CAJ | 학술논문

海底隧道不同围岩级别所采用的防排水方式不同。Ⅰ、Ⅱ级围岩采用限量排导的防排水方案，Ⅳ、Ⅴ级较差围岩地段衬砌结构采用全封闭防排水方案。基于扩展有限元法，以厦门海底隧道为例，针对海底隧道不同防排水条件下的衬砌结构开裂情况进行研究，为今后其他高水压水下隧道设计和海底隧道的病害原因分析提供一定的参考价值。研究表明：采用堵水限排的条件下Ⅱ级围岩的衬砌结构未发生衬砌结构开裂，结构设计合理；而采用全封闭防排水结构的 V 级围岩的衬砌结构在低水压条件下拱脚外侧发生纵向开裂，而在高水压条件下衬砌拱脚会同时出现纵向裂缝和压溃破坏。鉴于目前隧道结构开裂主要以环向裂缝为主，且主要集中于拱墙以上部位，所以高水压并不是厦门海底隧道衬砌开裂的主要原因。
해저수도불동위암급별소채용적방배수방식불동。Ⅰ、Ⅱ급위암채용한량배도적방배수방안，Ⅳ、Ⅴ급교차위암지단츤체결구채용전봉폐방배수방안。기우확전유한원법，이하문해저수도위례，침대해저수도불동방배수조건하적츤체결구개렬정황진행연구，위금후기타고수압수하수도설계화해저수도적병해원인분석제공일정적삼고개치。연구표명：채용도수한배적조건하Ⅱ급위암적츤체결구미발생츤체결구개렬，결구설계합리；이채용전봉폐방배수결구적 V 급위암적츤체결구재저수압조건하공각외측발생종향개렬，이재고수압조건하츤체공각회동시출현종향렬봉화압궤파배。감우목전수도결구개렬주요이배향렬봉위주，차주요집중우공장이상부위，소이고수압병불시하문해저수도츤체개렬적주요원인。
The waterproof and drainage way are not always similar to each other in the different level of surround-ing rock of subsea tunnel,among which the principle of controlled drainage was used in the hard surrounding rock I andⅡ,and the entire plugging method can be applied to the surrounding rock of poor quality,such as the level of Ⅳ and Ⅴ.Based on the XFEM,the actual cracking of Xiamen Subsea Tunnel will be taken in a re-search in different condition of waterproof and drainage,which can be available to provide some useful sugges-tions for the building of other high -pressure tunnels and making cause analysis of lining crack.The research re-sults show that it is not happened to the crack of tunnel lining in the case of controlled drainage of surrounding rock level Ⅱ and the design is reasonable.It also turns out that the outside of arch springing of tunnel lining is cracked in the condition of whole block of surrounding rock level Ⅴ.Both the crushing and cracking of concrete lining will happen under the condition of higher water pressure,which need to be structural reinforced in the rel-evant position of tunnel lining cracks.Besides,based on tunnel lining diseases until now,which mainly are cir-cumferential cracks and located in some parts above the arch wall,it is found that the high water pressure isn’t the main reason of lining cracking of Xiamen subsea tunnel.