路基工程Issue(3)：211-215,5.DOI:10.13379/j.issn.1003-8825.202508018
CFG桩施工自动渣土输送系统设计与应用研究
Study on the Design and Application of An Automatic Spoil Conveying System for CFG Pile Construction
摘要
Abstract
CFG piles were widely used in soft soil foundation treatment.However,during construction with long spiral drilling rigs,spoil tended to accumulate at the borehole opening and slid down along the borehole wall,leading to insufficient compaction at the pile tip.This further disrupted the uniform pumping of the concrete mixture,and consequently affected construction efficiency and pile bearing capacity.To address these issues,an automatic spoil conveying system for CFG pile construction was developed.The system consisted of a soil collection cylinder,a scraper mechanism,and a belt conveying unit.Through structural integration and path optimization,it enabled synchronous collection and long-distance conveyance of drilling spoil.The system was applied and evaluated in the practical engineering context of the second contract section of the Jiyuan—Xin'an Expressway project,with assessments focusing on construction quality,efficiency,and economic performance.Results show that the system can significantly reduce the risk of bottom-hole spoil recirculation,improve pile tip quality,reduce pile head damage rate to 0%,increase construction efficiency by approximately 52.0%,and lower unit cost by about 21.0%.The research provides a feasible technical solution for drilling spoil control in CFG pile construction,demonstrating strong adaptability and high potential for broader engineering application.关键词
软土地基/钻渣干扰/自动渣土输送系统/结构优化/质量控制/经济性/适用性Key words
soft ground foundation/drilling debris interference/automatic spoil conveying system/structural optimization/quality control/cost-effectiveness/applicability分类
建筑与水利引用本文复制引用
贾先有,刘超,涂荣辉,郑竞友,胡淼良,王强..CFG桩施工自动渣土输送系统设计与应用研究[J].路基工程,2026,(3):211-215,5.基金项目
浙江省交通运输厅项目:复合地基路堤建养监测及全寿命评估体系研究(2023003) （2023003）
