太沙基承载系数表优质资料.doc

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1、太沙基承载系数表优质资料(可以直接使用，可编辑 优质资料，欢迎下载）地基极限荷载是指地基土体完全发生剪切破坏时所承受的荷载，目前对于地基极限荷载的计算理论仅限于整体剪切破坏型式。对于局部剪切破坏及刺入剪切破坏，尚无可靠的计算方法，通常是先按整体剪切破坏型式进行计算，再作某种修正。极限荷载的求解有两类途径：一类是根据土体的极限平衡原理，另一类是根据模型试验。先假定在极限荷载作用时土中滑动面的形状，然后根据滑动土体的静力平衡条件求解极限荷载。这类方法又由于假设的滑动面形状不同，导出了多种形式的计算公式。 太沙基公式太沙基在1943年提出了确定条形浅基础的极限荷载公式。太沙基认为当基础的长宽比l/b

2、5及基础埋深db时，就可视为条形浅基，基底以上土体看作是作用在基础两侧的均布荷载q=d。太沙基假定基础底面是粗糙的，地基的滑动面形状如图7-4所示，可分为三个区：图7-4I区-基础底面下的土楔ABC，由于假定基底是粗糙的，具有很大的摩擦力，因此AB不会发生剪切位移，该区内土体处于弹性压密状态，它像一个“弹性核”随基础一起向下移动；II区-滑动面按对数螺旋线变化，在C点处螺旋线的切线垂直，D、E点处螺旋线的切线与水平线成45-/2角；III区-被动朗金区(底角与水平线成45-/2角的等腰三角形)。根据弹性土楔的静力平衡条件，可求得地基的极限荷载：式中：C-土的粘聚力，KPa；q-基础两侧土压力q

3、=0d，若地基土是均质，则基础两侧土压力q=d；若地基土是非均质，则0是基底以上土的加权平均重度；d-基底埋深，m；b-基础宽度，m；Nr、Nq、Nc-无量纲承载力系数，可根据内摩擦角从表7-2查出。以上公式只适用于地基土整体剪切破坏情况，即地基土较密实，其P-S曲线有明显的转折点，破坏前沉降不大等情况。对于松软土质，地基破坏是局部剪切破坏，沉降较大，其极限荷载较小。太沙基建议采用较少的，C值代入公式计算极限荷载，即得：此时极限荷载公式为：式中Nr、Nc、Nq是相应于局部剪切破坏情况的承载力系数，根据降低后的摩擦角查表7-2。表7-2 太沙基公式承载力系数表051015202530354045

4、Nr00.511.201.804.011.021.845.4125326Nq1.01.642.694.457.4212.722.541.481.3173.3Nc5.717.329.5812.917.625.137.257.795.7172.2上述公式只适用于条形基础，对方形和圆形基础，太沙基建议按下列修正公式计算地基极限荷载：方形基础：整体剪切破坏：局部剪切破坏：圆形基础：整体剪切破坏：局部剪切破坏：式中r为圆形基础的半径，其余符号同前。对于矩形基础(宽为b，长为l)，可近似按b/l值，在条形基础(b/l=0)与方形基础(b/l=1)的承载力之间用插入法求得。复利终值系数表(FVIF表) *

5、99999ni%12345678910111213141516171819202425283032361234567891011121314151617181920212223242526272829304050601.01001. 11.03031.04061.05101.06151.07211.08291.09371.10461.11571.12681.13811.14951.16101.17261.18431.19611.20811.22021.23241.24471.25721.26971.28241.29531.30821.32131.33451.34781.48891.64461.

6、81671. 01.04041.06121.08241.10411.12621.14871.17171.19511.21901.24341.26821.29361.31951.34591.37281.40021.42821.45681.48591.51571.54601.57691.60841.64061.67341.70691.74101.77581.81142.20802.69163.28101.03001.06091.09271.12551.15931.19411.22991.26681.30481.34391.38421.42581.46851.51261.55801.60471.65

7、281.70241.75351.80611.86031.91611.97362.03282.09382.15662.22132.28792.35662.42733.26204.38395.89161.04001.08161.12491.16991.21671.26531.31591.36861.42331.4802153951.60101.66511.73171.80091.87301.94792.02582.10682.19112.27882.36992.46472.56332.66582.77252.88342.99873.11873.24344.80107.106710.5201.050

8、01.10251.15761.21551.27631.34011.40711.47751.55131.62891.71031.79591.88561.97992.07892.18292.29202.40662.52702.65332.78602.92533.07153.22513.38643.55573.73353.92014.11614.32197.040011.46718.6791.06001.12361.19101.26251.33821.41851.50361.59381.68951.79081.89832.01222.13292.26092.39662.54042.69282.854

9、33.02563.20713.39963.60353.81974.04894.29194.54944.88235.11175.41845.743510.28618.42032.9881.07001.14491.22501.31081.40261.50071.60581.71821.83851.96722.10492.25222.40982.57852.75902.95223.15883.37993.61653.86974.14064.43044.74055.07245.42745.80746.21396.64897.11437.612314.97429.45757.9461.08001.166

10、41.25971.36051.46931.58681.71381.85091.99902.15892.33162.51822.71962.93723.17223.42593.70003.99604.31574.66105.03385.43655.87156.34126.84857.39647.98818.62719.317310.06321.72546.902101.261.09001.18811.29501.41161.53861.67711.82801.99262.17192.36742.58042.81273.06583.34173.64253.97034.32764.71715.141

11、75.60446.10886.65867.25797.91118.62319.399210.24511.16712.17213.26831.40974.358176.031.10001.21001.33101.46411.61051.77161.94872.14362.35792.59372.85313.13843.45233.79754.17724.59505.05455.55996.11596.72757.40028.14038.25439.849710.83511.91813.11014.42115.86317.44945.259117.39304.481.11001.23211.367

12、61.51811.68511.87042.07622.30452.55802.83943.15183.49853.88334.31044.78465.31095.89516.54367.26338.06238.94929.933611.02612.23913.58515.08016.73918.58020.62422.89265.001184.56524.061.12001.25441.40491.57351.76231.97382.21072.47602.77313.10583.47853.89604.36354.88715.47366.13046.86607.69008.61289.646

13、310.80412.10013.55215.17917.00019.04021.32523.88426.75029.96093.051289.00897.601.13001.27691.44291.63051.84242.08202.35262.65843.00403.39463.83594.33454.89805.53486.25437.06737.98619.024310.19711.52313.02114.71416.62718.78821.23123.99127.10930.63334.61639.116132.78450.741530.11.14001.29961.48151.689

14、01.92542.19502.50232.85263.25193.70724.22624.81795.49246.26137.13798.13729.276510.57512.05613.74315.66817.86120.36223.21226.46230.16734.39039.20444.69350.950188.88700.232595.91.15001.32251.52091.74902.01142.31312.66003.05903.51794.04564.65245.35036.15287.07578.13719.357610.76112.37514.23216.36718.82

15、221.64524.89128.62532.91937.85743.53550.06657.57566.212267.861083.74384.01.16001.34561.56091.81062.10032.43642.82623.27843.80304.41145.11735.93606.88587.98759.265510.74812.46814.46316.77719.46122.57426.18630.37635.23640.87447.41455.00063.80074.00985.850378.721670.77370.21.17001.36891.60161.87392.192

16、42.56523.00123.51154.10844.80685.62406.58017.69879.007510.53912.33014.42616.87919.74823.10627.03431.62937.00643.29750.65859.27069.34581.13494.927111.07533.872566.2123351.18001.39241.64301.93882.28782.69963.18553.75894.43555.23386.17597.28768.599410.14711.97414.12916.67219.67323.21427.39332.32438.142

17、45.00853.10962.66973.94987.260102.97121.50143.37750.383927.4205551.19001.41611.68522.00532.38642.83983.37934.02144.78545.69476.77678.06429.596411.42013.59016.17219.24422.90127.25232.42938.59145.95354.64965.03277.38892.092109.59130.41155.19184.681051.75988.9341051.20001.44001.72802.07362.48832.98603.

18、58324.29985.15986.19177.43018.916110.69912.83915.40718.48822.18626.62331.94838.33846.00555.20666.24779.49795.396114.48137.37164.84197.81237.381469.89100.4563481.24001.53761.90662.36422.93163.63524.50775.58956.93108.594410.65713.21516.38620.31925.19631.24338.74148.03959.56873.86491.592113.57140.83174

19、.63216.54268.51332.95412.86511.95634.825455.946890*1.25001.56251.95312.44143.05183.81474.76845.96057.45069.313211.64214.55218.19022.73728.42235.52744.40955.51169.38986.736108.42135.53169.41211.76264.70330.87413.59516.99646.23807.797523.270065*1.28001.63842.09722.68443.43604.39805.62957.20589.223411.

20、80615.11219.34324.75931.69140.56551.92366.46186.071108.89139.38178.41228.36292.30374.14478.90613.00784.641004.31285.61645.519427*1.30001.69002.19702.85613.71294.82686.27498.157310.60413.78617.92223.29830.28839.37451.18666.54286.504112.46146.19190.05247.06321.18417.54542.80705.64917.331192.51550.3202

21、1.42620.036119*1.32001.74242.30003.03604.00755.28996.98269.217012.16616.06021.19927.98336.93748.75764.35984.954112.14148.02195.39257.92340.45449.39593.20783.021033.61364.31800.92377.23137.94142.166521*1.36001.84962.51553.42104.65266.32758.605411.70315.91721.64729.43940.03754.45174.053100.71136.97186

22、.28253.34344.54468.57637.26866.671178.71603.02180.12964.94032.35483.97458.110143*复利现值系数表(PVIF表) * 0.0001ni%123456789101112131415161718192024252830323536405012345678910111213141516171819202122232425262728293035404550550.99010.98030.97060.96100.95150.94200.93270.92350.91430.90530.89630.88740.87870.870

23、00.86130.85280.84440.83600.82770.81950.81140.80340.79540.78760.77980.77200.76440.75680.74930.74190.70590.67170.63910.60800.57850.98040.96120.94230.92380.90570.88800.87060.85350.83680.82030.80430.78850.77300.75790.74300.72840.71420.70020.68640.67300.65980.64680.63420.62170.6950.59760.58590.57440.5631

24、0.55210.50000.45290.41020.37150.33650.97090.94260.91510.88850.86260.83750.81310.78940.76640.74410.72240.70140.68100.66110.64190.62320.60500.58740.57030.55370.53750.52190.50670.49190.47760.46370.45020.43710.42430.41200.35540.30660.26440.22810.19680.96150.92460.88900.85480.82190.79030.75990.73070.7026

25、0.67560.64960.62460.60060.57750.55530.53390.51340.49360.47460.45640.43880.42200.40570.39010.37510.36040.34680.33350.32070.30830.25340.20830.17120.14070.11570.95240.90700.86380.82270.78350.74620.71070.67680.64460.61390.58470.55680.53030.50510.48100.45810.43630.41550.39570.37690.35890.34180.32560.3101

26、0.29530.28120.26780.25510.24290.23140.18130.14200.11130.08720.06830.94340.89000.83960.79210.74730.70500.66510.62740.59190.55840.52680.49700.46880.44230.41730.39360.37140.35030.33050.31180.29420.27750.26180.24700.23300.21980.20740.19560.18460.17410.13010.09720.07270.05430.04060.93460.87340.81630.7629

27、0.71300.66630.62270.58200.54390.50830.47510.44400.41500.38780.36240.33870.31660.29590.27650.25840.24150.22570.21090.19710.18420.17220.16090.15040.14060.13140.09370.06680.04760.03390.02420.92590.85730.79380.73500.68060.63020.58350.54030.50020.46320.42890.39710.36770.34050.31520.29190.27030.25020.2317

28、0.21450.19870.18390.17030.15770.14600.13520.12520.11590.10730.09940.06760.04600.03130.02130.01450.91740.84170.77220.70840.64990.59630.54700.50190.4604042240.38750.35550.32620.29920.27450.25190.23110.21200.19450.17840.16370.15020.13780.12640.11600.10640.09760.08950.08220.07540.04900.03180. 70.01340.0

29、0870.90910.82640.75130.68300.62090.56450.51320.46650.42410.38550.35050.31860.28970.26330.23940.21760.19780.17990.16350.14860.13510.12280.11170.10150.09230.08390.07630.06930.06300.05730.03560.02210.01370.00850.00530.90090.81160.73120.65870.59350.53460.48170.43390.39090.35220.31730.28580.25750.23200.2

30、0900.18830.16960.15280.13770.12400.11170.10070.09070.08170.07360.06630.05970.05380.04850.04370.02590.01540.00910.00540.00320.89290.79720.71180.63550.56740.50660.45230.40390.36060.32200.28750.25670.22920.20460.18270.16310.14560.13000.11610.10370.09260.08260.07380.06590.05880.05250.04690.04190.03740.0

31、3340.01890.01070.00610.00350.0 0.88500.78310.69310.61330.54280.48030.42510.37620.33290.29460.26070.23070.20420.18070.15990.14150.12520.11080.09810.08680.07680.06800.06010.05320.04710.04170.03690.03260.02890.02560.01390.00750.00410.00220.00120.87720.76950.67500.59210.51940.45560.39960.35060.30750.269

32、70.23660.20760.18210.15970.14010.12290.10780.09460.08290.07280.06380.05600.04910.04310.03780.03310.02910.02550.02240.01960.01020.00530.00270.00140.00070.86960.75610.65750.57180.49720.43230.37590.32690.28430.24720.21490.18690.16250.14130.12290.10690.09290.08080.07030.06110.05310.04620.04020.03490.030

33、40.02640.02300. 00.01740.01510.00750.00370.00190.00090.00050.86210.74320.64070.55230.47620.41040.35380.30500.26300.22670.19540.16850.14520.12520.10790.09300.08020.06910.05960.05140.04430.03820.03290.02840.02450.02110.01820.01570.01350.01160.00550.00260.00130.00060.00030.85470.73050.62440.53370.45610

34、.38980.33320.28480.24340.20800.17780.15200.12990.11100.09490.08110.06930.05920.05060.04330.03700.03160.02700.02310.01970.01690.01440.01230.01050.00900.00410.00190.00090.00040.00020.84750.71820.60860.51580.43710.37040.31390.26600.22550.19110.16190.13730.11630.09850.08350.07090.06000.05080.04310.03650

35、.03090.02620.02220.01880.01600.01350.01150.00970.00820.00700.00300.00130.00060.00030.00010.84030.70620.59340.49870.41900.35210.29590.24870.20900.17560.14760.12400.10420.08760.07360.06180.05200.04370.03670.03080.02590.02180.01830.01540.01290.01090.00910.00770.00640.00540.00230.00100.00040.0002.0.0001

36、0.83330.69440.57870.48230.40190.33490.27910.23260.19380.16150.13460.11220.09350.07790.06490.05410.04510.03760.03130.02610.02170.01810.01510.01260.01050.00870.00730.00610.00510.00420.00170.00070.00030.0001*0.80650.65040.52450.42300.34110.27510.22180.17890.14430.11640.09380.07570.06100.04920.03970.032

37、00.02590. 80.01680.01350.01090.00880.00710.00570.00460.00370.00300.00240.0 0.00160.00050.00020.0001*0.80000.64000.51200.40960.32770.26210.20970.16770.13420.10740.08590.06870.05500.04400.03520.02810.02250.01800.01440.01150.00920.00740.00590.00470.00380.00300.00240.00190.00150.00120.00040.0001*0.78130.61040.47680.37250.29100.22740.17760.13880.10840.08470.06620.05170.04040.03160.02470.01930.01