Underpinning the Salt Lake Temple-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes the underpinning of the historic Salt Lake Temple, located near the Wasatch Fault. The site’s ground conditions include dense gravel and cobbles with sand and silt, underlain by silty sands and clays and additional gravel; groundwater is about 20 feet below the bearing layer.<br /><br />The existing structure imposes substantial foundation loads: wall footings are 16 feet wide and carry about 192 kips per linear foot, while tower footings are 35 feet wide and carry about 420 kips per linear foot, at a stated bearing pressure of 12,000 psf.<br /><br />Key design and construction constraints include fitting the work within a two-foot zone beside existing footings, maintaining consistent lateral support through the construction sequence, accounting for at-rest soil and surcharge pressures, and working with limited access and headroom. The design also had to accommodate construction tolerances associated with horizontal drilling through cobbles. The presentation’s agenda covers the retrofit scheme, underpinning design, construction highlights, and project summary, though the provided text does not include further technical details.

Keywords

Salt Lake Temple

underpinning

foundation design

Wasatch Fault

bearing pressure

wall footings

tower footings

groundwater

construction constraints

horizontal drilling