The surface wave attenuation as the effect of vibratory compaction of building embankments

Abstract

There are two different sources of dynamic effects observed on buildings and structures - natural phenomena and human activities. Both may be related to the mining production or civil engineering construction. Ground vibrations induced by human activities characterize much lower intensity compared to the natural phenomena like earthquakes. However, due to the high urban development and sustainable development ideas, preventing the destructive effect of man-made vibrations belongs to the most important problems considering the structure and soil dynamics. Construction activities, road and railway traffic, and operation of machines, including crushing of spoil material (debris) from demolition works are the main categories in the classification of human activities which can generate ground vibrations. This paper takes a special interest in the first of the factors mentioned above. It is evident that the main construction or demolition activities causing dynamic problems in close proximity of structures are caused by pile or sheet pile driving and dynamic soil compaction by means of vibratory rollers or impulse compactors; as well as by demolition of structures, rock excavation and soil deep compaction by explosives. The vibration monitoring process needed to prevent structures from damage is described by various standards. They give particular criteria depending on various technologies and construction materials. The reduction of man-made ground vibrations is now the crucial scope of interest due to the need for sustainable technologies implementation. The negative environmental impact may be reduced at the source. Some new specialized methods are also proposed for minimizing the vibration transmission with the use of an active generator. The aim of the presented paper is to describe the modelling of dynamic vibratory soil compaction, using finite element method. The presented solution is addressed to short time vibration, generated by geotechnical works. This conclusion can be helpful by panning geotechnical works in the neighbourhood of vibration sensitive buildings/structures.

Theoretical Analysis of the Influence of Bearing Plate Position on the Bearing Performance of Soil around the CEP Antipull Force Double Pile

“…Thus, the bearing capacity of pile group foundations cannot be simply calculated as an integral multiple of single-pile foundations [14], and the position of the bearing plate is the main factor affecting the bearing capacity of CEP pile groups [15]. This study takes CEP double piles as the research object in an ideal condition, where the influence of the change of soil density during the penetration process of the pile [16,17] and the increase of the load during pile driving on the soil mass is neglected [18,19], sets the important parameter of the bearing plate position, and designs five types of model piles to be divided into six groups for finite element simulation of the same plate position and different plate positions. Compared with ABAQUS software (ABAQUS 2021 versions), ANSYS software (Ansys R19.0 versions) can achieve better simulation in static, quasi-static, and dynamic problems and linear analysis [20]; to this end, it is necessary to establish and address the following objectives and tasks through ANSYS software (Ansys R19.0 versions):…”

An Automotive Ferrofluidic Electromagnetic System for Energy Harvesting and Adaptive Damping

“…Mechanical vibrations are the transmission of oscillating physical energy in a solid material that rises during the operation of machines. In real-life applications, there are useful vibrations [ 1 ], where the vibrations are used to run processes, but most mechanical vibrations are harmful and destructive [ 2 ]. Vibrations should be repealed or damped to keep systems in a working condition or to achieve a higher comfort level [ 3 ].…”

A Comparative Study between Polyline and Straight Line Arrangements of Antislide Piles Based on Soil Arching Effect

“…With the rapid development of engineering construction, pile foundation has been widely used in housing construction, bridge wharf, and managing geological disasters. Recently, numerous investigations have been carried out on the design theory, construction technology, testing technology, and application of piles in diverse applications [4][5][6].…”