考虑坡顶建筑荷载的垂直高边坡稳定性分析

Analysis on Stability of Vertical High Slope Considering Building Load of Slope Top

摘要:

垂直支护的高边坡坡顶进行建设时,保证边坡的稳定是一项重要工作。本文采用有限元方法研究了一般工况和地震工况下垂直支护的高边坡坡顶有近坡建筑时的稳定性,模拟考虑了浅基础和桩基础两种基础形式。通过分析浅基础埋深和桩长对边坡破坏模式、安全系数以及支护桩受力的影响,提出了考虑坡顶建筑结构的边坡支护方案,并通过工程实例进行验证。结果表明：一般情况下,坡顶建筑会对边坡产生不利影响,坡顶建筑采用桩基础对边坡稳定性效果显著。当建筑采用浅基础时,浅基础埋深越大,边坡安全系数越大,支护桩受力越小；当建筑采用桩基础时,桩长越长边坡越稳定,支护桩受力越小,而当桩长增加到坡底深度,支护桩受力不再受桩基础长度的影响。

Abstract:

It is important to ensure the stability of a high vertical slope when the top of the vertical stopping high slope is constructed. The finite element method is used to study the stability of vertically supporting high slopes with the buildings near the top of the slope under the general and seismic conditions. Two foundation forms of shallow foundation and pile foundation are considered in the simulation. By analyzing the effects of the embedded depth of the shallow foundation and the length of the piles on the failure mode of the slope, the safety factor and the force of the supporting piles, a slope supporting scheme considering the building structure on the slope top is proposed, and is verified by the engineering examples. The results show that, in general, a building constructed at the top of a slope has an adverse impact on the slope, and the pile foundation of the building at the top of the slope has the obvious effect of stability. When the shallow foundation is used for the buildings, the greater the embedded depth of shallow foundation is, the greater the safety factor of slope is and the smaller the force of the supporting pile is. When the pile foundation is used for the building, the longer the pile length is, the more stable the slope is, and the smaller the force of the supporting pile is. However, when the pile length increases to the depth of the slope bottom, the force of the supporting pile is no longer affected by the length of the pile foundation.