地面出入式盾构隧道施工地表变形控制措施

Control Techniques for Ground Displacement Induced by Tunnelling Using Ground Penetrating Shield Technology

本文以上海市龙水南路越江隧道新建工程为背景,针对地面出入式盾构隧道施工过程中面临的工程重难点,提出了相应控制措施并进行监测。研究发现,采用壳体注浆、同步注浆和土仓保压技术可以有效控制盾构施工对地层的扰动。对于控制隧道上浮和地表变形,地面压重 + 满堂加固技术效果最佳,而地面压重 + 半堂加固技术效果有限。监测结果表明,这些控制措施能够有效减小施工对地表位移的影响。通过有针对性的控制措施和有效的监测手段,成功解决了龙水南路越江隧道新建工程的关键挑战,确保施工的安全性和效果,为类似工程提供了宝贵的经验和借鉴。

Based on the new construction of the Longshui South Road cross-river tunnel in Shanghai, this paper proposes the corresponding control and monitoring methods for the engineering difficulties faced during the tunnelling construction using the Ground Penetrating Shield Technology (GPST). It is found that the use of shell grouting, synchronous grouting and soil bin pressure preservation techniques can effectively control the disturbance of the ground by shield construction. For controlling tunnel uplift and surface deformation, the combination of ground compaction and full-tunnel reinforcement technique has the best effect, while the combination of ground compaction and half-tunnel reinforcement technique has limited effect. The monitoring results show that these control methods can effectively reduce the impact of construction on the surface displacement. Through targeted control measures and effective monitoring methods, the key challenges of the new construction of the Longshui South Road cross-river tunnel project have been successfully solved to ensure the safety and effectiveness of the construction.