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Pile body defect detection method

A defect detection and pile body technology, which is applied in the test of basic structure, construction, basic structure engineering, etc., can solve the problems of complicated detection process and time-consuming

Active Publication Date: 2018-09-21
浙江意诚检测有限公司
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Problems solved by technology

However, in engineering practice, pile foundations with pile body defects usually do not exceed 20%. In this method, when testing each pile foundation, it is necessary to press the excitation source from the upper end of the excitation wave tube to a certain level from top to bottom. The spacing is lowered until the bottom of the shock wave tube, the detection process is complicated and takes a lot of time

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Embodiment Construction

[0023] In order to illustrate the technical solution of the present invention more clearly, the present invention will be briefly introduced below using examples. Obviously, what is described below is only an embodiment of the present invention. For those of ordinary skill in the art, On the premise of paying creative efforts, other technical solutions can also be obtained according to these embodiments, which also belong to the disclosure scope of the present invention.

[0024] For the pile body defect detection method of the first embodiment of the present invention, see figure 1 , including the following steps: (1) setting the first vibration tube in the soil around the pile without defects, and setting the first acceleration sensor on the side wall of the top of the pile foundation; (2) placing the excitation source in the first excitation The bottom of the vibration tube is excited, and the first acceleration sensor is used to detect the time Tf when the first wave of th...

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Abstract

The invention provides a pile body defect detection method. Excitation sources are arranged in soil around piles beside a pile foundation, a sensor arranged on the side wall of the top of the pile foundation is used for detecting transmitted stress wave signals, and according to the position of a head wave gradient inflection point in a time-depth oscillogram, the quality of the pile foundation and the position of a pile body defect in the pile foundation are determined. Head wave time detected by the to-be-detected pile foundation is compared with head wave time of a standard pile foundation,thus, whether the pile foundation has the pile body defect or not can be pre-determined, when the pile foundation does not have the pile body defect, it is not needed to determine the position of thepile body defect through excitation sources at different positions, under the condition of the same detection effect, the detection time can be shortened, and the detection efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of pile foundation detection, in particular to a pile body defect detection method. Background technique [0002] As a form of deep foundation structure, pile foundation has been widely used in the field of civil engineering. The pile foundation can transfer the self-weight and load of the superstructure to the stable soil layer in contact with the pile foundation, thus greatly reducing the settlement of the foundation and the uneven settlement of the building. Pile foundations have the advantages of high bearing capacity, small settlement, and strong earthquake resistance. They have been widely used in areas with complex geological conditions, soft soil, and frequent earthquakes, and have achieved considerable results. [0003] Pile foundations can be divided into cast-in-situ piles and prefabricated piles according to the manufacturing process. Among them, cast-in-place piles are widely used, such as: bri...

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Application Information

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IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 江曼
Owner 浙江意诚检测有限公司
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