CAJ | 학술논문

李子坝隧洞埋深较浅,进出口围岩较软弱,隧洞上方房屋密布,且有一居民用水塔.根据工程实际,隧洞初期支护采用超前管棚+工字钢架+喷射混凝土进行联合支护;隧洞底部灌浆并施作仰拱;二次支护采用钢筋混凝土直边墙半圆拱.为确保施工安全及施工过程中地表建筑物的稳定,对隧洞稳定性进行理论计算,求得在此状态下,最危险断面处隧洞的稳定性系数为1.9;施工过程中对地表房屋、水塔、隧洞拱顶及边墙的变形及沉降情况进行监测.监测结果表明,地表建筑物沉降量均较小;水塔沉降量小且各点下沉协调一致,则水塔不会倾倒;隧洞拱顶及边墙变形均较小.
리자패수동매심교천,진출구위암교연약,수동상방방옥밀포,차유일거민용수탑.근거공정실제,수동초기지호채용초전관붕+공자강가+분사혼응토진행연합지호;수동저부관장병시작앙공;이차지호채용강근혼응토직변장반원공.위학보시공안전급시공과정중지표건축물적은정,대수동은정성진행이론계산,구득재차상태하,최위험단면처수동적은정성계수위1.9;시공과정중대지표방옥、수탑、수동공정급변장적변형급침강정황진행감측.감측결과표명,지표건축물침강량균교소;수탑침강량소차각점하침협조일치,칙수탑불회경도;수동공정급변장변형균교소.
The buried depth of Liziba tunnel is shallow, and surrounding rocks at entrance and exit are soft. Many houses and one water tower have been constructed over the tunnel. According to the engineering condition, the ahead ductile, I-steel and shotcrete are used in the first support, grounting and inverted arch are constructed at tunnel bottom, and the semicircular arch of reinforced concrete is used in the second lining. To ensure the construction safety and the building stability during construction, the stability of the most dangerous section is calculated, and the calculated stability factor is 1.9. The settlements of the surface, the water tower and the houses are monitored, and the arch settlement and horizontal convergence of the side-wall are monitored, too. The results show that settlements of the surface and the houses are little, the settlement of water tower goes down equably, and the deformations of arch and side-wall are little, too.