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Construction method of steel plate pile cofferdam concrete sealed bottom

A technology of steel sheet pile cofferdam and construction method, which is applied in the direction of basic structure engineering, construction, etc., can solve problems such as engineering accidents, hidden dangers in the quality of back cover concrete, and easy inclusion of sediment, so as to speed up the construction progress, reduce the construction period, and the construction method simple effect

Inactive Publication Date: 2017-06-09
CHINA RAILWAY 23RD BUREAU GRP NO 1 ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the construction process, it was discovered that there are certain problems and risks in the construction method of the underwater bottom sealing of the steel sheet pile cofferdam, especially when it is applied in sandy riverbed or river water, it may easily cause the concrete to be easily mixed with sand. Potential hidden dangers and engineering accidents caused by back-sealing concrete

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  • Construction method of steel plate pile cofferdam concrete sealed bottom
  • Construction method of steel plate pile cofferdam concrete sealed bottom
  • Construction method of steel plate pile cofferdam concrete sealed bottom

Examples

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Embodiment 1

[0030] The construction method of the concrete back cover of the 115# pier of a Yellow River Highway Bridge:

[0031] (1) Foundation construction: According to the area of ​​the steel sheet pile cofferdam, it is roughly divided into 20 areas according to 4.8*5.28m (such as figure 1 shown), the excavation point is set at the center of each partition, the mud pump is mainly used to absorb mud, and the underwater excavation of the long-arm excavator is supplemented. Mainly measure, supplemented by the method of underwater inspection for elevation detection, stop after meeting the design base elevation, and form the base;

[0032] (2) Cushion construction: Lay a gravel cushion with a thickness of about 20cm in the base;

[0033] (3) Back cover construction: Arrange the back cover conduits according to the partitions (such as figure 2 As shown), two groups of conduits are used for symmetrical concrete pouring construction. After pouring in the short side direction, it is moved t...

Embodiment 2

[0035] The construction method of the concrete back cover of the 109# pier of a Yellow River Highway Bridge:

[0036] (1) Foundation construction: According to the area of ​​the steel sheet pile cofferdam, it is roughly divided into 20 areas according to 4.8*5.28m. The excavation point is set at the center of each area. The mud pump is mainly used to absorb mud. Excavation is supplemented by underwater excavation of the foundation pit in each area, and the measurement above the water surface is mainly used, supplemented by the method of underwater inspection for elevation detection, and stops after meeting the design base elevation to form the base;

[0037] (2) Cushion construction: Lay a gravel cushion with a thickness of about 15cm in the base;

[0038] (3) Back cover construction: Arrange the back cover conduits according to the partitions, use a single set of conduit concrete pouring construction, use the short side direction to pour and then move to the long side directi...

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Abstract

The invention discloses a construction method for the concrete bottom sealing of a steel sheet pile cofferdam, including (1) base construction: partitioning is carried out according to the area of ​​the steel sheet pile cofferdam, and each area is excavated and tested for its elevation, and after conforming to the design base elevation Stop to form the base; (2) Cushion construction: Lay gravel cushion in the base; (3) Back cover construction: Arrange the back cover ducts according to the partitions, and carry out concrete pouring through the back cover ducts, and at the same time check the elevation until it conforms to the design Stop after the back cover elevation; this construction method avoids the inclusion of sediment and concrete by adding cushion construction and adjusting the concrete pouring sequence, thereby improving the strength of the back cover concrete and ensuring the quality of the project.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a construction method for concrete bottom sealing of a steel sheet pile cofferdam. Background technique [0002] At present, the construction method of steel sheet pile cofferdam underwater bottom sealing has been widely used in bridge engineering technology due to its advantages of fast speed, small workload, low cost and strong adaptability, which has brought great benefits to the rapid construction and construction of road bridges. Many benefits. However, during the construction process, it was discovered that there are certain problems and risks in the construction method of the underwater bottom sealing of the steel sheet pile cofferdam, especially when it is applied in sandy riverbed or river water, it may easily cause the concrete to be easily mixed with sand. Cause the hidden danger of the quality of back cover concrete and engineering accident. ...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 潘国安王春堂许广利李红金
Owner CHINA RAILWAY 23RD BUREAU GRP NO 1 ENG