深层夯扩渣土桩在市政道路的应用

Application of Deep Ramming and Expanding Muck Pile in Municipal Road

在市政道路建设过程中,经常会遇上成片的杂填土回填区域。常规办法是对杂填土进行开挖换填、重锤强夯等方式来处理。但对于杂填土较深的情况,考虑到场地环境,环保等因素的影响,换填及强夯等方案不适宜在城市开展。深层夯扩渣土桩是一种经济有效的杂填土处理方式,可回收利用建筑垃圾,处理深度大,对环境影响小。结合郑州市大学南路辅道路基处理实例,通过比选论证,确定深层夯扩渣土桩为深杂填土处理方案,并确定了渣土桩的设计参数,以供同行参考。

In the process of municipal road construction,patches of miscellaneous fill backfill areas are often encountered.Conventional method is to excavate and replace the miscellaneous fill and deal with it by heavy hammer dynamic compaction.However,for the deep miscellaneous fill,considering the influence of site environment,environmental protection and other factors,it is not suitable for cities.Deep ramming and expanding muck pile is an economic and effective treatment method of miscellaneous fill.It can recycle construction waste,has a large treatment depth,and minimize impact on the environment.Combined with the subgrade treatment example of auxiliary road of South University Road in Zhengzhou,the deep rammed and expanded muck pile treatment scheme of deep miscellaneous fill was determined through comparison and demonstration,and the design parameters of muck pile are determined for reference.