欧洲杯直播

水泥注浆技术在隧道坍方处理施工的应用

 水泥注浆技术具有施工方法简单、方便、快速、有效等特点,同时具有凝胶时间可以调节、能控制浆液的扩散范围、固结强度高、结石率可达100%等优点。因此,在浅埋、软弱围岩隧道施工及隧道坍方处理中被广泛应用。考虑到坍方体具有强度低,灵敏度高,易产生蠕动现象,开挖后自稳能力差,地面沉降难以控制,严重时洞内可能再次发生坍方,扩大坍方长度,导致隧道施工困难加剧。为避免坍方加剧,施工中采用地面注浆、隧道内工作面注浆、隧道周边浅孔注浆等三种注浆方式相结合的施工方法,以保证坍方处理施工安全。
水泥注浆技术在隧道塌方施工上的应用

  一、地表注浆

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  二、隧道内工作面注浆

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  三、隧道周边浅孔注浆

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