盾构下坡掘进对推进阻力的影响研究

发布时间：2018-03-05 16:41

本文选题：盾构　切入点：下坡掘进　出处：《隧道建设》2017年04期 　论文类型：期刊论文

【摘要】：以神华新街6°煤矿斜井盾构工程为背景,针对盾构下坡掘进工况,通过建立盾构上作用的水土压力载荷与坡度的数学关系模型,推导出推进阻力与坡度的数学公式。结合工程实例,计算水平掘进与6°下坡掘进各推进阻力值,并利用MATLAB软件绘制下坡掘进时推进阻力随坡度变化的曲线。结果表明:1)6°下坡掘进的总推进阻力相对于水平掘进仅减小了约8%,坡度小于13°时,可通过水平掘进时的推进阻力减去重力沿掘进轴线上的分量来近似求得,且偏差小于10%;2)总推进阻力会随坡角的不断增大而减小;3)当坡度大于50.4°后,盾构有自动向下滑移的趋势,刀盘将自动压紧开挖面,导致刀具自动嵌入开挖面,增加了启动扭矩与换刀的难度。
[Abstract]:God in 6 degrees inclined coal Huaxin Street tunnel project as the background, the shield tunneling through the downhill mathematical model, load and slope water and soil pressure on the shield is established, mathematical formula to promote resistance and slope is deduced. Combined with practical engineering, calculation of horizontal excavation and 6 degree downhill driving the propelling resistance value, and promote the curve with slope resistance when driving downhill drawn by MATLAB software. The results show that: 1) 6 degree downhill driving total propelling resistance with respect to the horizontal tunneling only decreases about 8%, the slope is less than 13 degrees, the level of driving the propelling resistance along the axis of gravity minus the driving component and the deviation is calculated approximately. Less than 10%; 2) total propelling resistance will decrease with the increase of slope angle; 3) when the slope is greater than 50.4 degrees, the shield automatic sliding downward trend, the cutter will automatically compress the excavation surface, resulting in automatic tool The insertion of the excavation face increases the difficulty of starting torque and changing the knife.

【作者单位】：西南交通大学机械工程学院;
【基金】：国家科技支撑计划(2013BAB10B00)
【分类号】：U455.43

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