应用研究 2025年 第卷 第08期

DOI: 10.7672 / sgjs2025080092

富水砂层大直径双顶管下穿对既有箱涵变形的影响

任亮¹,叶雄明²,黄超¹,周书东²,杜涛²,陈小丹³

作者简介：

任亮，高级工程师，E-mail: come_renliang@ 126. com

作者单位：

1.中国电建集团中南勘测设计研究院有限公司，湖南长沙 410014;2.东莞市建筑科学研究院有限公司，广东东莞 523809;3.广东省水利水电科学研究院，广东广州 510610

基金项目：

∗ 广东省住房和城乡建设厅科技创新计划项目（2021-K35-301789）

摘要：

为研究富水砂层大直径双顶管下穿对既有箱涵变形的影响，以东莞市石马河-小海河水体连通工程为背景，采用有限元软件 MIDAS GTS / NX 建立三维数值模型，分析沉井及顶管施工全过程对既有箱涵的变形影响。通过总结既有箱涵变形特征，并将模拟分析结果与工程监测数据进行对比，验证了数值模型的可靠性。结果表明，在沉井及顶管施工过程中，箱涵结构最大水平位移为 1.38mm,最大竖向位移为~2.19mm,均满足控制标准；最大水平位移和最大竖向位移均发生在顶管下穿箱涵的横断面处，且距离顶管越远，箱涵结构变形越小；三期箱涵变形比二期箱涵小。
地下工程；富水砂层；顶管；箱涵；数值模拟；监测

English：

In order to study the influence of large-diameter double pipe jacking undercrossing in water-rich sand layer on the deformation of existing box culvert, taking Dongguan Shima River-Xiaohai Riverwater connection project as the background, a three-dimensional numerical model was established byusing the finite element software MIDAS GTS / NX to analyze the influence of the whole process of caissonand pipe jacking construction on the deformation of existing box culvert. By summarizing the deformationcharacteristics of the existing box culvert, and comparing the simulation analysis results with theengineering monitoring data, the reliability of the numerical model is verified. The results show thatduring the construction of caisson and pipe jacking, the maximum horizontal displacement of box culvertstructure is 1.38mm, and the maximum vertical displacement is - 2.19mm, both of which meet thecontrol standards. The maximum horizontal displacement and the maximum vertical displacement occur atthe cross section of the box culvert under the pipe jacking, and the farther away from the pipe jacking,the smaller the deformation of the box culvert structure. The deformation of the third-stage box culvert issmaller than that of the second-stage box culvert.