Bridge thin-wall high pier hydraulic slip-form construction method

Abstract

The invention discloses a bridge thin-wall high pier hydraulic slip-form construction method. The method includes the steps that (1) the thickness of concrete poured for the first time ranges from 60cm to 70 cm, the concrete is poured in three layers, and trail lifting can be conducted when the intensity of the concrete in the bottom layer reaches 0.2 MPa to 0.4 MPa; (2) before the concrete is grouted, a layer of 1:1 cement mortar with the thickness between 2 cm and 3 cm should be poured into a formwork, the concrete is peripherally evenly and symmetrically poured into the formwork and vibrated through an immersion vibrator, the vibration direction is changed frequently, a climbing rod and the sliding lift formwork are prevented from being directly vibrated, the immersion depth of the vibrator cannot exceed 50 mm in the concrete in the lower layer, and vibration is stopped in the sliding lift process of the sliding lift formwork; and (3) after initial sliding lift is conducted, the sliding lift formwork is lifted once each time one layer of the concrete is poured, at the normal air temperature, the pouring thickness of each layer of the concrete is 20 cm, and the lifting time doesnot exceed 1 hour. The bridge thin-wall high pier hydraulic slip-form construction method is provided and has the beneficial effects that a pier body is continuously poured to the designed height atone time, the automation degree is high, the speed is high, and work efficiency is high.

Description

technical field [0001] The invention relates to the technical field of sliding form construction of high piers, in particular to a hydraulic sliding form construction method for bridges with thin walls and high piers. Background technique [0002] With the vigorous development of modern construction and modern engineering technology, in the construction of cast-in-place concrete structure engineering, which occupies an extremely important position in civil engineering and construction engineering, the sliding formwork engineering technology has undergone a new change. The technical system of formwork can be divided into: sliding formwork, climbing formwork, lifting formwork, table formwork-flying formwork, tunnel formwork, drawing formwork, large sliding formwork system and early formwork removal system, etc. [0003] Traditional overturning and other construction requires a large number of supports, periodic disassembly and assembly, material costs, labor consumption, slo...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of traditional overturning and other constructions in the above-mentioned prior art that require a large number of supports, periodic disassembly and assembly, material costs, labor consumption, slow construction progress, discontinuous structural integrity and low safety factor. Provide a hydraulic sliding form construction method for thin-walled high piers of bridges with high automation, high speed and high work efficiency by continuously pouring the pier body to the design height at one time

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