配线法分析抽水试验参数.doc

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1、配线法承压含水层多空抽水试验，抽水井稳定流量为60rn3/h,四个观测孔，用配线法求含水层参数。喪4.2抽水试验規测资料（pig14规2观15观10抽水井43»140m510»780«流jt/mW確深加隣深加深伽10600.730.160.040.0020601.280.48-■30601.530.54—-40601.720.650.06■60601.960.750.20■80602.141.000.200.04100602.281.120.20■I120602.391.220.210.08I150602.541.360.24

2、0.09I210602.771.550.400.16270602.991.700.530.25I330603.101.830.630.34400603.201.890.650.42I450603.261.980.730.50I645603.472.170.930.71870603.682.381.140.87990603.772.461.240.961185603.852.541.351.06一、降深-时间距离配线法1、选取抽水试验观测资料的“观15”号孔时间/min102030406080100120150210270330

3、4004506458709901185降深/ni0.160.480.540.650.7511.121.221.361.551.71.831.891.982.172.382.462.542、计算s对应的的t/『降深/rn0.160.480.540.650.7511.121.221.361.551.71.831.891.982.172.382.462.5410000*t/r25.110.215.320.430.640.851.061.276.5107.1137.816&4204.1229.6329.1443.9505.1604.6

4、3、绘制s・t/『曲线和W(u)-l/u曲线，并将横坐标平移使两条曲线重合(如下图)4、任意选取一匹配点A代入公式计算得:stW(u)1/u1.965210代入：T=Q[w(u)]/4Ji[s]=229.3.6m3/dS=4T[t/r2]/[l/u]=1.86*10-4二、降深-时间曲线1、选取抽水试验观测资料的“观2”号孔时间/min1020304060801001201502102703304004506458709901185降深/m0.731.281.531.721.962.142.282.392.542.772.99

5、3.13.23.263.473.683.773.852、绘制s-1曲线和W(u)-1/u标准曲线，并通过excel调整进行拟合(如下图)3、任意选取一匹配A点可得:1.9t76W(u)21/u10代入:T=Q[w(u)]/4n[s]=120.68m2/dS=4T[t]/r2*[l/u]=1.3*10-4三、直线图解法1、有上图可得:斜率等于0.75截距等于0.00062、代入：T=2.3Q/4nAs=351.6m2/dS=2.25T(t/r2)=3.3*IO'4