Bearing capacity of static drill rooted pile subjected to traffic loads and a design method

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-09-04 DOI:10.1016/j.trgeo.2025.101712

Jiaxin Liu , Hang Wu , Zhongjie Zhang , Jiahe Chen , Xuan Cao , Chanjuan Han

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引用次数: 0

Abstract

As urban railway networks expand globally, demands for sustainable pile foundations with high bearing capacity and environmental compatibility have intensified. Traditional pile methods generate significant waste and quality control issues, while static drill rooted (SDR) piles, combining precast elements with cement-soil mixtures, offer environmental advantages over traditional pile foundations. However, their performance under railway traffic loads remains insufficiently investigated. Through field testing and numerical modeling, this study analyzes SDR pile’s performance under traffic loading and develops modified design methods. Results reveal that dynamic effects become critical when load ratio λ exceeds 0.61, requiring capacity reduction factors up to 4.3%. Modified load-settlement curves and design equations are developed specifically for railway applications. This quantitative framework provides practical engineering guidance for implementing this environmentally friendly pile foundation technology in urban railway infrastructure worldwide.

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静钻孔桩在交通荷载作用下的承载力及设计方法

随着城市铁路网在全球范围内的扩张，对高承载能力和环境兼容性的可持续桩基的需求日益增加。传统的桩法产生了严重的浪费和质量控制问题，而静力钻孔桩（SDR）结合了预制构件和水泥土混合物，比传统的桩基础具有环保优势。然而，它们在铁路交通荷载下的性能研究还不够充分。通过现场试验和数值模拟，分析了SDR桩在交通荷载作用下的性能，提出了改进的设计方法。结果表明，当负载比λ超过0.61时，动态效应变得至关重要，需要高达4.3%的容量缩减因子。修正荷载沉降曲线和设计方程是专门为铁路应用开发的。该定量框架为在世界范围内的城市轨道交通基础设施中实施这种环境友好型桩基技术提供了实用的工程指导。

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.