An analysis of shear characteristics on the concrete–rock mass interface is presented, in order to simulate the effect of load at the contact of concrete structure of the dam and the rock foundation. ...The analysis is based on the real mechanism of shear, which is different from the so-called the “saw tooth” model that simulate the walls of joints in the rock mass. As a result, the analytic form of shear deformation and shear strength as a function of normal and shear loads, as well as the mechanical characteristics of the rock mass, is established. In this way, mathematical models are derived that can be used for structural analysis of Concrete Dams for the Preliminary Design level. The models are developed on the basis of a large number of shear tests carried out on the concrete blocks at the concrete dam sites, during the period from the seventies to the present day.
•Characteristics of shear at the contact of concrete–rock mass.•Analytical expressions for the shear modulus and strength as a function of normal and shear stress and deformation of bedrock.•New interpretation of the shear mechanism until failure at the concrete-rock mass contact.
•The original criterion of prestressing used in hydraulic concrete tunnel linings.•A new method of measuring water losses in the tunnel is presented.•The original mathematical model is used to ...control the impermeability.
Present paper presents the application of pressure grouting in hydraulic tunnels subjected to high internal pressure of water. Structural analysis of the pressure grouting used for pre-stressing of concrete lining is shown along with the methods used to control the pressure grouting effects. The paper also presents a new experimental method for measuring the loss of water along the complete tunnel under operating conditions and a mathematical model for the evaluation of tunnel impermeability and functionality. All presented test methods have been developed and all measurements were performed by the “Jaroslav Cerni” Institute for Development of Water Resources in Belgrade (Serbia). These methods are presented on the example of a hydraulic tunnel of the “Bajina Basta” pumped storage plant in Serbia, during the stages of its construction and operation.
The paper describes the results of making the mathematical and physical
models of the authors, by using analogous methods and materials. There is the
mathematical rock mass deformability model as a ...base for foundation
engineering a concrete arch dam and the physical rock slope model which was
tested by loading until failure and the results were compared with the
calculation procedure. In the first example the correlation is established
between the static and the analogous dynamic in situ investigations for
creating the mathematical rock mass deformability model. In the second
example there is application of the analogous materials for the discontinuity
shearing simulation on the physical slope model. The results of the
geotechnical in situ investigations and laboratory testing carried out in the
Institute for Development of Water Resources "Jaroslav Cerni" in Belgrade
were used for making the models.
U radu su dati rezultati izrade matematickih i fizickih modela autora,
dobijenih koriscenjem analognih metoda i materijala. Prikazan je matematicki
model deformabilnosti stenske mase kao podloge za fundiranje lucne betonske
brane i fizicki model stenske kosine na kome su izvrseni ogledi opterecivanja
do loma i rezultati uporedjeni sa racunskim postupkom. U prvom primeru
uspostavljena je korelaciona veza izmedju statickih i analognih dinamickih
ispitivanja in situ za dobijanje matematickog modela deformabilnosti stenske
mase. U drugom primeru pokazana je primena analognih materijala za simulaciju
smicanja po pukotinama na fizickom modelu kosine. Za izradu modela korisceni
su rezultati geotehnickih ispitivanja in situ i laboratorijskih ispitivanja
izvrsenih u Institutu za vodoprivredu "Jaroslav Cerni u Beogradu.
The paper describes the results of making the mathematical and physical models of the authors, by using analogous methods and materials. There is the mathematical rock mass deformability model as a ...base for foundation engineering a concrete arch dam and the physical rock slope model which was tested by loading until failure and the results were compared with the calculation procedure. In the first example the correlation is established between the static and the analogous dynamic in situ investigations for creating the mathematical rock mass deformability model. In the second example there is application of the analogous materials for the discontinuity shearing simulation on the physical slope model. The results of the geotechnical in situ investigations and laboratory testing carried out in the Institute for Development of Water Resources "Jaroslav Cerni" in Belgrade were used for making the models.
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