Stability Analysis of Masonry Structure in Angkor Ruin Considering the Construction Quality of the Foundation

摘要

Angkor ruin, one of the World Cultural Heritage in Cambodia includes many masonry structures in danger of collapse due to geotechnical problems. The foundation of the Angkor monuments is artificial soil embankment, so-called “rammed earth”, and its compaction quality affects significantly on the stability of the buildings. In this paper, to investigate the influence of the compaction quality of the rammed earth numerically, stability analyses of an actual building in Angkor (Prasat Suor Prat N1 Tower) were performed with NMM-DDA code, which is a discontinuum based numerical method. In order to treat the different mechanical behavior of rammed earth with different density (void ratio), the subloading modified Cam-clay model, a constitutive model for saturated overconsolidated soil, was also applied. The simulations were performed in two cases changing the initial density (void ratio) of the rammed earth, and then, its effect on the stability of the structure was discussed based on the simulation results.