山东建筑大学学报2026，Vol.41Issue(1)：27-34,8.DOI:10.12077/sdjz.2026.01.004
地铁明挖上接增层施工既有车站及围护结构变形规律研究
Study on the deformation law of existing stations and enclosure structures in the construction of additional layers on the subway cut-and-cover construction station
摘要
Abstract
When a zero-distance open-cut excavation is conducted above an existing underground structure,excavation-induced unloading can cause significant deformation of both the existing structure and the retaining system.To clarify the deformation behavior induced by the zero-distance excavation,the Pingguoyuan Station of Beijing Metro Line 6 was taken as a case study,and a combined approach of field monitoring and numerical simulation was adopted.The deformation mechanisms of the existing station and the retaining structure during the excavation were systematically analyzed.The results indicte that:with the increase of the excavation depth,the station roof exhibits a nonlinear accelerated uplift,while the horizontal displacement of the retaining structure shows pronounced abrupt variations.To control the uplift of existing station,measures including lateral soil grouting to increase resistance,zoned excavation,and connection between pile foundations and the station base slab were proposed,successfully limiting the maximum uplift to 2.82 mm.For displacement control of the hanging piles,embedding the pile bases into the existing station combined with reserving counter-pressure soil was shown to effectively restrain pile-base displacement and mitigate pile sliding tendencies.关键词
地下工程/既有车站/零距离近接/明挖基坑/位移控制Key words
underground engineering/existing subway station/zero-distance proximity/open-cut foundation pit/displacement control分类
建筑与水利引用本文复制引用
吴圣智,邢成,张莹,李海峰..地铁明挖上接增层施工既有车站及围护结构变形规律研究[J].山东建筑大学学报,2026,41(1):27-34,8.基金项目
山东省自然科学基金项目(ZR2020QE265) （ZR2020QE265）
