Method for Determination of Sowing Amount of Grass Seeds on Ecological Slope Protection Slope with Three-dimensional Geotechnical Mat
A technology for geotechnical mats and determination methods, which is applied in data processing applications, instruments, calculations, etc., can solve the problems of complex calculations and the inability to accurately obtain the seeding amount of grass seeds on slopes, so as to ensure accuracy, improve applicability, The effect of improving accuracy
Active Publication Date: 2022-03-01
HEBEI UNIV OF TECH
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Problems solved by technology
[0010] The technical problem to be solved by the present invention is to provide a method for determining the sowing amount of grass seeds on the slope surface of the ecological slope protection of the three-dimensional geotechnical mesh pad. The method first combines the parameters such as potential water storage capacity, comprehensive parameters of watershed characteristics, and rainfall to obtain a method that is more suitable for the slope. The runoff depth of the slope surface under actual conditions, and the empirical formula of the local head loss coefficient fitted by the multiple regression method, as well as parameters such as slope angle, roughness coefficient, and plant tillering coefficient, are used to calculate each micro-section of the ecological slope. The head loss of the water and the maximum average flow velocity of runoff, and then combine the maximum average flow velocity with the slope typical soil particle diameter, soil particle starting velocity, plant diameter-to-spacing ratio and other parameters to obtain the optimal plant density, and divide the optimal plant density by the grass Seed weight percentage survival rate, and then multiplied by the average mass of each grass seed to calculate the sowing amount of grass seeds per square meter, which overcomes the complicated but inaccurate calculation in the construction process of the three-dimensional geotextile mat ecological slope protection existing in the prior art Finding the Defects of Sowing Amount of Grass Seed on Slope
Method used
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Embodiment 1
[0078] The specific steps of the method for determining the sowing amount of grass seeds on the slope surface of the three-dimensional geotechnical mat ecological slope protection slope of the present embodiment are as follows:
[0079] The first step is to determine the comprehensive parameters of watershed characteristics in the slope protection area of 3D geotechnical mat grass planting, referred to as CN value:
[0080]In the area of this embodiment, the situation is complicated, and the CN value is not announced, so at first the 30 groups of P obtained by actual measurement i and h i The rainfall P of the i-th rainfall in the data i Data and the i-th runoff depth h i Data, using the arithmetic mean method shown in the following formula (1) to solve and determine the potential water storage capacity S,
[0081]
[0082] In formula (1), P i is the i-th rainfall, its unit is mm, S is the potential water storage capacity, its unit is mm, h i is the i-th runoff dep...
Embodiment 2
[0136] The value of the survival rate χ of weeding seed weight percentage is 1%, G=2926g / m 2 Except, other processing steps and calculation methods are the same as in Embodiment 1.
Embodiment 3
[0138] Weeding seed weight percent survival rate χ value is 100%, G=29.3g / m 2 Except, other processing steps and calculation methods are the same as in Embodiment 1.
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The method for determining the sowing amount of grass seeds on the ecological slope protection slope of the three-dimensional geotechnical mat of the present invention relates to the stability of the slope or slope, and the method combines potential water storage capacity, comprehensive parameters of watershed characteristics, rainfall and other parameters to solve the problem that is more in line with the actual situation of the slope The runoff depth of the slope surface under the conditions, using the empirical formula of the local head loss coefficient fitted by the multiple regression method, and the slope angle, roughness coefficient, plant tillering coefficient and other parameters to calculate the head loss of each micro-section of the ecological slope and the maximum average flow velocity of runoff, and combine it with the minimum starting velocity of soil particles and the ratio of plant diameter to distance to obtain the optimal plant density, and then combine the optimal plant density with the survival rate of grass seed weight percentage and the average mass of each grass seed , to calculate the sowing amount of grass seeds per square meter of slope surface, which overcomes the defect in the prior art that the calculation is complicated but cannot accurately obtain the sowing amount of grass seeds on the slope surface in the construction process of the three-dimensional geotechnical mat ecological slope protection.
Description
technical field [0001] The technical solution of the present invention relates to the stability of side slopes or slopes, specifically, a method for determining the sowing amount of grass seeds on ecological slope protection slopes of three-dimensional geotechnical net cushions. Background technique [0002] With the enhancement of people's awareness of "ecological greenness", an ecological slope protection method using three-dimensional geotechnical mats to plant grass has been derived. This ecological slope protection method uses the growth activities and self-repairing capabilities of plants in the slope soil to achieve root reinforcement, stem The purpose of preventing rainwater erosion; at the same time, the plants on the slope can reduce the runoff velocity, reduce the impact of runoff on the soil particles on the slope, and can effectively reduce the loss of soil particles or the slope of the slope caused by runoff erosion. cracking and other natural phenomena, thereb...
Claims
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IPC IPC(8): G06Q50/02
CPCG06Q50/02
Inventor 王子寒付奇岩肖成志景晓昆黄达
Owner HEBEI UNIV OF TECH