铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
5期
130-132,137
,共4页
地铁车站%深基坑%围护结构%数值模拟
地鐵車站%深基坑%圍護結構%數值模擬
지철차참%심기갱%위호결구%수치모의
Subway station%Deep foundation pit%Retaining structure%Numerical simulation
紧邻已建成地铁车站单侧基坑开挖卸载会引起车站结构不均匀变形，但目前对其变形机制还缺乏系统认识。结合长沙地区某地铁车站工程实例，基于数值方法对同深基坑开挖引起的紧邻地铁车站结构变形发展变化规律进行分析，并讨论有效控制车站结构变形的主要施工措施。研究结果表明，随着开挖深度的增加，地铁车站围护结构水平变形逐渐增大，且增长的幅度逐渐减小；地铁车站主体结构整体刚度较大，对由基坑开挖引起的土体变形传递具有遮拦作用。
緊鄰已建成地鐵車站單側基坑開挖卸載會引起車站結構不均勻變形，但目前對其變形機製還缺乏繫統認識。結閤長沙地區某地鐵車站工程實例，基于數值方法對同深基坑開挖引起的緊鄰地鐵車站結構變形髮展變化規律進行分析，併討論有效控製車站結構變形的主要施工措施。研究結果錶明，隨著開挖深度的增加，地鐵車站圍護結構水平變形逐漸增大，且增長的幅度逐漸減小；地鐵車站主體結構整體剛度較大，對由基坑開挖引起的土體變形傳遞具有遮攔作用。
긴린이건성지철차참단측기갱개알사재회인기차참결구불균균변형，단목전대기변형궤제환결핍계통인식。결합장사지구모지철차참공정실례，기우수치방법대동심기갱개알인기적긴린지철차참결구변형발전변화규률진행분석，병토론유효공제차참결구변형적주요시공조시。연구결과표명，수착개알심도적증가，지철차참위호결구수평변형축점증대，차증장적폭도축점감소；지철차참주체결구정체강도교대，대유기갱개알인기적토체변형전체구유차란작용。
Excavation of foundation pit on one side and removal of load may cause differential deformation of the underground structure of adjacent subway station, and its mechanism has not been systematically understood. With reference to the engineering of a subway station in Changsha, numerical method is employed to analyze the variations of subway station structure deformation induced by excavation of adjacent deep foundation pit, and counter measures are discussed to control the deformation of subway station structure. The results show that with the increase of excavation depth, the horizontal deformation of retaining structure gradually increases, while the amplitude of deformation decreases; and the large integral rigidity of the subway station main structure functions to retain the displacement transfer of soil induced by excavation of foundation pit.
