岩溶地基注浆强化加固关键技术研究  

Key Technologies for Grouting Reinforcement of Karst Foundation

作　　者：李兴旺 沈晓辉 宋成法 周光军 梁俊志 宋杰 Li Xingwang;Shen Xiaohui;Song Chengfa;Zhou Guangjun;Liang Junzhi;Song Jie(Shandong Luqiao Group Co.,Ltd,Jinan,Shandong 250000;Shandong Agricultural University,Taian,Shandong 271018)

机构地区：[1]山东省路桥集团有限公司,山东济南250000 [2]山东农业大学,山东泰安271018

出　　处：《现代工程科技》2024年第1期53-56,共4页Modern Engineering Technology

摘　　要：覆盖型岩溶地基在我国西南地区岩溶地貌广泛分布,基岩在地下水的长时间作用下强度降低、稳定性差,可能引发地基沉降和坍塌,是我国高铁建设与运营的重大隐患。为此,应加强对岩溶地基的加固处理,并对其变形进行治理。注浆是目前地下工程中普遍应用的一种方法,它可以封堵地下水并加固破碎岩体。然而,由于注浆工程的隐蔽性和注浆材料在不同岩土介质中的表现不同,针对复杂岩溶地基的注浆参数和加固技术仍然需要更多深入研究和系统科学的理论指导。以桂林北站至桂林高新区路段为工程背景,通过揭示不同的裂隙开度、不同的注浆孔半径、不同的裂隙入口压力、不同的浆液性能等参数对岩溶注浆加固的影响,优化注浆关键参数,提出针对复杂岩溶发育地基治理的复合注浆强化加固关键技术。The covered karst foundation is widely distributed in karst landforms in the southwestern region of China.The strength of the bedrock decreases and its stability is poor under the long-term action of groundwater,which may cause foundation settlement and collapse.It is a major hidden danger for the construction and operation of high-speed railways in China.Therefore,it is necessary to strengthen the reinforcement treatment of karst foundation and control its deformation.Grouting is a commonly used method in underground engineering,which can seal groundwater and reinforce fractured rock masses.However,due to the concealment of grouting engineering and the different performance of grouting materials in different rock and soil media,more in-depth research and systematic scientific theoretical guidance are still needed for grouting parameters and reinforcement techniques for complex karst foundations.Taking the section from Guilin North Station to Guilin High tech Zone as the engineering background,this paper reveals the effects of different crack openings,grouting hole radii,crack inlet pressures,and slurry properties on karst grouting reinforcement,optimizes key grouting parameters,and proposes key composite grouting reinforcement technology for complex karst development foundation treatment.This technology can provide a reasonable technical reference for other karst foundation restoration projects.

关 键 词：岩溶地基 地基处理 注浆加固 

分 类 号：U213.14[交通运输工程—道路与铁道工程]