【摘要】 南京九华山隧道工程,在城市中建设,周边环境要求高,穿越明代古城墙施工段面临如何确保古城墙安全的问题,是施工的难点之一。通过计算分析确定隧道开挖爆破震动对明古城墙的影响范围,详细介绍了控制围岩沉降、控制爆破振动效应等确保古城墙安全所采用的技术措施;通过所进行的监测工作,证明了所采用技术措施的有效性。对城市隧道工程建设中的环境保护问题具有重要的应用价值。更多还原

【Abstract】 Big-double-arch structure form is used in Nanjing Jiuhuashan Tunnel.The pruject features big fly-past,complex geology and higher demand on environment protection that make it very representative in double-arch tunnels. In order to protect the ancient city-wall where the tunnel passes through,it is necessary to estimate the safety of the ancient city wall under the influence of blasting of tunnel excavation.Several popular vibration velocity and vibration frequency formula are used to calculate the extent and range of the influence of blasting of tunnel excavation on ancient city wall.Several technological methods are in detail introduced.The methods are testified effectivey through monitoring work.更多还原