Geoduck, I’m not seeing the danger… are you saying that the monument’s foundation should be deepened to reach unmovable blue clay rather than the composite sand/gravel/clay it is currently set into?
Are you saying there a danger of liquefaction of the fill, during an earthquake, as we saw in filled-in areas of the Marina District of San Francisco in 1989? Explain, please: We’re not geotechnical civil engineers here.
See Figure 8 in this Washington Monument geo-engineering PDF document if you really want a fright: http://casehistories.geoengineer.org/volume/volume1/issue3/IJGCH_1_3_3.pdf
Geoduck, I’m not seeing the danger… are you saying that the monument’s foundation should be deepened to reach unmovable blue clay rather than the composite sand/gravel/clay it is currently set into?
Are you saying there a danger of liquefaction of the fill, during an earthquake, as we saw in filled-in areas of the Marina District of San Francisco in 1989? Explain, please: We’re not geotechnical civil engineers here.