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四臂液压台车使用两年多来,在钻孔作业中,由于液压臂自动平移机构满足不了隧道开挖超欠控制要求,钻臂推进器的水平,平行的初始位置是由人工目测的,据测新液压臂平行,水平与垂直移动误差约在10%左右,再加各部分的自然磨损,因此,隧道开挖轮廓难以控制,造成隧道开挖超欠严重,直接影响隧道开挖质量,掘进进度。边墙、拱部
Four-arm hydraulic trolley to use more than two years, in the drilling operation, due to the hydraulic arm automatic translation mechanism can not meet the tunneling over owed control requirements, the level of the boom, the parallel initial position is manually visual inspection, It is estimated that the new hydraulic arm parallel to the horizontal and vertical movement of about 10% error, coupled with the natural wear and tear of various parts of the tunnel excavation profile is difficult to control, resulting in over-under-serious tunnel excavation, a direct impact on the quality of tunnel excavation, Driving progress. Side walls, arch