San Francisco : Architect and Engineer, Inc · leaf 484
ght feet below streetgrade is an alluvial granular material. Below thisfor an additional twenty-two feet is a porous jelly-like slippery clay. From that point to a depth ofseveral hundred feet there is a muddy gruel com-posed of 93 ^f water and 7% solid matter byvolume, interspersed at considerable… … • • . is trulymodernj Mexico City Tests in this section of the city indicate thatwhen soil is removed for an excavation, pressurecauses an upheaval of the bottom, as the waterlevel is but five feet below street grade. When anapplied load is heavier than the material re-moved, settlement occurs. It…
Architecture · Building
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
