沉管灌注桩及打入式桩成桩前后场地类别的测试与分析

本文讨论了沉管灌注桩及打入式桩对场地类别的影响和减轻震害的机理，通过对淮阴工学院主楼地基在成桩前后的建筑场地的剪切波速对比测试，作者发现沉管灌注桩及打入式桩有改变地类别的可能，最后建议《规范》^1]应增加对采用桩基础的建筑（特别是打桩较密的高层建筑）在打桩后应再次进行剪切波速测试并对场地类别的重新判定等内容，从提供工程设计的经济效益和社会效益。

Measurement and analysis of site classification before and after driving vibro or other driven piles

This paper discusses the influence of vibro piles or other driven piles on site classification and the principle of weaken earthquake disasters by pile foundation. Comparing measurement and analysis of shear\|wave velocity in subsoil of Huaiyin institute of technology main\|building before and after driving piles,the author discovers the site classification may be changed by pile foundation. At last, the author suggests the CODE must supplement some content about the changes of site classification by pile foundation and measuring shear\|wave velocity again in the subsoil of the piling building after driving piles, particularly in the subsoil of the dense piling high\|building after piling. It can increase the economy benefit and society benefit.