Bridge ultra-large diameter pile foundation chambering construction process

Abstract

The invention relates to the technical field of pile foundation construction in extra-large bridge engineering, in particular to a bridge ultra-large diameter pile foundation chambering construction process. In order to achieve the purpose, according to the technical scheme, the bridge ultra-large diameter pile foundation chambering construction process comprises the steps that firstly, a rotary drilling rig is adopted for rapidly constructing and completing a pile foundation with 1 / 2 of a diameter, and then large pile foundation equipment is used for constructing and forming holes according to the diameter of the bridge super-large-diameter pile foundation. The bridge ultra-large diameter pile foundation chambering construction process Simple method disclosed by the invention is simple instructure, scientific in design and convenient to use, firstly, the rotary drilling rig is adopted for quickly constructing the pile foundation with 1 / 2 of the diameter, then the large pile foundation equipment is used for constructing and forming the hole according to the diameter of the super-large pile foundation of a bridge, reaming efficiency is improved, potential safety hazards are reduced, construction progress and safety requirements are effectively met, meanwhile, requirements of construction equipment can be lowered, and construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in super-large bridge engineering, in particular to a construction method for super-large-diameter pile foundations of bridges. Background technique [0002] With the rapid development of expressways in our country, it is inevitable to cross big ditches and rivers in the construction of expressways, and the situation will be more and more. And when crossing big ditches and big rivers, there are more and more opportunities to design extra-large bridges. In the construction of super-large bridges, most of the pile foundations of super-large bridges are super-large-diameter pile foundations, and the diameter of the pile foundations is all greater than 3.0 meters or more. During the construction of ultra-large-diameter pile foundations, due to the large diameter of the pile foundation, the equipment requirements are high, and the construction progress directly affects the bridge ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the construction of super large-diameter pile foundation holes. The traditional pile foundation construction method requires high construction equipment, slow construction efficiency, and large safety hazards with the increase of pile foundation diameter. On-site requirements; in view of the advantages and disadvantages of the traditional pile foundation construction method, in order to meet the construction progress and safety requirements, the construction measures of the super large diameter pile foundation secondary expansion of the bridge were adopted