建材世界
建材世界
건재세계
THE WORLD OF BUILDING MATERIALS
2015年
4期
88-92
,共5页
饱和土的大气张力郎肯土压力%相对自由水压力衰减%主动土压力负值%扶住支护
飽和土的大氣張力郎肯土壓力%相對自由水壓力衰減%主動土壓力負值%扶住支護
포화토적대기장력랑긍토압력%상대자유수압력쇠감%주동토압력부치%부주지호
atmospheric tension Rankine's earth pressure of saturated soil%relatively free water pressure attenua-tion%active earth pressure negative%hold support
该文总结了饱和土的大气张力郎肯土压力算法。其计算要点有：饱和度系数、自由水通道率、膜的抗剪强度贡献、大气张力郎肯土压力。算例分析表明，按大气张力郎肯土压力，饱和粘土的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，其结果与水土合算的接近。饱和土的大气张力郎肯土压力算法，接近我国规范，对砂性土宜按水土分算计算，对粘性土宜按水土合算计算。表层为较硬的饱和粘土的基坑，按经典郎肯土压力，基坑上部主动土压力为负值，表示土体拉住支护，处理为零，这是错误的；而按大气张力郎肯土压力，表示坑内支护上的大气压强能抵抗主动土压力，扶住支护。
該文總結瞭飽和土的大氣張力郎肯土壓力算法。其計算要點有：飽和度繫數、自由水通道率、膜的抗剪彊度貢獻、大氣張力郎肯土壓力。算例分析錶明，按大氣張力郎肯土壓力，飽和粘土的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，其結果與水土閤算的接近。飽和土的大氣張力郎肯土壓力算法，接近我國規範，對砂性土宜按水土分算計算，對粘性土宜按水土閤算計算。錶層為較硬的飽和粘土的基坑，按經典郎肯土壓力，基坑上部主動土壓力為負值，錶示土體拉住支護，處理為零，這是錯誤的；而按大氣張力郎肯土壓力，錶示坑內支護上的大氣壓彊能牴抗主動土壓力，扶住支護。
해문총결료포화토적대기장력랑긍토압력산법。기계산요점유：포화도계수、자유수통도솔、막적항전강도공헌、대기장력랑긍토압력。산례분석표명，안대기장력랑긍토압력，포화점토적자유수통도솔절감불대，상대자유수압력통과일정후도후쇠감위령，기결과여수토합산적접근。포화토적대기장력랑긍토압력산법，접근아국규범，대사성토의안수토분산계산，대점성토의안수토합산계산。표층위교경적포화점토적기갱，안경전랑긍토압력，기갱상부주동토압력위부치，표시토체랍주지호，처리위령，저시착오적；이안대기장력랑긍토압력，표시갱내지호상적대기압강능저항주동토압력，부주지호。
This paper summarizes the algorithm of the atmospheric tension Rankine's earth pressure of saturated soil.The calculation point is,saturation coefficient,the rate of free water channel,the shear strength of membrane contribution,atmospheric tension Rankine's earth pressure.Example analysis shows that,according to the atmospheric tension Rankine's Earth pressure,reduction of free water channel rate of saturated clay is not large,relatively free wa-ter pressure through a certain thickness attenuation is zero,the result with water and soil economical approach.Algo-rithm of the atmospheric tension Rankine's earth pressure of saturated soil,close to the specification in our country,the sand soil should calculate by Soil and water points algorithm,the cohesive soil should be calculated by water and soil e-conomical approach.For the foundation pit as the surface is a hard saturated clay,according to the classical Rankine's earth pressure,the upper active earth pressure is negative,saying the soil pull in support,handling is zero,that is wrong;and according to the atmospheric tension Rankine's earth pressure,saying the atmospheric pressure on the pit supporting can resist active earth pressure,hold support.
