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a class IV wall B RCP crossing the road would need at least a 50cm cover on top. as suggected by cap4000, try to refer to ASTM. I would not place coarse aggregates anywhere in contact with the pipe. use of selected earth fill would provide a better cushion aggainst abrasion of the culvert barrel.

thank you guys for the replies. for now the replacement option would tend to be the line we'll pursue.

thank you for the replies. the ogee dam is a small water impounding structure at the elevated section of an irrigation system with a service area of about 150 hectares.the structure lthough recently concstructed was not provided with as Focht3 noted an apron slab,the cut-off wall wa also omitted...

thanks brian.the irrigation system of which this structure is a part is ntended for rehab and i am just exploring the idea of maybe saving the existing structure due to economics.yes we will consult a specialist.

the existing overflow type dam for an irrigation project spans 30m across the waterway with a height of 6m. built without an apron slab on the downstream side, the dam is undermined and is hanging supported only by the abutments on both banks. any suggestions on how to rehabilitate. will...

thank you guys your inputs will provide us with more options to consider. the gabion blanket is very interesting. thanks again BigH. yes we are waiting for the figures on soil data and will also try to look into providing side drains on the toe of slope thanks again

thank you gabionguy.but what would be of best use is BigH's feedback on the performance of the gabion blanket under drain that he used. hope he replies again.

you may have to provide a typical section of the trench showing the depth of excavation and side slopes. for clay and of course depending on the depth of excavation, the side slope would be not less than 1:1 to keep it stable or you may have to provide sheetings in case you may want to limit the...

thanks guys for replying. 1. the "slip" section traverses along a 6% gradient with steep downslopes on the left and the spring on the right upslope. 2.after roadway excavation to widen the existing road the esposed side slopes showed this predominant grayish silty clay formation. on...

focht3 is right there are too many factors that affect the relationship between field and labo compaction effort. it would be a good practice to have "trial sections" conducted to gauge the compaction efficiency of available equipment.

grayish silty clay subgrade was exposed during roadway excavation.a three meter embankment fill placed directly on the clay subgrade slipped over the steep side slope after heavy rain.saturation of the subgrade affected by the spring located on right side upper slope.any suggestion on how to...