Preferring Bidding Program Of Deep Excavation Support Programs Based On Multilevel Grey Evaluation Method

Due to the mult ip le of accident and the sever ity of consequences, deep foundation pit engineering is becoming the focus of society rapidly. C urrent ly, deep excavation support programs tends to choose according to the qualitat ive indicators and expert experience in actua l project, or simp ly decided to so me partic ular factor such as low cost, low environmenta l impact, short duration and so on. However, deep excavation is a complicated systemat ic project, how to make the best choice wit h scient ific method is a pressing proble m in ma ny bidding program.Along with the deve lopment of analyt ic hier archy process(AHP) and fuzzy mathe mat ics and grey theory, different scholars intended to make a preferred bidder for excavation works program by us ing the gre y correlat ion model, hierarchy grey t heory. But in practica l engineering, the mathe mat ics decis io n methods appear to be too comp licated, that polic ymakers cannot co mprehend those sophist icated theoretica l and use them. Therefore this paper proposes mult ileve l grey e valuat ion method, a decis ion method which is easy to master and therefore, easy to use.This artic le mainly research among ma ny b ids that could satis fy t he requireme nt of structure scheme, how the owners do an integrated eva luat ion of the program of econo mic and technical s imply and rapidly. Through the literature research, this art icle find out the present s ituat ion o f deep foundatio n pit support scheme and deve lopment sit uat ion at home and abroad, and comb ined wit h the literature in the fie ld survey and questionna ire data of deep foundation pit support sche me establis h the eva luat ion index system, on the basis of t he mult ileve l grey eva luat ion model is established, through mult ileve l grey evaluatio n method, the author calculate the integrated value of different bids, and confir m the best one by sort ing. In the fina l of this paper,the applic ation of mult ileve l grey eva luat ion method to yinchuan xixia wanda plaza for deep foundation p it supporting e ngineering bidding pla n select ion, to verify t he simp licit y and operab ility of this method, provid ing an effic ient and practical method for the selection of future projects.