Using the displacement monitoring information,the soil body principle of balance,the support design principle of wall-protection pile instructs the difficult problem of the support and protections of deep hole excavated for building foundation is adapted to the enlargement of foundation depth.

In view of the work of under ground-cut tunnel beneath railway bridge the underpinning construction method of its pile foundations under dynamic loads is introduced as well as lifting transition technique and displacement monitoring method, which provide good references for pile foundation underpinning and bearing capacity transition under complex geological condition.

Safety monitoring model for extruding effect and group effect of precast piles;

Earth－rock dam seepage flow monitoring model base on neural nets;

And the incentive and monitoring model is built up to promote the alliance stability.

Based on these simulation results, a model-monitoring on-line fault detection method was proposed, which used the difference b.

The cable structure that is often used in the construction is numerically analyzed in this paper, at the same time, the displacement model has been established and the formulas of Finite Element Method (FEM) have been derived.