Theoretical Analysis and Testing of Ground Treatment Using an Expansive Method in Very Thick Collapsible Loess
HE Yong qiang and ZHU Yan peng
DOI:10.11835/j.issn.1674-4764.2009.01.010
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 44-48
- Abstract
Through technological research of foundation treatments in the collapsible loess areas, we recommend a method of treating foundations in collapsible loess with quicklime piles. We set forth the basic principle of this expansive method. When a very thick foundation in collapsible loess is treated, the computational formula for the volume of expanding material in a quicklime pile is deduced based on cavity expansion theory. This theory is applied to engineering practice. Physical and mechanical properties of the compacted soil are tested. The result shows that the collapsibility of a foundation in loess has been eliminated, its physico mechanical indexes have been improved, and the soil compressibility and the modulus of compressibility also increase remarkably, demonstrating the correctness of the computation theory. The feasibility of the expansive method for very thick collapsible loess areas is further established.