Evaluation of Reliability of Earth Resistivity Method in Thinly Mantled Karst

[9734899] Roth《薄地膜岩溶地电阻率法的可靠性评价》薄地膜岩溶地陷是造成施工成本超支和结构物使用寿命失效的常见原因。这些故障的频率可以通过改进施工前的岩土工程现场调查来减少。提出的研究目的是调查和证明使用电阻率方法来提高具有粘土的喀斯特地区基础设计的可靠性。目前，在含粘土的喀斯特地区进行现场调查的方法一般局限于钻孔和其他类型的侵入探针。这些方法定位可能导致天坑形成的条件的可靠性较差。本研究的研究活动将评估地电阻率法作为这些地区现场调查工具的可靠性，并证明其作为提高基础可靠性的方法的使用。在这项研究中，将调查两个已知地下空洞和频繁天坑形成的区域。将使用带多个电极的大地电阻率计在多个不同间距处进行线路测量。数据显示的异常将使用钻孔法或开挖法加以确认。测试结果将用于开发线和节点间距之间的关系以及检测给定大小的异常的可能性。＊＊＊

9734899 Roth "Evaluation of Reliability of the Earth Resistivity Method in Thinly Mantled Karst" Sinkhole occurrences in areas of thinly mantles karst are a common cause of cost overruns during construction and failures of structures during their useful life. The frequency of these failures can be reduced by improved geotechnical site investigation prior to construction. The objective of the proposed study is to investigate and demonstrate the use of resistivity methods to increase the reliability of foundation design in karst areas with clay soils. At the present time, methods of site investigation in karst areas with clay soils are generally limited to borings and other types of intrusive probes. The reliability of these methods for locating conditions which may lead to the formation of sinkholes is poor. The research activities in this study will evaluate the reliability of the earth resistivity method as a tool for site investigation in these areas and demonstrate its use as a method to improve foundation reliability. In this study, two areas of known subsurface voids and frequent sinkhole formation will be investigated. Line surveys at a number of different spacings will be conducted using an earth resistivity meter with multiple electrodes. Anomalies indicated by the data will be confirmed using boring methods or excavation. The results of the testing will be used to develop relationships between line and node spacing and the probability of detecting an anomaly of a given size. ***