STUDY ON AND APPLICATION OF COVERED TOP-DOWN EXCAVATION IN COMPREHENSIVE TRANSPORTATION HUB ENGINEERING
Considering the special geographical location and geological conditions of the comprehensive transportation hub project of Beijing Sub-Center Railway Station,covered top-down excavation was performed during the construction of underground structures.Firstly,the construction method for underground structural engineering was described.Key and difficult points of covered top-down excavation was analyzed based on engineering conditions and a reasonable and efficient construction sequence was determined for covered top-down excavation.Secondly,earthwork excavation,foundation pit dewatering and foundation pit monitoring involved in covered top-down excavation were improved for higher engineering efficiency and safety.Additionally,foundation construction with tower cranes were improved by using a steel pipe pile type concrete pedestal as a tower crane foundation.Finally,BIM and AR technologies were applied based on covered top-down excavation to advance the development of covered top-down excavation engineering.
covered top-down excavationsub-center hub engineeringtower crane foundation construction
万方数据
维普
