北京某市政路杂填土路基处理方案研究与应用  

Study and Application of Miscellaneous Fill Roabed Treatment Scheme for a Municipal Road in Beijing

作　　者：郭帅 GUO Shuai

机构地区：[1]中冶京诚工程技术有限公司,北京市100176

出　　处：《城市道桥与防洪》2023年第5期53-56,M0008,共5页Urban Roads Bridges & Flood Control

摘　　要：随着城市的不断发展壮大,市政路网逐步由城区向郊区扩张,先建小区后修路的整体理念导致市政路中出现了各类杂填土地基。为保证路基的稳定性,需对杂填土地基进行处理。通过详细对比强夯法、换土垫层法、柱锤冲扩桩法、水泥粉煤灰碎石桩法4种路基处理的实用方法,最终确定采用换土垫层和柱锤冲扩桩结合的方式分段进行路基处理,并对路基处理后的地基承载力及沉降进行相关验算,同时提出相关路基处理方案的施工注意事项,不仅解决了实际工程中杂填土路基处理问题,还为类似的工程提供了参考借鉴思路。With the continuous development and expansion of city,the municipal road network gradually expands from the urban area to the suburbs.The overall concept of building community first and then building road leads to the emergence of various miscellaneous fill foundations in the municipal roads.In order to ensure the stability of the roadbed,the miscellaneous fill foundation needs to be treated.Through a detailed comparison of the four practical methods of subgrade treatment,such as the dynamic compaction method,the soil replacement cushion method,the column hammer punching and expanding pile method,and the cement fly ash gravel pile method,the method of combining the soil replacement cushion and the column hammer punching and expanding pile is finally determined to treat the roadbed by sections.The bearing capacity and settlement of the subgrade after the roadbed treatment are checked and calculated.The construction precautions related to the roadbed treatment scheme are put forward,which not only solves the problems in the treatment of miscellaneous fill roadbed in the actual project,but also provides the reference and ideas for the similar projects.

关 键 词：杂填土 路基处理 换土垫层 柱锤冲扩桩 

分 类 号：U416.1[交通运输工程—道路与铁道工程]