岩土与地下工程 2025年 第卷 第22期

DOI: 10.7672 / sgjs2025220055

浅覆土软弱地层大直径顶管技术研究

杨富强¹,江慧²,施笋¹,姚韦靖²

作者简介：

杨富强，高级工程师，E,mail:henry7803161@ 126. com

作者单位：

1.北京住总集团有限责任公司，北京 100101; 2.安徽理工大学土木建筑学院，安徽淮南 232001

基金项目：

∗安徽省住房城乡建设科学技术计划（2023,YF048）；安徽省博士后科研项目（2024C943）；淮南市科技计划（2023A313）

摘要：

顶管掘进断面为软弱地层，不易控制顶管姿态，研发了工具管姿态可调整顶进系统，将试验段的高程偏差和中线偏差分别控制在~16—— 6mm 和 2—— 16mm.针对阻碍工具管切土顶进的废弃管道，研发了大直径人工顶管可伸缩式主动支护装置，为顶进前方地下障碍物的清除施工提供安全的作业空间。研究结果表明，顶管施工时地表沉降受注浆压力影响，注浆压力取 0.1MPa 时，地表沉降控制效果良好；沿顶管顶进方向，地表沉降位移逐渐增大并趋于稳定；沿水平方向，地表的横向位移沉降曲线呈正态分布，且顶管顶进对土体的横向扰动范围为~10 —— 10m.顶管施工时，地面行车荷载对土层的横向位移影响不大，但加剧了土层的竖向位移，端头注浆加固可以改善土层软弱特质。
地下工程；顶管；软弱地层；障碍物；沉降；数值模拟；注浆压力

English：

Aiming at the difficulty of controlling the jacking attitude during the jacking process due to theweak stratum such as silt fill, fine silt and silt, a tool pipe attitude adjustable jacking system wasdeveloped to control the elevation deviation and midline deviation of the test section within -16 —— 6mmand 2 —— 16mm respectively. A large,diameter manual pipe jacking active retractable support device wasdeveloped to provide a safe working space for the removal of underground obstacles in front of thejacking. The numerical simulation results show that the surface settlement is affected by the groutingpressure during pipe jacking construction. When the grouting pressure is 0.1MPa, the surface settlementcontrol effect is good. Along the jacking direction, the ground settlement displacement increases graduallyand tends to be stable. The lateral displacement and settlement curve of the surface along the horizontaldirection presents a normal distribution law, and the lateral disturbance range of the soil is -10 —— 10m.During pipe jacking construction, the driving load on the ground has little effect on the lateraldisplacement of the soil layer, but aggravates the vertical displacement of the soil layer.