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Base-pile tilt nondestructive detecting method

A technology of non-destructive testing and foundation piles, which is applied to measuring devices, instruments, and the use of ultrasonic/sonic/infrasonic waves, etc. It can solve the problems of time-consuming and labor-intensive testing, high testing costs, and non-destructive testing of verticality.

Inactive Publication Date: 2009-06-03
广东省工程勘察院
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] According to the national "Code for Construction Quality Acceptance of Building Foundation Engineering" (GB50202-2002), the allowable deviation of the verticality of the pile foundation shall not exceed 1%. The verticality is controlled and observed during the process. After the pile is formed, the verticality of the pile can be indirectly checked by drilling holes on the pile body. The detection process is time-consuming and laborious, and the detection cost is high. Generally, only a few piles can be spot-checked , it is impossible to perform non-destructive testing on the verticality of all piles

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Embodiment Construction

[0050] Embodiment of the present invention is described below in conjunction with accompanying drawing, No. 1 pile is a vertical pile, and No. 11 pile is an inclined pile:

[0051] Detection principle of the present invention is:

[0052] Such as figure 1 ~As shown in Figure 6, when a momentary force is applied to the pile head, the particle on the end surface of the pile is subjected to force and then vibrates, and the propagation of vibration forms various elastic waves (including longitudinal waves, transverse waves, etc.). , the elastic wave will propagate along the pile body. According to the Huygens-Fresnel principle, Fermat principle and wave superposition principle, that is, the wave propagates to any point in space, and this point can be regarded as a new Point source, the fluctuation observed at any point in space is the synthesis of the vibrations caused by the waves meeting at this point. According to the above principle, for vertical piles and inclined piles, due...

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Abstract

A non-destructive inspection method for foundation pile inclination, which contains applying a instantaneous force to pile head to make the forced point generating vibration which propagates and forms various kinds of elastic wave, according to the Huygens-Fresnel principle, Fermat principle and wave susperposition principle, the wave motion shape is different, the sensor set on pile head detecting vibration signal and transmitting it to data recording and processing system to analyze, to obtain time travel curve, amplitude spectrum and pile toe reflection coefficient, according to them, judging whether the pile is inclined, the inclination direction and verticality deviation.

Description

technical field [0001] The invention relates to a non-destructive detection method for foundation pile inclination. Background technique [0002] According to the national "Code for Construction Quality Acceptance of Building Foundation Engineering" (GB50202-2002), the allowable deviation of the verticality of the pile foundation shall not exceed 1%. The verticality is controlled and observed during the process. After the pile is formed, the verticality of the pile can be indirectly checked by drilling holes on the pile body. The detection process is time-consuming and laborious, and the detection cost is high. Generally, only a few piles can be spot-checked , it is impossible to perform non-destructive testing on the verticality of all piles. Contents of the invention [0003] The purpose of the present invention is to provide a non-destructive detection method for foundation pile inclination, that is, the inclination direction and inclination of the hidden pile can be d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B17/00
Inventor 邓业灿李毅臻黄汉平向新生林松祥
Owner 广东省工程勘察院