水电站尾水河道疏浚开挖的研究

通过对某水电站尾水河道疏挖水力学计算和水下开挖方案的研究,提出了水电站尾水疏挖的推荐方案和施工方法。通过尾水疏挖后,电站可增发电量0.8亿kWh,经济效益十分显著。尾水疏挖是充分开发利用河段水力资源、水电站增发电量的有效途径,在工程实践中应加以推广应用。     

变顶高层水洞水电站机组运行稳定性研究

本文在水轮机调节系统基本方程的基础上,引入了变顶高尾水洞明满分界面处水体来回运动的连续性方程,利用MATLAB中的仿真计算软件,研究分析了变顶高尾水洞水电站机组运行的稳定性,为变顶高导水洞技术的推广应用,提供可靠的理论依据。     

A new model for TBM performance prediction in blocky rock conditions

The term “blocky rock conditions” is generally associated with face instabilities in blocky/jointed rock masses. These events are generally promoted by unfavorable rock mass structural conditions, in terms of joint frequency and orientation, and acting stresses. As a result, rock blocks are formed and then detach from the excavation face which becomes “blocky”, with a markedly irregular and uneven profile. This condition may have a paramount effect on TBM tunneling, leading to a high maintenance frequency and a low TBM advancement rate. Based on the TBM performance data recorded during excavation of tunnels in blocky rock conditions, a TBM performance prediction model has been developed. The model is based on the Field Penetration Index for blocky rock conditions, FPI_blocky, which was previously introduced to analyze the TBM performance in blocky grounds at the Lötschberg Base Tunnel. Through a multivariate regression analysis, a new expression has been introduced to predict the FPI_blocky based on the volumetric joint count (J_v) and the intact rock uniaxial compressive strength (UCS). An attempt has also been made to quantify the downtimes that may occur in blocky rock conditions and to estimate a reliable value of TBM daily advance.     

水电站下游河道变形的模型试验方法探讨

本文首先讲述水电站下游河道变形水工模型试验方法，其次讨论在一个模型上既做定床试验又做动床试验的可能性，对洪水冲刷河道达到变形稳定的试验方法，并用数值计算方法做了补充。     

基于虚拟仪器技术的变顶高尾水洞大型水电站模型试验系统

通过对变顶高尾水洞大型水电站模型试验的分析,设计了一种用虚拟仪器技术,实现在线数据采集、数据分析和控制的方法.实践证明,该方法可满足变顶高尾水洞大型水电站模型试验的任务多样化的要求,具有投资少、精度高、可靠性好、灵活和开放等优点.     

边界拟合坐标法在尾水河道计算中的应用及其验证

本文讲述应用边界拟合坐标法计算柘溪与丰满水电站尾水河道流场。同时进行了水工模型试验进行验证核对两者吻合很好。说明边界拟合坐标法精度较高，可满足尾水河道清理工程方案选择需要