龙门石窟擂鼓台南洞抢险支撑保护研究

A Study on the Emergency Support System for the South Cave of Leigutai in the Longmen Grottoes

龙门石窟擂鼓台南洞顶部、左壁为后期采用青砖补砌,受自然风化、降雨及人为干扰等影响,砖石砌体顶部南侧有多处凸起,并伴有裂隙张开加速现象,存在严重的稳定性问题,需要采取紧急性支撑保护措施进行抢险处理.在对龙门石窟擂鼓台南洞区域进行勘察研究基础上,确定该洞窟病害主要原因为水害及水害诱发的砌筑物破坏.针对洞窟存在的风险及风险发展情况,采用抢险支撑的方法对洞窟进行保护,同时布设了监测系统,现场试验研究及监测效果表明该支撑措施保护效果良好.

The arched roof and left wall of the south cave of Leigutai in the Longmen Grottoes were rebuilt with grey bricks sometime following their original construction.However,after prolonged natural weathering,rainfall infiltration and human interference,many protrusions have appeared on the south side of top of the masonry,accompanied by cracks that are spreading at an alarming rate and causing serious stability issues.Emergency support and protection measures are now necessary to protect the integrity of the cave.Based on field investigation of the site,it was been confirmed that water damage and subsequent destruction of masonry were the two primary sources of deterioration.In light of both the imminent and potential risks,emergency support structures were constructed in order to preserve the cave,and a monitoring system was established to observe the effectiveness of the emergency support measures.Both field tests and monitoring results show that emergency bolstering has been effective.