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隧道建设(中英文) ›› 2010, Vol. 30 ›› Issue (S1): 425-428.

• 施工技术 • 上一篇    下一篇

岩溶隧道施工中的拱桥跨越技术

杨丹1,李伟2   

  1. 1. 西南交通大学土木工程学院,成都610031;2. 中铁西南科学研究院有限公司,成都610031
  • 收稿日期:2010-03-28 修回日期:2010-07-08 出版日期:2010-08-14 发布日期:2010-08-25
  • 作者简介:杨丹(1983—),女,毕业于西南交通大学土木工程学院。硕士研究生,工程师,主要从事工程地质、地球物理探测、岩溶隧道施工等方面的研究。

Application of Arch Bridges in Tunneling in Karst Areas

 YANG  Dan1, LI  Wei2   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031;
    2. Southwest Scientific Research of CREC, Chengdu 610031
  • Received:2010-03-28 Revised:2010-07-08 Online:2010-08-14 Published:2010-08-25

摘要:

岩溶地区隧道施工呈现地质条件复杂、施工难度大、危险性高等特点,为了克服这些岩溶不良地质对隧道施工的影响,技术人员采用了多种处理措施。介绍拱桥跨越技术在岩溶隧道施工中的应用,通过对方案思路、设计要点和施工要点的论述,介绍了拱桥跨越技术处理复杂岩溶地质的技术方法。同时以长鹰坝二号隧道岩溶处理方法为例,介绍了综合采用回填和拱桥技术共同治理该岩溶的方法,为以后的岩溶隧道处理积累了一定的经验。通过分析认为拱桥跨越技术是处理岩溶地质的一种较好的方法,适合用于隧道穿过大型干溶洞,但是在实际应用中需要综合考虑岩溶特点、围岩条件、水文地质、周围环境、施工成本、施工风险以及结构安全等因素。

关键词: 隧道施工, 岩溶隧道, 干溶腔, 跨拱

Abstract:

Tunneling in karst area shows the situation of complex geological condition, great construction difficulty and high risk. In order to overcome the influence of karst on tunneling, many treatment measures are applied. The application of arch bridge in tunneling in karst areas is presented in respect of concept, design key points and construction key points. At the same time, the treatment of the karst in No.2 Changyingba tunnel is given in this paper. Back filling and arch bridge are used to treat the karst in this tunnel. This provides certain experiences for karst tunnel construction. Finally, the overall analysis shows that the arch bridge option, which is suitable for tunneling across large dry karst cavities, is a good karst treatment method. During the application of arch bridges, the karsts, surrounding rock mass, hydrology, surrounding environment, construction cost, construction risk and structural safety should be taken into account.

Key words: tunnel construction, karst tunnel, dry karst cavity, span arch