|
Slope Stabilization ecological slope protection , which is based close to the natural way to reinforce and stabilize slope and slope . However, due to the variety of grass species , randomness , root strength variability of root distribution of complex factors , the study of the the vegetation root solid earth theory is still at the preliminary study stage . Thesis, vetiver roots as the research object , the first study its root morphology , distribution , followed by vetiver roots were three trials to study the roots of the tensile strength of the single , roots and soil contact surface characteristics and strength properties of the root - soil complex . Root tensile strength test instrument pendulum paper tensile testing machine , testing of the main factors affecting the root tensile strength studies major factors , including the water content of the root , root diameter and root length . The results showed that: the roots in the case of air-dried for one day , tensile strength, maximum; in the case of the same root length , root diameter, the greater the lower the intensity ; the root diameter is substantially equivalent to the case , root longer , the lower the intensity . The main instrument of the root soil contact surface characteristics strain controlled direct shear apparatus , direct shear tests on prime soil and root soil complex , come to the the root soil the complex contact surface of the interface cohesion , interface friction angle , interface friction coefficient and the coefficient of friction than the large prime soil , this shows that the presence of the root system , increase the frictional resistance between the roots and the soil , increases the strength of the soil . The stress and strain controlled triaxial shear penetration tester the root soil strength properties of the complex to conduct a study into the root soil composite shear strength index variation in the different the containing root biomass and water content , root soil composite the body of the stress - strain relations and strength characteristics , and compared the prime soil containing root strength properties of soil , as well as their deformation and failure mode . Finally, analysis of the mechanical effect of the solid earth on the the vegetation slope in roots , deep rough roots as the anchor , shallow roots and the surrounding soil as a homogeneous medium , the finite element model , analysis of vegetation on the edge the impact of the overall stability of the slope , the calculation results planting vegetation can play a role reinforce Slope .
|