东北湿陷性黄土湿陷性的初探

东北湿陷性黄土湿陷性的初探1湿陷性黄土的分布特征东北黄土较少，黄土厚度也较小。东北的黄土分布在松辽平原及丘陵地区，黄土多为马兰黄土，形成时代为上更新世。分布于松辽平原上的黄土，主要分布于次级地貌单元—波状平原上。分布于波状平原上的黄土不是典型黄土，多为次生黄土，黄土的典型特征不是较明显，也具备了黄土的某些特征，但其孔隙不大（较典型黄相比），湿陷也相对较小，地表无较大的冲沟，多数不具有自重湿陷性。局部地区湿陷性也较明显。丘陵区（主要为辽宁省西部丘陵区和内蒙古自治区赤峰市丘陵区）主要分布于丘陵区的山麓地带，也有分布于山前、低丘陵顶部及河流二级阶地上。其厚度也不大，一般10m左右。这个地区的黄土，一般孔隙较大，湿陷性也较大，较大部分具有自重湿陷性，具有结构疏松，大孔隙，垂直节理发育特点。赤峰以东，局部冲沟发育；赤峰以西冲沟较发育，但没有形成典型的黄土地貌。本地区的冲沟一般深度较深，十米至十几米，宽度较小，一般10m左右，沟壁较陡，几乎近于垂直。丘陵区的黄土岩性多为粉砂及粉土，平原区的黄土多为粉土及粉质粘土。黄土分布地区的地形特征一般都冲沟较发育，地形局部起伏较大，这样的地区黄土湿陷性较明显，一般具有自重湿陷性；地形起相对较小，冲沟不发育地区的黄土湿陷性不明显，不具自重湿陷性。2湿陷性黄土的成因黄土的成因有风积和流水作用两种成因，一般认为典型的黄土为风积黄土，次生黄土为流水作用形成的黄土。风积土是指在干旱的气候条件下，岩石的风化碎屑物被风吹扬，搬运一段距离后，在有利的条件下堆积起来的一类土。颗粒主要由粉粒或砂粒组成，土质均匀，质纯，孔隙大，结构松散。最常见的是风成砂及风成黄土，风成黄土具有强湿陷性。次生黄土为原生黄土经过流水作用而再堆积的黄土，经过流水作用后原生黄土的结构遭到了破坏，原来的大孔隙变的较小，由于孔隙变小，其湿陷性也相对变小，大多数黄土已不具有自重湿陷性。只有少数地区具有自重湿陷性。一般认为辽西、赤峰地区的黄土为原生黄土，波状平原及其他的黄土为次生黄土。3湿陷性黄土的物理力学性质3.1波状平原上黄土的物理力学性质波状平原地形较平坦、波状起伏，微地貌单元无小型冲沟、陡坎等，一般土无湿陷性，少数具有轻微湿陷性。哈尔滨南某变电站资料（土试样取自探井）：土的物理性质指标表编号天然含水量W（%）天然重度r(kN/m3)天然孔隙比e饱和度Sr(%)液限WL(%)塑限WP(%)土的名称#1-124.719.10.76387.429.218.1粉质粘土#1-227.717.90.91281.429.319.5粉土#1-326.916.41.08966.730.419.9粉质粘土#2-124.719.50.71492.729.219.3粉土#2-230.017.80.97283.331.519.1粉质粘土#2-325.816.21.08164.029.219.3粉土#3-123.419.60.68791.329.820.4粉土#3-227.418.50.84686.830.221.1粉土#3-324.316.31.05962.029.619.5粉质粘土#4-124.718.70.80083.429.718.9粉质粘土#4-226.819.00.80290.229.819.2粉质粘土#4-328.217.11.02474.431.520.4粉质粘土#5-123.819.70.69792.229.818.5粉质粘土#5-229.118.30.89187.530.220.2粉土#5-326.418.10.88680.530.119.5粉质粘土#5-425.217.20.96570.530.419.6粉质粘土#6-122.019.70.67288.429.318.5粉质粘土#6-221.919.70.67188.128.818.6粉质粘土#6-324.719.50.71492.728.019.8粉土#6-424.619.60.70493.629.219.5粉土#6-526.717.20.97473.529.520.3粉土#6-626.717.40.95175.229.420.9粉土土的力学性质指标表编号压缩系数a1-2(MPa-1)压缩模量Es(MPa)内摩擦角φ（°）内聚力C（KPa）湿陷系数δs土的名称#1-10.1610.921.3110.0020粉质粘土#1-20.267.2321.870.0015粉土#1-30.633.2618.8100.0025粉质粘土#2-10.198.9121.3100.0020粉土#2-20.692.817.7110.0010粉质粘土#2-30.563.6419.8110.0160粉土#3-10.1610.4321.3130.0005粉土#3-20.1710.6919.8130.0005粉土#3-30.862.3416.2110.0215粉质粘土#4-10.1611.0420.3130.0015粉质粘土#4-20.237.6720.3120.0015粉质粘土#4-30.424.7118.8100.0020粉质粘土#5-10.227.5920.3170.0010粉质粘土#5-20.434.3119.8140.0010粉土#5-30.1710.9818.8130.0010粉质粘土#5-40.385.0018.8120.0005粉质粘土#6-10.1511.0020.3170.0015粉质粘土#6-20.1511.0222.3170.0005粉质粘土#6-30.189.3819.3170.0005粉土#6-40.1610.5117.2190.0010粉土#6-50.652.990.0045粉土#6-60.411.6518.8140.0010粉土注：红色为具有湿陷性的土试样。此变电站位于波状平原上，位于哈尔滨南，地形较平坦，地势起伏较小，附近无冲沟及陡坎，因此土基本无湿陷性，只有个别土试样具有湿陷性，但其湿陷系数也较小。上述资料可知具有湿陷性的土物理性质异常的特点：土的天然重度小、孔隙比大、饱和度小等。其力学性质无明显的变化，只是压缩性相对较大。吉林省松原市西北某电厂资料（土试样取自探井）：土的物理性质指标表编号天然含水量W（%）天然重度r(kN/m3)天然孔隙比e饱和度Sr(%)液限WL(%)塑限WP(%)土的名称T1-110.915.00.99629.524.216.2粉土T1-217.016.10.96247.727.317.5粉土T1-315.415.60.99741.728.219.8粉土T1-46.416.60.72423.824.518.4粉土T1-56.116.70.71523.025.017.3粉土T2-115.115.11.05838.525.516.8粉土T2-214.815.80.96241.526.418.8粉土T2-311.715.80.90234.926.319.7粉土T2-410.015.90.86131.225.620.0粉土T2-513.414.81.06933.925.817.7粉土T2-611.616.60.80838.624.719.5粉土T2-716.515.90.97845.528.819.4粉土T3-19.215.00.97325.627.016.4粉质粘土T3-216.914.81.14140.229.218.2粉质粘土T3-319.414.41.24742.229.818.0粉质粘土T3-411.315.10.99030.824.014.3粉土T3-56.915.00.91720.226.220.1粉土T3-66.615.50.85020.922.816.4粉土T4-17.416.60.74726.824.015.0粉土T4-214.514.31.17033.630.019.3粉质粘土T4-316.115.21.07040.827.616.2粉质粘土T4-414.515.80.95740.926.417.6粉土T4-519.615.31.11847.531.720.0粉质粘土T4-616.615.81.00045.027.315.8粉质粘土T4-716.415.61.01543.627.419.6粉土土的力学性质指标表编号压缩系数a1-2(MPa-1)压缩模量Es(MPa)内摩擦角φ（°）内聚力C（KPa）湿陷系数δs自重湿陷系数δis土的名称T1-10.385.30.0640.045粉土T1-20.365.40.0390.018粉土T1-30.563.619.8220.0390.053粉土T1-40.443.916.2230.0170.016粉土T1-50.384.520.3150.0180.024粉土T2-10.962.217.2330.0220.006粉土T2-20.296.717.7140.0200.009粉土T2-30.267.418.8120.0110.008粉土T2-40.1910.013.0250.0050.000粉土T2-50.832.515.1250.0250.030粉土T2-60.384.818.3110.0140.010粉土T2-70.563.50.0400.017粉土T3-10.1711.817.2220.1150.061粉质粘土T3-20.623.416.7310.0700.036粉质粘土T3-30.653.415.9390.0700.025粉质粘土T3-40.692.90.0380.033粉土T3-50.1413.315.6220.0600.049粉土T3-60.1413.323.3430.0330.011粉土T4-10.218.312.4220.0190.008粉土T4-21.062.00.0190.035粉质粘土T4-30.912.313.0250.0610.042粉质粘土T4-40.267.40.0430.038粉土T4-50.802.60.0200.071粉质粘土T4-60.972.113.5180.0340.011粉质粘土T4-70.424.80.0190.016粉土此电厂也位于波状平原上，但厂址区地形起伏相对较大，局部有明显的陡坎，陡坎高度一般10m左右，陡坎一般近于直立，但冲沟不发育。基本都具有湿陷性，其湿陷系数也相对较大。上述资料可知具有湿陷性的土物理性质异常的特点：土的天然重度小、孔隙比大、饱和度小等，其土的饱和度均小于50%，且土的液性指数基本小于0。其力学性质无明显的变化，只是压缩性相对较大。从小区域的地形及微地貌上可判断地基土是否具有湿陷性，当地形平坦，无明显的陡坎。地形变化不大时，一般土不具有湿陷性或湿陷性较小，可在工程中不考虑地基土的湿陷；当地形起伏较大且有陡坎、冲沟发育时，一般土具有湿陷性，工程中必须对地基土的湿陷性作出评价，并采取一定的工程措施进行处理。3.2丘陵区黄土的物理力学性质丘陵区黄土多分布于山前、山麓、丘陵的缓坡、低缓的丘陵顶部等，地势起伏不大，地形具有一定的坡度，冲沟较发育。赤峰南某变电站资料（土试样取自探井）：土的物理性质指标表编号天然含水量W（%）天然重度r(kN/m3)天然孔隙比e饱和度Sr(%)液限WL(%)塑限WP(%)土的名称T01-116.117.80.77456.634.919.1粉质粘土T01-216.617.90.77258.334.518.8粉质粘土T01-316.018.20.74059.034.616.8粘土T01-415.017.80.75753.935.219.6粉质粘土T02-14.616.10.74116.622.317.0粉土T02-25.215.20.85516.322.617.0粉土T02-317.218.40.73963.535.017.8粘土T02-417.717.60.81958.834.518.6粉质粘土T03-116.512.11.62827.734.917.5粘土T03-216.617.30.83354.233.519.2粉质粘土T03-318.216.90.90954.635.017.8粘土T03-418.517.30.86358.333.417.9粉质粘土T04-118.118.10.77563.535.520.0粉质粘土T04-217.318.10.76361.732.917.8粉质粘土T04-320.017.30.88761.437.020.5粉质粘土T04-418.418.00.78963.435.220.5粉质粘土T05-117.317.60.81357.933.618.4粉质粘土T05-214.416.40.89743.634.118.1粉质粘土T05-315.617.10.83950.634.617.7粉质粘土T06-115.917.60.79154.734.519.1粉质粘土T06-214.517.60.77051.334.519.0粉质粘土T06-318.617.30.86558.534.018.0粉质粘土土的力学性质指标表编号压缩系数a1-2(MPa-1)压缩模量Es(MPa)内摩擦角φ（°）内聚力C（KPa）湿陷系数δs自重湿陷系数δis土的名称T01-10.1116.715.6350.0030.006粉质粘土T01-20.218.317.2380.0090.003粉质粘土T01-30.1511.812.4570.0040.002粘土T01-40.1214.315.7320.0060.007粉质粘土T02-10.1016.720.8200.0020.008粉土T02-20.1116.721.3150.0030.000粉土T02-30.1710.517.7400.0060.006粘土T02-40.0920.016.2360.0020.004粉质粘土T03-10.2510.514.2310.0020.006粘土T03-20.1611.117.7370.0090.005粉质粘土T03-30.454.317.2380.0300.016粘土T03-40.1512.515.6320.0070.009粉质粘土T04-10.355.115.6290.0250.015粉质粘土T04-20.266.916.2360.0110.008粉质粘土T04-30.238.317.7450.0110.003粉质粘土T04-40.315.717.7330.0050.008粉质粘土T05-10.1511.814.2310.0060.011粉质粘土T05-20.1810.514.7330.0120.005粉质粘土T05-30.493.816.7310.0340.016粉质粘土T06-10.296.314.2300.0350.008粉质粘土T06-20.325.514.2310.0070.004粉质粘土T06-30.286.714.7340.0160.011粉质粘土赤南某变电站地貌为丘陵区，变电站位于丘陵缓坡处，站址附近发育有冲沟，冲沟深度不大，地形起伏不大，且土质多为粉质粘土和粘土，多数土试样为非湿陷黄土，少数为湿陷性黄土。上述资料可知具有湿陷性的土物理性质指标变化不大，与其他非湿陷性的土的物理力学性无明显的区别。赤峰西某变电站资料（土试样取自探井）：土的物理性质指标表编号天然含水量W（%）天然重度r(kN/m3)天然孔隙比e饱和度Sr(%)液限WL(%)塑限WP(%)土的名称S1-118.515.21.11345.131.921.3粉质粘土S1-220.715.61.09751.134.122.0粉质粘土S1-319.715.71.06650.129.719.2粉质粘土S2-116.615.01.09940.829.720.0粉土S2-219.514.21.28141.333.021.0粉质粘土S2-318.616.10.98950.829.320.0粉土S2-421.715.71.09353.629.720.0粉土S3-123.614.61.30349.336.421.0粉质粘土S3-217.615.11.10343.130.120.0粉质粘土S3-321.915.61.11053.330.020.0粉土S3-419.416.20.97553.329.018.0粉质粘土S4-113.914.91.07235.231.020.4粉质粘土S4-214.815.70.98240.929.419.2粉质粘土S4-317.815.21.09344.030.520.5粉土S4-423.915.11.22452.934.823.2粉质粘土S5-119.815.21.13647.232.721.2粉质粘土S5-219.114.91.15844.530.220.1粉质粘土S5-322.216.11.05756.934.121.6粉质粘土S5-422.215.81.09654.934.122.0粉质粘土S6-122.114.81.23648.531.721.1粉质粘土S6-218.215.21.10744.530.820.5粉质粘土S6-316.414.91.10939.930.320.3粉土S7-126.014.01.44848.842.525.6粉质粘土S7-219.214.91.16844.530.419.3粉质粘土S7-320.016.01.03352.530.017.5粉质粘土土的力学性质指标表编号压缩系数a1-2(MPa-1)压缩模量Es(MPa)内摩擦角φ（°）内聚力C（KPa）湿陷系数δs自重湿陷系数δis土的名称S1-10.992.1316.7160.0360.021粉质粘土S1-20.932.2519.3250.045粉质粘土S1-31.261.6417.7160.0510.022粉质粘土S2-10.9652.170.046粉土S2-21.1172.040.0750.015粉质粘土S2-30.3765.290.0390.013粉土S2-40.7222.900.0470.025粉土S3-11.481.550.0870.010粉质粘土S3-20.9982.110.0660.030粉质粘土S3-30.9762.160.0420.011粉土S3-40.6023.280.0580.020粉质粘土S4-10.573.618.3320.1180.009粉质粘土S4-20.277.419.3280.0410.009粉质粘土S4-30.623.40.0470.017粉土S4-40.952.418.8350.0510.011粉质粘土S5-11.101.9417.2170.0550.004粉质粘土S5-21.241.7417.7220.1050.051粉质粘土S5-31.091.9617.2190.0320.017粉质粘土S5-40.693.018.3210.033粉质粘土S6-11.371.618.3210.0410.013粉质粘土S6-21.072.015.6180.0830.023粉质粘土S6-31.082.018.3230.0670.037粉土S7-11.641.516.2170.0510.010粉质粘土S7-21.161.917.7260.0370.001粉质粘土S7-30.882.417.7240.031粉质粘土赤西某变电站地貌为丘陵区，变电站位于丘陵缓坡处，站址附近发育有冲沟，冲沟深度不大，地形起伏不大，且土质多为粉质粘土和粉土，多数土试样为非自重湿陷黄土，少数为自重湿陷性黄土。上述资料可知具有湿陷性土的天然重度小、天然孔隙比大、饱和度小的特点，其力学性质压缩系数大，为高压缩性的土。赤峰市乌丹某变电站资料（土试样取自探井）：土的物理性质指标表编号天然含水量W（%）天然重度r(kN/m3)天然孔隙比e饱和度Sr(%)液限WL(%)塑限WP(%)土的名称TL1-118.015.71.03747.029.518.5粉质粘土TL1-216.915.80.99845.727.618.5粉土TL1-317.015.61.02544.826.418.1粉土TL2-117.314.91.13341.431.821.0粉质粘土TL2-212.015.60.93834.526.217.0粉土TL3-110.815.00.99429.328.320.6粉土TL3-219.214.81.18344.030.319.3粉质粘土TL4-114.214.91.06935.928.618.9粉土TL4-219.214.91.16844.530.219.9粉质粘土TL5-118.315.11.12344.230.119.6粉质粘土TL5-29.816.20.82332.024.419.2粉土TL6-117.315.21.08443.128.518.6粉土TL6-215.515.70.98642.426.918.8粉土TL7-114.915.51.00140.227.718.3粉土TL7-220.716.01.04453.729.519.0粉质粘土TL8-116.415.11.08140.929.720.5粉土TL8-222.316.11.05957.130.820.7粉质粘土TL9-117.614.91.13142.029.520.8粉土TL9-216.015.21.09140.728.219.3粉土TL10-116.715.31.05942.629.620.3粉土TL10-216.215.41.03742.227.517.8粉土TL11-115.914.81.12238.429.518.7粉质粘土TL11-216.115.80.98444.226.818.0粉土TL12-111.715.20.98432.126.218.5粉土TL12-218.915.71.05248.730.119.6粉质粘土TL13-114.114.81.08235.229.220.1粉土TL13-215.115.80.96742.226.518.0粉土TL14-111.315.50.93232.623.817.7粉土TL14-220.715.51.11050.530.820.4粉质粘土土的力学性质指标表编号压缩系数a1-2(MPa-1)压缩模量Es(MPa)内摩擦角φ（°）内聚力C（KPa）湿陷系数δs自重湿陷系数δis土的名称TL1-10.375.60.0430.013粉质粘土TL1-20.375.40.0270.004粉土TL1-30.832.40.0340.014粉土TL2-10.3160.90.0450.006粉质粘土TL2-20.375.30.0420.007粉土TL3-10.1811.10.0710.011粉土TL3-20.445.00.0360.006粉质粘土TL4-10.346.10.0670.007粉土TL4-20.307.10.0510.007粉质粘土TL5-10.415.10.0500.005粉质粘土TL5-20.315.90.0360.002粉土TL6-10.673.10.0460.002粉土TL6-20.238.70.0150.007粉土TL7-10.365.60.0470.008粉土TL7-20.268.00.0650.004粉质粘土TL8-10.316.70.0560.005粉土TL8-20.229.50.0210.012粉质粘土TL9-10.693.10.0550.006粉土TL9-20.643.20.0490.022粉土TL10-10.326.50.0560.007粉土TL10-20.316.70.0600.012粉土TL11-10.673.20.0680.010粉质粘土TL11-20.732.70.0560.008粉土TL12-10.405.00.0470.017粉土TL12-20.504.10.0300.005粉质粘土TL13-10.326.50.0410.005粉土TL13-20.296.90.0320.026粉土TL14-10.1910.00.0180.007粉土TL14-20.405.30.03100.007粉质粘土赤峰乌丹某变电站地貌为丘陵区山前台地，变电站位于山前台地处，站址附近发育有冲沟，冲沟深度不大，地形起伏不大，且土质多为粉质粘土和粉土，多数土试样为非自重湿陷黄土，极少数为自重湿陷性黄土。上述资料可知具有湿陷性土的天然重度小、天然孔隙比大、饱和度小的特点，其力学性质无明显变化。综上，湿陷性较大的土多为粉质粘土和粉土，粉质粘土中Ip值多为小于11。湿陷性黄土物理性质特点为天然含量小、天然重度小、天然孔隙比大、饱和度小，饱和度多小于50%。4黄土湿陷性评价4.1湿陷性的判定哈尔滨南松原西北赤峰南赤峰西赤峰乌丹ds≥0.015个数22242327ds<0.015个数2031800湿陷性非湿陷性土湿陷性土湿陷性土湿陷性土哈尔滨南的两个试样的ds≥0.015但都小于0.03，湿陷性轻微，因此为非湿陷性土。松原西北多半其湿陷系数大于0.03，但基本小于等于0.07，湿陷性中等，为湿陷性的土。赤峰南局部具有湿陷性，且其湿陷系数接近于0.03。赤峰西黄土湿陷系数均大于0.03，少数大于0.07，湿陷性中等，局部湿陷性强烈。赤峰乌丹黄土湿陷系数大多大于0.03，少数小于0.03，湿陷性中等。4.2湿陷性黄土场地类型的判别哈尔滨南和赤峰南本身湿陷性就较小，不进行湿陷性场地类型的判别。湿陷性黄土场地类型的判别根据自重湿陷量来判别，当自重湿陷量Δzs小于等于70mm，为非自重湿陷性黄土场地；当自重湿陷量Δzs大于70mm，为自重湿陷性黄土场地。自重湿陷量Δzs的计算采用下式：计算时只有当自重湿陷系数大于等0.015才计算，因此赤峰西、赤峰乌丹的黄土自重湿陷系数大于等于0.015者较少，由此判断，这两处应为非自重湿陷性黄土场地。计算松原西北黄土自重湿陷量：探井T1自重湿陷量计算结果表土样编号取土深度（m）β0dzsihi(mm)Δzsi(mm)T1-13.20-3.400.500.045100022.50T1-24.00-4.200.500.0188007.20T1-35.00-5.200.500.053100026.50T1-46.00-6.200.500.01610008.00T1-57.20-7.400.500.024120014.40Δzs78.60Δzs大于70mm为自重湿陷场地。探井T2自重湿陷量计算结果表土样编号取土深度（m）β0dzsihi(mm)Δzsi(mm)T2-11.40-1.600.500.006400T2-22.40-2.600.500.0091000T2-33.40-3.600.500.0081000T2-44.40-4.600.500.0001000T2-55.40-5.600.500.030100015.00T2-66.40-6.600.500.0101000T2-78.00-8.200.500.017160013.60Δzs28.60Δzs小于70mm为非自重湿陷场地。探井T3自重湿陷量计算结果表土样编号取土深度（m）β0dzsihi(mm)Δzsi(mm)T3-11.40-1.600.500.06140012.20T3-22.40-2.600.500.036100018.00T3-33.40-3.600.500.025100012.50T3-44.40-4.600.500.033100016.50T3-55.40-5.600.500.049100024.50T3-66.40-6.600.500.0111000Δzs83.70Δzs大于70mm为自重湿陷场地。探井T4自重湿陷量计算结果表土样编号取土深度（m）β0dzsihi(mm)Δzsi(mm)T4-11.40-1.600.500.008400T4-22.40-2.600.500.035100017.50T4-33.40-3.600.500.042100021.00T4-44.40-4.600.500.038100019.00T4-55.40-5.600.500.071100035.50T4-66.40-6.600.500.0111000T4-77.40-7.600.500.01610008.00Δzs101.00Δzs大于70mm为自重湿陷场地。四个试验点有三个为自重湿陷场地，因此可按自重湿陷场地考虑。4.3湿陷性黄土地基的湿陷等级的判别判定湿陷性黄土地基的湿陷等级采用湿陷量和自重湿陷量联合判定。湿陷量Δs的计算采用下式：⊕计算松原西北黄土湿陷量：探井T1湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)T1-13.20-3.401.500.0641900182.40T1-24.00-4.201.500.03980046.80T1-35.00-5.201.500.039100058.50T1-46.00-6.201.500.017100025.50T1-57.20-7.401.500.0183008.101.0090016.20Δs337.50探井T2湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)T2-11.40-1.601.500.0221003.30T2-22.40-2.601.500.020100030.00T2-33.40-3.601.500.0111000T2-44.40-4.601.500.0051000T2-55.40-5.601.500.025100037.50T2-66.40-6.601.500.0141000T2-78.00-8.201.000.040160064.00Δs134.80探井T3湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)T3-11.40-1.601.500.11510017.25T3-22.40-2.601.500.0701000105.00T3-33.40-3.601.500.0701000105.00T3-44.40-4.601.500.038100057.00T3-55.40-5.601.500.060100090.00T3-66.40-6.601.500.033100049.50Δs423.75探井T4湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)T4-11.40-1.601.500.0191002.85T4-22.40-2.601.500.019100028.50T4-33.40-3.601.500.061100091.50T4-44.40-4.601.500.043100064.50T4-55.40-5.601.500.020100030.00T4-66.40-6.601.500.034100051.00T4-77.40-7.601.000.019100019.00Δs287.35通过计算可知，四个探井有两个湿陷量大于300mm，但都小于700mm，两个小于300mm。湿陷性黄土地基的湿陷等级为轻微至中等。⊕计算赤峰西黄土湿陷量：探井S1湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)S1-11.00-1.201.500.036S1-22.00-2.201.500.045100067.50S1-33.00-3.201.500.0511700130.05Δs197.55探井S2湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)S2-11.00-1.201.500.046S2-22.00-2.201.500.0751000112.50S2-33.00-3.201.500.039100058.50S2-44.00-4.201.500.04770049.35Δs220.35探井S3湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)S3-11.00-1.201.500.087S3-22.00-2.201.500.066100099.00S3-33.00-3.201.500.042100063.00S3-44.00-4.201.500.05870060.90Δs213.90探井S4湿陷量计算结果表土样编号取土深度（m）βdsihi(mm)Δsi(mm)S4-11.00-1.201.500.118S4-22.00-2.201.500.041100061.50S4-33.00