填石路堤压实质量无损快速检测技术

Non-destructive Rapid Detection Technology of Compaction Quality of Rock-filled Embankment

以广连高速TJ09标段路堤填筑为例,对填石路堤施工过程中的铺筑方法及压实质量检测与控制进行研究,提出填石路堤不同层位的压实方案。现场分别采用灌水法、无核密度仪测定孔隙率,并在路堤埋设单点沉降计对填石路基整体沉降进行智能监控。结果表明,采用无核密度仪测定孔隙率的结果整体低于灌水法1%~6%,但数值更稳定、误差更小、检测效率更高,可采用修正后的数值控制路堤压实质量;路堤完工后最大沉降速率为0.47mm/d,工后约60d沉降速率变缓,约80d累计沉降量趋于稳定,路堤整体稳定。

Taking the embankment filling of the TJ09 section of Guangzhou to Lianzhou Expressway as an example,the paving method and compaction quality inspection and control during the construction of the rock-filled embankment are studied,and the compaction scheme of different layers of the rock-filled embankment is proposed.The irrigation method and the non-nuclear density meter are adopted to measure the porosity,and a single-point subsidence meter is embedded in the embankment to intelligently monitor the overall settlement of the rockfill roadbed.The results show that the porosity measured by the nonnuclear density meter is generally 1%~6%lower than that of the irrigation method,but the value is more stable,the error is smaller,and the detection efficiency is higher.The corrected value can be used to control the compaction quality of the embankment.The maximum settlement rate after completion is 0.47mm/d,the settlement rate slows down about 60d after construction,the accumulated settlement tends to be stable for about 80d,and the embankment is stable as a whole.