有粘結(jié)強(qiáng)度復(fù)合地基承載力計(jì)算、驗(yàn)算

CFG樁復(fù)合地基承載力計(jì)算,,,,,,,,

計(jì)算參數(shù),,,,,,,,

鉆孔編號(hào),A11,"樁頂絕對(duì)

標(biāo)高（m）",28.84,基礎(chǔ)埋深（m）,10.00,基礎(chǔ)底以上重度（rm）,18.00,

"樁直徑

d（m）",樁有效持力層土層巖性,"樁周長(zhǎng)

Up（m）","樁截面面積

Ap（m2）","地基承載力

fsk（kPa)",復(fù)合地基承載力特征值（fspk）,深度修正系數(shù)（η）,修正后復(fù)合地基承載力（fspa）,

0.50,④圓礫,1.57,0.20,280.00,410.00,1.00,473.00,

樁端端阻力發(fā)揮系數(shù)α=,,0.95,單樁承載力發(fā)揮系數(shù)：λ=,,0.90,樁間土承載力發(fā)揮系數(shù):β=,,0.90

①根據(jù)樁身側(cè)阻力及端阻力確定單樁承載力特征值Ra(kN),,,,,,,,

土層號(hào),土層性質(zhì),極限側(cè)摩阻力,極限端阻力,各土層底部高程,樁穿土的厚度,側(cè)摩阻力,極限樁端阻力,"單樁豎向承

載力特征值"

,,Qsi(kPa),Qp(kPa),H(m),Li(m),UP*Li*Qsi(kN),Ap*Qp(kN),Ra(kN)

④,4圓礫,120.00,,27.43,1.41,132.89,,

④1,4-1細(xì)砂,58.00,,26.63,0.80,36.44,,

④,4圓礫,120.00,,23.53,3.10,292.17,,

⑤1,5-1粘土,55.00,,21.73,1.80,77.75,,

⑤2,5-2粘質(zhì)粉土,55.00,,20.63,1.10,47.52,,

⑤,5細(xì)砂,62.00,,18.73,1.90,92.52,,

⑥,6卵石,140.00,,17.84,0.89,97.86,,

⑥,6卵石,140.00,2400.00,11.33,6.51,,,

⑦,7細(xì)砂,70.00,,6.73,4.60,,,

⑧,8卵石,150.00,,-1.67,8.40,,,

樁端持力層,⑥卵石,140.00,2400.00,樁長(zhǎng)L(m),11.00,777.15,235.62,1000.99

②根據(jù)樁體強(qiáng)度確定單樁承載力特征值Ra'(kN),,,,,,,,

商砼強(qiáng)度,C30,砼立方體抗壓強(qiáng)度平均值fcu(kPa):,30000.00,,Ra'≤,1636.25,kN,

③當(dāng)復(fù)合地基承載力進(jìn)行基礎(chǔ)埋深的深度修正時(shí)，單樁承載力特征值確定,,,,,,,,

商砼強(qiáng)度,C25,砼立方體抗壓強(qiáng)度平均值fcu(kPa):,25000.00,,Ra''≤,1001.48,kN,

綜合①、②、③取其中小值得,,,,計(jì)算值Ra(KN),1000.99,實(shí)際取值Ra（KN）,900.00,

"④置換率計(jì)算（m=(fsp,k-β·fsk)/(λ·Ra/Ap-β·fsk)",,,,m=,4.08,計(jì)算樁距（m）s=,2.19,

,,實(shí)際布樁間距（m）,,s=,2.00,實(shí)際布樁置換率m=,4.89,

"⑤復(fù)合地基承載力驗(yàn)算fsp,k=λ·m·Ra/Ap+β·(1-m)·fsk",,,,,,"計(jì)算得：fsp,k=",441.60,KPa

"計(jì)算結(jié)果,地基復(fù)合承載力特征值fsp,k=",,,,441.6kPa,"≥410kPa,未修正復(fù)合地基承載力特征值要求。",,,

⑥復(fù)合地基承載力修正，fspa=fspk+η·rm(d-0.5)·fsk,,,,,,"計(jì)算得：fsp,a=",504.60,kpa

"計(jì)算結(jié)果,地基復(fù)合承載力特征值fsp,a=",,,,504.6kPa,"≥473kPa,修正后復(fù)合地基承載力特征值滿足要求。",,,

復(fù)核地基壓縮模量計(jì)算,,,,,,,,

土層號(hào),土層性質(zhì),"土層重度

（kN/m3）","各土層底部標(biāo)高

（m）","基底下土層厚度

（m）","壓縮模量

（Mpa）",§（地基模量放大倍數(shù)）,"復(fù)合地基壓縮模量

（Mpa）",承載力特征值

4圓礫,,21.00,27.43,1.41,30.00,1.46,43.93,280.00

4-1細(xì)砂,,20.50,26.63,0.80,25.00,1.46,36.61,200.00

4圓礫,,21.00,23.53,3.10,30.00,1.46,43.93,280.00

5-1粘土,,18.70,21.73,1.80,7.60,1.46,11.13,200.00

5-2粘質(zhì)粉土,,19.60,20.63,1.10,13.50,1.46,19.77,200.00

5細(xì)砂,,20.50,18.73,1.90,28.00,1.46,41.00,220.00

6卵石,,22.00,17.84,0.89,40.00,1.46,58.57,350.00

6卵石,,22.00,11.33,6.51,40.00,1.00,40.00,350