土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (5): 699-704.

• 工程实录 • 上一篇    下一篇

基于“跳仓法”施工的双排桩支护设计与施工

宋大伟1,朱一飞1,赖允瑾2   

  1. （1.江苏先行建设有限公司，江苏常州 213100;2.同济大学地下建筑与工程系，上海 200092）
  • 收稿日期:2023-08-17 修回日期:2023-09-06 出版日期:2025-10-31 发布日期:2025-10-30
  • 作者简介:宋大伟（1989-），男，助理工程师，研究方向为土木工程的建设和管理。

Design and Construction of Deep Excavation Supported by Double-Row Cantilever Piles (DCP) Using Sequential Method (SM)

SONG Dawei1, ZHU Yifei1, LAI Yunjin2   

  1. (1.Jiangsu Xianxing Construction Co. Ltd., Changzhou 213100;
    2.Geotechnical Engineering Department of Tongji University, Shanghai 200092)
  • Received:2023-08-17 Revised:2023-09-06 Online:2025-10-31 Published:2025-10-30

摘要： 江苏南沿江城际铁路武进站综合交通枢纽工程的地下汽车库基坑是一个超大型基坑，采用悬臂双排桩支护形式。为了减小基坑围护的位移，采用“跳仓法”开挖。“跳仓法”施工的理论基础是基坑开挖的时空效应理论，施工前必须确定适当的分仓宽度，以保证位移控制的有效性。针对“跳仓法”开挖的施工工艺，结合工程支护和地质情况，建立了相应的计算模型，就不同的跳仓分隔距离进行了计算分析。计算表明，存在一个跳仓分隔的临界距离，在临界距离以内，分隔越小，位移控制越明显；超出临界距离后，位移控制与分隔距离关系不大。


关键词: 跳仓法开挖, 双排桩支护, 深基坑, 悬臂支护

Abstract: The deep excavation of an underground parking lot at Wujin Station (namely Wujin Project), a comprehensive transportation hub which is an inter-city station of the south express railway alongside Yangtze River. The construction is a super-large one with footprint area of about 39,500 square meters, with an excavation depth of 11.2 meters and periphery of about 980 meters. The excavation is supported by the double-row cantilever piles (DCP) using sequential method (SM). The principle of the SM is based on the Space-time Effect theory. For a deep excavation project, it is very important to select a reasonable length of sequential block to control the displacement of the retaining wall. To minimize the displacement of the double-row-piles retaining wall, a sequential method is introduced for the excavation of Wujin Project, for which a calculation model is established to analysis cases with different length of sequential block with consideration of Wujin Project’s retaining wall and geological conditions. The result shows that there is a critical length (CL) and that when the length of sequential block is less than CL, the displacement of the retaining wall is very sensitive to the length of sequential, otherwise is irrelevant to it.

Key words: Sequential Method of Excavation, Double-Row-Piles Retaining Wall, Deep Excavation, Cantilever Retaining Wall

中图分类号: