Analysis Metliod for the Stability of Slope Considering Bridge Foundation Additional Load
DONG Jie1, SONG Xu - guo2
(1. Hebei Institute of Architecture and Civil Engineering, Zhangjiakou，Hebei 075000，China； 2. The Third Railway Survey and Design Institute Group Corporation，Tianjin 300142, China)
Abstract：Abstract ： Research purposes ： The stability analysis of hard high steep slopes with bridge foundations is a hard work which technicians encountered in complex mountain railway and highway engineering. The base load is delivered from the bridge foundation above by the additional load which will translate into the lateral stress acting on the inner slope， and the risk of slope sliding will increase. The design quality of bridge foundations in slopes is not effectively guaranteed because of the complexity about stability analysis to these slopes and the immaturity of bridge slope stability analysis methods. Therefore, a method about stability analysis of slope considering bridge foundation additional load is studied in order to provide help for the dsign of slope bridge foundation engineering. Research conclusions:( 1 ) A stability analysis method considering the additional load transfer， the rock and soil mechanics parameters and the geometric shape of bridge foundation slope is established，and this method is applied to research on the slope stability ^fected by the additional load in different locations of bridge foundation. ( 2 ) A calculation model for safety factor about bridge slope can be used for design work of bridge foundation, and the stability safety factor of the bridge foundation slope can be calculated for the known layout parameters of horizontal distance and depth , or , the different bridge foundation arrangement schemes are optimized and selected under a given safety factor conditions through the analysis on different excavation angles. (3 ) In the course of preliminary design of the 0#abutment of the 3# Benxi Bridge of Shenyang - Dandong Passenger Dedicated Line, the abutment arrangement scheme and slope stability factor were successfully analyzed by programming based on the theory put forward in this paper, and the research result can be successfully applied to the optimal design of the bridge foundation in mountain area.
2016, Vol. 33 
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