Analysis and Practice of Demolition After Internal-support Technology in Foundation Pit Engineering
This paper briefly reviews the construction situation and existing problems of support replacement of the conventional internal support,discusses the advantages and disadvantages,and introduces the detailed cases of di-rectly constructing the superstructure without removing the internal support.By calculating the influence of the tra-ditional method and demolition method after internal-support on the support structure and compared with the mea-sured data,the feasibility of the demolition method after internal-support technology is demonstrated.The main conclusions include:It is feasible to carry out the construction of the superstructure firstly without removing the in-ternal support,and then backfill the foundation pit fertilizer tank after the waterproofing of the basement wall simul-taneously;The influence of the two methods on the displacement control of supporting piles is similar;The pile bending moment,supporting axial force and surrounding ground settlement generated by the demolition method after internal-support are all smaller than the traditional demolition method,which can save building materials,reduce project construction costs,reduce the impact on the surrounding environment,and is more favorable to the project construction;The demolition after internal support technology is safe and reliable,especially suitable for projects,whose construction period is tight and traditional method may have a greater impact on the surrounding environment.
foundation pit supportinternal supportdemolitionapplication
国家科技期刊平台
NSTL
万方数据
