Cast-in-place pile construction method by adopting two retaining cylinders to transverse deep and thick gravel layer

Abstract

The invention discloses a cast-in-place pile construction method by adopting two retaining cylinders to transverse a deep and thick gravel layer. The cast-in-place pile construction method is characterized by comprising the following steps: a, clamping the groove part of an outer steel retaining cylinder (5) with a clamp (2) of a vibration hammer (1); b, completely extracting rock cores from the outer steel retaining cylinder (5) with a rotary drilling machine; c, hoisting an inner steel retaining cylinder (3) with the vibration hammer; d, clamping a hoisting lug (4) on the outer steel retaining cylinder (5) with the vibration hammer (1); e, extracting soil from the inner steel retaining cylinder (3) with the rotary drilling machine; f, putting down a steel reinforcement cage; g, pouring concrete; and h, pulling out the inner steel retaining cylinder (3) with the vibration hammer (1) to complete pouring of a cast-in-place pile. The cast-in-place pile construction method by adopting the two retaining cylinders to transverse the deep and thick gravel layer has the characteristics of being capable of constructing the cast-in-place pile with the two retaining cylinders on a complicated stratum without special equipment, being high in construction speed and being low in manufacturing cost.

Description

technical field [0001] The invention relates to a construction method of cast-in-situ piles, in particular to a construction method of cast-in-situ piles which use double casings to pass through deep gravel layers. Background technique [0002] At present, the wall protection method of cast-in-place piles mostly adopts mud wall protection. However, in the construction of cast-in-situ piles in some deep mud layers, the effect of mud wall protection is often not very good, and many problems such as hole collapse, diameter shrinkage, and sediment will occur. [0003] In order to solve the above problems, a method for constructing cast-in-situ piles with full casing has appeared, that is, before constructing the cast-in-place piles, the steel casings are lowered into place, and then the cast-in-situ piles are constructed under the protection of the steel casings. At present, the commonly used steel casing methods at home and abroad are: rotary type (representative equipment suc...

AI Technical Summary

Problems solved by technology

However, the above three methods have one thing in common, that is, less construction equipment and high equipment purchase price.

[0006] Therefore, there are above-mentioned inconveniences and problems in the known cast-in-situ pile construction method that passes through the deep gravel layer.

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