Settlement Calculation for Unsaturated Soil Foundation Based on the Van Genuchten Model of SWCC

 

Jun Feng

Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China
e-mail: sckid1987@163.com

Xi-yong Wu

Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China
e-mail: wuxiyong@126.com

Bao-long Zhu

Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China

Qi-Xiang Yang

Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China

 

 ABSTRACT

According to Bishop’s effective stress principle and based on the Van Genuchten model of SWCC, a settlement calculation formula for unsaturated soil foundation under the load of embankment was developed. The settlement for unsaturated soil foundation of He-Xuan railway was calculated by the formula which the parameters were obtained by indoor tests. At last, the calculated value was compared with the monitored value. The results showed that the difference between the calculated value and monitored value were so small which verified the applicability of the formula. What’s more, the calculated value was slightly larger than the monitored value. It may be safer to use the theoretical formula for settlement calculation in settlement controlling engineering of railway.

Keywords: SWCC; unsaturated soil; railway foundation; settlement; Van Genuchten model

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