某 5层混合结构办公楼北边靠干渠 ,地基含水量很大 ,饱和粉土厚度2 m ,其下为碎石土 ,开挖不足 0 .5 m,粉土顶面用脚即可踩出水来 ,其承载力不足 80 k N / m2 ,我们采用机砖挤密地基处理的方法。(1)机砖挤密桩的截面尺寸为2 40 m m× 2 40 m m,长度为 2 m,至碎石土层。(2 )第 1 A five-story mixed-structure office building is located on the north side of the main canal and has a large amount of water on the foundation. The saturated silt thickness is 2 m. Under it is gravelly soil, and the excavation is less than 0.5 m. The top of the silt can be stepped on with the feet. With a bearing capacity of less than 80 kN/m2, we use a method of processing compacted bricks. (1) The cross-sectional dimensions of the compacted piles for machine bricks are 2 40 m m × 2 40 m m and the length is 2 m to the gravel soil layer. (2) First