基于SMP准则的土压平衡盾构刀盘扭矩计算研究

发布时间：2018-01-12 00:30

本文关键词：基于SMP准则的土压平衡盾构刀盘扭矩计算研究　出处：《地下空间与工程学报》2017年04期 　论文类型：期刊论文

【摘要】：由于目前的刀盘扭矩计算公式中没有考虑土体中间主应力的效应,使其理论计算值较实际偏小幅度过大。为此,笔者通过松岗-中井(SMP)准则引入中间主应力对常规三轴试验测得的内摩擦角进行修正,同时对内摩擦角修正前后的数值予以了比较,结果发现,改进后的内摩擦角与原来相比最大可提高约13%。将修正后的内摩擦角代入扭矩计算公式中,得到了土压平衡盾构刀盘扭矩计算修正模型。并针对鐖600 mm模拟土压平衡盾构掘进机进行刀盘扭矩计算及其试验验证,结果表明,该模型的计算结果与试验测得值相吻合,与未考虑中主应力的理论相比其值增加了17%,提高了理论计算结果的精度。
[Abstract]:Because the effect of intermediate principal stress is not taken into account in the current calculation formula of cutter head torque, the theoretical calculation value is too much smaller than that in practice. The internal friction angle measured by conventional triaxial test is modified by introducing the intermediate principal stress into the SMPC criterion. At the same time, the values of the internal friction angle before and after the modification are compared, and the results are found. The modified internal friction angle can be increased by about 13 percent compared with the original one. The modified internal friction angle can be added to the torque calculation formula. A modified model for calculating the torque of the earth pressure balanced shield tunneling machine is obtained, and the torque calculation of the cutter head and its test verification for the 600 mm simulated earth pressure balanced shield tunneling machine are carried out, and the results show that the model can be used to calculate the torque of the cutter head. The calculated results of the model are in good agreement with the measured values of the experiment. Compared with the theory without considering the principal stress, the calculated results are increased by 17% and the accuracy of the theoretical results is improved.
【作者单位】：北方工业大学土木工程学院;
【分类号】：U455.39
【正文快照】： 0引言随着城市地铁的不断发展,土压平衡盾构机得到了更为广泛的应用,与其相关联的技术问题也越来越受各个相关单位的重视。其中刀盘扭矩是盾构设计制造及掘进的重要参数之一,刀盘扭矩设计过大往往造成资源的浪费,增加了工程的成本;而设计过小就会导致盾构不能正常推进,严重影

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