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一、关于桩位中心的标志桩问题根据桩位图定位放桩后,施工单位大都采用木桩或钢筋作标志桩,如果桩头稍微露出地面,就会受现场机械器材的冲撞而活动,或者被施工现场内的车辆车轮压人土中;如果桩头与地面一平,就会沾上污泥而认不出来,所以,经常需要重新复核桩中心位置,为了消除这个时间上的浪费,使用图1所示的桩位中心标志桩,效果很好。二、关于测量用重锤问题孔底清孔处理后,为了测量孔底深度和沉淀泥渣厚度,一般采用“重锤法”来验证(见图2左),但是,由于这种重锤测量接触表面小,因此测量沉淀泥渣时重锤头部陷入泥渣中,给实际测量精度带来问题,影响桩的承载
1. Marking piles at the center of piles After positioning piles according to the pile pattern, most construction units use wooden piles or steel as the sign piles. If the pile heads are slightly exposed on the ground, they will be subject to the impact of on-site machinery and equipment, or The vehicle wheel in the construction site is pressed into the soil; if the pile head is level with the ground, it will be contaminated with sludge and cannot be recognized. Therefore, it is often necessary to recheck the central position of the pile. To eliminate this time waste, use the map. The pile center mark pile shown in Fig. 1 works well. Second, on the measurement of heavy hammer problems Hole bottom hole cleaning treatment, in order to measure the depth of the bottom of the hole and sediment sludge thickness, the general use of “heavy hammer method” to verify (see Figure 2 left), but because of this weight measurement The contact surface is small, so when measuring the sediment sludge, the head of the heavy hammer is trapped in the sludge, which brings problems to the actual measurement accuracy and affects the bearing capacity of the pile.