CN219604389U

CN219604389U - Novel open caisson structure

Info

Publication number: CN219604389U
Application number: CN202320198203.0U
Authority: CN
Inventors: 周炜峙; 孙安; 陈位洪
Original assignee: Architectural Design and Research Institute of Guangdong Province
Current assignee: Architectural Design and Research Institute of Guangdong Province
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-08-29
Anticipated expiration: 2033-02-13

Abstract

The utility model provides a novel open caisson structure, which comprises an open caisson main body, wherein the open caisson main body is formed by welding a plurality of steel pipe joints with the same diameter up and down, an underwater bottom sealing concrete block is arranged at the bottom of the open caisson main body, an arc-shaped steel plate is welded on the inner wall of the open caisson main body above the underwater bottom sealing concrete block, a concrete bottom plate is poured above the underwater bottom sealing concrete block, and the arc-shaped steel plate is embedded in the concrete bottom plate. The novel open caisson structure uses welded steel pipe joint as open caisson main part, under the same intensity condition, the steel pipe wall thickness is thinner, is concrete wall thickness 5% -10% generally, can save wall thickness space, and steel pipe joint length can be long or short according to actual need, and is not high to ground clear height requirement, need not commercial concrete pumping car on the spot, and is not high to the field requirement, and steel pipe welding construction speed is faster in addition, and the welding finishes and makes anticorrosive can sink, need not too long latency.

Description

Novel open caisson structure

Technical Field

The utility model relates to the technical field of building construction, in particular to a novel open caisson structure.

Background

Open caisson has been used in many projects as a construction method for an underground structure or a foundation pit supporting method. The existing open caisson method is to pour reinforced concrete joints on the ground, then excavate soil in the open caisson, sink in place by utilizing the self weight of the open caisson, and then pour concrete back cover, the structure of the open caisson is as shown in fig. 1, the main structural body of the open caisson mainly comprises a first open caisson joint 100 and a second open caisson joint 200, the open caisson joint is generally a concrete cylinder with the wall thickness of 300 mm-1000 mm, in addition, in order to ensure stable up-down butt joint between the first open caisson joint 100 and the second open caisson joint 200, a clamping groove 300 structure is required to be arranged between the top surface of the first open caisson joint 100 and the second open caisson joint 200, so that processing is difficult, then a concrete block 500 with a reinforcing steel bar net 600 is required to be paved on the concrete block 500, in order to ensure stable position of the concrete block 400, a limit groove is required to be arranged on the inner wall of the first open caisson joint 100, so that the structure of the first open caisson joint 100 is difficult to process, once assembly is difficult, loosening of the concrete block 400 is easy, and poor tightness of the bottom of the open caisson joint is caused.

Moreover, the open caisson of this structure has mainly the following drawbacks: firstly, the occupied space is large, particularly when a plurality of pipelines exist at the periphery, the problems that the pipelines are difficult to sink or need to be changed exist, and the like, the open caisson is formed by casting 3-6 m high on the ground at one time, and the open caisson has requirements on the clean height of the field. Secondly, the construction period is long, and the sinking can be performed after the concrete strength reaches a certain degree for a long time after each section of open caisson is poured. Thirdly, the manufacturing cost and the construction cost are large.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a novel open caisson structure, a welded steel pipe joint is used as an open caisson main body, the wall thickness of a steel pipe is thinner under the condition of the same strength, the wall thickness of concrete is 5% -10%, the wall thickness space can be saved, the length of the steel pipe joint can be long or short according to actual needs, the requirement on the ground clear height is not high, a commercial concrete pumping truck is not needed on site, the requirement on the site is not high, the welding construction speed of the steel pipe is higher, the steel pipe can sink after being welded, and the long waiting time is not needed.

In order to achieve the technical scheme, the utility model provides a novel open caisson structure, which comprises the following components: the open caisson body is formed by welding a plurality of steel pipe joints with the same diameter up and down, an underwater bottom sealing concrete block is arranged at the bottom of the open caisson body, an arc-shaped steel plate is welded on the inner wall of the open caisson body above the underwater bottom sealing concrete block, a concrete bottom plate is poured above the underwater bottom sealing concrete block, and the arc-shaped steel plate is embedded in the concrete bottom plate.

In the technical scheme, during actual construction, only the bottommost steel pipe joint is placed in the excavated cavity, then other steel pipe joints are welded up layer by layer in a welding mode, the welding construction speed between the steel pipe joints is high, waiting for concrete solidification time is not needed, the construction period is shortened, the steel pipe cost is lower, recycling is achieved when necessary, recycling economy is achieved, and the steel pipe is low-carbon and environment-friendly. Simultaneously through welding the arc steel sheet on the open caisson main part inner wall, concrete bottom plate is pour under water back cover concrete piece top to with the mode of arc steel sheet embedding in the concrete bottom plate can ensure that concrete bottom plate and the steel pipe tube coupling of open caisson main part bottom are connected stably, and the setting of arc steel sheet is fine has played shearing resistance, fixed bottom plate, has strengthened the effect of wholeness between bottom plate and the steel pipe.

Preferably, two reserved gaps are symmetrically arranged at the welding positions of the arc-shaped steel plates and the inner wall of the open caisson main body, so that the concrete bottom plate is poured after reinforcing steel bars are placed during actual construction conveniently.

Preferably, the concrete bottom plate is internally provided with crisscrossed reinforcing steel bar meshes, which play a role in reinforcing the strength of the concrete bottom plate.

Preferably, butter is smeared on the inner surface and the outer surface of a steel pipe joint in the open caisson main body, so that the energy-saving sinking of the steel pipe in the open caisson main body is ensured.

Preferably, the wall thickness of the steel pipe joint in the open caisson main body is 15-100mm, compared with the traditional concrete open caisson, the wall thickness of the open caisson main body is greatly reduced, the occupied space of the open caisson main body can be reduced, and the requirements on the field are reduced.

The novel open caisson structure provided by the utility model has the beneficial effects that: the novel open caisson structure is reasonable in design, simple structure, the construction is easy, traditional concrete construction structure has been replaced, use welded steel pipe tube coupling as the open caisson main part, under the equal intensity condition, the steel pipe wall thickness is thinner, be concrete wall thickness 5% -10% generally, wall thickness space can be saved, and steel pipe tube coupling length can be long according to actual need, the requirement on ground clearance is not high, on-the-spot need not commercial concrete pumping car, the requirement on the place is not high, in addition, steel pipe welding construction speed is faster, the anticorrosion can be sunk after the welding is done, need not too long latency, but also the steel pipe cost is lower if necessary recycle, economic benefits is good, and through welding the arc steel sheet on the open caisson main part inner wall, concrete bottom plate pours in the bottom sealing concrete piece top under water, and the mode of embedding the arc steel sheet in concrete bottom plate, can ensure that concrete bottom plate and the steel pipe tube coupling of open caisson main part bottom is connected stably, prevent concrete bottom plate from becoming flexible.

Drawings

Fig. 1 is a schematic structural view of a conventional open caisson.

Fig. 2 is a schematic structural view of the present utility model.

Fig. 3 is a top view of the present utility model.

In the figure: 1. a caisson body; 2. arc-shaped steel plates; 3. a concrete floor; 4. reinforcing steel bar net; 5. an underwater bottom sealing concrete block; 6. welding seams; 7. and reserving a gap.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present utility model.

Examples: a novel open caisson structure.

Referring to fig. 1 to 3, a novel open caisson structure comprises: the open caisson body 1, the open caisson body 1 is formed by welding a plurality of steel pipe joints with the same diameter up and down, the bottom of the open caisson body 1 is provided with an underwater bottom sealing concrete block 3, an arc steel plate 2 is welded on the inner wall of the open caisson body 1 above the underwater bottom sealing concrete block 5, a concrete bottom plate 3 is poured above the underwater bottom sealing concrete block 5, the arc steel plate 2 is embedded in the concrete bottom plate 3, the arc steel plate 2 well plays the roles of shearing resistance, the concrete bottom plate 3, reinforcing the integrity between the concrete bottom plate 3 and the steel pipe joints in the open caisson body 1, the connection stability of the concrete bottom plate 3 and the steel pipe joints at the bottom of the open caisson body 1 can be ensured, the looseness of the concrete bottom plate 3 is prevented, and the tightness of the bottom of the open caisson is enhanced;

in this embodiment, the concrete bottom plate 3 is internally provided with criss-cross reinforcing steel bar meshes 4, which play a role in reinforcing the strength of the concrete bottom plate 3. Two reserved gaps 7 are symmetrically arranged at the welding position of the arc-shaped steel plate 2 and the inner wall of the open caisson main body 1, so that the concrete bottom plate 3 is poured after reinforcing steel bars are placed during actual construction. Butter is smeared on the inner surface and the outer surface of the steel pipe joint in the open caisson main body 1, so that the steel pipe in the open caisson main body 1 can be sunk in place in an energy-saving manner. The wall thickness of the steel pipe joint in the open caisson body 1 is 15-100mm, compared with the traditional concrete open caisson, the wall thickness of the open caisson body 1 is greatly reduced, the occupied space of the open caisson body 1 can be reduced, and the requirements on the field are reduced.

The novel open caisson structure is reasonable in design, the novel open caisson structure is simple in structure and easy to construct, the traditional concrete construction structure is replaced, the welded steel pipe joint is used as the open caisson main body, under the condition of the same strength, the steel pipe wall thickness is thinner, the concrete wall thickness is 5% -10%, wall thickness space can be saved, the length of the steel pipe joint can be long or short according to actual needs, the requirement on the ground clearance is not high, a commercial concrete pumping truck is not needed on site, the requirement on the site is not high, the welding construction speed of the steel pipe is high, corrosion resistance can be achieved after the welding is finished, the long waiting time is not needed, the steel pipe cost is low, recycling is achieved if necessary, economic benefit is good, and the concrete bottom plate 3 is poured above the underwater bottom sealing concrete block 5 through the mode of embedding the arc steel plate 2 in the concrete bottom plate 3, the concrete bottom plate 3 can be ensured, the concrete bottom plate 3 and the steel pipe joint at the bottom of the open caisson main body 1 is stably connected, the tightness of the bottom of the open caisson is prevented.

The foregoing is a preferred embodiment of the present utility model, but the present utility model should not be limited to the embodiment and the disclosure of the drawings, so that the equivalents and modifications can be made without departing from the spirit of the disclosure.

Claims

1. The utility model provides a novel open caisson structure, includes open caisson main part, its characterized in that: the open caisson body is formed by welding a plurality of steel pipe joints with the same diameter up and down, the bottom of the open caisson body is provided with an underwater bottom sealing concrete block, an arc-shaped steel plate is welded on the inner wall of the open caisson body above the underwater bottom sealing concrete block, a concrete bottom plate is poured above the underwater bottom sealing concrete block, and the arc-shaped steel plate is embedded in the concrete bottom plate.

2. A novel open caisson structure according to claim 1, characterized in that: two reserved gaps are symmetrically arranged at the welding part of the arc-shaped steel plate and the inner wall of the open caisson main body.

3. A novel open caisson structure according to claim 1, characterized in that: and reinforcing steel bar meshes which are crisscrossed vertically and horizontally are arranged in the concrete bottom plate.

4. A novel open caisson structure according to claim 1, characterized in that: butter is smeared on the inner surface and the outer surface of a steel pipe joint in the open caisson main body.

5. A novel open caisson structure according to claim 1, characterized in that: the wall thickness of the steel pipe joint in the open caisson main body is 15-100mm.