Construction method of bridge lower structure

Abstract

The invention discloses a construction method of a bridge lower structure. The key point of the technical scheme is that cotton slivers or sealing strips are embedded in the inner sides between adjacent steel sheet piles; c, a triangular water guiding plate is mounted on one side of a guide frame along the direction of water flow; d, a water pump enters a cofferdam for discharging internal accumulated water, concrete layers are poured at the bottoms of the steel sheet piles of the cofferdam; and e, backfilled soil is backfilled to form a foundation pit in the cofferdam, the pit wall which the two sides having slopes is excavated in the cofferdam, gravel layers are backfilled in the slopes, so that the outer sides of the gravel layers are perpendicular to the bottom of the foundation pit, a fender is fixed to the outside of the backfilled soil, column piles are attached to the outer side of the fender, anchor piles are obliquely inserted on both sides of the foundation pit, the anchor piles are connected with the column piles through steel wires, the cofferdam of the bridge is tight in waterproof performance, and construction of the foundation pit at the bottom is more stable.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method for a bridge substructure. Background technique [0002] The construction of bridge foundations includes construction techniques such as open-cut foundations, bored pile foundations, and caisson foundations. In the process of building bridges in rivers, cofferdams can play a certain role in enclosure. Cofferdams are generally Refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate foundation pits, and build buildings. objects, etc., except as a part of the formal building, the cofferdam is generally dismantled after use, but the general cofferdam structure is relatively loose, the impact resistance is not stro...

AI Technical Summary

Problems solved by technology

[0002] The construction of bridge foundations includes construction techniques such as open-cut foundations, bored pile foundations, and caisson foundations. In the process of building bridges in rivers, cofferdams can play a certain role in enclosure. Cofferdams are generally Refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate foundation pits, and build buildings. objects, etc., except as a part of the formal building, the cofferdam is generally dismantled after use, but the general cofferdam structure is relatively loose, the impact resistance is not strong, and the cofferdam built on the turbulent river is subject to greater impact. Therefore, how to build a stable cofferdam on the basis of water and create convenience for the construction of the substructure of the bridge is a difficult problem in bridge construction at present.

Images