C diagonal brace as enclosure system, anchorage of H steel brace by post-insertion, Trestle-type excavation in layers and so on.

• 采用地下连续墙加钢筋混凝土斜撑作围护体系,以后插入法锚固H型钢立撑,栈桥式分层挖土等方案,保证了围护安全和基础施工质量。