城市浅埋暗挖通道施工的地表及管线沉降控制

The control of pipe settlement and surface displacement during the construction of shallowly buried and darkly excavated tunnel in city

结合杭州地铁1号线凤起路站第八号出入口过街通道施工实例,为保证地面及管线沉降控制在允许范围之内,采用地面垂直加固,洞内超前注浆,大管棚超前支护等多种控制措施,施工后的监测数据表明采取以上措施控制沉降效果显著,为城市复杂环境中采用CRD法施工的浅埋暗挖通道提供了可靠的指导措施。

Combining with the construction example of the passage over street of No.8 entrance and exit alogn Fengqi road No.1 subway in Hangzhou,in order to control the pipe settlement and surface displacement within a permissible range,using the foundation reinforcement technology,the advanced cement grout injection technology and the large-scale lead pipe grouting technology and so on.The measuring data showed that the technology obtained marked effect during construction and surface displacement meets the demand of the city environment.It provided dependable measures of CRD construction method of shallowly buried and darkly excavated tunnel in city with a complicated environments.