深埋硬岩特长隧道快速掘进技术研究

李自强; 于丽; 王明年; 代仲宇

doi:10.3973/j.issn.1672-741X.2015.03.007

隧道建设 >

2015 , Vol. 35 >Issue 3: 232 - 237

DOI: https://doi.org/10.3973/j.issn.1672-741X.2015.03.007

研究与探索

深埋硬岩特长隧道快速掘进技术研究

李自强 ,
于丽 ,
王明年 ,
代仲宇

展开

（西南交通大学土木学院，四川成都 610031）

李自强(1987—)，男，重庆人，西南交大土木工程学院在读博士，主要研究方向为桥梁及地下工程。

收稿日期: 2014-09-22

修回日期: 2014-12-20

网络出版日期: 2015-03-20

收起

Study on Rapid Excavation Technology for Deep Superlong Tunnels in Hard Rock

LI Ziqiang ,
YU Li ,
WANG Mingnian ,
DAI Zhongyu

Expand

(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Received date: 2014-09-22

Revised date: 2014-12-20

Online published: 2015-03-20

Fold

摘要

对于深埋硬岩隧道，快速掘进技术的运用能够有效缩短工期，从而带来极高的经济效益。选择合理的爆破进尺以减少对围岩的损害是保证快速掘进的前提，同时配合高效的施工方式才能实现快速掘进。采用数值模拟方式，以虹梯关隧道为例，通过松动圈厚度及变形量大小对3，35，4，5 m各爆破进尺下围岩的稳定性进行评价，得出快速掘进的理论爆破进尺并应用于工程实际。在理论研究的基础上结合现场施工组织提出深埋硬岩隧道的快速掘进的合理进尺，即Ⅱ级围岩可采用35~4 m爆破进尺。

关键词： 深埋硬岩特长隧道; 快速掘进; 爆破施工; 合理进尺; 数值模拟

本文引用格式

李自强 , 于丽 , 王明年 , 代仲宇 . 深埋硬岩特长隧道快速掘进技术研究[J]. 隧道建设, 2015 , 35(3) : 232 -237 . DOI: 10.3973/j.issn.1672-741X.2015.03.007

Abstract

The application of rapid excavation technology in the construction of deep superlong hard rock tunnels can achieve shorter construction period and thus can result in good economic efficiency. Selecting proper blasting cyclic length, which can minimize the damage to the surrounding rock, is a prerequisite for rapid excavation. In the paper, the broken zone thickness and the deformation of the surrounding rock of Hongtiguan tunnel under 3, 35, 4, 5 m blasting cyclic lengths is evaluated by means of numerical simulation. Theoretical blasting cyclic length is obtained and applied in the tunneling. Finally, rational blasting cyclic length, i.e., 35~4 m in Grade Ⅱ surrounding rock, is proposed on basis of theoretical study and engineering practice.

Key words： deep superlong hard rock tunnel; rapid excavation; blasting; appropriate cyclic length; numerical simulation

Options

文章导航

〈

〉

模态框（Modal）标题

摘要

本文引用格式

Abstract