Calculation Of Micropile Internal Forces When Reinforce The Slope

This paper studies the micropile and the slope of the internal force calculation program design.Landslide is a geological disaster which is widely distributed and occurred in a high-frequency rate. For conditions it occurred and formation mechanism is complex and changeable, it easily takes harm to people's production and life. With the economic development and land's utilization, more and more landslide will be encountered and more and more methods will be used one of which is micropile which has been developed until the last two decades.Micropile is a small diameter bored piles. Its diameter is between 100mm to 300mm. Pile body is made up of pressed cement(sand) or concrete and steel which could be reinforced, rail or steel pile according the needs of force. As a new type of retaining structures, the construction is simple and rapid and economic. Micropile which is a considerable potential reinforcement are used in slope and landslide project more and more. With the state's infrastructure's increasing, a large number of railways, highways and infrastructure projects such as electricity and water come into the building. To improve the ability of withstanding geological disasters, protecting people's lives and property, there is great important theoretical and practical value to study the micro-pile force mechanism, establish the method of calculating reasonable micropiles for improving the design of the project level.In this paper, the current development about reinforcing the slope with micropile at home and abroad, the reinforcement mechanism of micro-piles, micropile classification, construction and the calculation width, piles row spacing, anchoring depth, intensity and depth of cross section and so on are elaborated. The micro-pile system is divided into three: an independent micro-pile system, micro-pile system plane frame and space frame system of micro-pile. Based on the way of thinking of structural mechanics and underground structure, the force model and internal calculation of the three systems are analyzed.MATLAB language are used for programming the calculation of internal force and applied to landslide control about Fenghuangshan Lueyang example. Micropiles general location of the maximum internal forces in the pile under the sliding surface and its vicinity, too.This proposal:In the design of the micropiles,it should be strengthed the reinforcement ,and the moment should be considered,the surrounding of the micropiles should be reinforced.