咬合桩作为永久结构在下穿式立交桥中的应用

The application of the secant pile acting as the permanent structure of undercrossing overpass

一般地,咬合桩往往被用作深基坑工程的临时支护结构。笔者结合工程实践,首次提出将咬合桩作为下穿式立交桥的永久受力结构,并基于板桩墙计算理论,给出了在不同支撑条件下的咬合桩的计算方法,明确了其独特的施工工法和适用的工程地质条件。

Generically, the secant pile was used as the temporary support structure of a deep hole excavated. The secant pile acted as the permanent bearing structure of undercrossing overpass was firstly put forward with engineering practice. The secant pile calculation method under different support conditions was also put forward, based on the theory of sheet pile wall calculation theory. The particular construction method and the applicable geologic condition of the secant pile were pointed out.