Analytical analysis on the expansion of cylindrical cavity in unsaturated soils under different drainage conditions

doi:10.6052/0459-1879-20-439

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	Analytical analysis on the expansion of cylindrical cavity in unsaturated soils under different drainage conditions
	Zhou, Fengxi 2,3; Mu, Zhanlin 3; Yang, Ruxian 1; Zhang, Yasen 3
刊名	Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics
	2021-05-18
卷号	53 期号:5 页码:1496-1509
关键词	Composite structures Drainage Elastoplasticity Expansion Grouting Numerical methods Oil wells Petroleum analysis Petroleum reservoir evaluation Soil mechanics Soils Stresses Cylindrical cavity expansion Intermediate principal stress Intermediate principal stress effects Momentum balance equations Practical engineering problems Saturated and unsaturated soils Unified strength theory Unsaturated soil mechanics
ISSN号	04591879
DOI	10.6052/0459-1879-20-439
英文摘要	The existing expansion theory of cylindrical cavity has been able to provide theoretical basis for such as the wellbore stability evaluation in petroleum engineering and side pressure and cone penetration experiment analysis. But it is rarely applied in practical engineering problems such as unsaturated foundation pressure grouting and composite foundation treatment. Based on the theory of elastoplasticity and the principle of unsaturated soil mechanics, this paper adopts the unified strength theory to analyze the problem of cylindrical cavity expansion in unsaturated soil. Firstly, the soil around the cylindrical cavity is divided into the elastic zone and plastic zone and consider following the small strain theory in the elastic zone and the large strain theory in the plastic zone, and considering the influence of intermediate principal stress and inter-grain suction on the strength of unsaturated soil. Secondly, applying the unified strength criterion expressed by effective stress, based on basic equations such as constitutive relations, geometric equations, and momentum balance equations, combined with the corresponding boundary conditions. Finally, the analytical expressions of the stress field, strain field, displacement field and limit reaming pressure in the surrounding elastic-plastic region when the cylindrical cavity expands under different drainage conditions are obtained. Through numerical examples and parameter analysis, while degenerating verification with the existing expansion theory of cylindrical cavity in saturated and unsaturated soils, the influence laws of suction, dilatancy parameters, intermediate principal stress effect parameters and initial radial effective stress on the stress field, strain field and displacement field in the elasto-plastic region are analyzed. So as to verify the correctness and effectiveness of the theory in this article, in order to provide a reasonable theoretical basis for the later practical engineering problems. © 2021, Chinese Journal of Theoretical and Applied Mechanics Press. All right reserved.
语种	中文
出版者	Chinese Society of Theoretical and Applied Mechanics
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150969]
专题	土木工程学院
作者单位	1.Gansu Jiantou Construction Co. LTD, Lanzhou; 730050, China 2.Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou; 730050, China; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Zhou, Fengxi,Mu, Zhanlin,Yang, Ruxian,et al. Analytical analysis on the expansion of cylindrical cavity in unsaturated soils under different drainage conditions[J]. Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics,2021,53(5):1496-1509.
APA	Zhou, Fengxi,Mu, Zhanlin,Yang, Ruxian,&Zhang, Yasen.(2021).Analytical analysis on the expansion of cylindrical cavity in unsaturated soils under different drainage conditions.Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics,53(5),1496-1509.
MLA	Zhou, Fengxi,et al."Analytical analysis on the expansion of cylindrical cavity in unsaturated soils under different drainage conditions".Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics 53.5(2021):1496-1509.