带加强肋单向土工格栅的拉拔试验

›› 2012, Vol. 33 ›› Issue (1): 53-59.

带加强肋单向土工格栅的拉拔试验

蔡春^{1, 2}，张孟喜¹，赵岗飞¹，李洁¹，吴郦威¹

1. 上海大学土木工程系，上海 200072；2. 大华（集团）有限公司工程管理中心，上海 200442

收稿日期:2010-06-05 出版日期:2012-01-10 发布日期:2012-01-17
通讯作者: 张孟喜，男，1963年生，博士后，教授，博士生导师，主要从事新型土工加筋技术及环境岩土工程方面的研究工作。E-mail: mxzhang@shu.edu.cn E-mail:caichun2011@sina.com
作者简介:蔡春，男，1984年生，硕士，工程师，主要从事新型土工加筋技术及深基坑工程方面的研究工作
基金资助:
国家自然科学基金资助项目(No. 40972192)；上海市教育委员会科研创新重点项目(No.11ZZ88)

Pull-out test of uniaxial geogrid with strengthening ribs

CAI Chun^{1, 2}，ZHANG Meng-xi¹，ZHAO Gang-fei¹，LI Jie1，WU Li-wei¹

1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. Engineering Management Center, Dahua Group Co., Ltd., Shanghai 200442, China

Received:2010-06-05 Online:2012-01-10 Published:2012-01-17

摘要/Abstract

摘要： 在水平-垂直加筋体系研究的基础上，对单向土工格栅设置了加强肋，使其具备立体加筋效果。通过大量的拉拔试验，研究了带加强肋土工格栅加筋的筋-土界面特性。通过对汇总得到的36组拉拔试验数据进行分析，探讨了肋间距与肋厚对极限拉拔阻力的影响情况。试验结果表明：在相同法向应力作用下，带加强肋土工格栅的极限拉拔阻力明显高于普通土工格栅，其极限拉拔阻力随着加强肋肋厚的增加而显著增加，并随着加强肋肋距的增加而逐渐减小。在试验基础上，进一步分析了带加强肋土工格栅与砂土的相互作用机制，探讨了极限拉拔阻力的影响因素，建立了拉拔阻力理论公式，并将试验结果与理论值比较，二者基本吻合。

关键词: 立体加筋, 带加强肋土工格栅, 拉拔试验, 极限拉拔阻力

Abstract: A new reinforced materials as to strengthen the rib of conventional geogrid is proposed on the basis of horizontal-vertical reinforced soil, which has the effect of three-dimensional reinforcement. A series of pull-out tests of geogrid with strengthening ribs are performed to investigate the interface behavior between sand and strengthening rib geogrid inclusions in terms of different forms of reinforcements. 36 groups of pull-out test data are received by a large number of tests. The impacts of tooth height and tooth spacing of reinforcement on ultimate pull-out resistance are discussed. Test results show that the ultimate pull-out force of strengthening rib geogrid significantly larger than ordinary ones in the same normal stress. Ultimate pull-out resistance increased as the increase of the height of strengthening rib; while it decreased when increased the rib spacing under the same degree of rib height. From the test results, the coefficient of apparent pull-out friction is evaluated. The interaction mechanism between soil and geogrid with strengthening ribs is further analyzed. The influencing factors of ultimate pull-out resistance are discussed; and a new theoretical formula is proposed to determine the pull-out resistance. The comparison between theoretical values and experimental results is in good agreement.

Key words: three-dimensional reinforcement, geogrid with strengthening ribs, pull-out test, ultimate pull-out resistance

中图分类号:

O 319.56

蔡春，张孟喜，赵岗飞，李洁，吴郦威. 带加强肋单向土工格栅的拉拔试验[J]. , 2012, 33(1): 53-59.

CAI Chun ，ZHANG Meng-xi ，ZHAO Gang-fei ，LI Jie1，WU Li-wei. Pull-out test of uniaxial geogrid with strengthening ribs[J]. , 2012, 33(1): 53-59.

参考文献

相关文章 15

[1]	金青, 王艺霖, 崔新壮, 王成军 , 张珂, 刘正银, . 拉拔作用下土工合成材料在风化料-废弃轮胎橡胶颗粒轻质土中的变形行为研究[J]. 岩土力学, 2020, 41(2): 408-418.
[2]	高俊丽, 徐宏飞, 曹威, 袁川. 加肋土工膜与砂土拉拔试验及界面细观分析[J]. 岩土力学, 2019, 40(12): 4668-4674.
[3]	冯君, 王洋, 张俞峰, 黄林, 何长江, 吴红刚, . 玄武岩纤维与钢筋锚杆锚固性能现场对比试验研究[J]. 岩土力学, 2019, 40(11): 4185-4193.
[4]	赵象卓，张宏伟，CAO Chen，张明，张怀东，韩军, . 不同围岩条件下锚杆肋间距与锚固力优化研究[J]. , 2018, 39(4): 1263-1270.
[5]	郑俊杰，曹文昭，周燕君，江金国. 三向土工格栅筋-土界面特性拉拔试验研究[J]. , 2017, 38(2): 317-324.
[6]	毕冬宾，尤志嘉，刘群，王程程，时健. 土层锚固体复合界面单元形式及力学效应研究[J]. , 2017, 38(1): 277-283.
[7]	张向东，王帅，赵阳豪，孙小彬，. 基于端锚黏结式锚杆静、动载试验的非均匀受力锚杆单元[J]. , 2016, 37(1): 269-278.
[8]	蔡剑韬. 土工格栅加筋膨胀土拉拔试验研究[J]. , 2015, 36(S1): 204-208.
[9]	苗晨曦，郑俊杰，崔明娟，谢明星，赵建斌，. 三向土工格栅筋土界面及摩擦特性的离散元模拟[J]. , 2014, 35(S1): 423-430.
[10]	苗晨曦，郑俊杰，崔明娟，谢明星，赵建斌,. 节点突起影响格栅加筋性能的离散元研究[J]. , 2014, 35(4): 1181-1186.
[11]	林永亮，张波，张孟喜，赵岗飞 . 网格状带齿加筋体界面特性的宏细观力学机制研究[J]. , 2013, 34(10): 2863-2868.
[12]	蔡春，张孟喜　. 带加强肋土工格栅的极限拉拔阻力分析[J]. , 2011, 32(S2): 340-345.
[13]	陈建峰，李辉利，柳军修，周健. 1000－7598 (2011)增刊1－0066－06[J]. , 2011, 32(S1): 66-71.
[14]	张达德，张家豪. 砂土围压下的废轮胎拉拔试验评估[J]. , 2011, 32(3): 733-737.
[15]	徐超，廖星樾. 土工格栅与砂土相互作用机制的拉拔试验研究[J]. , 2011, 32(2): 423-428.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed