Large Room Ecological Slope Stability Based On ABAQUS Numerical Simulation Research

Since the 21st century, with the development of infrastructure construction in our country, a large number of engineering slope have replaced the original natural slope in the highway construction and hydraulic engineering project in our country. Nowadays in responding to the call of environmental protection and sustainable utilization of resources, the use of traditional slope protection techniques such as pulp stone paving has been decreased gradually because of its poor durability, severe damage to environment and ecological benefit being not obvious. Compared with the traditional grey slope protection technology, the geocell ecological slope protection technology combined with planting grass is a kind of green compound ecological slope protection technology with the benefits of convenient construction, low maintenance cost, high ecological and economic benefits. So it’s the increasingly applied in engineering construction.When the geocell ecological slope protection technology is used for slope protection, planting grass will only start to work when the root, stem and leaf have eventually grown. These parts have great impact on the control of slope runoff and rain erosion. However, the slope mainly depends on the geocell to improve the stability of the slope because of plant roots being not yet fully developed in the early period of protection technology. In the practical engineering, local compression failure and general shear failure of protective layer appear constantly, which lead to failure of slope protection engineering and bring huge economic losses. Therefore, it’s of theoretical and practical significance to make deep research on the stability of the geocell ecological slope protection technology.This paper firstly introduced the domestic research status of the slope stability and three-dimensional geocell and strength reduction method. Strengthen the introduction about the character of geocell, make full analysis of the interaction between the geocell and inner soil, make further study of functional mechanism of the slope protection technique when it’s applied in soft soil subgrade reinforcement and slope protection. Finally by combining theoretical analysis and numerical simulation method, we make use of ABAQUS to establish three-dimensional finite element model of geocell protective slope project which is adopted from Jinan-Qingdao highway. stability analysis is made by the method of coefficient of strength reduction, and under the same conditions, and get the result of the safety factor of different simulation conditions, plastic distribution, distribution of slope body parts’ move as well as slope failure time under the same working condition by changing the influence parameters like rainfall intensity, rainfall duration. By comparing the simulation results, enhancement effect on slope stability by the geocell is identified under different conditions of rainfall infiltration. In addition, the stress distribution of geocell which is applied in the slope protection is analyzed in this paper, which will provided the effective basis for future construction.