通过对钱塘江河口坝头异型块体防冲事件的调查分析 ,结合利用室内模型试验的结果 ,得出了异型块体对现场丁坝坝头防护的成败原因。根据试验成果及理论分析 ,提出了改善坝头异型块体防冲效果的方法 Through the investigation and analysis of the anti-scouring events on the shaped block of the Qiantang River estuary, and combining with the results of the indoor model test, it is concluded that the shaped block has the success or failure of the dam head protection on site. According to the test results and theoretical analysis, the method of improving the anti-flushing effect of shaped concrete blocks is proposed