Abstract：Research purposes: The sectional size and reinforcing bar of the common reinforced concrete underground structure will increase with increase of its span. The member of the common reinforced structure is difficult to meet the structure security demands when its span increases to a certain sense. It is necessary to research the design process of the prestressed structure and the calculation model and introduce the prestressed reinforced concrete into the design of the underground structure in order to make the underground spacial structure bigger and deeper. Research conclusions: (1) In the frame system, the two - way prestressed beams are easy to produce the large secondary internal force to largely increase the stress to the beam - column node and at the same time, the number of beam prestressed bars will substantially increase, so it is difficult to control the construction process. (2) Therefore, in the large - span underground structure, application of the prestressed beams and the common concrete stringers frame system mode not only makes the load transfer simpler and clearer and makes the load bearing of the structure more reasonable, but also makes the structure more economic. (3) The research can provide the reference to the design of large span underground structure.
Yuan Luyi, Bao Weigang. The Examples of Application of " Design Specifications of the Highway Reinforced Concrete and the Prestressing Force Concrete Culverts of Bridges" [M] . Beijing: China Communications Press, 2005.
[5]GB 50010—2010,混凝土结构设计规范[S].
GB 50010—2010, The Code for Design of Concrete Structures [S] .
[6]JTG D62—20040,公路钢筋混凝土及预应力混凝土桥涵 设计规范[S].
JTG D62—20040, The Highway Reinforced Concrete and the Prestressing Force Concrete Design of Bridges and Culverts [S] .
Cao Dengwu, Chen Yangui. The Analysis on the Design of Large - span Two - way Orthogonal Part of the Prestressed Concrete Beam [J] . Building Structure, 2009 (4) ：39-42.
Xu Huaxuan. Discussiong on the Measures for Guaranteeing Effective Prestress of Vertical Prestressed Reinforcement of Box Girder Bridge J] . Journal of Railway Engineering Society, 2010 (3) :62 -65.
2013, Vol. 30 
版权所有 © 2014 《铁道工程学报》编辑部