论文部分内容阅读
一、前言 受桩约束的土体冻胀时,一方面对桩产生切向冻胀力,另一方面对下卧土层产生冻胀反力。扩大式桩基础能够接受冻胀反力,具有自锚作用,因而是季节冻土区防治桩基冻拔的一种有效的结构措施。目前松辽流域的一些渠系水工桥涵工程已开始推广扩大式桩基础。
I. INTRODUCTION When the pile body constrains the frost heaving of the soil, on the one hand, the pile has a tangential frost heave force, and on the other hand it has a frost heaving reaction force to the underlying soil layer. The enlarged pile foundation can accept frost heaving reaction force and has self-anchoring effect. Therefore, it is an effective structural measure for preventing and freezing frozen piles in the seasonal frozen soil area. At present, some canal hydraulic bridges and culverts in Songliao River Basin have begun to promote the expansion of pile foundations.