基于贝叶斯二维反演的地下连续墙隐患电阻率成像
发布时间：2019-05-22 18:13
【摘要】：针对城建深基坑围护和水利防渗的地下连续墙病害隐患探测难题及特点,考虑到地连墙渗漏会造成墙体内外电阻率显著的变化,可引入地球物理探测方法中的直流电法技术,但传统地面电法的隐患探测效果不理想.考虑到地下连续墙施工时在墙体中设置测斜管,因此可开展地连墙内部缺陷的跨孔电阻率层析成像.而鉴于非线性反演具有对初始模型依赖性不强的特点,提出了基于贝叶斯反演理论的电阻率层析成像.在MATLAB开发环境下,编程完成的多组不同地电异常体的数值模拟反演计算表明,反演结果的信息丰富,对异常体的成像准确高效,且反演结果的稳定性好.
[Abstract]:In view of the difficult problems and characteristics of hidden danger detection of underground continuous wall diseases in deep foundation pit enclosure and water conservancy seepage prevention of urban construction, considering that the leakage of ground connecting wall will cause significant changes in electrical resistance inside and outside the wall, the DC electric method technology in geophysical detection method can be introduced. However, the hidden danger detection effect of traditional ground electrical method is not ideal. Considering that the oblique pipe is set up in the wall during the construction of the underground continuous wall, the cross-hole resistivity tomography of the internal defects of the ground connecting wall can be carried out. In view of the fact that nonlinear inversion is not dependent on the initial model, a resistance tomography based on Bayesian inversion theory is proposed. In the MATLAB development environment, the numerical simulation inversion calculation of several groups of different geoelectric anomalies shows that the inversion results are rich in information, accurate and efficient for the imaging of abnormal bodies, and the inversion results are stable.
【作者单位】： 同济大学海洋与地球科学学院;云南省建设投资控股集团有限公司;浙江水利水电学院;
【基金】：国家自然科学基金项目(41374146)资助
【分类号】：P631.322
本文编号：2483131
[Abstract]:In view of the difficult problems and characteristics of hidden danger detection of underground continuous wall diseases in deep foundation pit enclosure and water conservancy seepage prevention of urban construction, considering that the leakage of ground connecting wall will cause significant changes in electrical resistance inside and outside the wall, the DC electric method technology in geophysical detection method can be introduced. However, the hidden danger detection effect of traditional ground electrical method is not ideal. Considering that the oblique pipe is set up in the wall during the construction of the underground continuous wall, the cross-hole resistivity tomography of the internal defects of the ground connecting wall can be carried out. In view of the fact that nonlinear inversion is not dependent on the initial model, a resistance tomography based on Bayesian inversion theory is proposed. In the MATLAB development environment, the numerical simulation inversion calculation of several groups of different geoelectric anomalies shows that the inversion results are rich in information, accurate and efficient for the imaging of abnormal bodies, and the inversion results are stable.
【作者单位】： 同济大学海洋与地球科学学院;云南省建设投资控股集团有限公司;浙江水利水电学院;
【基金】：国家自然科学基金项目(41374146)资助
【分类号】：P631.322
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1 赵双喜;地震频发区地下连续墙基坑支护结构地震反应分析[D];兰州交通大学;2014年
，本文编号：2483131
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