咬合桩支护结构侧向土压力的试验研究

Analysis of earth pressure of the secant piles support structure

作为永久支护和竖向承重结构的城市下穿式立交桥咬合桩支护结构,其工作状态与传统支护结构的工作状态有着明显区别,实测值与朗肯土压力理论计算误差较大。通过原位试验,分析了支护结构主动区和被动区土压力与理论计算的区别。采用对朗肯土压力理论的修正使之与实测结果相对吻合。

Being permanence support structure and vertical bearing structure, the working mechanism of the secant piles support structure in city under bridge of underpasses is obvious differ from tradition support structure. The value on-the-spot survey has biggish error with theoretic calculation. Via analyzing for the earth pressure in initiative and passive area, the amend means of theoretic earth pressure be elicited.