Debris flow convergence main river motion process experimental measurement system and calculation method

Abstract

The invention provides a debris flow convergence main river motion process experiment measurement system and a debris flow convergence main river motion process calculation method. Firstly a debris flow convergence main river motion process simulation experiment measurement system is provided and comprises a debris flow forming device, wherein an outlet of a branch ditch conveying groove is hinged to a main river water groove; a tailing pool device arranged at an outlet of the main river water tank; a measuring device, wherein image collectors are respectively arranged right above the main river water tank and right opposite to the outlet of the branch ditch conveying groove; second sensors arranged on the bottom surface of the main river water groove, and first sensors respectively arranged right above the second sensors; and a third sensor positioned above the tailing pool device. The invention further provides a method for measuring and calculating related evolution parameters in the movement process of the debris flow converging main river by utilizing the experimental system, momentum changes of the debris flow converging main river and the experimental system are calculated, and on-way evolution characteristics of mixed flow density, volume concentration, converging angle deflection rate and the like caused by mixing of water flow and the debris flow are calculated.

Description

technical field [0001] The invention relates to the field of mud-rock flow disasters, and is mainly applicable to the research on the movement of mud-rocks flowing into the main river, in particular to an experimental measurement system and calculation method for the movement process of the mud-rock flowing into the main river. Background technique [0002] Debris flow is a heterogeneous, non-constant, non-Newtonian fluid with high-intensity sand-transporting capacity and can carry a large amount of solid matter of mixed sizes. It flows into the main river and interacts with the incoming flow in the inflow area, rapidly changing the water-sediment composition and local boundary conditions of the main river, causing rapid changes in the riverbed landform in a short period of time, resulting in the elevation of the upstream riverbed and the gradient change of the downstream riverbed. Large, river meanders are intensified, which can easily cause disasters on different banks and...

AI Technical Summary

Problems solved by technology

So far, the research on the parameters of the debris flow into the main river has not studied the changes of these parameters, and then neglected the influence of the water flow on the movement of the debris flow during the flow into the sink, including the mixing effect of the debris flow and the water flow, and the transport effect of the water flow on the debris flow etc., and these phenomena often affect the accurate estimation of the time of debris inflow and confluence blocking the main river, the total amount of river blocking deposits, etc.

At present, the research on the movement of debris flowing into the main river is still at the stage of summarizing the experimental phenomena and making qualitative judgments. After the debris flows into the main river, the momentum changes of the two, the mixed flow density distribution caused by the mixing of water flow and debris flow, and The change of volume concentration and the deviation of water flow to debris flow are difficult problems that restrict the study of parameters along the process of debris inflow and confluence

Moreover, due to the sudden nature of the debris flow into the main river, the inflow process lasts for a short time, and the terrain conditions are complex, it is more difficult to measure the parameters of the debris flow and water flow intersection. Based on field phenomena, it is impossible to study the parameter evolution along the process of debris flow and influx.

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