摘要
通过观景口水利枢纽长距离岩石顶管工程的实践,认为中继间的合理布置是确保施工顺利的重要环节。而管节摩阻力的预测是中继间合理布置的前提,岩石地层中管道与岩石接触状态不同于一般土层,管节在泥浆浮力与底部沉渣作用下与围岩的接触处于动态变化中,因而现有的管道与土摩阻力计算公式并不适用于中继间间距布置。该工程采用理论分析及工程应用方法,在印证管道与岩石接触模型的基础上,提出了适用于长距离岩石顶管中继间布置的方法,可为类似工程提供参考。
Based on practices of long distance rock pipe jacking of the Guanjingkou Multi-purpose Project,it is found that layout of relay room is crucial for the success of construction.The prediction of pipe joint friction is the premise of reasonable layout between relays.Since the contact state between pipeline and rock in rock stratum may be different from that in general soil layer,the contact between pipe joint and surrounding rock under the action of mud buoyancy and bottom sediment is in dynamic change.Therefore,the existing calculation formula of pipe and soil friction may not suit for the spacing layout between relays.Based on confirmation of contact model between pipeline and rock,a method suits for the layout of long distance rock jacking relay room is proposed,which may be referenced by similar projects.
作者
张绍炜
刘新荣
邓志云
钟祖良
Zhang Shaowei;Liu Xinrong;Deng Zhiyun;Zhong Zuliang
出处
《中国水利》
2021年第19期41-43,共3页
China Water Resources
基金
国家重点研发计划课题(2018YFC1504802)
重庆市技术创新与应用示范专项社会民生类重点研发项目(cstc2018jscx-mszdX0071)
重庆市研究生科研创新项目(CYS19005)。
关键词
长距离
岩石顶管
摩阻力
中继间
long distance
rock pipe jacking
friction
relay room
