West Route of South-North Water Transfer Project,situated in southeastern Qinghai-Tibet Plateau,is a giant project,which will deliver 17 billion m3 of water from the main stream and tributaries upstream of the Yangtze...West Route of South-North Water Transfer Project,situated in southeastern Qinghai-Tibet Plateau,is a giant project,which will deliver 17 billion m3 of water from the main stream and tributaries upstream of the Yangtze River to the upper reaches of the Yellow River. It is to be constructed in 3 stages, of which the 1st stage project includes delivering 4 billion m3 of water by gravity from two tributaries of Yalong River and three tributaries of Dadu River. The project consists of 5 dams,7 tunnels and a channel in series,with the dam height of 63～123 m and water transfer length of 260.3 km,of which the tunnels measure 244.1 km. The special climatic,environmental and geologic conditions make the project much more complicated in construction,especially 3 tunnels with the length longer than 50 km each create challenges to the technical requirements of engineering survey,design and construction.展开更多
刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的...刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。展开更多
文摘West Route of South-North Water Transfer Project,situated in southeastern Qinghai-Tibet Plateau,is a giant project,which will deliver 17 billion m3 of water from the main stream and tributaries upstream of the Yangtze River to the upper reaches of the Yellow River. It is to be constructed in 3 stages, of which the 1st stage project includes delivering 4 billion m3 of water by gravity from two tributaries of Yalong River and three tributaries of Dadu River. The project consists of 5 dams,7 tunnels and a channel in series,with the dam height of 63～123 m and water transfer length of 260.3 km,of which the tunnels measure 244.1 km. The special climatic,environmental and geologic conditions make the project much more complicated in construction,especially 3 tunnels with the length longer than 50 km each create challenges to the technical requirements of engineering survey,design and construction.
文摘刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。
