A Larsen steel sheet pile cofferdam and its construction method

Abstract

This application relates to a Larsen steel sheet pile cofferdam, including two rows of Larsen steel sheet piles arranged along the width direction of the river, two rows of outer foundation piles parallel to the Larsen steel sheet piles and located outside the two rows of Larsen steel sheet piles, Two rows of inner foundation piles parallel to the Larsen steel sheet piles and located inside the two rows of Larsen steel sheet piles, outer guide rails arranged along the width direction of the river and between the Larsen steel sheet piles and the outer foundation piles, and along the width of the river The direction is set and the inner guide rail frame is located between the Larsen steel sheet pile and the inner foundation pile. The outer guide rail frame and the inner guide rail frame are respectively detachable and installed on the outer foundation pile, the inner foundation pile, and the ends of the two rows of Larsen steel sheet piles Arriving at the river bank, the outer rail frame and the inner rail frame are respectively provided with positioning devices for positioning Larsen steel sheet piles. The application has the effects of reducing construction difficulty and improving construction precision.

Description

technical field [0001] The application relates to the technical field of cofferdams, in particular to a Larsen steel sheet pile cofferdam and a construction method thereof. Background technique [0002] With the development of urban construction, there are more and more river-related projects, such as bridges, culverts, communications across the river, electricity, heat, water supply, and drainage pipelines. Due to the water-passing characteristics of the river, these projects need to divert and drain the river during construction. In the existing technology, the traditional cofferdam is often distorted during the process of driving steel sheet piles, so it is necessary to excavate a pit suitable for the size of the steel sheet piles in advance, and use a ship crane to lift the steel sheet piles into the pit to ensure that the steel sheet piles The pile does not tilt. However, this method has certain defects. If the size of the pre-excavated soil pit is not accurate enough,...

AI Technical Summary

Problems solved by technology

In the existing technology, the traditional cofferdam is often distorted during the process of driving steel sheet piles, so it is necessary to excavate a pit suitable for the size of the steel sheet piles in advance, and use a ship crane to lift the steel sheet piles into the pit to ensure that the steel sheet piles The pile does not tilt. However, this method has certain defects. If the size of the pre-excavated soil pit is not accurate enough, the steel sheet pile cannot be placed in the pit if the pit is too small, and the steel sheet pile will still tilt if the pit is too large. The construction is difficult and the construction accuracy is low

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