摘要
结合杭州望江路隧道工程泥水盾构环流系统,分3部分建立排浆管管道模型,针对泥浆流速与泥浆密度对泥水盾构环流系统管路压力损失及携渣特性的影响展开研究,并根据仿真模型得到的实际施工参数下的压力损失和分布情况,计算渣浆泵的安装位置。结果表明:增大管径可以降低管道的压力损失,该影响随管径的增大逐渐减弱;压力损失与泥浆密度的增大近乎成正比;压力损失随入口速度增大而增大,且增长趋势随速度增大而增大。泥浆入口速度是影响管道输送能力的重要因素,石渣的输送量随着泥浆入口速度的增大呈幂指数关系增大;随着泥浆流速的增大,泥浆密度对石渣堆积质量的影响会被削弱。
Based on the slurry shield circulation system of Wangjiang Road Tunnel Project in Hangzhou,a model of drainage pipe was built in three parts.The effects of mud velocity and mud weight on pipeline pressure loss and slag-carrying characteristics of slurry shield circulation system were studied.According to the pressure loss and distribution under the actual construction parameters obtained by the simulation model,the installation position of the drainage pump was calculated.The results showed that the pressure loss could be reduced with the increased of pipe diameter,and the effect was gradually reduced with the increase of pipe diameter.The pressure loss was almost proportional to the mud density and increases with the increase of inlet velocity,and the growth trend increased with the increase of velocity.Mud inlet velocity was an important factor affecting the conveying capacity of pipeline.With the increase of mud flow rate,the influence of mud weight on the accumulation quality would be weakened.
作者
陈健
薛峰
赵合全
房中玉
CHEN Jian;XUE Feng;ZHAO Hequan;FANG Zhongyu(China Railway 14th Bureau Group Co.,Ltd.,Jinan 250014,Shandong,China;China Railway 14th Bureau Group Big Shield Engineering Co.,Ltd.,Hangzhou 310000,Zhejiang,China)
出处
《隧道与地下工程灾害防治》
2020年第2期83-91,共9页
Hazard Control in Tunnelling and Underground Engineering
基金
国家自然科学基金资助项目(高铁联合基金U1834208)。
关键词
泥水盾构
环流系统
压力损失
携渣特性
slurry shield
circulation system
pressure loss
slag carrying characteristics
