Wall protection construction method in highway engineering bridge cast-in-situ bored pile construction

Abstract

The invention belongs to the technical field of building construction, and discloses a wall protection construction method in highway engineering bridge cast-in-situ bored pile construction, which comprises the following steps: preparing chemical wall protection slurry; performing drilling construction by using a rotary drilling rig and adopting a chemical wall protection slurry wall protection; a hole wall cleaning and extruding mechanism is used for cleaning holes for the first time; hole cleaning is conducted through a reverse circulation method, and second-time hole cleaning is conducted with the assistance of high-pressure air; and concrete is poured into the reinforcement cage through a guide pipe method, and the reinforced concrete cast-in-situ bored pile is formed. By using the chemical wall protection slurry, favorable guarantee is provided for construction of the bridge cast-in-situ bored pile in highway engineering, and smooth construction of the bridge cast-in-situ bored pile is guaranteed. By strictly controlling the viscosity and the pH value of the chemical slurry, the wall protection effect can be effectively improved, hole collapse is reduced, meanwhile, the problem that a drill tip or a drill rod is broken is solved, the construction progress and the construction quality are effectively guaranteed, the construction risk is reduced, economic benefits and social benefits are remarkably improved, and the method is suitable for application and popularization.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a wall protection construction method in the construction of bored piles for highway engineering bridges. Background technique [0002] At present, with the continuous development of pile machinery for hole-forming operations, bored piles are widely used in foundation infrastructure projects such as high-rise buildings, highway bridges or large structures. Bored cast-in-place pile refers to a pile made by mechanically drilling holes in the foundation soil at the project site, and pouring concrete into them, or first hanging a steel cage in the holes and then pouring concrete. [0003] As a new type of basic engineering machinery, rotary drilling rigs have been widely used in pile foundation projects such as roads, railways, bridges, water conservancy projects, and urban construction projects after several years of promotion and application. However, due...

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Problems solved by technology

[0006] (1) Existing rotary drilling rigs have high requirements for operators, the drilling speed should not be too fast, the drilling speed should be uniform, and hole collapse occurs from time to time, which greatly delays the construction progress

[0007] (2) The effect of the existing mud wall protection is poor, and the hole collapse is prone to occur when the reinforcement cage is lowered, so that the reinforcement cage is buried in the hole and cannot be pulled out, resulting in large economic losses and difficulties for subsequent construction

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