土力学习题答案

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土力学答案1-10解:02040608010012020.50.250.10.050.020.010.0050.002土粒粒径/mm小于某粒径的土重含量/%甲土乙土颗粒级配曲线甲土:60100.2424100.01udCd级配良好乙土:23010601.75cdCdd级配良好2-2解:根据题意,得:372.4932.541.8421.7mgcmV72.4961.2839%61.2832.54wsmm361.2832.541.3221.7sdmgcmV11.211.06910.49vwwswwVmeVVm2-3解:sVWsatmVVsWmmmWsmm设1sm则1VssSWmdV1sssWsWmVdd饱和密度:1111WsWsatd=11Wsd=1111Wsd=11sWsdd=31.852.71111.8710.342.71gcm有效密度:sSWmVV=sSWVWVWmVVVV=SVWsatVVV=1.8710.87satW3gcm有效重度:30.87108.7gkNcm2-4解:设1SV则VVe1Ve1111sWsWssdmmmmmVeee11sWde10.0982.67110.6561.77maxmaxmin0.9430.6560.5950.9430.461reeDee1323rD中密2-5解:根据题意,得:0.302.730.819VWsSWsSWSWVdVedVV32.7311.50110.819ssWdmdgcmVe3110.302.7311.951110.819sWsVWsWsWsatdmVddgcmVee331716PLPI1017PI查表2-24可知为粉质粘土30170.8116PLPII0.751.0LI查表2-3可知为软塑状态11-6解:击实曲线根据上图所示来确定:最优含水量为:18.8%最大干密度为:1.993gcm3-8解:(1)如下图所示:22121260hhkAkALL整理得:1121112606021040210110khcmkk所以,测压管中水面将升至右端水面以上:60-40=20cm(2)13222222401102002040hqkiAkAcmsL3-9解:2271.6206.5107.58.3604QLkcmsAht3-10解:2512120.441454lnln1.41030445100aLhkcmsAtth4-8解:(1)求有效重度111SSWS由上式得:329.19kNm338.20kNm349.71kNm(2)求自重应力分布1111.51725.5chkPa11225.5190.535.0chhkPa水224359.193.567.17cchkPa水3233h67.178.208132.77cckPa4344h132.779.713161.90cckPa4w43.583306.9cckPa不透水4-9解:(1)求偏心距e1.31FGeF1.316800.89168042220em(2)max22680422030143320.89122FGpkPalbe(3)平均基底压力max301150.522pkPa4-10解:(1)基地压力12002042.41.214942.4FGpkPaA(2)基地附加应力0149181131mppdkPa(3)附加应力M1点分成大小相等的两块2.4lm2bm1.2lb3.61.82zb查表4-5得0.108c120.10813128.31MkPaM2点作延长线后分成2大块、2小块6lm2bm3lb大块:3.61.82zb查表4-5得0.143c3.6lm2bm1.8lb小块:3.61.82zb查表4-5得0.129c202p20.1430.1291313.7McckPa大小4-11解:0200100150k2pPa均(1)中点下:0xm3zm0xb1.5zb查表4-10得0.396sz0.39615059.4zkPa6m处:0xm6zm0xb3zb查表4-10得0.208sz0.20815031.2zkPa(2)边缘:梯形分布的条形荷载看作矩形和三角形荷载的叠加3m处:矩形分布的条形荷载0.5xb1.5zb查表4-10得0.334sz0.33410033.4zkPa矩三角形分布的条形荷载l10b1.5zb查表4-8得10.0734t20.0938t10.07341007.34zkPa三角形0.09381009.38zkPa三角形2所以,边缘左右两侧的z为:133.47.3440.74zkPa233.49.3842.78zkPa6m处:矩形分布的条形荷载0.5xb3zb查表4-10得0.198sz0.19810019.8zkPa矩三角形分布的条形荷载l10b3zb查表4-8得10.0476t20.0511t10.04761004.76zkPa三角形0.05111005.11zkPa三角形2所以,边缘左右两侧的z为:119.84.7624.56zkPa219.85.1124.91zkPa5-10解:00.20.40.60.811.20100200300400500垂直压力/kPa孔隙比土样3-1土样3-2土样3-1:1120.7700.736a0.340.20.1eMPap1120.1a0.5MPa中压缩性土土样3-2:1120.8900.803a0.870.20.1eMPap112a0.5MPa高压缩性土

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