Study On Deformation Characteristic Of Concrete Arch Dam With MgO Admixture

One concrete arch dam with MgO admixture in GuangDong province was regarded as an example in this paper. The arch dam's deformation characteristic was studied. The main contents are as follows:1. The experimental data of autogenous volume deformation of concrete with MgO admixture (MgO concrete for short) was comprehensively analyzed, then the exponent model and hyperbola model for autogenous volume deformation of MgO concrete were discussed. At the same time, the autogenous volume deformation model of concrete that has 4.5% MgO content was developed.2. The simulated analysis theory of three dimension FEM was deeply studied. According to the characteristic of MgO concrete, a simulated analysis program that can analyze the thermal field and stress field in the mass concrete with MgO admixture was developed by the author together with others.3. With the consider of one MgO concrete arch dam in GuangDong province, its construct course was simulated and its thermal field, autogenous volume expansion field, strain field, stress field and displacement field were also analyzed. At the same time, the simulated analysis theory and accuracy and rationality of the program were validated in comparison with the prototype observation data.4. By comparing the concrete arch dam with MgO with the concrete arch dam without MgO, the feasibility of the fast construction technology of arch dam with MgO concrete was verified, which provided scientific evidence for the application in concrete arch dam with MgO admixture.