带加强节点土工格栅加筋路堤动力响应的颗粒流分析

上海交通大学学报（自然版） ›› 2015, Vol. 49 ›› Issue (07): 957-960.

带加强节点土工格栅加筋路堤动力响应的颗粒流分析

邱成春1，张孟喜2，王一鸣3

(1. 盐城工学院土木工程学院，江苏盐城 224051； 2. 上海大学土木工程系，上海 200072；3. 上海国际机场股份有限公司，上海 201202)

收稿日期:2014-09-30 出版日期:2015-07-30 发布日期:2015-07-30
基金资助:
国家自然科学基金项目(41372280)

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

QIU Chengchun1,ZHANG Mengxi2,WANG Yiming3

(1. College of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, China；2. Department of Civil Engineering, Shanghai University, Shanghai 200072, China;3. Shanghai International Airport Co. Ltd, Shanghai 201202, China)

Received:2014-09-30 Online:2015-07-30 Published:2015-07-30

摘要/Abstract

摘要：

摘要：采用基于离散元理论的颗粒流软件建立了路堤二维数值模型，研究了交通荷载下无筋路堤、普通土工格栅加筋和带加强节点土工格栅加筋路堤的不同动力响应.通过比较不同工况的位移矢量图和颗粒接触力分布情况，发现由于加强节点的存在，带加强节点的土工格栅比普通土工格栅能更有效地减少路堤顶部的累积沉降，限制边坡的隆起；相比无筋路堤，加筋路堤的加载板正下方颗粒接触力集中形成柱状承载结构，能够有效地将上部荷载均匀传递给下部土体.
关键词：加筋路堤；土工格栅；加强节点；动力响应；颗粒流
中图分类号： TU 416.1文献标志码： A

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)

邱成春1，张孟喜2，王一鸣3. 带加强节点土工格栅加筋路堤动力响应的颗粒流分析[J]. 上海交通大学学报（自然版）, 2015, 49(07): 957-960.

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.

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