TBM水平支撑不同接触面积下的围岩稳定性分析  

Stability analysis of surrounding rock of TBM gripper with different contact areas

作　　者：孙伟[1] 凌静秀[1] 霍军周[1] 邓立营[2] 巫思荣[2] 党军锋[2] 

机构地区：[1]大连理工大学机械工程学院,辽宁大连030024 [2]北方重工集团有限公司,辽宁沈阳110141

出　　处：《哈尔滨工程大学学报》2013年第7期899-906,共8页Journal of Harbin Engineering University

基　　金：国家青年自然科学基金资助项目(51005033);国家973计划资助项目(2013CB035400);辽宁省科技攻关资助项目(2011220031);中央高校基本科研业务费专项资金资助项目(DUT13LK14)

摘　　要：针对全断面岩石掘进水平支撑在不稳定地质条件下,易出现支撑不稳、刀盘下沉等问题,基于ANSYS/LS-DYNA有限元仿真平台,以II类和V类围岩为研究对象,建立支撑靴在脉动载荷作用下撑紧围岩的数值仿真模型.提取了围岩的等效应力、支撑反力变化规律及材料失效质量.研究结果表明:水平支撑基本能够适应II类围岩,而在V类围岩中容易出现失稳,随着接触面积的下降,支撑力出现具有明显的阶跃性质,失稳时刻也逐渐提前,反映出水平支撑对软弱围岩的不适应,为支撑靴的结构设计和地质适应性提供参考依据.In order to avoid the shortcomings of the TBM gripper, such as instability of rock supports and cutter head subsidence, while it works in the unstable geology conditions, based on the finite element simulation platform of ANSYS/LS-DYNA, the researchers constructed a numerical simulation model of interaction between a gripper and rock under the pulsating load using type II and V surrounding rocks as their research objects. Next, the equiva- lent stress, and support reaction change rule, as well as the mass failure of surrounding rock were obtained. The re- suits showed that the gripper was able to adapt to the type II surrounding rock, and appeared unstable in the sur- rounding rock of Class V. Furthermore, with the contact area declining, the support force showed obvious nature of the step period, and the instability moment was gradually ahead of time, which reflected the maladaptation to the soft surrounding rock. The research study provides evidence for the need to design the structure of gripper shoe and the geological adaptability of it.

关 键 词：全断面岩石掘进机 水平支撑 支撑靴 围岩 稳定性分析 接触面积 

分 类 号：TU473.2[建筑科学—结构工程]