软土地基路堤工程信息化施工技术

建在软土地基上的路堤工程容易出现侧向滑移破坏，在实践经验之上发展路堤工程的信息化施工技术可以促进路堤的设计和施工水平．信息化施工的关键技术是反分析的优化方法、预测所采用的数值模型和变形控制标准．为此阐述了遗传算法、简化参数的耦合Biot修正剑桥模型和路堤变形控制标准，提出了路堤工程信息化施工技术流程图，结合一个工程算例进行验证，得出的预测结果与实际情况是吻合的．

Information-Oriented Construction Techniques for Embankments on Soft Soils

Embankments built on soft soils are inclined to fail. However, information-oriented construction techniques in combination with the experience can improve the design and construction of embankments. The key techniques of information-oriented construction include optimization methods for back analysis, numerical models for prediction, and deformation-controlled standards. Three parameters of Cam-clay model are statistically expressed by plasticity index respectively, and back analysis becomes more efficient. An empirical deformation-controlled standard, which is the ratio of the maximum lateral displacement increment under the slope of embankment to its central ground settlement increment, is proposed. Then a flow chart of information-oriented construction for embankments based on genetic algorithm is presented, by which an embankment case is verified, and the results of prediction well agree with that of the practice.