中南大学学报（自然科学版）Issue(2)：450-458,9.DOI:10.11817/j.issn.1672-7207.2016.02.014
不同地应力下TBM盘形滚刀破岩特性
Mechanical characteristics of TBM disc cutter under the initial stress
摘要
Abstract
According to Mohr-Coulomb strength standard, the relationship between strength of rock and initial stress was analyzed and the rock-craking load model of disc cutter in the environment of initial stress was revised. Based on the excavating condition of TBM in Jinping secondary hydropower station, the rock-breaking simulation modelunder initial stress or not was established and the rock-breaking experiment without initial stress was carried out to study the load characteristic of disc cutter and the rock-breaking characteristic. The results show that the three-dimensional force increases with the increase of the initial stress; at a certain penetration depth, when the initial stress is 28−36 MPa, the vertical force and rolling force increase by a bigger margin with a rate of more than 70%, and the lateral force increases by the smallest margin compared with that of 0 MPa. With the increasement of initial stress, the total quantity of cracked rock decreases, and the energy consumed in breaking rock increases. The theoretical value and the simulation value of the three-dimensional force can fit well and the relative error of three-dimensional force ranges from 10% to 21%. The rock-craking load model and the simulation results can be verifiedto some extent by the rock-breaking experiment without initial stress.关键词
地应力/盘形滚刀/力学模型/贯入度/三向力载荷Key words
initial stress/disc cutter/mechanical model/penetration depth/three-dimensional force load分类
交通工程引用本文复制引用
夏毅敏,吴才章,顾健健,丛国强,唐露,张魁..不同地应力下TBM盘形滚刀破岩特性[J].中南大学学报（自然科学版）,2016,(2):450-458,9.基金项目
国家重点基础研究发展计划(“973”计划)项目(2013CB035401)；国家高技术研究发展计划(“863”计划)项目(2012AA041801)；国家自然科学基金资助项目(51274252)；湖南省科技计划项目(2013GK3003)(Project (2013CB035401) supported by the National Basic Research Program of China （“973”计划）
Project (2012AA041801) supported by the National High Technology Research and Development Program of China （2012AA041801）
Project (51274252) supported by the National Natural Science Foundation of China （51274252）
Project (2013GK3003) supported by the Technology Support Plan of Hunan Province) （2013GK3003）
