Nondestructive testing method for pile length of vibro-replacement stone pile
A vibrating gravel pile and non-destructive testing technology, which is applied in soil protection, foundation structure testing, construction, etc., can solve problems such as inability to detect quickly and effectively, achieve low cost, easy operation and implementation, and reflective wave signal clear and visible effect
Inactive Publication Date: 2021-07-09
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Problems solved by technology
The detection methods of vibrating gravel piles mainly include soil standard penetration test between piles, single pile static load test and composite foundation load test and other bearing characteristic detection methods. Except for excavation, it is currently impossible to quickly and effectively detect key indicators such as pile length
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[0015] The present invention will be further described below in conjunction with the accompanying drawings.
[0016] Such as figure 1 The non-destructive testing method for the length of the vibrating gravel pile shown includes the following steps: a. Before the construction of the vibrating gravel pile 5 to be tested, the tracer 1 is mixed into the bottom filler 2 of the pile body, and the indicated The mixture of tracer 1 and pile bottom filler 2 gathers at the bottom of vibrating gravel pile 5; b. After the construction of the mixture filler at the bottom of vibrating gravel pile 5 is completed, the construction of vibrating gravel pile 5 is completed and the pile is completed c. After the pile body ordinary filler 6 construction of the whole vibro-rammed stone pile 5 is completed, the ground-penetrating radar 3 is used to detect the tracer 1 at the bottom of the vibro-rammed stone pile 5, and obtained The pile length of vibrating crushed stone pile 5.
[0017] The invent...
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The invention relates to the field of testing methods for vibro-replacement stone piles of water conservancy and hydropower facilities, and particularly relates to a nondestructive testing method for the pile length of a vibro-replacement stone pile. The nondestructive testing method can be used for quickly and accurately testing the pile length of the vibro-replacement stone pile and comprises the following steps of: a, before the construction of the vibro-replacement stone pile to be tested, mixing a tracer agent into a filler at the bottom of a pile body, and gathering a mixture of the tracer agent and the filler at the bottom of the pile body to the bottom of the vibro-replacement stone pile; b, after the construction of the filler of the mixture at the bottom of the vibro-replacement stone pile is finished, finishing the construction of the vibro-replacement stone pile, namely finishing the construction of a common filler; and c, after the construction of the common filler of the whole vibro-replacement stone pile is finished, detecting the tracer agent at the bottom of the vibro-replacement stone pile by adopting a ground penetrating radar, and obtaining the pile length of the vibro-replacement stone pile. According to the method, a reflected wave signal at the bottom of a lower pile of the vibro-replacement stone pile is clear and obvious, and the pile length of the vibro-replacement stone pile can be effectively determined; meanwhile, the operation and the implementation are simple and convenient, and the on-site construction progress is not influenced; and the method is low in cost and can be widely applied to engineering practice.
Description
technical field [0001] The invention relates to the field of detection methods for vibrating gravel piles of water conservancy and hydropower facilities, in particular to a non-destructive detection method for the length of vibrating gravel piles. Background technique [0002] With the adjustment of the national energy structure, hydropower development has ushered in new development opportunities, especially in the deep mountains and river valleys in the southwest region. However, due to the constraints of environmental conditions, the above-mentioned power stations are mostly built on deep overburden layers, and the economical efficiency of traditional excavation methods for foundation treatment is poor, so vibro-impact gravel piles are often used for foundation reinforcement. The quality inspection of vibrating gravel piles is the key to evaluating the effect of foundation treatment, mainly including bearing characteristics, pile length, etc. The detection methods of vibr...
Claims
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IPC IPC(8): E02D33/00E02D3/08
CPCE02D33/00E02D3/08
Inventor 詹候全蒋炳楠刘志辉王锋
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE