Stress state of the diaphragm of a tubular hydraulic structure on subsident soils

In article discusses the practice of irrigation development of subsiding land points to the often occurringcases of disruption of hydraulic structures. This is largely due to the lack of knowledge and neglect in the design of theinteraction features of the GTS and their subsiding bases.As a result of the conducted research, a number of regularities of joint work of network hydraulic structures andsubsiding bases were clarified, which allowed the development of practical design methods aimed at improving the reliability of hydraulic structures.On the basis of experimental data, the regularities of changes in the stress-deformative state of the “structure-wettedsubsiding base” system are specified; a table was compiled to determine the vertical normal stresses according to thedepth of the base depending on the load, which differ significantly from those calculated in accordance with the theoryof elasticity; Recommendations are given for calculating the effective value of soil subsidence depending on acombination of time-varying moisture stresses.According to the results of the study of the work of full-scale hydraulic structures, possible typical schemes of loadingtheir elements (flat tips) have been established. This allows you to make calculations for the most dangerous state, which allows the reliability of the results.