一、桩侧土壤稳定性的检算桩基设计中,桩身两侧任一点对土壤产生的水平压应力(弹性抗力)σ_y不应超过该点被动与主动压力之差[1],即σ_y≤η_1η_2 4/cosΦ(γytgΦ+c) (1)式中Φ为土壤内摩擦角;γ为土壤的容重(当有水时,要考虑水的静水压力);c为土壤粘聚力;η_1及η_2为与荷载及结构形式有关的系数。 First, the pile side of the soil stability of the calculation Pile design, the pile at both sides of any point of horizontal soil stress (elastic resistance) σ_y should not exceed the point of passive and active pressure difference [1], that σ_y ≤ η_1η_2 4 / cosΦ (γytgΦ + c) (1) where Φ is the internal friction angle of the soil; γ is the bulk density of the soil (when hydrostatic pressure is taken into account); c is the soil cohesion; η 2 is the load and the structure of the form of the coefficient.