Abstract

Info

Author(s):: ZHU Yan-peng; CAI Wen-xiao; YANG Xiao-hui; Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology

Keywords:: single point settlement gauge; high embankment; prediction model; post-construction settlement; combination model

Abstract:: The settlement laws of high embankment on LanzhouYongjing expressway in soft soil area were analyzed through insite measuring data by single point settlement gauge. Four kinds of settlement forecasting models including exponential model, power model, hyperbolic model and logarithmic model were established and the forecasting values and measuring values of settlements were compared. Based on this, combination model of index model and hyperbolic model was established. The results show that exponential model and hyperbolic model are relatively accurate in the four kinds of models, the forecasting curves of combination model of index model and hyperbolic model agreed with the measuring curves, and the error sum of squares is 22.789 mm², which satisfy the need of engineering, the postconstruction settlement of high embankment will finish within about 730 d, the forecasting final settlement is 60.44 mm.