南水北调中线工程安阳段渠坡换填土广义土–水特征曲线的试验研究

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摘要为探讨应力状态和应力路径对非饱和土广义土–水特征曲线的影响，以南水北调中线工程安阳段渠坡换填土为对象，应用非饱和土三轴仪，进行一系列控制偏应力和净平均应力为常数的三轴收缩试验、控制偏应力和基质吸力为常数的三轴各向等量加压试验和控制净平均应力和基质吸力为常数的三轴等p剪切试验。研究结果表明：基质吸力、净平均应力和偏应力对水量变化均有较大影响；提出改进的非饱和土广义土–水特征曲线的表达式，能综合反映应力状态和应力路径的影响，用该式计算的结果与试验数据更为吻合。

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	章峻豪1
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	陈正汉1
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关键词 ：土力学；南水北调中线工程；换填土；广义土&ndash, 水特征曲线；应力状态；应力路径

Abstract：In order to analyze the influence of stress state and stress path on the generalized soil-water characteristic curve，namely generalized SWCC，using the triaxial apparatus for testing unsaturated soils，a series of triaxial shrinking tests with deviator stress and net mean stress being constant values，triaxial isotropic compression tests with deviator stress and matric suction being constant values and triaxial p-fixed consolidated drained shear tests with net mean stress and matric suction being constant values are carried out against the backfill soil of the canal slope at Aayang district of South-to-North water diversion project. The test results show that matric suction，net mean stress and deviatoric stress have significant effect on the discharge of water. The expression of improved generalized SWCC is proposed，which can take the effect of stress state and stress path on the discharge of water comprehensively into account，and the computed results using this expression are in good agreement with the test data.

Key words： soil mechanics middle route of South-to-North water diversion project backfill soil generalized SWCC stress state stress path

引用本文:

章峻豪1，2，陈正汉1，2. 南水北调中线工程安阳段渠坡换填土广义土–水特征曲线的试验研究[J]. 岩石力学与工程学报, 2013, 32(s2): 3987-3994.
ZHANG Junhao1，2，CHEN Zhenghan1，2. EXPERIMENTAL STUDY OF GENERALIZED SOIL-WATER CHARACTERISTIC CURVE OF BACKFILL SOIL FROM CANAL SLOPE AT ANYANG DISTRICT OF MIDDLE ROUTE OF SOUTH-TO-NORTH WATER DIVERSION PROJECT. , 2013, 32(s2): 3987-3994.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/Is2/3987

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