土的经验参数(物理指标、压缩、变形模量、剪切强度)

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1、有关土的经验参数一、原状土物理性质指标变化范围原状土物理性质指标变化范围，见表3-3-28。原状土物理性质指标变化范围表3-3-28指标砾石土砂粘性土砂粘土比重2.65~2.792.65~2.772.63~2.762.62~2.73密度（g/cm3）1.87~2.281.72~2.221.56~2.181.32~1.94含水量（%）14.9~18.011.3~33.915.4~79.424.7~86.9天然孔隙比0.277~0.6220.308~1.2690.413~1.9620.803~2.240最小孔隙比0.200~0.4590.20

2、6~0.8880.337~1.2750.391~1.848最大孔隙比0.500~1.0000.589~1.8720.672~2.2240.958~2.864饱和度0.44~0.950.52~1.000.65~1.000.68~1.00液限——18~3626~68塑限——15~1916~52注：粘砂土3＜Ip≤7；砂粘土7＜Ip≤17二、土的平均物理、力学性质指标，见表3-3-29。土的平均物理、力学性质指标，见表3-3-29。土的平均物理、力学指标表3-3-29土类孔隙比e天然含水量W(%)塑限含水量wp(%)密度P(g/cm3)凝聚力（

3、kpa）内摩擦角φ（°）变形模量E0（MPa）标准的计算的砂类土粗砂0.4~0.50.5~0.60.6~0.715~1819~2223~25———2.051.951.90210000424038464033中砂0.4~0.50.5~0.60.6~0.715~1819~2223~25———2.051.951.90321000403835464033细砂0.4~0.50.5~0.60.6~0.715~1819~2223~25———2.051.951.90642000383632372824粉砂0.5~0.60.6~0.715~1819~22—

4、—2.051.958653363414120.7~0.823~25—1.90422810粘性土粉质粘土粘砂土0.4~0.50.5~0.60.6~0.715~1819~2223~25＜9.42.102.001.951075652302827181411砂粘土0.4~0.50.5~0.60.6~0.715~1819~2223~259.5~12.42.102.001.951286753252423231613土类孔隙比e天然含水量W(%)塑限含水量wp(%)密度P(g/cm3)凝聚力（kpa）内摩擦角φ（°）变形模量E0（MPa）标准的计算的砂

5、类土砂粘土粘土0.4~.50.5~0.60.6~0.70.7~0.815~1819~2223~2526~2912.5~15.42.102.001.951.904221147251510524232221452115120.5~0.60.6~0.70.7~0.80.8~0.90.9~1.019~2223~2526~2930~3435~4015.5~18.42.001.951.901.851.805025191183515108522212019183918151380.6~0.70.7~0.80.8~0.90.9~1.023~2526~29

6、30~3435~4018.5~22.41.951.901.851.8068342819402520102019181733191390.7~0.80.8~0.90.9~1.126~2930~3435~4022.5~26.41.901.851.758241366030251817162816110.8~0.90.9~1.130~3435~4026.5~30.41.851.759447653516152414注：①平均比重采取：砂——2.66；粘砂土——2.70；砂粘土——2.71；粘土——2.74；②粗砂和中砂的E0值适用于不均匀系数Cu=

7、=3者，当Cu＞5时应按表中所列值减少。Cu为中间值时E0值按内插法确定；③对于地基稳定计算，采用人摩擦角φ的计算值低于标准值2°。三、土的压缩模量一般范围值土的压缩模量一般范围值，见表3-3-3-。土的压缩模量一般范围值表3-3-30土的名称压缩模量Es(MPa)卵石土54~65碎石土29~65砾石土14~42粗砂36（中实）~48（密实）中砂31（中实）~42（密实）细砂稍湿25（中实）~36（密实）潮湿及饱和19（中实）~31（密实）粉砂（淤泥）稍湿17（中实）~21（密实）潮湿14（中实）~17.5（密实）饱和9（中实）~14（密

8、实）砂粘土半干硬16（中实）~39（密实）可塑4（中实）~16（密实）粘土半干硬16（中实）~59（密实）可塑4（中实）~16（密实）注：砂粘土7＜Ip≤17；粘土Ip＞17四、粘性土剪强度参