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以灯草塘隧道双连拱隧道为例,结合地质条件差、埋深浅、跨度大的特点,提出了适合于本标段连拱隧道特点的隧道监控量测内容,以及相应的量测要求,获得了隧道各施工阶段的地表沉降、拱顶下沉和周边收敛、钢支撑内力和围岩压力等数据资料,有效地控制了隧道围岩变形,经实践检验监控量测确实起到指导现场设计与施工的作用,为隧道的施工安全和施工质量提供了有力的保证。
Taking the double-arch tunnel of Lancaotang tunnel as an example, the tunnel monitoring and measuring content suitable for the characteristics of the arch tunnel in this archipelagos and the corresponding measurement requirements are proposed according to the characteristics of poor geological conditions, shallow depth and large span. The data of surface subsidence, dome subsidence and surrounding convergence, internal force of steel support and pressure of surrounding rock in tunnel construction stage effectively control the deformation of surrounding rock of tunnel. The practice of monitoring and measuring can really guide the design of site The role of construction, tunnel construction safety and quality of construction provided a powerful guarantee.