CALCULATION METHOD OF INNER FORCE AND DISPLACEMENT OF SOIL-NAILING WALL CONSIDERING DEFORMATION COORDINATION
WEI Huanwei1,HAN Xuemin2
(1. School of Civil Engineering,Shangdong Jianzhu University,Jinan,Shandong 250101,China;
2. Shandong Province Inv. and Surv. Institute or Urb. and Rur.,Construction,Jinan,Shandong 250031,China)
Abstract:Inner force of soil-nailing wall mainly includes axial force of nail,shear force between soil and nail,and distribution force of composite facing. The process of soil-nailing wall deformation is the process of distortion coordination and interaction of several factors among nails,composite facing and soil mass. Traditional calculation model based on moment equilibrium can not give a reasonable explanation of relationship between inner force and deformation of soil-nailing wall. Through analysis of the mechanism of force and deformation of soil-nailing wall,lateral displacement of soil mass under combination of virtual excavation stress and shear force between soil and nail by Mindlin solution is calculated,by combing with linear relationship between shear force and relative displacement with zero shear force at potential sliding plane,axial force of soil nail,shear force between soil and nail and deformation at excavation surface can be calculated. Parts beyond limited value for shear force of nail in passive area is transferred to composite facing,and its incremental force is assumed as triangle distribution. And then distribution force of composite facing is obtained according to static equilibrium. Finally,the measured data from three projects of soil-nailing wall are used to illustrate the validity of the calculation model.
杨明华,黄宏伟. 基坑支护土钉力的简化增量计算法[J]. 岩土力学,2004,25(1):15-19.(YANG Minhua,HUANG Hongwei. Simplified incremental calculation method of soil nail forces for retaining and protection of foundation pits[J]. Rock and Soil Mechanics,2004,25(1):15-19.(in Chinese))
[7]
魏焕卫,宋丰波,杨 敏,等. 基于明德林解的土钉内力计算方法[J]. 岩土力学,2011,32(增1):6-15.(WEI Huanwei,SONG Fengbo,YANG Min,et al. Calculation model of inner force of soil nail based on Mindlin solution[J]. Rock and Soil Mechanics,2011,32(Supp.1):6-15.(in Chinese))
[8]
陈肇元,崔京浩. 土钉支护在基坑工程中的应用[M]. 北京:中国建筑工业出版社,2000:19.(CHEN Zhaoyuan,CUI Jinghao. The application of soil nailing supporting in the foundation pit[M]. Beijing:China Architecture and Building Press,2000:19.(in Chinese))
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