地下室抗浮驗算計算書

一、截面參數

    建筑層高       H₁=3600mm

    柱網Lx         L_x=8100mm        柱網Ly         L_y=8100mm

    抗浮水位       H₂=-500mm

    頂板覆土       H₃=1500mm

    頂板厚         h₁=300mm

    框梁寬         B_w=400mm         框梁高         B_h=800mm

    框柱寬         C_w=600mm         框柱高         C_h=600mm

    面層厚         h₂=100mm

    底板厚         h₃=400mm

    柱墩寬         D_x=2200mm        柱墩長         D_y=2200mm

    柱墩厚         h₄=200mm

二、容重參數

    水浮力         γ₁=9.8 kN/m3

    覆土容重       γ₁=17 kN/m3

    鋼砼容重       γ₁=25 kN/m3

    面層容重       γ₁=20 kN/m3

三、浮力計算

    水位差         H₄=H₃+H₁+h₂+h₃+h₅+H₂=5100mm

    水浮力         N=γ₁H₄=49.98KN

四、自重計算

    覆土           G₁=γ₂H₃=25.5KN

    頂板           G₂=γ₃h₁=7.5KN

    框梁           G₃=γ₃B_w(B_h-h₁)(L_x+L_y)/L_x/L_y=1.23KN

    框柱           G₄=γ₃C_wC_h(H₁-B_h)/L_x/L_y=0.38KN

    面層           G₅=γ₄h₂=2KN

    底板           G₆=γ₃h₃=10KN

    柱墩           G₇=γ₃D_xD_yh₄/L_x/L_y=0.37KN

    總重           G=G₁+G₂+G₃+G₄+G₅+G₆+G₇=46.98KN

五、抗浮驗算

    抗浮系數       k=G/N=0.94<1.05

                               抗浮不滿足

六、單柱抗拔力

                  F=(N*1.05-G)*I2*I3=360.79 KN