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结合具体工程实例,分析“土钉喷锚+混凝土灌注桩+预应力锚索+钢管内支撑”支护形式在地铁车站明挖基坑支护应用中的特点及原理,论证了地铁车站深基坑采用复合围护结构的可行性,同时也阐明了施工过程中的控制要点、与一般围护结构性能的对比。
Combined with the specific engineering examples, the paper analyzes the characteristics and principle of the application of “soil nailing anchor + concrete pouring pile + prestressed anchor cable + steel pipe support” in the open pit excavation support application of subway station, and demonstrates that the subway station The feasibility of adopting composite enveloping structure for deep foundation pit is also illustrated. At the same time, the control points in the construction process are clarified, which are compared with those of general enveloping structure.