文献类型：期刊文献

英文题名：A three-dimensional algorithm for estimating water-tightness of cement-treated ground with geometric imperfections

作者：Pan, Yutao[1];Yi, Jiangtao[2];Goh, Siang-Huat[1];Hu, Jun[3];Wang, Wei[4];Liu, Yong[5]

机构：[1]Natl Univ Singapore, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 119576, Singapore;[2]Chongqing Univ, Sch Civil Engn, 83 Shabei St, Chongqing 400045, Peoples R China;[3]Hainan Univ, Coll Civil Engn & Architecture, Haikou 570228, Hainan, Peoples R China;[4]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[5]Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China

年份：2019

卷号：115

外文期刊名：COMPUTERS AND GEOTECHNICS

收录：SCI-EXPANDED(收录号：WOS:000506718800024)、、EI(收录号：20193207271965)、Scopus(收录号：2-s2.0-85073651387)、WOS

基金：This research is supported by the research funding provided by the NRF-NSFC 3rd Joint Research Grant (Earth Science) (Grant No. 41861144022), National Natural Science Foundation of China (grant number 51778091), the National Natural Science foundation of China (Grant No. 51879203), Hainan Provincial Natural Science Foundation of China (519QN333, 518QN307, 518MS122), the National Natural Science Foundation of China (41772311) and the Zhejiang Provincial Natural Science Foundation of China (LY17E080016).

语种：英文

外文关键词：Ground improvement; Cement-treated soil; Seepage; Geometric imperfection; Algorithm

外文摘要：Jet-grouted cut-off walls (JGCOWs) and jet-grouted earth-plugs (JGEPs) are commonly used as artificial water barriers to impede ground water from seeping downstream of dams or into deep excavation pits. However, due to positioning errors and variability of column diameters, seepage passages may occasionally penetrate through the water barrier, thus undermining its water-tightness. A three-dimensional discretized algorithm (TDA) is proposed for quantitatively estimating the effect of the above geometrical imperfections on the water-tightness. With given random geometries of the treated ground, this algorithm is able to examine whether a water barrier is penetrated by seepage passages. It further quantitatively estimates the flow rate through the water barrier with the given random geometry. When compared with the results from 3-D random finite element analysis, it was found that the TDA results show strong correlations with FEM results, but at a remarkably reduced computational cost. The TDA generally gives a slightly more conservative estimation of flow rate than the FEM counterpart due to the lengthened seepage distance due to random corrugations in the penetrating untreated zones.