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| RESEARCH ON SPACE ACTIVE EARTH PRESSURE BEHIND RETAINING WALL CONSIDERING SOIL ARCHING EFFECTS |
| LIN Qingtao，ZHU Jianming，KANG Yao |
| (College of Civil Engineering，North China University of Technology，Beijing 100144，China) |
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Abstract Research shows that soil arching effects is an important factor that affect earth pressure distribution of retaining wall，but the studies of space active earth pressure behind retaining wall considering soil arching effects is less. Through introducing soil arching effects principle into the space earth pressure calculation model making by Gu Wei-ci，we build the space earth pressure calculation model that considering soil arching effects，then divide the model into I、II、III、IV four regions，and establish horizontal and vertical static equilibrium differential equation of the level differential element that take in each region，and then deduced the calculation formula of space active earth pressure corresponding to each region，it can calculate active earth pressure anywhere behind retaining wall； also put forward the calculation method of resultant force and the position of it’s active point. We can see the distribution of space earth pressure behind retaining wall intuitively through numerical examples，it can be concluded that the existence of spatial effects will make active pressure behind retaining wall considering soil effects quite different from when retaining wall in plane strain state，meanwhile the active earth pressure behind both ends of retaining wall is much smaller than in plane strain state and it can be seen that the place of resultant force point of space active earth pressure is higher than in plane strain state，and the ratio of length and height B/H is smaller，the affect of spatial effects on the distribution of active earth pressure along retaining wall and the place of resultant force point is more.
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2015, Vol. 34 
