短加筋土挡墙墙后连接作用的离心模型试验研究

徐超; 罗玉珊; 贾斌; 陈洪帅

doi:10.11779/CJGE201601020

短加筋土挡墙墙后连接作用的离心模型试验研究 English Version

徐超^{1, 2},
罗玉珊^{1, 3},
贾斌¹,
陈洪帅⁴

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土工程与地下结构教育部重点实验室,上海 200092;
3. 上海申元岩土工程有限公司,上海 200040;
4. 上海建工七建集团,上海 200050

基金项目: 湖北省交通科学研究计划项目（2011-700-3-42）

详细信息

作者简介:
徐超（1965- ）,男,博士,教授,博士生导师,主要从事土工合成材料和地基加固方面的教学与科研工作。

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出版历程
- 收稿日期: 2014-12-18
- 发布日期: 2016-01-19

Effects of connection forms on shored mechanically stabilized earth walls by centrifugal model tests

XU Chao^{1, 2},
LUO Yu-shan^{1, 3},
JIA Bin¹,
CHEN Hong-shuai⁴

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
3. Shanghai Shen Yuan Geotechnical Engineering Co., Ltd., Shanghai 200040, China;
4. Shanghai No. 7 Construction Group Co., Ltd., Shanghai 200050, China

摘要

摘要: 短加筋土挡墙是一种在既有稳定墙体/陡坡前修建的短加筋土挡墙,但目前缺乏对短加筋土挡墙与稳定墙体/陡坡间连接形式及其作用的统一认识,对其工作机理的研究也有待深入。利用离心模型试验,结合系统的监测数据,对不同连接形式的模型墙顶沉降、墙面水平位移、土压力分布等规律进行了分析,探讨了短加筋土挡墙的行为特征以及墙后机械连接的作用。研究发现：短加筋土挡墙的竖向沉降和水平位移均较常规加筋土挡墙大且分布不均匀,墙后连接形式对短加筋土挡墙的变形存在明显的影响;短加筋土挡墙和其后稳定墙体/陡坡之间的压力远小于理论水平土压力值,稳定墙体/陡坡与短加筋土挡墙之间仅存在接触压力;短加筋土挡墙墙后设置机械连接可以显著提高整体稳定性,减小差异沉降,控制水平变形,而不设连接时短加筋土挡墙变形较大且易于垮塌破坏。
- 土工合成材料 /
- 短加筋土挡墙 /
- 离心模型试验 /
- 行为特征 /
- 连接
Abstract: The shored mechanically stabilized earth (SMSE) wall system is a kind of narrow MSE walls designed and constructed next to the existing stable walls/slopes. However, the views regarding the effects of different connection forms on SMSE wall system are not unified. The performance and mechanism of SMSE walls still need further researches. Accordingly, by using the centrifugal model tests on SMSE walls, the measured data including settlement, lateral displacement of the facing and earth pressure on the SMSE walls are analyzed. The special performance characteristics of the SMSE walls are compared with those of the conventional MSE walls, and the effects of mechanical connections on the SMSE wall system are discussed. The results indicate that the SMSE walls suffer larger and uneven deformation both on crest settlement and on lateral displacement than the converntional MSE walls, and the connection form behind the SMSE walls has obvious influence on their deformation. The meassured lateral pressure of narrow reinforced soil mass against the stable wall/slope is far below the theoretical active earth pressure, showing that there is only the contact pressure between the stable wall/slope and the SMSE wall. And mechanically connecting the SMSE wall to the stable wall/slope is an efficient measure to help control the deformation and improve the system stability, while the unconnected wall will suffer larger displacement and is prone to collapse.
- geosynthetics /
- shored mechanically stabilized earth wall /
- centrifuge model test /
- performance characteristic /
- connection

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参考文献(14)

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