Abstract：In the construction of urban viaducts, in order to reduce the impact of bridge piers and foundation construction on road traffic, the quick-installed bridge piers and anchor static pressure pile construction technology can be used. Taking the anchor static pressure pile foundation of a quick-installed bridge pier as the background, the settlement characteristics of the static pressure pile of the anchor rod were studied according to the characteristics of post-pressing piles. The finite element models of pile-free pile cap and pile-group foundation after pile-pressing were established respectively. The influence of the elastic modulus of the upper soil layer (E1), the elastic modulus of the lower soil layer (E2) and the friction coefficient of the pile side (f) on the maximum settlement of the foundation (smax) and the load sharing ratio (η) were compared and analyzed. The results show that: under the two working conditions with pile-free pile cap and pile-group foundation after pile pressing, with the increase of E1 and E2, the maximum settlement of the foundation smax continues to decrease; E1 has a greater influence on the smax of the pile-free foundation, and E2 has a greater influence on the smax of the pile-group foundation; as f increases, the smax of the pile group foundation and the soil load sharing ratio ηsoil gradually decrease, but the influence of f is limited.
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2020, Vol. 39 
