CAJ | 학술논문

土质隧道围岩在工程实际施工中具有明显的弹塑性变形特征.通过运用FLAC3D软件,模拟隧道实际开挖过程,可得到隧道开挖过程中围岩应力分布及周边位移变化量,为隧道的施工提供预警信息和优化隧道设计提供理论支持.在控制地表变形方面,采用交叉中隔壁法(Cross diaphragm-CRD)施工时,地表最大沉降量为20.37 mm,而双侧壁导坑法则为25.8 mm,结果表明CRD法在控制围岩变形方面要优于双侧壁导坑法.因此,为了避免隧道在开挖过程中发生塌方等事故,应优先采用CRD法开挖.然而,运用FLAC3D软件模拟CRD法开挖过程,得到开挖隧道上部导洞所引起地表的沉降量占总沉降量的50%以上.因此,对CRD法上部导洞的开挖工序进行优化,能有效地降低塌方等事故发生的概率.
토질수도위암재공정실제시공중구유명현적탄소성변형특정.통과운용FLAC3D연건,모의수도실제개알과정,가득도수도개알과정중위암응력분포급주변위이변화량,위수도적시공제공예경신식화우화수도설계제공이론지지.재공제지표변형방면,채용교차중격벽법(Cross diaphragm-CRD)시공시,지표최대침강량위20.37 mm,이쌍측벽도갱법칙위25.8 mm,결과표명CRD법재공제위암변형방면요우우쌍측벽도갱법.인차,위료피면수도재개알과정중발생탑방등사고,응우선채용CRD법개알.연이,운용FLAC3D연건모의CRD법개알과정,득도개알수도상부도동소인기지표적침강량점총침강량적50%이상.인차,대CRD법상부도동적개알공서진행우화,능유효지강저탑방등사고발생적개솔.
During the process of using FLAC3D numerical simulation of the actual tunnel excavate process, it can be drawn rock stress distribution, surrounding the amount of displacement, for the tunnel construction to provide warning information and guidance, the theoretical support is provided to optimize the tunnel design. In the aspect of control surface deformation, the method of CRD maximum settlement amount is 20.37 mm when using CRD(Cross diaphragm) method to construct, while the method of double side is 25.8 mm, the result illustrate CRD method is superior to double side drift method in the aspect of control rock deformation. Therefore, in order to avoid the tunnel landslides and other accidents during excavation, CRD method should be considered preferentially than double side drift method. The process of using FLAC3D software to simulate CRD method excavation, the upper guide hole excavated tunnel surface subsidence is more than 50%of the total settlement amount. So it can effectively reduce the probability of collapse and other accidents by optimizing the excavation process of CRD method upper guide hole.