It briefly describes the working principle of stepping motor based upon the gate tests at the intake tunnel for Laxiwa hydropower project.

以拉西瓦水电站进水口快速闸门模型试验为例，简要阐述了步进电机的工作原理。

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Through the experimental research, the rationality of setting up the sediment flushing tunnel before the intake is ascertained, and a detail scheme for the reservoir control is made up.

通过模型试验研究，肯定了拉沙洞前置的合理性；确定了水库调度的具体方案；并由右岸拉沙底孔的拉沙效果提出加设机组的构想。

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For the high slope of intake of diversion tunnel of Zipingpu Irrigation Project, the relationships of stress and strain are calculated by traditional mechanical methods of unloading and loading.

采用传统的加载力学方法和卸荷力学方法，利用数值计算对紫坪铺水利工程引水发电隧洞进口高边坡开挖后的应力-应变进行了研究。

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