基于黏土挖掘的绞刀模型试验研究

Cutter model experiment based on clay excavation

针对我国疏浚技术基础理论研究落后,数值模拟绞刀挖掘黏土不准确等问题,通过理论研究、小规模试制的方法,制备了目标试验用黏土,并研制了一款适用于实验室使用的模型黏土绞刀。在此基础上开展了模型绞刀挖掘黏土的实验室研究,分析绞刀转速、横移速度、泥层厚度、前移距等工艺参数对挖掘试验泥浆浓度的影响规律。得出其选取原则:选择中等绞刀转速,适当降低横移速度,以及在确保桥架前端不阻碍横摆的条件下,优先选用增加前移距的方法提高挖掘断面面积。该研究成果可为黏土挖掘工艺参数的选取提供参考。

Aiming at the problems of backward basic theoretical research of dredging technology and inaccurate numerical simulation of cutterhead excavating clay in China, through the methods of theoretical research and small-scale trial production, the target experimental clay is prepared, and a model clay cutterhead suitable for laboratory use is developed. On this basis, the laboratory experimental research of model cutterhead excavating clay was carried out, and the influence of the process parameters such as the rotating speed of cutterhead, traverse speed, mud layer thickness and forward displacement distance on the mud concentration of excavation test was analyzed. The principle is selecting the medium cutter speed, appropriately reducing the traverse speed, and giving priority to the method of increasing forward displacement distance to improve the excavation section area under the condition of ensuring that the front end of the bridge does not hinder the yaw. The research results can provide a reference for the selection of clay excavation process parameters.