Study On Application Of Outside-defense-and-inside-paste-method In Underground Waterproof Engineering

Underground engineering waterproof can be divided into two kinds of outside-defense-and-inside-paste-method and outside-defense-and-paste-method.Because in the basement wall on both sides of formwork forming a whole system with outside-defense-and-paste-method,so as to ensure the quality of concrete basement outerwall;Outside-defense-and-inside-paste-method in the side wall of the basement for the brick,the other side is a template,both sides can not form a whole and not conducive to guarantee the quality of concrete wall of base-ment.So long,the construction industry generally believe that the choice of under-ground engineering waterproof outside-defense-and-paste-method,when the outs-ide-defense-and-paste-method can not be used when using.Xi'an Dingsheng Residence International project,the East?the west and the south side of the pit has no outside-defense-and-paste-method construction oper-ation space,and the eastern side of the excavation of the local subsidence,cra-cks.In such a construction space that it has neither extreme engineering condi-tions of foundation pit collapse risk,as the outside-defense-and-inside-paste-met-hod of construction process,the masonry walls on the inside of the original soil nailing wall as brick basement wall,at the same time as the retaining wal-l of the protection wall and foundation soil wall waterproof layer,so as to suc-cessfully break through the construction difficulties.It is a perfect reflection of the construction technology of outside-defense-and-inside-paste-method.This article intends to explore the advantages and disadvantages of outside-defense-and-inside-paste-method and outside-defense-and-paste-method based on the engineering condition of Xi'an Dingsheng Residence International project,espe-cially in extreme conditions of narrow space engineering and foundation pit collapse signs,applicability and safety of application of outside-defense-and-inside-paste-method.In order to provide reference for similar projects and break the construction industry generally believe that the outside-defense-and-paste-method is superior to the traditional concept of internal outside-defense-and-inside-paste-method,and finally put forward a new improvement of the outside-defense-and-inside-paste-method for engineering use.