克孜河渡槽充水载荷试验及结构承载能力评价

为了评价克孜河渡槽结构的承载能力，需开展充水载荷试验。通过实时监测试验加载过程中各梁跨的跨中挠度值和卸载后残余挠度值，分析加载过程中挠度值随荷载的变化规律，确定加载级别与稳荷时间，判断渡槽结构在各级荷载下的工作状态，并引入结构承载能力评价指标结合监测结果对结构承载能力进行评价。结果表明：充水载荷试验分6级进行，稳荷时间30 min即可满足试验要求；结构各梁跨的实测挠度随水荷载增加而增大，在满槽水位时达到最大值，纵梁、左边梁和右边梁最大实测挠度分别为3.40、2.53和2.35 mm，且各级荷载下实测挠度与荷载呈显著的线性关系，线性相关系数均在0.95以上，结构处于线弹性工作状态；结构承载能力评价指标挠度极值、相对残余挠度和挠度校验系数均小于规范限值，并通过与同类工程对比，综合反映出克孜河渡槽结构具有较好的承载能力。

Water filled loading test and evaluation of structural bearing capacity of the Kezihe River aqueduct

In order to evaluate the bearing capacity of the Kezihe River aqueduct structure, Water filled loading test was carried out. Based on the real time monitoring of the deflection value in the midspan of the loading process and the residual deflection value after unloading, the variation of the deflection value with the upgrading of the load in the loading process was analyzed, the loading level and the load stabilization time was determined, the working state of the structure under different loads was clarified, and the structural bearing capacity was evaluated using structural bearing capacity evaluation indices. The results show that the water filled loading test was carried out in six stages, and 30 min of load stabilization time would suffice according to the test requirements. The measured deflection value of each beam rose with the increase of the load and reached the maximum value of 3.40 mm (longitudinal beam), 2.53 mm (left beam) and 2.35 mm (right beam) when the aqueduct was at full water level. The measured deflection had a significant linear relationship with the load at all stages, with the linear correlation coefficient reaching 95% or above, indicating that the structure was in a linear elastic working state. The values of the maximum deflection, relative residual deflection and deflection calibration coefficient of the structural bearing capacity evaluation indices were all lower than the specified maximum values in the specification. Compared with similar projects, the Kezihe River aqueduct structure has good bearing capacity.