市政技术2025，Vol.43Issue(5)：174-184,11.DOI:10.19922/j.1009-7767.2025.05.174
地铁车站立体异形复杂基坑变形控制研究
Research on Deformation Control of 3D Complex Irregularly-shaped Foundation Pits of Metro Stations
刘小波 1秦浩斌 1孙蒙蒙 1朱淼 1郭晓勇 1何国铜1
作者信息
- 1. 北京市政建设集团有限责任公司,北京 100089
- 折叠
摘要
Abstract
To evaluate the effectiveness of the composite support system combining annular concrete support and steel supports for the irregularly-shaped deep foundation pit at Phase Ⅰ of Xinghuo Station of Beijing Metro Line 3,a 3D finite element model was established by Midas GTS software to simulate the deformation characteristics of staged excavation.By automatic monitoring system,the data of retaining structures displacements,axial forces and soil de-formation were measured.The results demonstrated that the composite structure of annular concrete support and steel supports effectively constrained the pit deformation,with the maximum horizontal displacement of retaining piles of 26.3 mm,peak supports axial force of 599.78 kN,and external settlement/heave values of 18.7 mm and 23.69 mm respectively,all below-specified control thresholds;The deviation rate between numerical simulation and monitoring data was below 15％.The synergistic effects of the composite support system were furtherly con-firmed.During the process,the scheme successfully controlled the 3D deformation of the irregularly-shaped deep foundation pit through complementary spatial stiffness of annular supports,providing valuable references for similar engineering projects.关键词
立体复杂异形基坑/基坑变形/环形混凝土支撑/数值模拟Key words
3D complex irregularly-shaped foundation pit/foundation pit deformation/annular concrete support/numerical simulation分类
交通工程引用本文复制引用
刘小波,秦浩斌,孙蒙蒙,朱淼,郭晓勇,何国铜..地铁车站立体异形复杂基坑变形控制研究[J].市政技术,2025,43(5):174-184,11.
