排水固结加固高速公路深厚软基工后沉降

结合广珠东线高速公路深厚软基堆载预压和真空联合堆载预压两现场试验段，应用固结、流变和损伤理论对路基工后沉降规律进行有限元分析。结果表明，下卧层的主固结压缩和整个路基的次固结压缩是高速公路路基工后沉降的主要组成，进行地基处理时必须控制工后沉降。

Study on post-construction settlement of thick soft roadbed improved by drainage-preloading

By using finite element method and theory of consolidation, rheology and damage, the post construction settlement of thick soft roadbed improved by surcharge preloading and vacuum surcharge preloading is calculated considering two in situ experiments in Guang Zhu Expressway. Calculation results show that the primary consolidation of underlying stratum and the second consolidation of roadbed are major factors of the total post construction settlement of expressway roadbed, so the post construction settlement must be controlled in foundation improvement.