用土力学的新概念解读和修正经典饱和土力学  

Interpretation and Revision of Classic Saturated Soil Mechanics with New Concept of Soil Mechanics

作　　者：蒙理明 

机构地区：[1]海口市城市规划设计研究院,海口570105

出　　处：《建材世界》2015年第3期101-106,共6页The World of Building Materials

摘　　要：论述了应该用有效应力的新概念代替经典有效应力原理。总应力压缩模量与渗流水等效压缩模量的曲线相似;有效应力压缩模量起加劲作用,而不是起决定性作用。土的压缩变形计算中应用有效应力原理是错误的。对于起始水力坡降,引入饱和粘性土的自由水压力衰减概念。在饱和粘性土中,自由水通道率折减不大,相对自由水压力通过一定厚度后衰减为零。所以,新概念土力学的算法接近我国规范:"对粘性土宜按水土合算计算"。还解读了地下室浮力折减、流沙陷阱等等。This paper discusses that it should use the new concept of effective stress instead of classical effective stress principle. Curves of total stress compression modulus and the seepage water equivalent compression modulus are similar; effective stress compression modulus is stiffening effect, rather than a decisive role. Using the principle of ef- fective stress is wrong in the soil compression deformation calculation. For the initial hydraulic gradient, this paper in- troduced a concept of the free water pressure attenuation of saturated cohesive soil. In saturated cohesive soil, free wa- ter channel rate reduction is not large, relatively free water pressure attenuation is zero through certain thickness. So the new concept of soil mechanics algorithm is close to our specification： ＂cohesive soil should be calculated on soil and water economical＂. Also the basement uplift reduction, shifting sand traps and so on are introduced.

关 键 词：有效应力的新概念 土的压缩变形 饱和粘性土 起始水力坡降 自由水压力衰减 

分 类 号：TU43[建筑科学—岩土工程]