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隧道建设(中英文) ›› 2012, Vol. 32 ›› Issue (3): 315-322.DOI: 10.3973/j.issn.1672-741X.2012.03.009

• 研究与探索 • 上一篇    下一篇

不同偏压大断面浅埋隧道施工力学分析及优化

聂建春1,郑文博2,袁成海3   

  1. (1. 江西昌泰高速公路有限责任公司, 江西 吉安 343000; 2. 同济大学地下建筑与工程系, 上海 200092;3. 江西交通咨询公司, 南昌 330008 )
  • 收稿日期:2012-01-09 修回日期:2012-03-05 出版日期:2012-06-20 发布日期:2012-07-09
  • 作者简介:聂建春(1976—),男,江西南昌人,2000年毕业于武汉理工学院工业与民用建筑专业,大专,助理工程师,主要从事高速公路工程管理及研究工作。

Mechanical Analysis on and Optimization of Construction of  Asymmetricalloaded Large Crosssection Tunnels under Shallow Cover

NIE Jianchun1, ZHENG Wenbo2, YUAN Chenghai3   

  1. (1. Jiangxi Changtai Expressway Co., Ltd., Ji’an 343000, Jiangxi, China;  2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;  3. Jiangxi Transport Consultation Company, Nanchang 330008, China)
  • Received:2012-01-09 Revised:2012-03-05 Online:2012-06-20 Published:2012-07-09

摘要: 大断面隧道穿越地势起伏的地层环境时,地层偏压情况往往不同,在不同的偏压情况下选择合理的施工方法对控制大断面隧道施工力学性能具有重要意义。通过对双侧壁导坑法、改进台阶法、交叉中隔壁(CRD)法的数值模拟,分析不同偏压情况下的大断面浅埋隧道施工中的位移控制效果与支护承载情况。结果表明: 当地表倾角为0~10°时,宜采用改进台阶法;当地表倾角为10~20°时,优先选择改进台阶法,同时应加强支护并及时监测;当地表倾角为20~30°时,宜采用双侧壁导坑法。

关键词: 大断面隧道, 偏压浅埋, 双侧壁导坑法, 台阶法, CRD法, 改进的台阶法, 施工方法优化, 施工力学分析

Abstract: When large crosssection tunnels run through ground with uneven terrain, different asymmetrical earth pressures are always encountered. Therefore, selecting rational construction methods is very important for the control of the construction mechanical performance of asymmetricalloaded large crosssection tunnels under shallow cover. In the paper, analysis is made on the displacement control and support stress of asymmetricalloaded large crosssection tunnels under shallow cover, by means of numerical simulating on double side drift method, optimized bench method and CRD method. The results show that: 1) When the ground surface inclination angle ranges from 0° to 10°, optimized bench method should be adopted; 2) When the ground surface inclination angle ranges from 10° to 20°, optimized bench method should be adopted and the support should be strengthened and timely monitoring should be executed; 3) When the ground surface inclination angle ranges from 20° to 30°, double side drift method should be adopted.

Key words: large crosssection tunnel, asymmetrical load, shallow cover, double side drift method, bench method, CRD method, optimized bench method, construction method optimization, mechanical analysis