Structural Stability Analysis Of Losses Cave

With the spring up of Green and sustainable developmental, Cave has been concerned bypeople again. It possess super-performance of warm in winter ande coodl in summer, greenenvironmental-protective, pollution-free. Being spread and applied has great theoretical andpractical significance to resolve the recent energy crisis and environment problems.This paper chooses losses cave on the cliff as the study object. Based on theoreticalanalyses of cave building system, this paper summarizes its History evolution, RegionalDistribution and classification. Surveying cave dwelling in Shanbei, Shanxi thoughcombinational methods of questionnaire survey and on-site measurement. Through simulation,measurement and comparison of its existence，failure law, indoor thermal environmentbe carefully studied, three existing forms and four kinds of failure of cave has been proved.In order to make the research in-depth, this thesis takes the loess cave in Shanxi as anexample, creating three dimensional model by MIDAS/GTS through site and selection of soilparameter. According to excavation process, cave sizes, depth and lining as the project’sreference discuss stabUility onf cavRe throuegh dgisplaciemsentt fieeld anr d plastic zone. The resultsshown that in excavation process, digging into the kiln deep1/3,the increment ofdisplacement and maximum plastic strain can reach50%.The Dangerous point of verticaldisplacement appeared at the central baseboards and cave top.the maximum horizontaldisplacement appeared at both sides of cave,and plastic zone appeared at both straight walland side arch-foot. Thus infer that these positions were damaged earlier. Discussion on thegeometric size, discovery that with the increase of span-length and height, the displacementand plastic strain would be increased, and the span-length is the first facts. Landfill cover isalso an important elements to cave stability, and it is no more than8m in general conditions.And after doing lining on cave, the security can be significantly improved, so do lining shouldbe a necessary measure.To further explore the thermal environment quality of cave dwelling. This paper take the loess cave of Zijian village in Shanxi Province as an example to test and analysis its indoor thermalenvironment.It demonstrated the indoor temperature is between23.9and27.5degrees in thesummer that can satisfy the22to28degrees rules of indoor air quality standards, so thehuman body have a good thermal comfort. But the indoor relative humidity ranges from60form75percents, beyond the45to65percents of the standard’s rules,its too humid andhuman body feels cold, so to put forward the specific improvement measures to wipe outhumidity.To sum up: the cave building is not only safe and reliable structure, but also the lowenergy building of energy-saving and land-saving,it is worth to promote applications, thereare broad prospects for development.