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我队在梧州市桂江二桥二号桥墩上,钻了8个Φ1200mm深8米的嵌岩桥墩加固钻孔,共计进尺64.62米。纯钻时间685小时,平均每小时进尺0.094米/时。其中合金全面钻头钻进0.48米,纯钻时间33.30小时,小时进尺0.014米/时;合金环状钻头钻进4.54米,纯钻时间52.40小时,小时进尺0.09米/时;钢粒取心钻头钻进27.71米,纯钻时间230.50小时,小时进尺0.12米/时(最高为0.39米/时,最低为0.10米/时);钢粒全面钻头钻进
My team in Wuzhou Second Bridge Pier on the 2nd, drilled 8 Φ1200mm deep 8 meters of rock-pier reinforced drilling, a total footage of 64.62 meters. Drilling time 685 hours, the average hourly footage 0.094 meters / hour. Among them, the all-round alloy drill drilled 0.48 meters, the pure diamond time was 33.30 hours and the hour footage was 0.014 meters / hour; the alloy annular drill bit was 4.54 meters, the pure drilling time was 52.40 hours and the hour footage was 0.09 meters / hour; Into 27.71 meters, pure drilling time of 230.50 hours, hours into the ruler 0.12 m / h (up to 0.39 m / h, a minimum of 0.10 m / h); full drill bit drilling