Concrete pre-embedded pile for soft foundation reinforcement

Abstract

The invention discloses a concrete pre-embedded pile for soft foundation reinforcement, which belongs to the technical field of pre-embedded pile reinforcement. It is a concrete pre-embedded pile for soft foundation reinforcement. In this scheme, the pre-embedded pile is pre-embedded in soft soil to guide flow Concrete with temperature is poured into the hole, so that the concrete enters the built-in cavity and contacts the cylindrical airbag, so that the ammonium bicarbonate powder in the cylindrical airbag is decomposed by heat and expands, so that the air pressure on the lower side of the cylindrical airbag increases , so that the pre-sealing membrane is cracked, and under the reset action of the elastic telescopic rod, the deformed rubber bag is squeezed toward the outside, and the continuous friction between the contact disc and the spherical air bag makes the calcium bicarbonate in the spherical air bag It is decomposed by heat, and through the friction between it and the quartz sand powder, the spherical air bag continues to expand, and the contact area between the deformed rubber bag and the soil after the overturning is increased, so that the subsidence of the pre-embedded pile can be effectively alleviated.

Description

technical field [0001] The invention relates to the technical field of pre-embedded pile reinforcement, in particular to a concrete pre-embedded pile for soft foundation reinforcement. Background technique [0002] Concrete cast-in-situ pile is a kind of pile made by pouring concrete or reinforced concrete in place. No vibration, no soil compaction, but the settlement of the pile is slightly larger. The auger drilling machine is suitable for cohesive soil, sandy soil and artificial filling soil above the groundwater level. Outside the hole, the hole diameter is about 300mm, and the drilling depth is 8-12m. Select the drill pipe according to the soil quality and water content. To form a hole in the layer, in order to prevent the hole from collapsing, use mud to protect the wall, drill in the clay with clear water, and make the mud to protect the wall; inject the prepared mud into the sand and drill, and use the mud circulation to remove the soil under drilling After drillin...

AI Technical Summary

Problems solved by technology

[0004] At present, concrete pre-embedded piles are pre-buried in soft soil for a long time, and settlement may occur. Therefore, in the prior art, extension plates or extension ribs are usually arranged around the pre-embedded piles to increase the distance between the pre-embedded piles and the soil. The stress-bearing area between them can alleviate the settlement of pre-embedded piles, but it increases the filling time of pre-embedded piles and reduces the work efficiency of technicians

Images