Earth pressure of deep foundation pit effected by additional stress field of expansive soil

被引：0
|
作者：
Chao F. [1 ,2 ]
Wang M. [1 ,2 ]
Shu D. [1 ,2 ]
Yu L. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2016年 / 47卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Additional stress field; Deep foundation pit; Earth pressure; Expansive soil;
D O I：
10.11817/j.issn.1672-7207.2016.09.036
中图分类号：
学科分类号：
摘要：
Additional stress field of expansive soil caused by moisture change was simulated by virtual temperature stress field, in which solution of relative thermal expansion coefficient β was proposed and equation of temperature change and moisture change was gained. A case study of some deep foundation pit in expansive soil strata in Hefei was done. The distribution of earth pressure of different displacement of translation mode (T) and rotating about base mode (RB) was proved up and modification of calculation method of earth pressure of deep foundation pit was proposed, in which additional stress field caused by maximum monthly rainfall and moisture of the whole ground changed to saturated was considered. The results show that distribution of earth pressure will be affected by rainfall when displacement of envelope is less than 0.3%H(H represents the depth of pit), the largest impact position occurs at ground surface and decreased linearly. Increment of earth pressure is 0.44Pe and its influence depth is about 4 m. Increment of earth pressure is a fixed value when ground moisture is saturated, and the value is 0.57Pe. © 2016, Central South University Press. All right reserved.
引用
收藏
页码：3177 / 3182
页数：5
相关论文
共 22 条
  • [1] Day R.W., California housing damage related to expansive soils, Journal of Performance of Constructed Facilities, 8, 2, pp. 139-157, (1994)
  • [2] Liao S., Expansive Soil and Railway Engineering, pp. 1-17, (1984)
  • [3] GB/T 50279-2014, Standard for fundamental terms of geotechnical engineering
  • [4] Tan L., Kong L., Study of variation regularity of swelling behavior of expansive soil, Rock and Soil Mechanics, 25, 10, pp. 1555-1559, (2004)
  • [5] Chen S., Kong L., Guo A., Experimental research on engineering properties of expansive soil and lime stabilized soil, Rock and Soil Mechanics, 23, pp. 9-12, (2002)
  • [6] Zhou B., Chen S., Yu F., Et al., An in-situ testing method of swelling pressure on expansive soils, Rock and Soil Mechanics, 29, 12, pp. 3333-3336, (2008)
  • [7] Luo Q., Cai Y., Shao Q., Experimental study on gravity retaining wall filled with Chengdu clay, Journal of Southwest Jiaotong University, 30, 3, pp. 270-274, (1995)
  • [8] Clayton C.R.I., Symons I.F., Hiedra-Cobo, The pressure of clay backfill against retaining structures, Canadian Geotechnical Journal, 28, 4, pp. 282-297, (1991)
  • [9] Zhang Y., Laboratory investigations of three- dimensional swell-shrinking characteristics of expansive soils, Dam Observation and Geotechnical Tests, 5, 1, pp. 13-22, (1990)
  • [10] Xie Y., Chen Z., Sun S., Et al., Test research on three-dimensional swelling pressure of remolded expansive clay, Rock and Soil Mechanics, 28, 8, pp. 1636-1642, (2007)
123