齿坎式挡土结构物极限抗滑力研究

以齿坎式挡土结构物现场抗滑试验为研究对象，运用强度折减的有限元方法，研究了齿坎长度分别为0、0.7、1.0 m的挡土结构物的极限抗滑力和齿坎式挡土结构物的滑动破坏模式，以及位于软弱地基中齿坎在挡土结构物中的抗滑机理，提出了齿坎式挡土结构物的综合稳定性安全系数的概念。研究表明：理论研究结果能很好地表征现场试验成果；随着齿长的增加，齿坎式结构物由滑移破坏转变为倾覆破坏；强度折减的有限元方法进行挡土结构物的极限设计是完全合理的，该方法可应用于齿坎式挡土结构物的工程设计中。

Study of limit sliding resistance force on retaining structure with tenon

Based on the field tests of the retaining wall with tenon，strength reduction finite element method had been developed to analyze theoretically limit sliding resistance force of the retaining wall with tenon of 0.0m,0.7m and 1.0m length. The sliding failure mode of the retaining structure with tenon was studied. The sliding resistance mechanism of the tenon of the retaining structure in the soft ground had been researched. The integrated stability safety factor of the retaining structure with tenon was put forward. Research showed: the results of theoretical research could be a good characterization of field test results. The retaining structure with tenon was damaged from sliding into overturning with the increase of tenon length. The application of the strength reduction finite element method to retaining structures limit design is entirely reasonable; this method could be applied to the engineering design of retaining structures with tenon.