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Abstract:
A new metro station construction method, super pipe roof method (SPR), is proposed in this paper based on the analysis and summary of merits and demerits of existing construction methods. The most important feature of SPR is that it can realize subsurface excavation of metro station in deeply buried and water-rich condition without dewatering. The construction principle and procedure of SPR are described in detail by using double-storey and double-span with single column station model. SPR station is a new "framework like structure" and a complicated bearing system in vertical and horizontal. A metro station model is built by using finite element software, then deformation and stress of SPR station are analyzed. The results show that deformation of pipes is small and stress of longitudinal beams is far less than its ultimate stress when top-down method is adopted for excavating. And the stress of steel concrete permanent column and internal-support-beam is comparatively larger, extreme values appears in the junction of sidewall and bottom plate, while all the components of SPR structure can meet the strength requirements through calculation. Finally, waterproof system of SPR method is introduced and waterproofing method in circumferential and longitudinal is specified. © 2016, Editorial Department of Journal of Beijing Jiaotong University. All right reserved.
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Journal of Beijing Jiaotong University
ISSN: 1673-0291
Year: 2016
Issue: 3
Volume: 40
Page: 67-74
Cited Count:
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 6
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