The impaction of physical indicators for the mixture(firming agent and soil) are analyzed,between the same firming agent and different incorporation ratio or the same incorporation and different firming agent,through the research of several common firming agents indoor test,one kind of new solidification material is provided for the in-depth stirring pile.

According to the different solidified agent application in the civil engineering,the relationship of stressstrain and the variation of unconfined compressive strength of the clay stabilized with solidified agent in different stabilizer mixing ratio and time are studied through the laboratory experiment in this paper.

The mechanical test to different soil was did with soil stabilizer in the paper and in the different mixing ratio and time discussed the varied regulation of the nature of compaction,infiltration,unconfined compressive strength and freeze-thaw resistance of solidified soil.

The relationship between the strength and the dry density of pile shaft,kind of mixed soil,cement ratio and curing time is demonstrated detailedly.

Different age and different cement ratio of cement soil are tested with ultrasonic instrument.

In order to obtain the mechanical properties of cemen ted soil,a series of cemented soil specimens with different cement ratios are co nducted through uniaxial compression tests and ultrasonic wave tests.