ESTIMATING UNDRAINED SHEAR STRENGTH OF SOFT CLAY GROUND IMPROVED BY PRE-LOADING WITH PVD : CASE HISTORY IN BANGKOK
ESTIMATING UNDRAINED SHEAR STRENGTH OF SOFT CLAY GROUND IMPROVED BY PRE-LOADING WITH PVD : CASE HISTORY IN BANGKOK
复制标题
估算通过 PVD 预载改善软粘土地基的不排水抗剪强度：曼谷案例
DOI：
10.3208/sandf.41.4_95
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发表时间：
2001
影响因子：
3.7
通讯作者：
L. Hanh
中科院分区：
文献类型：
--
作者：
S. Shibuya;L. Hanh
采用预制垂直排水板（PVD）和堆载预压相结合的加固方法，可以在较短的时间内使极软粘土达到规定的强度和压缩性。本说明介绍了在曼谷进行的这种改进的历史案例。通过现场十字板试验（FVT）和平板试验（DMT），研究了曼谷地区两个场地地基加固前后不排水抗剪强度s（sub u）的变化。FVT的结果表明，软曼谷粘土的s（sub u）值增加几乎整个深度下降到PVDs的尖端。它也表明，DMT可能是一个有用的工具，迅速评估的变化S（子u）在软粘土由于预压。本文还讨论了SHANSEP法在估算新近超固结粘土地基预压后s（sub u）随深度变化的适用性。（一）
The installment of pre-fabricated vertical drain (PVD) combined with pre-loading is an efficient way to gain the prescribed strength and compressibility of very soft clay over a short period of time. This note describes case histories of such improvement performed in Bangkok. The change in undrained shear strength, s(sub u), before and after the ground improvement was investigated at two sites in Bangkok area by means of field vane test (FVT) and flat dilatometer test (DMT). The results of FVT showed that the s(sub u) value of soft Bangkok clay increased over nearly the full depth down to the tip of the PVDs. It is also demonstrated that DMT may be a useful tool for promptly assessing the change of S(sub u) in soft clay due to pre-loading. Applicability of the SHANSEP method in estimating the profile of s(sub u) with depth in recently over consolidated clay ground after pre-loading is also discussed. (A)