Short-term deformation behavior model of endangered earthen heritage slope after conservation in Jiaohe Ruins

摘要

Cliff deformation behavior after conservation is of great significance for evaluating the conservation effect and discovering the dynamical law of soil.Modeling on deformation behavior is beneficial to the quantitative evaluation of interactions between soil mass and structures as well as the forecast.Based on cliff conservation engineering of Jiaohe Ruins (the largest raw soil heritage site in the world),data of horizontal deformation of the upper cliff were obtained by using Nanrui-made NDW-50 displacement device (precision:0.01 mm,frequency:15 min-1).Regression analysis indicates that deformation behavior models include exponential growth,linear growth and parabolic growth types,while daily deformation presents more intense periodicity (24 h).The deformation is less than 1.5 mm during monitoring period,which has no impact on the stability of cliff.Deformation behavior provides the mutual duress and interaction between soil and engineering intervention.In addition,deformation mode attaches tensely to the damage pattern of the cliff.The conclusions are of importance to the stability evaluation of the carrier along Silk Road.