How appear bearing capacity of stone column?4 answersThe bearing capacity of a stone column is influenced by various factors such as the vertical load, the interaction between the column and the surrounding soil, and the presence of any additional reinforcement or soil-cement bed. The behavior of stone columns under load can lead to bulging failure, where excessive vertical loads cause displacement and stress concentration near the top of the column. The bearing capacity can be improved by using a soil-cement bed over the stone columns, which reduces the bulging effect and increases the load-carrying capacity. The friction angle of the column and the undrained shear strength of the surrounding soil are key parameters that influence the ultimate bearing capacity. Inclined loading can also affect the bearing capacity, altering the failure mechanism and extending the failure surface. The use of multi-layer geosynthetic encasement can improve the stress transfer rate and increase the vertical ultimate bearing capacity of stone columns.
What mechanical properties of soil increases it load bearing capacity?3 answersThe load-bearing capacity of soil can be increased by certain mechanical properties. One such property is the inclusion of geosynthetic materials, such as geogrids, which have been shown to improve soil performance and reduce settlements. Another factor that can increase load-bearing capacity is the use of deep soil mixing (DSM) techniques, where soil is mixed with reagents like calcium carbide residue or rice husk ash, resulting in increased soil carrying capacity. Additionally, the stress diffusion and closure effect of a hard crust on unsaturated soft soil can also enhance its load-bearing capacity. It is important to note that the moisture content of soil has a significant impact on its load-bearing capacity, with an increase in moisture content leading to a decrease in bearing capacity.
Why is soil bearing capacity important for construction of a foundation?5 answersThe bearing capacity of soil is important for the construction of a foundation because it determines the ability of the soil to support the load from the superstructure. The bearing capacity is a key soil property required in foundation design. The nature and properties of the soil beneath a structure's foundation play a crucial role in how well the foundation performs under pressure. Weak soils can lead to additional vertical deformations and a decrease in the bearing capacity of the foundations. Soil investigation, including drilling, sampling, and testing, is necessary to determine the bearing capacity of the foundation. The foundation interacts with the soil to provide stability and support for the superstructure. The analysis of the bearing capacity of the foundation soil helps in determining the appropriate design and dimensions of the foundation, ensuring that it can support the loads encountered.
How can anchor ice affect sediment transport?5 answersAnchor ice can affect sediment transport in rivers. Studies have shown that when anchor ice is released from the bed, it can carry and transport sediment downstream. The sediment transported by anchor ice can include particles of various sizes, ranging from gravel and cobble to sand-sized material. The amount of sediment carried by anchor ice can be significant, with studies reporting sediment concentrations in released anchor ice ranging from 18.4 g/L to 28.2 g/L. The release of anchor ice can occur through various mechanisms, such as anchor ice rafting, ice jam breakup, and mechanical pushing of particles by drifting ice blocks. These findings highlight the importance of considering anchor ice in understanding sediment transport dynamics in rivers with ice cover.
Can you show me a figure stating the financial cost of determining the bearing capacity of soil?5 answersDetermining the financial cost of determining the bearing capacity of soil is not explicitly mentioned in the abstracts provided. However, the abstract by Namdar and Pelkomentions that the research work aims to assess the economical dimension of foundation design, which suggests that it may provide insights into the cost implications of determining bearing capacity. Additionally, the abstract by Adunoye and Agbedementions the use of a faster and economical method for determining bearing capacity, although it does not provide specific cost figures. It is important to note that without access to the full text papers, it is not possible to provide a definitive answer regarding the financial cost of determining the bearing capacity of soil.
What is the effect of dynamic loading on sand?5 answersDynamic loading on sand has various effects. The shear modulus of sandy soil decreases with increasing moisture content and density, but increases with increasing loading frequency. The shape of the footing also influences the bearing capacity of the soil under dynamic loading, with circular footings resulting in higher strain, displacement, and stress compared to square and rectangular footings. In rapid sand filters, the loading patterns of ammonia and dissolved organic matter affect the biodegradation of trace organic micropollutants, with different loading ratios and rates impacting the removal of specific compounds. Under high-frequency loading, there is a reduction in axial stress and volumetric strain in granular soil, with the reduction in stress and strain varying linearly with vibration acceleration. The liquefaction resistance of sand can be improved by increasing confining pressure, which decreases pore pressure and mitigates liquefaction hazards.