Timber Post and Lagging Wall
Timber Post and Lagging Wall
(OP)
I am designing a small timber post and lagging wall. The structure is holding back 5.5 ft of sandy silt with groundwater estimated at 2 ft below ground surface behind the wall. Ground surface at the toe of the wall decreases at a 5:1 slope; ground surface behind the wall is flat. I am considering pure cantilever and anchored walls. A major limitation here is that the shoulder of an existing road is located about 12 ft from the wall, limiting the effectiveness of any deadmen/pile anchors that can be installed.
I have run through some calculations myself (dont have any software for this), but I dont do a lot of work with this type of design;I was hoping someone with more experience in the area could give me some kind of sanity check.
Is there a range you might expect for cantilever driven depths here? Would you expect anchors to be installed here (my calculations have them losing about 2/3 of their effectiveness due to the proximity to the wall)? What sizes and spacing might you expect for the posts of the cantilever and anchored design?
Thanks for the help
I have run through some calculations myself (dont have any software for this), but I dont do a lot of work with this type of design;I was hoping someone with more experience in the area could give me some kind of sanity check.
Is there a range you might expect for cantilever driven depths here? Would you expect anchors to be installed here (my calculations have them losing about 2/3 of their effectiveness due to the proximity to the wall)? What sizes and spacing might you expect for the posts of the cantilever and anchored design?
Thanks for the help





RE: Timber Post and Lagging Wall
RE: Timber Post and Lagging Wall
RE: Timber Post and Lagging Wall
RE: Timber Post and Lagging Wall
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From memory, expect to get very deep embedments (ie 1.5-2 x wall height). I was casting steel soldiers into concrete so had an effective resistive width a lot wider than the soldier itself, meaning I could get closer to equal retaining and embedment lengths.
Tiebacks would help though - I didn't look at those, however they are covered in that document.
RE: Timber Post and Lagging Wall