Search Results - "Soils and Foundations"

In this study, a unique approach is used to calculate the likelihood of the safety factor and permanent displacement of natural slopes under earthquake shaking. The proposed approach was constructed using probabilistic modeling of landslide instability based on the Bayesian Network technique. First,...

Full description

Significant sand ejecta repeatedly appeared during the 2018, 2020, and 2021 flooding events at the Gounokawa River levee in the Shimonohara district of Shimane Prefecture, Japan. Detailed site investigations were conducted, including the recording of a local resident’s eyewitness account, soil borin...

Full description

The in–situ recycling technique offers a promising solution for the efficient management of the escalating volumes of waste muck or slurry generated during shield tunneling. While foam is extensively utilized for soil conditioning in earth pressure balance (EPB) tunneling, the effects of organic and...

Full description

Sporosarcina newyorkensis is an indigenous microbe found in sedimentary layers bearing methane hydrates in the oceans around Japan’s main islands. It can survive extremely cold temperatures and precipitate calcium carbonate (CaCO3). This has led to interest in applying the microbe in microbiological...

Full description

Suffusion is the detachment and migration of fine particles through voids connected by the matrices of coarse particles. Although water storage structures are known to be affected by fluctuations in seepage flow, due to fluctuations in the water storage levels brought about by rainfall and agricultu...

Full description

The Continuous Flight Auger (CFA) piles, also known as Auger Cast In Place piles (ACIP), have a widespread use in the world market of replacement concrete piles. The installation of such piles is generally made by equipment which records several significant installation parameters, as the torque Mt...

Full description

When shield tunnels traverse the upper-soft and lower-hard stratum, the pronounced geological differences lead to uneven stress distribution on the segmental lining, thereby intensifying both construction challenges and safety risks. Investigating the loading conditions and mechanical characteristic...

Full description

The article describes the results of laboratory tests of reinforced concrete pile sections instrumented with several measurement systems. Compression tests were carried out on three 300-mm-by-1.2-m cylindrical pile elements, reinforced with an IPE140 steel profiles. The elements were equipped with v...

Full description

Prediction of the earthquake-induced permanent displacements of retaining structures is a key step in the context of a performance-based design approach. For retaining walls with shallow foundations, this issue is usually dealt with using the well-known Newmark sliding block method. However, several...

Full description

With increased demand for urban space, there is a growing propensity to move urban lifeline systems such as Metro systems and utilities to shallow, cut-and-cover tunnels. The seismic behaviour of such rectangular tunnels is important as these systems need to remain operational in the period after th...

Full description

The pile construction process may disturb the soil adjacent to the pile shaft that significantly influences the torsional dynamic response of the floating pile. To consider this problem, the disturbed soil is divided into series of annular zones and a varying-parameter dimensionless function represe...

Full description

This study investigated the serviceability performance of piled raft foundations (or combined pile-raft foundations, CPRF) in various soils using three-dimensional (3D) finite element analysis. The piled raft foundation was assumed to be embedded respectively in homogeneous clayey soils and sandy so...

Full description

The Sand Compaction Pile (SCP) method is a widely utilized ground improvement technology that enhances the density of the ground by constructing sand piles through penetration and repeated withdrawal/re-driving of a casing pipe. This method is the most widely used liquefaction countermeasure method...

Full description

Unprecedented liquefaction-induced slope failure occurred during the 2018 Indonesian Sulawesi earthquake in which more than 2000 people were killed by sliding debris flows in very gentle slopes with a 2 % gradient. In order to clarify the mysterious mechanism of how long-distance debris flows could...

Full description

Natural slopes, which occur without human intervention, are susceptible to failure triggered by events such as earthquakes and heavy rainfall. The characteristics of these failures, including the shape of the slip surface and the magnitude of collapse, vary significantly due to factors like the dire...

Full description

Experimental results are presented in this technical paper to investigate the mechanisms of plane strain consolidation and drained shearing typical of below slope conditions. Five torsional shear hollow cylinder tests were conducted on a sandy silt gold tailings, where consolidation was performed un...

Full description

Understanding the gas seepage characteristics within fractured rock masses is of great significance for the prediction and prevention of hazardous gases in underground engineering. The formation is actually under a triaxial non-uniform stress state as a result of geological tectonic forces. Few stud...

Full description

Generally, soil properties are measured only at limited locations. To rationally estimate the spatial distribution of soil properties, it is preferable to effectively use all available measurement data, including indirect data. We propose a Gaussian process regression with multiple random fields tha...

Full description

Suffusion in well-graded sands is a significant concern in geotechnical engineering, potentially leading to malfunctions or failures in soil slopes, earth dams, and their foundations. In this paper, two internally unstable well-graded sands of various densities are subjected to seepage tests and con...

Full description

Steel slag, a by-product of steel making, is increasingly used in geotechnical construction due to its reactivity with silica and alumina in clays. Volcanic and diatom silica have various effects on the strength development of steel slag. As the effects of amorphous silica and the diatom density on...

Full description