巨粒土高填路堤现场填筑试验研究

 对重要的路堤填筑工程，国内目前一般都采用试验段法来确定填筑施工参数，已取得良好的效果。通过对河南S325侯饭线巨粒土高填路堤现场填筑试验，采用沉降量、灌水法以及弯沉等多种方法对路基质量进行检测对比，探讨巨粒土的压实机制以及颗粒级配、含水率、碾压机械、铺土厚度以及碾压遍数等不同施工工艺参数及不同参数的组合对压实效果的影响，提出巨粒土现场压实质量控制应以沉降差为主，并结合施工工艺参数的方法来控制，该法可有效保证填筑质量，加快施工进度，并可对类似工程的质量控制、检测和评价提供参考，具有重要的实用价值。

RESEARCH ON FILLING TEST OF HIGH EMBANKMENT WITH OVER COARSE-GRAINED SOIL

The criteria for evaluation of compaction quality and the mechanical properties of over coarse-grained soil are not clearly. These problems hindered its farther project application. At present，test section method is often adopted to determine parameters of important filling construction and well effect is obtained. In order to adapt the needs of project development，the compaction mechanism and the influence of different construction technological parameters such as grain composition，water content，construction machinery，filling thickness and compaction times etc. are discussed by the field roller compaction test depending on a embankment project of S325 highway in Henan Province. On the basis of the test，the optimal technological parameters and quality control specification of the given project are found by contrast tests for which various detection methods such as compaction settlement，watering method and flexure are adopted. And field compaction quality control method of over coarse-grained soil is put forward，namely，differential settlement is given priority but construction technological parameters must be considered at the same time. The method may insure filling quality effectively and quicken construction progress. And it also can provide scientific data，standards for the quality control，quality check，quality evaluation of the projects for which over coarse-grained soil is adopted as filling material. It has significant applicable value.