复杂地层超大断面隧道施工围岩力学特征模型试验

doi:10.16285/j.rsm.2017.1683

›› 2018, Vol. 39 ›› Issue (9): 3495-3504.doi: 10.16285/j.rsm.2017.1683

• 测试技术 • 上一篇

复杂地层超大断面隧道施工围岩力学特征模型试验

刘聪¹，李术才¹，周宗青^{1, 2, 3}，李利平¹，王康¹，侯福金^{1, 4}，秦承帅¹，高成路¹

1. 山东大学岩土与结构工程研究中心，山东济南 250061；2. 中国矿业大学深部岩土力学与地下工程国家重点实验室，江苏徐州 221116； 3. 河海大学水文水资源与水利工程科学国家重点实验室，江苏南京 210098；4. 山东高速集团有限公司建设管理公司山东济南 250101

收稿日期:2017-08-14 出版日期:2018-09-11 发布日期:2018-10-08
通讯作者: 周宗青，男，1988年生，博士，助理研究员，主要从事隧道与地下工程重大地质灾害致灾机理与防控方面的研究工作。E-mail: Zongqing.Zhou@sdu.edu.cn E-mail:liucong0215@163.com
作者简介:刘聪，男，1990年生，博士研究生，主要从事隧道工程地质灾害灾变机制与数值模拟方面的研究工作。
基金资助:
国家自然科学基金项目（No. 51679131, No. 51709159）；中国博士后科学基金资助项目（No. 2017T100492）；中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目（No. SKLGDUE K1702）；水文水资源与水利工程科学国家重点实验室开放研究基金（No. 2016491211）。

Model test on mechanical characteristics of surrounding rock during construction process of super-large section tunnel in complex strata

LIU Cong¹, LI Shu-cai¹, ZHOU Zong-qing^{1, 2, 3}, LI Li-ping¹, WANG Kang¹, HOU Fu-jin^{1, 4}, QIN Cheng-shuai¹, GAO Cheng-lu¹

1. Geotechnical and Structural Engineering Research Center，Shandong University, Jinan, Shandong 250061, China; 2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; 3. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 4. Shandong Hi-speed Construction Management Co., Ltd., Jinan, Shandong 250101, China

Received:2017-08-14 Online:2018-09-11 Published:2018-10-08
Supported by:
This work was supported by the National Natural Science Foundation of China(51679131, 51709159), the Postdoctoral Science Foundation of China(2017T100492), the State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (SKLGDUE K1702) and the Open Foundation of State Key Laboratory of Hydro-Water Resources and Hydraulic Engineering(2016491211).

摘要/Abstract

摘要： 以京沪高速济南连接线港沟隧道穿越断裂破碎带区域为依托工程，研究了复杂地层超大断面隧道施工情况下围岩力学响应特征。研发了大型可拼装式地质力学模型试验系统，搭建了以静态数据采集为基础的应力–应变场监测系统和以光栅测距为基础的位移场监测系统，开展了复杂地层超大断面隧道施工过程力学模型试验研究。通过对试验开挖过程中位移变形和围岩应力变化的实时监测，揭示了超大断面隧道穿越断裂破碎带施工过程的力学演化规律。监测数据表明：位移变形大致可分为“缓慢增加—急剧增大—稳定状态”3个过程，水平收敛位移要早于拱顶沉降进入急剧增大阶段；应力变化也可分为“应力积聚－应力释放－稳定状态”3个阶段。形成的试验方法技术以及结论对类似工程研究具有重要的指导和借鉴意义。

关键词: 隧道工程, 超大断面, 模型试验, 施工过程力学, 围岩特征

Abstract: Based on Ganggou tunnel of Jing-hu high-speed connection line road which crossed large fault zones, mechanical characteristics of surrounding rock were studied during the construction process of super-large section tunnels under complex strata. For this purpose, a large-scale three-dimensional assembled geomechanical model test system was designed and developed. The system included stress and strain field monitoring systems based on static data acquisition and a displacement field monitoring system based on raster ranging in order to monitor the mechanical response of surrounding rocks during tunnel excavating. Model tests on mechanics in construction process of super-large section tunnel under complex strata were conducted, and the data of displacement and stress were real-time monitored during testing through the pre-buried monitoring instruments at specific positions in the models. The results indicate that the displacement deformation of both horizontal and subsidence can be divided into three phases: slowly increasing phase, sharply increasing phase and steady state phase. The sharply increasing of horizontal displacement starts earlier than subsidence. Meanwhile, the three phases of stress accumulation, releasing and steady state of stress are also revealed. The research methods and results will guide similar engineering practices.

Key words: tunnel engineering, super-large section, model test, construction process mechanics, characteristic of surrounding rock

中图分类号:

U 457

刘聪，李术才，周宗青，李利平，王康，侯福金, 秦承帅，高成路,. 复杂地层超大断面隧道施工围岩力学特征模型试验[J]. , 2018, 39(9): 3495-3504.

LIU Cong, LI Shu-cai, ZHOU Zong-qing, LI Li-ping, WANG Kang,HOU Fu-jin, QIN Cheng-shuai, GAO Cheng-lu,. Model test on mechanical characteristics of surrounding rock during construction process of super-large section tunnel in complex strata[J]. , 2018, 39(9): 3495-3504.

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复杂地层超大断面隧道施工围岩力学特征模型试验

Model test on mechanical characteristics of surrounding rock during construction process of super-large section tunnel in complex strata

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