Analysis of Dynamic Response of Embankment Reinforced with Geogrid with Strengthening Nodes Based on PFC2D

Abstract

Abstract:

Abstract： The embankments were simulated by the software of particle flow code based on the discrete element theory. Different dynamic responses were investigated in the cases of unreinforced embankment, embankment reinforced with traditional geogrid and embankment reinforced with geogrid with strengthening nodes. The displacement fields and the distribution of contact forces of soil particles in three cases were analyzed. Compared to the embankment reinforced with traditional geogrid, due to the existence of the strengthening nodes, the geogrid with strengthening nodes can effectively reduce the accumulated settlement of the embankment and restrict the lateral displacement of the slope. In the case of reinforced embankment, multiple vertical forcebearing columns develop below the loading platen, resulting in uniformly distributed forces within the embankment.

Key words: reinforced embankment, geogrid, strengthening nodes, dynamic response, particle flow code(PFC2D)

QIU Chengchun1,ZHANG Mengxi2,WANG Yiming3. Analysis of Dynamic Response of Embankment Reinforced with Geogrid with Strengthening Nodes Based on PFC2D[J]. Journal of Shanghai Jiaotong University, 2015, 49(07): 957-960.

References

［1］Vinod J S, Nagaraja S, Sitharam T G, et al. Numerical simulation of reinforced granular soils using DEM ［C］∥GeoFrontiers 2011: Advances in Geotechnical Engineering. Dallas：ASCE, 2011: 42424251.

［2］周健, 王家全, 曾远, 等. 土坡稳定分析的颗粒流模拟［J］. 岩土力学, 2009, 30(1): 8690.

ZHOU Jian, WANG Jiaquan, ZENG Yuan, et al. Simulation of slope stability analysis by particle flow code［J］. Rock and Soil Mechanics, 2009, 30(1): 8690.

［3］王宇, 李晓, 王声星, 等. 滑坡渐进破坏运动过程的颗粒流仿真模拟［J］. 长江科学院院报, 2012, 29(12): 4652.

WANG Yu, LI Xiao, WANG Shengxing, et al. PFC simulation of progressive failure process of landslide［J］. Journal of Yangtze River Scientific Research Institute, 2012, 29(12): 4652.

［4］李新坡, 何思明．节理岩质边坡破坏过程的PFC2D 数值模拟分析［J］．四川大学学报：工程科学版, 2010, 42(sup.1): 7075.

LI Xinpo, HE Siming. Numerical analysis of the failure of heavily jointed rock slopes using PFC2D［J］. Journal of Sichuan University (Engineering Science Edition), 2010, 42(sup.1): 7075.

［5］杨冰. 边坡动力破坏过程及塌落范围的颗粒力学模拟［D］. 北京: 清华大学土木工程系, 2011.

［6］邱成春. HV 加筋路堤动力特性的试验及颗粒流分析［D］. 上海: 上海大学土木工程系, 2013.

［7］李磊, 张孟喜, 周小凤,等. 带加强节点双向土工格栅的拉拔试验研究［J］. 水利学报, 2012, 43(12): 14941499.

LI Lei, ZHANG Mengxi, ZHOU Xiaofeng, et al. Pullout tests of biaxial geogrid with strengthening nodes［J］. Journal of Hydraulic Engineering, 2012, 43(12): 14941499.

［8］陈建峰, 李辉利, 柳军修, 等. 土工格栅与砂土的细观界面特性研究［J］. 岩土力学, 2011, 32(sup.1): 6671.

CHEN Jianfeng, LI Huili, LIU Junxiu, et al. Mesoscopic study of interface properties of geogridreinforced soil［J］. Rock and Soil Mechanics, 2011, 32(sup.1): 6671.

［9］刘汉龙, 高德清, 陈育民, 等. 筑坝反滤料动模量和阻尼比试验的颗粒流模拟［J］. 防灾减灾工程学报, 2009, 29(4): 361367.

LIU Hanlong, GAO Deqing, CHEN Yumin, et al. Simulation of dynamic modulus and damping ratio test on filter material by particle flow code［J］. Journal of Disaster Prevention and Mitigation Engineering, 2009, 29(4): 361367.

［10］Zhang M X, Qiu C C, Javadi A A, et al. Discreteelement method simulation of a model test of an embankment reinforced with horizontal–vertical inclusions［J］. Geosynthetics International, 2013, 20(4): 238251.

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