Construction Method of Water Injection Rotary Drilling Bored Pile

Abstract

The invention provides a water injection type rotary drilling construction method for a cast-in-situ bored pile. The construction method comprises following steps: preparation before construction; site formation; surveying and positioning; drilling; pore forming detection; hanging of a steel reinforcement cage; pre-embedment of screws; concrete pouring. The construction method is suitable for construction of the cast-in-situ bored pile in the desert area, the principle of the construction method is focused on a deserted special geological structure, and the sand layer is consolidated through water injection, so that the problems of frequent hole collapse and over-thick sediment in pile foundation construction of a gravel layer in the desert area are solved, and the efficiency of the pile foundation construction is improved. The construction method is simple to operate and convenient to construct, realizes formation of a drill hole prone to hole collapse, can prevent hole collapse and is particularly suitable for construction of a foundation pouring pile for a photovoltaic support in a deserted geological environment, and sediment cleaning is not required.

Description

technical field [0001] The invention relates to a construction method of bored cast-in-situ piles, in particular to a construction method of water-injection rotary-drilled bored-in-situ piles. Background technique [0002] The traditional auger drilling machine is a kind of helical blade drilling machine. The up and down movement of the drill rod is realized through the driving device, and the soil material returns to the ground along the blade during the drilling process. "Qilu Qiangli brand crawler pile driver" is a kind of auger drilling machine, which is mainly suitable for construction in cohesive soil, silty soil and other soil layers. The construction method is to put the drilling rig in place → bury the casing → rotate the drill → rotate the rotary drilling rig → close the drill bit and lock the rotary body of the drilling rig → put down the drill bit → complete the drilling → clean the hole and measure the depth → put in the reinforcement cage and conduit → carry ou...

AI Technical Summary

Problems solved by technology

Although this pile driver is more professional in the field of photovoltaic support pile foundation, due to the poor stability of the sand layer during construction in the geological environment of aeolian sand in the desert area, the soil quality cannot effectively maintain the stability of the hole wall itself with the entry of the drill pipe, which is easy to cause Frequent hole collapse, thick sediment, difficult to clean

Difficulty in reaming and forming holes, great difficulty in pile foundation construction, difficulty in guaranteeing construction quality, waste of labor and resources, affecting construction efficiency of cast-in-place piles, and high maintenance costs

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