岩土工程中位移监测方法及精度分析

Displacement Monitoring Methods in Geotechnical Engineering and Accuracy Analysis

在岩土工程位移监测中,选择哪种方法取决于监测时的条件;本文对监测中常用的测小角法、角度前方交会方法、距离前方交会方法、全站仪后方交会及极坐标综合方法等各种方法进行了研究。在目前各种文献中,一般都只是给出了监测点坐标的计算方法,充其量还给出监测点沿坐标轴方向的中误差以及点位中误差,而监测点其它方向的误差情况则无从计算。基于此,本文对以上各种监测方法的误差椭圆进行了推导,从而可以计算监测点沿各个方向误差并估算精度。

In the geotechnical engineering displacement monitoring, the choice of methods in monitoring depends on the condition monitoring. This paper used in the small Angle measurement method, angular intersection method, distance intersecting method, Total synthesis methods are studied. At present various documents, usually the coordinates calculation method are only gives. At best mean square error and mean square error of points in the direction of the coordinate. But mean square error in other direction is imponderable. Based on the above all sorts of monitoring method is deduced error ellipse, which can calculate the mean square error of monitoring points along each direction and estimate accuracy.