论文部分内容阅读
由于冲刷和淤积引起的结构物和航运安全问题,水下泥面的冲淤监测已经成为结构健康监测中的一项重要的任务。本文对基于侧向土压力测量确定水下冲淤深度的方法进行可行性研究。该方法利用以光纤光栅作为传感元件的传感器,正面承受水土压力,背面承受水压力,通过测量正面和背面的压力差可以精确测量侧向土压力;由于水体中水平方向压力只有水压力,土体中水平方向压力由侧向土压力和孔隙水压力组成,因此通过若干只不同深度位置的传感器,计算出冲淤深度。该方法能实现水工结构的冲淤情况实时反馈,为水工结构安全运行提供可靠的数据支持。
Scouring and silting monitoring of underwater mud surfaces has become an important task in structural health monitoring due to structural and shipping safety problems caused by erosion and siltation. In this paper, the feasibility of determining the depth of submerged scour and silting based on lateral earth pressure measurement is studied. The method uses fiber grating as the sensing element sensor, the front to withstand water and soil pressure, the back to withstand water pressure, by measuring the pressure difference between the front and back side can accurately measure the lateral earth pressure; as the water pressure in the horizontal direction only water pressure, soil The horizontal pressure in the body is composed of lateral earth pressure and pore water pressure. Therefore, the depth of scouring and silting is calculated by several sensors with different depth positions. The method can realize real-time feedback on the scouring and silting situation of the hydraulic structure and provide reliable data support for the safe operation of the hydraulic structure.