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| Model experiment investigation of earth pressure of the concrete-rockfill combination dam |
| LIU Yanchen1，2，LIU Hanlong3，4，YANG Gui1，2，LIU Ping1，2 |
(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing，
Jiangsu 210098，China；2. College of Civil and Transportation Engineering，Hohai University，Nanjing，Jiangsu 210098，China；3. Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education，Chongqing University，Chongqing 400045，China；4. Colleage of Civil Engineering，Chongqing University，Chongqing 400045，China) |
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Abstract Concrete-rockfill combination dam(CRC dam) is a new type of dams. The stability of the concrete wall and the whole dam was influenced by the value and distribution of earth pressure. A model test was carried out to measure the distribution of earth pressure along the height of the wall and to investigate the displacement mode in rock filling and water impoundment periods. According to the results of loading and unloading triaxial test，the non-linear relationships between the wall displacement and the mobilized internal friction angle，the friction angle between the concrete wall and the rockfill were established under the quasi-limit state. The concept of initial displacement was proposed，and a calculation method of quasi-limit state earth pressure considering the displacement was deduced. The result shows that the displacement of the concrete wall was mainly the mode of translation. Earth pressure varied with the displacement of the concrete wall obviously，and the earth pressure at the end of impoundment period was approximate twice than that in the filling period. The proposed formula reflected well the change of earth pressure with wall displacement and is an effective supplement to Coulomb?s theoretical formula.
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| [1] 刘汉龙，肖 杨，丁选明，等. 一种混凝土–堆石混合坝及其施工方法[P]. 中国，101718086，2009–11–05.(LIU Hanlong，XIAO Yang，DING Xuanming，et al. A concrete-rockfill combination dam and its construction method[P]. China，101718086，2009–11–05.(in Chinese))
[2] 刘汉龙，刘彦辰，杨 贵，等. 新型混凝土–堆石混合坝的基本力学特性[J]. 河海大学学报：自然科学版，2013，41(5)：417–423.(LIU Hanlong，LIU Yanchen，YANG Gui，et al. Basic features of a new dam type：concrete-rockfill combination dam[J]. Journal of Hohai University：Natural Science，2013，41(5)：417–423.(in Chinese))
[3] CHANG M F. Lateral earth pressure behind rotating walls[J]. Canadian Geotechnical Journal，1997，34(2)：498–509.
[4] FANG Y S，CHEN T J，WU B F. Passive earth pressures with various wall movements[J]. Journal of Geotechnical Engineering，1994，120(8)：1 307–1 323.
[5] FANG Y S，ISHIBASHI I. Static earth pressures with various wall movements[J]. Journal of Geotechnical Engineering，1986，112(3)：317–333.
[6] 梅国雄，宰金珉. 考虑位移影响的土压力近似计算方法[J]. 岩土力学，2001，22(4)：83–85.(MEI Guoxiong，ZAI Jinmin. Earth pressure calculating method considering displacement[J]. Rock and Soil Mechanics，2001，22(4)：83–85.(in Chinese))
[7] 宋林辉，梅国雄，宰金珉，等. 土压力研究中的两种思路[J]. 岩土力学，2006，27(增2)：1 183–1 187.(SONG Linhui，MEI Guoxiong，ZAI Jinmin，et al. Two kinds of ways to research soil pressure[J]. Rock and Soil Mechanics，2006，27(Supp.2)：1 183–1 187.(in Chinese))
[8] 李 蓓，赵锡宏. 一种考虑挡土墙变形的深基坑非线性土压力方法[J]. 岩土力学，2004，25(增2)：453–458.(LI Bei，ZHAO Xihong. A nonlinear earth pressure method for deep excavation considering deformation of retaining wall[J]. Rock and Soil Mechanics，2004，25(Supp.2)：453–458.(in Chinese))
[9] 卢坤林，杨 扬. 考虑位移影响的主动土压力近似计算方法[J]. 岩土力学，2009，30(2)：553–557.(LU Kunlin，YANG Yang. Approximate calculation method of active earth pressure considering displacement[J]. Rock and Soil Mechanics，2009，30(2)：553–557.(in
Chinese))
[10] 蒋 波，应宏伟，谢康和，等. 平动模式下挡土墙非极限状态主动土压力计算[J]. 中国公路学报，2005，18(2)：24–27.(JIANG Bo，YING Hongwei，XIE Kanghe，et al. Computation of active earth pressue under non-limit state for retaining wall with mode of translation[J]. China Journal of Highway and Transport，2005，18(2)：24–27.(in Chinese))
[11] 龚 慈. 不同位移模式下刚性挡土墙土压力计算方法研究[硕士学位论文][D]. 杭州：浙江大学，2005.(GONG Ci. Earth pressure against rigid retaining wall of different movement modes[M. S. Thesis][D]. Hangzhou：Zhejiang University，2005.(in Chinese))
[12] 黄 斌，杨 洪，何晓民. 非极限状态主动土压力的研究[J]. 长江科学院院报，2007，24(4)：46–49.(HUANG Bin，YANG Hong，HE Xiaomin. Research on active earth pressure under non-limit state[J]. Journal of Yangtze River Scientific Research Institute，2007，24(4)：46–49.(in Chinese))
[13] ZHANG J MTOKIMATSU K. Evaluation of earth pressure under any lateral deformation[J]. Soils and Foundations，1998，38(1)：15–33.
[14] 卢坤林，杨 扬. 非极限主动土压力计算方法初探[J]. 岩土力学，2010，31(2)：615–629.(LU Kunlin，YANG Yang. Preliminary study of active earth pressure under nonlimit state[J]. Rock and Soil Mechanics，2010，31(2)：615–629.(in Chinese))
[15] 陈奕柏，柯才桐，高洪波，等. 考虑变位影响的刚性挡墙非极限土压力研究[J]. 岩石力学与工程力学，2015，34(5)：1 060– 1 070.(CHEN Yibai，KE Caitong，GAO Hongbo，et al. Non-limit state earth pressure against retaining wall considering influence of deformation[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(5)：1 060–1 070.(in Chinese))
[16] 中华人民共和国行业标准编写组. SL237—1999土工试验规程[S]. 北京：中国水利水电出版社，1999.(The Professional Standards Compilation Group of People—1999 Specification of soil test[S]. Beijing：China Water Power Press，1999.(in Chinese))
[17] ASCE. Retaining and flood walls[S]. New York：ASCE Press，1994.
[18] 等. 20051 700，LEI Guohui，AI Yingbo，et al. Stress path controlled triaxial experimental study of lateral earth pressure behaviour[J]. Rock and Soil Mechanics，2005，26(11)：1 700–1 704.(in Chinese))
[19] 等. 20101)3 112. (MEI Guoxiong，CHEN Hao，LU Tinghao，et al. Research on lateral stress-strain relation on side of foundation pit with lateral unloading[J]. Chinese Journal of Rock Mechanics and Engineering，20103 108[20] [J]. 32(10) 1 553.(CHEN Hao，MEI Guoxiong，LI Zhi. Deformation characteristics of the soil around the foundation pit with lateral unloading[J]. Journal of Hefei University of Technology：Natural Science，2009 1 551[21] MATSUZAWA H，HAZARIKA H. Analysis of active earth pressure against rigid retaining wall subjected to different modes of movement[J]. Soils and Foundations，1996，36(3)：51–65.
[22] 章瑞文，徐日庆，郭 印. 水利学报，2008，39(2)：250，XU Riqing，GUO Yin. Distribution of active earth pressure acting on retaining walls with soil placed in layers and condidering the displacement of wall[J]. Journal of Hydraulic Engineering，2008，39(2)：250 |
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2016, Vol. 35 
