岩石温度对盘形滚刀破岩特性影响的研究
发布时间：2018-07-16 23:09
【摘要】：摘要：全断面硬岩隧道掘进机(TBM)是我国当前急需重点研究的重大技术装备,在铁路建设、西气东输、南水北调等隧道工程中得到了广泛的应用。TBM在大埋深、长距离硬岩掘进环境中会受到岩石温度的影响,导致岩石破碎机理发生变化,进而造成滚刀的损耗量大、破岩效率低、稳定性差等施工问题。基于上述背景,本文查阅大量国内外文献,深入分析研究岩石温度对盘形滚刀与岩石相互作用机理的影响规律,并研究了不同岩石温度下盘形滚刀结构参数以及掘进参数对破岩的影响规律,本文的主要研究内容如下： (1)以颗粒流理论为基础,建立了细观尺度上的热力学和岩石声发射模拟方法,并对利用cluster方法优化的岩石样本进行单轴压缩、巴西劈裂以及剪切实验等数值模拟实验,得到与宏观参数匹配的岩石样本,在合理简化实际工况的基础上,建立了盘形滚刀在不同岩石温度下的破岩颗粒流模型。 (2)利用建立的盘形滚刀破岩颗粒流模型,研究了岩石温度对滚刀破岩特性的影响规律以及不同岩石温度下滚刀结构参数和掘进参数对滚刀破岩的影响,从细观角度揭示了盘形滚刀在不同岩石温度下的破岩机制。 (3)通过直线式TBM滚刀破岩实验台,对不同岩石温度下滚刀的破岩过程进行深入研究,分析了不同岩石温度下滚刀的破岩特性以及载荷特性,结合数值仿真的数据结果,验证了数值模拟的有效性。
[Abstract]:Abstract: Full-section hard rock tunneling machine (TBM) is an important technical equipment which needs to be studied urgently in our country at present. TBM has been widely used in railway construction, gas transmission from west to east, water transfer from south to north and so on. Long distance hard rock driving environment will be affected by the rock temperature, resulting in rock fragmentation mechanism changes, resulting in hob loss, low rock breaking efficiency, poor stability and other construction problems. Based on the above background, this paper reviews a large number of domestic and foreign literature, and deeply analyzes the influence of rock temperature on the interaction mechanism between disc hob and rock. The influence of disk-shaped hob structure parameters and tunneling parameters on rock breakage under different rock temperatures is also studied. The main contents of this paper are as follows: (1) based on the particle flow theory, The thermodynamics and acoustic emission simulation methods of rock on mesoscale scale were established. The rock samples optimized by cluster method were simulated by uniaxial compression, Brazilian splitting and shear experiments. The samples matched with macroscopic parameters were obtained. On the basis of reasonably simplifying the actual working conditions, the rock breaking particle flow model of disc hob at different rock temperatures is established. (2) the established disk hob rock breaking particle flow model is used. The influence of rock temperature on rock breaking characteristics of hob and the influence of hob structure parameters and tunneling parameters on rock breaking are studied. The rock breaking mechanism of disc hob at different rock temperature is revealed from the viewpoint of meso. (3) the rock breaking process of hob at different rock temperature is deeply studied by means of straight line TBM hob rock breaking experiment bench. The characteristics of rock breaking and loading of hobs at different rock temperatures are analyzed. The validity of numerical simulation is verified by combining the data of numerical simulation.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.31
本文编号：2127977
[Abstract]:Abstract: Full-section hard rock tunneling machine (TBM) is an important technical equipment which needs to be studied urgently in our country at present. TBM has been widely used in railway construction, gas transmission from west to east, water transfer from south to north and so on. Long distance hard rock driving environment will be affected by the rock temperature, resulting in rock fragmentation mechanism changes, resulting in hob loss, low rock breaking efficiency, poor stability and other construction problems. Based on the above background, this paper reviews a large number of domestic and foreign literature, and deeply analyzes the influence of rock temperature on the interaction mechanism between disc hob and rock. The influence of disk-shaped hob structure parameters and tunneling parameters on rock breakage under different rock temperatures is also studied. The main contents of this paper are as follows: (1) based on the particle flow theory, The thermodynamics and acoustic emission simulation methods of rock on mesoscale scale were established. The rock samples optimized by cluster method were simulated by uniaxial compression, Brazilian splitting and shear experiments. The samples matched with macroscopic parameters were obtained. On the basis of reasonably simplifying the actual working conditions, the rock breaking particle flow model of disc hob at different rock temperatures is established. (2) the established disk hob rock breaking particle flow model is used. The influence of rock temperature on rock breaking characteristics of hob and the influence of hob structure parameters and tunneling parameters on rock breaking are studied. The rock breaking mechanism of disc hob at different rock temperature is revealed from the viewpoint of meso. (3) the rock breaking process of hob at different rock temperature is deeply studied by means of straight line TBM hob rock breaking experiment bench. The characteristics of rock breaking and loading of hobs at different rock temperatures are analyzed. The validity of numerical simulation is verified by combining the data of numerical simulation.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.31
【参考文献】
相关期刊论文 前10条
1 宋天田;周顺华;;复合地层条件下盾构刀盘设计研究[J];地下空间与工程学报;2007年03期
2 茅承觉,刘春林;掘进机盘形滚刀压痕试验分析[J];工程机械;1988年04期
3 左建平;谢和平;刘瑜杰;胡本;卢菁芳;;不同温度热处理后砂岩三点弯曲的断裂特性[J];固体力学学报;2010年02期
4 钱七虎;深部岩体工程响应的特征科学现象及“深部”的界定[J];东华理工学院学报;2004年01期
5 刘春;;中国高速铁路桥梁架设设备行业研究及展望[J];建设机械技术与管理;2009年02期
6 王梦恕;;中国铁路、隧道与地下空间发展概况[J];隧道建设;2010年04期
7 俞茂宏,彭一江;强度理论百年总结[J];力学进展;2004年04期
8 宫能平;陈明飞;;岩石动态断裂韧度温度相关性的实验研究[J];安徽理工大学学报(自然科学版);2013年04期
9 冉贤厚;;浅议全断面隧洞掘进机在引水隧洞施工中的应用[J];水利水电技术;2009年08期
10 金国栋;黄士芳;虞和霁;程凯;陈玉田;史维祥;;全断面岩石隧道掘进机盘刀破岩机理分析(上)[J];电站施工机械;1981年03期
相关博士学位论文 前2条
1 吴起星;复合地层中盾构机滚刀破岩力学分析[D];暨南大学;2011年
2 赵金昌;高温高压条件下冲击—切削钻孔破岩实验研究[D];太原理工大学;2010年
，本文编号：2127977
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2127977.html
