Separable pier type cofferdam

A cofferdam and pier type technology is applied in the field of separable pier type cofferdams, which can solve the problems of difficult underwater cutting operations by divers, difficult anticorrosion maintenance of steel cylinders, affecting the service life of structures, etc., and save operation time. , the effect of reducing maintenance workload and costs, and reducing operating costs

Pending Publication Date: 2017-09-05
CCCC FIRST HARBOR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of offshore engineering projects, steel cylinders have been widely used as a temporary cofferdam structure or permanent structure for revetment, but there are two deficiencies in engineering applications of steel cylinders: one is that they are used in artificial islands When the revetment temporary cofferdam is connected with traffic facilities such as tunnels, the steel cylinder needs to be dismantled after the artificial island is completed. The current steel cylinder is designed as a whole, an

Method used

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  • Separable pier type cofferdam
  • Separable pier type cofferdam
  • Separable pier type cofferdam

Examples

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Effect test

Embodiment 1

[0020] Example 1 A separable pier cofferdam, such as figure 1 with figure 2 As shown, it includes a reinforced concrete cylinder 1 and a steel cylinder 2. The reinforced concrete cylinder 1 and the steel cylinder 2 are stacked vertically and coaxially. The reinforced concrete cylinder 1 is located on the steel cylinder 2. The bottom of the reinforced concrete cylinder 1 is provided with a limit water stop structure, and the steel cylinder 2 is inserted into the limit water stop structure.

[0021] The limit water stop structure includes an annular groove provided on the bottom surface of the reinforced concrete cylinder 1 and an annular water stop material 3 provided in the annular groove. The top end of the steel cylinder 2 is inserted into the annular groove, and the annular water stop material 3 is arranged between the steel cylinder 2 and the annular groove, and the annular water-stop material 3 is at least attached to the top surface of the steel cylinder 2 and the top surfa...

Embodiment 2

[0025] Example 2 A separable pier cofferdam, such as figure 1 with image 3 As shown, it includes a reinforced concrete cylinder 1 and a steel cylinder 2. The reinforced concrete cylinder 1 and the steel cylinder 2 are stacked vertically and coaxially. The reinforced concrete cylinder 1 is located on the steel cylinder 2. The bottom of the reinforced concrete cylinder 1 is provided with a limit water stop structure, and the steel cylinder 2 is inserted into the limit water stop structure.

[0026] The limit water stop structure includes an annular step provided on the bottom surface of the reinforced concrete cylinder 1 and an annular water stop material 3 provided in the annular step. The top end of the steel cylinder 2 is inserted into the annular step, and the annular water stop material 3 It is arranged between the steel cylinder 2 and the annular step, and the annular water stop material 3 is at least attached to the top surface of the steel cylinder 2 and the top surface of ...

Embodiment 3

[0030] Example 3 A detachable pier cofferdam, such as figure 1 with Figure 4 As shown, it includes a reinforced concrete cylinder 1 and a steel cylinder 2. The reinforced concrete cylinder 1 and the steel cylinder 2 are stacked vertically and coaxially. The reinforced concrete cylinder 1 is located on the steel cylinder 2. The bottom of the reinforced concrete cylinder 1 is provided with a limit water stop structure, and the steel cylinder 2 is inserted into the limit water stop structure.

[0031] The limit water stop structure includes an annular step provided on the bottom surface of the reinforced concrete cylinder 1 and an annular water stop material 3 provided in the annular step. The top end of the steel cylinder 2 is inserted into the annular step, and the annular water stop material 3 It is arranged between the steel cylinder 2 and the annular step, and the annular water stop material 3 is at least attached to the top surface of the steel cylinder 2 and the top surface ...

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Abstract

The invention relates to a separable pier type cofferdam which comprises a reinforced concrete drum and a steel drum, wherein the reinforced concrete drum and the steel drum are vertically coaxial overlapped; the reinforced concrete drum is located on the steel drum; a limiting water stop structure is arranged at the bottom of the reinforced concrete drum; the steel drum is inserted into the limiting water stop structure. When the cofferdam is used as a shore protection temporary cofferdam structure and an upper section of drum needs to be removed, a hoisting device is directly used for removing, so that the underwater operation is avoided, the operation strength is reduced, the operation time is saved, the operation cost is lowered and the working efficiency is increased. When the separable pier type cofferdam is used as a permanent structure, the reinforced concrete drum located in strong corrosive areas, such as, splash zone and water level fluctuation zone, compared with the steel drum, can effectively promote the durability of the structure and can reduce the later maintenance workload and cost.

Description

Technical field [0001] The invention relates to the technical field of pier type cofferdam structures, in particular to a separable pier type cofferdam. Background technique [0002] In recent years, with the development of offshore engineering projects, steel cylinders have been widely used as a temporary cofferdam structure or permanent structure for bank protection, but steel cylinders have two shortcomings in engineering applications: one is application in artificial islands When the temporary bank protection cofferdam is connected with the tunnel and other transportation facilities, the steel cylinder needs to be removed after the artificial island is completed. The current steel cylinder is designed as a whole, and it is difficult to pull out the entire steel cylinder after it is inserted into the soil. Lower cutting operations are difficult and costly; second, when applied to offshore pier-type permanent structures, steel cylinders have poor durability compared to reinforc...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 李一勇张乃受李增军孙竹
Owner CCCC FIRST HARBOR ENG
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