Research Papers Geotechnical Engineering

Research Papers Geotechnical Engineering-78
This load causes a lateral pressure to act on the system in addition to the basic earth pressure.One of the most famous methods is Boussinesq strip method.Excavation stability during construction is the primary concern in soft clays; an inadequate ...

This load causes a lateral pressure to act on the system in addition to the basic earth pressure.One of the most famous methods is Boussinesq strip method.Excavation stability during construction is the primary concern in soft clays; an inadequate ...

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The inside diameter of each basin is 60 ft; bottom of the excavation is 32 ft below grade and the excavation retained permanently by concrete secant pile walls.

The circular wall is constructed of 3 ft nominal diameter concrete piles overlapping adjacent piles by 6 in; the wall penetrates 60 ft below grade.

After many considerations on adjacent surcharge, it was found that the distribution of lateral surcharge had not accuracy, and the shape and also the magnitude of the lateral pressure were not correct.

In this paper besides considering the shape and magnitude ...

The fundamental cause of the failure is human error and is manifested in one or more of six categories.

(1) Before the investigation, during discussions with the client. A surcharge load is any load such as spoil embankments, streets or highways, construction machinery which is imposed upon the surface of the soil close enough or distance to the excavation.Several code-based equations exist today for design of the minimum transverse reinforcement required in the potential plastic hinge region of prestressed concrete piles.However, the reinforcement requirements of these equations differ drastically in some cases by as much as a factor of three.The seismic design of foundations for structures depends on dynamic bearing capacity, dynamic settlements and liquefaction susceptibility of soil.The dynamic bearing capacity problem has been attracting the attention of researchers during the last about fifty years.When a failure occurs, geotechnical engineers, engineering geologists, and geophysicists assign its cause to an event that immediately precedes the failure, such as an earthquake, heavy rainfall, flood, or other natural event.Assigning the failure to the immediate event is misplaced; the metastasis occurred because marginally stable conditions were allowed to exist through substandard investigations by the technical personnel, improper design, and inadequate review by the permitting agency.High vibrations and unacceptable dynamic settlements could disturb sensitive devices and people and even be the cause of structural damage.The dynamic sources, the geology at a site, and the condition of structures affect ground and structure vibrations.Basic concepts of pile dynamics and stress-wave measurements, which were developed for the determination of driving resistance and bearing capacity of impact-driven piles, provide important information about ground vibration induced by pile penetration.Dynamic hammer properties and geometry as well as the driving process are important for ground vibration emission from the pile.

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