Model Test Of Integral Structure Of CSG

Gelled sand and gravel material is a new type of material,its mechanical performance is as follows: in the river bed gravel in the incorporation of cementitious materials,the mechanical properties with the amount of gelling material changes will be significantly changed,gelled sand and gravel The dam is widely studied because of the small amount of cement used to greatly reduce the cost of the project and reduce the advantages of hydration heat.However,as a new material dam,the structural safety of the dam is mainly due to the relatively few studies.In this paper,the stress and strain distribution of the dam body under the action of the dam body model and the failure mode of the dam under overload condition are mainly studied.Gypsum sand and gravel dam as a new type of dam,the use of materials gluing sand and gravel material mechanical properties between the soil and concrete,dam structure profile is also between the gravity dam and earth dam between its structure Stress analysis of the current situation at home and abroad are mostly theoretical analysis of the main,due to the lack of practical engineering,the internal stress of the dam can not be measured,the problem through the model test method of cemented gravel dam under load The stress distribution of the body is analyzed and the correctness of the test results is verified by the method of finite element analysis.In this paper,based on the analysis of a large number of hydraulic model test,combined with the "grit sand and gravel material mechanical properties,durability and dam type research",for gelled sand gravel dam dam stress analysis and failure of the experimental analysis,The stress distribution law of the dam under normal load is studied,and the failure mode of the dam is analyzed.The failure mechanism is used to provide reference for the safety evaluation of the dam.The main contents of this paper are as follows:The experimental study on the structural model test of gelled sand and gravel dams is mainly carried out,including the preparation of gelled sand and gravel dam model materials and the production process of the model by the previous material test.The hydraulic sandstone The test method of the dam mainly includes the loading method and the measurement method and the processing of the later experimental data.Through the model test method,the stress and displacement of the dam are obtained under the load,and the stress distribution of the actual engineering dam is obtained through the similarity relation.The correctness of the test results is verified by the finite element analysis.The structural failure modes and failure mechanism of gelled sand and gravel dams were obtained by experiments.The ultimate bearing capacity of the dam body and the overloading capacity of the dam are obtained,and the safety factor of the overburden overload(safety factor of the overloading overload,the safety factor of the non-linear deformation overload and the overload bearing capacity of the ultimate load capacity)are determined.Get the weak link of the dam.