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Among the important parameters determining the likelihood of occurrence of significant damage to engineering structures during an earthquake are the dynamic and seismic characteristics of the structures such as natural frequency, damping coefficient, and vulnerability index of the structure. In this article, the Nakamura method is applied to investigate the seismic stability of an earth-filled dam wall and the surface layer using microtremors. Measurements were taken at seven points on the dam crest and three poin...

In this paper, the main maritime exploration techniques have been analyzed, the seismic refraction, and the seismic reflection. Pursuant to the performed research, we considered the seismic reflection to be of interest, for which we shall suggest improvement in how the data is collected by proposing a hydrophone design. At present, the continuation of exploitation of the traditional basins of natural resources (gas, oil), as well as the emergence of new reserves, such as those in the Black Sea, make it compulsory ...

The study of the effect of blasting on bench stability is indispensable for the overall mine-s safety, in this perspective, we conducted a study in the limestone quarry, which is characterized by a highly fractured rock mass. While the quarry presents a steep topographic profile, the extraction is carried out on a single operating edge. The blasting operations in the quarry offer an unsatisfying fragmentation (high percentage of oversized boulders), important overbreak, and deformation to the bench-s face; these i...

The stability analysis of underground excavations is a crucial part of the design of underground excavations. One of the most common collapse hazards derives from rock mass cracking which creates potential wedge blocks falling or sliding into the tunnel. Many researchers have addressed this subject and are trying to resolve this critical issue for the safety of underground tunnels. The most extensive research involves implementing finite or discrete element numerical algorithms to analyze wedges. However, this ana...

In the case of road routes in natural and urban environments, a problem arises with a weak foundation at the boundaries of the easement of the facilities. The weak foundation is in the form of landslides, unstable varieties and ravines on which an embankment is built. In an urban environment, the weak base usually covers a much wider area than the easement of the roadways and streets to be strengthened. In order to avoid stabilization of the entire affected city infrastructure and to limit the strengthening activi...

One of the main sources of risk on slopes in the road infrastructure is the lack of sufficient technical awareness and creative competence of the specialists involved in the investment process. The impact of these sources can be minimized by implementing an appropriate risk management, prevention and protection system in slope stabilization. This system should ensure continuity of geotechnical judgment during geological survey, analysis, design and construction. Geotechnical risk should be considered as a product ...

The problem is actual when slope stabilizations are implemented, when the strengthening systems and re-slopes cannot secure road traffic. There are three main reasons for the problem: climate changes, insufficient funds for strengthened infrastructure and implementation by companies without experience in geotechnical construction. A half-tunnel is used in the presence of a retaining wall, which needs to be integrated into the structure of the new facility. For environmental reasons and traffic safety requirements,...

The method of fundamental solutions is a meshless method that belongs to the Trefftz class of numerical methods. The method needs only the boundary to be defined using the set of boundary collocation nodes; it is mathematically effortless to program. One of the imperfections in the context of MFS is the fictitious boundary without any rigorous definition. The other fact that MFS suffers from is the nature of the characteristic matrix that is non-symmetric and fully populated. This issue is overcome by adopting the...