Cast-in-situ pile casing and its construction method

Abstract

The invention discloses a cast-in-place pile sleeve tube and a construction method of the cast-in-place pile sleeve tube. The cast-in-place pile sleeve tube comprises a first tube body, a second tube body, a plurality of valve pieces and a rope body, wherein the first tube body is hollow, openings are formed in the two ends of the first tube body, the second tube body is sleeved with the first tube body, the valve pieces are in rotatable linkage at the lower end of the second tube body, one end of the rope body is in movable linkage to the valve pieces, and the other end of the rope body extends out of the upper end of the second tube body. The construction method comprises the steps of cleaning a place, injecting the cast-in-place pile sleeve tube, closing the valve pieces through the rope body, pulling out the second tube body, placing a reinforcement cage, pouring concrete, pulling out of the first tube body and the like. According to the cast-in-place pile sleeve tube and the construction method, the soil compaction effect of a traditional cast-in-place pile can be greatly reduced, and damage caused by the soil compaction effect is reduced. Meanwhile, due to the fact that the cast-in-place pile is a soil-taking pile, the cast-in-place pile sleeve tube has the advantages that the pile sinking resistance is small, and holes are easily formed.

Description

technical field [0001] The invention relates to cast-in-place piles, in particular to a cast-in-place pile casing and a construction method. Background technique [0002] In pile foundation engineering, immersed pipe grouting piles have the advantages of high bearing capacity, wide range of applicable strata and free change of pile length, etc., and are widely used. Existing sinking pipe piles use hammering pile driving equipment or static pressure and vibration pile sinking equipment to sink piles with reinforced concrete or steel pipes into the soil to form pile holes, then put steel reinforcement skeletons and pour concrete, and then The casing is pulled out, and the concrete is compacted by the vibration during the pulling out to form the required cast-in-place pile. [0003] Compared with ordinary bored piles, immersed tube piles avoid the problems of pile sinking and insufficient holding force caused by floating soil at the tip of ordinary bored piles, and also effect...

AI Technical Summary

Problems solved by technology

[0004] However, because it is a soil-squeezing pile, the piles poured in advance are prone to inclined fracture or even dislocation due to the soil-squeezing effect, which greatly affects the quality of the pile body

In addition, there is also the defect that the pile sinking resistance is relatively large and the pile sinking is difficult

Images