今年4月,我局在开封段召开座谈会,交流了在船上以钢管、钢锥探摸根石的经验。兹将各段目前使用的探摸方法作以下介绍。一、设立断面桩在探摸根石之前,首先在坝的中心或偏中心定出一条基线,从基线上伸出各断面桩。断面线应垂直于坝坦坡,断面桩要从上到下统一编号,并将基线桩和断面桩的位置绘在平面图上,同时注明桩与桩之间的距离和角度,以便在平面上分析水下根石情况,和备 In April this year, our bureau held a symposium in Kaifeng section to exchange experience of exploring the root stone with steel pipes and steel cones on board. The methods of exploration currently used in each paragraph are hereby introduced as follows. First, the establishment of sections of the pile in the exploration of roots before, first in the center of the dam or center set a baseline, each section of the pile from the baseline. Section line should be perpendicular to the dam slope, section of the pile from top to bottom uniform number, and the baseline pile and section pile position plotted on the plan, while indicating the distance between pile and pile angle and angle, so that in the plane Analysis of underwater conditions, and preparation