巖土的物理力學(xué)性質(zhì)指標(biāo)

1、巖土的物理力學(xué)性質(zhì)指標(biāo) 巖土的物理力學(xué)性質(zhì)指標(biāo)是邊坡的穩(wěn)定性計算的基本參數(shù)和重要依據(jù)。應(yīng)根據(jù)工程地質(zhì)劃分的扇形區(qū)及各區(qū)的邊坡變形破壞特點，選取與之有關(guān)的試樣進(jìn)行力學(xué)試驗，測定巖石及軟弱夾層物理力學(xué)性質(zhì)指標(biāo)。    巖石及軟弱夾層的物理性質(zhì)指標(biāo)詳見表1至表7。表1  部分巖石的容重巖石名稱容重（g/cm3）巖石名稱容重（g/cm3）變化范圍平均值變化范圍平均值花 崗 巖2.252.802.65泥質(zhì)砂巖2.28響    巖粘土質(zhì)砂巖2.52正 長 巖2.503.002.79頁    巖2.32.62

2、.50流 紋 巖砂質(zhì)頁巖2.082.652.36流紋斑巖2.492.632.60粘土質(zhì)頁巖2.512.722.65閃 長 巖2.722.992.86泥質(zhì)頁巖2.64黑云母花崗閃長巖2.60煤質(zhì)頁巖2.63輝 長 巖2.553.093.00粘 土 巖2.242.602.50橄 欖 巖砂質(zhì)粘土巖2.56石英斑巖2.562.632.60泥 灰 巖2.322.652.50斑    巖2.602.892.67石 灰 巖2.682.842.73粗 面 巖2.302.772.58貝殼灰?guī)r安 山 巖2.443.102.62硅質(zhì)灰?guī)r2.812.90玢  

3、0; 巖白云質(zhì)灰?guī)r2.80蛇 紋 巖2.502.802.65泥質(zhì)灰?guī)r2.30玄 武 巖2.603.212.90鹽    巖2.282.412.60輝 綠 巖2.533.122.94白    堊1.202.201.70硅長斑巖2.202.74石    膏安山凝灰集塊巖2.62花崗片麻巖2.303.202.8凝灰角礫巖2.202.90片 麻 巖2.593.002.78火山凝灰?guī)r1.601.951.80白 云 巖2.102.902.55凝 灰 巖0.752.401.80板    巖

4、2.602.902.75凝灰質(zhì)熔巖2.64大 理 巖2.692.872.78礫    巖1.902.802.35云母片巖2.542.972.73砂    巖2.452.722.60綠泥石片巖2.772.782.77粗 砂 巖2.57粘土質(zhì)片巖中 砂 巖2.60角閃石片巖2.673.052.90細(xì) 砂 巖2.65石 英 巖2.302.702.50粉 砂 巖2.59千 枚 巖2.712.862.78石英砂巖2.612.702.65表2  部分巖石的孔隙率與吸水率巖石名稱孔隙率n（%）吸水率1（%）變化范圍平均值花 崗 巖流紋斑巖

5、閃 長 巖正 長 巖安 山 巖玄 武 巖輝 綠 巖霏 細(xì) 巖凝 灰 巖火山角礫巖安山凝灰集塊巖礫    巖砂    巖砂巖（第三紀(jì)）砂巖（白堊紀(jì)）砂  巖（侏羅紀(jì)）砂  巖（三迭紀(jì)）砂  巖 新鮮的       風(fēng)化的石英砂巖石英砂巖 新鮮的         風(fēng)化的頁    巖砂質(zhì)頁巖泥質(zhì)頁巖煤質(zhì)頁巖泥 灰 巖石 灰 石石灰?guī)r（第三紀(jì)）石

6、灰?guī)r（中生代）石灰?guī)r（古生代）白    堊石    膏硬 石 膏片 麻 巖大 理 巖白 云 巖石 英 巖石英片巖角閃石片巖云母片巖綠泥石片巖千 枚 巖板   巖0.042.801.103.400.253.000.291.131.104.301.002.200.295.101.592.230.907.540.404.102.005.101.049.305.0020.002.2042.007.2037.704.2024.600.6027.700.707.000.804.151.0052.000.5327.001.202

7、6.500.8027.005.0058.000.104.000.636.260.302.400.106.000.3025.000.008.701.532.800.293.760.952.001.252.540.702.301.702.201.803.202.103.205.0413.0015.3017.1013.2019.3021.112.261.714.911.351.0318.0012.0020.0011.6512.0026.401.701.651.351.007.702.402.002.960.792.103.601.300.101.700.141.650.181.000.480.201

8、.000.300.800.201.000.180.350.342.120.144.000.401.000.144.101.009.002.306.001.005.000.206.400.140.300.020.280.100.300.110.080.420.551.120.543.310.70表3  不同成因粘土的有關(guān)物理力學(xué)性質(zhì)指標(biāo)（一）土     類孔隙比e液性指數(shù)IL含水量W（%）液限WL（%）塑性指數(shù)Ip下蜀系粘性土0.60.90.8152525401018一般粘性土0.551.001.015302545520新近沉積粘性土0.71.2

9、0.251.224363045648淤泥或游泥質(zhì)土沿海1.02.01.0367030651025內(nèi)陸山區(qū)云貴紅粘土1.01.900.43050509017表4  不同成因粘土的有關(guān)物理力學(xué)性質(zhì)指標(biāo)（二）土     類容許承載力R（×105Pa）壓縮模量E（×105Pa）內(nèi)聚力C（×105Pa）內(nèi)摩擦角（°）下蜀系粘性土30801500.41.02230一般粘性土1045401500.10.51522新近沉積粘性土81420750.10.2715淤泥或游泥質(zhì)土沿海41010500.050.15410內(nèi)陸51

10、12050山區(qū)381060云貴紅粘土1032501600.30.8510表5  幾種土的滲透系數(shù)表土    類滲透系數(shù)K（以cm/s）土    類滲透系數(shù)K（以cm/s）粘    土1.2×10-6細(xì)    砂1.2×10-36.0×10-3亞 粘 土1.2×10-66.0×10-5中    砂6.0×10-32.4×10-2輕亞粘土6.0×10-56.0&

11、#215;10-4粗    砂2.4×10-26.0×10-2黃    土3.0×10-46.0×10-4礫    砂6.0×10-21.8×10-1粉    砂6.0×10-41.2×10-3表6  土的平均物理、力學(xué)性質(zhì)指標(biāo)（一）土 類孔隙比e天然含水量W（%）塑限WP（%）容重（×104N/m3）內(nèi)聚力C（×105Pa）內(nèi)摩擦角（°）變形模量Eo（&#

12、215;105Pa）標(biāo)準(zhǔn)的計算的砂土粗砂0.40.515182.050.020424600.50.619221.950.010404000.60.723251.900038330中砂0.40.515182.050.030404600.50.619221.950.020384000.60.723251.900.01035330細(xì)砂0.40.515182.050.060383700.50.619221.950.040362800.60.723251.900.02032240粉砂0.50.615182.050.080.05361400.60.719221.950.060.03341200.70.82

13、3251.900.040.0228100表7  土的平均物理、力學(xué)性質(zhì)指標(biāo)（二）土    類孔隙比e天然含水量W（%）塑限WP（%）容重（×104N/m3）內(nèi)聚力C（×105Pa）內(nèi)摩擦角（°）變形模量Eo（×105Pa）標(biāo)準(zhǔn)的計算的粘性土亞粘土輕亞粘土0.40.51.5182.100.100.06301800.50.61.9229.42.000.070.05281400.60.72.3251.950.050.02271100.40.51.5182.100.120.07252300.50.61.9229.512.4

14、2.000.080.05241600.60.72.3251.950.060.0323130粘土0.40.51.5182.100.420.25244500.50.61.92212.515.42.000.210.15232100.60.72.3251.950.140.10221500.70.82.6291.900.070.05211200.50.61.9222.000.500.35223900.60.72.3251.950.250.15211800.70.82.62015.518.41.900.100.10201500.80.93.0341.850.110.03191300.91.03.5401.

15、800.080.0518800.60.72.3251.950.680.40203300.70.82.62918.522.41.900.340.2519190粘土0.80.93.0341.850.280.20181300.91.03.5401.800.190.1017900.70.82.6291.900.820.60182800.80.93.03422.526.41.850.410.30171600.91.13.5401.750.360.25161100.80.93.03426.530.41.850.940.65162400.91.13.5401.750.470.3515140 

16、60;  注：1.平均比重?。荷盀?.65；輕亞粘土為2.70；亞粘土為2.71；粘土2.74。        2.粗砂與中砂的Eo值適用于不均系數(shù)Cu=3時，當(dāng)Cu5時應(yīng)按表中所列值減少2/3。Cu為中間值時， Eo 值按內(nèi)插法確定。        3.對于地基穩(wěn)定計算，采用內(nèi)摩擦角的計算值低于標(biāo)準(zhǔn)值2°。    巖石及軟弱夾層的力學(xué)性質(zhì)指標(biāo)見表8至表25。表8  巖石力學(xué)性質(zhì)指標(biāo)的經(jīng)驗數(shù)據(jù)（一

17、）巖類巖石名稱容重（g/cm3）抗壓強度RC（×105Pa）抗拉強度Rt（×105Pa）靜彈性模量E（×105Pa）動彈性模量（×105Pa）巖漿巖花 崗 巖2.632.732.803.103.103.30750110012001800180020002133345151571.45.65.436.9 5.07.07.19.19.19.4正 長 巖2.52.72.82.83.3800100012001800180025002328345151571.511.45.47.07.19.19.411.4閃 長 巖2.52.92.93.31200200

18、0200025000345757712.211.47.19.49.411.4斑    巖2.81600546.67.03.6安 山 巖玄 武 巖2.52.72.73.31200160016002500341545714.310.67.18.68.611.4輝 綠 巖2.72.91600180020002500455157716.97.98.69.19.411.4流 紋 巖2.53.31200250034712.211.47.111.4變質(zhì)巖花崗片麻巖2.72.91800200051577.39.49.19.4片 麻 巖2.52.62.880010001400180

19、0222840511.57.05.07.07.89.1石 英 巖2.612.83.08702000360025571024.514.25.69.414.2大 理 巖2.53.3700140020401.03.45.08.2千 枚 巖板    巖2.53.31200140034402.203.47.17.8凝 灰 巖2.53.31200250034712.211.47.111.4火山角礫巖火山集塊巖2.53.31200250034711.011.47.111.4礫    巖2.22.52.82.92.93.3400100012001600160025