非等强注浆及其在地铁穿越工程的应用  

Non-equal strength grouting and its application in subway crossing construction

作　　者：翟庆生 黄明利[1] 潘政 ZHAI Qingsheng;HUANG Mingli;PAN Zheng(Key Laboratory of Urban Underground Engineering of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学城市地下工程教育部重点实验室,北京100044

出　　处：《辽宁工程技术大学学报（自然科学版）》2022年第3期208-212,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点研发计划项目(2018YFC0808701)

摘　　要：为更好解决地铁穿越施工变形问题,提出新型非等强注浆的方法.分析非等强注浆效果,研究注浆方式、注浆强度和注浆厚度对地表沉降和差异沉降的影响.将非等强注浆应用于实际生产,分析桥桩的位移和不均匀沉降.研究结果表明:非等强注浆更有利于控制地表沉降和差异变形,使地表沉降槽曲线趋于平缓.注浆结构体强度越高、注浆层中央注浆体宽度越大、注浆体厚度越大,越有利于控制地表沉降.非等强注浆加固方法应用在实际工程中,可实现地层和既有结构的协调变形.In order to better solve the problem of deformation in subway crossing construction,a new non-equal strength grouting method is proposed.The application effect of non-equal strength grouting is analyzed.The effects of grouting method,grouting strength and grouting thickness on surface settlement and differential settlement are studied.Non-equal strength grouting is applied to the actual production to analyze the displacement and differential settlement of bridge piles.The results show that non-equal strength grouting is more conducive to control the surface settlement and differential deformation,and make the settlement trough curve incline to be flat.The higher strength of the grouting structure,the larger width of the central grouting layer,the greater grouting thickness,and the more conducive to control the surface settlement.The non-equal strength grouting can be applied to the actual project to realize the coordinated deformation of stratum and existing structure.

关 键 词：非等强注浆 地表沉降 地表变形 协调变形 变形控制 

分 类 号：U231.3[交通运输工程—道路与铁道工程]