PRORAČUN STABILIZACIJE KLIZIŠTA U ZONI USEKA BR. 4 OD km 878+650 DO km 879+050

Abstract

The paper presents retaining structure to stabilize the landslide in the middle section from 878+775 to km 878+825, and slope protection on both left and right sides in order to provide vertical cutting and excavation to the level of highway platform. Retaining structure was designed as micro-pile wall with three different types of walls depending on the pile position. Micro-pile is made from steel pipe dia. Ø139.6 mm and 8.8mm thick wall, which is filled with cement mortar of minimum strength 30 MPa. In a constructive view, the designed retaining structure is a plate that is resting on the continual tie beams, which are supported in discrete points by geotechnical anchors. Calculation of stability and bearing capacity of protective structure was carried out in several phases. Phases are modeled according to the technology of execution of works. The calculation was performed in FEM program called Plaxis 2D. This calculation is based on the finite element method, using an incremental, iterative process. Based on the performed analysis, calculation of stability and bearing capacity, it can beconcluded that designed support structure satisfies all the necessary conditions of stability and bearing capacity.