Bridge pile foundation rotary drilling construction splicing type steel casing structure and installation method thereof

Abstract

The invention discloses a bridge pile foundation rotary drilling construction splicing type steel casing structure and an installation method thereof. The splicing type steel casing structure comprises an upper casing, a lower casing, steel casing reinforcing rings, a steel casing lengthening connecting ring and engagement type anchor bolts. The steel casing reinforcing rings are arranged on an upper port of the upper casing and an upper port of the lower casing respectively. The steel casing lengthening connecting ring is arranged at the position of connection between the upper casing and thelower casing. The multiple engagement type anchor bolts are evenly arranged on the outer side of the lengthening connecting ring, and the upper casing and the lower casing are firmly fixed by the engagement type anchor bolts in an engagement manner. The bridge pile foundation rotary drilling construction splicing type steel casing structure is suitable for construction of bridge pile foundationsin an underground geological environment with much water, or the geological environments with gravels or powder sand layers, and is quick and convenient to install, convenient to disassemble, recyclable and lower in cost. The installation method of the bridge pile foundation rotary drilling construction splicing type steel casing structure is easy to operate; and because the working procedure of slurry supporting is omitted, it is avoided that the environment is polluted by circulating discharged slurry at the same time, environmental protection is achieved, and the practicability is high.

Description

Technical field: [0001] The invention relates to the field of bridge pile foundation construction, in particular to an assembled steel casing structure and an installation method thereof for bridge pile foundation rotary drilling and drilling construction. Background technique: [0002] In the construction of bridges such as pile foundation projects of various bridges (highway, municipal, railway bridges), the mechanical hole-forming process of bored piles is generally used, especially the rotary drilling hole-forming process. The construction method adopts the mud retaining process. Although the rotary drilling drill has fast footage and good hole quality during construction, the construction period of the mud retaining wall is long, which reduces the construction efficiency and the effect of the retaining wall is not ideal, especially in areas that are prone to collapse (gravel, silt layer, cracked soft rock layer), Construction areas with high safety and civilized constr...

AI Technical Summary

Problems solved by technology

Although the rotary drilling drill has fast footage and good hole quality during construction, the construction period of the mud retaining wall is long, which reduces the construction efficiency and the effect of the retaining wall is not ideal, especially in areas that are prone to collapse (gravel, silt layer, cracked soft rock layer), Construction areas with high requirements for safe and civilized construction such as karst caves, underground rivers, and rich groundwater geological environments, as well as urban areas and nature reserves

Although steel casings are used for construction at present, most of them are disposable steel casings, and the construction cost is high

In addition, the engineering industry pays more and more attention to environmental protection. The mud protection process causes a large amount of mud to be discharged, polluting the surrounding environment, and the construction site is dirty, chaotic, and poor, which increases the cost of post-treatment of environmental pollution.

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