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1.前言近年来,在临近市区街道和已有构造物附近,进行隧道开挖的机会日渐增加,但是,因爆破施工而出现的振动、噪声和飞石等问题,低振动爆破法或非爆破法的开发逐渐成为课题。对于这种要求,在这几年内发表了若干种非爆破开挖工作法、用液压向炮孔内压入楔子的液压楔入法、用冲击打入楔子的冲击楔入法、利用橡皮压缩而向侧面膨胀的方法等,施工实例也在增加。这些工作法基本的施工顺序是,首先在基岩上按适当的间隔钻孔,对于钻出的孔按上述方法进行加力,在基岩上形成张拉裂纹
1. Foreword In recent years, there is an increasing opportunity to excavate tunnels near urban streets and existing structures. However, vibration, noise and fly-stone problems due to blasting construction, low-vibration blasting methods, or non-vibrational blasting methods The development of blasting method has gradually become a subject. In response to this request, several non-blast excavation methods were published in the past few years. Hydraulic wedging of wedges with hydraulic pressure into the bores, impact wedging of wedges with impact, and rubber compression A method of expanding to the side, etc., and construction examples are also increasing. The basic construction sequence of these working methods is that firstly, holes are drilled at appropriate intervals on the bedrock, and the holes drilled are subjected to the above-mentioned methods to apply force to form tension cracks in the bedrock