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Corresponding Author

龚维明,男,博士,教授.E-mail:wmgong@seu.edu.c

Abstract

To study the overall bearing performance of piles and caps, this paper conducted on-site vertical excitation tests on the free field, single pile, and two pile caps. By analyzing the variation laws of pile head acceleration, pile head displacement amplitude, and vertical stiffness with the frequency, the joint bearing performance of piles and caps was studied. The experimental results show that the acceleration of the free field is much greater than the acceleration amplitude of a single pile and two piles, and the acceleration amplitude of a single pile head is about twice that of two piles. Meanwhile, the displacement amplitude of the free field and single pile shows a trend of first increasing and then decreasing with the increasing frequency, and a resonance region appears, with the resonance frequency of a single pile greater than the vibration frequency of the free field. The displacement amplitude of two piles increases first and then stabilizes with the rising frequency, with no resonance zone appearing. Comparing the variation curves of displacement amplitude of the free field, a single pile, and two piles with the frequency, it can be seen that the displacement amplitude of the free field is much larger than that of a single pile and two piles, and the displacement amplitude of the two-pile cap pile foundation is the smallest.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.009

First Page

53

Last Page

57

Submission Date

May 2025

Reference

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