All-rotation all-casing drilling machine construction method suitable for karst cave geology

Abstract

The invention discloses a full-rotation full-casing drilling machine construction method suitable for karst cave geology. The method comprises the steps that a site is leveled; the center of a pile position is marked, and the full-rotation all-casing drilling machine is centered in place; a casing pipe is hoisted into a clamping device of the full-rotation full-casing-pipe drilling machine, and the casing pipe is clamped through the clamping device; the full-rotation full-casing drilling machine is used for driving the casing pipe to drill into a pile position soil layer to form a drill hole, and a grab bucket is used for taking soil from the drill hole; when the drilled hole reaches a set depth, a reinforcement cage is installed in the drilled hole; after the reinforcement cage is installed, concrete is poured into the drilled hole to a required depth; and the sleeve is pulled out. According to the method, before the full-rotation full-casing drilling machine is used for construction, accumulated water in a site is pumped out, and a drainage ditch of the site is made; a mud layer, soaked in water, of the site is removed till a hard soil layer is appeared; a layer of roadbed box is paved above a brick slag layer; the flatness of a construction site can be improved, and the bearing capacity of a foundation of the construction site to drilling machine equipment is improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method of a full-rotation casing drilling rig suitable for karst cave geology. Background technique [0002] The cast-in-situ piles constructed by hydraulic full-casing drilling rigs are customarily called Benote piles abroad. The original Benote drilling rig appeared in France in the early 1950s, and was subsequently introduced and developed by Japan, Germany, Britain, Italy and other countries. The research and development, machine types and construction methods have made great progress, and the products are constantly updated. As of December 1997, Japan has produced 770 oscillating full-casing drilling rigs and 433 full-rotary full-casing drilling rigs. According to the survey of 101,000 cast-in-situ piles of 31 construction units conducted by the Japan Infrastructure Construction Association in 1993, the full casing method accounted for 26%. At ...

AI Technical Summary

Problems solved by technology

However, in the actual construction process of the construction method provided by the above-mentioned prior art, if the construction site belongs to karst cave geology, the site is rich in groundwater, and the site is muddy. There are also requirements for the flatness of the site, and pile foundation construction cannot be carried out without relevant treatment

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