Construction Method of Lajishan Tunnel Entrance

doi:10.3969 /j.issn.1674-0696.2013.04.23

Abstract

Abstract: The methods of tunnel entrance construction in the soft ground at home and abroad are introduced． Based on numerical analysis，the construction planning of Lajishan Tunnel entrance is studied and CＲD method is chosen as the construction method，and the construction process of Lajishan Tunnel is determined． The site displacement monitoring data show that: the displacement of crown settlement is no more than 9cm with the CＲD method construction，which ensures the safety of the construction process． Compared the monitored value with the calculated value，it is indicated the use of the CＲD method in construction is appropriate．

Key words: tunnel engineering, CＲD method, construction, arch-crown subsidence

摘要： 介绍了国内外软弱地层下隧道洞口段的施工方法，根据数值计算，研究了拉脊山隧道洞口段的施工方案，确定了施工方法———CＲD 法，及拉脊山隧道洞口段的施工工序。现场位移监测数据表明: 采用 CＲD 法施工时，拱顶沉降最大位移≯9 cm，保证了施工过程的安全。对比监测值与数值计算值，表明利用 CＲD 法进行施工是恰当的。

关键词: 隧道工程, CＲD 法, 施工, 拱顶下沉

CLC Number:

TU455

Yan Pengfei，Yao Kun. Construction Method of Lajishan Tunnel Entrance[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(4): 642-646.

闫鹏飞，姚坤. 拉脊山隧道洞口段施工方法研究[J]. 重庆交通大学学报（自然科学版）, 2013, 32(4): 642-646.

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