Study on Spring back of Particleboard Mat after Prepressing;

Analysis of prepressing contact in aluminium alloy resistance spot welding;

Since many plywood enterprises are faced with the prepressing problem of plywood,a series of designedorthogonal plywood prepressing experiments with several main factors influencing plywood prepressing property were made;the experiment results were analyzed and the most important factor influencing plywood preressing was found.

Calculations of soft foundation treatment sedimentation by vacuum preloading method;

In combination with the preloading engineering of an expressway by vacuum preloading combined with loading preconsolication, this paper analyzes the consolidation mechanism of vacuum preloading, discusses the construction factors influencing the effect of vacuum preloading consolidation, and points out common troubles and removing methods.

Experimental analysis on effect of treatment of soft foundation with vacuum-accumulation loads combined with precompression technique;

The results showed that the second value of the honeycomb cardboard may not get the peak value as the first time does, and directly enters the yield stage, thus makes that its stiffness less and the cushion is better than unpreload.

The water-filled preload method can be used to come up to reinforce the foundation, reduce the settlement and lower the cost effectively.

The quantitative relationship of the forecast to differential settlement of annular wall foundation of controlled water tests to preload large oil tanks is reserched and expounded briefly.

This paper introduces a sort of screw feeder for pumping high concentrated viscose and dense materials, which can provide pressure and enough materials, also narrates the main principle and technology features especially.