一种土基承载能力快速检测的新方法

A New Method for Rapid Detection of Subgrade Bearing Capacity

为了解决机场大规模土方施工过程中土基承载力检测方法效率低下的问题,提出了一种利用动态冲击技术进行土基承载能力快速测试的方法。该方法以落锤式弯沉仪为研究对象,通过理论分析和数值模拟确定与规范中承载板试验等效的落锤高度,采用此高度并结合实际的加载设备和土质条件在国内某机场的土基承载力试验段开展了比对试验,建立了动-静荷载作用的对比曲线,并通过大量实际的现场工程检测结果进行了验证。结果表明,采用落锤式弯沉仪进行土基承载能力测试具有较好的工程可行性,且操作简单迅速,有着较好的实际应用前景和推广价值。

To overcome the inefficiency in detecting subgrade bearing capacity in airport earthwork′s construction,a new method for rapid detection of subgrade bearing capacity is proposed. Base on falling weight deflectometer,the falling weight height,which effect is equivalent to bearing-plate test,is determined by theoretical analysis and numerical simulation in the paper.Comparative test is carried out in the test section of a domestic airport with specific loading equipment and soil conditions.The dynamic-static loads contrast curve which is established by a large number of actual field engineering tests,is proved to be valid.The result shows that the proposed approach can be applied to detect subgrade bearing capacity rapidly and effectively.