Application Test Of Embedded Steel Bars Technology

Through the pull out experiment of embedded steel bars, the influence to the strength of embedded steel bars from the depth of embedded steel bars, concrete strength and the level of steel bars, the damage form of embedded steel bars under different experiment condition were investigated. According to the result of the experiment analysis, the relation between depth of embedded steel bars and the strength of concrete, the relation between the depth of embedded steel bars and the diameter of steel bars; the depth relation about different diameter of steel bars be planted in the different strength of concrete, the primary and secondary relation in the application of embedded steel bars among the strength of concrete, the diameter of steel bars, depth of embedded steel bars have been got. In the experiment, firstly some groping experiment were taken, and through the data analysis of gropingly experiment the scheme of formal experiment was made. According to the theoretical analysis of gropingly experiment and formal experiment, the theoretical relations of the strength of concrete, the diameter of steel bar and the depth of embedded steel bars were made, and a recommendation of use the formula 5.1 to calculate the least depth of embedded steel bar after the failure of the steel bar and the failure of concrete when it under the action of pull strain was made. This offered the theoretical guidance about the application and the project design of embedded steel bars technology.The following conclusion has been obtained from the experiment of embedded steel bars technology:(1) Round steel bar is unsuitable in the application of embedded steel bars at the same situation.(2) Use formula 5.1 to calculate the depth of embedded steel bars is safety, reliable and it meet the needs of project application.(3) In order to get the strength of steel bar function fully, the embedded steel barshould be planted in suitable depth. This suitable depth should be ascertained by formula of theoretical calculate or by the experiment.(4) In order to undertake the premise of the strength of the steel bar, the diameter of the steel bar by its by-dimension that function as the dimension to bond with concrete should be selected.(5) In order to avoid leave the empty drum in the hole that influence the strength of embedded steel bars, the air in hole should be expelled fully during the course of plant the steel bar.(6) The embedded section of steel bar should have rust-cleaning function, dirt-cleaning function and fully straight.(7) To ensure the bonding strength of the embedded steel bars, the cleaning and drying of the hole should be guaranteed.