Abstract Direct shear box tests have revealed that the stiffness and strength of an ice‐filled joint are a function both normal stress temperature. Comparison these data with results similar experiments conducted on unfrozen joints indicates at low temperatures stresses can be significantly higher than joint. However, in absence sufficient closure pressure, less This implies if stability slope is maintained by joints, its factor safety will reduce temperature rise. hypothesis suggests...

Landslides (LS) represent geomorphological processes that can induce changes over time in the physical, hydrogeological, and mechanical properties of involved materials. For geohazard assessment, variations these might be detected by a wide range non-intrusive techniques, which sometimes confusing due to their significant variation accuracy, suitability, coverage area, logistics, timescale, cost, integration potential; this paper reviews common geophysical methods (GM) categorized as Emitted...

This study explores the potential impact of natural soil on concrete crack self-healing in sub-surface structures. Three types pre-cracked cement mortar samples were prepared for laboratory experiments, with some inoculated bacterial healing agents, others supplemented nutrients to attract indigenous bacteria, and plain served as controls. The placed within saturated under two conditions: slightly organic sterilised soil. After 100 days, closure was evaluated through microscopic inspection,...

The use of geophysical characterization karst systems can provide an economical and non-invasive alternative for extracting information about cavities, sinkholes, pathways water infiltration as well the degree karstification underlying carbonate rocks. In present study, three techniques, namely, Ground Penetrating Radar (GPR), Electrical Resistivity Tomography (ERT) Very Low Frequency Electromagnetic (VLFEM) methods were applied at different locations in relation to fluvial karst, which is...

Abstract The efficiency of bio self-healing pre-cracked mortar specimens incubated in sand was investigated. investigation examined the effect soil pH representing industrially recognised classes exposure, ranging from no risk chemical attack (neutral ≈ 7) to very high (pH 4.5). Simultaneously, subjected fully and partially saturated cycles for 120 days resemble groundwater-level fluctuation. Bacillus subtilis with nutrients were impregnated into perlite utilised as a bacterial healing...

In research on self-healing concrete, the restorative performance can be evaluated by a wide range of techniques. However, most these techniques challenging to apply concrete samples embedded in soil without causing significant disturbance test (as they require removing from soil, washing off any residue, and examining returning them). To provide solution this issue, we investigated potential application an in-situ, non-destructive method utilising electrical resistivity (embedded...

Abstract To assess the safety against failure of rock slopes in cold regions, such as high mountain areas, where stability is potentially maintained by ice discontinuities, shear strength ice-filled joints was investigated a series direct shear-box tests. permit control and repeatability, experiments were conducted using simulated specimens. These cast laboratory high-strength concrete. Laboratory measurements showed that at constant rate shearing, interface between joint surface repeatable...

The provision of suitable incubation environments is vital for successful implementation bio self-healing concrete (bio-concrete). We investigated the effect soil to examine if process can be activated in comparison with conventional environment (water). data was collected from laboratory-scale experiments conducted on mortar specimens. impregnated Bacillus subtilis and this bacteria encapsulated calcium alginate protection production process. specimens were mechanically cracked then...

Geophysical methods have a varying degree of potential for detailed characterization landslides and their dynamics. In this study, the application four well-established seismic-based geophysical techniques, namely Ambient Noise Interferometry (ANI), Horizontal to Vertical Spectral Ratio (HVSR), Multi-Channel Analysis Surface Waves (MASW) Nanoseismic Monitoring (NM), were considered examine suitability landslide monitoring effect seasonal variation on slope mass. Furthermore, other such as...

The use of bacteria-based self-healing concrete for substructures in ground conditions is an area increasing interest enhancing the durability and longevity infrastructure. In line with this objective, present study investigates bio-self-healing performance a cementitious material embedded clay soil varying chemical exposures water saturation regimes. Laboratory experiments were conducted on pre-cracked mortar specimens Bacillus subtilis encapsulated perlite. incubated different pH sulphate...

Landslides can substantially impact the fluvial systems, which is why continuous mapping of their extent, evolution and stability assessment crucial. However, in such environments, material identification (e.g. colluvium) subsurface characterization by methods used for geologic geotechnical investigation often a challenging task. Thus, these classical invasive may benefit from geophysical techniques to enable enhance our understanding areas. To examine integrated approach, Multi-Channel...

Reliable characterization of the karst system is essential for risk assessment where many associated hazards (e.g., cover-collapse dolines and groundwater pollution) can affect natural built environments, threatening public safety. The use multiple geophysical approaches may offer an improved way to investigate such sinkholes aid in geohazard assessments. In this paper, covered karst, which has two types shallow caves (vadose fluvial) located Tarimba (Goias, Brazil), was investigated using...

A study was undertaken to evaluate the embodied greenhouse gas emissions of four different design options for foundation a residential modular building in East Midlands, UK. The assessment considered carbon dioxide equivalent material production (without and with Portland cement replacement using ground granulated blast-furnace slag), transportation, construction works (such as soil excavation) plant usage on site off site. findings indicated that helical piles reinforced concrete slabs...

Earth and Space Science Open Archive This is a preprint has not been peer reviewed. ESSOAr venue for early communication or feedback before review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go to new versionThe potential use of geophysical methods identify cavities, sinkholes pathways water infiltration: case study from Mambaí, BrazilAuthors Yawar Hussain iD Rogério Uagoda Welitom Borges José Gustavo da Silva Nunes Omar Hamza...

The application of geophysical monitoring technologies may offer an opportunity to understand the dynamic slopes in response factors triggering their instability. In this study, Ambient Noise Interferometry was used as a approach on man-made reduced-scale vertical slope and natural-scale landslide Sobradinho (Brazil), under influence mechanical stress rainfall, respectively. For both experiments, we adopted similar data acquisition system processing workflow. After preprocessing ambient...

Rainfall-induced landslides pose a significant risk to communities and infrastructures. To improve the prediction of such events, it is imperative adequately investigate rainfall-dependent dynamics (leading fluidization) any associated internal sliding along shear planes within clayey slopes. Therefore, present study adopted ambient noise analysis based on Horizontal Vertical Spectral Ratio (HVSR) method, measure seasonal variation Rayleigh wave ellipticity as an indicator for deformation...

Structures built on shallow foundations in expansive clay, where vegetation and weather conditions can significantly reduce the moisture content, must overcome risk associated with excessive desiccation conditions, such as shrinkage settlement. For many existing structures, removal of trees may not necessarily be an effective solution, it cause swelling heave long term. This study explores a system that could operated during prolonged drought periods to rehydrate neutralise negative pore...

Reactivation of a landslide is usually accompanied by microseismic signals emitted from the deforming soil mass. The reproduction similar in physical model test conducted under control conditions can allow researchers to explore and such complicated improve prediction full-scale failure. present study investigates similarity between slidequakes (microseismicity) naturally an existing colluvial (Sobradinho, Brazil) response rainfalls emissions generated pullout expander body (EB) pile...

The present study applies a geophysical approach to the Federal district of Brazil, challenging hydrogeologic setting that requires improved investigation enhance groundwater prospecting meet rising water demand. characterization complex hard-rock aquifer sub-system was conducted using direct current (DC) electrical resistivity tomography (ERT) integrated with surface geological information. With total twenty-seven ERT profiles, acquisition carried out dipole-dipole array electrodes an...