北盘江大桥岸坡稳定性及桥基选址的综合分析

SYNTHETIS ANAL YSES ON STABILITY OF RIVER'S BANK SLOPES AND DISPOSI-TION OF BRIDGE FOUNDATIONS FOR BEIP ANJIANG RAIL WAY BRIDGE

本文给出采用实地考察、离散元模拟、有限元分析、底摩擦试验、定量分析和理论计算等方法和技术，对北盘江大桥桥位峡谷岸坡的工程地质条件、岸坡岩体可能的变形破坏模式、变形发展规律、岸坡岩体的位移和应力状态、岸坡的总体稳定性、岸坡的稳定坡角、墩台基础设备的位置及相应的安全系数所做的综合分析的方法和结果。

The methods and technique applied in this paper are practical investigation,finiteelement analysis,separated element simulation,foundation friction test,quantitative analysisand theoritical calculations,etc.For analyzing the characteristics of the river valley wherethe Beipanjiang Railway Bridge is situated,the authors propose a method of synthetic analy-ses.The synthetic analyses consist of the analysis of engineering geological conditions of theriver bank slopes,the possible mode of strain failure of slope rock mass,the developing regu-larity of strian,the displacement and stress conditions of slope rock mass,the general stabili-ty of bank slopes,the stable slope angle of bank slopes,the disposition of bridge pier founnda-tions and its corresponding safety coetticients.The results of the synthetic analyses are alsodescribed in this paper.