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| Research on the Structure Design and Mechanics Analysis of the Precast Pile-retaining Wall for Metro Station |
| LU Lin-hai1, WANG Guo-fu1, WANG Wan-ting2, XU Qian-wei2, WANG Yong-ji1 |
| (1. Jinan Rail Transit Group Co. Ltd, Jinan,Shandong 250101, China; 2. Tongji University, Shanghai 201804，China) |
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Abstract Abstract：Research purposes： Compound wall and composite wall are typical structures of deep foundation pits supported by permanent structures of metro station, which have been developed in recent years and widely used in the foundation pit construction of metro station. Taking the assembly station of the West Yanmazhuang Station of the R1 line in Jinan city as project background, a series of calculations are carried out on this new structure system according to the principles of composite wall and compound wall respectively, and the stress and bearing capacity of the main structure and the support structure under the condition of self-weight and water reaction are analyzed and compared to deiermine the suitable scheme and calculation method of station foundationpits supporting struture. Research conclusions： (1) In the form of composite wall structure, it is necessary to pay attention to the stress condition and bearing capacity of the main structure midspan floor, bearing and midspan roof. (2) The new form of compound structure by means of linking the inner wall of main structure and the prefabricated piles can effectively transfer shear force and bending moment, which means that the prefabricated pile can integrate with the main structure as a whole to have good bearing capacity. (3) The use of prefabricated pile-wall compound structure can not only reduce the thickness and reinforcement bar of the inner wall, but also achieve the purpose of environmental protection and energy conservation under the premise of meeting the requirements of structure loading capacity. (4) The research conclusions can provide theoretical support and technical reference for the selection of supporting structure type of metro station foundation pits.
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Received: 27 March 2017
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2017, Vol. 34 
