Research On The Reasonable Spacing Of Preloading Pile Foundation Underpinning Method

In recent years, with the rapid development of China’s economy, the constructionindustry has also flourish. It also brings a lot of quality problems, including the problem offoundation areas account for a large proportion. The foundation that had been reinforcedshows that preloading pile foundation underpinning method is an effective method forreinforcing the base when using reinforced concrete pile foundation underpinning preloadingmethod reinforcement, and some of the local upper part wall will appear new cracks, thusaffecting the underpinning technology to further the promotion and application preloadingpiles. This paper considers the mechanical properties of the upper structure of the wall, thestudy preloading method of pile foundation underpinning reasonable pile spacing hasimportant theoretical significance and application value.In this paper, the main factors in the study based on the existing foundationreinforcement theory and engineering practice, combined with the characteristics of the brickstructure. According to the characteristics of preloading pile foundation underpinning method,reinforcement mechanism and design elements,analysis that reinforcing effect of the impactresults including pre-press pile spacing and the impact of the maximum allowable settlementpile. Using ANSYS finite element analysis software, established a preload piles Spacing finiteelement model and analyzed the different pile spacing on the upper wall of the mechanicalproperties of the structure affected by the principles of upper brick structure is not cracking,derived maximum pile spacing different layers preloading piles, piles made reasonablepreload pile spacing is calculated and studied the pile settlement on the wall by the upperstructure influence performance, obtained the largest pile of pile spacing to allow maximumsettlement amount; Finally analyzed with engineering examples validate pile and pile spacingis calculated to allow a reasonable amount of maximum subsidence, indicating preload pilefoundation underpinning method is an effective method of foundation reinforcement.The research results for further research foundation reinforcement theory and technology, promotion and application of preload pile foundation underpinning method hassome reference value, but also for engineering design and construction reinforcement similarreference.