Explosion-enlarging stake construction process

Abstract

The invention relates to a method for constructing explosive-forming pile, which comprises: first, digging one horn well mouth at the soil; then at the center of well mouth, downwards drilling vertical tile hole to preset depth; arranging integrated drug pack into hole bottom; arranging sleeve at the center of borehole; filling bar drug pack into sleeve; filling mixed concrete or cement sand pulp between the borehole and sleeve; covering steel plate at the open of borehole; stacking carrier matter on the steel plate; exploding the drug pack and bar drug pack, after 3-8 hours when the filled concrete or cement sand pulp are poured, to form tile post and tile head with concrete protective layer; pouring concrete into tile head and tile post to form explosive-forming pile. The invention has simple process and better forming effect without reducing radius and sink hole.

Description

technical field [0001] The invention relates to a construction technique for blasting and expanding piles, which is especially suitable for pile foundation construction in cohesive soil, and also suitable for pile foundation construction in loose soil layer and pile foundation construction under complex terrain conditions. Background technique [0002] It is a well-known technology at home and abroad to use the explosive energy of explosives to extrude the soil in the compressible soil layer to form the foundation of the detonation-expanded pile. The traditional blasting and expanding pile foundation technology is to use manual or mechanical methods to drill the blasthole at the place where the foundation is to be built. The ring-shaped charge bag is detonated to form a pot-shaped pile head, and finally concrete is poured or steel bars are laid in the hole to form a pile foundation. This explosion-expanding pile technology is prone to problems such as collapse and necking o...

AI Technical Summary

Problems solved by technology

This kind of explosive expansion pile technology is very prone to problems such as pile hole wall collapse and necking during the construction process. The soil cracks develop and the amount of rebound is large, which not only results in poor pile forming quality, but also greatly affects the bearing capacity of the pile foundation. force, even cannot meet the design requirements

In addition, piles and pile heads are usually exploded and expanded twice, and the pile head exploded later not only affects the stability of the soil around the first blasted pile, but also the construction technology is more complicated

Images