“中导洞”法施工双连拱隧道的数值模拟分析

Numerical Simulation of "Central Pilot Heading" in Double-Arched Tunnel Construction

以高速公路双连拱隧道工程为例,以围岩稳定性评价为主线,以保证围岩稳定和指导施工为目的,运用FLAC3D软件对隧道"中导洞"法施工过程进行数值模拟。对施工和运行期间的整体稳定性进行了分析,提出了相应的工程措施。结合现场监测数据验证了模拟结果,为港口连拱隧道施工提供了有效指导。

To take a double-arched tunnel construction in expressway engineering as an example,surrounding rock stability estimation as the essential,the authors have carried out numerical simulation of 'central pilot heading' in double-arched tunnel construction process by the use of FLAC3D software in order to organize surrounding rock stable purposed construction steering.Analyzed overall stability during construction and service processes,put forward corresponding engineering measures need to be adopted.The simulation results were justified through site monitoring,thus effectively directed multiple-arched tunneling in port construction.