阅读说明：本技术 一种自适应式钢套箱装置 (Self-adaptive steel sleeve box device ) 是由 李明华 任亮 韩雯静 冯佳荟 于 2020-07-27 设计创作，主要内容包括：一种自适应式钢套箱装置,包括上节钢套箱和下节钢套箱。所述上节钢套箱安装在下节钢套箱的上面,由连接螺栓(1)连接固定；所述下节钢套箱由若干个相同长度的单室钢箱体(3)结构相互连接而成；每个单室钢箱体内都有一块在箱体内能上下自由移动的活动壁板(4)；所述活动壁板上端有横截面大于活动壁板的壁板帽(2),下部设有加重块(5),中部设有插销(6)孔；在下节钢套箱设置活动壁板能使侧壁板与河床面无缝接触。将特制的上下两节钢套箱用螺栓连接为整体,用现有常用吊装方法对钢套箱吊装就位施工,解决了长期以来硬质或岩石河床且不平的桥梁水下承台无法采用钢套箱施工的难题,且钢套箱能重复使用,降低了施工成本。(A self-adaptive steel sleeve box device comprises an upper section steel sleeve box and a lower section steel sleeve box. The upper section steel sleeve box is arranged on the lower section steel sleeve box and is fixedly connected by a connecting bolt (1); the lower section steel sleeve box is formed by mutually connecting a plurality of single-chamber steel box bodies (3) with the same length; each single-chamber steel box body is internally provided with a movable wall plate (4) which can freely move up and down in the box body; the upper end of the movable wallboard is provided with a wallboard cap (2) with a cross section larger than that of the movable wallboard, the lower part of the movable wallboard is provided with a weighting block (5), and the middle part of the movable wallboard is provided with a bolt (6) hole; the movable wall plate is arranged on the lower section steel sleeve box, so that the side wall plate can be in seamless contact with the river bed surface. The specially-made upper and lower steel sleeve boxes are connected into a whole by bolts, the steel sleeve boxes are hoisted in place by the conventional hoisting method, the problem that the steel sleeve boxes cannot be used for construction of an underwater bridge bearing platform with a hard or rock riverbed and an uneven bridge for a long time is solved, and the steel sleeve boxes can be reused, so that the construction cost is reduced.)

1. A self-adaptive steel sleeve box device comprises an upper steel sleeve box and a lower steel sleeve box, and is characterized in that the upper steel sleeve box is arranged on the lower steel sleeve box and is fixedly connected by a connecting bolt; the lower section steel sleeve box is formed by mutually connecting a plurality of single-chamber steel box structures with the same length; each single-chamber steel box body is internally provided with a movable wall plate which can freely move up and down in the box body; the upper end of the movable wallboard is provided with a wallboard cap with a cross section larger than that of the movable wallboard, the lower part of the movable wallboard is provided with a weight block, and the middle part of the movable wallboard is provided with a bolt hole; the movable wall plate is arranged on the lower section steel sleeve box, so that the side wall plate can be in seamless contact with the river bed surface.

2. An adaptive steel casing device according to claim 1, wherein the single-compartment steel casing is a rectangular cross-section casing structure formed of double-deck steel plates, and one end of the single-compartment steel casing is closed and the other end is provided with an elongated hole for allowing a movable wall plate to pass through.

3. The adaptive steel sleeve box device as claimed in claim 1, wherein the closed end of the steel box body is provided with screw holes through which bolts are connected with the upper section steel sleeve box.

4. The adaptive steel sleeve box device as claimed in claim 1, wherein the single-chamber steel box bodies are closely connected in parallel in the length direction and are welded into a whole to form the side wall plate of the lower section steel sleeve box.

5. The adaptive steel casing device as claimed in claim 1, wherein the lower end of the single-chamber steel casing body is provided with a bolt hole, and the diameter of the bolt hole is the same as that of the bolt hole on the movable wall plate; so that the movable wall plate is fixed in the single-chamber steel box body through the bolt when the steel box is transported or does not work.

6. The adaptive steel casing device as claimed in claim 1, wherein the length of the movable wall plate is greater than the length of the casing chamber, and the width of the movable wall plate is 0.15-0.3 m; the clearance between adjacent movable wall plates is less than 0.01 m.

7. An adaptive steel casing device according to claim 1, wherein the lower section steel casing structure is determined by the slope of the underwater riverbed surface, and the height of the steel casing is not less than the thickness of the bottom sealing concrete; equal to 2 times the relative maximum height difference of the periphery of the steel pouring jacket.

8. An adaptive steel jacket box assembly according to claim 1, wherein the upper section of steel jacket box is surrounded by side wall plates to form a rectangular box body, and the height is determined by the total height of the steel jacket box minus the height of the lower section of steel jacket box.

9. The adaptive steel sleeve box assembly as recited in claim 1, wherein the single-compartment steel box body is filled with grease lubricant to assist the sliding of the movable wall plate in the single-compartment steel box body.

Technical Field

The invention relates to a self-adaptive steel sleeve box device, and belongs to the technical field of bridges.

Background

The steel pouring jacket is a bottomless steel box-shaped structure with a hollow clamping wall and used for water prevention when a foundation of a water pier is built. Usually prefabricated on shore, and then transported to the pier by floating and sinking to the river bed to a certain depth to form a cofferdam. And after the bridge pier bodies are built out of the water, the steel sleeve box is dismantled so as to be reused.

The steel casing box cofferdam is a cofferdam structure type commonly used in bridge engineering construction, and is mostly used for concrete pouring construction of bridge bearing platforms and part of pier body engineering. The pier bearing platform is suitable for being built at the positions of the river shoal and the river water which are not too deep and have small flow velocity. Generally, the difference between the elevation of the bottom of the bearing platform and the elevation of the surface of the river bed is not large, or the depth of the bottom of the bearing platform embedded into the river bed is shallow, the section size of the bearing platform is not too large, the bottom of the river bed is provided with stratums such as silt, silt or clay, and the like, and the steel casing box can be properly inserted into the river bed for a certain depth.

The steel pouring jacket can bear larger water pressure, and particularly shows superiority under the conditions that certain construction conditions are difficult or are limited by hydrological, topographic and geological conditions and can not adopt envelope structures such as steel sheet piles, island-building cofferdams and the like.

The steel pouring jacket cofferdam is mostly of a single-wall structure similar to a single-wall steel shell. It is mainly composed of wall plate, stiffening rib, inner truss support or bottom plate. The section form is determined by the form of the bearing platform structure, and mainly comprises a rectangle, a square, an eight-diagram shape and the like. The side wall plates and the stiffening ribs are main waterproof structures and bear the water pressure of the outer sides of the cofferdam after water is pumped; the inner truss support is the main stressed structure; the bottom plate is usually not arranged, and when the riverbed is flat and the conditions are appropriate, the bottom plate can be arranged to increase the integral rigidity of the steel sleeve box. The steel boxed cofferdam mostly adopts the method of underwater back cover concrete to block water and stop leakage, and the back cover concrete also bears reverse water pressure. As shown in fig. 4.

When the riverbed is in a hard stratum or even a rock stratum and the surface of the riverbed is uneven or is a slope, the steel jacket box cannot be inserted into the riverbed, and the bottom cannot be in overall contact with the riverbed when the verticality of the steel jacket box is ensured, so that the steel jacket box cannot be used, and the following problems mainly exist: (1) the steel jacket box cannot be self-stabilized. Because the riverbed is uneven, the bottom of the steel sleeve box can only partially stand on the riverbed, and the other steel sleeve boxes are still in a suspended state, so that the steel sleeve box cannot be self-stabilized when the correct position is kept; (2) the back cover cannot be waterproof. Because the periphery of the steel sleeve box cannot be completely contacted with the riverbed to form a closed system, the bottom of the box cannot be filled with underwater concrete for sealing, and the bottom of the box cannot be waterproof; (3) at present, the method for temporarily arranging the plugboard outside the steel jacket box, which is invented by people, has the defects of more underwater operation, high construction difficulty, low efficiency and incapability of realizing repeated use.

Disclosure of Invention

The invention aims to solve the technical problems that in order to enable a steel sleeve box to be automatically suitable for height change on a hard stratum or a rock stratum riverbed and basically realize seamless butt joint, the steel sleeve box can be subjected to underwater concrete bottom sealing construction after being in butt joint with the riverbed surface, and the like, a self-adaptive steel sleeve box device is provided.

The technical scheme of the invention is that the self-adaptive steel sleeve box device comprises an upper section steel sleeve box and a lower section steel sleeve box.

The upper section steel sleeve box is arranged on the lower section steel sleeve box and is fixedly connected by a connecting bolt. The upper steel sleeve box is a rectangular box body surrounded by side wall plates, and the height is determined by subtracting the height of the lower steel sleeve box from the total height of the steel sleeve box.

The lower section steel sleeve box is formed by mutually connecting a plurality of single-chamber steel box structures with the same length; each single-chamber steel box body is internally provided with a movable wall plate which can freely move up and down in the box body; the upper end of the movable wallboard is provided with a wallboard cap with a cross section larger than that of the movable wallboard, the lower part of the movable wallboard is provided with a weight block, and the middle part of the movable wallboard is provided with a bolt hole; the movable wall plate is arranged on the lower section steel sleeve box, so that the side wall plate can be in seamless contact with the bottom of the river bed.

The single-chamber steel box body is of a box chamber structure which is composed of double-layer steel plates and has a rectangular cross section, one end of the single-chamber steel box body is closed, and the other end of the single-chamber steel box body is provided with a strip-shaped hole for allowing the movable wall plate to pass through.

The closed end of the steel box body is provided with a screw hole, and the connecting bolt is connected with the upper section steel sleeve box through the screw hole.

The single-chamber steel box bodies are closely connected in parallel in the length direction and are welded into a whole to form a side wall plate of the lower section steel sleeve box.

The lower end of the single-chamber steel box body is provided with a bolt hole, and the diameter of the bolt hole is the same as that of the bolt hole on the movable wall plate; so that the movable wall plate is fixed in the single-chamber steel box body through the bolt when the steel box is transported or does not work.

The length of the movable wall plate is greater than that of the box chamber, and the width of the movable wall plate is 0.15-0.3 m; the clearance between adjacent movable wall plates is less than 0.01 m.

The lower section steel jacket box structure is determined by the slope of the underwater riverbed surface, and the height of the steel jacket box is not less than the thickness of the bottom sealing concrete; equal to 2 times the relative maximum height difference of the periphery of the steel pouring jacket.

The invention has the advantages that the invention does not change the existing construction conditions and requirements, does not change the existing construction method, only needs to measure and clean the riverbed which is the accessory of the bridge bearing platform in advance, connects the specially-made upper and lower two sections of steel sleeve boxes into a whole by using the bolt, and uses the existing common hoisting method to hoist the steel sleeve boxes in place for construction, thereby improving the safety of the engineering, having convenient operation, less supporting equipment and easy acceptance of constructors, and being capable of operating skillfully.

The device solves the problem that the rigid or rock riverbed uneven bridge underwater bearing platform cannot be constructed by the steel sleeve box for a long time, and the steel sleeve box can be repeatedly used, thereby reducing the construction cost. With the increasing quantity of deep-water bridges in rivers and even seas, the demand of the self-adaptive steel pouring jacket is increased continuously, and the application of the self-adaptive steel pouring jacket creates great economic benefit for bridge construction.

The device is suitable for the situation that the underwater bearing platform of the bridge on the hard or rock geology and the slope riverbed surface needs to adopt the cofferdam for drainage construction, enlarges the application range of the steel sleeve box, and particularly the self-adaptive device is convenient to use and high in efficiency.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention;

FIG. 2 is a schematic structural diagram of a lower section steel jacket box;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic structural view of a conventional steel jacket box;

in the figure: 1. is a connecting bolt; 2. is a wallboard cap; 3. is a single-chamber steel box body; 4. is a movable wall plate; 5. is a weighting block; 6. is a latch.

Detailed Description

The self-adaptive steel jacket box device comprises an upper steel jacket box and a lower steel jacket box, and is shown in fig. 1.

The upper section steel sleeve box is arranged on the lower section steel sleeve box and is fixedly connected by a connecting bolt 1. The upper steel sleeve box is a rectangular box body surrounded by side wall plates, and the height is determined by subtracting the height of the lower steel sleeve box from the total height of the steel sleeve box.

As shown in FIGS. 3 and 4, the lower steel pouring jacket of the embodiment is formed by connecting a plurality of single-chamber steel box bodies 3 with the same length; each single-chamber steel box body is internally provided with a movable wall plate 4 which can freely move up and down in the box body; the upper end of the movable wallboard is provided with a wallboard cap 2 with a cross section larger than that of the movable wallboard, the lower part of the movable wallboard is provided with a weight block 5, and the middle part of the movable wallboard is provided with a bolt hole; the movable wall plate is arranged on the lower section steel sleeve box, so that the side wall plate can be in seamless contact with the bottom of the river bed.

In the embodiment, the lower end of the single-chamber steel box body is provided with a bolt hole, and the diameter of the bolt hole is the same as that of the bolt hole on the movable wall plate; so that the movable wall plate is fixed in the single-chamber steel box body through the bolt 6 when the steel box is transported or does not work.

When the device is constructed, firstly, a temporary hoisting system is arranged on a working platform, a hoisting machine is used for hoisting an upper integral steel jacket box and a lower integral steel jacket box which are connected, the bolts 6 on the movable side wall plates 4 are pulled out block by block to enable the movable side wall plates to be in a working state, the integrity and the flexibility of the movable side wall plates are checked, then the steel jacket boxes are slowly placed at a bridge foundation where a river bed is cleaned, after all the side wall plates are placed on a river bed surface, the positions of the steel jacket boxes are finely adjusted by tools such as chain blocks, after the steel jacket boxes are in place, the steel jacket boxes are fixed on the hoisting system, a plurality of guide pipes are adopted for filling underwater concrete bottom seals, and the height of the bottom seals is slightly lower than the connecting positions of the upper steel jacket box and.

After the bottom sealing underwater concrete reaches the strength, the steel sleeve box is basically stable, water can be pumped in the steel sleeve box, the internal support condition in the box is checked during water pumping, whether buoyancy exists or not is evaluated, and the integral stability and firmness of the steel sleeve box are ensured.

And after the water pumping and the inner support inspection are finished, constructing the bearing platform and the pier body until the pier body goes out of the water surface.

After the construction of the bearing platform or the construction of the pier body is out of the water surface, water can be injected into the steel sleeve box, so that the water pressure inside and outside the steel sleeve box is balanced, and the related inner supports are removed while water is injected until the water pressure inside and outside the box is balanced. Because the movable wall plate is extruded when the bottom sealing underwater concrete is poured, the movable wall plate slightly expands outwards, which is beneficial to upward dismantling of the whole steel pouring jacket, and the dismantled steel pouring jacket can be reused.

After the steel sleeve box is dismantled, the movable side wall plates are pushed into the box body block by block, and the bolts are inserted, so that the movable side wall plates can be stored and transported.

Before the bottom sealing concrete is poured, the riverbed is cleaned and disposed, and the underwater concrete is ensured to be closely contacted with the riverbed surface, so that buoyancy generated after the steel jacket box pumps water is avoided. In actual construction, the corresponding plan for overcoming the buoyancy is also needed to be researched.