高速液压夯处理改扩建公路地基加固效果与施工工艺研究  

Reinforcement effect and construction process of rapid impact compaction for highway reconstruction and expansion

作　　者：吕斌 房彦宏 宫海霞 刘亚珍 陈健 张宏博 孙兆云 Lyu Bin;Fang Yanhong;Gong Haixia;Liu Yazhen;Chen Jian;Zhang Hongbo;Sun Zhaoyun(Qilu Expressway Company Limited,Jinan 250101,Shandong,China;School of Qilu Transportation,Shandong University,Jinan 250002,Shandong,China;Shandong Transportation Research Institute,Jinan 250102,Shandong,China)

机构地区：[1]齐鲁高速公路股份有限公司,山东济南250101 [2]山东大学齐鲁交通学院,山东济南250002 [3]山东省交通科学研究院,山东济南250102

出　　处：《岩土工程技术》2025年第2期254-263,共10页Geotechnical Engineering Technique

基　　金：国家重点研发计划(2022YFB2602102)。

摘　　要：针对高速液压夯处理改扩建公路地基的技术不确定性,依托济广高速改扩建工程,通过调整夯击能、夯击次数、夯间距等施工参数,对高速液压夯处理粉土地基的加固效果与施工工艺进行了研究。研究表明:高速液压夯技术可有效提高地基的加固深度及密实度;夯击能和夯击次数是影响加固效果的主要施工参数,夯后土体加固效果随夯击次数与夯击能的增加均呈线性增加趋势;夯后土体侧向位移量随深度呈现抛物线变化趋势,各夯间距工况下土体侧向位移量在3~4 m埋深处达到峰值;高速液压夯处理粉土地基的最佳夯点间距为1.5 m,最大有效加固深度约6 m,最大有效加固半径约1.6 m。综合试验数据与理论分析,建立了高速液压夯处理粉土地基的加固范围计算公式。With the uncertainty in the technology of rapid impact compaction(RIC)for highway reconstruction and expansion,relying on the Ji-Guang Expressway project,the reinforcement effect and construction technology of RIC on loess foundations were studied by adjusting construction parameters such as compaction energy,compaction frequency,and compaction spacing.Meanwhile,the application effect and technical feasibility were verified.The study shows that the RIC can effectively improve the strength depth and compactness of the foundation.The compaction energy and frequency are the main construction parameters that affect the rein-forcement effect.The reinforcement effect of the compacted soil shows a linear increase trend with the increase of compaction fre-quency and compaction energy.The lateral displacement of the soil after compaction shows a parabolic trend with depth,and reaches its peak at a burial depth of 3-4 meters under various compaction spacing conditions.The optimal spacing between compaction points for high-speed hydraulic compaction of loess foundation is 1.5 meters,with a maximum effective reinforcement depth of about 6 meters and a maximum effective reinforcement radius of about 1.6 meters.Based on comprehensive experimental data and theoretical analysis,a calculation formula for the reinforcement range of RIC treatment of loess foundation has been established.

关 键 词：高速液压夯 改扩建公路 加固效果 施工工艺 

分 类 号：U416[交通运输工程—道路与铁道工程] TU472[建筑科学—结构工程]