CAJ | 학술논문

通过对某高速公路超浅埋大跨度连拱隧道下穿既有国道的施工方法比选分析，利用大型有限元软件进行施工数值模拟，分析认为，采用大管棚超前支护、中导洞－双侧导洞法配合地层注浆加固的施工方法可以满足沉降要求，且保证了既有国道车流不中断，施工过程中拱部衬砌封闭成环时间是控制地表沉降的关键，本工程的成功实施为类似隧道施工提供了经验借鉴。
통과대모고속공로초천매대과도련공수도하천기유국도적시공방법비선분석，이용대형유한원연건진행시공수치모의，분석인위，채용대관붕초전지호、중도동－쌍측도동법배합지층주장가고적시공방법가이만족침강요구，차보증료기유국도차류불중단，시공과정중공부츤체봉폐성배시간시공제지표침강적관건，본공정적성공실시위유사수도시공제공료경험차감。
In this paper,construction methods of the great shallow-buried and large span arched tunnel across existing national road in expressway have been compared and analyzed.And finite element software has been used to simulate the construction process.The analysis shows adopting the large shed-pipe advance support method and middle pilot-twin-side heading method combined with strata grouting re-inforcement method can meet settlement requirements.And these methods can also ensure that the exist-ing national highway traffic is not interrupted.In the process of construction,the time when the arch lin-ing closed is the key to control the surface settlement.The successful implementation of this project is to provide a similar tunnel experience for others.