Development of a High Accuracy Harmonious Control Method for Push-Up Jack System for Building Construction

These days in Japan there are a lot of demands for middle- or high-story buildings, ranging from 9 to 15 stories. When constructing these buildings, various kinds of improvements have been accomplished so far ; adoption of pre-cast concrete components, optimized combination of steel, concrete and other materials, development of all-weather construction methods in which top-story building structures are utilized as all-weather covers. As results of these technological accomplishments, construction costs have been minimized and construction periods shortened. The building construction methods of today, in which a story is stacked on the preceding lower stories and the working site moves upward story by story, have thus been improved so ideally that some breakthrough would be necessary to go further. We have made another challenge to go further; we have developed a new all weather construction technology, in which a building structure is constructed on the ground level, in which upper stories are pushed up by a newly developed jack system and a lower story is constructed under the raise upper stories repeatedly. Our new system, with which not only steel structure building but also reinforced concrete buildings of 9 to 15 stories can be constructed, required us to develop a very high accuracy harmonious control method for a plurality of large capacity jacks. The authors have carried out a series of simulations by CAE( Computer Aided Engineering) methods, designed a new control system, developed a control system and proved its effectiveness by a series of tests.