基于FLOW-3D软件的水文站井筒基础水流力数值模拟研究

Numerical Simulation Research on Flow Force of Shaft-type Foundation of Hydrological Station Based on Flow-3D Software

摘要:

水文测站为水利工程中用来观测水位、流量等水情的水利设施。由于其特殊的作用，一般采用井筒式基础布置在河道岸边。在河道流速较大、水深较深的地方，井筒基础所受的水流力将成为结构控制可变荷载。对于此种水流力的计算有相应规范作为参考，但这些规范均未考虑水面壅高的影响，从而使得水流力计算值偏小，不利于结构安全。为此，基于Flow-3D软件，对井筒基础所受的水流力进行数值模拟计算，根据计算结果进一步分析研究水流力与结构尺度、流速及水深的相对关系，并提出建议的计算方法。

Abstract:

Hydrological stations are the water conservancy facilities used in hydraulic engineering to observe the water conditions such as water level and flow rate. Due to the special role, the shaft-type foundation is generally arranged on the riverbank. In areas where the river flow velocity is high and the water depth is deep, the water flow force acting on the shaft-type foundation will become the variable load controlled by the structure. There are corresponding norms for the calculation of this kind of water flow force as a reference, but these norms do not consider the impact of water surface elevation, which makes the calculated value of the water flow force too small, and is not conducive to structural safety. Therefore, based on Flow-3D software, the water flow force acting on the shaft-type foundation is numerically simulated and calculated. Based on the calculation results, the further analysis and research are conducted on the relative relationship between the water flow force and structural scale, the flow velocity and water depth, and a recommended calculation method is proposed