Pouring construction process for bridge pier through concrete conduit method

Abstract

The invention discloses a pouring construction process for a bridge pier through a concrete conduit method and relates to pouring construction processes for underground bridge piers through the concrete conduit method. The process mainly aims to solve the problems of low efficiency and the like as a result of two times of construction of a pile body and a pier currently. According to the process,firstly, cut-pile elevation of a bridge pile foundation is raised to the bottom of a bent cap or an abutment, and then a construction platform is filled, wherein the elevation of the construction platform is consistent with the new cut-pile elevation; after platform filling is completed, a steel casing is inserted and driven into a pile position, and next a construction pile foundation is poured according to the conduit method, wherein steel bars in pier height are arranged according to pier steel bars; the steel casing is pulled out after concrete is poured to the top face of the steel casing, and two theodolites are used for recording a plane position when the casing is pulled out; the pier casing is inserted again according to the recorded position, and concrete is supplemented again tothe bottom of the bent cap or the abutment; and after the concrete meets the strength requirement, a soil body within the height range of the pier is excavated, the pier casing is dismantled, and thepier concrete is maintained. The process has the advantages that the construction period is short, and construction cost is low.

Description

Technical field: [0001] The invention relates to a construction technique for concrete pouring of bridge pier columns under the ground by conduit method. Background technique: [0002] At present, in the construction of bridge pier columns, generally after the construction of the bridge pile foundation, the foundation pit is excavated, the enclosure structure is made, the pile head construction is removed, and finally the reinforced concrete structure construction of the pier column is carried out. In this way, the pile body and the pier column are constructed twice, and the construction efficiency is obviously reduced. Simultaneously, the excavation of the foundation pit and the removal of the pile head are complicated, difficult to operate, and the construction difficulty is large. [0003] In addition, destructive cutting is currently used to remove the pier column casing, so that not only the casing cannot be reused, but also the concrete surface will be polluted and dam...

AI Technical Summary

Problems solved by technology

In this way, the pile body and pier column are constructed twice, and the construction efficiency is significantly reduced. At the same time, the excavation of the foundation pit and the removal of the pile head are complicated and difficult to operate, making the construction difficult.

[0003] In addition, destructive cutting is currently used to remove the pier column casing, so that not only the casing cannot be reused, but also the concrete surface will be polluted and damaged due to the cutting effect, which is not conducive to the control of construction cost and quality

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