|本期目录/Table of Contents|

[1]王伟,李忠,沈学军,等.软弱围岩隧道洞口浅埋段变形特征及控制措施研究*[J].中国安全生产科学技术,2020,16(9):103-109.[doi:10.11731/j.issn.1673-193x.2020.09.016]
　WANG Wei,LI Zhong,SHEN Xuejun,et al.Study on deformation characteristics and control measures of shallowburied section at portal of soft rock tunnel[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(9):103-109.[doi:10.11731/j.issn.1673-193x.2020.09.016]
点击复制

软弱围岩隧道洞口浅埋段变形特征及控制措施研究*
分享到：

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年9期
页码:
103-109
栏目:
职业安全卫生管理与技术
出版日期:
2020-09-30

文章信息/Info

Title:
Study on deformation characteristics and control measures of shallowburied section at portal of soft rock tunnel
文章编号:
1673-193X(2020)-09-0103-07
作者:
王伟; 李忠; 沈学军; 林玉刚; 李赤谋; 毛永强
（1.中交第二航务工程局有限公司，湖北 武汉 430040；
2.中交公路长大桥建设国家工程研究中心有限公司，北京 100088；
3.中交二航局第二工程有限公司，重庆 400000；
4.中交文山高速公路建设发展有限公司，云南 文山 663000）
Author(s):
WANG Wei;  LI Zhong;  SHEN Xuejun;  LIN Yugang;  LI Chimou;  MAO Yongqiang
(1.CCCC Second Harbour Engineering Co.,Ltd.,Wuhan Hubei 430040,China;
2.CCCC Highway Bridges National Engineering Research Centre Co.,Ltd.,Beijing 100088,China;
3.China Communications 2nd Navigational Bureau 2nd Engineering Co.,Ltd.,Chongqing 400000, China;
4.CCCC Wenshan Expressway Construction Development Co.,Ltd.,Wenshan Yunnan 663000,China)
关键词:
软弱围岩隧道; 洞口浅埋; 大变形特征; 分级控制管理; 控制措施
Keywords:
soft rock tunnel;  shallowburied at portal;  largedeformation characteristic;  hierarchical control management;  control measure
分类号:
X951；U455
DOI:
10.11731/j.issn.1673-193x.2020.09.016
文献标志码:
A
摘要:
为解决洞口浅埋段软弱围岩隧道大变形控制难、施工风险高的问题。依托在建隧道工程，对洞口浅埋段初支变形及破坏特征进行分析，提出适合该隧道的变形控制措施。结果表明：洞口浅埋段围岩松散破碎受开挖扰动和地表水影响显著，隧道破坏形式多样，围岩纵向变形不规律，随埋深增大，局部渗水严重段存在拱腰挤出现象；开挖初期围岩变形速率高，最高达到86.8 mm/d，累计变形量大，其中上、中台阶围岩变形量占比为80%~90%，变形主要分为“加速增长—缓慢增长—再次增长—趋于稳定”4个变化阶段，再增长阶段持续时间较短，约6~10 d。根据围岩预留变形量建立各施工阶段的变形控制基准及超限应对处置措施，并提出工法优化，通过数值模拟验证该优化工法有利于支护结构及时封闭，可控制前期围岩变形，保证施工安全和进度。
Abstract:
To solve the problems of difficult control on large deformation and high construction risk in the shallowburied section at the portal of soft surrounding rock tunnel,depending on the tunnel engineering under construction,the deformation and failure characteristics of the initial support in the shallowburied section were analyzed,and the deformation control measures being suitable for the tunnel were proposed.The results showed that the surrounding rock in the shallowburied section at the portal was loose and broken,which was significantly affected by the excavation disturbance and surface water.There were various failure form of the tunnel,and the longitudinal deformation of the surrounding rock was irregular,which increased with the buried depth,and there was an arch waist extrusion phenomenon in the section with serious local water seepage.The deformation rate of surrounding rock was generally large in the initial stage of excavation,with the maximum value of 86.8 mm/d,and the cumulative deformation amount was large.Among which,the deformation amount of the surrounding rock in the upper and middle steps accounted for 80%~90%.Moreover,the deformation was mainly divided into four change stages:accelerating growth,slow growth,growth again,and tending to stability,and the duration of growth again stage was short,as about 6~10 days.According to the reserved deformation amount of surrounding rock,the deformation control reference and overlimit treatment measures at each construction stage were established.Meanwhile,the optimization of the working methods was proposed.The numerical simulation was carried out to verify that the optimization method,which is conducive to the timely closure of the support structure,control the deformation of surrounding rock in the early stage,and ensure the construction safety and progress.

参考文献/References:

［1］孙铁军,王伟,罗明睿,等.不同衬砌结构缺陷对隧道结构整体安全性的影响［J］.建筑科学与工程学报,2017,34(3):82-90. SUN Tiejun,WANG Wei,LUO Mingrui,et al.Influences of different lining structure defects on overall safety of tunnel structure ［J］.Journal of Architecture and Civil Engineering,2017,34(3):82-90.
［2］王羽扬,刘勇,王沉,等.高应力大变形软岩巷道“三壳”围岩控制机理及应用［J］.中国安全生产科学技术,2019,15(7):100-106. WANG Yuyang,LIU Yong,WANG Chen,et al.Control mechanism and application of “three shell” surrounding rock in soft rock roadway with high stress and large deformation ［J］.Journal of Safety Science and Technology,2019,15 (7):100-106.
［3］何满朝,景海河,孙晓明.软岩工程力学［M］.北京:科学出版社,2002.
［4］汪波,王杰,吴德兴,等.让压支护体系在软岩大变形公路隧道中的应用研究［J］.铁道科学与工程学报,2016,13(10):1985-1993. WANG Bo,WANG Jie,WU Dexing,et al.Study on application of yielding supporting system for large-deformation in soft rock highway tunnel ［J］.Journal of Railway Science and Engineering,2016,13(10):1985-1993.
［5］戴永浩,陈卫忠,田洪铭,等.大梁隧道软岩大变形及其支护方案研究［J］.岩石力学与工程学报,2015,34(S2):4149-4156. DAI Yonghao,CHEN Weizhong,TIAN Hongming,et al.Study on large deformation and support scheme of soft rock in Daliang tunnel ［J］.Chinese Journal of Rock Mechanics and Engineering,2015,34(S2):4149-4156.
［6］张辉,李国盛,支光辉.松散煤岩体钻封注耦合注浆锚固机理与试验研究［J］.中国安全生产科学技术,2018,14(8):141-145. ZHANG Hui,LI Guosheng,ZHI Guanghui.Mechanism and experimental study of coupled grouting and anchoring for drilling,sealing and grouting of loose coal and rock mass［J］.Journal of Safety Science and Technology,2018,14(8):141-145.
［7］来弘鹏,杨万精,谢永利.软岩大变形偏压公路隧道变形与荷载作用特征［J］.中南大学学报(自然科学版),2014,45(6):1924-1931. LAI Hongpeng,YANG Wanjing,XIE Yongli.Analysis on deformation and load action features of large-deformation bias highway tunnel in soft rock ［J］.Journal of Central South University (Science and Technology),2014,45(6):1924-1931.
［8］杨建民,舒东利,张涵,等.软岩隧道初期支护沉降机理及其工程措施研究 ［J］.隧道建设,2018,38(4):545-550. YANG Jianmin,SHU Dongli,ZHANG Han,et al.Research on settlement mechanism of primary support of soft rock tunnel and its countermeasures ［J］.Tunnel Construction,2018,38 (4):545-550.
［9］郭健,阳军生,陈维,等.基于现场实测的炭质板岩隧道围岩大变形与衬砌受力特征研究［J］.岩石力学与工程学报,2019,38(4):832-841. GUO Jian,YANG Junsheng,CHEN Wei,et al.Research on large deformation of surrounding rock and mechanical characteristics of lining of carbonaceous slate tunnel based on field measurement ［J］.Chinese Journal of Rock Mechanics and Engineering,2019,38(4):832-841.
［10］赵志刚,吴忠仕,王伟,等.大断面浅埋黄土隧道大变形控制技术及效果分析［J］.科学技术与工程,2020,20(6):2470-2477. ZHAO Zhigang,WU Zhongshi,WANG Wei,et al.Large deformation control technology and effect of shallow-buried loess tunnel with large section ［J］.Science Technology and Engineering,2020,20(6):2470-2477.
［11］中华人民共和国通运输部.公路隧道施工技术规范：JTG/T 3660—2020 ［S］.北京:人民交通出版社,2020.
［12］LUO Y B,CHEN J X,CHEN Y,et al.Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method ［J］.Tunnelling and Underground Space Technology,2018,71:478-493.
［13］陈子全,何川,吴迪,等.高地应力层状软岩隧道大变形预测分级研究［J］.西南交通大学学报,2018,53(6):1237-1244. CHEN Ziquan,HE Chuan,WU Di,et al.Study of large deformation classification criterion for layered soft rock tunnels under high geostress［J］.Journal of Southwest Jiaotong University,2018,53(6):1237-1244.
［14］李权.软岩大变形公路隧道变形规律及控制技术研究［D］.成都:西南交通大学,2012.
［15］陈亮,陈寿根,杨家松.锦屏二级水电站引水隧洞软岩段变形特征及预留变形量分析［J］.水利水电技术,2013,44(10):52-61. CHEN Liang,CHEN Shougen,YANG Jiasong.Analysis on deformation characteristics and reserved deformation for soft rock section of diversion tunnel of Jinping II Hydropower Station ［J］.Water Resources and Hydropower Engineering,2013,44(10):52-61.
［16］王更峰.炭质板岩蠕变特性研究及其在隧道变形控制中的应用［D］.重庆:重庆大学,2012.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期： 2019-10-29
* 基金项目： 云南省交通运输厅科技创新示范项目(云交科教［2019］15号)
作者简介： 王伟，硕士，工程师，主要研究方向为岩土与隧道工程。
更新日期/Last Update: 2020-10-08