摘要
通过合理的假设和简化,将溶洞顶板与嵌岩灌注桩看成一个相互作用系统,只考虑桩基的竖向荷载对顶板的影响。同时根据溶洞顶板的特征和边界条件,将其简化为椭圆形和圆形顶板两种力学模型。通过计算分析,得出了椭圆形顶板的应力和最大挠度公式,以及圆形顶板的挠度表达式,为合理地验算顶板的安全厚度提供了一定的依据。
Based on the reasonable hypothesis and simplification, the cavity roof and rock-socket piles can been simplified as an inter-action system, and the effect of vertical load from piles on the roof is only considered, According to the characteristic and the boundary conditions, the cavity roof is respectively simplified as two kinds of mechanical models （round model and ellipse model）. Through the calculation and analysis, the stress formula and the maximum deflection formula for the ellipse roof is deduced, and the deflection expression for round roof is also deduced, which give the base for the reasonable calculation of the safety thickness of cavity roof.
出处
《工程勘察》
CSCD
北大核心
2005年第5期33-35,共3页
Geotechnical Investigation & Surveying
关键词
溶洞顶板
安全厚度
嵌岩桩
力学模型
cavity roof
safety thickness
rock-socket pile
mechanical model
