CAJ | 학술논문

随着我国高速公路的发展，在岩溶地区修建隧道工程日益增多，选择合理施工工法是隧道施工安全稳定的重要一环。根据大跨度岩溶隧道中溶腔的发育程度、发育位置以及溶腔内充填物性质的不同，隧道需采用不同施工工法。以乐昌至广州高速公路段某大跨度岩溶隧道为例，采用有限元软件对其进行了三台阶法、单侧壁导坑法和双侧壁导坑法等3种施工工法的比选。最后得出结论：双侧壁导坑法在岩溶隧道施工中能有效的控制围岩塑性区的发展和洞周位移，并且能够有效改善围岩的受力状态，适当提高衬砌的应力水平，是较为合理的施工工法。可为岩溶地区高速公路隧道设计施工提供一定的参考。
수착아국고속공로적발전，재암용지구수건수도공정일익증다，선택합리시공공법시수도시공안전은정적중요일배。근거대과도암용수도중용강적발육정도、발육위치이급용강내충전물성질적불동，수도수채용불동시공공법。이악창지엄주고속공로단모대과도암용수도위례，채용유한원연건대기진행료삼태계법、단측벽도갱법화쌍측벽도갱법등3충시공공법적비선。최후득출결론：쌍측벽도갱법재암용수도시공중능유효적공제위암소성구적발전화동주위이，병차능구유효개선위암적수력상태，괄당제고츤체적응력수평，시교위합리적시공공법。가위암용지구고속공로수도설계시공제공일정적삼고。
There are more and more Karst tunnels to be constructed in our country,the construc-tion methods of Karst tunnel are also increasingly diverse.Choosing reasonable construction method is one of the most important aspects of security.Different construction methods should be used depending on location ,degree and the property of the fillers of the longspan karst cavity.In background of a certain Karst tunnel in the expressway from Lechang to Guangzhou,the author simulated three construction meth-ods:the three steps method,single-side-drift method and double-side-drift method using the finite ele-ment software Abaqus,and analysed the formation and development of the plastic zone and the displace-ment of the surrounding rock,and come to the conclusion:double-side-drift method can not only control the development of the plastic zone and the displacement of the surrounding rocks,but also can can effec-tively improve the stress of surrounding rock,appropriately raise the level of stress of the lining.It is the proper construction method for Cavity Karst Tunnel.The conclusion provide reference for tunnel construc-tion under similar conditions.