土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (1): 8-12.

• 工程实录 • 上一篇    下一篇

长江漫滩地区高承压水突涌应急处理与技术研究——以南京江北新区某临江深大基坑为例

方庆1，2，马世强1   

  1. （1.江苏省岩土工程公司，南京 210019；2.江苏省地质局第一地质大队，南京 210042）
  • 收稿日期:2023-04-03 修回日期:2023-04-17 出版日期:2025-02-28 发布日期:2025-03-01
  • 作者简介:方庆（1987-），男，高级工程师，硕士，注册土木工程师（岩土），研究方向为岩土工程设计、施工。

Emergency Mitigation and of High-Pressure Artesian Water Inrush a Large Deep Excavation Project in Yangtze Floodplains at Jiangbei New District of Nanjing

FANG Qing1，2， MA Shiqiang1   

  1. （1.Jiangsu Geotechnical Engineering Company，Nanjing 210019；
    2.The First Geological Brigade of Jiangsu Geological Bureau，Nanjing 210042）
  • Received:2023-04-03 Revised:2023-04-17 Online:2025-02-28 Published:2025-03-01

摘要： 南京江北新区为国家级新区，建设江北新主城成为南京城市发展的主旋律，临江地层为典型的长江漫滩二元结构地层，上部存在20 m～30 m淤泥质土，下部存在深厚的粉细砂层、中粗砂、砾砂，地下水丰富，承压水头高，对深基坑工程具有极大的影响，特别是高承压水容易引发基坑突涌事故。以南京江北新区某深大基坑突涌成功抢险案例为背景，根据同一基坑突涌严重程度不同，采用不同的应急处理方法，并进行归纳总结与研究，可为长江漫滩地区工程突涌提供借鉴指导意义。

关键词: 承压水, 基坑突涌, 双液注浆, 钢护筒平衡水压法, 承压水逐级减压

Abstract: As the Nanjing Jiangbei New District is designated as a state-level new district, the development and construction of Yongjiang new Jiangbei main city has become one of the major projects in Nanjing’s urban development. The Linjiang stratum is a typical Yangtze River floodplain dual structure stratum, with the upper part of 20 m~30 m soft silty soil and the lower part of deeply deposited saturated fine sand, medium coarse sand and gravel sand with artesian high groundwater head, which has a great influence on the deep excavation projects. The high-pressure artesian groundwater is easily inducing the water intrusion hazard in deep excavation projects, which results in great economic losses to owners and the society. Based on a successful case history of mitigating a deep and large excavation intrusion in Jiangbei New District, different emergency treatment methods are adopted according to the different volumes of the intrusions in the excavated area. The mitigation results are summarized to provide technical reference for the similar engineering projects, especially in the Yangtze River floodplain areas.

Key words: Artesian Groundwater, Groundwater Intrusion at Deep Excavation, Double Liquid Grout, Steel Casing Balanced Water Pressure Method, Stepping Artesian Pressure Releasing

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