The Distribution Of Landslide Thrust Between Arched Double-row Anti-slide Piles And Its Engineering Application

Landslide is one kind of universal geological effects. To deal with the landslide, there are many methods, such as drainge measures, cutting slope and reducing load, retaining engineering. From the practice in project, it is shown that anti-slide pile can solve many difficult projects quickly and safety. So it is developed quickly. It is a good method to deal with the landslide. But single row anti-slide pile usually can not meet the requirements of practical projects when the landslide thrust force is huge. To deal with these questions, a new anti-slide pile called the arched double-row anti-slide piles is put forward and the structure and design method are also indicated in this thesis. The design calculation steps of arched double-row anti-slide piles is the same as the design calculation of single row anti-slide pile, and the key problem is the allocation of the pushing force of the landslide thrust force between the arched double-row piles. Based on arched double row anti-slide pile thrusting force studies, the formula of arched double row anti-slide pile thrusting force allocation and its mechanical behavior is presented. The main research contents and acquired results as follows.Firstly, through the summarize of Chenzhou coal-bearing soil slope, the paper get the conclusion that coal-bearing soil have the engineering characteristics of especially apt to get efflorescence, low strength, easy to soften in water, complex mineral composition, rock mass structure is broken, the failure of artificial excavation coal-bearing soil slope is often from small deformation to the overall instability and the landslide model is pulling and pushing type landslide.Secondly, study the distribution of landslide thrust model and the mechanical of arched double-row anti-slide pile used by theoretical approaches, and get the landslide thrust distribution formula between front-row pile and back-row pile. The calculations show that the landslide thrust distribution transfer between front-row pile and back-row pile mainly through the interaction of anti-slide pile and the soil between piles. The space of front-row pile and back-row pile and the elastic modulus of soil between piles play an important role in the distribution of landslide thrust of double-row anti-slide pile, and the conclusion was verified by ANSYS.Thirdly, the traditional anti-sliding piles system is unevenly and unreasonable stressing, so in this thesis double-row anti-slide piles is set into arched double-row anti-slide piles. Then arched double-row anti-slide piles and traditional double-row anti-sliding piles are simulated by finite element method, through the comparison of them, we can draw the conclusion that the first one is more reasonable.Finally, using method described in this paper, some dispose project and feasible control engineering measures which specializing in arched double-row anti-slide piles for TongXinQiao village Resettlement residential area of Chenzhou landslide prevention and elimination are proposed, and then the finite element calculating model in the landslide project is given and analyzed. The rationality and applicability of the model in this project are validated. Thus, the arched double-row anti-slide piles is worthy of promotion and extensive application in slope reinforcement and landslide treatment engineering.