论文部分内容阅读
在大量的野外和模型试验的基础上，阐述了桥上测流（以下简称桥测）断面位置的选择方法、桥墩对水流的影响程度及断面垂线的布设方法，并对桥测的精度进行了分析研究。结果表明，桥测断面应布设在桥体上游并且离桥墩３ｍ以外处，断面垂线应以桥孔中央线对称布设为佳，垂线布点以二点法（０２，０８）较好。桥测流量与船（缆）测流量对比，误差在５％之内。由此可见，桥测可以作为流量测验的的常规方法之一。
On the basis of a large number of field and model tests, the method of selecting the location of cross-section flow measurement (hereinafter referred to as bridge measurement), the influence degree of pier on water flow and the laying method of section vertical line are described, and the accuracy of bridge measurement Analytical research. The results show that the bridge cross section should be located upstream of the bridge body and 3 m away from the pier. The vertical line of the cross section should be symmetrically arranged along the central line of the bridge hole, and the vertical distribution point should be better with the two-point method (02, 08) . Bridge measured flow and ship (cable) measured flow comparison, the error is within 5%. Thus, bridge test can be used as one of the conventional methods of flow test.