Research On The Mechanical Disturbance Of The Effect On The Stability Of The Soil

Object:China is one of the countries that have the most serious soil erosion。The soil erosion is has been recognized for our country's top environmental problems by authorities and experts. With the rapid development of economic society, highway, water conservancy and other development projects be constructed more and more.The construction not only damage the topography and landform,but also destroy the existing natural vegetation and form large dumped soil and slag.So what to pay attention to the soil erosion during construction will become an important topic in the current economic problems.According to the bayingou river basin of the climate, soil, engineering construction characteristics, through the experiment,we can observate the rule that the soil erosion change in different slope, moisture content, wind speed, rainfall intensity.Then we can come up with the soil and water conservation measures,test basis and the evaluation indicator to this project construction.Methods:On soil physical properties, bulldozers slope, rainfall, wind speed and other factors set different treatments, observing the amount of mechanical disturbance and wind erosion of soil volume changes, field test group of 144 test data obtained, the use of data analysis software Factors associated analysis and regression analysis, the following conclusions:Conclusion:1. After the the soil is disturbanced by machinery, the cohesion cut the 45 percent.And the friction Angle reduced 41%; Its permeability increased 51 percent..2. After the the soil is disturbanced by machinery, the clay be effected as same as the gravel soil by the water erosion, but gravel soil erosion resistance is far better than clay ability by the wind erosion.3. In the process of soil erosion by hydraulic, rainfall intensity is the main influencing factors and slope is secondary, water erosion amount positively correlated with rainfall intensity, and slope is inversely related. In the process of wind erosion, wind speed is the main influencing factors, moisture content is secondary, and slope is the minimum, wind erosion amount is a positive correlation, and soil moisture content is inversely related.4. For clay, we can increase the soil surface'roughness.That will resist wind erosion.And we can cover 5 cm gravel stones on the soil surface.In addition we can water the soil and the effect that resist wind erosion will be more apparent.5. Increasing the soil moisture content and increasing the viscosity of poly force between particles, it can effectively improve the ability of soil erosion resistance.To the clay, moisture content of the soil is controled at the 8.9% or above, gravel moisture content is controled at 6.2% or above.