彭家槽滑坡抗滑桩治理方案设计计算书(共41页).docx

精选优质文档-倾情为你奉上本科毕业设计计算书题 目:三峡库区彭家槽滑坡抗滑桩治理方案设计学 院：_水利水电工程学院_ _ _专 业：_水利水电工程_ _学生姓名：_尹金山 _学 号：_年级_2011级_ _指导老师: _高明忠 _ _二一五年六月专心-专注-专业目 录1稳定性计算1.1MP法计算1.1.1原理M-P法是一种建立在极限平衡原理基础上的滑坡稳定性分析方法,1965年由Morgenstern和Price提出，故简称为M-P法。即是假设达到极限平衡状态时，土体将沿某一滑裂面产生剪切破坏而失稳，滑裂面上的各点，土体均处于极限平衡状态，满足摩尔-库仑强度条件。 （式1-1） （式1-2） （式1-3） （式1-4） (1-5)式中：K土坡沿某一滑动面的安全系数；t破裂面上的间应力；n破裂面上的法向应力；'n破裂面上的有效法向应力；c'、' 滑面土体的抗剪强度指标；ce' 、 e'考虑安全系数F换算后的抗剪强度指标；u作用于滑面上的孔隙水压力；Z浸润线到滑面中点的距离。M-P法能适合任意滑动面形状并且满足所有的力和力矩平衡： (式1-6) (式1-7)(式1-8) （式1-9） （式1-10） （式1-11）（式1-12）图1- 1 滑块受力简图在处理土条间的相互作用力时，假定X=Ef(x),其中X为土条间相互作用的切向力，E为土条间相互作用的法向力，f(x)是一个函数，沿滑动面连续变化，可将其假设为常数、半正弦波形、梯形等，为一尺度因子，对某一给定函数f(x)，的选择使得由满足力平衡所得的滑坡稳定安全系数和由满足力矩平衡所得的滑坡稳定安全系数相等，即Ff=Fm。本次设计是运用理正岩土6.0软件进行计算，其计算方法选择为M-P法。1.1.2计算模型建立采用规范为水电水利工程边坡设计规范 DL/T 53532006，计算目标：安全系数计算，由于滑床为细砂岩和青绿色泥岩，滑坡体为碎石粘土，故滑裂面形状取为折线形滑面。滑坡区地震烈度为度，根据规范，不考虑地震作用。地下水作用采用有效应力法计算，孔隙水压力采用近似方法计算，即认为孔隙水压力等于静水压力，u=Z,Z为块体中孔隙水深度，不考虑渗透力作用。计算剖面选择：根据彭家槽滑坡的地质勘察资料中的平面图和剖面图，选择经过滑坡中线附近的2-2剖面进行滑坡稳定性计算，原因是一般通过滑坡中线附近的滑面是较危险的滑面，选择较危险滑面进行稳定性计算，对工程是偏于安全的。模型轮廓的建立：在CAD中剖面的轮廓用命令line画好，利用命令dfxout将其另存为dfx文件，通过理正岩土边坡稳定性分析软件的辅助功能读入该dfx文件，即可完成坡面、土层轮廓的输入，相关物理物理参数见下表表1- 1 模型物理参数容重(kN/m3)饱和容重（kN/m3)粘聚力c（kPa）内摩擦角（°）滑带280高程以下816280高程以上1020滑体1921滑床2222.5建立好的自然工况下的计算模型如图1-2所示，久暴雨工况下如图1-3所示：图1- 2 自然工况计算模型图1- 3 久暴雨工况计算模型1.1.3计算结果模型建立好后，点击计算，结果如下表：表1- 2两种工况下的稳定性系数工况稳定性系数自然工况（工况一）1.032久暴雨工况（工况二）0.922计算过程中除能得到稳定性系数外，还能得到土条间力的相关曲线，如图1-4到1-7为工况一土条间力相关曲线：图1- 4 工况一土条底部法向力图1-5 工况一土条底部切向力图1-6工况一土条右侧法向力图1-7 工况一土条右侧切向力查询各土条信息，可得工况一各土条相关参数如表1-2，这些数据将在传递系数法计算稳定性中得到应用。从图1-4到图1-6，可以得到如下结论：图1-4和图1-5反映土条的下滑力特征，图1-6和图1-7反映条的滑坡推力特征，后者为前者的积分。其形状均呈马鞍形，符合彭家槽滑坡的地形特征，即三级平台地形：在一级平台首部，滑面坡度较陡，土层较深，滑面抗滑力不足以抵消下滑力，滑坡推力逐渐积累，故图1-6和图1-7均呈上升趋势，在一级平台尾部，土层较浅，滑面坡度较缓，滑面的抗滑力较下滑力大，滑坡推力逐渐减少，故图1-6和图1-7下降。在二级、三级平台又重复以上过程，但整个滑坡体滑坡推力的总体趋势为先升后降，滑体中部的推力及应力最大。表1- 3自然工况土条信息土条编号起始x(m)土条底长(m)土条底部倾角(度)土条底部粘聚力(kPa)土条底部内摩擦角(度)土条重(kN)孔隙水压力(kN)100.6510.89102011.6411.3120.641.7610.891020138.8130.2532.372.7810.891020409.3447.2745.14.1710.891020785.9269.8259.195.2210.8910201139.785.69614.3213.1810.8910203234.86207727.260.0610.89102015.580.92827.320.1810.89102046.582.76927.515.5417.5210203531.82233.661042.3219.6717.5210203632.43275.361161.090.2517.52102041.543.351261.320.5517.52102092.177.41361.8525.2416.5510204641.19364.721486.052.1317.041020428.5133.181588.090.2517.04102050.353.871688.3223.7617.0410204385.47358.3717111.04015.4510200.440.0418111.0416.8915.4510202922.61282.9519127.324.9415.451020905.6196.2820132.090.2515.45102046.74.9621132.3210.3815.4510201890.79203.1722142.3223.515.4510204034.32421.6523164.970.3614.29102061.516.1224165.3228.314.2910205529.8522.4625192.750.3413.48102076.816.9426193.090.2413.48102054.674.9327193.3241.4213.4810208467.65803.4628233.613.113.8210202334.21236.0329246.3214.1713.8210202240.71236.7630260.090.2513.82102035.473.9431260.326.813.8210201000.61117.1332266.932.1413.821020321.9839.9533269.01015.5610200.210.0334269.0120.0415.418163048.75389.0135288.3212.7315.418161970.88255.2236300.617.9114.688162858.19390.6637317.920.2414.6881639.725.7138318.16018.738160.450.0739318.163.3418.7816549.8480.5140321.3213.8118.78162443.01367.9241334.4112.821.458162327.25349.5842346.3217.8121.458163587.85427.4443362.92.3622.08816522.9951.144365.090.2622.0881657.665.4745365.3221.1722.088164451.9446.6746384.9412.3723.118162275.24242.5347396.3210.423.118161751.18178.7548405.8918.7321.478163034.81318.2149423.323.3121.47816530.6959.7550426.49.5921.358161603.76180.0351435.331.8621.35816322.9835.0952437.07014.048160.490.0553437.0711.614.028162216.21265.7454448.3217.2814.028164392.54593.2455465.090.2514.0281675.7410.1256465.3229.8914.0281610038.571393.3957494.3228.6114.0281610543.061633.1358522.08016.578160.990.1759522.089.6416.568163548.32595.260531.326.6516.568162437.08404.9561537.720.1818.38167258.091135.9862556.866.6720.948162304.75327.3663563.090.2520.9481686.911.7564563.3219.1320.948166024.71916.4965581.1926.223.258166266.851216.1366605.264.5326.4816811.69186.8667609.3215.0926.48162341.7497.9168622.8414.5831.168161609.47204.669635.320.8231.1681668.550.5870636.020.0131.178160.98071636.034.7831.16816345.5072640.128.9841.08816246.460工况二土条间力相关曲线如图1-8到1-11所示：图1- 8 工况二土条底部法向力曲线图图1-9工况二土条底部切向力曲线图图1-10工况二土条右侧切向力曲线图图1-11 工况二土条右侧法向力曲线图工况二土条相关参数如表1-4所示：表1-4工况二土条信息土条编号起始x(m)土条底长(m)土条底部倾角(度)土条底部粘聚力(kPa)土条底部内摩擦角(度)土条重(kN)孔隙水压力(kN)101.5110.89102062.2460.4521.490.910.89102094.1535.9332.372.7810.891020421.73110.3545.14.1710.891020804.5164.4359.195.2210.8910201163204.29614.313.1810.8910203293.61506.15727.30.0610.89102015.842.28827.30.1810.89102047.386.84927.515.5417.5210203599.11586.531042.319.6717.5210203717.61721.981161.10.2517.52102042.629.011261.30.5517.52102094.5619.981361.925.2416.5510204751.03937.671486.12.1317.041020437.7781.61588.10.2517.04102051.439.521688.323.7617.0410204488.59897.6717111015.4510200.450.11811116.8915.4510202996.53666.44191274.9415.451020927.23208.43201320.2515.45102047.7810.572113210.3815.4510201936.19438.692214223.515.4510204137.14955.03231650.3614.29102063.114.372416528.314.2910205654.321164.92251930.3514.44102078.3114.82261930.2514.44102055.7110.512719338.714.4410207832.191499.312823115.9212.8410202763.68563.042924614.1112.8410202220.87516302600.2412.84102035.769.08312604.2312.841020629.31162.14322644.6712.841020718.43189.4733269015.5610200.220.063426920.0415.418163136.44843.833528812.7315.418162026.61544.233630117.9114.688162936.83797.16373180.2414.6881640.7911.2438318018.738160.460.13393183.3418.7816564.21156.364032113.8118.78162502.41681.464133412.821.458162381.35640.224234617.8121.458163663.12831.78433632.3622.08816532.91104.6443650.2622.0881658.7411.34536521.1722.088164540.97927.244638512.3723.118162326.91523.434739610.423.118161794.62414.874840618.7321.478163113.95743.43494233.3121.47816544.67134.87504269.5921.358161644.29397.62514351.8621.35816330.8677.3952437014.048160.50.115343711.614.028162267.31529.065444817.2814.028164468.64985.42554650.2514.0281676.8215.695646529.8914.0281610170.232071.95749428.6114.0281610669.062282.4758522016.5781610.23595229.6416.568163590.28814.12605316.6516.568162466.02555.956153820.1818.38167345.061594625576.6720.948162333.03478.77635630.2520.9481687.9817.546456319.1320.948166105.821350.726558126.223.258166376.141810.95666054.5326.4816830.12289.736760915.0926.48162403.08840.536862314.5831.168161666.13535.66696355.6131.16816433.42108.03706403.9741.57816171.9828.63716434.8441.5781672.3901.2传递系数法计算1.2.1计算原理传递系数法的计算公式如(1-13)(1-16)： （1-13） （1-14） （1-15） （1-16）Fs-稳定系数Ri-作用于第i块段的抗滑力（kN/m）Ti-作用于第i块段滑面上的滑动分力（kN/m），出现与滑动面方向相反的滑动分力时，Ti取负值Rn-作用于第n块段的抗滑力（kN/m）Tn-作用于第n块滑动面上的滑动分力（kN/m）j-第i块段的剩余下滑力传递至第i+1块时的传递系数(j=i)Wi-第i块的重量（kN/m）i-第i块的滑面倾角li-第i块的滑带长度(m)ci-第i块的粘聚力（k批a）i-第i块的内摩擦角（°）1.2.2计算模型 图1-12 自然工况计算模型 图1-13久暴雨工况计算模型1.2.3计算结果自然工况下的计算结果如下表：表1-5 自然工况传递系数法计算结果安全系数K1.06763滑块号滑块重W(kN/m)滑带长l(m)粘聚力c(kPa)内摩擦角(°)滑面倾角(°)抗滑力R(kN/m)下滑力T(kN/m)抗滑力与下滑力之差(kN/m)传递系数推力F（kN/m）1246.468.982102041.084157.4172.9215.4810.9915.3722345.54.783102031.163156.4206.1349.7240.9245.86230.9790.012102031.1630.42450.26549.841149.841468.5480.816102031.16319.1687.71168.548168.54851609.514.58102031.163592.6947.54354.9511354.9562341.715.09102026.369806.71465.2658.4670.97636.137811.694.532102023.254255.41070.7815.3460.98798.0286266.826.2102023.25420003455.71455.39711455.496024.719.13102020.93919703752.91783.1580.981755.51086.8990.255102020.93928.361816.31787.95611788112304.86.67102020.939746.22667.31921.08111921.1127258.16.652102018.30323694352.61983.3020.981948132437.120.18102016.561803.327241920.7650.991898.6143548.39.644102016.56111353000.61865.28211865.3150.990.003102016.5610.3161865.61865.26711865.3161054328.61102014.0234804590.41110.670.981091.7171003929.89102014.0233663707.1340.6911340.691875.740.254102014.0225.73360.28334.5471334.55194392.517.28102014.0215211470.7-49.98310202216.211.6102014.02807.6523.23-284.32910210.4910.003102014.020.184-284.2-284.3861022322.981.863102021.351117125.548.5031.048.8284231603.89.585102021.351582.7631.949.222149.22224530.693.31102921278.1256.58-21.53510253034.818.7310292116001164.3-435.80810261751.210.4102023.108635.2733.7798.5461.0199.532272275.212.38102023.108810.71051.9241.1491241.15284451.921.17102022.07715752027.5452.2640.99449.232957.6580.257102022.07720.31475.4455.0931455.0930522.993.35781622.077184664.95480.9581480.96313587.917.8181621.455995.31882886.6651883.85322327.212.881621.455636.71795.51158.7711158.833244313.8181618.7695.41993.71298.3020.991278.934549.843.34281618.7155.41486.51331.14611331.1350.4480.00381618.70.1271331.31331.17211331.23639.7160.24381614.68238.181338.61300.4680.981271.1372858.217.9181615.409831.22073.91242.61211247381970.912.7381615.409574.11801.61227.47311227.5393048.72.03681615.409899.42092.31192.93511192.9400.2090.00181615.4090.06211931192.93211192.941321.982.13981613.817105.51274.61169.1010.991159.3421000.66.80381613.817301.41424.21122.85911122.94335.4680.24581613.81710.771131.91121.1311121.1442240.714.1781613.817673.31692.41019.16711019.2452334.213.181613.817690.91614.3923.3791923.38468467.641.4281613.48424763031.4555.1931554.264754.6740.24581613.48415.87568.8552.9381552.944876.8050.34581613.48422.3572.06549.7641549.76495529.828.381614.28816202006.8386.6491388.175061.5050.36481614.28818.35402.86384.5031384.5514034.323.581615.45411881532.1343.7111.01345.65521890.810.3881615.454551.5881.61330.1591330.165346.6980.24781615.45413.56343.44329.8841329.8854905.614.94181615.454264.2587.52323.3491323.35552922.616.8981615.454867.51154.8287.2611287.26560.4420.00381617.0410.133287.39287.2541.01289.43574385.523.7681617.04112961659.3363.1271363.135850.3460.24981617.04114.78378.88364.0991364.159428.512.13381617.041125.8498.17372.3241372.32604641.225.2481617.04113821784401.5721401.576192.1650.55481616.55325.75431.14405.3911404.396241.5410.2581616.55312.48418.75406.2611406.26633632.419.6881616.55310791573.9495.0841495.08643531.815.5581616.55310291630.4601.2411601.246546.5830.1881610.88933.71606.61572.8990.97553.896615.5760.0681610.8894.614576.04571.4271571.43673234.913.1881610.889959.11223.8264.7461264.75681139.75.22581610.889339494.6155.5681155.5769785.924.16881610.889235.3314.0778.73178.7370409.342.77981610.889124.4161.2836.864136.86471138.811.7681610.88944.8164.85820.053120.0537211.64