Landslide early warning method for cutting slope in granite area and application
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A granite and regional technology, applied in data processing applications, forecasting, alarms, etc., can solve problems such as inapplicability, achieve the effect of strong applicability and improve the quality of landslide warning
Inactive Publication Date: 2018-10-02
CHENGDU UNIVERSITY OF TECHNOLOGY +2
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[0010] The existing technologies represented by the above-mentioned patent documents are mainly aimed at landslide early warning in red bed areas, and are not applicable i
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Embodiment 1
[0046] A landslide early warning method for slope cutting in granite areas, comprising the following steps:
[0047] a. On-site investigation and mapping of landslide body slope α, landslide body area A, and landslide body upper side area A u and the side slope β on the landslide mass;
[0048] b. According to formula 1, calculate the topographic comprehensive discriminant factor T of artificial slope cutting in granite area;
[0049] T=S+1.9U Formula 1
[0050] In the formula, T is the terrain comprehensive discriminant factor; S is the slope factor of the landslide body, which is calculated and determined according to formula 2; U is the upper and lower terrain factor, which is calculated and determined according to formula 3;
[0051] S=tanα Formula 2
[0052] U=tan(α-β)A u / A Formula 3
[0053] In the formula, α is the slope of the landslide body, unit °; A u is the area of the upper side of the landslide body, unit m 2 ; A is the area of the landslide, in m 2 ...
Embodiment 2
[0066] A landslide early warning method for slope cutting in granite areas, comprising the following steps:
[0067] a. On-site investigation and mapping of landslide body slope α, landslide body area A, and landslide body upper side area A u and the side slope β on the landslide body;
[0068] b. According to formula 1, calculate the topographic comprehensive discriminant factor T of artificial slope cutting in granite area;
[0069] T=S+1.9U Formula 1
[0070] In the formula, T is the terrain comprehensive discriminant factor; S is the slope factor of the landslide body, which is calculated and determined according to formula 2; U is the upper and lower terrain factor, which is calculated and determined according to formula 3;
[0071] S=tanα Formula 2
[0072] U=tan(α-β)A u / A Formula 3
[0073] In the formula, α is the slope of the landslide body, unit °; A u is the area of the upper side of the landslide body, unit m 2 ; A is the area of the landslide, in m 2 ...
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Abstract
The invention discloses a landslide early warning method for a cutting slope in a granite area. The method comprises: step a, on-site investigation and mapping of a landslide body gradient alpha, a landslide body area A, a landslide body upper side area Au and a landslide body upper side gradient beta of an artificially cutting slope in a granite area are carried out; step b, according to a formula T=A+1.9U, a terrain comprehensive discriminating factor T of the artificially cutting slope in the granite area is calculated; step c, an equivalent rainfall R* is calculated based on a formula 4 and a rainfall factor R is calculated according to a formula 5; step d, a landslide determination value P is calculated according to a formula 6; and step e, condition determination is carried out on the landslide determination value P and a landslide threshold value Cr. According to the invention, for the artificially cutting slope in the granite area, the internal mechanism study is carried out ona landslide occurrence degree by studying a topographic factor and a rainfall factor; an early-warning calculation model of the landslide of the artificially cutting slope is established; and the landslide early-warning level is determined by a quantitative way. Therefore, the accuracy of early warning is improved substantially.
Description
technical field [0001] The invention relates to the field of manual slope cutting and landslide prevention and control, in particular to a landslide early warning method and application for slope cutting in granite areas. Background technique [0002] The new slopes formed by artificial slope cutting are widely distributed in low mountain and hilly areas, especially in the eastern low mountain and hilly areas of our country. Due to the growth of people's income, the per capita living area has also been increasing. The original housing can no longer meet the growing living needs of local residents, and new buildings need to be built. But our country has less arable land, and to protect the arable land, if we want to build new houses, we have to find another way. [0003] The only way to consider is to form a new dwelling site by cutting slopes on the side of a low mountain. In order to reduce the construction cost, increasing the slope of the slope is the usual choice of re...
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