the representing intensity,by combining the quantitative analysis with the qualitative analysis.

Verification for base strength of distillation tower and improvement measures;

Checking the foundation strength by using the standard method;

It introduces the treatment principle and scheme,and does analysis calculation to the raft plate settlement and the spring rate of bottom soil,pile top settlement and the rigidity of pile body,foundation strength,which will supply reference to the similar projects.

Construction show reinforcement treatment can acquire stable foundation strength and good ground endurance.

The result suggests that 5th seismic active period of NE China will be over in about 2008,and that the maximal earthquake intensity is about magnitude 6 in this active period.

We use the set of 14 factors including seismicity and the precursors in the fixed points to establish the comprehensive evaluation matrix and the evaluation model of comprehensive prediction of seismic magnitude and apply them to earthquake prediction in Tianjin and its neighboring areas.

In this paper, a ten-year-standard seismic magnitude is estimated by using seismic risk analysis method, and the countermeasures of reducing seismic disaster are given according to the estimation result and the features of the Huoshan area.