回填块石土强夯施工工艺的确定及设计优化

Determination of Dynamic Compaction Construction Process with Gravel Soil Backfill and the Design Optimization

摘要:

以华能莱芜电厂百万机组“上大压小”扩建工程填方区回填块石土强夯地基处理试夯试验为例，比对2个试夯分区采用不同施工工艺施工的质量差别及处理效果，据此查明强夯法的施工质量，确定强夯有效加固深度、土的密实度、变形参数和地基承载力等。根据场地夯填厚度，选取合适的虚填厚度及相应的施工工艺，确定最终施工方案，进一步提高强夯地基处理效果，为最终确定大面积施工所采用的施工工艺提供依据。

Abstract:

By the case of tamping test of dynamic compaction ground treatment with gravel and soil backfill in Laiwu 1000MW class power unit of Huaneng power plant, the construction quality difference and the treatment effects in 2 trial tamping areas with different construction processes are compared. On this basis, the construction quality, effective consolidation depth, soil compactness, deformation parameters and bearing capacity of the ground are found. According to the field tamping and backfill depth, the pre-placed depth and corresponding construction process are selected to determine the final construction plan for the further improvement of effect in dynamic compaction ground treatment, which provides an effective basis for large-area dynamic compaction with backfill and the finalized construction process.