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Driving piles, as opposed to drilling shafts, is advantageous because the soil displaced by driving the piles compresses the surrounding soil, causing greater friction against the sides of the piles, thus increasing their load-bearing capacity. Driven piles are also considered to be "tested" for weight-bearing ability because of their method of ...
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes.With better understanding of seismic demand on structures and with recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged.
Screw piles were first described by the Irish civil engineer Alexander Mitchell in a paper in Civil Engineer and Architect's Journal in 1848; however, helical piles had been used for almost a decade by this point. [2] Screw foundations first appeared in the 1800s as pile foundations for lighthouses, [3] and were extensively used for piers in ...
The eastern California shear zone is the portion of the Walker Lane that extends south from Owens Valley, and continues across and south of the Garlock Fault, across the Mojave Desert to the San Andreas Fault. [10]
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This was discontinued because the dowel bars tended to corrode and required frequent replacement. Stainless steel dowel bars are more resistant to corrosion, but stainless steel is relatively expensive compared to other materials. Instead, for several decades, the cohesion between the panels and the strength of the roadbed was relied upon to ...
Magmatism along strike-slip faults is the process of rock melting, magma ascent and emplacement, associated with the tectonics and geometry of various strike-slip settings, most commonly occurring along transform boundaries at mid-ocean ridge spreading centres [1] and at strike-slip systems parallel to oblique subduction zones. [2]
With a "general acute care hospital, correctional treatment center (CTC), licensed elderly care unit, in-patient and out-patient psychiatric facilities, a hospice unit for terminally ill inmates, housing and treatment for inmates identified with AIDS/HIV, general population, and other special inmate housing," [4] it is known as "the [California ...