Pore forming technology for sand and gravel layer

Abstract

The invention discloses a pore forming technology for a sand and gravel layer. The technology comprises steps including field measurement, embedment of casings, pore digging, concrete pouring and the like; and during pore digging, a pore digging tool is operated rotationally downwards for pore digging and then is lifted out rotationally after grasping a soil mass. The technology has the beneficial effects as follows: the pore digging tool is operated rotationally downwards or rotationally upwards, and pore walls can be compressed under the effect of rotation of the pore digging tool, so that the fastening degree of the pore walls can be improved, the pore walls can be prevented from collapsing, bulged positions can be pressed in the pore walls, the roundness of the pore walls can be improved, and the pore forming quality is high.

Description

Technical field [0001] The invention relates to the field of bridge construction, in particular, is a process for making holes in a sand and gravel layer. Background technique [0002] During construction, it is often restricted by the site environment, which makes it difficult to construct some construction techniques that are more suitable for the project, resulting in low construction efficiency, increased project cost, and extended construction period, which directly affects project quality and economic benefits. [0003] In the construction of bridge pile foundations, there are often sand and gravel stratums that are difficult to form holes and are prone to accidents when drilling. The drilling of sand and pebble layers has always been a worldwide problem. During the construction of sand and pebble layers, undesirable phenomena such as hole collapse and hole collapse may even occur, and accidents such as stuck drill, buried drill and pile hole collapse may occur. The followin...

AI Technical Summary

Problems solved by technology

These existing construction methods cannot avoid phenomena such as hole collapse