坡顶建筑荷载对土质边坡稳定性影响研究

Study on Influences of Top Building Load on Soil Slope Stability

某建筑场地边坡采用开挖堆填方式,形成了高20~25 m的人工边坡,填土强度低,压缩性高,坡顶新建建筑对填方区内边坡稳定性具有较大影响。文中以该场地边坡为研究案例,结合强度折减法,采用有限差分法对场地边坡稳定性进行研究,分别讨论了不考虑坡顶建筑荷载、考虑坡顶建筑荷载和排水条件下的边坡稳定性。结果表明,在不考虑坡顶建筑荷载的情况下,边坡稳定性较高;考虑坡顶建筑荷载后,与不考虑坡顶建筑荷载相比,边坡安全系数降低了14%;场地边坡采取有效排水后,边坡安全系数增加了8.9%。

The slope of the construction site is formed by excavation and filling,forming an artificial slope with a height of 20~25 m.The filling strength is low and the compressibility is high.The construction of a new building at the top of the slope has a significant impact on the stability of the slope in the filling area.The slope of the site is taken as the research background,combined with the strength reduction method,and the finite difference method is used to study the stability of the site slope.The stability of the slope is discussed separately without considering the top building load,considering the top building load,and considering drainage conditions.The results indicate that without considering the building load on the top of the slope,the stability of the slope is relatively high.After considering the building load on the top of the slope,the safety factor of the slope was reducde by 14%compared to not considering the building load on theo tp of the slope.After effective drainage was adopted on the site slope,the safety factor of the slope increased by 8.9%.