Combined cofferdam under complex geological condition and construction method thereof

Abstract

The invention discloses a combined cofferdam under the complex geological condition and a construction method thereof. The combined cofferdam is characterized in that a concrete antiskid pile section and a locking steel pipe pile section are arranged in the whole cofferdam by sections; and a front end concrete antiskid pile and a tail concrete antiskid pile in the concrete antiskid pile section are respectively connected with a tail locking steel pipe pile and a front end locking steel pipe pile in the locking steel pipe pile section to form the whole sealed cofferdam. The cofferdam under the complex geological condition has clear structural stress, firm structure, good water stopping effect and simpler construction method and can effectively protect basic construction quality.

Description

technical field [0001] The invention relates to a cofferdam under complex geological conditions and a construction method thereof, more specifically a cofferdam with relatively complicated stress, relatively large rock surface fluctuations, and simultaneously covering land and water, and a construction method thereof. Background technique [0002] In some engineering constructions, often for foundation construction, it is first necessary to form a closed cofferdam at the construction location, so that the inside of the cofferdam is a water-poor or dry area, so that the subsequent foundation construction can proceed normally. [0003] The current cofferdam structure usually has two forms, one is a cofferdam formed by rows of concrete piles, which is mainly suitable for land, and the rock layer is higher; the other is a cofferdam formed by locking steel pipe piles The connection is formed in the form of a mouth, which is mainly suitable for water and has a certain thickness of...

AI Technical Summary

Problems solved by technology

However, in some construction situations, the geological conditions and the force of the weir body are relatively complex, and the cofferdam area has both land and water. In this case, a single form of cofferdam cannot meet the construction requirements, so that the cofferdam structure is not stable enough. Construction is difficult

[0004] For example, for the Shuangyong Bridge in Liuzhou City, Guangxi, half of the 22# main tower cap is located in the water and half is located on the shore, and the rock level at the cofferdam has large fluctuations, so it is impossible to carry out construction of a single cofferdam in the existing structure

Aiming at the shallow water foundation of this bad geological condition and special geographical location, there is no public report of a cofferdam with a specific structure related to it in the prior art

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