Study On Excavation And Retaining And Protecting Designing And Enineering Decision-Making Of Alluvium

Excavation and retaining and protecting are basic construction techniques. Many mining engineering subjects are established on geologic condition of alluvium. So it would be more valuable in engineering and application to foreground that the developing study on designing of excavation retaining and protecting and engineering decision-making in geologic condition of alluvium for advancing theory and technology in this area, also the common law of exploring and study method of current engineering decision-making, grappling the content, preachment and actions of engineering decision-making, instructing engineering construction in mining engineering area.Taking the deep foundation excavations engineering of Jinan city as background, establishment in geologic and hydrogeology conditions of alluvium in Jinan city, the subject which is being designed in excavation and retaining and protecting of deep foundation excavations engineering and engineering decision-making had been studied quite thoroughly, in this dissertation, the designing system and decision-making mechanism of deep foundation excavations engineering that suitable to geologic condition of alluvium in Jinan city had been principally set up, it has quite important significant in the improvement of technology and management, to avoid safe accident, and at the same time ,the studying content and method in the dissertation would have some guiding and consult value to designing of excavation retaining and protecting and engineering decision-making of similitude mining engineering. In this dissertation pilot study achievements offered include:(1) Designing thoughts of deep foundation excavation engineering which is suitable to Jinan city geologic conditions had been perfectedConstruction and development law of Jinan city deep foundation excavations engineering had been summarized; Destroy patterns and the calculating methods of foundation excavations structural stabilization analysis had been illustrated; Four kinds of Jinan city deep foundation excavations engineering precipitation had been concluded; Precipitation designing method of deep foundation excavations engineering has been modified; It illuminated that there is no basely influence on Jinan city deep foundation excavations engineering precipitation to fountain; Transfiguration mechanism and calculating methods of Jinan city deep foundation excavations engineering had been expatiated.(2) Calculating pattern and method of compound soil nailing foundation excavations structure was brought forward.Designing calculating formula of micro-steel pile was realized, the contribution to the integer stabilization of basic structure which formed compound soil nailing wall had been completely taking into account, a new designing calculating method of compound soil nailing foundation excavations structure was brought forward.(3) The best decision-making method of Jinan city deep foundation excavations engineering designing scheme was formedDeep foundation excavations engineering scheme evaluation criterion were summarized, multi-attribute indexes that suitable to designing scheme of Jinan city deep foundation excavations engineering had been abstracted, hierarchy frame model of evaluating scheme had been set up, the best decision-making method of Jinan city deep foundation excavations engineering designing scheme was formed, and the softness of Jinan city deep foundation excavations engineering decision-making system had been exploited.(4) Rationalization proposal and actualizing management method had been taken forward for decision-making of Jinan city deep foundation excavations engineering.