Compound rectangular flow weir for monitoring water flow of montane stream

Abstract

The invention discloses a compound rectangular flow weir for monitoring water flow of a montane stream. The compound rectangular flow weir comprises a left side weir body, a compound rectangular weir,a right side weir body, a substrate, and a water level monitoring device hole, wherein the left side weir body, the right side weir body and the substrate form the compound rectangular weir; the compound rectangular weir comprises a first layer of thin-wall weir and a second layer of brickwork weir; the water level monitoring device hole is located in a riverbed at the upstream of the flow weir to fix a water level monitoring device. The first layer of thin-wall weir is used for monitoring low flow of streams in mountains and tunnels; the second layer of brickwork weir is built by bricks withcement and is used for monitoring high flow in a flood season. The whole compound thin-wall weir obtains flow data calculated by adopting water level measurement, and no manual monitoring is needed,so that the labor cost is greatly reduced. The scientific rationality and the flow monitoring accuracy of the flow weir are improved; the flow and a changing rule of gulley water are precisely monitored; scientific and accurate hydrogeological data is provided for mountain engineering construction.

Description

technical field [0001] The invention relates to the technical field of hydraulic flow measurement, in particular to a compound rectangular flow weir for monitoring the water flow of river ditches in mountainous areas. Background technique [0002] In recent years, with the construction of high-speed railways and highway tunnels in mountainous areas, in order to prevent major water inrush accidents during the construction of tunnels, it is necessary to carry out special projects on mountainous tunnel engineering surveys, especially hydrogeology in karst areas. It is especially important to monitor groundwater and surface water in small watersheds in mountainous areas where tunnels pass through. At present, the flow measurement methods of surface and underground ditches in mountainous areas in the field, such as sounding rods, flow meters, or visual measurement combined with estimated flow, have poor accuracy and cannot meet the requirements of relevant monitoring work. There ...

AI Technical Summary

Problems solved by technology

At present, the flow measurement methods of surface and underground ditches in mountainous areas in the field, such as sounding rods, flow meters, or visual measurement combined with estimated flow, have poor accuracy and cannot meet the requirements of relevant monitoring work. There are also some indoor flow weirs (such as triangular weirs, rectangular weirs, etc.) The structure of the weir) is relatively simple, and the change of water level and flow in the dry season or flood season cannot be accurately measured, and reliable hydrogeological data cannot be provided for engineering construction in mountainous areas.

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