高速公路下伏浅层老采空区强夯置换试验研究

采空区是指地下矿产被采出后留下的“空洞区”。迄今对浅层老采空区上建高速公路一类重大工程的研究较少,研究浅层老采空区上建设高速公路的工程地质适应性、质量控制及施工工艺具有重要意义。结合常吉高速公路工程，从设计处理要求、治理范围、治理方案对比优选、强夯置换现场试验分析、施工组织工艺设计等几个方面，对浅层老采空塌陷区强夯置换治理技术进行了研究，研究结果表明，强夯置换治理此类工程效果显著。

An experimental study of dynamic compacting replacement treatment of an old workingout section in the underlying stratum of expressway

The working out section refers to the cavity where the mines in this area has been excavated.Up to now, a few of studies about constructing expressway above the ground of old shallow workingout section have been implemented. And the analysis of the suitability of engineering geology, quality control and construction technology has great significance for this special engineering. Combining with the practice of Changde-Jishou expressway, the treatment technology of dynamic compacting replacement for old shallow workingout section includes the requirement of design and treatment, treatment scope, project selection and in-situ test analysis of dynamic compacting replacement which are analyzed and evaluated carefully. Therefore, the construction organization design for constructing expressway above the old-shallow march is raised in this paper. The findings indicate that the dynamic compacting replacement for this kind of engineering is reliable.