安康膨胀土隧道的设计和施工

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摘要研究目的:针对安康地区强膨胀土在既有隧道施工及运营过程中对初期支护及衬砌结构产生较大的破坏作用，结合襄渝线增建第二线安康地区新七里沟强膨胀土隧道设计及施工的典型实例，通过数值模拟及现场测试分析，探索适宜强膨胀土隧道的设计及施工方法，解决膨胀土隧道施工过程中，初期支护变形开裂，二次衬砌裂损的难题，为铁路及公路隧道在强膨胀土隧道中施工提供理论及实践依据。

研究结论:(1)强膨胀土隧道在开挖过程中其膨胀压力常具有不对称性，开挖后土体早期变形较大，宜适当加大预留变形量并采用较大刚度的初期支护且及早封闭成环;(2)三台阶预留核心土的施工方法适用于强膨胀土隧道的施工，椭圆形钢筋混凝土衬砌结构合理能抵御较大膨胀压力，确保衬砌结构安全;(3)本研究成果可在安康及其他强膨胀土地区隧道设计及施工中推广应用。

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	张永平

关键词 ：强膨胀土, 设计, 施工

Abstract：Research purposes: Aiming at the strong expansive soil in Ankang area to cause the large damage to the initial support and tunnel lining during the construction and operation，and compared with the typical case of design and construction of expansive soil tunnel of the second railway line from Xiangfan to Chongqing in AnKang area, the numerical simulation and field test were done and the discussion was made on suitable the design and construction method for the strong expansive soil tunnel to solve the problems of the cracking and deformation of the initial support and the cracking damage to the tunnel lining during the construction of expansive soil tunnel and provide theoretical and practical basis for construction of the strong expansive soil tunnel of railway and highway.

Research conclusions:(1)During excavation of strong expansive soil tunnel，the expansive pressure is dissymmetrical to cause the large deformation in the early stage of tunnel excavation. Therefore，the allowable deformation volume should be increased properly，the initial support with higher stiffness should be used and closed into loop as soon as possible. ( 2)The construction method of three-bench and reservation of core soil is available for construction of strong expansive soil tunnel. If the structure of oval reinforced concrete tunnel lining is reasonable，it can withstand the larger expansive pressure to make the lining structure safe.(3)This research result can be applied widely in tunnel design and construction of the strong expansive soil tunnel in Ankang and other similar areas.

Key words： strong expansive soils design construction

收稿日期: 2013-02-20

PACS:

U457+.2

基金资助:国家自然科学基金项目(51177139);教育部科技项目(20100184110015);中央高校基本科研业务费专项资金项目(A0920502051202 - 38)

作者简介: 张永平，1974年出生，男，高级工程师

引用本文:

张永平. 安康膨胀土隧道的设计和施工[J]. 铁道工程学报, 2013, 30(10): 77-80.
ZHANG Yong-Pig. Design and Construction of Expansive Soil Tunnel in Ankang. 铁道工程学报, 2013, 30(10): 77-80.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2013/V30/I10/77

[1]TB 10038—2001，铁路工程特殊岩土勘察规程[S].

TB 10038—2001，Code for Special Geological Condition Investigation of Railway Engineering [S].

[2]TZ 204—2008，铁路隧道工程施工技术指南[S].

TZ 204—2008，Technical Guide for Construction of Railway Tunnel Engineering [S ].

[3]中铁二院工程集团有限责任公司、西南交通大学、中铁十二局集团有限公司.襄渝线膨胀土隧道结构设计与施工方法研究报告[R].中铁二院工程集团有限责任公司、西南交通大学、中铁十二局集团有限公司，2010.

China Railway ErYuan Egineering Group Co. Ltd , South West JaoTong University, The 2nd Engineering Co. of China Railway 12th Bureau Group. Study on the Design and Construction of Swelling Soil Tuuuel about XiangYu Railway.

[4]关宝树，赵勇.软弱围岩隧道施工技术[M].北京:人民交通出版社，2011.

Guan Baoshu, Zhao Yong. Construction Technology of Soft Rock Tunnel [M ].Beijing: China Communications Press , 2011.

[5]卿三惠，黄润秋.乌鞘岭特长隧道软弱围岩大变形特性研究[J].现代隧道技术，2005(2) :7-14.

Qing Sanhui, Huang Runqiu. Study on the Large Deformation Characteristics of the Soft Rocks in Wushaoling Tunnel [J] . Modern Tunnelling Technology, 2005(2):7-14.

[6]李伟平.公路隧道穿越软弱围岩的变形与控制方法[J]. 现代隧道技术，2009(2):44-49.

Li Weiping. Deformations and Their Control for Highway Tunnels Traversing Soft Surrounding Rocks [J].Modern Tunnelling Technology, 2009 (2):44-49.

[7]杨建民，喻渝，谭宗盛.大断面黄土隧道围岩压力试验研究[J].铁道工程学报，2009(2):76-79.

Yang Jianmin , Yu Yu , Tan Zongsheng. Experimental Research on the Surrounding Rock Pressure of Large Sectional Loess Tunnel under Deep and Shallow Submersion [J].Journal of Railway Engineering Society, 2009 (2 ):76-79.