摘要
硬质岩层的盾构施工中,全断面硬岩隧道掘进机(tunnel boring machine,TBM)滚刀破岩效率的研究及工程实践广受关注,目前已有的研究成果不能很好地指导TBM掘进参数的设定以及有效提升破岩效率。为解决这一问题,在破岩效率评价标准的基础上,基于比能耗理论对TBM滚刀破岩效率预测模型展开研究。首先,分别推导得到非协同模式和协同模式下的破岩体积计算公式,并对2种模式下的破岩体积进行了计算和分析;其次,结合滚刀法向推力数学模型的推导结果,联立所得破岩体积及滚刀法向推力的相关公式,得到TBM滚刀破岩效率预测模型;最后,依托实际工程的应用及分析对本文所建立的破岩效率预测模型的合理性和实用性进行验证。研究结果表明:相比于其他情况,张拉破坏主导下的滚刀破岩效率更高;所建模型可以有效地应用于TBM掘进现场的破岩效率预测工作中。结合工程案例的有关计算和分析结果,给出了以控制比能耗为主要目标的滚刀贯入度的取值建议,为类似工程建设提供了有效的参考。
In the shield construction of hard rock stratum, the research and engineering practice of rock breaking efficiency of tunnel boring machine(TBM)hob are widely concerned. At present, the existing research results can not guide the setting of TBM tunneling parameters and effectively improve the rock breaking efficiency. To solve this problem, based on the rock breaking efficiency evaluation standard, this paper studies the rock breaking efficiency prediction model of TBM hob by using the specific energy consumption theory. Firstly, the calculation formulas of rock breaking volume under non-collaborative mode and collaborative mode are derived respectively, and the rock breaking volume under the two modes are calculated and analyzed. Secondly, based on the derivation results of the mathematical model of normal thrust of hob, the rock breaking efficiency prediction model of TBM hob is obtained by combining the relevant formulas of rock breaking volume and normal thrust of hob. Finally, the rationality and practicability of the rock breaking efficiency prediction model established in this paper are verified by the application and analysis of practical projects. The research results show that compared with other situations, the rock breaking efficiency of hob dominated by tensile failure is higher. The model established in this paper can be effectively applied to the prediction of rock breaking efficiency in TBM excavation site. Combined with the relevant calculation and analysis results of engineering cases, some suggestions on the value of hob penetration with the control of specific energy consumption as the main objective are given, which provides an effective reference for similar engineering constructions.
作者
乔世范
王超
刘红中
蒋泽龙
董常瑞
QIAO Shifan;WANG Chao;LIU Hongzhong;JIANG Zelong;DONG Changrui(School of Civil Engineering,Central South University,Changsha 410075,China;Track and Underground Engineering Design and Research Institute,China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2021年第12期1094-1102,共9页
Engineering Journal of Wuhan University
基金
中国铁路总公司科技研究开发计划重点课题项目(编号:2017G007-D,2017G008-J)
中国中铁股份有限公司科技研究开发计划项目(编号:2019-重点-20-01)。
关键词
硬质岩层
比能耗
破岩体积
滚刀法向推力
TBM滚刀破岩效率预测模型
贯入度
hard rock stratum
specific energy consumption
rock breaking volume
normal thrust of hob
rock breaking efficiency prediction model of TBM hob
penetration
