东非地区沼泽土路基施工处理方法研究--以乌干达波特尔堡-希马公路项目为例

Study on construction treatment method of swamp subgrade in East Africa

从分析沼泽土的工程特性、危害和国内常见处理方法出发,通过乌干达波特尔堡-希马公路改建项目采用抛石挤淤法处理常年性沼泽路基的工程案例阐述该项目沼泽路基处理方案选用与施工。现场静载试验检测点极限竖向承载力达到承载力特征值2倍左右和现场堆载试验最大沉降量为200 mm可验证处理后路基承载力和变形符合要求。

This paper analyzes the engineering characteristics,hazards and common treatment methods of swamp.Based on the case of perennial swamp treatment by crowded silting by riprapping in Fort Portal to Hima Highway reconstruction project in Uganda and the selection and construction of swamp treatment scheme of the project are described.The ultimate vertical bearing capacity of the detection points in the field static load test is about 2 times of the characteristic value of the bearing capacity and the maximum settlement of field loading test is 200mm.It can be verified that the bearing capacity and deformation of subgrade meet the requirements after treatment.