On practice of enlarged compaction pile by tamping;

By adopting pile soil interaction of analogue compaction pile of round hole expansion theory,this article analyses the stress and strain of pile soil,builds calculated formula of dry density of pile soil,and proves the accuracy and practicability of calculate method through case study.

Combined with the construction practice,the paper introduced the principle,performance and design method of the liquefaction of vibrating sand compaction pile.

Data of drawing velocity that is automatically measured by precise extrusion were analyzed.

The precise extrusion and the related machinery were reviewed.

It was introduced that how programmable logic controller(PLC)and functional modules in control systems for precise extrusion equipment were applied to realize the control for precise extrusion.

3D elasto-plastic FEM simulation of precise extrusion process of the box-shaped work piece;

The effects of second heat-setting on the performance of Nylon precision extrusion profiles;

Based on analysis of influences of technological and equipment factors on the instabilities of extrusion and precision of the extrudate,the investigation on axial fluctuation and transverse fluctuation of the precision extrusion was carried out.

The technological and mechanical factors affecting the precision extrusion of polymer were reviewed with 18 references.

Application of compaction pile in soil reinforcement of abutment backfill;

Monitoring analysis on soft base lime-soil compaction pile of one arch culvert in Dayun Highway;