Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Foundation pile quality nondestructive testing method based on bypass hole diffracted wave analysis
The invention discloses a foundation pile quality nondestructive testing method based on bypass hole diffracted wave analysis, and belongs to the field of foundation test detection. According to the method, a diffraction phenomenon in a seismic wave propagation process is used for analyzing a defect position and a pile bottom position of the foundation pile. When seismic waves are transmitted to discontinuity points such as pile body defects and pile bottoms, the discontinuity points are like the diffraction phenomenon of light rays passing through a small hole in physical optics, the discontinuity points can be regarded as new seismic sources, and diffracted waves generated by the new seismic sources are transmitted to surrounding soil bodies. A hole is formed beside the foundation pile, and an engineering seismograph is used for receiving the diffracted waves transmitted from the pile body defects, the pile bottoms and other discontinuity points in a depth direction of a test hole. A time-depth wave train diagram is generated by using the received diffracted wave signal. On the wave train diagram, corresponding depth of a signal intersection of uplink diffracted waves and downlink diffracted waves is position depth of the pile body defects or the pile bottoms or other discontinuity points. The diffracted wave analysis method not only can detect quality of the foundation pile in a general state, but also can detect the quality of the foundation pile under the existing building and quality of the long foundation pile and other problems which are difficult to solve by the traditional detection method.
本发明公开了一种基于旁孔绕射波分析的基桩质量无损检测方法，属于地基基础试验检测领域。本发明是利用地震波传播过程中的绕射现象来分析基桩的缺陷位置和桩底位置。地震波传播到桩身缺陷和桩底等间断点，就会像物理光学中光线通过一个小孔发生衍射现象一样，这些间断点都可看成是一个新震源，由此新震源产生的绕射波向周围土体传播。在基桩旁成孔，利用工程地震仪沿测试孔深度方向接收从桩身缺陷和桩底等间断点传播过来的绕射波。将接收到的绕射波信号生成时间‑深度波列图。在波列图上，上行绕射波与下行绕射波的信号交汇点对应深度为桩身缺陷或桩底等间断点的位置深度。绕射波分析方法不但可以检测一般状态下的基桩质量，还可以检测既有建筑物下基桩质量和长桩长基桩质量等传统检测方法难以解决的问题。
Foundation pile quality nondestructive testing method based on bypass hole diffracted wave analysis
The invention discloses a foundation pile quality nondestructive testing method based on bypass hole diffracted wave analysis, and belongs to the field of foundation test detection. According to the method, a diffraction phenomenon in a seismic wave propagation process is used for analyzing a defect position and a pile bottom position of the foundation pile. When seismic waves are transmitted to discontinuity points such as pile body defects and pile bottoms, the discontinuity points are like the diffraction phenomenon of light rays passing through a small hole in physical optics, the discontinuity points can be regarded as new seismic sources, and diffracted waves generated by the new seismic sources are transmitted to surrounding soil bodies. A hole is formed beside the foundation pile, and an engineering seismograph is used for receiving the diffracted waves transmitted from the pile body defects, the pile bottoms and other discontinuity points in a depth direction of a test hole. A time-depth wave train diagram is generated by using the received diffracted wave signal. On the wave train diagram, corresponding depth of a signal intersection of uplink diffracted waves and downlink diffracted waves is position depth of the pile body defects or the pile bottoms or other discontinuity points. The diffracted wave analysis method not only can detect quality of the foundation pile in a general state, but also can detect the quality of the foundation pile under the existing building and quality of the long foundation pile and other problems which are difficult to solve by the traditional detection method.
本发明公开了一种基于旁孔绕射波分析的基桩质量无损检测方法，属于地基基础试验检测领域。本发明是利用地震波传播过程中的绕射现象来分析基桩的缺陷位置和桩底位置。地震波传播到桩身缺陷和桩底等间断点，就会像物理光学中光线通过一个小孔发生衍射现象一样，这些间断点都可看成是一个新震源，由此新震源产生的绕射波向周围土体传播。在基桩旁成孔，利用工程地震仪沿测试孔深度方向接收从桩身缺陷和桩底等间断点传播过来的绕射波。将接收到的绕射波信号生成时间‑深度波列图。在波列图上，上行绕射波与下行绕射波的信号交汇点对应深度为桩身缺陷或桩底等间断点的位置深度。绕射波分析方法不但可以检测一般状态下的基桩质量，还可以检测既有建筑物下基桩质量和长桩长基桩质量等传统检测方法难以解决的问题。
Foundation pile quality nondestructive testing method based on bypass hole diffracted wave analysis
基于旁孔绕射波分析的基桩质量无损检测方法
WU BAOJIE (Autor:in) / YANG HUA (Autor:in) / HUANG LINWEI (Autor:in) / DONG YUE (Autor:in) / HUANG YONGFENG (Autor:in) / ZANG RUI (Autor:in)
20.08.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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