Mechanism analysis of structured loess fracturing grouting

doi:10.6052/j.issn.1000-4750.2018.01.0067

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Mechanism analysis of structured loess fracturing grouting
	Zhou, Ming-Ru 1,2; Lu, Guo-Wen 1,2; Wang, Teng 1,2; Wang, Jin-Wei 3
刊名	Gongcheng Lixue/Engineering Mechanics
	2019-03-01
卷号	36 期号:3 页码:169-181
关键词	Cams Concrete construction Deformation Expansion Grading Grouting Mortar Reliability analysis Reliability theory Sediments Soil mechanics Soils Cavity expansion theory Fracturing grouting Large deformation theories Modified Cam-clay model Rock and soil mechanics
ISSN号	10004750
DOI	10.6052/j.issn.1000-4750.2018.01.0067
英文摘要	Based on the theory of plastic mechanics and large-deformation, this paper analyzes the mechanical mechanism of fracturing grouting in loess area. It treats the early phase of grouting as the problem of cavity expansion in infinite soil and divides the stress distribution due to the cavity expansion in soil into three zones: elastic zone, plastic zone and damage zone. Combined with the modified Cam-clay model of structural loess, the deformation following small deformation assumption in elastic zone and large deformation assumption in plastic and damage zones is taken into consideration. According to the stress equilibrium equation and stress-strain continuous boundary conditions, the radius of the plastic and damage zones, the vertical and horizontal fracturing grouting pressures are deduced considering the drainage conditions and large deformation. Finally, the paper demonstrates these by engineering cases. The results show that the solution takes into account the structural parameters, compressive modulus, Poisson's ratio, internal friction angle, damage coefficient, dilatancy coefficient, form of expanding, k, yield criterion and so on. At the same time, the stress-strain distribution solution for the soil around the slurry and the grading regularity of them under the influence of the parameters are analyzed. The comparative analysis shows that the calculated value of the fracturing grouting pressure is very close to the measured value in projects, which preliminarily verifies the reliability of the theory. Therefore, the paper has considerable practical value in fracturing grouting in loess area. © 2019, Engineering Mechanics Press. All right reserved.
语种	中文
出版者	Tsinghua University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114254]
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 3.School of Hydraulic Engineering, Dalian University of Technology, Dalian; Liaoning; 116024, China
推荐引用方式 GB/T 7714	Zhou, Ming-Ru,Lu, Guo-Wen,Wang, Teng,et al. Mechanism analysis of structured loess fracturing grouting[J]. Gongcheng Lixue/Engineering Mechanics,2019,36(3):169-181.
APA	Zhou, Ming-Ru,Lu, Guo-Wen,Wang, Teng,&Wang, Jin-Wei.(2019).Mechanism analysis of structured loess fracturing grouting.Gongcheng Lixue/Engineering Mechanics,36(3),169-181.
MLA	Zhou, Ming-Ru,et al."Mechanism analysis of structured loess fracturing grouting".Gongcheng Lixue/Engineering Mechanics 36.3(2019):169-181.