Soft clay roadbed has disadvantages of easy instability and large settlement.We take measures of pre-loading drainage plate to treat the roadbed accordingly.Based on equivalent sand-wall method and Cambridge model,a plane FEM model is established for pre-loading roadbed treatment in a sea reclamation engineering at Taizhou Bay.The influence of length and distance of plastic drainage plate on the loading velocity,the pre-loading time and the settlement amount under different loading heights are analyzed.The results show that the pre-loading time is significantly affected by the length of drainage plate;even road settlement occurred after pre-loading period,which ensures the construction quality.

曲线箱梁桥弯扭耦合的受力特点,使其容易出现支座脱空、梁体外移、翻转的问题。合理的支座布置形式可调节扭矩的分布,改善支座受力情况。以下结合工程实例,采用有限元法建立模型,分析不同支座布置方式下的支座反力分布问题,得出的结论可用于类似的匝道桥设计。