建材世界
建材世界
건재세계
THE WORLD OF BUILDING MATERIALS
2015年
3期
101-106
,共6页
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
有效應力的新概唸%土的壓縮變形%飽和粘性土%起始水力坡降%自由水壓力衰減
유효응력적신개념%토적압축변형%포화점성토%기시수력파강%자유수압력쇠감
the new concept of effective stress%soil compression deformation%saturated cohesive soil%initial hydraulic gradient%free water pressure attenuation
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。
論述瞭應該用有效應力的新概唸代替經典有效應力原理。總應力壓縮模量與滲流水等效壓縮模量的麯線相似；有效應力壓縮模量起加勁作用，而不是起決定性作用。土的壓縮變形計算中應用有效應力原理是錯誤的。對于起始水力坡降，引入飽和粘性土的自由水壓力衰減概唸。在飽和粘性土中，自由水通道率摺減不大，相對自由水壓力通過一定厚度後衰減為零。所以，新概唸土力學的算法接近我國規範：“對粘性土宜按水土閤算計算”。還解讀瞭地下室浮力摺減、流沙陷阱等等。
논술료응해용유효응력적신개념대체경전유효응력원리。총응력압축모량여삼류수등효압축모량적곡선상사；유효응력압축모량기가경작용，이불시기결정성작용。토적압축변형계산중응용유효응력원리시착오적。대우기시수력파강，인입포화점성토적자유수압력쇠감개념。재포화점성토중，자유수통도솔절감불대，상대자유수압력통과일정후도후쇠감위령。소이，신개념토역학적산법접근아국규범：“대점성토의안수토합산계산”。환해독료지하실부력절감、류사함정등등。
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.
