浅埋隧道施工对邻近桩基的影响与加固措施  

Influence of shallow tunnel construction on adjacent pile foundation and reinforcement measures

作　　者：张江涛 蒲振华 张玉栋 李权超 江杰[2] 危登涛 Zhang Jiangtao;Pu Zhenhua;Zhang Yudong;Li Quanchao;Jiang Jie;Wei Dengtao(China Railway Tunnel Bureau Group Construction Co.,Ltd.,Nanning 530003,Guangxi,China;School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China)

机构地区：[1]中铁隧道局集团建设有限公司,广西南宁530003 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《岩土工程技术》2025年第1期55-62,共8页Geotechnical Engineering Technique

基　　金：国家自然科学基金资助项目(52068004);广西科技计划(桂科AC20238002)。

摘　　要：为了研究浅埋隧道施工对邻近桩基的影响与加固措施,依托芦澳路下穿马青路工程建立了有限元模型。分析了浅埋隧道开挖引起的地表沉降以及桩基的变形和内力,发现桩基的最大水平位移(3.63 mm)超过了变形控制指标(3 mm),并对邻近桩基的内力产生了较大影响;在此基础上提出了注浆加固的保护措施,并对比分析不同加固深度的保护效果。研究结果表明:对桩基周围土体进行注浆加固,可显著降低桩基的变形和内力,当注浆加固深度为15 m时,可取得较佳的效果;通过与现场监测数据对比,验证了模型的可靠性与加固措施的合理性。To study the influence of the shallow tunnel construction on the adjacent pile foundation and the reinforcement measures,this research relies on the Lu’ao Road underpassing Maqing Road project to establish a finite element model.The surface settlement caused by shallow tunnel excavation and the deformation and internal force distribution law of the pile foundation were analyzed.It was found that the maximum horizontal displacement of the pile foundation(3.63 mm)exceeded the deformation control index(3 mm)and had a large impact on the internal force of the adjacent pile foundation.The protective measures of grouting reinforcement were proposed,and the protective effects of different reinforcement depths were compared and analyzed.The results show that grouting reinforcement of the soil around the pile foundation can significantly reduce the deformation and internal force of the pile foundation,and better results can be achieved when the depth of grouting reinforcement is 15 m.The reliability of the model and the rationality of reinforcement measures are verified by comparing them with the field monitoring data.

关 键 词：浅埋隧道 邻近桩基础 加固措施 数值模拟 

分 类 号：TU452[建筑科学—岩土工程]