疏排桩–土钉墙基坑支护中土钉墙加固效果试验研究

杨敏; 古海东

疏排桩–土钉墙基坑支护中土钉墙加固效果试验研究 English Version

杨敏^1,2,
古海东^1,2

（1. 同济大学土木工程学院地下建筑与工程系，上海 200092；2. 同济大学岩土及地下工程教育部重点实验室，上海 200092）

详细信息

作者简介:
杨敏(1960– )，男，教授，博士生导师，工学博士，主要研究方向为深基坑及桩基工程。

中图分类号: TU473.2
计量
- 文章访问数: 1217
- HTML全文浏览量: 0
- PDF下载量: 609
出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Centrifuge tests on soil-nailing reinforcing effect in scattered row piles and soil nailing for excavations

YANG Min^1,2,
GU Hai-dong^1,2

(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)

摘要

摘要: 采用同济大学中型岩土离心机进行了5组疏排桩–土钉墙组合支护基坑的离心机模型试验。离心机模型试验结果表明：组合支护结构中土钉能够显著提高桩间土体稳定性。土钉长度对疏排桩–土钉墙组合支护基坑稳定性、破坏模式以及桩间土拱效应影响显著。在本文研究的土性和基坑条件下，当土钉长度和基坑高度之比（L/H）为0.33时，桩间土拱效应明显，桩间土体滑裂面形态与疏排桩支护结构形似，当L/H为0.67时，桩间土拱效应不明显，滑裂面形态与土钉墙支护结构相似。随着土钉长度的增加，疏排桩–土钉墙组合支护基坑中的排桩内力逐渐减小。
- 疏排桩 /
- 土钉墙 /
- 破坏模式 /
- 桩身内力 /
- 离心机模型试验
Abstract: A centrifuge study on pile-soil nailing (PSN) is carried out by Tongji University. The results of five groups of tests performed on the centrifuge in Tongji University show that the soil nailing of PSN can greatly increase the stability of cuttings. The length of soil nails has significant effects on the stability, failure mode and soil-arching effect of PSN. When the ratio of the nail length to the excavation depth (L/H) is 0.33, the soil-arching effect is very obvious, and the sliding surface morphology of PSN is similar to that of scattered pile retaining structure, However, when the L/H ratio is 0.67, the soil-arching effect is not obvious, and the sliding surface morphology of PSN is similar to that soil-nailing retaining structure. The pile internal forces of PSN decreases with the increase of the length of soil nails.
- scattered pile /
- soil-nailing wall /
- failure mode /
- pile internal force /
- centrifugal model test

HTML全文

参考文献(8)

[1]	杨敏, 刘斌. 疏排桩–土钉墙组合支护结构工作原理[J]. 建筑结构学报, 2011, 32(2): 126–133. (YANG Min, LIU Bin. Retaining characteristics of composite structure with scattered piles and soil nailing[J]. Journal of Building Structure, 2011, 32(2): 126–133. (in Chinese))
[2]	刘斌, 杨敏, 杨志银, 等. 疏排桩–土钉墙组合基坑支护结构设计与实践[J]. 土木工程学报, 2010, 43(10): 106–114. (LIU Bin, YANG Min, YANG Zhi-yin, et al. Design and practice of composite structure with scattered row piles and soil nailing for pit-protection[J]. China Civil Engineering Journal, 2010, 43(10): 106–114. (in Chinese))
[3]	TERAMOTO K, TAGA N, NARUSE T, et al. Model loading tests of reinforced slope with steel bars[C]// International Conference on Earth Reinforcement Practice. Fukuoka, 1992: 561–566.
[4]	FRYDMAN S, BAKER R, LEVY A. Modeling the soil nailing-excavation process[C]// Proceedings of International Conference Centrifuge 94. Singapore, 1994: 669–674.
[5]	TEI Kouji. A study of soil nailing in sand[D]. Oxiford University, 1993.
[6]	安关峰. 深基坑疏桩支护应用分析[J]. 岩石力学与工程学报, 2004, 23(6): 1044–1048. (AN Guan-feng. Application and analysis of sparse pile support for deep foundation[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(6): 1044–1048. (in Chinese))
[7]	周德培, 肖世国, 夏雄. 边坡工程中抗滑桩合理桩间距的探讨[J]. 岩土工程学报, 2004, 26(1): 132–135. (ZHOU De-pei, XIAO Shi-guo, XIA Xiong. Discussion on rational spacing between adjacent anti-slide piles in some cutting slope projects[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(1): 132–135. (in Chinese))
[8]	金钢锋, 屠毓敏, 阮长青. 土钉基坑支护中疏排桩抗滑效应研究[J]. 岩土力学, 2005, 26(4): 577–579. (JIN Gang-feng, TU Yu-min, RUAN Chang-qing. Study on anti-sliding effect of the cattered row piles in soil nailing wall pit-protection[J]. Rock and Soil Mechanics, 2005, 26(4): 577–579. (in Chinese))