路基弯沉增测软弱部位选点方法探讨

Study on Selection of Additional Weak Point to Measure Subgrade Subsidence

根据多年的试验检测经验 ,现在可靠性最强的弯沉检测方法———贝克曼梁法 ,属于跳越式检查 ,按现行规范检查频率较小 ,中间弯沉较大的点可能出现漏检现象 ,可能无法真实反映全段弯沉情况。针对这种情况 ,作者分三种方法做了对比检查分析 ,结果发现漏检现象比较严重 ,因而提出新的检测方法———增加两个有经验的技术人员在弯沉车两侧观察车轮接地点地面的下沉与回弹现象 ,发现异常立即将车倒回加点检查。该方法在基本不增加费用的前提下 ,可覆盖全段工程。

Subsidence of subgrade is an important indicator for subgrade strength and stability.The paper introduces an on-board deflection measuring method of random selection of additional weak points,based on conventional measuring method,for the purpose to find out hidden quality defects;so that proper remedy measures to be taken to ensure quality work.