重型自航绞吸船天鲸号岩石输送分析

Rock transport of heavy-duty self-propelled cutter suction dredger Tian Jing Hao

针对国内外疏浚业缺乏关于岩石输送分析资料的现状,立足于泥泵及管路输送系统原理,以亚洲第一大重型自航绞吸船天鲸号输送岩石的施工数据为基础,对泥泵泥浆扬程换算系数和管路沿程摩阻系数分别进行反分析。对于风化较为严重且混有大量细颗粒成分的岩石与风化程度较弱几乎全部由岩块构成的两种岩石的泥泵泥浆扬程计算方法进行研究,验证经验公式的适用性,同时反分析得出输送两种岩石时的管路沿程摩阻系数。由于岩石的单轴饱和抗压强度不同,沿程摩阻系数差距很大,建议针对性地对项目的土质进行反分析得出沿程摩阻系数。

In view of the lack of rock transport information at home and abroad,this article performs a back analysis on the slurry pump head and pipe coefficient of friction resistance based on delivery system principle and operational data of Asia’s first heavy-duty self-propelled cutter suction dredger Tian Jing Hao.On this basis,the paper verifies the applicability of the empirical formulas and gets the pipe coefficient of friction resistance of two kinds of rock,one is weathered and mixed with a lot of fine-grained component,and the other is weakly-weathered rock which is almost totally blocks.Considering the pipe coefficient of friction resistance varyend from the hard of uniaxial compressive strength,it is recommended to calculate the pipe coefficient of friction resistance by performing a back analysis on the rock conditions.