Effect of spatial variability on the bearing capacity of cement-treated ground

被引：83

作者：

Kasama, Kiyonobu ^{[1
]}

Whittle, Andrew J. ^{[2
]}

Zen, Kouki ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Div Civil & Struct Engn, Fukuoka 812, Japan

[2] MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA

来源：

SOILS AND FOUNDATIONS | 2012年 / 52卷 / 04期

关键词：

Cement stabilization; Bearing capacity; Limit analysis; Monte Carlo method; Probabilistic methods; Cohesive soils; SOIL; COLUMNS; CLAY;

D O I：

10.1016/j.sandf.2012.07.003

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

This paper presents a reliability assessment for the undrained bearing capacity of a surface strip foundation based on the results of a probabilistic study in which the shear strength and unit weight of cement-treated ground are represented as random fields in Monte Carlo simulations of undrained stability using numerical limit analyses. The results show how the bearing capacity is related to the coefficient of variation and correlation length scale in both shear strength and unit weight. Based on the results, the authors propose an overdesign factor, tolerable percentage of defective core specimens, and resistance factors for LRFD ultimate limit state of surface footings on cement-treated ground in order to achieve a target reliability index and probability of failure. The proposed method is illustrated through example calculations based on the spatial variation of unconfined compressive strength measured using a variety of cement-mixing methods from projects in Japan. (c) 2012 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：600 / 619

页数：20

共 55 条

[1]

Abe T., 1997, P JAPANESE NATL C SO, P2353

[2]

[Anonymous], 1981, P 10 ICSMFE

[3]

Baecher G.B., 2003, Reliability and statistics in geotechnical engineering

[4] Ultimate bearing capacity of soft clays reinforced by a group of columns - Application to a deep mixing technique [J].