灌注桩竖向和抗拔承载力计算
选用说明：
桩竖向承载力公式桩抗拔钢筋公式A S≥
表中的桩长，由强风化面层开始计算,桩长为主要施工控制依据Ra=u*∈qsia*li+qpa*Ap
桩长L L大于15m L小于等于15m式中：A S——桩钢筋或预应力钢绞线截面面积（m2）；
地质报告qpa1000700桩抗拔承载力公式0.69ξ2——锚筋抗拉工作等效系数，永久性锚杆取0.69，临时性锚杆取0.92；
取代表值qsia6565Rta=up*∈qsia*li*Лi+0.9*G0 1.1γ0——工程重要性系数，一般取1.0，甲级基础取1.1；
取摩擦力折减系数Лi=0.7 1.4γQ——荷载分项系数为1.4；
360f y——纵筋或预应力钢绞线抗拉强度设计值（kPa）；
N ti——相应于作用的标准组合时，单根桩所承受的拉力值（kN）。
现在地质报告表明，中风化、强风化夹层很多。故按桩长控制。原总订无抗拔要求选用8m桩长，钢筋按最小配筋率；有抗拔要求选12m，按抗拔力力配筋。不同承载力选不同直径。
桩截面积Ap0.2827430.3848450.5026550.6361730.7853980.950332 1.130973 1.327323 1.53938 1.7671462.010619 2.269801 2.544692.835287 3.1415933.463606 3.8013274.154756 4.523893
桩周长u 1.8849562.199115 2.513274 2.827433 3.141593 3.455752 3.769911 4.08407 4.39823 4.7123895.026548 5.340708 5.6548675.969026 6.2831856.597345 6.9115047.2256637.539822
桩直径0.60.70.80.91 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.92 2.1 2.2 2.3 2.4
灌注桩竖向承载力KN
6933.0531127.0461332.0351548.021*******.9752261.9472521.9142792.8763074.8343367.7873671.7363986.6814312.6214649.5574997.4895356.4155726.3386107.256
71055.5751269.9891495.3981731.8031979.2032237.5992506.9912787.3783078.7613381.1393694.5134018.8824354.2474700.6085057.9645426.3165805.6636196.0066597.345
81178.0971412.9311658.7611915.5862183.4072462.2232752.0353052.8433364.6463687.4444021.2394366.0284721.8145088.5955466.3715855.1436254.9116665.6747087.433
91300.6191555.8741822.1242099.3692387.612686.8472997.0793318.3073650.5313993.754347.9644713.1745089.385476.5815874.7786283.9716704.1597135.3427577.521
101423.1411698.8161985.4872283.1522591.8142911.4713242.1243583.7723936.4164300.0554674.695060.325456.9465864.5686283.1856712.7987153.4067605.018067.61
111545.6641841.7592148.8492466.9362796.0173136.0953487.1683849.2364222.3014606.365001.4165407.4665824.5136252.5556691.5927141.6257602.6548074.6798557.698
121668.1861984.7012312.2122650.7193000.2213360.7193732.2124114.7014508.1854912.6665328.1415754.6126192.0796640.5417099.9997570.4538051.9028544.3479047.787
131790.7082127.6442475.5752834.5023204.4253585.3433977.2564380.1664794.075218.9715654.8676101.7586559.6457028.5287508.4067999.288501.159014.0159537.875
141913.232270.5862638.9383018.2853408.6283809.9664222.3014645.635079.9555525.2765981.5926448.9046927.2127416.5157916.8138428.1088950.3979483.68310027.96
152120.5752528.9822953.0973392.923848.4514319.694806.6375309.2925827.6546361.7256911.5047476.9918058.1858655.0889267.6989896.01710540.0411199.7811875.22
162243.0972671.9253116.463576.7034052.6554544.3145051.6815574.7566113.5396668.037238.2297824.1378425.7519043.0749676.10510324.8410989.2911669.4512365.31
172365.6192814.8673279.8233760.4864256.8584768.9385296.7255840.2216399.4246974.3367564.9558171.2828793.3189431.06110084.5110753.6711438.5412139.1112855.4
182488.1412957.8093443.1863944.274461.0624993.5625541.7696105.6856685.3097280.6417891.6818518.4289160.8849819.04810492.9211182.511887.7912608.7813345.49
192610.6633100.7523606.5484128.0534665.2655218.1855786.8146371.156971.1947586.9468218.4068865.5749528.45110207.0310901.3311611.3312337.0313078.4513835.57
202733.1863243.6943769.9114311.8364869.4695442.8096031.8586636.6147257.0797893.2528545.1329212.729896.01710595.0211309.7312040.1512786.2813548.1214325.66
212855.7083386.6373933.2744495.6195073.6725667.4336276.9026902.0797542.9648199.5578871.8589559.86610263.5810983.0111718.1412468.9813235.5314017.7914815.75
222978.233529.5794096.6374679.4025277.8765892.0576521.9467167.5447828.8498505.8629198.5839907.01210631.1511370.9912126.5512897.8113684.7814487.4515305.84
233100.7523672.52242604863.1855482.0796116.6816766.9917433.0088114.7348812.1679525.30910254.1610998.7211758.9812534.9513326.6414134.0314957.1215795.93
243223.2743815.4644423.3625046.9695686.2836341.3057012.0357698.4738400.6199118.4739852.03510601.311366.2812146.9712943.3613755.4614583.2715426.7916286.02
253345.7963958.4074586.7255230.7525890.4866565.9297257.0797963.9378686.5049424.77810178.7610948.4511733.8512534.9513351.7714184.2915032.5215896.4616776.1
263468.3184101.3494750.0885414.5356094.696790.5537502.1238229.4028972.3899731.08310505.4911295.612101.4112922.9413760.1814613.1215481.7716366.1317266.19
273590.844244.2924913.4515598.3186298.8937015.1767747.1678494.8679258.27410037.3910832.2111642.7412468.9813310.9314168.5815041.9515931.0216835.817756.28
283713.3634387.2345076.8145782.1016503.0977239.87992.2128760.3319544.15810343.6911158.9411989.8912836.5513698.9114576.9915470.7716380.2617305.4618246.37
293835.8854530.1775240.1775965.8846707.37464.4248237.2569025.7969830.0431065011485.6612337.0313204.1114086.914985.415899.616829.5117775.1318736.46
303958.4074673.1195403.5396149.6686911.5047689.0488482.39291.2610115.9310956.311812.3912684.1813571.6814474.8915393.816328.4317278.7618244.819226.55
314080.9294816.0625566.9026333.4517115.7077913.6728727.3449556.72510401.8111262.6112139.1113031.3313939.2514862.8715802.2116757.2617728.0118714.4719716.64
324203.4514959.0045730.2656517.2347319.9118138.2968972.3899822.18910687.711568.9112465.8413378.4714306.8115250.8616210.6217186.0818177.2619184.1420206.72
334325.9735101.9465893.6286701.0177524.1148362.929217.43310087.6510973.5811875.2212792.5713725.6214674.3815638.8516619.0317614.9118626.519653.820696.81
344448.4955244.8896056.9916884.87728.3188587.5449462.47710353.1211259.4712181.5313119.2914072.7615041.9516026.8317027.4318043.7419075.7520123.4721186.9
354571.0175387.8316220.3537068.5837932.5218812.1679707.52110618.5811545.3512487.8313446.0214419.9115409.5116414.8217435.8418472.561952520593.1421676.99
364693.5395530.7746383.7167252.3678136.7259036.7919952.56610884.0511831.2412794.1413772.7414767.0615777.0816802.8117844.2518901.3919974.2521062.8122167.08
374816.0625673.7166547.0797436.158340.9289261.41510197.6111149.5112117.1213100.4414099.4715114.216144.6417190.818252.6519330.2220423.4921532.4822657.17
384938.5845816.6596710.4427619.9338545.1329486.03910442.6511414.9812403.0113406.7514426.1915461.3516512.2117578.7818661.0619759.0520872.7422002.1423147.25
395061.1065959.6016873.8057803.7168749.3369710.66310687.711680.4412688.8913713.0514752.9215808.4916879.7817966.7719069.4720187.8721321.9922471.8123637.34
405183.6286102.5447037.1687987.4998953.5399935.28710932.7411945.9112974.7814019.3615079.6416155.6417247.3418354.7619477.8720616.721771.2422941.4824127.43
灌注桩抗拔承载力KN
6537.4951631.5308726.8389823.4193921.2721020.3971120.7951222.4641325.4071429.6211535.1081641.8671749.8991859.2021969.7792081.6272194.7482309.1412424.807
7627.0776736.7859847.9787960.65581074.8171190.4631307.5941426.2081546.3081667.8911790.9591915.5122041.5482169.0692298.0752428.5652560.5392693.9982828.941
8716.6601842.0411969.11851097.8921228.3631360.531494.3931629.9531767.2091906.1612046.812189.1562333.1982478.9372626.3712775.5032926.3313078.8553233.076
9806.2426947.29621090.2581235.1291381.9081530.5961681.1921833.6971988.112144.4322302.6622462.8012624.8482788.8042954.6683122.4413292.1223463.7123637.21
10895.82511052.5511211.3981372.3651535.4531700.6621867.9912037.4412209.0112382.7022558.5132736.4452916.4983098.6713282.9643469.3793657.9133848.5694041.345
11985.40771157.8061332.5381509.6021688.9991870.7282054.792241.1852429.9122620.9722814.3643010.093208.1473408.5383611.2613816.3164023.7054233.4264445.479
121074.991263.0621453.6781646.8391842.5442040.7942241.5892444.9292650.8132859.2423070.2163283.7343499.7973718.4053939.5574163.2544389.4964618.2834849.614
131164.5731368.3171574.8181784.0751996.0892210.862428.3882648.6732871.7143097.5123326.0673557.3793791.4474028.2724267.8544510.1924755.2875003.1395253.748
141254.1551473.5721695.9571921.3122149.6352380.9272615.1872852.4173092.6153335.7823581.9183831.0234083.0974338.1394596.154857.135121.0795387.9965657.883
151343.7381578.8271817.0972058.5482303.182550.9932801.9863056.1613313.5163574.0533837.774104.6684374.7464648.0064924.4465204.0685486.875772.8536062.017
161433.321684.0821938.2372195.7852456.7252721.0592988.7863259.9053534.4173812.3234093.6214378.3124666.3964957.8735252.7435551.0065852.6616157.716466.152
171522.9031789.3372059.3772333.0212610.2712891.1253175.5853463.6493755.3184050.5934349.4724651.9574958.0465267.745581.0395897.9446218.4536542.5676870.286
181612.4851894.5922180.5172470.2582763.8163061.1913362.3843667.3933976.224288.8634605.3244925.6015249.6965577.6075909.3366244.8816584.2446927.4247274.421
191702.0681999.8482301.6562607.4942917.3613231.2583549.1833871.1374197.1214527.1334861.1755199.2465541.3455887.4746237.6326591.8196950.0357312.2817678.555
201791.652105.1032422.7962744.7313070.9073401.3243735.9824074.8814418.0224765.4035117.0265472.895832.9956197.3416565.9296938.7577315.8277697.1388082.69
211881.2332210.3582543.9362881.9683224.4523571.393922.7814278.6254638.9235003.6745372.8775746.5356124.6456507.2086894.2257285.6957681.6188081.9958486.824
221970.8152315.6132665.0763019.2043377.9983741.4564109.584482.3694859.8245241.9445628.7296020.1796416.2956817.0757222.5227632.6338047.4098466.8518890.959
232060.3982420.8682786.2163156.4413531.5433911.5224296.3794686.1135080.7255480.2145884.586293.8246707.9447126.9427550.8187979.5718413.2018851.7089295.093
242149.982526.1232907.3563293.6773685.0884081.5894483.1784889.8585301.6265718.4846140.4316567.4686999.5947436.817879.1148326.5098778.9929236.5659699.227
252239.5632631.3783028.4953430.9143838.6344251.6554669.9775093.6025522.5275956.7546396.2836841.1137291.2447746.6778207.4118673.4469144.7849621.42210103.36
262329.1452736.6343149.6353568.153992.1794421.7214856.7775297.3465743.4286195.0246652.1347114.7577582.8948056.5448535.7079020.3849510.57510006.2810507.5
272418.7282841.8893270.7753705.3874145.7244591.7875043.5765501.095964.3296433.2956907.9857388.4027874.5438366.4118864.0049367.3229876.36610391.1410911.63
282508.312947.1443391.9153842.6234299.274761.8535230.3755704.8346185.236671.5657163.8377662.0468166.1938676.2789192.39714.2610242.1610775.9911315.77
292597.8933052.3993513.0553979.864452.8154931.925417.1745908.5786406.1326909.8357419.6887935.6918457.8438986.1459520.59710061.210607.9511160.8511719.9
302687.4753157.6543634.1944117.0964606.365101.9865603.9736112.3226627.0337148.1057675.5398209.3358749.4939296.0129848.89310408.1410973.7411545.7112124.03
312777.0583262.9093755.3344254.3334759.9065272.0525790.7726316.0666847.9347386.3757931.398482.989041.1429605.87910177.1910755.0711339.5311930.5612528.17
322866.643368.1643876.4744391.574913.4515442.1185977.5716519.817068.8357624.6458187.2428756.6249332.7929915.74610505.4911102.0111705.3212315.4212932.3
332956.2233473.4193997.6144528.8065066.9965612.1846164.376723.5547289.7367862.9168443.0939030.2699624.44210225.6110833.7811448.9512071.1112700.2813336.44
343045.8053578.6754118.7544666.0435220.5425782.2516351.1696927.2987510.6378101.1868698.9449303.9139916.09210535.4811162.0811795.8912436.9113085.1313740.57
353135.3883683.934239.8934803.2795374.0875952.3176537.9687131.0427731.5388339.4568954.7969577.55810207.7410845.3511490.3812142.8312802.713469.9914144.71
363224.9713789.1854361.0334940.5165527.6326122.3836724.7687334.7867952.4398577.7269210.6479851.20210499.3911155.2111818.6712489.7613168.4913854.8514548.84
373314.5533894.444482.1735077.7525681.1786292.4496911.5677538.538173.348815.9969466.49810124.8510791.0411465.0812146.9712836.713534.2814239.714952.98
383404.1363999.6954603.3135214.9895834.7236462.5157098.3667742.2748394.2419054.2669722.3510398.4911082.6911774.9512475.2613183.6413900.0714624.5615357.11
393493.7184104.954724.4535352.2255988.2686632.5817285.1657946.0198615.1429292.5379978.20110672.1411374.3412084.8212803.5613530.5814265.8615009.4215761.24
403583.3014210.2054845.5935489.4626141.8146802.6487471.9648149.7638836.0439530.80710234.0510945.7811665.9912394.6813131.8613877.5114631.6515394.2816165.38
200间距可放钢筋根数9101214161719202224252728303133343638
强度计算对应HRB400抗拉钢筋量AS mm^2个体桩按承台实际拔力验算裂缝 （地基规范8.5.12）
63332.2963915.2884506.1675104.9345711.596326.1346948.5667578.8858217.0948863.199517.17410179.0510848.8111526.4612211.9912905.4213606.7314315.9315033.02
73887.6794567.8365257.1955955.7576663.5227380.4898106.668842.0339586.60910340.3911103.3711875.5512656.9413447.5314247.3315056.3215874.5216701.9217538.53
84443.0625220.3846008.2236806.5797615.4538434.8459264.75410105.1810956.1211817.5912689.5713572.0614465.0815368.6116282.6617207.2218142.3119087.9120044.03
94998.4455872.9316759.257657.4028567.3859489.20110422.8511368.3312325.6413294.7814275.7615268.5716273.2117289.6818317.9919358.1320410.121473.922549.53
105553.8276525.4797510.2788508.2249519.31710543.5611580.9412631.4813695.1614771.9815861.9616965.0818081.3519210.7620353.3221509.0322677.8923859.8925055.04
116109.217178.0278261.3069359.04610471.2511597.9112739.0413894.6215064.6716249.1817448.1518661.5919889.4821131.8422388.6523659.9324945.6726245.8827560.54
126664.5937830.5759012.33410209.8711423.1812652.2713897.1315157.7716434.1917726.3819034.3520358.0921697.6123052.9124423.9925810.8427213.4628631.8630066.04
137219.9768483.1239763.36211060.6912375.1113706.6215055.2316420.9217803.719203.5820620.5422054.623505.7524973.9926459.3227961.7429481.2531017.8532571.55
147775.3589135.67110514.3911911.5113327.0414760.9816213.3217684.0719173.2220680.7822206.7423751.1125313.8826895.0628494.6530112.6431749.0433403.8435077.05