Construction Of Screens With Hydraulic Dampers In Soil To Protect Buildings And Structures Against Dynamic Loads

Abstract

It is well known that foundation constructions of buildings and structures operated in the urban environment are subjected to dynamic loads spreading in the soil that can lead to their unacceptable deformations. The effect of such impacts is complicated in areas with layers of weak water-saturated soils, as well as under conditions of dense urban development, where there are many underground utilities. To solve this problem, it is proposed to install a special screen in the soil along the protected structure, consisting of series-connected box elements of 12 m long, the internal cavities of which are separated by a solid wall with throttle elements filled with viscous liquid. The outer wall of each box on the part of the dynamic pulse propagating in the soil is equipped with a flexible membrane, which, when deformed, provides a flow of viscous liquid through the throttle elements between the cavities of the element, i.e., the seismic pulse is quenched due to the hydraulic resistance of the liquid. The technology making it possible to build such protection systems without the loss of tightness of the internal cavity of their elements with minimal impacts on the surrounding development, which is achieved due to vibrating immersion of elements in the soil pre-loosened by the screw, is developed. The proposed design and technological solutions will help to ensure the reliability of the protection system under repeated effects, as well as to minimize the technological settlements of the foundation for the period of vibration immersion of elements with hydraulic dampers.