地基土均勻性及穩(wěn)定性分析

第一節(jié)地基土均勻性及穩(wěn)定性分析根據(jù)本次勘察資料，地基土豎向成層分布，部分層位水平方向上分布不連續(xù)，水平方向上厚度變化較大，部分層位水平方向頂(底)板埋深有所起伏，主要表現(xiàn)在：1、人工填土層(Qml)雜填土(①)呈雜色，松散狀態(tài)，由磚塊、灰渣、廢土、建1筑垃圾等組成，分布不穩(wěn)定，僅局部分布；素填土(①)呈褐黃色，軟塑?可塑狀態(tài)，2無層理，含鐵質(zhì)，屬中(偏高)壓縮性土，厚度有所變化。填墊年限小于十年。2、新近沖積層(Q3Nal)黏土(③)土質(zhì)尚均勻，分布不甚穩(wěn)定，厚度有所變化，局41部缺失。3、全新統(tǒng)下組沼澤相沉積層(Qih)水平方向上土質(zhì)尚均勻，砂粘性變化較大，局4部夾粉土，分布較穩(wěn)定。4、全新統(tǒng)下組陸相沖積層(Q：al)⑧】亞層分布不甚穩(wěn)定，局部缺失，⑧2亞層分布尚穩(wěn)定，各亞層厚度變化大。5、上更新統(tǒng)第五組陸相沖積層(Qeal)土質(zhì)較均勻，⑨亞層分布尚穩(wěn)定，局部缺31失；⑨亞層分布較穩(wěn)定，厚度變化較大；⑨亞層分布不穩(wěn)定，部分區(qū)域缺失。235、上更新統(tǒng)第三組陸相沖積層(Q『al)本層土在揭示范圍內(nèi)土質(zhì)尚均勻，@1亞層分布不穩(wěn)定，部分區(qū)域缺失，@2、@3亞層分布尚穩(wěn)定。本場(chǎng)地地基土水平方向上各亞層砂粘性有所變化，厚度有所變化，但對(duì)整體而言，地基土分布及性質(zhì)尚均勻、穩(wěn)定，整體認(rèn)為地基土是較均勻、穩(wěn)定的。第二節(jié)2.4物理力學(xué)指標(biāo)統(tǒng)計(jì)2.4.1一般物理力學(xué)指標(biāo)統(tǒng)計(jì)當(dāng)子樣個(gè)數(shù)N6時(shí)，提供最大值、最小值、算術(shù)平均值、標(biāo)準(zhǔn)差、變異系數(shù)、標(biāo)準(zhǔn)值及子樣個(gè)數(shù)；當(dāng)子樣個(gè)數(shù)V6時(shí)，僅提供最大值、最小值、算術(shù)平均值及子樣個(gè)數(shù)。各層土物理力學(xué)指標(biāo)統(tǒng)計(jì)結(jié)果如表2.4.1：最大值43.019.5最小值23.417.5平均值32.018.6（黏土）（黏土）（黏土）（粉土）標(biāo)準(zhǔn)差4.390.54變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值最大值最小值平均值標(biāo)準(zhǔn)差變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值最大值最小值平均值標(biāo)準(zhǔn)差變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值最大值最小值平均值0.1374733.1041.919.627.83.780.1368928.4955.927.540.25.830.14515341.0428.919.723.70.0294718.4620.118.119.40.430.0228919.3219.615.117.80.750.04215317.7020.818.919.81.0960.7610.9530.090.097470.980.9940.6330.8040.080.100890.821.5410.8161.1660.170.1421531.190.8040.5560.679WL(%)51.028.643.95.140.1174745.3251.227.640.05.130.1288940.9673.128.645.98.040.17515347.0333.423.628.7Ip26.611.621.12.980.144725.611.318.82.920.168939.711.621.94.660.2115310.07.58.90.510.210.330.090.270470.360.510.190.330.100.292890.351.100.310.730.150.2031530.750.680.200.420.810.280.540.110.212460.570.720.220.380.090.233850.401.060.350.710.150.2181390.730.260.080.146.32.63.80.770.203463.608.02.65.00.990.198854.826.01.63.10.670.2141393.0120.46.612.5變異系數(shù)0.0780.018子樣數(shù)9393標(biāo)準(zhǔn)值24.0319.74最大值35.420.6最小值20.217.5平均值26.019.6（粉質(zhì)黏土）（粉質(zhì)黏土）（粉土）標(biāo)準(zhǔn)差3.700.60變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值最大值最小值平均值標(biāo)準(zhǔn)差變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值最大值最小值平均值標(biāo)準(zhǔn)差變異系數(shù)子樣數(shù)標(biāo)準(zhǔn)值0.1420.031868626.6819.4932.921.620.525.93.680.14216626.4629.216.622.12.380.1083622.7917.919.60.720.03716619.5020.819.320.00.340.0173619.900.071930.690.9680.5750.7480.100.138860.770.9660.6070.7610.110.1461660.780.8410.5080.6420.060.093360.66WL(%)0.0657929.0648.824.732.95.180.1578633.8550.623.035.36.320.17916636.1438.723.128.24.150.1471530.11Ip0.077922.610.514.23.000.218623.510.215.73.500.2216617.97.49.93.160.32150.278790.440.820.270.540.140.253860.570.690.210.460.130.2871660.480.810.320.520.130.247150.580.242920.150.520.150.330.080.232830.340.560.090.340.080.2311560.350.180.090.120.020.194360.130.2179212.0210.83.95.61.180.211835.3818.13.65.41.390.2591565.2119.15.713.33.590.2693612.27

地層編號(hào)統(tǒng)計(jì)項(xiàng)目W(%)r(kN/m3)eWL(%)IpILa12(1/MPa)Es12(MPa)子樣數(shù)4747474747474646標(biāo)準(zhǔn)值24.9319.750.7335.82/0.420.305.81最大值26.821.50.78431.29.90.490.2022.9最小值15.218.60.44821.67.30.230.078.2?2平均值20.820.20.60826.78.70.360.1115.1（粉砂）標(biāo)準(zhǔn)差2.640.530.072.190.730.090.033.16變異系數(shù)0.1270.0260.1170.0820.080.2560.2470.209子樣數(shù)154154154303030150150標(biāo)準(zhǔn)值21.1620.130.6227.39/0.400.1114.66最大值34.620.81.01351.223.80.560.439.7最小值17.218.20.51625.210.70.200.182.9?3平均值25.419.80.73835.916.10.380.296.1（粉質(zhì)黏土）標(biāo)準(zhǔn)差3.510.520.105.573.110.100.051.12變異系數(shù)0.1380.0260.1340.1550.190.2800.1890.182子樣數(shù)1051051051051051059999標(biāo)準(zhǔn)值2.4.2標(biāo)貫指標(biāo)統(tǒng)計(jì)25.9819.710.7536.83/0.400.305.91靜力觸探試驗(yàn)提供錐尖阻力q「?jìng)?cè)摩阻力fs算術(shù)平均值，標(biāo)準(zhǔn)貫入擊數(shù)提供最大值、最小值、算術(shù)平均值、子樣數(shù)如表2.4.2：標(biāo)貫指標(biāo)統(tǒng)計(jì)表表2.4.2地層編號(hào)靜力觸探指標(biāo)標(biāo)貫試驗(yàn)擊數(shù)N錐尖阻力qc(kPa)側(cè)摩阻力fs(kPa)最大值（擊）最小值（擊）算術(shù)平均值(擊)子樣數(shù)687.055.686.02.04.318864.840.118.03.04.764@1603.017.597.02.04.397@36881.5139.2620.011.014.7751152.435.269.05.06.7571300.134.