CAJ | 학술논문

近接隧道等地下结构由于其空间位置及多条隧道的特殊性，在工程开挖时，影响工程建设的因素比单一洞室和独立结构施工时多，这些额外的影响因素会引起周围岩体应力重分布甚至再次重分布，导致围岩和结构一系列的力学行为变化。交叉隧道是近接隧道中的一种，施工时，其加载、卸载效应，横向、纵向及空间效应等会因隧道开挖的时间先后、空间位置及开挖方式的不同而不同。本文依托广州地铁5号线与6号线交叉段近接施工工程，通过ABAQUS三维建模，对5号线上跨6号线方案进行研究，通过分析发现，既有结构物6号线隧道在新建5号线隧道施工完成后，其永久初期支护内力并未因新建5号线隧道的影响而显著增大，相比，地表沉降的变化要大得多。对此，本文通过比较其相互间内力、变形的影响关系，为实际工作中优化设计方案、选择合理施工顺序提供理论依据。
근접수도등지하결구유우기공간위치급다조수도적특수성，재공정개알시，영향공정건설적인소비단일동실화독립결구시공시다，저사액외적영향인소회인기주위암체응력중분포심지재차중분포，도치위암화결구일계렬적역학행위변화。교차수도시근접수도중적일충，시공시，기가재、사재효응，횡향、종향급공간효응등회인수도개알적시간선후、공간위치급개알방식적불동이불동。본문의탁엄주지철5호선여6호선교차단근접시공공정，통과ABAQUS삼유건모，대5호선상과6호선방안진행연구，통과분석발현，기유결구물6호선수도재신건5호선수도시공완성후，기영구초기지호내력병미인신건5호선수도적영향이현저증대，상비，지표침강적변화요대득다。대차，본문통과비교기상호간내력、변형적영향관계，위실제공작중우화설계방안、선택합리시공순서제공이론의거。
Due to the special spatial relationship and multi-tube characteristics of neighboring tunnels,the construction of neighboring tunnels can cause the re-distribution of the stress of the surrounding rocks of the tunnels,which may lead to a series of mechanical behavior variation.Crossing tunnels belongs to neighboring tunnels.During the construction of crossing tunnels,the loading and unloading effect and the horizontal,vertical and spatial effect vary depending on the spatial location,excavation sequence and excavation method of the crossing tunnels.This article relies on the construc-tion of the tunnel section where Line 5 of Guangzhou Metro crosses above Line 6,so as to make study on the construction of the tunnel section of Line 5 crossing Line 6,with three-dimensional modeling via ABAQUS.This analysis reveals that the internal forces of the permanent support of tunnel of Line 6 is not so much affected by the construction of the tunnel of Line 5 ,while the ground surface settlement is relatively seriously affected by the construction of the tunnel of Line 5 . This paper compares the mutual influence relationships of internal forces and deformation between Line 5 and Line 6,so as to provide a theoretical basis to optimize the design scheme and to choose reasonable construction sequence in practi-cal work.