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隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (S2): 232-238.DOI: 10.3973/j.issn.2096-4498.2018.S2.031

• 规划与设计 • 上一篇    下一篇

香丽高速虎跳峡地下立交隧道设计与施工方法研究

郭成刚1, 孙杰2, 杨远怀3, 余隆3, 陈维2, 陈兴培4, 吴永红3, 5, *   

  1. (1. 中铁十七局集团第二工程有限公司, 陕西 西安 710043; 2. 云南建设投资控股集团有限公司, 云南 昆明 650501; 3. 昆明理工大学建筑工程学院, 云南 昆明 650504; 4. 云南省交通规划设计研究院, 云南 昆明 650041; 5. 云南博航交通科技有限公司, 云南 昆明 650000)
  • 收稿日期:2018-05-14 修回日期:2018-09-13 出版日期:2018-12-30 发布日期:2019-01-30
  • 作者简介:郭成刚(1982—),男,内蒙古呼和浩特人,2005年毕业于内蒙古工业大学,土木工程专业,本科,高级工程师,主要从事铁路和公路施工和研究工作。Email: 51306737@qq.com。*通信作者: 吴永红, Email: 496567227@qq.com。
  • 基金资助:

    国家自然科学基金资助项目(51669009,50878152)

Research on Design and Construction Method of Underground Interchange  Tunnel in Hutiaoxia of Shangrila to Lijiang Highway

GUO Chenggang1, SUN Jie2, YANG Yuanhuai3 , YU Long3, CHEN Wei2,  CHEN Xingpei4, WU Yonghong3, 5, *   

  1. (1. China Railway 17 Bureau Group No.2 Engineering Co., Ltd., Xi′an 710043, Shaanxi, China; 2. Yunnan Construction and Investment Holding Group Co., Ltd., Kunming 650501, Yunnan, China;3. School of Building Engineering, Kunming University of Science and Technology, Kunming 650504, Yunnan, China; 4. Yunnan Transportation Planning and Design Institute, Kunming 650041, Yunnan, China; 5. Yunnan Bohang Transportation Technology Co., Ltd., Kunming 650000, Yunnan, China)
  • Received:2018-05-14 Revised:2018-09-13 Online:2018-12-30 Published:2019-01-30

摘要:

香丽高速虎跳峡地下立交工程是香丽高速公路关键控制工程之一,为国内目前断面最大的山区地下立交隧道。该工程的超大断面隧道中间外凸处最大开挖跨度达28.96 m,拱顶呈扁平状,施工时易引起围岩松弛失稳、坍塌; 有无中墙连拱隧道结构复杂、受偏压影响较大,施工时易引起初期支护开裂。为满足快速施工及安全要求,对施工方法进行研究。将连拱隧道先行洞中侧拱脚设计成扩大式拱脚,2层支护结构改为3层。针对超大断面隧道围岩加强支护,注浆后采用二台阶预留核心土法开挖,相比最初采用的双侧壁导坑法,开挖效率提高近3倍,大幅提高施工速度。通过对监测数据进行分析,表明该施工方法有效可行,能够达到施工目的及要求。

关键词: 地下立交, 立交隧道, 设计, 施工方法

Abstract:

Hutiaoxia underground interchange project of Xiangli expressway is one of the key control projects of Shangrila to Lijiang highway. It is the mountain underground interchange tunnel with the largest cross section in China at present. The maximum excavation span in the convex part of the superlarge crosssection tunnel of the project is 28.96 m, and the dome is flat, which easily causes the surrounding rock to relax, lose stability and collapse during construction. In order to meet the requirements of rapid construction and safety, the construction methods are studied. The side arch foot of the leading tunnel of the multiarch tunnel is designed as an enlarged arch foot, and the twolayer support structure is changed into three layers. To strengthen the support of the surrounding rock of the superlarge crosssection tunnel, the twostep core retaining soil method is adopted to excavate after grouting. Compared with the original doubleside wall pit guiding method, the excavation efficiency is improved nearly three times. The analysis of monitoring data shows that this method is effective, and the purpose and requirements of the construction are achieved.

Key words: underground interchange, interchange tunnel, design, construction method

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