真空预压完成后，分层回填土至设计标高，进行2遍满夯及冲击碾压处理。 采

After the vacuum preloading is completed, backfill the soil layer by layer to the design elevation, and perform two full ramming and impact rolling treatments. Using 20t impact rolling, each layer of fill is controlled at 50cm, and each layer of impact rolling is 4 to 5 times.

After the vacuum pre-pressure is completed, the layered backfilling soil is layered to the design elevation, and 2 times the filling and impact crushing treatment is carried out. The use of 20t impact mill, each layer of soil filling control at 50cm, each layer impact crushing 4 to 5 times.

After the completion of vacuum preloading, backfill to the design elevation in layers, and conduct two full compaction and impact rolling. 20t impact roller shall be used, each layer of filling shall be controlled at 50cm, and each layer shall be impacted and rolled for 4-5 times.<br>