當土壤中注入灌漿材料時，除對現地土壤之工程性質產生影響外也會對原土壤介質的導電性造成變化，此一導電性之變化若能予以量測，可作為侵入介質(即灌漿材料)分佈狀況的判斷指標。因此，本研究於台北市承德路六段，士林高爾夫練習俱樂部東方50公尺處取得之土樣，進行一系列之導電性研究。並求出低塑性黏土(CL)、粉質砂土(SM)、低塑性粉土(ML)等三種土壤之含水量和孔隙比，對電阻率之影響關係；同時也量測出幾種常用的低壓灌漿材料之電阻率。最後在以上述結果為基礎，分別以水平脈狀分佈和近似脈狀分佈試體來量測其電導率，建立灌漿材料在粉質砂土中劈裂脈狀之分佈情況與其電導率之關係，再由其推估出脈狀分佈比N和電導率變化比σa之關係轉換式，希冀於未來施作雙環塞灌漿工法時，能以現場二維地電阻量測出其灌漿材料在地層脈狀分佈上之解析。

When injecting grout material to the ground, it not only changes the engineering properties of soil but also the electrical conductivity of soil. The change of electrical resistivity of in-situ soil is related to the intrusions of grout material in soil and can be used as an index of grouting quality. Soil samples from the Shih Lin district of Taipei city was used for a series soil conductivity tests. The relationship between water contents and void ratios of clayey soil (CL), silty sand (SM), and silty soil (ML) and the conductivity of soil was determined. Meanwhile, the electrical resistivities of several different grout materials were also measured. Based on the results above, the electrical resistivities of fracture grouted soil with either layered or randomly distributed intrusions were measured using a two-electrode soil specimen box. Subsequently, the relationship of grout intrusion ratio (N) of grouted soil and change of conductivity ratio (sa) is established. Such relationship can be used to estimate the effectiveness of soil grouting from the soil resistivity measurement by Electrical Resistivity Tomography (ERT) method.

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