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    An investigation of the disease of the Hongqingsi Grottoes and an elementary research for the prevention

    Li Zhongxiang;The Henan Ancient Building Insitute;  
    The prevention of the collapse and denudation of grottoes is just like a treatment for illness.Only after the root cause and pathology of the disease are found out and given treatment for the symptom,grottoes can be protected effectively.On the basis of systematic survey and test for the Hongqingsi Grottoes,it was discovered that the deficiency of qualities of the rock and the action caused by damp,capillary water,meteoric water and the root of trees lead to the steadiness loss of the country rock and the denudation of the carvings of the grotto.Additionally,the earthquake disaster makes the grotto collapsed and destroyed.According to the disease mechanism of the grottoes,through environment regulation and the improvement of the rock mass state,it is possible to prevent the collapse and denudation of the grottoes,by engineering measures such as vegetation cleaning up,water cutting off,rock mass consoli-dating and sealing up with chemical materials.
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