Construction method and anti-collapse hole device for rotary digging piles

Abstract

The invention relates to a hole collapse preventing construction method for a spun-digging pile and a hole collapse preventing device. The construction method comprises the following steps: constructing the spun-digging pile at a set position; when the spun-digging pile is constructed to a region where hole collapse is easily caused, excavating by a set distance towards the region where hole collapse is easily caused; providing a barrel of which the outer diameter is smaller than the aperture of the spun-digging pile; placing the barrel into the spun-digging pile, placing the bottom of the barrel in the region where hole collapse is easily caused, and forming an annular gap between the periphery of the barrel and the side wall of the spun-digging pile; pouring concrete in the annular gap so as to form a protecting wall structure on the side wall of the spun-digging pile; taking out the barrel from the inside of the spun-digging pile, continuing downwards excavating the spun-digging pile by a set distance, placing the barrel in the spun-digging pile again, and pouring concrete to form a new protecting wall structure, and repeating the step until the spun-digging pile passes throughthe region where hole collapse is easily caused; and excavating the spun-digging pile until construction of the spun-digging pile is finished.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for anti-collapse holes of rotary digging piles and an anti-collapse hole device. Background technique [0002] Rotary excavation pile generally refers to the pile type constructed by rotary drilling rig, the full name is rotary excavation bored pile, and it is referred to as rotary excavation pile in engineering. Due to the use of mechanical operations, the requirement for the number of workers is not high, which can save a lot of labor costs. After the rotary excavator drills holes, under the geological conditions of high water level and water-rich sand layers, it is easy to cause problems such as low porosity, diameter shrinkage, slag inclusion, and excessive sediment at the bottom of the pile. The water-rich sand layer has a sand content of more than 30%, a large void ratio, a large water content, and has the characteristics of high fluidity, low be...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a construction method and an anti-slump hole device for rotary excavation piles, and solve the problems of wasting concrete and low construction efficiency in the prior art

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