Method for calculating seepage control equation of unsaturated loess slope under rainfall infiltration

A seepage control and calculation method technology, which is applied in the fields of loess and civil engineering, can solve the problems of inaccurate calculation parameters of rainfall infiltration unsaturated soil and difficulty in analytical calculation of rainwater seepage field, and achieves the effect of solving the difficulty of analytical calculation.

Pending Publication Date: 2021-04-20
XIAN UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the analytical calculation of the seepage field of the rainwater infiltration sl

Method used

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  • Method for calculating seepage control equation of unsaturated loess slope under rainfall infiltration
  • Method for calculating seepage control equation of unsaturated loess slope under rainfall infiltration
  • Method for calculating seepage control equation of unsaturated loess slope under rainfall infiltration

Examples

Experimental program
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Effect test

Embodiment 1

[0059]Tiny six-sided body is taken in the unsaturated loess soil, according to the quality conservation principle and the Darcy law, the seepage control basic differential equation of the calculation model of unsaturated loess slope is derived:

[0060]

[0061]In order to analyze the oblique slope OA paragraph infiltration problem,figure 1 The X-axis and Z-axis rotation angle α get a new coordinate system ox * z *, establish a new seepage control differential equation:

[0062]

[0063]The Dibequiode Curve Equation and the unsaturated soil permeability equation are described by the Van GenuchtenTen function and the Gardner function, and the above-formula dense equation is:

[0064]

[0065]The above equation wave is synchronized to solve its pilot and its pending coefficients.

[0066]Depending on the process of pending coefficient, slope coordinate system, the slope surface of the rainfall, the slope surface is vertical depth of Z *, and the head hWX The relationship between T and rain intensity P and...

Embodiment 2

[0080]This example discloses a method of calculating a rainfall infiltration of non-saturated loess slope percentage, including:

[0081]Any tiny hexahedral, the ribs of the hexahedron are parallel to the X, Y, Z coordinate of the angular coordinate system in the unsaturated loess soil, respectively, of which the heart points are p (x, y, z) and micro-six faces. It is ΔX, ΔY, Δz; the components of the water flow throughput of the P (X, Y, Z) points are Q.xM / D, QyM / D, QzM / D; the average density of water near the P point is ρwg / cm3.

[0082]In the unit time, the quality of the seepage rain in the X-axis direction is:

[0083]

[0084]In the unit time, the quality of the seepage rain in the six-faced body in the X-axis direction is:

[0085]

[0086]In the hexahedral, the difference in inflow quality and outflow in the X direction is:

[0087]

[0088]The difference between the water flowing out of the water flowing from the periphery of the mass conservation law is equal to the amount of water qualit...

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Abstract

The invention discloses an unsaturated loess slope seepage control equation calculation method under rainfall infiltration. The method comprises steps of 1, building a loess slope seepage field analysis model of a horizontal slope surface and an inclined slope surface through reasonable assumption according to the damage influence factors of a loess slope under the rainfall infiltration condition, a two-dimensional unsaturated loess seepage control equation being obtained through a porous medium theory and a hydraulics theory; 2, converting coordinate systems in the vertical rainfall direction and the horizontal direction into a direction along the slope surface and a direction perpendicular to the slope surface to obtain an unsaturated loess seepage control equation after coordinate conversion and simplification; and 3, according to the soil-water characteristic curve, the permeability coefficient equation and the Darcy law, an analytical solution of the transient moisture content in the loess slope in the rainfall process being derived, and the rainwater infiltration depth and the saturated infiltration depth being determined. The method has the effect of solving problems that the seepage field of the rainwater infiltration side slope is difficult to analyze and calculate and the calculation parameters of the unsaturated soil are inaccurate.

Description

Technical field[0001]The present invention relates to the field of loess and civil engineering, especially a method for calculating a decoir deposited long-saturated loess side slope permeation.Background technique[0002]my country is one of the most serious regions in the world's slope, especially in the western region and other provinces, and my country's loess coverage is up to 6.3 × 105km3. Loess is a special soil having a moisture, large pore, and the improvement of mechanical intensity of soil water, so the loess slope is often happened. It is widely distributed, the number is large, and the landslide scale is small and medium-sized in size and medium size below the Liupanshan area and the central Loess Plateau. Rainfall, especially heavy rains, becoming the most important cause of loess slope, natural and artificial loess slopes, there is a lot of instability in the rainy season, causing property losses and casualties, and affecting social stability and construction. Therefore...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/11G06F17/13G06F17/15G06F111/10G06F119/14
Inventor 韩佳明董照苏三庆任建喜刘明明金超
Owner XIAN UNIV OF SCI & TECH
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