降低盾构刀具磨损的泥浆添加剂应用试验研究

Application Experimental Study of Slurry Additives to Reduce Wear of Shield Cutters

刀具磨损是盾构工程施工面临的一大难题,在高石英含量的复杂地层中表现尤为突出。通过对刀具金属和超硬材料表面磨损原理的分析,结合研磨试验,揭示泥浆的润滑性、散热性和流动性是影响研磨程度的3项性能。运用化学理论、材料技术和流体力学,分析降磨损泥浆添加剂的可遴选品种;通过综合试验,研发出一种有效降低盾构刀具磨损的泥浆类型,将磨损量降低到30%以上。

Tool wear is a major problem in shield engineering construction, especially in complex formations with high quartz content. Through the analysis of the surface wear principle of tool metal and super-hard materials, combined with the grinding test, it is revealed that the lubricity, heat dissipation and fluidity of the mud are three properties that affect the degree of grinding. Using chemical theory, material technology and fluid mechanics to analyze the selection of wear-reducing mud additives; through comprehensive tests, a mud type that effectively reduces the wear of shield cutters has been developed, reducing wear to more than 30%.