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深基坑被动区加固作为一种高效的变形控制措施，广泛应用于基坑支护设计，尤其在软土地区，被动区加固几乎不可或缺。以南京长江漫滩软土地区某深基坑工程为背景，结合土工试验与现场监测数据，对基坑施工全过程开展了三维精细化有限元分析，系统研究了4种不同加固形式及不同加固参数对基坑变形的影响。研究结果表明：被动区加固可有效控制基坑变形，控制效果由强到弱依次为满堂、裙边+抽条、裙边、抽条加固；随着加固效果的提升，围护结构最大侧移位置与坑外最大沉降位置向上并向坑内偏移；提高加固强度、增大加固深度均能增强加固土体对基坑变形的抑制作用，但抑制效果逐渐减弱；对基坑变形控制要求严格时建议采用满堂加固；需兼顾经济性时建议采用裙边+抽条加固；基坑规模较小时可采用裙边或抽条加固。
Abstract：Passive zone reinforcement in deep foundation pits is a highly effective measure for deformation control and is widely applied in foundation pit support design, especially in soft soil areas where it is almost indispensable. Based on a deep foundation pit project in the soft soil area of the Nanjing Yangtze River floodplain,combined with geotechnical tests and on-site monitoring data, a three-dimensional refined finite element analysis was conducted throughout the entire construction process of the foundation pit. The study systematically investigated the influence of four different reinforcement forms and various reinforcement parameters on the deformation of the foundation pit. The research results show that passive zone reinforcement can effectively control the deformation of the foundation pit, and the control effect from strong to weak is full hall, skirt + strip,skirt, and strip reinforcement. As the reinforcement effect improves, the maximum lateral displacement position of the retaining structure and the maximum settlement position outside the pit move upward and inward. Increasing the reinforcement strength and depth can enhance the inhibitory effect of the reinforced soil on the deformation of the foundation pit, but the inhibitory effect will gradually weaken. When strict control of foundation pit deformation is required, full hall reinforcement is recommended. When economic considerations are also important, skirt + strip reinforcement is suggested. For smaller foundation pits, skirt or strip reinforcement can be adopted.
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基本信息:
DOI：10.13291/j.cnki.djdxac.2026.04.012
中图分类号:TU753
引用信息:
[1]游欣雨,杜国文,刘恒娟,等.软土地区被动区加固对深基坑变形特性的影响研究[J].大连交通大学学报().DOI:10.13291/j.cnki.djdxac.2026.04.012.
基金信息:
国家自然科学基金资助项目(52178384)
2026-08-17
2026-08-17
2026-08-17