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一直孔钻塔安装距的求定(一)大穿钉式三、四脚木质直钻塔直孔安装距的求定三脚木质直塔打直孔时,一般单腿在孔前,双腿在孔后.单腿支点与孔位距离为前、后塔脚距离的2/3.两塔腿中点与孔位的距离为前后塔腿之间距离的1/3,即孔位与三个塔腿地面支点距离相等,三个支点联线即成等边三角形.四脚木质直塔打直孔时,孔位在四脚支点正方形的中心点.1.作图法:
Has been drilling holes to determine the installation distance (a) wearing nail-type three or four-foot straight wooden hole straight hole installation distance to determine the three-legged wooden straight hole straight hole, the general single leg in front of the legs in the After the hole, the distance between the fulcrum of the single leg and the hole is 2/3 of the distance between the front and the rear of the tower, the distance between the midpoint of the two towers and the hole is 1/3 of the distance between the legs of the front and the back, Tower legs on the ground fulcrum distance equal, the three fulcrum connection is equilateral triangle .Four wooden straight tower straight hole, the hole in the four-legged fulcrum square center .1 mapping method: