A bridge foundation construction method for old city reconstruction

Abstract

The invention provides a bridge foundation construction method for old city reconstruction, comprising the following steps: S1, earthwork excavation, hoisting, excavating the pile foundation space for embedding the bridge foundation on the ground of the old city, and placing the earthwork It was hoisted from the inside to the outside. Due to the anchor cable buried under the old city, the earthwork could not be lifted normally. During the excavation of the pile foundation, an additional person fastened the safety belt and stood at the position of the anchor cable to hold the earthwork containing the earthwork. frame, to assist in lifting out the excavated earth and stone, and let the earth frame pass through the side of the anchor cable until the earth and stone are lifted smoothly; S2, install a steel casing, divide a rigid casing into multiple pieces, and assemble them in the pile hole to avoid Open the impact on the anchor cable in the pile; S3, install the reinforcement cage; S4, pour concrete pile foundation, in the case of existing houses around the high slope, when building the foundation of the highway bridge, this application can solve the problem of retaining wall anchor cable and retaining wall The technical problem of the collision between the wall lattice beam and the pile foundation ensures the construction efficiency and construction quality of the bridge foundation.

Description

technical field [0001] The invention relates to the technical field of bridge foundation construction, and in particular relates to a bridge foundation construction method for old city reconstruction. Background technique [0002] During the pile foundation construction of the urban road engineering bridge, when the pile foundation hole was excavated to 18.5 meters, a group of seven steel wire ropes appeared in the hole as a group of gravity anchor cables, located at 1 / 3 of the hole diameter. When digging to 23.4 meters, a group of four steel wire ropes appeared, located at 1 / 2 of the hole diameter. According to the design pile depth requirements, the excavation depth of the pile well should be 29 meters. Carry out urban road bridge construction on high slope, the construction road is impassable, and construction difficulty is particularly large, therefore, urgently needs a kind of advanced technology to solve the technical problem existing in the prior art. Contents of th...

AI Technical Summary

Problems solved by technology

When digging to 23.4 meters, a group of four steel wire ropes appeared, located at 1 / 2 of the hole diameter. According to the design pile depth requirements, the excavation depth of the pile well should be 29 meters. Carrying out urban road and bridge construction on high slopes, the construction road is impassable, and the construction difficulty is particularly great. Therefore, an advanced technology is urgently needed to solve the technical problems existing in the prior art

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