A construction quality inspection method for vertical composite water-stop curtain body

Abstract

The invention relates to a construction quality detecting method of a vertical compound waterproof curtain body, belongs to the technical field of design and construction of geotechnical engineering, and solves the problems of weak accuracy and low efficiency in traditional drilling coring methods. The detecting method comprises the following steps: (1) multiple PVC pipes, a vibration source and an detector are provided; (2) the vertical compound waterproof curtain body is divided into multiple detecting units; each detecting unit is divided into multiple testing hole sections; each testing hole section comprises at least two testing holes; and the hole positions and the hole depths of the testing holes are determined; (3) the testing holes are formed; the coring is performed in the whole pile length; and the PVC pipes are put into the testing holes; (4) when one of the testing hole sections is detected, the vibration source and the detector are respectively mounted in the adjacent two testing holes; after the detection of one testing hole is finished, the hole positions of the vibration source and the detector are exchanged to finish the detection of another testing holes; and all the testing hole sections are detected in sequence; and (5) the pile quality is evaluated to give treatment suggestions.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering design and construction, in particular to a method for detecting the construction quality of a vertical composite water-stop curtain body. Background technique [0002] For complex geological conditions near the sea, when designing foundation pit enclosure, the vertical composite water-stop curtain body includes three-axis mixing piles and high-pressure jet grouting piles, and the three-axis mixing piles are located above the bedrock surface. The axis of the center coincides with each other, that is, the high-pressure jet grouting pile and the three-axis mixing pile are concentric and embedded in the bedrock, and the two piles overlap 1.0m up and down. [0003] The quality inspection of the vertical composite water-stop curtain usually adopts the method of drilling cores. The specific method is: use a φ110 drill bit to drill the cores of the vertical composite water-stop curtain w...

AI Technical Summary

Problems solved by technology

[0005] (1) The core sample is easily broken

[0006] Due to the inhomogeneity of cement-soil, low strength of cement-soil and improper operation of core drilling, the core sample is easily broken during the sampling process, and it is difficult to guarantee the authenticity of the test results

[0007] (2) Damage to the pile body

[0008] Drilling and coring is a destructive testing method, which will cause damage to the pile body during the testing process, resulting in a decline in the strength and anti-seepage effect of the pile body

[0009] (3) Long detection time and high detection cost

[0010] Drilling and coring inspection takes a long time and the cost of drilling is high, so only a small number of piles can be extracted for inspection

[0011] (4) Cannot be fully detected

[0012] Drilling and coring are arranged at a certain interval, and only some scattered points can be detected, and the construction quality of the entire anti-seepage curtain body cannot be fully detected and evaluated

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