Soft Rock Cutting Mechanics Model of TBM Cutter and Experimental Research
Soft Rock Cutting Mechanics Model of TBM Cutter and Experimental Research
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DOI：
10.1007/978-3-642-10817-4_38
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发表时间：
2009-12
期刊：
影响因子：
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通讯作者：
Jing Xue;Yi-min Xia;Zhiyong Ji;Xiwen Zhou
中科院分区：
文献类型：
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作者：
Jing Xue;Yi-min Xia;Zhiyong Ji;Xiwen Zhou
基于脆性拉伸断裂理论，假设岩石破坏为拉伸破坏，建立了刀具载荷计算模型，考虑刀具前方致密岩心的冲击作用，分析了刀具与岩石的作用机理，以及岩石的脆性断裂过程，得到了盾构刀具的水平切削力和垂直推进力表达式。同时，设计了三种不同前角的刀具，并在直线切削性能试验台上进行了切削试验。通过对比，实验结果与力学模型基本一致，水平切削力误差在7%以内，垂直推进力误差在9%以内。最后，通过实验证明了刀具的切削力随着切削深度的增加或前角的减小而沿着增大。
On the basis of brittle tensile fracture theory, assuming the destruction of rock was due to tensile failure, a cutting-tool loading calculation model was established, considering the compact core impact in front of cutting-tool, then the mechanism of cutter-rock, as well as the process of brittle fracture of rock were analyzed and the expressions of horizontal cutting force and vertical propulsive force for the shield cutter were obtained. At the same time, three kinds of cutters with different rake angle were designed, and the cutting experiments on a linear cutting performance testing station were carried out. By comparing, the results of experiments were basically in accordance with those of mechanical model, error rate of horizontal cutting force was below 7% and that of vertical propulsive force was in the scope of 9%. At last, the experiments proved that the force of cutter would increase along with the increasing depth, or decreasing rake angle.