1 / 12

Cantilever/Gravity Walls

Cantilever/Gravity Walls . Bar lists and estimates from standard design sheet . Cantilever/Gravity Walls. Cantilever walls have footings forward/back of the wall (wall is essentially a cantilevered structure Gravity walls have no footings .

feivel
Download Presentation

Cantilever/Gravity Walls

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cantilever/Gravity Walls Bar lists and estimates from standard design sheet

  2. Cantilever/Gravity Walls • Cantilever walls have footings forward/back of the wall (wall is essentially a cantilevered structure • Gravity walls have no footings http://content.answers.com/main/content/img/McGrawHill/atchitecture/f0169-02.png http://www.gravesconcrete.com/allaboutretainingwalls.htm

  3. Precast http://www.humes.com.au/ProdsServices/PrecastConcrete/PC_StorageWalls.shtml

  4. Standard Design Sheets-CIP • Cantilever/Gravity Wall Standard • Note: Not to be used for design!!!! Handouts are old, rescinded standard sheets given solely for the educational purpose of looking at details and deriving bar lists.

  5. Some assumptions used for std. design • Unit wt of earth – 120 pcf • Unit wt of concrete – 150 pcf • Active earth pressure of soil behind wall – 30 psf (level surcharge) • A one-ft depth of surcharge was applied above the toe of the footing. • Earth fill behind the wall was assumed w/ the top of finished grade 0.75 feet below wall coping

  6. All retaining walls are structures -----possible failure modes • Overturning • Sliding • Eccentricity (footing can lift) • Bearing pressure (footing can burrow into the soil) • Rotational stability • Settling

  7. Retaining Wall Failures • http://www.youtube.com/watch?v=EXjVXaqWDLo

  8. Example Given: • Stem 8’ • Min. Allowable soil pressure=1 Ton/sq ft • Design friction coefficient= 0.5 • Wall is 40’ long

  9. Example From Design Std: • Footing width: 5’-2” • Toe Projection: 1’-8” • T Bars #5@18” • H Bars #5@18” • D Bars #5@18” • B Bars #5@18” • Concrete Unit Quantity: 0.88 cy/lf

  10. Drawing/Bar Marks • Bar marks different than shown on standard drawings • E indicates epoxy coated bars

More Related