高路堤软基深部变形机理及位移响应规律

路基填筑不断增加的上部荷载超过软土上覆＂硬壳层＂极限应力,致使硬壳层应力扩散作用失效,软土地基强烈受压发生不排水固结,压缩量大,为路基提供了较大变形空间,导致高路堤发生推移式滑动鼓胀变形。必须停止路基填筑,立即实施抗滑桩对软土路基进行支挡防护。桩的位移结果表明：桩身已开始受力,变形小幅增加后趋稳定,累计位移量可控。

Law about Deformation Mechanism and Displacement Response of the Deep Section of High Embankment Soft Foundation

The upper load of roadbed increased more than the limit stress of the＂crust＂clay overlying on soft soil,stress diffusion effect failed,The strong compression of soft soil foundation had no drainage consolidation,Large amount of compression provided greater space for the subgrade deformation,which caused the sliding bulging deformation of high embankment.We must stop the subgrade filling,anti-slide pile was immediately implemented to protect the soft soil subgrade.The displacement of pile showed that the pile has begun to force,its’deformation increased slightly and tended to be stable,the total displacement is controlled.