西南某机场高填方体地基稳定问题研究

场区地基的岩组类型和产状是填方体稳定性分析与评价的重要组成部分。西南某机场高填方体地基工程地质条件较差，松散覆盖层土体类型多。根据混合土的发育分布规律不同可划分出A、B、C、D4个分布区，重点选定5条计算剖面，对高填方区含混合土斜坡地基的稳定性和分布特征进行计算与分析，除1条剖面在长期工况下的整体稳定性不能满足安全要求外，其余4条剖面在各种潜在滑面组情况下的整体稳定性均能满足安全要求。三维稳定性计算同时也表明：在最不利的条件下，东2^#、东5^#沟的稳定性系数均在1．70以上。其研究思路对整个场区含该种斜坡地基的整体及局部稳定性分析具有重要意义，成果可为类似的工程提供借鉴与参考。

On stability of high fill body in an projected airport

The petrofabric type and attitude of foundation on site is important to the analysis & estimate of filling body stability. Engineering geological conditions are undesirable and types of soil are varied under high filling area in study area. The area is divided into A,B,C and D blocks according to the distributing rule of mixed soil. Based on five-calculation sections, stability and distributing characteristics of slope foundation with mixed soil under high filling area are discussed in this article. The whole stability about four-calculation sections except one can meet safety requirement under long-term service and the condition of various potential slide faces. Besides three-dimensional stability calculation also shows that stability coefficients of trench No.2 and No.5 on the east of site are above 1.7 under the most disadvantageous conditions, which can be much important to the whole-local stability study on the slope foundation of whole site. It may provide much reference for research of similar engineering.