盾构到达突发涌水处理及水中到达方案分析

盾构到达时易出现涌水、涌砂、上覆土体坍塌等事故，是盾构施工的重大风险点之一。通过盾构到达突发涌水事故解决实例，介绍事故发生后采用钢筋混凝土接收洞室进行盾构水中到达的施工经验。钢筋混凝土接收洞室基于平衡到达理念，采用密闭的箱型混凝土结构与隧道洞门密闭连接，并在箱体内灌入填充物，以达到与土层压力平衡，模拟盾构在土体中的掘进状态，使盾构安全进入接收洞室内。

Coping with Water Gushing in Shield Arrival

Water gushing, sand inrush and collapse are prone to occur in shield arrival, which is one of the major risks in shield tunneling. Water gushing occurs in the shield arrival in a tunneling project. In order to cope with the gushing water, a shield receiving chamber made of reinforced concrete is built. The shield receiving method mentioned is mainly based on the idea of keeping balance in shield arriving. The shield receiving chamber made of reinforced concrete is closely connected to the tunnel portal and is filled with filling materials to keep the pressure in the chamber equal to the original soil pressure so as to simulate the shield tunneling conditions in the original soil and to ensure the safety during shield arrival.