砂岩磨蚀性在“天鲲号”绞吸挖泥船挖掘过程中的应用  

Application of sandstone abrasiveness in excavation process of cutter suction dredger “Tiankun”

作　　者：张更生 殷瑞林[1] 曹凯 李能 ZHANG Geng-sheng;YIN Rui-lin;CAO Kai;LI Neng(CCCC Tianjin Eco-environmental Protection Design&Research Institute Co.,Ltd.,Tianjin 300202,China;Tianjin Key Laboratory for Dredging Engineering Enterprises,CCCC Tianjin Dredging Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]中交(天津)生态环保设计研究院有限公司,天津300202 [2]中交天津航道局有限公司,天津市疏浚工程技术企业重点实验室,天津300457

出　　处：《水运工程》2022年第6期226-231,共6页Port & Waterway Engineering

摘　　要：广西某港航道扩建工程,重型绞吸船“天鲲号”疏浚典型风化砂岩时刀齿出现磨蚀和断裂现象,影响施工效率发挥。在分析疏浚风化砂岩抗拉强度和矿物成分特性指标基础上,结合疏浚岩石磨蚀性理论,推导出广西钦州砂岩磨蚀性指数与绞刀刀齿消耗的经验性关系公式,用来预测重型绞吸船挖掘风化岩石的绞刀齿消耗量。研究结果表明:1)中风化砂岩岩体完整性较好,单轴饱和抗压强度为9~41 MPa,疏浚岩土工程特性分级为12~13级。施工中风化砂岩岩体时绞刀刀臂和刀齿磨蚀断裂问题突出,中风化砂岩是影响疏浚效率的关键土质。2)创新性引入改进的Schimazek值F理论,综合考虑矿物成分种类、矿物含量、矿物硬度、岩石粒度和岩石饱和抗拉强度因素,来评估岩石材料的磨蚀性。3)基于疏浚岩石磨蚀性理论和施工参数,推导出“天鲲号”万方刀齿消耗量和改进Schimazek值F之间公式。4)预测“天鲲号”万方刀齿消耗量计算值和实测值的相对偏差绝对值在17.3%以下,可靠性良好,为疏浚岩石提供技术支撑。In the channel expansion project of a port in Guangxi,the cutter teeth of the heavy-duty cutter suction dredger “Tiankun” are worn out and fractured during the dredging operation of typical weathered sandstone,which affects the efficiency of construction.On the basis of analyzing the tensile strength and mineral composition characteristic indexes of the dredged weathered sandstone,we deduce the empirical relationship formula between the abrasiveness index of the sandstone in Qinzhou of Guangxi and the consumption of cutter teeth by the theory of dredged rock abrasiveness.This formula is used to predict the consumption of cutter teeth for digging weathered rocks by a heavy-duty cutter suction dredger.The research results reveal that 1)the integrity of the moderately weathered sandstone rock mass is good,with the uniaxial saturated compressive strength of 9-41 MPa and the geotechnical engineering property grading of the dredging as Level 12-13.In the dredging of the moderately weathered sandstone rock mass,the problems of abrasion and fractures of the cutter arm and teeth are prominent,and the moderately weathered sandstone is the key soil quality that affects dredging efficiency.2)The improved theory of Schimazek’s F value is innovatively introduced to evaluate the abrasiveness of rock materials by comprehensively considering mineral compositions,mineral content,mineral hardness,rock particle size,and saturated tensile strength of rock.3) On the basis of the theory of rock abrasiveness and construction parameters of dredging,the formula between the cutter teeth consumption of “Tiankun” per 10,000 cubic meters and the improved Schimazek’s F value is derived.4) The absolute relative deviation between the calculated value and the measured value of the cutter tooth consumption of “Tiankun” per 10,000 cubic meters is less than 17.3%,which indicates good reliability and can provide technical support for rock dredging.

关 键 词：疏浚工程 风化砂岩 磨蚀性 刀齿消耗 

分 类 号：U616[交通运输工程—船舶及航道工程]