浅析距离交会归化法定位精度

距离交会法广泛应用于工程放样中,按照施工放样条件选择对应的归化方式可有效提高点位精度,进行距离交会时,以两已知点为圆心按照各自半径做圆相交,初步确定放样点位,由于测量工作不可避免误差,因此所得点位与绝对位置存在横向和纵向的偏移量,对此应按交会角范围选择归化方式,处理时以同三角形中角度和边长关系引入交会角,选择按偏移量平行或垂直于偏移量所得两个交点分别进行归化讨论,得出准确放样点位。若在距离交会放样时判断交会角范围并选择对应归化方式可有效提高放样点位精度。

Distance intersection method is widely appl ied in the project lof ting,according to the conditions of construction lof ting choose corresponding naturalized way can ef fectively improve the positional accuracy,distance intersection,with two known points as the center of the circle radius of respective do circular intersection,preliminary determine lofting point,due to the measurement error is inevitable,so the income level of horizontal and vertical offset with absolute position,this should choose naturalized way according to the intersection Angle range,processing with triangle Angle and side length relationship into the intersection Angle,choose according to the offset parallel or perpendicular to offset the two intersection naturalization discussed respectively,precise lofting points are obtained.If the range of intersection Angle is determined and the corresponding domestication method is chosen during the distance from the intersection lofting,the lofting point position accuracy can be effectively improved.