Buried construction method for permanent steel protective cylinder externally covering bridge pier column

Abstract

The invention belongs to the technical field of bridge construction, and provides a buried construction method for a permanent steel protective cylinder externally covering a bridge pier column. The buried construction method for the permanent steel protective cylinder externally covering the bridge pier column comprises the steps that, 4-6 layers of plastic thin films are wound around the outer wall of the steel protective cylinder of a bridge pier; measuring sample layout is carried out, and a buried position of the steel protective cylinder of the bridge pier is determined; a rotary drilling rig is put in place and construction guide hole drilling is started; when drilling is carried onto the embedded bottom elevation of the steel protective cylinder in the bridge pier, 50cm of over-drilling downwards is carried out; 100cm of clay is back filled into the bottom of a drilled construction guide hole, and the rotary drilling rig is utilized to reverse to compact of the clay; the steelprotective cylinder of the bridge pier with the outer wall wound with the plastic films is hoisted into the construction guide hole and precisely positioned and then pressed into the clay by50cm; inter-wall concrete is poured in the gap between the steel protective cylinder of the bridge pier and the inner wall surface of the construction guide hole; and after the inter-wall concrete reaches the strength, a drilling-used steel protective cylinder is installed. The buried construction method has the characteristics of strong adaptability, convenient construction and simple process.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method for burying a bridge pier column covered with a permanent steel casing, and is particularly suitable for the method for burying a bridge pier column first and then excavating an exposed permanent steel casing. Background technique [0002] The general steel casing embedding method is to use a vibrating hammer to insert and beat the steel casing. When the vibratory hammer is running, high-frequency vibration is generated under the action of the eccentric hammer. The high-frequency vibration force acts on the steel casing through the hydraulic clamp, and then is transmitted by the steel casing to the stratum in contact with it, so that the contact surface in contact with the stratum generates " liquefaction". Under the action of the exciting force and self-weight, the vibrating hammer holder and the steel casing sink into the ground co...

AI Technical Summary

Problems solved by technology

However, due to uneven geological stratification and boulders, it is difficult to ensure the precise positioning and verticality of the steel casing when the vibratory hammer is inserted into the steel casing, and the steel casing is prone to deformation and damage.

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