考虑垂直分布因素的松散弃渣土力学特性试验研究

doi:10.13722/j.cnki.jrme.2021.0194

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (7295 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Loose spoil slopes are naturally formed under gravity throwing(rolling) and prone to be instable for the loose structure of spoil under the circumstance of external environment. At present，there are few studies on the engineering characteristics of loose spoil. In this paper，a high loose spoil slope in a hydropower project was taken as the research object. Considering the distribution characteristics of particle configuration，four sampling lines along the vertical direction on the slope surface were arranged and a series of sampling，measurement and engineering characteristic tests of loose spoil were conducted. A new method for obtaining the natural density of loose rock and soil aggregates was proposed and verified by large-scale triaxial compression test. The research conclusions are as follows：(1) The field relative density of loose spoil is between 0.50 and 0.55，increasing along the vertical direction from top to downward. (2) Large deformation feature is the main engineering problem for loose spoil. During the process of large deformation，the spherical stress p well follows a linear relationship with the volume strain ev，whereas the bulk modulus B is linearly independent of the stress level s，only changing with the confining pressure s3. The Duncan-Zhang E-B model is more suitable for loose spoil. The failure stress ratio Rf of loose spoil is about 0.65，and loose spoil generally exhibits strain hardening characteristics. There¢s no peak deviator stress on stress-strain curves when the axial strain reaches 15%，and the mechanical mechanism of loose spoil can be summarized as large friction deformation of unstable granular materials. (3) The volume modulus B and the confining pressure s3 of loose spoil with different sampling heights have a good linear relationship，and the intercept of B on the stress coordinate axis is about equal to 0. The above conclusions are conducive to simplify calculation and to predict the deformation of loose spoil，also identifying the structure instability of loose spoil on the free surface.

Key words： soil mechanics loose spoil lvertical distribution natural density mechanical characteristics experimental study

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	JIANG Jiwei
	PAN Jiajun
	CHENG Zhanlin
	XU Han
	TAN Fan

Cite this article:

JIANG Jiwei,PAN Jiajun,CHENG Zhanlin, et al. Experimental study on mechanical properties of loose spoil considering vertical distribution factor[J]. , 2022, 41(3): 631-639.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0194 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I3/631

[1]	陈红旗，黄润秋，林峰. 大型堆积体边坡的空间工程效应研究[J]. 岩土工程学报，2005，27(3)：323-328.(CHEN Hongqi，HUANG Runqiu，LIN Feng. Study on the spatial engineering effect of large accumulation slope[J]. Chinese Journal of Geotechnical Engineering，2005，27(3)：323-328.(in Chinese))
[2]	ROBIN F，JORDI C，CHRISTOPHE B，et al. Guidelines for landslide susceptibility，hazard and risk zoning for land use planning[J]. Engineering Geology，2008，102(3/4)：85-98.
[3]	王晶. 新形势下大型水利工程弃渣场优化配置研究[J]. 中国水土保持，2018，(3)：27-30.(WANG Jing. Study on the optimal allocation of waste disposal area of large-scale water conservancy project in the new situation[J]. Soil and Water Conservation in China，2018，(3)：27-30.(in Chinese))
[4]	张勇，姚赫，江宁，等. 基于经验统计的弃渣场失稳致灾距预测模型研究[J]. 人民长江，2017，48(12)：65-69.(ZHANG Yong，YAO He，JIANG Ning，et al. Amodel for influencing distance prediction of landslide clastic flow in slag site based on empirical statistics[J]. Yangtze River，2017，48(12)：65-69.(in Chinese))
[5]	袁普金，姚赫，张勇，等. 生产建设项目弃渣场安全选址方案研究[J]. 水土保持通报，2018，38(6)：132-137.(YUAN Pujin，YAO He，ZHANG Yong，et al. Investigation of site selection for slag abandonment yard of production and construction projects[J]. Bulletin of Soil and Water Conservation，2018，38(6)：132-137.(in Chinese))
[6]	孙朝燚，陈从新，郑允，等. 基于空间效应的弃渣场边坡稳定性方法探讨[J]. 西南交通大学学报，2019，54(1)：97-105.(SUN Chaoyi，CHEN Congxin，ZHENG Yun，et al. Discussion on slope stability analysis method of abandoned dreg site based on spatial effect[J]. Journal of Southwest Jiaotong University，2019，54(1)：97-105.(in Chinese))
[7]	吴谦，毛雪松，刘龙旗，等. 某弃渣场边坡稳定性的可靠度分析[J]. 桂林理工大学学报，2017，37(3)：475-480.(WU Qian，MAO Xuesong，LIU Longqi，et al. Stability reliability analysis of an abandoned dreg site slope[J]. Journal of Guilin University of Technology，2017，37(3)：475-480.(in Chinese))
[8]	郭佳. 渣土堆积体边坡稳定性分析——以连霍高速改扩建工程渣土边坡为例[硕士学位论文][D]. 郑州：华北水利水电大学，2018.(GUO Jia. Slope stability analysis of the abandoned soil accumulation filed-a case study on the slope of the lianhu expressway reconstruction project[M. S. Thesis][D]. Zhengzhou：North China University of Water Resources and Electric Power，2018.(in Chinese))
[9]	周昌群. 山区高速公路弃渣场稳定性及关键技术控制研究[硕士学位论文][D]. 重庆：重庆交通大学，2018.(ZHOU Changqun. Study on stability and key technology control of the waste slag field in mountainous expressway[M. S. Thesis][D]. Chongqing：Chongqing Jiaotong University，2018.(in Chinese))
[10]	中华人民共和国行业标准编写组. NB/T 35111—2018 水电工程渣场设计规范[S]. 北京：中国水利水电出版社，2018.(The Professional Standards of People¢s Republic of China. NB/T 35111—2018 Design code for spoil areas of hydropower projects[S]. Beijing：China Water and Power Press，2018.(in Chinese))
[11]	中华人民共和国国家标准编写组. GB/T 50123—2019 土工试验方法标准[S]. 北京：中国计划出版社，2019.(The National Standards Compilation Group of People¢s Republic of China. GB/T 50123—2019 Standard for geotechnical testing method[S]. Beijing：China Planning Press，2019.(in Chinese))
[12]	DUNCAN J，CHANG C Y. Non-linear analysis of stresses and strain in soils[J]. Journal of the Soil Mechanics and Foundation Division，ASCE，1970，SM5：1 629-1 653.