某加筋土高填方边坡设计

Design of a High Fill Slope with Reinforced Soil

随着城市的不断发展,修建机场、垃圾场等大型基础设施往往会选择城市周边山区地区,对山体进行深挖高填以满足基础设施的场地和净空条件的做法会越来越常见。本文工程设计边坡为高度达60m、坡率为1:1.5的高陡边坡。边坡填料取自开山石渣,粒径较大,采用土工格栅加筋处理填料的措施先通过计算验证设计方案的可行性,后经近三年的现场监测,填方边坡的累计沉降值、累计水平位移值和最大日变化速率均满足相关规范要求,设计方法可行,希望为有限场地条件下边坡设计工程提供参考。

With the continuous development of the city,the large-scale infrastructure such as airport and garbage dump are always constructed at the mountainous areas around the city.It is becoming common to excavate and fill the mountain to build infrastructure.A high and steep fill slope engineering with 60m-high and a ratio of 1:1.5 was designed in this paper.Large size slags which take from mountain cutting project were used as filler,and the measures of dynamic compaction and geogrid reinforcement were adopted which were verified to be feasible based on the finite element analysis.According to the results of a nearly three years field monitoring,it was found that the cumulative value and the maximum daily change rate of settlement and the horizontal displacement met the requirements of relevant specifications.The design methods and measures in this paper should be referenced for other limited site condition engineerings.