交河故城病害特征及动力测试分析

Disease Characteristics and Dynamic Test Analysis of Jiaohe Ancient City

介绍了交河故城存在的风蚀、雨蚀、掏蚀、裂隙和崩塌等主要病害类型,总结其现有加固方式,并对典型遗址体进行地脉动测试,结果显示:①土遗址的自振频率主要在1.72~6.03 Hz,阻尼比主要在0.027~0.043,符合实际情况;②墙体相对于塔体墩台的自振频率较大,受地震作用影响较大,应对交河故城居民墙、佛寺墙等薄弱墙体进行重点监测与保护;③地脉动由底部传至顶部,其速度存在明显放大效应,放大倍数约为1.5~3倍。

This paper introduces the main types of diseases such as wind erosion,rain erosion,erosion,fissures and collapse in the Jiaohe Ancient City,summarizes its existing reinforcement methods,and conducts pulsation tests on typical sites.The results show that:①The natural frequency of the earth ruins is mainly between 1.72~6.03 Hz,and the damping ratio is mainly between 0.027~0.043,which is in line with the actual situation.②The natural frequency of the wall is larger than that of the pier of the tower,and it is greatly affected by the earthquake.Weak walls such as residential walls and Buddhist temple walls in Jiaohe Ancient City should be monitored and protected intensively.③The ground pulsation is transmitted from the bottom to the top,and its speed has obvious amplification effect,and the magnification is about 1.5~3 times.