【摘要】 龙游石窟1号洞和其他4个洞体,开发16a来,在取得了丰硕的社会经济效益和学术成果的同时,洞体在自然力的作用下,出现了严重的破坏。构成石窟的柱、墙和顶板陆续出现裂缝。其原因是构成洞体的泥质砂岩易于风化、易于流变,在干湿交替和温度变化的情况下极易破坏。同时处于浅埋状态的洞室顶板、柱子、墙体强度不足,在自重作用下发生以冲切、剪切、弯曲为主要特征的破坏形式。开发时施加的外部荷载加剧了这种破坏。针对这些破坏形式,加固方案宜采用整体设计分步实施的方案。先柱墙,后顶板。柱墙加固以柱支撑为主要手段,顶板以梁支撑为主要手段。两者相互联系形成一个美观的加固体系。更多还原

【Abstract】 The No.1 cave and other four caves of Longyou Grottoes have been used for tourism and research over sixteen years.Within these years,plentiful and substantial socioeconomic performance and academic achievement have been obtained.But,these caves have been damaged to some extent by action of natural powers.Pillars,walls and roofs of the grotto have been cracked,because argillaceous sandstone forming the caves are prone to weathering and flowing deformation,and destruction by reasons of alternation of wetting and drying and temperature fluctuation.Roofs,pillars and walls of the caves were failed in the mode of punching shear,shearing and bending under action of weight because of insufficient strength,and external force in the process of exploitation aggravated the destruction.Layout of reinforcement should adopt integrated design and be carried into execution step by step for these failure modes.Pillars and walls should be reinforced firstly,and then roof of caves.Pillars and walls should be reinforced by pillars mostly and the roofs should be reinforced by beams.Both reinforcement instruments should be connected and form an artistic reinforcement system.更多还原