湖南大学学报（自然科学版）2025，Vol.52Issue(5)：79-87,9.DOI:10.16339/j.cnki.hdxbzkb.2025049
带扩大桩靴桩侧同步灌浆预制桩承载力试验研究
Experimental Study on Bearing Capacity of Precast Piles with Enlarged Pile Toes and Pile Side Synchronous Grouting
摘要
Abstract
To meet society's increasing demand for low-cost and high-strength pile foundations,this paper proposes a new type of pile,a precast pile foundation with enlarged pile toes and synchronous grouting on the side of piles.The new pile type has the advantages of low energy consumption and high efficiency.On the one hand,it has easy construction steps and conventional construction equipment,which is convenient for engineering popularization and application.On the other hand,enlarged pile toes increase the effective diameter of the piles and thus improve the bearing capacity of pile end.Meanwhile,the cement slurry infiltrates into the surrounding soil,which can improve the characteristics of the pile soil contact surface,thereby increasing the pile side friction.To further prove the load-bearing characteristics of the synchronously grouted precast pile foundation with enlarged plie toes,an indoor model test is carried out in this paper.The test results show that the bearing capacity of the synchronous grouting model pile with enlarged pile toe is higher than that of the conventional pile with equal cross-section when the pile top is compressed,and its bearing capacity is further improved due to the existence of cement slurry on the pile side.The test results reveal the bearing mechanism of the new pile type and show the superiority of the new pile type's bearing capacity.The results of this research can provide theoretical support for new pile-type engineering practices.关键词
桩基础/扩大桩靴/桩侧灌浆/承载力/静载荷模型试验Key words
pile foundation/enlarged pile toes/pile side grouting/bearing capacity/static load model test分类
土木建筑引用本文复制引用
王奎华,耿少寒,许应豪,吴君涛,邱尚印,黄山..带扩大桩靴桩侧同步灌浆预制桩承载力试验研究[J].湖南大学学报（自然科学版）,2025,52(5):79-87,9.基金项目
浙江省自然科学基金重点资助项目(LXZ22E080001),Key Program of the Natural Science Foundation of Zhejiang Pvovince(LXZ22E080001) （LXZ22E080001）
国家自然科学基金资助项目(52178358,52108349),National Natural Science Foundation of China(52178358,52108349) （52178358,52108349）
