【摘要】 430—A型管片安装时出现裂缝 ,是引黄国际Ⅱ、Ⅲ标工程采用TBM法施工中出现的第一个较严重的质量问题。该文通过对现场资料的分析 ,并通过现场试验和对机械的调整 ,使这一问题得到解决。更多还原

【Abstract】 A segment is used to the lining of tunnel when constructing tunnel with TBM method in the International Bids Ⅱand Ⅲ of the YRDP.Crack had occurred in some segments when 430-A segment was installed.In this paper,through analysis on on-situ data,the occurring of the crack is thought to be in comprehensive reasons.Through the on-situ observation and test,the crack preventing measures have been found,those are increasing a little amount of tensile reinforcement in the segment,adjustment of the equipment,elongation of curing time and etc.更多还原