盾构刀盘开口率对掘进参数影响的模型试验研究

发布时间：2018-04-21 18:06

本文选题：模型试验 + 刀盘开口率　；参考：《现代隧道技术》2017年02期

【摘要】：文章通过模型试验,对盾构开挖过程中刀盘开口率对盾构各参数之间的影响进行了研究,试验监测了不同刀盘开口率条件下盾构土舱面板处压力的变化情况以及土压力的传递和分布状态,研究了盾构刀盘开口率引起的土舱内外压力变化规律,同时对开挖面和土舱面板之间的压差进行了讨论,基于试验研究内容,进一步利用粘性流体力学理论建立了相关公式,可以简要分析土舱内外压差的影响因素;讨论了刀盘开口率对刀盘挤土效应和刀盘扭矩的影响关系,提出了两种不同的挤土效应机制,试验结果显示仅靠刀盘推力引发的挤土效应约占全部挤土效应的70%,刀盘转动引发的挤土效应占30%左右,系统分析了刀盘开口率、刀盘扭矩以及挤土效应之间的内在关联。
[Abstract]:Through the model test, the influence of the opening rate of the cutter disk on the parameters of the shield is studied in the process of shield excavation. The change of pressure and the transmission and distribution of the earth pressure are monitored under the conditions of the opening rate of different cutters, and the internal and external pressure caused by the opening rate of the shield cutter disc is studied. At the same time, the pressure difference between the excavation face and the soil chamber panel is discussed. Based on the experimental research content, the relevant formula is established by using the viscous fluid mechanics theory. The influence factors of the pressure difference between the inside and outside of the cabin can be analyzed briefly, and the relationship between the opening rate of the cutter disk and the torque of the cutter disk and the torque of the cutter disk is discussed. Two different mechanism of soil squeezing effect is made. The results of the experiment show that the effect of the earth squeezing only on the thrust of the knife plate accounts for about 70% of the total soil squeezing effect, and the effect of the earth squeezing is about 30%. The internal relationship between the opening rate of the knife disc, the torque of the cutter disk and the effect of the soil compaction is analyzed systematically.

【作者单位】：北京交通大学土建学院;
【分类号】：U455.43

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