From the perspective of social economic growth and government s public responsibility,the paper researches the seismic design standards set in China and Japan and other countries by different points of view,analyses the current seismic code deficiencies and causes,and proposes the revised proposal to further regulate the construction seismic code.

Taking the Xuchang-Bozhou Highway and Arongqi-Shenzhen Highway in Henan Province as an example, the present paper analyses the difference of silty sand foundation bearing ability evaluation between "construction foundation standard" and "highway bridge and culvert standard", giving each suitable range,pointing out the main evaluation methods of silty sand foundation bearing ability.

Taking the Xuchang-Bozhou Highway of Henan Province as an example,the difference of silty sand foundation bearing ability evaluation between "construction foundation standard" and "highway bridge and culvert standard" is analysed.

These caused building codes were shifting from prescriptive code to performance-based code.

The analysis is based on two methods: one is LISHEN, a finite-element method software, the other is stability formula in the constructional standards.

According to the mechanics theory and constructional standards, The half structure calculation model of a gutter-connected greenhouse under wind loading and .