Influences On Grotto Cultural Relies Caused By Engineering Construction Of The Porteetion project Of MoGao Grottoes In DunHuang
To protect the cultural relics of Mogao Grottoes in Dunhuang,and to eliminate unsafe hidden dangers,cliff strengthening,remedying and reconstructing the plank road alongside cliffs and integrated prevention and cure against sandstorms are projected.In these constructions,the effect caused by anchor eye drilling vibration during the process of cliff strengthening is difficult to avoid.In order to understand the propagation of the construction vibration of this kind and its effect extent on the grotto cultural relics,grotto rock masses dynamics parameters testing and anchor eye drilling vibration testing were performed in Mogao Grottoes.The test results show that the sympathetic vibration frequency of the cliffs of Mogao Grottoes is between 75 and 90 Hz,whenas the mechanical vibration frequency of horizontal drill adopted in China at present is within 6～7Hz,so it is easy to come to a conclusion that the anchor eye drilling construction will not cause sympathetic vibration damage to the cliffs and grottoes.Besides,the test results also show that most of the vibration peak values tested at a distance of 1m,2m or 3m from the anchor eye are above the protection standard which is 0.1mm/s,and the highest vibration speed of high-pressure drill impact reaches up to 6.01mm/s.It is clear that anchor eye drilling vibration may have harmful effect on the grotto relics,so this kind of vibration should be paid enough attention to.Only by 0.8～0.9MPa depression and 0.4m/min low-speed drilling,can the harmful effect caused by anchor eye drilling be reduced and the damage to grotto relics be avoided.
construction vibration anchor eye drilling mechanical vibration Grotto cultural relics Mogao Grottoes Dunhuang
ZHANG Mingquan WEN Lingli WANG Xudong GUO Qinglin SHI Yucheng
College of Resources and Environment,Lanzhou University,Lanzhou 730000,China Dunhuang Academy,Dunhuang 736200,China Lanzhou Institute of Seismology China Earthquake Administration,Lanzhou 730000,China
国际会议
甘肃敦煌
英文
86-92
2008-09-22（万方平台首次上网日期，不代表论文的发表时间）