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Single-pile vertical ultimate bearing capacity dynamic testing method based on discrete pile units
The invention discloses a single-pile vertical ultimate bearing capacity dynamic testing method based on discrete pile units, and belongs to the field of foundation detection and testing. According tothe single-pile vertical ultimate bearing capacity dynamic testing method based on the discrete pile units, firstly, a pile body is dispersed into the plurality of pile units in the depth direction,the accelerated speed of the center position of each pile unit, the axial force of the top face and the bottom face of each pile unit and the like in the vibration process are measured correspondingly, physical quantities such as the pile body speed and displacement are obtained through integral transformation; then the moment when the dynamic displacement of each pile unit reaches the maximum (atthe moment, the dynamic damping force is zero) is selected, the static ultimate resistance of the pile side soil (or the pile end soil) borne by each pile unit at the moment is calculated; and finally the static ultimate resistance of each pile unit is accumulated to obtain the static ultimate bearing capacity of a single pile. According to the novel dynamic test analysis method, the defects of high cost, long test period and the like in a static load test can be overcome, meanwhile, the analysis of a test result is objective, the interference of human factors is small, and the result is theoretically accurate.
本发明公开了一种基于离散桩单元的单桩竖向极限承载力动态测试方法，属于地基基础检测和试验领域。本发明首先将桩身沿深度方向离散为若干桩单元，分别测量振动过程中各桩单元中心位置的加速度、桩单元顶面和底面的轴力等，经过积分变换得到桩身速度、位移等物理量；然后选择各桩单元动位移达到最大的时刻(此时动阻尼力为零)，计算该时刻各桩单元所受桩侧土(或桩端土)的静态极限阻力；最后将各桩单元的静态极限阻力累加获得单桩静态极限承载力。这种新的动态测试分析方法，可避免静载试验中费用高昂，试验工期较长等缺点，同时对测试结果的分析较为客观，受人为因素干扰小，结果理论上也较为准确。
Single-pile vertical ultimate bearing capacity dynamic testing method based on discrete pile units
The invention discloses a single-pile vertical ultimate bearing capacity dynamic testing method based on discrete pile units, and belongs to the field of foundation detection and testing. According tothe single-pile vertical ultimate bearing capacity dynamic testing method based on the discrete pile units, firstly, a pile body is dispersed into the plurality of pile units in the depth direction,the accelerated speed of the center position of each pile unit, the axial force of the top face and the bottom face of each pile unit and the like in the vibration process are measured correspondingly, physical quantities such as the pile body speed and displacement are obtained through integral transformation; then the moment when the dynamic displacement of each pile unit reaches the maximum (atthe moment, the dynamic damping force is zero) is selected, the static ultimate resistance of the pile side soil (or the pile end soil) borne by each pile unit at the moment is calculated; and finally the static ultimate resistance of each pile unit is accumulated to obtain the static ultimate bearing capacity of a single pile. According to the novel dynamic test analysis method, the defects of high cost, long test period and the like in a static load test can be overcome, meanwhile, the analysis of a test result is objective, the interference of human factors is small, and the result is theoretically accurate.
本发明公开了一种基于离散桩单元的单桩竖向极限承载力动态测试方法，属于地基基础检测和试验领域。本发明首先将桩身沿深度方向离散为若干桩单元，分别测量振动过程中各桩单元中心位置的加速度、桩单元顶面和底面的轴力等，经过积分变换得到桩身速度、位移等物理量；然后选择各桩单元动位移达到最大的时刻(此时动阻尼力为零)，计算该时刻各桩单元所受桩侧土(或桩端土)的静态极限阻力；最后将各桩单元的静态极限阻力累加获得单桩静态极限承载力。这种新的动态测试分析方法，可避免静载试验中费用高昂，试验工期较长等缺点，同时对测试结果的分析较为客观，受人为因素干扰小，结果理论上也较为准确。
Single-pile vertical ultimate bearing capacity dynamic testing method based on discrete pile units
一种基于离散桩单元的单桩竖向极限承载力动态测试方法
WANG KUIHUA (author) / TU YUAN (author) / LIU XIN (author) / QIU XINCHEN (author) / TAN JIE (author) / ZHAO SHUANG (author) / XIANG CHIXUAN (author) / YU ZHE (author)
2020-09-15
Patent
Electronic Resource
Chinese
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