一、前言目前我国常用的拱坝施工放样测量方法有:偏角法,弦线延长法,弦线中点法,等长弦线法,直角座标法,内切外接圆弧法,直接画弧法,内外矢矩法等等。这些方法的共同特点是:只叙述如何将拱圈圆弧放样子实地上,而未考虑由于放样误差所引起的拱坝弧的改变而造成设计应力方向的改变,以致给大坝安全带来不利的影响。作者针对此问题提出一些改进意见,重点推荐交会方法,供大家研讨。 I. Preface At present, the commonly used method of setting out the survey of arch dam in our country includes: declination method, chord extension method, chord center point method, long chord method, rectangular coordinate method, inscribed arc method, direct painting Arc method, inside and outside the moment method and so on. The common features of these methods are: only describes how to make the circular arch of arc arch on the ground without considering the change of design stress direction caused by the change of arc of arch dam caused by the staking error, which brings adverse to dam safety Impact. The author puts forward some suggestions for improvement on this issue, focusing on the method of rendezvous for your discussion.