攀枝花机场北东角滑坡整治措施研究

攀枝花机场地形及地质条件复杂,在修建过程中实施了大量的挖填方工程,填方边坡形成的沉降变形和滑坡成为机场主要的工程病害。本文阐述了机场北东角滑坡的基本特征及成因,综合反分析演算和试验结果确定了滑动面的抗剪强度参数,并对滑坡稳定性进行了参数敏感性分析。在滑坡推力计算的基础上,对滑坡整治方案进行对比论证,从而确立了以抗滑桩、预应力锚索框架、削坡减载和地表防排水为主的综合整治措施。

REMEDIATION MEASURES ON THE LANDSLIDE IN FILL SLOPES IN NORTH-EAST PART OF PANZHIHUA AIRPORT

Panzhihua airport was constructed in an area with complicated topographical and geological conditions and therefore involved a large amount of excavation and filling works. At present, the settlement and landslide in filled land and slopes are substantial and cause the many problems for safe and smooth operation of the airport facilities. This paper presents the basic characters and causes of the landslides in the fill slopes. Based on the back-analysis and trial results, the paper ascertains the shear strength parameters at the shear plane of the slope deformation, and analyses the sensitivity that the shear strength parameters can make for the changes of the slope stability. Furthermore, on the basis of the landslide thrust calculation, the paper contrasts and demonstrates each remediation measure, and establishes a comprehensive remediation scheme which includes anti-slide piles, prestressed ground anchors with reinforced concrete beams on the surface, trimming back slopes and provision of surface drainages.