水电能源科学

雨水口作为城市道路排水系统的关键组成部分，一旦发生堵塞将会影响管网排水能力，从而引发城市内涝等一系列问题，因此研究雨水篦子堵塞对泄流影响至关重要。雨水篦子堵塞和支管堵塞是雨水口堵塞的两种主要形式，研究考虑雨水篦子堵塞、支管堵塞及两种堵塞共存三种情形，设计了16种不同的工况开展物理模型试验。根据试验结果可得，相同堵塞程度下，支管堵塞对泄流量及泄流系数的影响更大；结合试验结果利用雨水口泄流能力公式计算出不同堵塞情况下的综合泄流系数C_n,并利用最小二乘法得到雨水口堵塞程度与泄流系数的经验关系式。

As a crucial component of the urban road drainage system, the clogging of rainwater gratings can impair the drainage capacity of the pipeline network, leading to a series of issues such as urban waterlogging. Therefore, studying the impact of rainwater grating clogging on discharge is of vital importance. There are two main forms of rainwater grating clogging: clogging at the grating itself and clogging in the branch pipes. This study considers three scenarios: grating clogging, branch pipe clogging, and the coexistence of both types of clogging. A total of 16 different working conditions are designed to conduct physical model experiments. The experimental results indicate that under the same degree of clogging, branch pipe clogging has a greater impact on the discharge flow rate and discharge coefficient; Based on the experimental results, the formula for the discharge capacity of rainwater gratings is used to calculate the comprehensive discharge coefficient C_n under different clogging conditions. The empirical relationship between the degree of rainwater grating clogging and the discharge coefficient is obtained using the least squares method.