Round steel structure hanging box for bridge construction in sea

Abstract

The utility model relates to a circular steel structure hanging box for bridge construction in sea, which comprises a reinforced concrete bottom plate and a plurality of steel hanging box side wall plates, the reinforced concrete bottom plate is sleeved on an erected engineering steel pipe pile, a plurality of vertical I-shaped steel main ribs are arranged on the inner sides of the steel hanging box side wall plates at fixed intervals along the circumferential direction, and the vertical I-shaped steel main ribs are arranged on the outer side of the steel hanging box side wall plates. A plurality of annular steel plate stiffening ribs are fixedly arranged on the inner sides of the steel hanging box side wall plates at intervals in the vertical direction, the steel hanging box side wall plates are fixedly installed on the periphery of the reinforced concrete bottom plate in the circumferential direction, and side wall partitioning connecting plates are arranged on the inner sides of the splicing positions of the adjacent steel hanging box side wall plates. And the side wall partitioning connecting plates are fixedly connected with the adjacent side wall plates of the steel hanging box through bolts respectively. According to the rectangular hoisting box, the installation procedures of the enclosing purlins and the annular supports are reduced, the stress performance of a traditional rectangular hoisting box is improved, rapid and convenient connector connection and sealing water stop are achieved, and the purposes of saving engineering materials and reducing the hoisting weight are achieved by changing the thickness of the bottom plate.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a circular steel structure caisson for use in the construction of bridges in the sea. Background Technology

[0002] Construction of bridge pier caps and lower pier sections in deep water areas requires the use of steel caissons as construction platforms. Considering the operational space needed for applying the silane anti-corrosion coating to the concrete, the caissons cannot be used as formwork. During the use of the caissons, loads such as still water pressure, wave forces, wave buoyancy, typhoon loads, and the self-weight of the pier cap during pouring must be taken into account, resulting in complex structural stresses. Therefore, a steel structure caisson is needed to reduce installation steps and improve the load-bearing performance of traditional rectangular caissons. Utility Model Content

[0003] This utility model aims to address the shortcomings of existing technologies by providing a circular steel structure caisson for the construction of bridges in the sea.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a circular steel structure caisson for construction of a bridge in the sea, comprising: a reinforced concrete base plate and multiple steel caisson side wall plates. The reinforced concrete base plate is fitted onto the erected engineering steel pipe piles. Several vertical I-beam main ribs are fixedly spaced along the circumferential direction on the inner side of each steel caisson side wall plate. Several circumferential steel plate stiffening ribs are fixedly spaced along the vertical direction on the inner side of each steel caisson side wall plate. The steel caisson side wall plates are fixedly installed circumferentially. Around the reinforced concrete base slab, a side wall segment connecting plate is provided on the inner side of the splice of adjacent steel caisson side wall panels. The side wall segment connecting plate is fixedly connected to the adjacent steel caisson side wall panels by bolts. A side wall guide plate is fixedly provided at one end of the outer side of each steel caisson side wall panel. A side wall double-peak waterstop is provided between the side wall guide plate and the outer side of the adjacent steel caisson side wall panel. A bottom plate double-peak waterstop is provided between the bottom of the steel caisson side wall panel and the reinforced concrete base slab.

[0005] Furthermore, a water-stop capsule is provided between the engineering steel pipe pile and the reinforced concrete base slab, and water-stop mortar is filled on top of the water-stop capsule to fill the gap between the engineering steel pipe pile and the reinforced concrete base slab.

[0006] Furthermore, a ball valve is provided at the bottom inner side of the side wall panel of the steel caisson.

[0007] Furthermore, the reinforced concrete base slab includes several precast reinforced concrete slabs, a working platform is installed on the engineering steel pipe pile, the precast reinforced concrete slabs are placed on the working platform, and adjacent precast reinforced concrete slabs are fixedly connected by pouring wet joints.

[0008] Furthermore, a lifting rod is fixedly installed on the outer side of the steel caisson sidewall panel, and the bottom of the lifting rod is fixedly inserted through the reinforced concrete base plate.

[0009] Furthermore, a caisson lowering system is provided at the top of the engineering steel pipe pile, and the lowering end of the caisson lowering system is fixedly connected to the reinforced concrete base plate.

[0010] Furthermore, each of the engineering steel pipe piles is provided with multiple tension and compression rods on its outer side, and the bottom of the tension and compression rods is fixedly installed on the reinforced concrete base plate.

[0011] Furthermore, each of the engineering steel pipe piles is provided with several shear keys on its outer side, and the engineering steel pipe piles are fixedly connected to the reinforced concrete base plate through the shear keys.

[0012] The beneficial effects of this utility model are as follows: This utility model designs a circular, single-walled steel caisson cofferdam structure without circumferential support for a four-pile rectangular foundation. While meeting the requirements for withstanding large wave forces, it reduces the installation procedures for walers and circumferential supports, improving the stress performance of traditional rectangular caissons. Waterproofing measures are achieved by using limiting steel plates, bolts, and double-peaked waterstops between the curved sidewalls of the steel caisson, realizing quick and convenient interface connection and sealing. A variable-thickness annular precast reinforced concrete steel caisson base plate is used, which, while adapting to the structural stress characteristics, achieves the purpose of saving engineering materials and reducing hoisting weight through varying base plate thickness. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the plan layout of this utility model;

[0014] Figure 2 This is a schematic diagram of the elevation layout of this utility model;

[0015] In the diagram: 1-Reinforced concrete base slab; 2-Steel caisson side wall plate; 3-Engineering steel pipe pile; 4-Vertical I-beam main rib; 5-Circumferential steel plate stiffening rib; 6-Side wall segmented connecting plate; 7-Side wall guide plate; 8-Side wall double-peak waterstop; 9-Base plate double-peak waterstop; 10-Waterstop capsule; 11-Waterstop mortar; 12-Ball valve; 13-Hanging rod; 14-Cesson lowering system; 15-Tension and compression rod; 16-Shear key;

[0016] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0017] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] like Figures 1-2 As shown, a circular steel structure caisson for offshore bridge construction includes: a reinforced concrete base slab 1 and multiple steel caisson sidewalls 2. The reinforced concrete base slab 1 is fitted onto pre-erected steel pipe piles 3. Several vertical I-beam main ribs 4 are fixedly spaced along the circumference of the inner side of each steel caisson sidewall 2. Several circumferential steel plate stiffening ribs 5 are also fixedly spaced along the vertical direction on the inner side of each steel caisson sidewall 2. The steel caisson sidewalls 2 are circumferentially fixedly installed on the reinforced concrete base slab 1. On the outer side, a side wall segment connecting plate 6 is provided on the inner side of the splice of the adjacent steel caisson side wall panels 2. The side wall segment connecting plate 6 is fixedly connected to the adjacent steel caisson side wall panels 2 by bolts. A side wall guide plate 7 is fixedly provided at one end of the outer side of each steel caisson side wall panel 2. A side wall double peak waterstop 8 is provided between the side wall guide plate 7 and the outer side of the adjacent steel caisson side wall panel 2. A bottom plate double peak waterstop 9 is provided between the bottom of the steel caisson side wall panel 2 and the reinforced concrete bottom plate 1.

[0020] Specifically, the steel caisson sidewall panel 2, vertical I-beam main rib 4, circumferential steel plate stiffening rib 5, and sidewall guide plate 7 are pre-welded into a single arc-shaped sidewall. A double-peak waterstop 9 is placed on the reinforced concrete base plate 1 at the position corresponding to the arc-shaped sidewall. The arc-shaped sidewall is installed in sections. A double-peak waterstop 8 is set between the sidewall guide plate 7 and the adjacent steel caisson sidewall panel 2. Finally, the adjacent steel caisson sidewall panels 2 are fixedly connected into a whole using sidewall section connecting plates 6 and bolts.

[0021] A water-stop capsule 10 is provided between the engineering steel pipe pile 3 and the reinforced concrete base slab 1. Water-stop mortar 11 is filled on top of the water-stop capsule 10, and the water-stop mortar 11 fills the gap between the engineering steel pipe pile 3 and the reinforced concrete base slab 1.

[0022] Specifically, before the caisson is lowered, a water-stop capsule 10 is placed. After lowering, the water-stop capsule 10 is filled with water and expands. Underwater water-stop mortar 11 is poured into the gap between the steel pipe pile 3 and the reinforced concrete base slab 1 to complete the water-stopping construction.

[0023] A ball valve 12 is installed at the bottom inner side of the steel caisson sidewall panel 2.

[0024] Specifically, after the caisson is lowered to the predetermined height and the water-stopping construction is completed, drainage is completed through ball valve 12.

[0025] The reinforced concrete base slab 1 includes several precast reinforced concrete slabs. A working platform is installed on the engineering steel pipe pile 3. The precast reinforced concrete slabs are placed on the working platform, and adjacent precast reinforced concrete slabs are fixedly connected by pouring wet joints.

[0026] Specifically, a working platform is installed on the already erected engineering steel pipe piles 3, and the precast reinforced concrete slabs are hoisted onto the working platform. Multiple precast reinforced concrete slabs are then assembled into a single reinforced concrete base slab 1 by pouring wet joints. The thickness of the precast reinforced concrete slabs varies in different locations. The working platform is removed before the hoisting box is lowered.

[0027] A suspension rod 13 is fixedly installed on the outer side of the steel caisson side wall panel 2, and the bottom of the suspension rod 13 is fixedly inserted into the reinforced concrete base plate 1.

[0028] Specifically, the steel caisson side wall panel 2 and the reinforced concrete base plate 1 are tightened using the suspension rod 13.

[0029] The top of the engineering steel pipe pile 3 is equipped with a caisson lowering system 14, and the lowering end of the caisson lowering system 14 is fixedly connected to the reinforced concrete base slab 1.

[0030] Specifically, when lowering the caisson, the reinforced concrete base slab 1 is lowered using the caisson lowering system 14.

[0031] Each of the engineering steel pipe piles 3 is provided with multiple tension rods 15 on its outer side, and the bottom of the tension rods 15 is fixedly installed on the reinforced concrete base plate 1.

[0032] Specifically, after the caisson is lowered to the predetermined height, the steel pipe pile 3 and the reinforced concrete base plate 1 are fixed and tightened with tension rod 15 to facilitate water-stopping construction.

[0033] Each of the engineering steel pipe piles 3 is provided with several shear keys 16 on its outer side, and the engineering steel pipe piles 3 are fixedly connected to the reinforced concrete base plate 1 through the shear keys 16.

[0034] Specifically, after the water-stopping construction is completed, the steel pipe pile 3 is fixedly connected to the reinforced concrete base plate 1 using shear keys 16.

[0035] In summary, the steps and principles of this utility model are as follows: a working platform is installed on the erected engineering steel pipe pile 3, and the segmented precast reinforced concrete slabs are hoisted onto the working platform for installation. Multiple precast reinforced concrete slabs are assembled into a single reinforced concrete base slab 1 by pouring wet joints, so that the reinforced concrete base slab 1 is located on the design water level line. Tension rods 15 are installed on the reinforced concrete base slab 1, and a caisson lowering system 14 is installed on the top of the engineering steel pipe pile 3 and connected to the reinforced concrete base slab 1.

[0036] The steel caisson side wall panel 2, vertical I-beam main rib 4, circumferential steel plate stiffening rib 5, and side wall guide plate 7 are pre-welded into a single arc-shaped side wall. A double-peak waterstop 9 is placed on the reinforced concrete base plate 1 at the position corresponding to the arc-shaped side wall. The arc-shaped side wall is installed in sections. A double-peak waterstop 8 is set between the side wall guide plate 7 and the adjacent steel caisson side wall panel 2. The adjacent steel caisson side wall panels 2 are fixedly connected into a whole by the side wall section connecting plate 6 and bolts to form a circular caisson side wall. A suspension rod 13 is set to tighten the steel caisson side wall panel 2 and the reinforced concrete base plate 1.

[0037] A water-stop capsule 10 is placed between the gap between the engineering steel pipe pile 3 and the reinforced concrete base slab 1. The working platform is removed, and the caisson is lowered to the design position using the caisson lowering system 14. The tension rod 15 is connected to the engineering steel pipe pile 3. The water-stop capsule 10 is filled with water, and water-stop mortar 11 is poured on top of the water-stop capsule 10 to complete the water-stopping construction.

[0038] Open ball valve 12 to drain water and create a dry working environment. Fix the engineering steel pipe pile 3 to the reinforced concrete base slab 1 through shear key 16, then remove tension rod 15 and start the construction of the pier cap and pier body.

[0039] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A circular steel structure caisson for construction of bridges in the sea, characterized in that, include: A reinforced concrete base slab (1) and multiple steel caisson sidewall panels (2), wherein the reinforced concrete base slab (1) is fitted onto the erected engineering steel pipe piles (3), and the inner side of the steel caisson sidewall panels (2) is provided with several vertical I-beam main ribs (4) fixedly spaced along the circumference, and the inner side of the steel caisson sidewall panels (2) is provided with several circumferential steel plate stiffening ribs (5) fixedly spaced along the vertical, and the steel caisson sidewall panels (2) are fixedly installed around the reinforced concrete base slab (1) along the circumference, and adjacent steel caisson sidewall panels ( 2) A side wall segmented connecting plate (6) is provided on the inner side of the splicing point. The side wall segmented connecting plate (6) is fixedly connected to the adjacent steel caisson side wall plate (2) by bolts. A side wall guide plate (7) is fixedly provided on one side of each steel caisson side wall plate (2). A side wall double peak waterstop (8) is provided between the side wall guide plate (7) and the outer side of the adjacent steel caisson side wall plate (2). A bottom plate double peak waterstop (9) is provided between the bottom of the steel caisson side wall plate (2) and the reinforced concrete bottom plate (1).

2. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, A water-stop capsule (10) is provided between the engineering steel pipe pile (3) and the reinforced concrete base plate (1). The water-stop capsule (10) is filled with water-stop mortar (11), which fills the gap between the engineering steel pipe pile (3) and the reinforced concrete base plate (1).

3. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, A ball valve (12) is provided at the bottom of the inner side of the steel caisson side wall panel (2).

4. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, The reinforced concrete base slab (1) includes several precast reinforced concrete slabs. A working platform is installed on the engineering steel pipe pile (3). The precast reinforced concrete slabs are set on the working platform. Adjacent precast reinforced concrete slabs are fixedly connected by pouring wet joints.

5. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, A lifting rod (13) is fixedly installed on the outer side of the steel caisson side wall panel (2), and the bottom of the lifting rod (13) is fixedly inserted into the reinforced concrete base plate (1).

6. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, The top of the engineering steel pipe pile (3) is equipped with a cascade lowering system (14), and the lowering end of the cascade lowering system (14) is fixedly connected to the reinforced concrete base plate (1).

7. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, Each of the steel pipe piles (3) is provided with multiple tension rods (15) on the outside, and the bottom of the tension rods (15) is fixedly installed on the reinforced concrete base plate (1).

8. A circular steel structure caisson for offshore bridge construction according to claim 1, characterized in that, Each of the engineering steel pipe piles (3) is provided with several shear keys (16) on its outer side, and the engineering steel pipe piles (3) are fixedly connected to the reinforced concrete base plate (1) through the shear keys (16).

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