砂卵石地层下伏膨胀岩土盾构隧道结构内力特征

方勇; 何川; 齐春; 张明

doi:10.3969/j.issn.0258-2724.2014.03.003

砂卵石地层下伏膨胀岩土盾构隧道结构内力特征

doi: 10.3969/j.issn.0258-2724.2014.03.003

基金项目:

国家自然科学基金资助项目（51278422，U1134208）

国家科技支撑计划资助项目（2012BAG05B03）

国家973计划资助项目（2010CB732105）

四川省青年科技基金资助项目（2012JQ0021）

详细信息

通讯作者:
何川（1964-），男，教授，博士，长江学者，研究方向为公路、铁路及城市地铁隧道，E-mail：chuanhe21@163.com

计量
- 文章访问数: 901
- HTML全文浏览量: 56
- PDF下载量: 479
- 被引次数: 0
出版历程
- 收稿日期: 2013-05-09
- 刊出日期: 2014-06-25

Structural Internal Force of Shield Tunnel in Expansive Soil Underlying Sandy Pebble Layer

摘要

摘要: 成都地铁二号线区间盾构隧道局部穿过砂卵石下伏膨胀岩土地层，为获得下伏地层膨胀荷载对盾构隧道衬砌结构内力的影响规律，采用数值方法分析了下伏地层在不同范围发生局部膨胀时对衬砌结构外侧压力的影响.通过现场测试得到了盾尾注浆时和隧道贯通后衬砌结构荷载及内力的分布规律，并与不同膨胀荷载下结构内力的计算结果进行了比较.研究表明：膨胀圈厚度及范围对膨胀后压力增量的影响较小，膨胀力对压力增量的影响较大；局部膨胀荷载的存在将增大管片结构弯矩，对结构受力不利，负弯矩是下伏膨胀岩土地层盾构隧道结构设计的控制因素.计算砂卵石下伏膨胀岩土地层中盾构隧道结构内力时，应考虑膨胀荷载的影响，膨胀荷载可采用数值分析等手段确定.
- 盾构隧道 /
- 膨胀力 /
- 膨胀荷载 /
- 数值分析 /
- 现场测试
Abstract: The Chengdu metro line 2 partly passes through the complex strata of sandy pebble and expansive soil. In order to obtain the influence law of expansive force resulted from partial expansion on shield tunnel lining structure load in complex layers, the influence of partial expansion with various ranges and expansion forces on the contact pressure of tunnel lining structure was analyzed with a numerical method. Load distribution and internal forces of tunnel lining structure at the stage of grouting and after tunnel transfixion were obtained by field tests and compared with the calculated structural internal forces under different expansion loads. The research show that the expansion thickness and range have a little effect on the increment of pressure on the lining structure, but the expansion force has a great influence on the increment. The existence of partial expansion will increase the bending moment of segment and is harmful to the lining structure. The negative bending moment becomes the control factor of tunnel structure design in the complex layers. When structure internal forces in complex layers of sandy pebble and expansive soil are calculated, the influence of expansion load should be considered and it is better to use a numerical method to determine its value.
- shield tunnel /
- expansion force /
- expansion load /
- numerical analysis /
- field test

HTML全文

参考文献(15)

杨林果, 刘义虎, 黄向京. 膨胀土处治理论与工程建造新技术[M]. 北京:人民交通出版社, 2008: 12-32.

韩华强, 陈生水. 膨胀土的强度和变形特性研究[J]. 岩土工程学报, 2004, 26(3): 422-424. HAN Huaqiang, CHEN Shengshui. A study on strength and deformation of expansive soils[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(3): 422-424.

陈铁林, 米占宽, 陈生水. 膨胀土路基变形的数值模拟[J]. 岩土力学, 2005, 26(增刊1): 137-140. CHEN Tielin, MI Zhankuan, CHEN Shengshui. Numerical simulation of deformation of expansive soil roadbed[J]. Rock and Soil Mechanics, 2005, 26(Sup.1): 137-140.

HAWLADER B C, LO K Y, MOORE I D. Analysis of tunnels in shaly rock considering three-dimensional stress effects on swelling[J]. Cananian Geotechnical Journal. 2005, 42: 1-12.

任青阳, 朱以文, 王靖涛, 等. 膨胀土弹塑性本构关系数值建模方法研究[J]. 岩土力学, 2006, 27(10): 1699-1708. REN Qingyang, ZHU Yiwen, WANG Jingtao, et al. Numerical modeling the elastoplastic constitutive relation of expansive soil[J]. Rock and Soil Mechanics, 2006, 27(10): 1699-1708.

罗冲, 殷坤龙, 周春梅, 等. 膨胀土在不同约束状态下的试验研究[J]. 岩土力学, 2007, 28(3): 635-638. LUO Chong, YIN Kunlong, ZHOU Chunmei, et al. Testing study on expansive soil in different restrained conditions[J]. Rock and Soil Mechanics, 2007, 28(3): 635-638.

PÉREZ-ROMERO J, OTEO C S, de la FUENTE P. Design and optimization of the lining of a tunnel in the presence of expansive clay levels[J]. Tunnelling and Underground Space Technology, 2007, 22(1): 10-22

MARCO B. Numerical simulation of the swelling behaviour around tunnels based on special triaxial tests[J]. Tunnelling and Underground Space Tech-nology, 2008, 23(5): 508-521.

胡瑾, 王保田, 张文慧, 等. 无荷和有荷条件下膨胀土变形规律研究[J]. 岩土工程学报, 2011, 33(增刊): 335-338. HU Jin, WANG Baotian, ZHANG Wenhui et al. Deformation trends of expansive soils under free and loading condition[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(Sup.): 335-338.

MAO Dawei, NILSEN B, LU Ming. Analysis of loading effects on reinforced shotcrete ribs caused by weakness zone containing swelling clay[J]. Tunnelling and Underground Space Technology, 2011, 26(3): 472-480.

TANG S B, TANG C A. Numerical studies on tunnel floor heave in swelling ground under humid conditions[J]. International Journal of Rock Mechanics and Mining Sciences, 2012, 55: 139-150.

郭瑞, 何川, 方勇. 膨胀土地层中盾构隧道管片结构受力分析与对策研究[J]. 现代隧道技术, 2010, 47(6): 17-22. GUO Rui, HE Chuan, FANG Yong. Analysis on mechanical behavior of shield tunnel segmental lining in swelling ground and countermeasures[J]. Modern Tunnelling Technology, 2010, 47(6): 17-22.

林刚, 罗世培, 郭俊, 等. 膨胀岩土地层盾构隧道结构力学行为研究[J]. 现代隧道技术, 2011, 48(3): 74-79. LIN Gang, LUO Shipei, GUO Jun, et al. Study on structural behavior of a shield tunnel in swelling rock and soil strata[J]. Modern Tunnelling Technology, 2011, 48(3): 74-79.

何川, 封坤. 大型水下盾构隧道结构研究现状与展望[J]. 西南交通大学学报, 2011, 42(1): 1-9. HE Chuan, FENG Kun. Review and prospect of structure research of underwater shield tunnel with large cross-section[J]. Journal of Southwest Jiaotong University, 2011, 42(1): 1-9.

苏宗贤, 何川. 荷载-结构模式的壳-弹簧-接触模型[J]. 西南交通大学学报, 2007, 42(3): 288-292. SU Zongxian, HE Chuan. Shell-spring-contact model for load and structure interaction[J]. Journal of Southwest Jiaotong University, 2007, 42(3): 288-292.

施引文献

附加材料(0)

访问统计

点击查看大图

计量

文章访问数: 901
HTML全文浏览量: 56
PDF下载量: 479
被引次数: 0

砂卵石地层下伏膨胀岩土盾构隧道结构内力特征

doi: 10.3969/j.issn.0258-2724.2014.03.003

通讯作者: 何川（1964-），男，教授，博士，长江学者，研究方向为公路、铁路及城市地铁隧道，E-mail：chuanhe21@163.com

计量

出版历程

Structural Internal Force of Shield Tunnel in Expansive Soil Underlying Sandy Pebble Layer

计量

出版历程

目录

通讯作者:
何川（1964-），男，教授，博士，长江学者，研究方向为公路、铁路及城市地铁隧道，E-mail：chuanhe21@163.com