沧黄高速公路桥头路基施工技术浅析及在施工中的几点体会

Elementary Discussion on Construction Technique of Roadbed at Head of Bridge along Cang-huang Expressway and Some Experience

为控制路桥沉降差和台后地基的工后沉降,沧黄高速公路桥头地基设计采用了水泥搅拌桩加土工格栅处理的方法。同时,为降低桥头地基的荷载和基础应力,减少沉降并增加填料的密实度,台背回填采用液态粉煤灰填筑。路面处理设置桥台搭板,这样可以使在柔性路堤上产生的较大沉降逐渐过渡至刚性桥台上,使车辆通过时的跳跃现象大为减少。

In order to control the settlement difference and settlement itself of groundbed after construction, ‘concrete ＋ Ⅰ grid’ is used in roadbed design of bridge head along Cang-huang expressway. At the same time, liquid coal ash is used in backfilling of abutment, so as to reduce the load and basic stress, reduce settlement and increase the dense of fillings. Bridge-board is used in pavement disposal, which makes large settlement generated by flexible embankment transit to rigid bridge board, and reduce the jumping phenomenon when vehicles running across.