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Method for determining hydraulic parameters and water inflow in gravelly soil erosion stage

A technology for determining hydraulic parameters and methods, applied in the field of geological and geotechnical engineering, can solve problems such as difficult quantitative evaluation of seepage stability and difficult determination of water inflow

Active Publication Date: 2021-07-06
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0005] The embodiment of the invention provides a method for determining the hydraulic parameters and water inflow in the gravel soil erosion stage, which can solve the problem that it is difficult to quantitatively evaluate and define the seepage stability from seepage erosion to water inrush in the existing research and related specifications, that is, inrush The problem of water quantity is difficult to determine, which leads to sudden safety problems

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  • Method for determining hydraulic parameters and water inflow in gravelly soil erosion stage
  • Method for determining hydraulic parameters and water inflow in gravelly soil erosion stage
  • Method for determining hydraulic parameters and water inflow in gravelly soil erosion stage

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Embodiment Construction

[0051] Below will combine the appended in the embodiment of the present invention figure 1 to attach Figure 11, clearly and completely describe the technical solutions in the embodiments of the present invention, obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] The invention provides a method for determining hydraulic parameters and water inflow in the gravel soil erosion stage:

[0053] Before implementing this method, it is necessary to draw the figure 2 The PSD curves of the soil particle size distribution of three different soil types are shown, and the geometric parameters of various gravel soils are obtained from the PSD curves. The geometric parameters include d 10 、d 30 、d 60 、d 70 ...

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Abstract

The invention relates to a method for determining hydraulic parameters and water inflow in a gravelly soil erosion stage. The method comprises the following steps of calculating soil particle content P and soil porosity n of each stage of particle size according to a grading erosion principle, and drawing a PSD curve of each stage of particle size and a PSD curve cluster in each erosion stage, calculating the equivalent diameter Dh of the soil particles according to the average particle size Dj in the PSD curve, and calculating the minimum equivalent pore diameter d0 of the soil particles according to the equivalent diameter Dh, calculating the critical hydraulic gradient icr of particle erosion according to the soil particle content P, calculating a permeability coefficient kh according to the soil porosity n and geometric parameter values of soil particles in the PSD curve cluster, and according to the permeability coefficient kh, calculating the seepage flow velocity v and the total seepage flow Q. The erosion degree and the dangerous condition of the gravelly soil are reversely deduced by calculating the total seepage flow, so that corresponding measures are taken for treatment and protection, and accidents are avoided.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a method for determining hydraulic parameters and water inflow in the gravel soil erosion stage. Background technique [0002] Among the many factors that affect the stability of foundation pit excavation and the safety of karst subsidence, the seepage erosion of gravel soil has attracted widespread attention. In particular, bimodal gravel soil with missing intermediate particle size or wide-graded gravel soil distributed in karst areas is an important factor for the formation of waterproof and seepage-proof rock-soil structures and karst collapse. [0003] In the existing technology, there have been many studies on seepage and erosion problems such as fine particle loss and piping that are easily caused by the particle distribution characteristics of gravel soil after soaking in water. Different from flowing soil erosion, in the case of piping seepage erosion and hydrauli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N13/04G01N33/24
CPCG01N15/0826G01N13/04G01N33/24G01N15/08G01N15/02G01V9/02G01V9/00
Inventor 朱斌林传傣陈俊陈菊艳邓显瑜李博
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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