I am to provide a coefficient of vertical subgrade reaction for design of a mat slab over an older sandy fill material. Based on the dimensions of the mat slab the depth of influence is about 12 ft. Settlement analyses (Burland and Burbidge) indicate that up to 1 inch of settlement can be...
I often get requests to allow old AC pavements to be grinded and mixed with soil to be placed as a fill. Besided environmental issues, are there any legitimate reasons why this is a bad idea?
Background: Using Schmertmann's method I estimated settlement below a proposed column footing and recommended removals below the footing to reduce maximum settlement to less than one inch. I recommended that removals extend beyond the footing a distance equal to the removal depth. This is...
I am trying to estimate the secondary compression index following removal of a surcharge load. Is there a reasonable way to do this knowing the existing and future states of stress and C-alpha (normally consolidated)?
Is it appropriate to provide lateral earth pressure recommendations for design of a cantilever retaining wall that includes both active and at-rest values? For example, at locations where a wall turns, say 90 degrees, it is essentially restrained against rotation and therefore the strength of...
Gents,
A site in an alluvial deposit has a water table ranging in depth from about 18 to 24 ft (based on boring logs). The soil from a depth of 10 to 30 ft is a clay, generally consistent in color (munsell), water content (25 - 35%), dry density (85 - 95 pcf) and fines content (75 - 95%)...
A site consists of a soft clay deposit about 10 to 30 feet BGS. The ground water elevation is about 8 feet BGS. Dewatering is not an option for environmental reasons and therefore adequate removals can not be performed. An areawide fill 20 feet in height is proposed. Static settlements are...
Storm drain lines located up to 65 feet below existing grades will be supported by consolidated, sedimentary bedrock. Conventional grading methods will be used to install the lines, therefore at locations of manholes, the adjacent soils will consist of granular (SM and SP-SM with gravels)...
Local jurisdictions require that safety factor calculations for static slope stability and infinite slope stability be based on residual, drained shear strength parameters obtained using a direct shear machine. I am consistently getting values for cohesion around 100 to 200 psf, and values for...
