大直径盾构管片斜螺栓渗漏水通病成因探讨

Discussion on the Water Leakage Cause of Inclined Bolts of Large Diameter Shield Segments

大直径盾构隧道渗漏水相比于常规盾构隧道呈现一定的特殊性。本文以大直径盾构管片纵向斜螺栓渗漏水为研究对象,从密封圈、螺栓预紧、混凝土结构破坏三个方面进行分析讨论,指出斜螺栓渗漏水的成因,并从源头出发提出相应预防控制措施,以减少斜螺栓渗漏水的发生。

Compared with conventional shield tunnel,the leakage of large-diameter shield tunnel has got some particularity.Taking the longitudinal inclined bolt leakage of large-diameter shield segment as the research object,this paper analyzes and discusses from three aspects:sealing ring,bolt pre-tighting and concrete structure damage,and it points out the causes of inclined bolt leakage,and puts forward corresponding prevention and control measures from the source to reduce the occurrence of inclined bolt leakage.