粗粒珊瑚礁回填料地基加固处理与工程性能分析

Ground reinforcement treatment and engineering characteristics of coarse grained coral reefs backfill

以苏丹新港集装箱码头后方堆场地基处理工程为背景,设立了珊瑚礁回填料地基加固试验区,通过现场压实度、CBR、回弹模量与载荷试验,对比了振动碾压、快速强夯(夯击能500 k J与1 000 k J)与普通强夯(夯击能3 000 k J)4种加固方式的加固效果,分析了不同加固方法加固后珊瑚礁回填料地基工程性能。试验结果表明,粗粒珊瑚礁回填料工程性能与碎石土相当,加固后的压实度、CBR、回弹模量与地基承载力特征值均有不同程度提高。

Based on the engineering background of foundation treatment works of Sudan Port container yard, we established a field trial area for verification of coral reefs backfill foundation treatment approaches. Through the in-situ compaction degree,CBR, resilient modulus and plate load tests, we compared the reinforcement effects of vibration rolling, rapid compaction（ compaction energy 500 k J and 1 000 k J） and general compaction（ compaction energy 3 000 k J）, and analyzed the engineering characteristics of coral reefs backfill after the different reinforcement methods. The results show that the engineering properties of reinforced coarse coral reef backfill are similar to gravel soils, and the characteristic values of reinforced compaction degree, CBR, resilient modulus and foundation bearing capacity have increased at different extents.