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某港口有一段钢筋混凝土的护岸防浪墙需要拆除,墙高2.9米,长150米,平均厚度0.45米。在防浪墙背后有一排9根输送易燃液体的管道,不宜采用通常的炸药爆破方法拆除,为此采用了无声破碎方法进行拆除。根据护岸防浪墙伸缩缝间距为15米的条件,选择其中一段进行拆除试验。首先在墙根部钻一排钻孔(顺墙根水平方向),钻孔与地面呈65°角,使用22型风动钻机,φ42一字合金钻头,孔深50厘米,孔距60厘米,钻孔直径为4.5厘米。将SCA粉剂(即无声破碎剂)加水,配成浆液,加水量为粉剂重量的
There is a section of reinforced concrete anti-wave wall in a port that needs to be dismantled. The wall is 2.9 meters high, 150 meters long, and the average thickness is 0.45 meters. There is a row of nine pipelines conveying flammable liquids behind the wave wall, which should not be removed by the usual explosive blasting method. For this reason, a soundless crushing method was used for demolition. According to the condition that the distance between the expansion joints of the bank wall is 15 meters, one of them is selected for the dismantling test. First drill a row of holes in the base of the wall (horizontal direction along the wall), drill holes at an angle of 65° to the ground, use a 22-type pneumatic drill, φ42 alloy drill, hole depth of 50 cm, hole spacing of 60 cm, drilling The diameter is 4.5 cm. The SCA powder (ie, the silent breaker) is added with water to form a slurry. The amount of water added is the weight of the powder.