关键词: 生石灰, 膨胀特性, 试验研究, 地基处理

Abstract:

It is a very common way to use quicklime to treat soft ground; the calculation of volume expansion of quicklime is a key problem. To study the expansive behaviors of quicklime, the quicklime and the mixture of quicklime and cement are taken as the specimens. In the test these factors influencing quicklime expansion are considered which include grinding rate, mixture ratio and pressure and so on. The quicklime volume expansive pattern is obtained from these test results; the quicklime volume expansive coefficient and pressure always appear following relationship: ; the relationship is obtained for the first time. When this formula is used in the calculation of ground treatment, the expansive coefficient depends on the lateral pressure coefficient , the gravity density and depth , i.e. . This formula can be taken as a basis in the calculation of expansive quantity and provide more accurate design parameter for this type engineering.

Key words: quicklime, expansive behavior, experimental study, ground treatment