地铁盾构区间下穿机场跑道的影响控制

Influence Control of Subway Shield Driving through Airport Runway

为适应城市的发展需要和满足城市居民日益增长的出行需求,城市地铁甚至需要下穿机场飞行区。通过对某市区间盾构下穿机场跑道进行研究,建立MIDAS三维计算模型,分析并进行计算盾构施工后引起的地面沉降,从而确保区间盾构施工期机场跑道的安全运行。在中风化石灰岩等较好岩层中,且隧道埋深较深(大于等于18 m)时,区间盾构施工对地表沉降影响较小。

In recent years,with the rapid development of Urban Rail traffic,China has been paying more and more attention to the subway construction project. However,the subway tunnel construction will inevitably cause great disturbance to the ground,it is even more difficult and challenging when it come across an airport runway. In order to meet the development needs of the city and the growing needs of urban residents travel,urban subway may need to come across the airport flight area. By analyzing subway shield Driving through airport runway in an urban area,a MIDAS 3D calculation model is developed to analyze and calculate the ground subsidence caused by shield construction,which is ensuring the safe operation of airport runway during the interval shield construction. When the tunnel depth is deeper（ greater than or equal to 18 m） and in the well rock strata or other well strata,the shield construction has little effect on the surface subsidence.