云临高速大亮山隧道高地应力软岩大变形处治关键技术

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隧道建设（中英文）

云临高速大亮山隧道高地应力软岩大变形处治关键技术

郑勇，郭平，王丽军，陈星宇，段晓彬，王安民

(1. 云南省交通规划设计研究院股份有限公司，云南昆明 650041，2. 湖南省水利发展投资有限公司，湖南长沙 410007，3. 云南交投集团云岭建设有限公司，云南昆明 650041)

发布日期:2023-11-07

Key Technologies for Treating High Ground Stress and Large Deformation of Soft Rock in Daliangshan Tunnel of#br# Yunlin Expressway#br#

ZHENG Yong, GUO Ping,WANG Lijun, CHEN Xingyu, DUAN Xiaobin, WANG Anmin#br#

(1. Yunnan Provincial Transportation Planning and Design Research Institute Co., Ltd, Kunming
650041, Yunnan，China；2. Hunan Provincial Water Conservancy Development Investment Co.,
Ltd., Changsha 410007, Hunan, China；3. Yunnan Jiaotou Group Yunling Construction Co., Ltd.,
Kunming 650041, Yunnan， China)

Published:2023-11-07

摘要/Abstract

摘要： 为解决高地应力软岩隧道建设过程中初期支护变形、仰拱隆起、二次衬砌压溃等问题，依托云临高
速大亮山隧道展开大变形处治关键技术研究。该隧道大变形段具有如下特点：1）初期支护变形累计变形量
大、变形速率高、持续时间长；2）仰拱隆起病害段落长、隆起高差大、受水影响大；3）二次衬砌开裂破
坏形态为压溃式破坏、破坏位置位于拱肩和拱顶、破坏时机为突发性破坏、破坏时间为滞后二次衬砌浇筑
数月等。通过对大亮山隧道软岩大变形段的地质条件、破坏特点、变形特征及补勘结论等方面综合分析，
采用理论分析、工程类比、数值模拟和现场实测等手段，提出仰拱曲率优化-初期支护双层钢架-二次衬砌
加强衬砌-洞周限位锚杆等措施的大变形处治设计方案后，开展试验段施工和研究。试验成果表明：1）试
验段累计施工323 m，平均月进尺约43 m/月；2）试验段支护方案较原设计方案，初期支护最大周边收敛
值由1.4 m减小至0.30 m，最大拱顶沉降值由0.80 m减小至0.52 m，日均变形量由 7 cm/d 减小至1～2 cm/d；
3）隧道大变形得到有效控制，初期支护无开裂、掉块，仰拱及二次衬砌未出现病害；4）结合监测数据及
现场情况，经分析总结试验段的综合支护体系方案较合理，大变形处治关键技术总体较成功。

关键词: 隧道工程, 高地应力, 软岩, 大变形, 支护体系

Abstract: In order to solve the problems of initial support deformation, inverted arch uplift,
secondary lining collapse and other problems during the construction of high ground stress soft
rock tunnel, the key technology research of large deformation control is carried out relying on
Daliangshan Tunnel of Yunlin Expressway. The large deformation section of the tunnel has a large
cumulative deformation amount, high deformation rate, and long duration of initial support
deformation. The inverted arch has a long disease section with large elevation difference and is
greatly affected by water; The deformation patterns and failure characteristics of the second lining
are as follows: crushing failure, failure location at the arch shoulder and arch crown, sudden
failure at the time, and delayed pouring of the second lining for several months. Through a
comprehensive analysis of the geological conditions, failure characteristics, deformation
characteristics, and supplementary survey conclusions of the soft rock large deformation section of
网络首发时间：2023-11-08 12:44:41
网络首发地址：https://link.cnki.net/urlid/44.1745.U.20231107.1430.003
the Daliangshan Tunnel, theoretical analysis, engineering analogy, numerical simulation, and
on-site measurement are used to propose a design plan for large deformation treatment, including
optimization of inverted arch curvature, initial support of double layer steel frame, secondary
lining reinforcement of lining, and limiting anchor bolts around the tunnel. After that, construction
and research on the experimental section are carried out. The experimental results show that: 1)
The cumulative construction of the experimental section is 323m, with an average monthly
footage of about 43m/month; 2) Co MPared with the original design, the support scheme for the
experimental section has reduced the maximum peripheral convergence value of the initial support
from 1.4m to 0.30m, the maximum arch settlement value from 0.80m to 0.52m, and the daily
average deformation amount from 7cm/d to 1-2cm/d; 3) The large deformation of the tunnel has
been effectively controlled, with no cracking or falling of the initial support, and no damage to the
inverted arch and secondary lining; 4) Based on monitoring data and on-site conditions, the
comprehensive support system scheme for the experimental section is analyzed and summarized
to be reasonable, and the key technologies for large deformation treatment are generally
successful.

Key words: Tunnel engineering, High geostress, Soft rock, Large deformation, Support system

郑勇, 郭平, 王丽军, 陈星宇, 段晓彬, 王安民. 云临高速大亮山隧道高地应力软岩大变形处治关键技术[J]. 隧道建设.

ZHENG Yong, GUO Ping, WANG Lijun, CHEN Xingyu, DUAN Xiaobin, WANG Anmin. Key Technologies for Treating High Ground Stress and Large Deformation of Soft Rock in Daliangshan Tunnel of#br# Yunlin Expressway#br#[J]. Tunnel Construction.

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云临高速大亮山隧道高地应力软岩大变形处治关键技术

Key Technologies for Treating High Ground Stress and Large Deformation of Soft Rock in Daliangshan Tunnel of#br# Yunlin Expressway#br#

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