A method for safety analysis and bank slope stability judgment of river dangerous engineering scour

Abstract

The invention discloses a method for safety analysis of river dangerous construction scour and bank slope stability determination. Step 1: generate a data set as a two-dimensional river water / sand model; step 2: set the model calculation according to the parameters of the river section in the research area Parameters and definite solution conditions, build a two-dimensional water / sand numerical simulation model in the study area; Step 3, set a variety of working conditions according to the incoming sediment under different flood conditions, and use the two-dimensional water / sand numerical model to analyze the water flow in the study area. Carry out simulation of sand transport and riverbed erosion and siltation, analyze the dangerous riverbed before and after the flood based on the simulation results, and calculate the scour-depth distance of the riverbed on the dangerous slope and the lateral erosion distance of the river; step 4: construct the seepage-stability analysis of the dangerous slope The finite element model is used to quantitatively study the relationship between various factors and the safety factor of bank slope stability. The invention studies the stability of the dangerous bank slope of the river course under the action of water scour, and provides a quantitative means for evaluating the stability of the dangerous bank slope.

Description

technical field [0001] The invention relates to the technical field of river channel flood control safety, in particular to a method for safety analysis and bank slope stability determination of dangerous river erosion. Background technique [0002] The river channel risk work is an important part of the river channel regulation project, and the stability problem caused by the erosion of the bank slope has always been an important content in the flood control safety. Due to the complex shape of the sandy river channel and the large mainstream swing, the anti-scourability of the dangerous bank slope is low. During the flood, it is easily affected by the erosion of the water flow, resulting in the erosion of the slope foot, resulting in the formation of steep slopes along the bank, which threatens the safety of dangerous workers. Therefore, under the current conditions, it is of great significance to study the safety analysis and stability judgment of river flood scour to ensu...

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Problems solved by technology

For the stability of bank slopes under the action of sandy water erosion, domestic and foreign studies are mainly based on hydrodynamics combined with soil mechanics models. However, in the analysis of the impact of sandy water flow on the safety of dangerous engineering erosion during flood seasons, there is currently a lack of a method that considers the various influencing factors. The method of judging the stability of river hazards based on comprehensive effects, the lack of hydrodynamic-soil mechanics models for the safety of hazards in the study of slope stability, and the lack of judging the stability of river hazards considering the scouring effect of sandy water in flood seasons, etc.

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