Double shroud structure for easy pile test

Abstract

The invention relates to the technical field of test pile tests, and discloses a double-pile casing structure facilitating test pile tests. The double-pile casing structure comprises an inner pile casing arranged on the outer surface of a cast-in-place pile in a sleeving mode, and an outer pile casing arranged on the outer circumference of the inner pile casing; annular spacer area is defined between the outer pile casing and the inner pile casing; the upper portion of the spacer area is provided with an upper opening; the lower portion of the spacer area is provided with a lower opening; thelower portion of the spacer area is provided with a lower closing structure; the lower closing structure closes the lower opening of the spacer area; the upper portion of the spacer area is provided with an upper closing structure; the upper closing structure closes the upper opening of the spacer area; an isolation block is arranged on the outer surface of the inner pile casing in a protruding mode; and a gap is formed between the isolation block and the inner surface of the outer pile casing. By arranging the isolation block, on the one hand, the gap between the inner pile casing and the outer pile casing can be controlled, on the one hand, the inner pile casing and the outer pile casing can be fixed, thus, the stability between the inner pile casing and the outer pile casing in the construction process is ensured, and the structure has high practicability.

Description

technical field [0001] The patent of the present invention relates to the technical field of pile testing, in particular, it relates to a double casing structure which is convenient for pile testing. Background technique [0002] In order to ensure the design accuracy and construction quality in pile foundation engineering, it is required to carry out pile test in advance for specific sites and construction techniques. In the traditional pile test process, it is necessary to excavate the foundation pit to the design pit bottom elevation before carrying out the test pile. test to ensure the accuracy of test pile results. [0003] At present, the pile test is carried out on the original ground before the start of the project, but the soil layer and the pile between the design pile top elevation and the original ground will produce frictional resistance, which will lead to an error between the bearing capacity of the test pile and the actual bearing capacity. [0004] In the p...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a double-casing structure that is convenient for pile testing, and aims to solve the problems of poor stability and poor drag-reducing effect of the double-casing structure in the prior art

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