巖土的物理力學(xué)性質(zhì)參數(shù)

力學(xué)性質(zhì)指標(biāo)巖土的物理力學(xué)性質(zhì)指標(biāo)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(diǎn)，選取與之有關(guān)的試樣進(jìn)行力學(xué)試驗(yàn)，測(cè)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(jiàn)表1至表7。表1部分巖石的容重石石名稱容重Y(g/cm3)石石名稱容重Y(g/cm3)變化范圍平均值變化范圍平均值-H-土U_i化岡石2.252.802.65泥質(zhì)砂巖—2.28響巖——粘土質(zhì)砂巖—2.52正長(zhǎng)巖2.503.002.79頁(yè)巖2.32.62.50流紋巖——砂質(zhì)貞巖2.082.652.36流紋斑巖2.492.632.60粘土質(zhì)貞巖2.512.722.65閃長(zhǎng)巖2.722.992.86泥質(zhì)貞巖—2.64黑云母花崗閃長(zhǎng)巖—2.60煤質(zhì)貞巖—2.63輝長(zhǎng)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?guī)r2.322.652.50斑巖2.602.892.67石灰?guī)r2.682.842.73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—玢巖——白云質(zhì)灰?guī)r—2.80蛇紋巖2.502.802.65泥質(zhì)灰?guī)r—2.30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(zhǎng)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?guī)r0.752.401.80板巖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

石石名稱孔隙率n（%吸水率31(%變化范圍平均值0.042.800.950.101.70花崗巖流紋斑巖閃長(zhǎng)巖1.103.402.000.141.651/申必111當(dāng)方甘當(dāng)崛止長(zhǎng)石女山石幺武石輝0.253.001.250.181.00綠巖霏細(xì)巖凝灰?guī)r火山2.540.48角礫巖安山凝灰集塊巖0.291.130.70礫巖砂巖砂巖（第三1.104.302.300.201.00紀(jì)）砂巖（白堊紀(jì)）砂1.700.300.801.002.20巖（侏羅紀(jì)）砂巖（三迭0.295.102.200.201.00紀(jì)）砂巖新鮮的風(fēng)化的1.592.231.800.180.35石英砂巖0.907.543.200.342.12石英砂巖新鮮的風(fēng)化的0.404.102.100.144.00頁(yè)巖砂質(zhì)貞巖2.005.103.200.401.005.041.049.3013.000.144.105.0020.0015.301.009.002.2042.0017.107.2037.7013.204.2024.6019.300.6027.7021.112.261.710.707.004.912.306.000.804.15

泥質(zhì)貞巖—1.35—煤質(zhì)貞巖—1.03—泥灰?guī)r1.0052.0018.001.005.00石灰石0.5327.0012.000.206.40石灰?guī)r（第二紀(jì)）—20.00—石灰?guī)r（中生代）1.2026.5011.65—石灰?guī)r（古生代）0.8027.0012.00—白堊5.0058.0026.40—石?0.104.001.70—硬石膏0.636.261.65—片麻巖0.302.401.350.140.30大理巖0.106.001.00—白云巖0.3025.007.70—石英巖0.008.702.400.020.28石英片巖1.532.802.000.100.30角閃石片巖—2.960.11云母片巖—0.790.080.42綠泥石片巖—2.100.551.12千枚巖—3.600.543.31板巖0.293.761.300.70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)1L含水量W（%液限W(%塑性指數(shù)IP下蜀系粘性土0.6~0.9V0.8152525401018一般粘性土0.551.001.015302545520新近沉積粘性土0.71.20.251.224363045648淤泥或游泥質(zhì)沿海1.02.0>1.0367030651025土內(nèi)陸山區(qū)云貴紅粘土1.01.90~0.4305050~90>17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（xi05Pa）壓縮模量E(x105Pa)內(nèi)聚力C(x105Pa)內(nèi)摩擦角（°）下蜀系粘性土30>80>1500.41.02230一般粘性土10>45401500.10.51522新近沉積粘性土8>1420750.10.2715淤泥或游泥質(zhì)土沿海4>1010500.050.15410內(nèi)陸5>112050山區(qū)3>81060云貴紅粘土10>32501600.30.8510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V1.2x10-6細(xì)砂1.2x1036.0x10-3亞粘土1.2x10-66.0x10-5中砂6.0x1032.4x10-2輕亞粘土6.0x10-56.0x10-4粗砂2.4x10'26.0x10-2黃土3.0x10-46.0x10-4礫砂6.0x10'21.8x10-1粉砂6.0x10-41.2x10-3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Y(x104N/m)內(nèi)聚力C(x105Pa)內(nèi)摩擦角（°）變形模量Eo(x105Pa)標(biāo)準(zhǔn)的計(jì)算的砂土粗砂0.4-0.5_15182.050.020424600.5-0.6_19221.950.010404000.6-0.7_23251.900038330中砂0.4-0.5_15182.050.030404600.5-0.6_19221.950.020384000.6-0.7_23251.900.01035330細(xì)砂0.4-0.5_15182.050.060383700.5-0.6_19221.950.04036280°.6-0.7_23251.900.02032240粉砂0.5-0.6_15182.050.080.0536140

0.60.719221.950.060.03341200.70.823251.900.040.0228100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W(%容重Y(X104N/m3)內(nèi)聚力C(X105Pa)內(nèi)摩擦角0(°)變形模量Eo(X105Pa)標(biāo)準(zhǔn)的計(jì)算的粘性土亞粘土輕亞粘土0.4-0.5_1.5182.100.100.06301800.5-0.6—1.922V9.42.000.070.05281400.6-0.7—2.3251.950.050.02271100.4-0.5—1.5182.100.120.07252300.5-0.6—1.9229.512.42.000.080.05241600.6-0.7—2.3251.950.060.0323130粘土0.4-0.5—1.5182.100.420.25244500.5-0.6—1.92212.515.42.000.210.15232100.6-0.7—2.3251.950.140.10221500.7-0.8—2.6291.900.070.05211200.5-0.6—1.9222.000.500.35223900.6-0.7—2.3251.950.250.15211800.7-0.8—2.62015.518.41.900.100.10201500.8-0.9—3.0341.850.110.0319130_爵-1.03.5401.800.080.0518800.6-0.7—2.3251.950.680.40203300.7-0.8—2.62918.522.41.900.340.2519190粘土0.8-0.9—3.0341.850.280.2018130_爵-1.03.5401.800.190.1017900.7-0.8—2.6291.900.820.60182800.8-0.9—3.03422.526.41.850.410.30171600.9-1.1—3.5401.750.360.25161100.8-0.9—3.03426.530.41.850.940.65162400.9--1.13.5401.750.470.3515140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。Eo值2.粗砂與中砂的Eo值適用于不均系數(shù)Cu=3時(shí)，當(dāng)Cu>5時(shí)應(yīng)按表中所列值減少2/3。CuEo值按內(nèi)插法確定。3.對(duì)于地基穩(wěn)定計(jì)算，采用內(nèi)摩擦角0的計(jì)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(jiàn)表8至表25。表8巖石力學(xué)性質(zhì)指標(biāo)的經(jīng)驗(yàn)數(shù)據(jù)(一)

巖類石類巖石名稱容重Y(g/cm)3抗壓強(qiáng)度Fb(x105Pa)抗拉強(qiáng)度Rt(x105Pa)靜彈性模量E(x105Pa)動(dòng)彈性模量(x105Pa)2.632.73750110021335.07.01.4_-5.6-H-土U_i化岡石2.803.101200180034517.19.15.436.93.103.301800-2000_51579.1~9.42.523285.47.0800100012001.5正長(zhǎng)巖2.72.8--1800345111.47.19.1l_LJ石M-l2.83-31800-2500_51579.4711.4漿2.52.91200-200034577.1~9.4閃長(zhǎng)巖_2.211.4l_LJ石M-I2.93.32000"2500057719.411.4斑巖2.81600546.6_-7.03.6安山巖2.52.71200-160034157.18.6_4.310.6玄武巖2.73.31600-2500_45718.611.42.71600-180045518.69」輝綠巖_6.9_-7.92.92000-2500_57719.411.4流紋巖2.53.31200-2500_34712.211.47.111.4花崗片麻巖2.72.91800-2000_51577.3_-9.49.1~9.42.5800100022285.07.0片麻巖1.5_-7.02.62.81400-1800_40517.89.12.61870255.6石英巖4.514.22.83.02000-3600_571029.414.2大理巖2.53.3700140020401.0_745.08.2千枚巖2.53.31200-140034402.203.47.17.8變_板巖凝灰?guī)r2.53.31200-250034712.211.47.111.4質(zhì)_火山角礫巖2.53.31200-250034711.011.47.111.4l_LJ石_M-I火山集塊巖2.22.5400100011283.37.0礫巖2.82.91200-1600_34451-011.47.18.616002.93.3_-250045718.611.4石英砂巖2.6、2.71680102519300.30_-1.255.0~6.41.21.545100230.0005_7.00230.51.0砂巖2.23.0470180014522.785.43.79.12.76800130022386.158片狀砂巖碳2.23.0500140015410.62.247.8質(zhì)砂巖碳質(zhì)2.02.625080018562.65.52.85.4頁(yè)巖黑頁(yè)巖2.71660130047912.65.55.07.5帶狀頁(yè)巖1.551.6560804~60.00050.00250.70.9砂質(zhì)貞巖2.32.6600120043862.03.64.47.1云母頁(yè)巖軟頁(yè)巖1.82.0200141.33.11.9頁(yè)