土的經(jīng)驗參數(shù)(物理指標、壓縮、變形模量、剪切強度)

有關(guān)土的經(jīng)驗參數(shù)一、原狀土物理性質(zhì)指標變化范圍原狀土物理性質(zhì)指標變化范圍，見表3-3-28。原狀土物理性質(zhì)指標變化范圍表3-3-28指標礫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(％)14.9T8.011.3~33.915.4~79.424.7~86.9天然孔隙比0.277~0.6220.308T.2690.413~1.9620.803~2.240最小孔隙比0.200~0.4590.206~0.8880.337~1.2750.391T.848最大孔隙比0.500~1.0000.589T.8720.672~2.2240.958~2.864飽和度0.44~0.950.52~1.000.65~1.000.68~1.00液限————18~3626~68塑限一一15~1916~52注：粘砂土3V/W7；砂粘土7V/W17pP二、土的平均物理、力學(xué)性質(zhì)指標，見表3-3-29土的平均物理、力學(xué)性質(zhì)指標，見表3-3-29。土的平均物理、力學(xué)指標表3-3-29土類孔隙比e天然含水量W(%)塑限含水量w(%)p密度P(g/cm3)凝聚力(kpa)內(nèi)摩擦角?(°)變形模量E0(MPa)標準的計算的0.4~0.515~18一2.05204246粗砂0.5~0.619~22一1.951040400.6~0.723~25一1.900038330.4~0.515~18一2.05304046中砂0.5~0.619~22——1.95203840砂0.6~0.723~251.90103533類0.4~0.515~182.05603837土細砂0.5~0.619~22一1.954036280.6~0.723~25——1.902032240.5~0.615~18一2.05853614粉砂0.6~0.719~22一1.956334120.7~0.823~25一1.90422810

土類0.4~0.515~182.100.5~0.619~22<9.42.000.6~0.723~251.950.4~0.515~182.100.5~0.619~229.5~12.42.000.6~0.723~251.95孔隙比e天然含

水量W（%）塑限含水量

w（%）p密度P(g/cm3)1012凝聚力（kpa）標準的計算

的302827252423內(nèi)摩擦

角?（°）181411231613變形模量E0(MPa)0.4~.50.5~0.60.6~0.70.7~0.80.5~0.60.6~0.70.7~0.80.8~0.90.9T.00.6~0.70.7~0.80.8~0.90.9~1.00.7~0.80.8~0.90.9T.10.8~0.90.9T.115T819~2223~2526~2919~2223~2526~2930~3435~4023~2526~2930~3435~4026~2930~3435~4030~3435~402.104225244512.5~15.415.5~18.418.5~22.422.5~26.426.5~30.42.001.951.902.001.951.901.851.801.951.901.851.801.901.851.751.851.752114502519116834281982413694471510351510402520土類0.4~0.515~182.100.5~0.619~22<9.42.000.6~0.723~251.950.4~0.515~182.100.5~0.619~229.5~12.42.000.6~0.723~251.95孔隙比e天然含

水量W（%）塑限含水量

w（%）p密度P(g/cm3)1012凝聚力（kpa）標準的計算

的302827252423內(nèi)摩擦

角?（°）181411231613變形模量E0(MPa)0.4~.50.5~0.60.6~0.70.7~0.80.5~0.60.6~0.70.7~0.80.8~0.90.9T.00.6~0.70.7~0.80.8~0.90.9~1.00.7~0.80.8~0.90.9T.10.8~0.90.9T.115T819~2223~2526~2919~2223~2526~2930~3435~4023~2526~2930~3435~4026~2930~3435~4030~3435~402.104225244512.5~15.415.5~18.418.5~22.422.5~26.426.5~30.42.001.951.902.001.951.901.851.801.951.901.851.801.901.851.751.851.7521145025191168342819824136944715103515104025201060302565352322212221201918201918171817161615211512391815133319132816112414注：①平均比重米取：砂2.66；粘砂土2.70；砂粘土2.71；粘土2.74；②粗砂和中砂的E值適用于不均勻系數(shù)C=d30者，當(dāng)05時應(yīng)按表中所列值減少。C為2中間值0uuu10時E值按內(nèi)插法確定；0③對于地基穩(wěn)定計算，采用人摩擦角?的計算值低于標準值2°。三、土的壓縮模量一般范圍值土的壓縮模量一般范圍值，見表3-3-3-。土的壓縮模量一般范圍值表3-3-30土的名稱壓縮模量E（MPa）卵石土s54~65碎石土29~65礫石土14~42粗砂36（中實）~48（密實）中砂31（中實）~42（密實）細砂稍濕25（中實）~36（密實）潮濕及飽和19（中實）~31（密實）

粉砂（淤泥）稍粉砂（淤泥）稍濕17（中實）~21（密實）潮濕14（中實）~17.5（密實）飽和9（中實）~14（密實）半干硬16（中實）~39（密實）可塑4（中實）~16（密實）半干硬16（中實）~59（密實）可塑4（中實）~16（密實）注：砂粘土7</pW7；粘土Ip>17四、粘性土剪強度參考值粘性土抗剪強度參考值，見表3-3-31。粘性土抗剪強度參考數(shù)值表3-3-31名IL稱?(°)C(kpa)---一粘砂土砂粘土粘土粘砂土砂粘土粘土<028252220601000~0.252623201540600.25~0.502421181025400.50~0.75201714515200.75~1.001813821010>1.00<14<10<61<5<5注：粘砂土3</pW7；砂粘土7<仃壬7；粘土/>17五、土的側(cè)壓力系數(shù)（￡）和泊松比（u）參考值土的側(cè)壓力系數(shù)2和泊松比U參考值表3-3-32土的種類和狀態(tài)Cu碎石土砂土0.18~0.330.15~0.25粉土0.33~0.430.25~0.30粉質(zhì)粘土0.430.30堅硬狀態(tài)0.330.25可塑狀態(tài)0.430.30軟塑或流動狀態(tài)0.530.35粘土0.330.25堅硬狀態(tài)0.530.35可塑狀態(tài)0.720.42軟塑或流動狀態(tài)注：粘土I〉17；粉質(zhì)粘土10VIW17；IW10ppp五、變形模量于壓縮模量的關(guān)系變形模量E0是指土體在無側(cè)限條件下應(yīng)力與應(yīng)變之比，其中的應(yīng)變包含彈性應(yīng)變和塑性應(yīng)變兩部分。因此，變形