Preliminary Study of Interrelationships of In-Situ Penetration Tests

• Main Authors: Chen-kai Liu, 劉鎮愷
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/33748937601548646683

碩士 === 義守大學 === 土木與生態工程學系碩士班 === 96 === Cone Penetration Test (CPT), Flat Dilatometer Test (DMT), and Standard Penetration Test (SPT) are three in-situ tests of the geotechnical engineering. The mechanism of those three tests are some different. CPT is an easy, fast sounding method. It can conducted accurate, credible and near continuous data. The flat dilatometer is a stainless steel blade having a flat, circular steel membrane mounted flush on one side. The blade is advanced into the ground of test depth and the procedure for taking A, B readings is repeated at each depth. The primary way of using DMT results is to interpret them in terms of common soil parameters, especially for the exploration of horizontal stresses, in-situ stresses, and compressibility of soil. SPT is a traditional, universal test used for site characteristic. In this thesis, preliminary study of the interrelationships of CPT and DMT data are conducted. Two sites data of CPT, DMT and SPT were collected, and attempted to build a correlation between CPT and DMT data. Besides, the soil classification by SPT soil samples were used to check the results of CPT and DMT soil classified system. The results show that the interrelationships between the DMT readings ( p0 and p1) and CPT readings (qc, fs and u2) are quite consistently similar in magnitude. The ratio of CPT－qc and DMT－P1 in sandy and clayey soil are about 4.7~6.7 and 1.4~1.9, respectively. The ratio of CPT－fs and DMT－P0 is about 5.0~5.5 in sandy soil layer.