Construction method for composite pile

Abstract

The invention discloses a construction method for a composite pile. The method comprises the following steps: drilling a hole in a preset pile position to a set depth by using a drilling machine, and filling a gripping material into the drilled hole in a pressure filling way; inserting a precast pile into the drilled hole to finish construction of the composite pile, wherein the gripping material consists of one or more of cement, soil cement, cement mortar, fine stone concrete and a cement coal ash mixture meeting a pumping requirement, and the gripping material is in a liquid state; the pressure filling amount of the gripping material is 40-60 percent of the volume of the drilled hole. The construction method for the composite pile disclosed by the invention is easy, convenient and feasible, has the advantages of high quality, low construction cost and short construction period, and is very suitable to be applied to coastal engineering geology which has high underwater level and is soft on the upper part and hard on the lower part.

Description

technical field [0001] The invention relates to the field of pile foundations in civil engineering, in particular to a construction method of a composite pile. Background technique [0002] Due to various reasons such as soil properties, technology, and equipment, prefabricated (solid or hollow) piles that are squeezed soil piles often have irregular piles that are not in place and pile lengths are very different, which seriously affects the quality of the project and has great potential problems. security risks. [0003] In the prior art, the common composite piles are cement-soil piles. Especially after the powder spraying process is used, the prefabricated piles are inserted to form stiff composite piles. The subsequent prefabricated piles are more difficult to construct. High bearing capacity is difficult to ensure in practice. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior a...

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Problems solved by technology

[0002] Due to various reasons such as soil properties, technology, and equipment, prefabricated (solid or hollow) piles that are squeezed soil piles often have irregular piles that are not in place and pile lengths are very different, which seriously affects the quality of the project and has great potential problems. security risks

[0003] In the prior art, the common composite piles are cement-soil piles. Especially after the powder spraying process is used, the prefabricated piles are inserted to form stiff composite piles. The subsequent prefabricated piles are more difficult to construct. High bearing capacity, but difficult to ensure in practice

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