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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.
In view of the difficult problems and characteristics of underground diaphragm wall hidden danger detection of deep foundation pit retaining and water seepage control in urban construction, considering that the leakage of ground continuous wall causes the significant change of the resistivity inside and outside the wall, the direct current method Technology, but the traditional ground electrical method detection of hidden dangers is not ideal.Considering the construction of underground diaphragm wall in the installation of inclinometer tube, it can be carried out within the walls of the hole transimpedance resistivity tomography.Because of non The linear inversion has the characteristics of less dependence on the initial model, and the resistivity tomography based on the Bayesian inversion theory is proposed.In the MATLAB development environment, the programmed numerical simulation of different groups of different geoelectric anomalies The calculation shows that the information of the inversion result is rich, the imaging of the abnormal body is accurate and efficient, and the stability of the inversion result is good.