公路路基挖方段软弱路槽的处治方法  

Treatment method of weak groove in excavation section of highway subgrade

作　　者：梁国烯 Liang Guoxi(Poly Changda Engineering Co.,Ltd.,Guangzhou 510620,China)

机构地区：[1]保利长大工程有限公司,广东广州510620

出　　处：《山西建筑》2022年第4期120-122,共3页Shanxi Architecture

摘　　要：为解决如何快速确定挖方段软弱路基换填深度的工程实际问题,总结了确定路基工作区弯沉不达标处治方案的思路,并基于模量等效的原则,采用HAPDS2011软件进行了计算,得到以传统石屑作为回填材料的不同顶面模量的路基换填深度,结果表明:开挖后路床顶面弯沉值不大于423 mm,则换填不大于30 cm的压实石屑材料即可;开挖后路床顶面弯沉值不大于466 mm,则换填不大于50 cm的压实石屑材料即可;当开挖50 cm后路床顶面弯沉值仍大于466 mm时,考虑厚度较大会增加回填难度及压实效率等问题,宜选择碎石等模量更高的回填材料。最后分别针对挖方段路槽回填土质不良、地下排水不畅以及土质不良与地下排水不畅复合作用下导致路槽顶面弯沉不达标的工程问题,提出了有针对性的处治方案。In order to solve the engineering problem of how to quickly determine the replacement depth of the weak subgrade trench in the excavation section,this article summarizes the ideas for determining the subgrade trench treatment depth,and based on the principle of modulus equivalence,using the HAPDS2011 software to carry out the calculation.The replacement depth of subgrade with different top surface modulus using traditional stone chips as the backfill material.The results show that:after excavation,the deflection value of the top surface of the road bed is less than or equal to 423 mm,then replace it with compacted stone chips material of≤30 cm;after excavation,the deflection value of the top surface of the road bed is less than or equal to 466 mm,then replace it with a compacted stone chip material of≤50 cm;when the deflection value of the top surface of the road bed is still more than 466 mm after the excavation of 50 cm,the larger thickness will increase the difficulty of backfilling for issues such as compaction efficiency,crushed stone and other backfill materials with higher modulus should be selected.Finally,aiming at the problem of unqualified road groove deflection caused by either poor soil quality or groundwater drainage problems and the combination of the two factors,a targeted treatment method was proposed respectively.

关 键 词：路基 回弹模量 弯沉 

分 类 号：U416.1[交通运输工程—道路与铁道工程]