路基沉陷预计及其安全性评估

1 INTRODUCTION The underground-excavated rooms are formed after constructing underground projects，mining me-tallic and non-metallic ore and taking out excessively groundwater. The ground subsidence is caused as a result of underground excavation. A roadbed sub-sidence (including stations，bridges，tunnels，road-bed，upper buildings，signal system and so on) is caused by the ground subsidence. The security of railway transportation is greatly threatened due to ground subsidence caused by…

Roadbed Subsidence Prediction and Its Security Evaluation

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.