土壤-金属界面接触系统黏附力变化规律研究  

Research on Change Law of Adhesionin Soil-metal Interface Contact System

作　　者：李强 陈志凯 徐秀杰 冯森 孔祥意 Li Qiang;Chen Zhikai;Xu Xiujie

机构地区：[1]江苏徐工工程机械研究院有限公司,江苏省徐州市221000 [2]徐工集团工程机械股份有限公司道路机械分公司

出　　处：《工程机械》2024年第9期36-41,I0017,共7页Construction Machinery and Equipment

基　　金：江苏省自然科学基金面上项目(BK2023020989)。

摘　　要：为研究工件表面形貌以及土壤含水率对黏性土壤黏附力的影响规律,通过表面喷砂处理制备不同表面粗糙度试样,并根据土工试验标准制备含水率土壤。对土壤-金属界面接触系统黏附力分析发现:不同粗糙度表面,黏附力随土壤含水率增加呈现先降低后增加,然后经历稳定波动区间后急剧下降的趋势;土壤塑限W_(P)<29.25%时,黏附力随粗糙度增加呈现先增加后下降的趋势;土壤液限W_(L)>63.27%时,黏附力随粗糙度增加呈现逐渐下降的趋势。分析认为界面接触面积和水膜是导致黏附力变化的主要原因,粗糙度与含水率存在合理匹配区间。该研究成果可为旋挖钻机筒钻、盾构掘进刀盘及挖掘机斗齿等减黏研究题提供理论与应用基础。To study the influence law of surface morphology of work pieces and water content in soil on adhesion of clayey soil,specimens with different surface roughness are prepared by surface sandblasting treatment,and soil with water content is prepared according to geotechnical test standards.It is found from the analysis of the adhesion of soil-metal interface contact system that,for surfaces with different roughness,the adhesion shows a trend of decrease first and then increase with the increase of water content in soil,and then experiences a stable fluctuation range followed by a sharp decline.When the plastic limit of soil W_(P)<29.25%,the adhesion shows a trend of increase first and then decrease with the increase of roughness.When the plastic limit of soil W_(L)>63.27%,the adhesion shows a trend of gradual decrease with the increase of roughness.The analysis suggests that the interface contact area and water film are the main reasons for adhesion changes,and there is a reasonable matching range between roughness and water content.The research results provide a theoretical and application basis for the research of adhesion reduction in barrel drills of rotary drilling rigs,cutter heads of shields and bucket teeth of excavators.

关 键 词：粗糙度 含水率 界面接触系统 黏附力 

分 类 号：TU60[建筑科学—建筑技术科学] TU41