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浙江大学学报(工学版)
浙江大学学报(工学版)  2018, Vol. 52 Issue (12): 2279-2284    DOI: 10.3785/j.issn.1008-973X.2018.12.005
土木工程     
桩承式路堤中加筋褥垫层的工作性状
庄妍1,2, 程欣婷2, 肖衡林3, 刘奂孜2, 周倍合2, 李嘉俊2
1. 东南大学土木工程学院 混凝土及预应力混凝土结构教育部重点实验室, 江苏 南京 210096;
2. 河海大学岩土力学与堤坝工程教育部重点实验室, 江苏省岩土工程技术工程研究中心, 江苏 南京 210098;
3. 湖北工业大学 土木工程与建筑学院, 湖北 武汉 430068
Working performance of reinforced cushion in piled embankment
ZHUANG Yan1,2, CHENG Xin-ting2, XIAO Heng-lin3, LIU Huan-zi2, ZHOU Bei-he2, LI Jia-jun2
1. School of Civil Engineering, Key Laboratory for RC and PRC Structures of Education Ministry, Southeast University, Nanjing 210096, China;
2. Jiangsu Research Center for Geotechnical Engineering Technology, Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
3. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan 430068, China
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摘要：

建立桩承式加筋路堤三维有限元模型，对比分析多层土工格栅与单层土工格栅情况下软土表面沉降、软土表面竖向应力与加筋体应变的分布规律.研究发现：软土表面的沉降仅与土工格栅的总强度有关，而土工格栅的层数对软土表面的沉降影响不大；对比单层与三层加筋体模型结果可知，三层加筋体能更明显地减小作用在软土中心的竖向应力，从而使得两桩之间的竖向应力分布更加均匀.在土工格栅总强度相同的情况下，多层加筋体底层土工格栅的最大应变是单层加筋体的1.38~1.50倍.
Abstract:

A three-dimensional finite element model of geosynthetic-reinforced piled embankment was established. The distribution law including the settlement of subsoil surface, the stress of subsoil surface and the strain of geogrid were analyzed by comparing the results of the embankment reinforced by single and multiple layers of geogrid. It is found that the settlement of subsoil surface obviously depends on the total stiffness of geogrid, while is slightly influenced by the number of geogrid layers. Compared with the results of the embankment reinforced by single layer geogrid, three layers geogrid can more obviously reduce the vertical stress acting on the center of subsoil, and therefore resulting in more uniformly distribution of the vertical stress between piles. It also can be observed that the maximum geogrid strain for the bottom layer geogrid is approximately 38% to 50% larger than that of the single layer geogrid under the condition that the total stiffness of geogrid is the same.
收稿日期: 2017-11-22 出版日期: 2018-12-13
CLC:  TU470  
基金资助:

国家自然科学基金资助项目（51478166）；“青蓝工程”资助项目；中央高校基本科研业务费专项资金资助项目（3205008801）；江苏省高校优势学科建设工程资助项目（1105007138）；“111”计划资助项目（B13024）
作者简介: 庄妍(1982-),女,教授,博导,从事软土地基加固和路面安定性分析研究.orcid.org/0000-0003-0229-8640.E-mail:Joanna_zhuang@163.com
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引用本文:

庄妍, 程欣婷, 肖衡林, 刘奂孜, 周倍合, 李嘉俊. 桩承式路堤中加筋褥垫层的工作性状[J]. 浙江大学学报(工学版), 2018, 52(12): 2279-2284.

ZHUANG Yan, CHENG Xin-ting, XIAO Heng-lin, LIU Huan-zi, ZHOU Bei-he, LI Jia-jun. Working performance of reinforced cushion in piled embankment. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(12): 2279-2284.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2018.12.005    或    http://www.zjujournals.com/eng/CN/Y2018/V52/I12/2279

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