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《Chinese Journal of Underground Space and Engineering》 2013-02
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Design of the Bolting-Grouting Supporting Structural Control Based on the Elastic-Plastic Model

Liu Fusheng1,Wang Lianguo2,Sun Lei 1,Dong Ganggang 1 (1.Water Conservancy and Civil Engineering College,Shandong Agricultural University,Taian,Shandong 271018,China; 2.College of Science,China University of Mining and Technology,Xuzhou,Jiangsu 221008,China)  
The supporting theories for soft rock engineering,including New Austrian Tunneling Method,the Combined Support Theory and the Surrounding Rock Loose Circle Theory,are widely used in the practical engineering,and significant performance results were achieved.But in the application process,the destructions of the roadway frequently occur,and the failure mechanism was not well comprehended.This paper,based on the ideal elastic-plastic bolting-grouting support model,systematically studied the relationship among the supporting force P0,the radius of the bolting-grouting area R1 and the radius of the bolting-grouting plastic area Rm.A design method of the supporting structure was put forward,and the calculation example shows that this method is practical and scientific.It is concluded that the bolt support force has little effects on the proportional relationship between the radius of the bolting-grouting area and the radius of the bolting-grouting plastic area.The bolting-grouting plastic area is solely based on the property of grouting material and the surrounding rock.At the same time,it could also provide a reference for the quantitative design of the supporting structure and construction.
【Fund】: 国家自然科学基金资助项目(50874103);; 山东省自然基金资助项目(Y2008F16)
【CateGory Index】: TD353
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