TBM施工超硬岩分类指标和确定方法研究

王玉杰; 曹瑞琅; 王胜乐; 刘志明

doi:10.3973/j.issn.2096-4498.2020.S2.005

隧道建设 >

2020 , Vol. 40 >Issue S2: 38 - 44

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.S2.005

研究与探索

TBM施工超硬岩分类指标和确定方法研究

王玉杰 ,
曹瑞琅 ,
王胜乐 ,
刘志明

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（1. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室，北京 100038；2. 西安理工大学，陕西西安 710048； 3. 水利部水利水电规划设计总院，北京 100120）

王玉杰（1974—），男，山西运城人，2001年毕业于香港理工大学，岩土工程专业，博士，教授级高级工程师，主要从事岩土力学与工程研究工作。E-mail: wangjy@iwhr.com。*通信作者：曹瑞琅， E-mail: caorl@iwhr.com。

网络出版日期: 2021-03-21

基金资助

国家重点研发计划项目（2016YFC0401801）；陕西省水利科技计划项目（2017slkj-27）

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Study on Classification Index and Determination Method of Extrahard Rock for TBM Tunnel

WANG Yujie ,
CAO Ruilang ,
WANG Shengle ,
LIU Zhiming

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(1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2. Xi′an University of Technology, Xi′an 710048, Shaanxi, China; 3. General Institute of Water Resources and Hydropower Planning and Design, Ministry of Water Resources, Beijing 100120, China)

Online published: 2021-03-21

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摘要

超硬岩分类指标和确定方法是TBM施工围岩分类需要关注的重要问题。完整岩体中隧洞施工，岩石坚硬程度和摩擦性是影响TBM掘进状态的主因。基于国内外TBM掘进预测模型和典型工程实测数据，重点分析岩石单轴抗压强度与TBM净掘进速度、现场贯入度指数的关系和敏感性，分析岩石摩擦性和TBM刀具磨损程度，讨论适用于划分超硬岩类别的阈值。综合分析岩石坚硬程度和摩擦性对TBM施工的影响，提出2类超硬岩划分标准：一类是单独由岩石坚硬程度决定的超硬岩（H₁），建议按单轴抗压强度UCS>200 MPa确定；另一类是由岩石坚硬程度和摩擦性共同决定的超硬岩（H₂），建议按单轴抗压强度UCS>150 MPa且摩擦性指数CAI>4.0确定。

关键词： 隧洞; TBM; 超硬岩; 围岩分类; 净掘进速度; 现场贯入指数; 岩石坚硬程度; 摩擦性

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王玉杰 , 曹瑞琅 , 王胜乐 , 刘志明 . TBM施工超硬岩分类指标和确定方法研究[J]. 隧道建设, 2020 , 40(S2) : 38 -44 . DOI: 10.3973/j.issn.2096-4498.2020.S2.005

Abstract

It is an important issue to determine extrahard rock classification index in surrounding rock classification of TBM tunnel. The rock hardness and friction characteristic are the main factors affecting the TBM state in the tunnel construction through intact rock mass. Based on the TBM prediction models and the measured data of typical engineering cases, the relationship and sensitivity between the uniaxial compressive strength of rock and the penetration rate and field penetration index are analyzed emphatically. The friction characteristic of rock and the attrition of TBM cutters are analyzed. The thresholds suitable for classifying extrahard rock are discussed. The impact of rock hardness and friction characteristic on the TBM construction is analyzed synthetically, and two types of extrahard rocks are proposed as follows. (1) Extrahard rockd etermined by hardness (H1) , whose UCS is higher than 200 MPa. 〖ＪＰ２〗(2) Extrahard rock determined by hardness and friction characteristic (H2), whose UCS is higher than 150 MPa and CAI is higher than 4.0.

Key words： tunnel; TBM; extrahard rock; rock classification; penetration rate; field penetration index; rock hardness; friction characteristic

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