“橡皮土”地层施工作业面施工处理技术

Treatment of “rubber soil” construction ground

摘要:

以中蓝置业住宅地块项目为例，通过对“橡皮土”地层成因机理分析，得出“橡皮土”性状的出现与土层的粘粒含量和含水率相关性较高的结论。分析认为处理“橡皮土”的措施，就是改变“橡皮土”的流塑性状，降低土层的含水率。改变土层流塑性的措施有置换土质、深层搅拌添加水泥、生石灰等，增强其固结性能，或者压入碎石、卵石等增加其稳固性。改变含水率的措施，有置换土质、挖渠抽水晾晒、抽水降水等。本项目选择搅拌置换和抽水降水的作业方式，都达到了消失“橡皮土”性状的目的，满足了其作为施工作业面的需求。

Abstract:

In regard to Zhonglan Real Estate Residential Land Project, analysis of the formation mechanism of “rubber soil” led to the conclusion that treatment of “rubber soil” is to change the flow-plastic properties of “rubber soil” and reduce the moisture content in the soil layer. The measures to change the flow plasticity of soil layer include replacing with different soil, adding cement and quicklime with deep mixing to enhance the consolidation performance, or pressing in gravel and pebble to increase the stability. The measures to change water content include replacement with different soil, digging and drain water to dry, dewatering with pumping. For this project, mixing replacement and dewatering with pumping has been performed to achieve the purpose of eliminating the “rubber soil” characteristics, which met the requirement for construction ground.