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A platform for research: civil engineering, architecture and urbanism
Self-excitation type detection method for reinforcement quality of vibro-replacement stone column composite foundation
The invention discloses a self-excitation type detection method for the reinforcement quality of a vibro-replacement stone column composite foundation. Carrying out elastic wave velocity test and test pile test wave velocity zoning on the pretreated foundation, and meanwhile, carrying out ultra-static pore pressure monitoring to obtain ultra-static pore pressure; geophones and an acquisition instrument are selected to establish a gravel pile construction excitation signal acquisition system, and a space array of the geophones is arranged; elastic wave signals are collected in real time, filtering processing and signal identification are carried out, the arrival time of the elastic wave signals is extracted, a travel time equation set is constructed, and the elastic wave velocity of the wave velocity partition is iteratively inverted; and the corresponding relation of the effective confining pressure, the relative compactness and the elastic wave velocity of the soil body is established, the relative compactness of the soil body is obtained through input, and the reinforcement quality condition is compared and judged. According to the method, the travel time equation is iteratively processed in a wave velocity inversion and analysis mode to invert the wave velocity of the elastic wave, then the relative compactness of the soil body is determined through wave velocity interpretation, real-time detection of the reinforcement quality of the gravel pile composite foundation is achieved, and the method has the advantages of being large in detection range, wide in detection time domain, intelligent in detection and the like.
本发明公开了一种振冲碎石桩复合地基加固质量的自激式检测方法。对预处理地基进行弹性波波速测试和试桩试验波速分区，同时进行超静孔压监测获得超静孔压；选配检波器和采集仪建立碎石桩施工激振信号采集系统，布置检波器的空间阵列；实时采集弹性波信号，进行滤波处理和信号识别，提取弹性波信号到时，构建走时方程组并迭代反演波速分区的弹性波波速；建立土体有效围压、相对密实度与弹性波波速对应关系，输入得土体相对密实度，对比判断加固质量情况。本发明通过波速反演与分析方式迭代处理走时方程以反演弹性波波速进而波速解译确定土体相对密实度，实现碎石桩复合地基加固质量实时检测，具有检测范围大、检测时域广、检测智能化等优点。
Self-excitation type detection method for reinforcement quality of vibro-replacement stone column composite foundation
The invention discloses a self-excitation type detection method for the reinforcement quality of a vibro-replacement stone column composite foundation. Carrying out elastic wave velocity test and test pile test wave velocity zoning on the pretreated foundation, and meanwhile, carrying out ultra-static pore pressure monitoring to obtain ultra-static pore pressure; geophones and an acquisition instrument are selected to establish a gravel pile construction excitation signal acquisition system, and a space array of the geophones is arranged; elastic wave signals are collected in real time, filtering processing and signal identification are carried out, the arrival time of the elastic wave signals is extracted, a travel time equation set is constructed, and the elastic wave velocity of the wave velocity partition is iteratively inverted; and the corresponding relation of the effective confining pressure, the relative compactness and the elastic wave velocity of the soil body is established, the relative compactness of the soil body is obtained through input, and the reinforcement quality condition is compared and judged. According to the method, the travel time equation is iteratively processed in a wave velocity inversion and analysis mode to invert the wave velocity of the elastic wave, then the relative compactness of the soil body is determined through wave velocity interpretation, real-time detection of the reinforcement quality of the gravel pile composite foundation is achieved, and the method has the advantages of being large in detection range, wide in detection time domain, intelligent in detection and the like.
本发明公开了一种振冲碎石桩复合地基加固质量的自激式检测方法。对预处理地基进行弹性波波速测试和试桩试验波速分区，同时进行超静孔压监测获得超静孔压；选配检波器和采集仪建立碎石桩施工激振信号采集系统，布置检波器的空间阵列；实时采集弹性波信号，进行滤波处理和信号识别，提取弹性波信号到时，构建走时方程组并迭代反演波速分区的弹性波波速；建立土体有效围压、相对密实度与弹性波波速对应关系，输入得土体相对密实度，对比判断加固质量情况。本发明通过波速反演与分析方式迭代处理走时方程以反演弹性波波速进而波速解译确定土体相对密实度，实现碎石桩复合地基加固质量实时检测，具有检测范围大、检测时域广、检测智能化等优点。
Self-excitation type detection method for reinforcement quality of vibro-replacement stone column composite foundation
一种振冲碎石桩复合地基加固质量的自激式检测方法
ZHUANG DUANYANG (author) / ZHOU YANGUO (author) / YAO PENGFEI (author) / ZHANG DONGCHAO (author) / CHEN YUNMIN (author)
2023-08-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
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Gründungen
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G01D
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
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Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein
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G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
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INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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