题目内容

某群桩基础的平面、剖面如图所示,已知作用于桩端平面处长期效应组合的附加压力为300kPa,沉降计算经验系数φ=0.7,其他系数见附表,按《建筑桩基技术规范》(JGJ 94—94)估算群桩基础的沉降量,其值最接近()。

A. 2.5cm
B. 3.0cm
C. 3.5cm
D. 4.0cm

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