Roadbed Subsidence Prediction and Its Security Evaluation
Li Yongshu 1，Han Liping 2
(1 School of Civil Eng.，Southwest Jiaotong University，Chengdu 610031 China) (2 School of Computer and Comm. Eng.，Southwest Jiaotong University，Chengdu 610031 China)
Abstract：A roadbed subsidence pattern for predicting the security of roadbed in ground subsidence area with complicated structure strata and any shape of excavations is proposed in this paper. The methods for computing the values of the movements and deformations of the roadbed characteristic points are investigated. The calculating formulae for predicting the roadbed subsidence，inclined deformation，curvature deformation，horizontal displacement and horizontal deformation are provided. The methods for evaluating roadbed security and predicting disastrous accidents of roadbed in ground subsidence area are also discussed. Finally，a practical example is given for applying the method to evaluate roadbed security.
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2002, Vol. 21 
