CAJ | 학술논문

以目前国内规模最大的广州龙头山隧道为背景,详细介绍特大断面公路隧道施工过程中变形现场监测的项目、方法及手段,对洞口边坡及不同围岩情况下的隧道变形规律进行分析,并提出控制大变形的工程措施.研究结果表明:(1) 右导洞上台阶、左导洞下台阶和核心土上台阶开挖引起围岩较大变形,是隧道施工主要控制点;(2) 特大断面隧道围岩变形与洞周半径近似成指数函数关系;(3) 封闭支护结构及对拉锚杆的使用是改善结构受力和抑制隧道变形的有效途径,应尽早施作仰拱以形成封闭环.研究成果可为日后类似工程的设计、施工和研究提供有益的借鉴和参考.
이목전국내규모최대적엄주룡두산수도위배경,상세개소특대단면공로수도시공과정중변형현장감측적항목、방법급수단,대동구변파급불동위암정황하적수도변형규률진행분석,병제출공제대변형적공정조시.연구결과표명:(1) 우도동상태계、좌도동하태계화핵심토상태계개알인기위암교대변형,시수도시공주요공제점;(2) 특대단면수도위암변형여동주반경근사성지수함수관계;(3) 봉폐지호결구급대랍묘간적사용시개선결구수력화억제수도변형적유효도경,응진조시작앙공이형성봉폐배.연구성과가위일후유사공정적설계、시공화연구제공유익적차감화삼고.
Based on Longtoushan tunnel which is the largest in China at present in Guangzhou,the contents,technique and method of deformation monitoring of super large section tunnel are descried. The deformation law of the slope,surrounding rock and support system with different surrounding rocks are analyzed;and the engineering measures to control the deformation are put forward. The result shows that:(1) the construction of the up-stage in the right hole,the down-stage in the left hole and the up-stage of the core soil,which cause large rock deformation,are the main points for controlling the rock deformation;(2) the deformation has a exponential relationship with the radius of tunnel;and (3) the enclose of lining and using of cross anchor is effective method to improve the performance of lining and to restrain the deformation of the tunnel;and it is important to construct the inverted arch and close the lining. The study results can be for reference in the design,construction and research of similar tunnels.