石粉垫层用于地基处理时的沉降规律分析

Settlement regularity and analysis of stone powder cushion used in foundation treatment

通过沉降观测资料,对多种地基处理方法及组合型式进行了对比。根据监测沉降量结果得到:石粉垫层用作垫层强夯施工时,厚度应达到基础宽度的0.25倍~0.50倍,此时可以明显的调整基岩起伏场地地基总体稳定性、降低基底附加压力。石粉垫层作岩石褥垫使用时,厚度小于0.5 m为宜,夯填度应据计算的沉降量控制,否则会适得其反。

The settlement observation data,comparison of various ground treatment methods and combinations. According to the monitoring settlement results： when the stone powder cushion is used as a cushion for strength construction,the thickness should reach 0. 25 ~ 0. 50 times the base width. At this time,the overall stability of the rock foundation in the bedrock undulation site can be significantly adjusted and the base pressure can be reduced. When the stone powder cushion is used as a rock mattress,the thickness is less than 0. 5 m. The amount of concrete should be controlled according to the calculated settlement,otherwise it will be counterproductive.