Agitation Resistance of Muck on Rotary Digging of Underground

地下旋挖中淤泥的搅动阻力

• 批准号: 06650280
• 负责人: ABE Masajiro
• 金额: $ 1.22万
• 依托单位: Nagaoka University of Technology (NUT)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650280/
• 关键词: Underground rotary digging; Muck; Rotary digging resistance; Agitation resistance; Flowage; Scale model experiment; Distinct Element Method; Dynamic analysis

On designing underground rotary digging machine, it is the most important problem to estimate the optimum equipment torque of the electric motor which drives the rotary digging parts of the machine and to prevent the clog of the muck filled in the chamber. In this study, earth pressure balanced shield machine is investigated. The purpose of this study is to make clear the agitation resistance and the state of muck flowage in the chamber theoretically and experimentally. First, the influence of the muck properties and the rotational freguency of intermediate beams on the agitation resistance and the state of muck flowage were investigated and the relation between the agitation resistance and the state of muck flowage in chamber of a scale model was studied. The scale model is a 1/10 scale model for chamber part of actual machine. On the agitation resistance, the results of the experiment were compared with the calculation results by simple estimation method, and the matters to pay attention in the simple estimation method were shown. The scale modeling theory between the results of the scale model experiment and those of actual machines was examined to estimate the agitation resistance of actural machine with refering to the construction results of actual machine. Moreover, the muck agitation resistance and the state of muck flowage were analyzed theoretically by using Distinct Element Method (DEM). The results were compared with the experimental ones. The usefulness of DEM has been verified and the guide to improve DEM for agitation analysis has been shown. In this study, the mechanism for the agitation resistance to occur has been clarified on earth pressure balanced shield machine. After this, the study on different structure types and operating conditions for underground having various kinds of geological features should be continued. This leads to getting the basic data to conduct the optimum design of shield machines.

在设计地下旋转挖掘机时，估算驱动机器旋转挖掘部件的电动机的最佳设备扭矩并防止填充在腔室中的渣土堵塞是最重要的问题。本研究对土压平衡盾构机进行了研究。本研究的目的是从理论上和实验上明确搅拌阻力和舱内渣土流动状态。首先，研究了渣土特性和中间梁旋转频率对搅拌阻力和渣土流动状态的影响，并研究了缩比模型室内搅拌阻力和渣土流动状态之间的关系。比例模型是实际机器的室部分的1/10比例模型。对于搅拌阻力，将实验结果与简易估算法的计算结果进行了比较，并指出了简易估算法中应注意的事项。检验缩尺模型实验结果与实机结果之间的缩尺建模理论，结合实机施工结果估算实机搅拌阻力。并利用离散元法(DEM)对渣土搅拌阻力和渣土流动状态进行了理论分析。结果与实验结果进行了比较。 DEM 的实用性已得到验证，并显示了改进 DEM 用于搅拌分析的指南。本研究阐明了土压平衡盾构机出现搅动阻力的机理。此后，应继续对具有各种地质特征的地下不同结构类型和运行条件进行研究。这有助于获得基础数据以进行盾构机的优化设计。