Method for forming hole in elastic clay layer by rotary drilling

Abstract

The invention discloses a method for forming a hole in an elastic clay layer by rotary drilling. The method comprises the steps of when encountering an elastic clay layer during the drilling process, stopping the drilling; after the drilling is stopped, lifting up a drilling bucket, and pouring the concrete into a pile hole; inserting a vibrating rod into the elastic clay in the pile hole and the concrete poured in, vibrating and expanding the elastic clay and the concrete so as to seep concrete into the elastic clay and solidify the elastic clay; drilling a rotary drilling machine into the solidified elastic clay again to carry out the hole forming in a mode of dry working clay taking; and lifting up and taking out the clay; and grasping the solidified elastic clay out so as to form the hole in the elastic clay layer. According to the method, the construction process is reasonable, the operation is convenient and practical and the defect of the traditional rotating drilling hole forming technology is overcome; the benefits in four aspects, namely security, working efficiency, quality and cost, are achieved; and the method can be used both in base piles of various buildings, various structures and bridge engineering with improved bearing ability of the base piles, and used in base pit support campshed so as to realize the double functions of soil baffle and water stop.

Description

technical field [0001] The invention belongs to the field of pile foundation hole forming in engineering construction, and in particular relates to a method for drilling holes in rubber soil layer by rotary drilling. Background technique [0002] In complex engineering geology, the site is often a river beach, and the foundation adopts bored piles. At present, when the rubber soil layer lies under the soil layer, the rubber soil is very viscous and the plasticity index is too large, so the construction cannot continue with the rotary drilling drill. , The rotary drilling rig cannot take out the rubber soil, causing the lying rubber soil layer to fail to form a hole, and the drilling machine cannot continue to drill downwards, resulting in giving up halfway. The hole forming of the rubber soil layer is still a difficult problem at home and abroad in construction. Contents of the invention [0003] In order to solve the above technical problems, the object of the present in...

AI Technical Summary

Problems solved by technology

[0002] In complex engineering geology, the site is often a river beach, and the foundation adopts bored piles. At present, when the rubber soil layer lies under the soil layer, the rubber soil is very viscous and the plasticity index is too large, so the construction cannot continue with the rotary drilling drill. , the rotary drilling rig cannot take out the rubber soil, resulting in the inability to form a hole in the lying rubber soil layer, and the drilling rig cannot continue drilling downwards, resulting in a failure