CAJ | 학술논문

大跨扁平连拱隧道设计上具有开挖跨度大和断面扁平的特点,而在施工中,由于其施工工序较多,围岩将受到多次扰动,衬砌结构也将受开挖的多次影响.因此,其受力和变形极为复杂,施工过程中开挖时空效应与四车道连拱隧道或分离式隧道存在较大的差异.利用"公路隧道结构与围岩综合实验系统(CTSSSRH)",对大跨扁平连拱隧道的施工动态全过程进行了三维物理模拟,分析了围岩位移、应力随开挖步的变化规律,提出了大跨扁平连拱隧道施工时空效应.
대과편평련공수도설계상구유개알과도대화단면편평적특점,이재시공중,유우기시공공서교다,위암장수도다차우동,츤체결구야장수개알적다차영향.인차,기수력화변형겁위복잡,시공과정중개알시공효응여사차도련공수도혹분리식수도존재교대적차이.이용"공로수도결구여위암종합실험계통(CTSSSRH)",대대과편평련공수도적시공동태전과정진행료삼유물리모의,분석료위암위이、응력수개알보적변화규률,제출료대과편평련공수도시공시공효응.
For the large span and flat, together with the interaction effect of construction and disturbance of surrounding rock, the mechanical of large span and flat multi-arch tunnel is very complicated, and the time space effect is different from that of two-lane multi-arch tunnel or separated tunnel. Adopting the "CTSSSRH", the 3-D dynamic process of the tunnel construction was simulated. Analyzing the rule of surrounding rock displacement and stress with excavation, the time-space effect of large span and flat multi-arch tunnel was proposed.