摘要
不同盾构工程对泥水系统的处理能力有不同要求,通常盾构直径越大、掘进速度越快,对泥水处理能力要求越高。在大直径盾构的施工中,若要全断面对膨胀性黏土地层进行穿越,那么就很容易产生大产量且难以分离的泥浆,还会使黏土块在刀盘上黏附,此外,也会产生排泥系统的堵塞等问题,施工效率也会被以上问题所影响。针对扬州瘦西湖工程地质特性,针对环流系统施工面临问题,对冲刷、环流系统进行改进,对盾构穿越泥水进行计算,并提出保证泥浆处理采取的各种措施,保证了超大直径泥水盾构穿越全黏土地层顺利实施。
Different shield engineering has different requirements for the treatment capacity of the muddy water system. The larger the shield diameter and the faster the tunneling speed, the higher the requirements for the treatment capacity. For the large diameter shield passing through the expanding clay formation, the mud amount is large and difficult to separate. The problems of claystone adhered on the cutter and clogging mud discharge system affect the construction efficiency. According to the engineering geological characteristics of the Slender West Lake in Yangzhou, in view of the problems faced in the construction of the circulation system, the erosion and circulation system are improved, the mud is calculated, and various measures are put forward to ensure the mud treatment. Therefore, the super-large diameter mud shield passing through the whole clay formation is successfully implemented.
作者
魏向明
Wei Xiangming(China Railway 14^th Bureau Group Co.Ltd.,Jinan Shandong 250014,China)
出处
《铁道建筑技术》
2018年第7期77-80,共4页
Railway Construction Technology
基金
山东省技术创新项目(201221901008)
江苏省建设系统科技计划项目(JH09)
中国铁建股份有限公司科技研发计划项目(12-C16)
