Improved anchor rod static pressure pile structure and construction method: Fid-Bau Portal

Improved anchor rod static pressure pile structure and construction method

KANG ZENGZHU / LIU GUANGLEI / SONG JIE / WU TAO / YANG CHUNYU

The improved anchor rod static pressure pile structure and the construction method are applied to the technical engineering field of building foundation construction, an anchor rod static pressure pile comprises a pile core, a pile end and a pile periphery reinforcing body, the pile core is a non-equal-diameter body and comprises a large-diameter section and a small-diameter section, the lowest section of the pile core is the large-diameter section, and the small-diameter section is the small-diameter section. The large-diameter sections and the small-diameter sections are arranged in a staggered mode, the contact area of a pile and soil is reduced in the pile pressing process, the pile pressing resistance is reduced, and then the requirement for a pile pressing device and the influence on an original structure are reduced; a pile end grouting hole is formed in the pile end, a pile side grouting hole is formed in the small-diameter section, after the anchor rod static pressure pile is pressed to the designed depth, segmented grouting is conducted through the grouting hole, the pile periphery reinforcing body is formed, finally, the single-pile bearing capacity of the anchor rod static pressure pile is improved, the number of the anchor rod static pressure pile is reduced, the manufacturing cost is reduced, and the construction period is shortened.

本发明公开一种改进的锚杆静压桩结构及施工方法，应用于建筑基础施工技术工程领域,所述的锚杆静压桩包括桩芯、桩端和桩周加固体3个部分，所述的桩芯为非等直径体，包括大直径段和小直径段，所述的桩芯最下段为大直径段，大直径段与小直径段交错布置，在压桩的过程中减少了桩与土的接触面积，减小了压桩阻力，进而减小了对压桩装置的要求以及对原结构的影响；所述的桩端开设有桩端注浆孔，所述的小直径段开设有桩侧注浆孔，待锚杆静压桩压桩至设计深度后，通过注浆孔进行分段注浆，形成所述的桩周加固体，最终提高锚杆静压桩的单桩承载力，进而减少了锚杆静压桩的数量，减少造价、节约工期。

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