Meanwhile,the characteristic or the relationships for the strengthening effect,deformation orderliness,tamping-energy,tamp frequency,tamp influence depth and the horizontal influence distance via a novelty in.

By simulating the excavation course of foundation pits and starting with the change of stress field,the regularities of remanent strength and static earth pressure of viscous soil mass under excavated plane are analyzed so that the influence depth due to soil mass excavation unloading may be determined.

Based on the analysis of stress path characteristics,influence depth of reinforcement and mechanism of consolidation deformation,this paper reveals the characteristics of stress and deformation in the bridge-slope subgrade reinforced by vacuum well-point dewatering combined with equal preload.

By means of the stress state analyses on the rock mass surrounding openings , we studied the stress state of rockburst and the effective depth of rockburst .

A study of dynamic consolidation depth in engineering practice;

At last,the main influencing factors of consolidation depth and some problems need special attentions were analyzed.

In light of the problem of treating foundation by heavy tamping method,the author introduces its strengthening depth,discusses the matching of main tamping,full tamping and single tamping,and illustrates it by listing practical engineering,in order to perfect the design parameter of heavy tamping,main tamping and full tamping,and to achieve the target value of project.

In this paper, such dynamic compaction parameters as tamping frequency, hammer weight, hammer shape and reasonable falling distance were discussed, at the same time, a calculation method was introduced for estimating strengthening depth of tamping in combination with the specific feature of loess.