A thawing pile foundation structure suitable for permafrost regions

Abstract

This utility model relates to a pile foundation structure for preventing thaw settlement in permafrost regions. The structure includes an upper pile section, a lower pile section, a yielding device, and an expanded pile plate. The upper and lower pile sections are connected by the yielding device. The expanded pile plate is located on the upper outer periphery of the lower pile section, and its upper end face is embedded in the upper pile section. Several welded supports are located on the inner side of the expanded pile plate. Several pre-embedded supports are located on the upper part of the lower pile section, corresponding one-to-one with the welded supports. One end of each pre-embedded support is connected to a swing arm via a pivot, and the other end of the swing arm is connected to the welded support via a pivot. This utility model has a simple structure and strong practicality. When the upper pile section moves downward, it pushes the expanded pile plate outward, increasing the pile side friction and thus preventing thaw settlement of the pile foundation.

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