通过工程实例,介绍了在较厚回填土中采用强夯+CFG桩复合地基进行地基处理以提高地基承载力及控制沉降的设计及施工方法。强夯后对表层土进行标准贯入试验及静力载荷试验,打入CFG桩后对复合地基承载力进行单桩复合地基静载荷试验与单桩竖向抗压静载荷试验检测,结果表明地基承载力与变形均满足规范要求。工程实例表明采用此方法可节约造价、缩短工期且安全可靠。 Through engineering examples, the design and construction methods of foundation treatment using thick rammed + CFG composite foundation in thicker backfill soil are introduced to improve the bearing capacity of foundation and control settlement. After the compaction, the standard penetration test and the static load test of the topsoil were carried out. After the CFG pile was driven in, the static load test of single pile composite foundation and the static load test of vertical compression of single pile were carried out. The results show that foundation Bearing capacity and deformation meet the requirements of the specification. The engineering examples show that this method can save costs, shorten the construction period and be safe and reliable.