CFG桩桩头施工新方法及不同桩帽受力特征分析  

A new construction method for CFG pile head and mechanical analysis of different CFG pile caps

作　　者：丁运鹏 DING Yunpeng(China Railway 14th Bureau Group 2nd Engineering Co.,Ltd.,Taian 271000,Shandong,China)

机构地区：[1]中铁十四局集团第二工程有限公司,山东泰安271000

出　　处：《地基处理》2025年第1期69-75,100,共8页Journal of Ground Improvement

摘　　要：CFG桩因其低成本和高效能的特点广泛应用于地基加固,以提升地基承载力和减少沉降。针对传统CFG桩桩头处理方法存在效率低、能耗高的问题,本文提出一种“前截法”联合桩帽土模法的绿色施工新工艺,通过优化桩头施工和减少多余土石方,降低施工过程中的能耗和资源浪费。本工艺采用圆形桩帽,简化了传统桩头截除工序,并减少了桩周土扰动。基于有限元模拟分析,研究了不同桩帽形状(圆形与方形)对CFG桩复合地基承载力、桩身轴力以及桩土应力比的影响。结果表明,相较于传统方形桩帽,圆形桩帽在加载过程中表现出更均匀的荷载分布与更稳定的受力特性。该工艺在提升施工效率和降低环境影响方面具有显著优势,为地基处理技术的进一步发展和绿色建筑技术的应用提供了新的技术参考。CFG piles are widely used in foundation reinforcement due to their cost-effectiveness and high efficiency in improving the bearing capacity of foundations and reducing settlement.To address the challenges of low efficiency and high energy consumption in traditional CFG pile head treatment methods,this paper introduces a new“pre-cut method”combined with a soil mold technique for pile caps.This environmental-friend process optimizes pile head construction and reduces excess excavation,thereby reducing energy consumption and resource waste during construction.The process involves the formation of circular pile caps,simplifying the traditional pile head removal steps and reducing soil disturbance around the piles.Based on finite element simulation analysis,the study investigated the effects of different pile cap shapes(circular and square)on the bearing capacity,axial force of the pile,and pile-soil stress ratio in CFG pile composite foundation.The results indicate that,compared to traditional square pile caps,circular pile caps exhibit more uniform load distribution and more stable load-bearing characteristics during loading.This technique offers significant advantages in improving construction efficiency and reducing environmental impact,providing a valuable technical reference for the further development of foundation treatment technologies and the application of green building techniques.

关 键 词：CFG桩复合地基 施工工艺 桩帽形状 数值模拟 沉降 

分 类 号：TU473[建筑科学—结构工程]