川东红层原状滑带土饱水软化试验研究

doi:10.13722/j.cnki.jrme.2014.1003

Abstract
Figure/Table
References (25)
Related Citation (15)

Download: PDF (3035 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Consists of sandstone and mudstone，the red-bed slopes in the east of Sichuan province belong to high geological hazard-prone areas. The soft layer(especially muddy layer) in the slopes was prone to be softened by water with the reduce of its mechanical strength，which favors the development of potential sliding surface. With the aim of revealing the change law of microstructure and mechanical properties of samples，a series of experiments of the sampled undisturbed soil from landslide sliding zone under the saturated condition were carried out. The result shows that after saturating the internal structure of tested soil became loose，meanwhile the way of connection of soil particles changed from plane-plane to plane-edge，edge-edge. Both cohesion and internal friction angle variations follow an exponent curve and tend to be stable after soaking 10 days. According to this result，the softening effects on slope stability were analyzed by the limit equilibrium method. The calculation result shows that slope stability coefficient is reduced with the softening of soil of sliding surface. Some slopes may eventually tend to be unstable even though without the static water pressure from the rear crack of slope and uplift pressure from sliding surface. Therefore，the dramatical decrease of soil strength due to softening and saturating is considered as the important cause of slope failure in red bed regions. The research conclusion can provide an important basis to understand genetic mechanism of landslides and control hazards in Sichuan red bed area.

Key words： soil mechanics undisturbed slip soil microcosmic structure mechanical properties saturated softening stability calculation

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LI Jiang1
	2
	XU Qiang1
	HU Zeming2
	LIU Hangxiang1
	ZHANG Qun1
	LU Yuanhang1
	WANG Sen1

Cite this article:

LI Jiang1,2,XU Qiang1, et al. EXPERIMENTAL RESEARCH ON SOFTENING OF UNDISTURBED SATURATED SLIP SOIL IN EASTERN OF SICHUAN PROVINCE RED BED[J]. , 2015, 34(S2): 4333-4342.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1003 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4333

[1] 胡厚田，赵晓彦. 中国红层边坡岩体结构类型的研究[J]. 岩土工程学报，2006，28(6)：689–694.(HU Houtian，ZHAO Xiaoyan. Studies on rockmass structure in slope of red bed in China[J]. Chinese Journal of Geotechnical Engineering，2006，28(6)：689–694.(in Chinese))

[2] 黄绍槟，程强，胡厚田. 四川红层分布及工程环境特征研究[J]. 公路，2005，(5)：81–85.(HUANG Shaobin，CHENG Qiang，HU Houtian. A study on distribution of Sichuan red beds and engineering environment characteristics[J]. Highway，2005，(5)：81–85.(in Chinese))

[3] 王兰生，李曰国，詹铮. 四川西部1981年暴雨滑坡的形成机制及防治：大自然探索[M]. 成都：四川人民出版社，1982：44–46. (WANG Lansheng，LI Yueguo，ZHAN Zheng. Formation mechanism and control of landslides happened in 1981 in the western of Sichuan province[M]. Chengdu：Sichuan People's Publishing House，1982：44–46.(in Chinese))

[4] 范宣梅，许强，张倬元，等. 平推式滑坡成因机制研究[J]. 岩石力学与工程学报，2008，27(增2)：3 753–3 759.(FAN Xuanmei，XU Qiang，ZHANG Zuoyuan，et al. Study on genetic mechanism of translational landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 753–3 759.(in Chinese))

[5] 许强，范宣梅，李园，等. 板梁状滑坡形成条件、成因机制与防治措施[J]. 岩石力学与工程学报，2010，29(2)：242–250.(XU Qiang，FAN Xuanmei，LI Yuan，et al. Formation condition，genetic mechanism and treatment measures of palte-shaped landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：242–250.(in Chinese))

[6] 黄斌，傅旭东，谭凡，等. 含水率对滑带土强度及变形影响试验研究[J]. 岩土力学，2012，33(9)：2 613–2 618.(HUANG Bin，FU Xudong，TAN Fan，et al. Experimental study of relationship between water content and strength or deformation of slip soil[J]. Rock and Soil Mechanics，2012，33(9)：2 613–2 618.(in Chinese))

[7] 林锋，黄润秋. 滑带土强度对水的敏感性三轴试验研究[J]. 工程地质学报，2004，12(增1)：112–117.(LIN Feng，HUANG Runqiu. Study on the influence of variation of water content on shear strength of slip zone soil by triaxial test[J]. Journal of Engineering Geology，2004，12(Supp.1)：112–117.(in Chinese))

[8] 李保雄，苗天德. 红层软岩滑坡运移机制[J]. 兰州大学学报：自然科学版，2004，40(3)：95–98.(LI Baoxiong，MIAO Tiande. The sliding mechanism of red-mudstone layer landslides[J]. Journal of Lanzhou University：Natural Science，2004，40(3)：95–98.(in Chinese))

[9] 刘小丽，邓建辉，李广涛. 滑带土强度特性研究现状[J]. 岩土力学，2005，25(11)：1 849–1 854.(LIU Xiaoli，DENG Jianhui，LI Guangtao. Shear strength properties of slip soils of landslides：an overview[J]. Rock and Soil Mechanics，2005，25(11)：1 849–1 854.(in Chinese))

[10] 李金玉，杨庆，孟长江. 非饱和抗剪强度指标c，j值与含水率w的关系[J]. 岩土工程技术，2010，24(5)：243–247.(LI Jinyu，YANG Qing，MENG Changjiang. Relationship between water content w and unsaturated soil strenth indices c and j[J]. Geotechnical Engineering Technique，2010，24(5)：243–247.(in Chinese))

[11] 凌华，殷宗泽. 非饱和土强度随含水量的变化[J]. 岩石力学与工程学报，2007，26(7)：1 499–1 503.(LING Hua，YIN Zongze. Variation of unsaturated soil strength with water contents[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(7)：1 499–1 503. (in Chinese))

[12] 齐剑峰，张成兵，宋雪琳，等. 滑带土含水率与力学参数关系试验研究[J]. 长江科学院院报，2013，30(7)：91–94.(QI Jianfeng，ZHANG Chengbing，SONG Xuelin，et al. Experimental study on the relation between water content and mechanical properties of soils in sliding-zone[J]. Chinese Journal of Yangtze River Scientific Research Institute，2013，30(7)：91–94.(in Chinese))

[13] 周永昆，魏作安，朱彬，等. 滑带土厚度及含水率对其强度参数的影响[J]. 中国地质灾害与防治学报，2010，21(2)：25–29.(ZHOU Yongkun，WEI Zuoan，ZHU Bin，et al. Study on the effect about interlayer thickness and water content to the strength parameters of landslide soil[J]. The Chinese Journal of Geological Hazard and Control，2010，21(2)：25–29.(in Chinese))

[14] 周翠英，朱凤贤，张磊. 软岩饱水试验与软化临界现象研究[J]. 岩土力学，2010，31(6)：1 709–1 715.(ZHOU Cuiying，ZHU Fengxian，ZHANG Lei. Research on saturation test and softening critical phenomena of soft rocks[J]. Rock and Soil Mechanics，2010，31(6)：1 709–1 715.(in Chinese))

[15] 周翠英，邓毅梅，谭祥韶，等. 饱水软岩力学性质软化的试验研究与应用[J]. 岩石力学与工程学报，2005，24(1)：33–38.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao，et al. Experimental Research on the softening of mechanical properties of saturated soft rocks and application[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(1)：33–38.(in Chinese))

[16] 周翠英，邓毅梅，谭祥韶，等. 软岩在饱水过程中微观结构变化规律[J]. 中山大学学报：自然科学版，2003，42(4)：98–102.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao，et al. Research on the variation regularities of microstructures in the testing of interaction between soft rocks and water[J]. Acta Scientiarum Naturalium Universities Sunyatseni，2003，42(4)：98–102.(in Chinese))

[17] 王运生，吴俊峰，魏鹏，等. 四川盆地红层水岩作用岩石弱化时效性研究[J]. 岩石力学与工程学报，2009，28(1)：3 102–3 108. (WANG Yunsheng，WU Junfeng，WEI Peng，et a1. Research on time effect of rock weakening by water-rock interaction of redbeds in Sichuan basin[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：3 102–3 108.(in Chinese))

[18] 简文星，殷坤龙，马昌前，等. 万州侏罗纪红层软弱夹层特征[J]. 岩土力学，2005，26(6)：901–905.(JIAN Wenxin，YIN Kunlong，MA Changqian，et a1. Characteristics of incompetent beds in Jurassic red clastic rocks in Wanzhou[J]. Rock and Soil Mechanics，2005，26(6)：901–905.(in Chinese))

[19] 孔德坊. 工程岩土学[M]. 北京：地质出版社，1992：9–12.(KONG Defang. Engineering geotechnics[M]. Beijing：Geological Publishing House，1992：9–12.(in Chinese))

[20] 中华人民共和国国家标准编写组. GB 50112—2013膨胀土地区建筑技术规范[S]. 北京：中国建筑工业出版社，2013.(The National Standards Compilation Group of People¢s Republic of China. GB 50112—2013 Technical code for buildings in expansive soil regions[S]. Beijing：China Architecture and Building Press，2013.(in Chinese))

[21] 黄宏伟，车平. 泥岩遇水软化微观机制研究[J]. 同济大学学报：自然科学版，2007，35(7)：866–870.(HUANG Hongwei，CHE Ping. Research on micro-mechanism of softening and argilitization of mudstone[J]. Journal of Tongji University：Natural Science，2007，35(7)：866–870.(in Chinese))

[22] 刘长武，陆士良. 泥岩遇水崩解软化机制的研究[J]. 岩土力学，2000，21(1)：28–31.(LIU Changwu，LU Shiliang. Research on mechanism of mudstone degradation and softening in water[J]. Rock and Soil Mechanics，2000，21(1)：28–31.(in Chinese))

[23] 冒海军，郭印同. 黏土矿物组构对水化作用影响评价[J]. 岩土力学，2010，31(9)：2 723–2 728.(MAO Haijun，GUO Yintong. Evaluation of impact of clay mineral fabrics on hydration process[J]. Rock and Soil Mechanics，2010，31(9)：2 723–2 728.(in Chinese))

[24] 胡泽铭. 四川红层地区缓倾角滑坡成因机制研究[硕士学位论文][D]. 成都：成都理工大学，2013.(HU Zeming. Study on formation mechanism of the slow-inclination landslide in red stratum region，Sichuan[M. S. Thesis][D]. Chengdu：Chengdu University of Technology，2013.(in Chinese))

[25] 卢海峰，陈从新，沈强，等. 鄂西南巴东组红层边坡夹层成因及特性[J]. 水文地质工程地质，2010，(1)：54–61.(LU Haifeng，CHEN Congxin，SHEN Qiang，et al. Genesis characteristic of weak intercalation existed in the red-bed slope of Badong formation in southwestern Hubei province[J]. Hydrogeology Engineering Geology，2010，(1)：54–61.(in Chinese))