安庆组黏土砾石层胶结特性及边坡冲蚀破坏模式

doi:10.13722/j.cnki.jrme.2021.0675

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

Download: PDF (9378 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The clay gravel layer of the Anqing Formation is widely distributed in the upper reaches along the Yangtze River in Anhui Province. It is a special engineering geological body composed of gravel and clay. After the excavation of the project，it is very easy to cause slope collapse. In this paper，the clay gravel bed of the Anqing Formation was studied. Firstly，the type and composition of cement in the clay gravel bed were analyzed by X-ray diffraction method，and the cementation characteristics of the clay gravel layer were clarified，including matrix cementation and soil-stone interface cementation. Then，the experiment of artificial rain erosion model in the slope of clay gravel bed was carried out，and the variation law of slope destruction instability pattern of clay gravel layer with different gravel content was studied. The results show that when the gravel content is small (30%)，the slope failure is mainly dominated by gully，and its failure form is mainly controlled by the clay layer. When the gravel content increases to 50%，the gravel skeleton effect is gradually reflected，and the slope failure form is greatly different from the soil slope. The slope failure is manifested as the evolution of erosion hole - erosion pit - shallow layer collapse. When the gravel content is large (70%)，the gravel skeleton structure is relatively stable. Even if the clay particles are washed away in large quantities，the overall stability of the slope is better. Finally，the variation of substrate moisture content and wet peak migration depth of slopes with different gravel content were analyzed，and the internal mechanism of slope failure of clay gravel layer was further explained.

Key words： soil mechanics clay gravel bed cementation gravel content erosion failure mode wetting peak migration

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DUAN Haipeng1
	YU Fei2
	HUANG Kang2
	DAI Zhangjun2
	CHEN Shanxiong2

Cite this article:

DUAN Haipeng1,YU Fei2,HUANG Kang2, et al. Cementation characteristics of clay gravel layer and erosion failure mode of slope in Anqing Formation[J]. , 2022, 41(S1): 2801-2811.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0675 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS1/2801

[1] 油新华，汤劲松. 土石混合体野外水平推剪试验研究[J]. 岩石力学与工程学报，2002，21(10)：1 537–1 540.(YOU Xinhua，TANG Jinsong. Field horizontal shear test of soil-rock mixture[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(10)：1 537– 1 540.(in Chinese))
[2] 胡瑞林，李晓，王宇，等. 土石混合体工程地质力学特性及其结构效应研究[J]. 工程地质学报，2020，28(2)：255–281.(HU Ruilin，LI Xiao，WANG Yu，et al. Engineering geomechanical properties and structural effects of soil-rock mixtures[J]. Journal of Engineering Geology，2020，28(2)：255–281.(in Chinese))
[3] 金磊，曾亚武，张森. 块石含量及形状对胶结土石混合体力学性能影响的大型三轴试验[J].岩土力学，2017，38(1)：141– 149.(JIN Lei，ZENG Yawu，ZHANG Sen. Large-scale triaxial test on the influence of mass stone content and shape on the mechanical properties of cemented soil-rock mixture[J]. Rock and Soil Mechanics，2017，38(1)：141–149.(in Chinese))
[4] 夏加国，胡瑞林，祁生文，等. 含超径颗粒土石混合体的大型三轴剪切试验研究[J]. 岩石力学与工程学报，2017，36(8)：2 031–     2 039.(XIA Jiaguo，HU Ruilin，QI Shengwen，et al. Large scale triaxial shear test of soil-rock mixture with super diameter particles[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(8)：2 031–2 039.(in Chinese))
[5] 黄康，戴张俊，余飞，等. 考虑水环境与外荷载的安庆组黏土砾石层原位强度特性[J]. 岩土力学，2020，41(增2)：1–9.(HUANG Kang，DAI Zhangjun，YU Fei，et al. In-situ strength characteristics of clay gravel bed in Anqing Formation considering water environment and external load[J]. Rock and Soil Mechanics，2020，41(Supp.2)：1–9.(in Chinese))
[6] 乾增珍，盛明强，田开平. 戈壁碎石土胶结作用机制及其微观力学模型研究[J]. 岩土力学，2017，38(增2)：138–144.(QIAN Zengzhen， SHENG Mingqiang，TIAN Kaiping. Cementation mechanism and micromechanical model of Gobi gravel soil[J]. Rock and Soil Mechanics，2017，38(Supp.2)：138–144.(in Chinese))
[7] NIE Z H，LI K，XIA J. Research on coarse-grained soil collapsibility in Gobi region[J]. Advanced Materials Research，2012，446–449：   1 450–1 453.
[8] DE VENTE J，POESEN J. Predicting soil erosion and sediment yield at the basin scale：Scale issues and semi-quantitative models[J]. Earth-Science Reviews，2005，71(1/2)：95–125.
[9] GOVERS G，GIMENEZ R，VAN O K. Rill erosion：exploring the relationship between experiments，modelling and field observations[J]. Earth-Science Reviews，2007，84(3/4)：87–102.
[10] BRYAN R B，ROCKWELL D L. Water table control on rill initiation and implications for erosional response[J]. Geomorphology，1998，23(2/4)：151–169.
[11] MANCILLA G A，CHEN S，MCCOOL D K. Rill density prediction and flow velocity distributions on agricultural areas in the Pacific Northwest[J]. Soil and Tillage Research，2005，84(1)：54–66.
[12] SHEN H O，ZHENG F L，WANG L，et al. Effects of rainfall intensity and topography on rill development and rill characteristics on loessial hillslopes in China[J]. Journal of Mountain Science，2019，16(10)：2 299–2 307.
[13] ZHAO L S，HOU R，WU F Q，et al. Effect of soil surface roughness on infiltration water，ponding and runoff on tilled soils under rainfall simulation experiments[J]. Soil and Tillage Research，2018，       17 947–17 953.
[14] AN J，ZHENG F L，LU J，et al. Investigating the role of raindrop impact on hydrodynamic mechanism of soil erosion under simulated rainfall conditions[J]. Soil Science，2012，177(8)：517–526.
[15] 宋朋燃. 黄土边坡冲刷破坏特征及数值模拟[博士学位论文][D]. 吉林：吉林大学，2013.(SONG Pengran，Characteristics and numerical simulation of erosion failure of loess slope[Ph. D. Thesis][D]. Jilin：Jilin University，2013.(in Chinese))
[16] 任佳宽. 吉林省镇赉地区分散性土冲刷机制研究[硕士学位论文][D].吉林：吉林大学，2017.(REN Jiakuan. Research on scour mechanism of dispersed soil in Zhenlai area of Jilin Province[M. S. Thesis][D]. Jilin：Jilin University，2017.(in Chinese))
[17] 苏晶文，龚建师，李运怀，等. 基于地层结构组合的第四纪地质单元划分研究—以皖江经济带沿江丘陵平原区为例[J]. 中国地质调查，2019，6(5)：28–35.(SU Jingwen，GONG Jianshi，LI Yunhuai，et al. Quaternary geological unit division based on stratigraphic structure assemblage：A case study of the hilly plain along the Yangtze River in Wanjiang economic belt[J]. Geological Survey of China，2019，6(5)：28–35.(in Chinese))
[18] 朱光. 用伊利石结晶度确定碎屑沉积岩甚低级变质等级[J]. 石油勘探与开发，1995，(1)：33–35.(ZHU Guang. Determination of very low metamorphic grade of clastic sedimentary rocks by illite crystallinity[J]. Petroleum Exploration and Development，1995，(1)：33–35.(in Chinese)).
[19] JONES B，LOCKART E B，SQUAIR C. Phreatic and vadose cements in the tertiary bluff formation of grand cayman island，British West Indies[J]. Bulletin of Canadian Petroleum Geology，1984，32(4)：382–397.
[20] HUANG K，DUAN H P，YI Y L，et al. Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer[J]. Geofluids，2021：5559052
[21] ZHOU Z，YANG H，WANG X C，et al. Model development and experimental verification for permeability coefficient of soil- rock mixture[J]. International Journal of Geomechanics，2017，17(4)：10.