地基土上水工建筑物的抗滑动稳定研究

研究地基土上水工建筑物滑动设计和计算中存在的问题。利用基坑内压板抗滑动试验成果,确定地基土包括回弹影响后的抗滑动承载能力。采用地基土承受偏心荷载的最大压应力σmax控制地基土与压板的位移和抗滑动形式,可以发生不同的3种最大位移面,形成6种抗滑动形式。根据地基土承受的最大压应力,提出设计抗滑动的计算方法:定量确定地基土与压板抗滑动的摩擦系数计算值,地基土的抗滑动安全系数由指标安全系数控制,修正在地基土上建筑物整体滑动的计算公式,计算预测可能发生的多种最大位移面和抗滑动形式及绘制地基土滑动区轮廓,限定地基土发生平面抗滑动形式时承受的最大压应力值。按拟定方法,回顾分析3座已建水工建筑物,分析计算成果符合实物工况。

Study on anti sliding stability of hydraulic structures on subbed soils

To make a study on the anti-sliding stablity of foundation of hydraulic structures on subbed soils, and based on the result by anti-sliding tests of dragged concreting clip plates in foundation pits, the anti-sliding stablity of foundation on subbed soils was determind. There are 3 different forms of largest displacement with 8 different forms of silding move of subbed soils caused by the different maximum compressive stresses of eccentric loads on them. It is worked out a design method to determine the sliding frictional resistances and the forms of sliding moves of foundation subbed soils; a formula for the integal frication resistance to sliding for the structure; a formula for the the anti-sliding move of subbed soils and a rule to distinguish the plane sliding move of foundation subsoils with others. To analyze 3 structures which have been established provides a confirmation with the reality for the design method.