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建筑场地往往狭小且变化快,导致施工前设置的已知点的通视性发生变化;同时,由于场地条件限制,难以找到一个同时与两个已知点都通视的点,导致无法采用后方交会法确定一个合适的临时工作基点来进行放样工作。本文提出了一种虚拟后方交会的方法,通过几何关系,确定了两个满足通视条件的临时基点的坐标值,进而指导施工放样。该方法可以利用常用的全站仪完成放样工作,工艺简单,为建筑密集区施工放样提供了一种新的选择。
Construction sites tend to be small and rapidly changing, leading to changes in the visibility of known points set prior to construction; at the same time, it is difficult to find a point that is visible to both known points at the same time because of site conditions, The rendezvous method identifies a suitable temporary basis point for stakeout. In this paper, a method of virtual rear intersection is proposed. Through the geometric relationship, two coordinate values of temporary base points that meet the viewing conditions are determined, which guides the construction of the stakeout. The method can complete the setting out work by using the commonly used total station, has simple process and provides a new choice for setting out construction in intensive areas.