【作者】 吕有界； 王玉兴； 唐艳芹； 胡圣荣；

【Author】 Lv Youjie1,2, Wang Yuxing1, Tang Yanqin1, Hu Shengrong1 (1 College of Engineering, South China Agricultural University, Guangzhou, Guangdong 510640, China; 2 Department of Marine Engine, Guangzhou Maritime College, Guangzhou, Guangdong 510725, China)

【机构】 华南农业大学工程学院；

【摘要】 介绍了防汛抢险螺旋桩及其沉桩设备,并根据螺旋桩结构与应用特点,结合典型土壤动物表面减粘降阻特性,提出对螺旋桩螺旋叶片进行表面仿生处理。采用台车牵引,进行了正交试验、单因素试验以及与平板的对比试验。为了消除载荷大小对试验结果的影响,引入曲面摩擦系数Mu,定义为台车匀速牵引力与表面垂直载荷的比值。试验表明,在试验因素取值范围内,波纹型仿生曲面凸起宽度对曲面摩擦系数影响显著,而且曲面摩擦系数随着波纹型仿生曲面凸起宽度的增大而减小;一定结构尺寸的波纹型仿生曲面具有一定的防粘减阻效果。更多还原

【Abstract】 Screw pile for preventing flood and rushing to deal with an emergency and its driving equipment was introduced. Unsmoothed bionics design for screw pile’s laminae was brought forward according to the structure and application characteristics of screw piles, and the resistance reduction characteristic of typical soil animals. With the traction of a trolley, an orthogonal experiment for wave plate was designed, and the contrast between unsmoothed wave plate and smoothed plate was made. In order to eliminate the influence of loads on experimental results, a surface frictional coefficient named Mu was introduced, which is the ratio of trolley’s traction force and vertical load. The experimental results showed, within the experimental factor’s levels, the width of unsmoothed wave plate’s protruding part affects the surface frictional coefficient notably, and the surface frictional coefficient decreases with the increase of the width, and that bionics wave plates can reduce adhesion and resistance to soils.更多还原