CAJ | 학술논문

特大断面公路隧道大多采用双侧壁导坑方式施工,临时支护在施工过程中起着至关重要的重要.对于不偏压隧道先拆除左或右侧临时支护影响不大,而对于偏压隧道,埋深浅侧的临时支护先拆除,还是埋深深侧的临时支护先拆除对初期支护受力有较大影响.通过对广州龙头山特大断面隧道公路偏压隧道的数值计算,分析了偏压隧道左、右侧导洞的临时支护拆除方式对初期支护弯矩和变形的影响,提出了特大断面偏压隧道基于双侧壁导坑开挖方式的临时支护合理的拆除方式.
특대단면공로수도대다채용쌍측벽도갱방식시공,림시지호재시공과정중기착지관중요적중요.대우불편압수도선탁제좌혹우측림시지호영향불대,이대우편압수도,매심천측적림시지호선탁제,환시매심심측적림시지호선탁제대초기지호수력유교대영향.통과대엄주룡두산특대단면수도공로편압수도적수치계산,분석료편압수도좌、우측도동적림시지호탁제방식대초기지호만구화변형적영향,제출료특대단면편압수도기우쌍측벽도갱개알방식적림시지호합리적탁제방식.
Twin-side heading way is mainly used in large section load tunnel, temporary support play an important role during the construction. For the un-biasing tunnel, removing left firstly or right temporary support is not important, however, for biasing tunnel, removing left firstly or right temporary support has large effect on the internal force of preliminary bracing. By the numerical calculation on Longtoushan large section load tunnel, the paper analyzes temporary support's removing way effects on bending moment and axial of preliminary bracing, and put up the proper temporary support's removing way on the large section load tunnel based on the twin-side heading way.