through the filling and draining port 13 by using the filling and draining mechanism 5, so that the box 1 is sunk to be seated on the seabed; the next box 1 is sunk to be seated by using the same sinking step, the apron 2 hinged on the box 1 sunk first is turned, so that the apron 2 is lapped to the bridge deck 12 on the top of the box 1 sunk later; the box 1 is sunk one by one and the apron 2 is lapped one by one, so that the trestle is connected;

[0055] The method for removing the trestle bridge comprises the following steps:

[0056] The apron 2 between the two adjacent boxes 1 is turned to recover the apron 2, the ballast water in the box 1 is drained through the filling and draining port 13 by using the filling and draining mechanism 5, so that the box 1 is floated, and the box 1 is recovered.

[0057] It should be noted that: the various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to.

[0058] The above embodiments are only used to illustrate the technical solutions of the present application but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

Claims

1. A construction method for a closed box-type trestle bridge, characterized in that, Enclosed box-type trestle bridges include: Multiple tanks are arranged in a longitudinal row. Each tank has a chamber for holding ballast water. Each tank has an inlet / outlet that communicates with the chamber. The top surface of each tank has a bridge deck for passage. The bridge deck has retaining walls on both sides to limit the passage. An irrigation and drainage mechanism is connected to the irrigation and drainage port. It is used to inject ballast water into the cavity during the installation of the enclosed box-type trestle to make the box sink to the bottom of the water, and to discharge the ballast water in the cavity during the removal of the enclosed box-type trestle to make the box float. Multiple ramps are provided between each pair of adjacent boxes. One longitudinal end of each ramp is hinged to the bridge surface on the top of one of the boxes, and the other longitudinal end of each ramp is attached to the bridge surface on the top of the other adjacent box. Construction methods include installation methods and dismantling methods; The installation method includes the following steps: The container is floated to the construction area, and ballast water is injected into the container through the inlet and outlet using the irrigation and drainage mechanism, so that the container is sunk to the bottom of the seabed. The same sinking steps are used to sink the next adjacent container into place, and the ramp hinged to the first-sinked container is rotated so that the ramp is connected to the bridge deck on top of the next-sinked container. The container is sunk one by one and the ramp is connected one by one to form a trestle bridge. The demolition method includes the following steps: Rotate the ramp between two adjacent boxes to retrieve the ramp, and use the irrigation and drainage mechanism to discharge the ballast water in the box through the irrigation and drainage port so that the box floats up and is retrieved.

2. The construction method of the enclosed box-type trestle bridge according to claim 1, characterized in that, The approach slab is hinged to the bridge deck via a hinge assembly, which includes a pivot and a sleeve fitted onto the pivot. The pivot and the sleeve are respectively connected to the bridge deck and the approach slab.

3. The construction method of the enclosed box-type trestle bridge according to claim 1 or 2, characterized in that, The enclosed box-type trestle also includes a drive mechanism for driving the trestle plate to rotate around the hinge end.

4. The construction method of the enclosed box-type trestle bridge according to claim 3, characterized in that, The driving mechanism includes a winch and a cable, one end of which is fixed to the winch and the other end of which is connected to the overlapping end of the ramp.

5. The construction method of the enclosed box-type trestle bridge according to claim 1, characterized in that, The mounting plate has an upward-convex arc-shaped structure.

6. The construction method of the enclosed box-type trestle bridge according to claim 1, characterized in that, The chamber is provided with multiple partitions, which divide the chamber into multiple compartments, and the filling and draining ports are respectively connected to the compartments.

7. The construction method of the enclosed box-type trestle bridge according to claim 1 or 6, characterized in that, The irrigation and drainage mechanism includes a water pipe connected to the irrigation and drainage outlet, a bidirectional pump installed on the water pipe, and a control device connected to the bidirectional pump to control water inflow and drainage.

8. The construction method of the enclosed box-type trestle bridge according to claim 1 or 6, characterized in that, The top of the box body has a slot that communicates with the chamber for personnel to pass through. The slot is covered with a cover plate to shield the slot, and the top surface of the cover plate is flush with the bridge surface.

9. The construction method of the enclosed box-type trestle bridge according to claim 1 or 6, characterized in that, The box is precast from concrete, and the lower side of the outer wall and the bottom of the box are covered with a steel shell.

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