黏土中隧道开挖引起的地表及地表以下土体长期 沉降计算方法

杨 敏; 黄 炬; 孙 庆; 刘 侃; 曾英俊

黏土中隧道开挖引起的地表及地表以下土体长期沉降计算方法 English Version

杨敏^1,2,
黄炬^1,2,
孙庆^1,3,
刘侃^1,2,
曾英俊^1,4

1. 同济大学岩土及地下工程教育部重点实验室，上海 200092; 2. 同济大学地下建筑与工程系，上海 200092; 3. 中国建筑第三工程局有限公司技术中心，湖北武汉 430070; 4. 上海市第二市政工程有限公司，上海 200065

详细信息

作者简介:
杨敏 (1960 – ) ，男，江西南昌人，博士，教授，博士生导师，主要从事岩土工程方面的研究与教学工作。

中图分类号: TU434
计量
- 文章访问数: 01424
- HTML全文浏览量: 0
- PDF下载量: 0715
出版历程
- 收稿日期: 2011-01-10
- 发布日期: 2012-02-19

Computation method for long-term surface and subsurface settlements induced by excavation of tunnels in clays

YANG Min^1,2,
HUANG Ju^1,2,
SUN Qing^1,3,
LIU Kan^1,2,
ZENG Ying-jun^1,4

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Technical Center, China Construction Third Engineering Division, Co., Ltd., Wuhan 430070, China; 4. Shanghai No. 2 Municipal Engineering Co., Ltd., Shanghai 200065, China

摘要

摘要: 基于 Mair 提出的隧道开挖引起的土体瞬时沉降的理论以及进行的有限元数值模拟结果，推出地表及地表以下不同深度土体长期沉降的计算方法。首先模拟了 Ong 的离心机试验以验证数值模型的合理性，然后对隧道开挖引起的不同深度处土体长期沉降问题进行了模拟研究，建立了长期和瞬时情况下地层损失率之间的关系，并推导出长期情况下各深度处沉降槽宽度系数和最大沉降值的计算式，从而可确定沉降槽的形状。经与现场实测资料和数值模拟结果对比，验证了方法的合理性，可作为实际工程的借鉴。
- 隧道 /
- 地表以下 /
- 长期沉降
Abstract: Based on the Mair's theory of immediate settlement of soil due to tunneling, and the results of finite element simulation, a computation method for the long-term settlement of the soil at surface and subsurface is proposed. Ong’s centrifuge test is simulated first to verify the validity of the finite element model, then a numerical study on the long-term settlement of the soil at different depths is carried out. The relationship between ground losses under immediate and long-term conditions is established. Formulas for width parameter and the maximum settlement of settlement trough at different depths are also given, and the profile of settlement trough can be determined. Compared with the field measurement and numerical simulation, the validity of the proposed method is demonstrated. It can be employed in practical projects.
- tunnel /
- subsurface /
- long-term settlement

HTML全文

参考文献(9)

[1]	MAIR R J, TAYLOR R N, BRACEGIRDLE A. Subsurface settlement profiles above tunnels in clay[J]. Geotechnique, 1993, 43 (2): 315 – 320.
[2]	LOGANATHAN N, POULOS H G. Analytical prediction for tunneling-induced ground movements in clays[J]. Journal of Geotechnical and Geoenviromental Engineering, 1998, 124 (9): 846 – 856.
[3]	PECK R B. Deep excavations and tunneling in soft ground[C]// Proc 7th International Conference Soil Mechanics and Foundation Engineering. Mexico City, 1969: 225 – 290.
[4]	ONG C W. Centrifuge model study of tunnel-soil-pile interaction in soft clay[D]. Singapore: National University of Singapore, 2009.
[5]	SCHANZ T, VERMEER P A, BONNIER P G. The hardening soil model: formulation and verification[C]// Beyond 2000 in Computational Geotechnics. Amsterdam, 1999: 281-296.
[6]	张冬梅 . 软黏土的时效分析及隧道长期沉降的预测 [D]. 上海 : 同济大学 , 2003. (ZHANG Dong-mei. Analysis of time-dependent behavior of soft clay and its application on the prediction of long-term settlements of tunnels[D]. Shanghai: Tongji University, 2003. (in Chinese))
[7]	魏纲 . 盾构施工引起地面长期沉降的理论计算研究 [J]. 岩石力学与工程学报 , 2008, 27 ( 增刊 1): 2960 – 2966. (WEI Gang. Research on theoretical calculation of long-term ground settlement caused by shield tunneling[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27 (S1): 2960 – 2966. (in Chinese))
[8]	O’REILLY M P, MAIR R J, ALDERMAN G H. Long-term settlements over tunnels: an eleven-year study at Grimsby[C]// Proceedings of Conference Tunneling. London, 1991: 55 – 64.
[9]	张晨明 . 上海地区盾构施工期及工后土体固结反应特性研究 [D]. 上海 : 同济大学 , 2005. (ZHANG Chen-ming. Immediate and long-term behavior of Shanghai clay due to shield tunneling[D]. Shanghai: Tongji University, 2005. (in Chinese))