[1]王常亚,石玉成,刘琨,等.青海省典型土遗址病害及动力测试分析[J].世界地震工程,2021,(02):232-240.
 WANG Changya,SHI Yucheng,LIU Kun,et al.Disease characteristics and the analysis of microseism observation of typical earthen ruins in Qinghai[J].,2021,(02):232-240.
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青海省典型土遗址病害及动力测试分析
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《世界地震工程》[ISSN:/CN:]

卷:
期数:
2021年02期
页码:
232-240
栏目:
出版日期:
2021-04-30

文章信息/Info

Title:
Disease characteristics and the analysis of microseism observation of typical earthen ruins in Qinghai
作者:
王常亚1 石玉成1 刘琨12 李桐林1 缐正英1
1. 中国地震局兰州地震研究所, 甘肃 兰州 730000;
2. 中国地震局黄土地震工程重点实验室, 甘肃 兰州 730000
Author(s):
WANG Changya1 SHI Yucheng1 LIU Kun12 LI Tonglin1 XIAN Zhengying1
1. Lanzhou Institute of Seismology,CEA, Lanzhou 730000, China;
2. Key Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China
关键词:
青海省土遗址病害特征脉动观测放大效应相互作用
Keywords:
the earthen ruinsdisease characteristicsmicroseism observationpercentage difference
分类号:
TU87
摘要:
通过调查青海省四处典型土遗址发现表面剥蚀、冲沟、裂缝、坍塌、人为破坏等病害普遍存在,门源古城和湟中县部分长城因缺乏保护,人为破坏情况严重,土遗址保存状况恶劣;大通县长城和湟中县加牙烽燧在开展保护工程后,土遗址整体保存状况良好。大通县长城2处墙体的现场脉动观测结果显示:(1)2处墙体的速度峰值随高度增加有明显放大现象,一号墙体由底部到顶部速度峰值放大1.7倍,二号墙体放大2.9倍,放大效应让2处墙体在地震时更不稳定;(2)两处墙体的测试频率在3.04 Hz至5.71 Hz之间,通过计算获得一、二号墙体差值百分比分别为30.5%和11.1%,表明二号墙体与场地相互作用明显,处于高风险影响,当遭遇地震的卓越频率与之相近时会发生明显的共振现象。因此应对观测处墙体进行加固,以减小与场地的相互作用,提高墙体的抗震稳定性。
Abstract:
Through investigation of four typical earthen ruins in Qinghai Province, it was found that surface erosion, gullies, cracks, collapses, man-made damage and other diseases were widespread. Among them, the ancient city of Menyuan and a part of the Great Wall in Huangzhong were poorly preserved due to lack of protection, and their stability was seriously threatened by human activities. The Great Wall of Datong County and the Jiaya Beacon Tower in Huangzhong County had many small-scale diseases, but after the protection project had been carried out, the overall preservation of the earthen ruins were in good condition.Field pulsation observation results of two walls at the Great Wall in Datong County showed that:①The peak velocity of the two walls was obviously enlarged with the increase in height, the peak velocity from the bottom to the top of the wall 1 was magnified 1.7 times, and the wall 2 was magnified 2.9 times, the amplification effect would make the wall more unstable in the earthquake.②The test frequency frequency of the two walls was between 3.04Hz and 5.71Hz; the test period of the two walls was similar to the site predominant period, and the percentage difference was 30.5% for wall 1 and 11.1% for wall 2, which indicated that the two walls were at high risk of impact and would resonate significantly in the earthquake.

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备注/Memo

备注/Memo:
收稿日期:2019-12-31;改回日期:2021-03-11。
基金项目:国家重点研发计划(2020YFC1522200);国家自然科学基金项目(51678545)资助
作者简介:王常亚(1992-),男,硕士研究生,主要从事岩土地震工程与工程地震研究.E-mail:879144166@qq.com
通讯作者:石玉成(1966-),男,研究员,博士,主要从事岩土地震工程与工程地震研究.E-mail:shiyc@gssb.gov.cn
更新日期/Last Update: 1900-01-01