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1、,Conservation and Consideration of the Leaning Tower of Pisa,作者：J,SECTION,1.Location and Structure,2.Reason and Hazards,3.How to conserve the tower,4.Conservation and Summary,LOCATION&STRUCTURE,1.,A symbol of the city Piza，even of Italy,Circular columns,Arched door,The top of the towers interior,Top
2、 stair,Towers interior,The reason is tower continual interaction with the soil on which it was built.,2.Reason and Hazards,several layers of soils of different materials,various soft silt deposits and very soft clays,in the depth of about one meter is the groundwater layer.,This conclusion is based
3、on the observation of the soil composition of the soil obtained.,The Leaning Tower of Pisa is a precious cultural heritage of the world.Once the collapse of the Leaning Tower of Pisa,not only cause casualties,but also the country and the world will cause immeasurable losses,2.Reason and Hazards,How
4、to conserve the tower,3,CONTENTS,http:/,Engineers can not come up with the most effective solution to save the Leaning Tower.They can only take some temporary measures,such as using steel cable to fix the tower；setting 600 tons of lead on the bottom of the north，forming a huge force to fix the tower
5、 body.,However,it was too ugly for these pieces of lead to pile up beside the Leaning Tower,the people and artists offered a strong protest.,They started to hollo-wed out the soil of the north foundation of tower.Finally,they successfully conserved the tower.,4.Conservation and Summary,another terri
6、ble example:Canadas Kang Barn,Reasons for its collapse:Designing load goes beyond the groundworks shearing strength Failure of subgrade,but no obvious crevices on siloEffective measures:established more than 70 concrete piers to support the building under the foundation.388 jacks were used to plumb the leaning silo.,learn from experienceConsolidate subsoil at the early stage of construction.Dont overestimate the groundworks ability of bearing the weight.Dont cheating on workmanship and materials.Service the products at regular intervals after putting into use.,Thank you,
