Spikes and rebar don't provide adequate support for stacked landscaping timbers in a retaining wall or other load-bearing structure. If you need your landscaping timber to hold up earth, large amounts of rock, or other heavy materials, you can anchor the entire structure to a deadman. This T-shaped anchor point can be made from concrete, two timbers fastened together or metal. Regardless of its construction, the deadman must be buried in the ground behind the wall and screwed firmly into the landscaping timber. This prevents the wall from sliding forward when the ground is waterlogged.
Double timber piles are used to support the guy wires of about 30m towers about 25 years ago.The ground (riverbed) is about 2m of clayey silt underlain by clean sand materials to a depth of 30m. The depth of anchorpiles are not known. Field inspection shows that the anchor piles are inclined 10-20 degrees towards the tower.For geotechnical performance monitoring of the anchor piles what approaches one should take.Appreciate your feedback in advance.RE: Timber Pile Anchors (Geotechnical) 27 Jun 10 20:05. Were the piles put in butt first or tip first? The former would offer greater uplift resistance than straight shafted piles; the later would offer less uplift resistance. Tomlinson suggests that the uplift resistance would be in the order of 50% of the compression value for granular soils. As the taper may make the resistance more detrimental, you might choose to use a reduction value in excess of 50%.
It might be a good idea to carry out a tension test if the pile is critical. I'd suggest googling tension capacity of timber piles. Their is a Timber Pile Manual on the net; it might have something in it. Don't have the time at this moment to find it. RE: Timber Pile Anchors (Civil/Environmental).
Timber Pile Anchors. Double timber piles are used to support the guy wires of about 30m towers about 25 years ago. The ground (riverbed) is about 2m of clayey silt underlain by clean sand materials to a depth of 30m. The depth of anchorpiles are not known. Field inspection shows that the anchor piles are inclined 10-20 degrees towards the tower. Landscape lumber, more commonly referred to as landscape timber, is used to and will remain attractive, you must anchor the wood securely to the ground. Get-Prices What Kind of Nails or Spikes for Landscaping Timber Home Guides.
Geotechnical monitoring -I would think the loads and soil are probably about the same now versus 30 years ago (e.g. It hasn't fallen down for 30 years), its the wood pile capacity you want to evaluate/test. Or are they planning to enlarge the tower loads and need to know if it has the required capacity?Are these a battered pair of piles, or are both vertical? If they are battered, then axial compressive/tensile capacity are more important, if not, then lateral pile capacity. Either way, you may want to talk to the wood technology people about how to estimate strength loss or decay, perhaps such as coring in to get small samples. I'm at a loss there.RE: Timber Pile Anchors (Geotechnical) 29 Jun 10 10:19. BigHI understand that by compression you mean bearing capacity.
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Am I right?At each anchoring position the twin timber piles were presumably driven vertically 25 years ago. Now the piles appear to lean towards the tension forces over time and they have currently an inclination of 11 degrees to 19 degrees. The maximum horizontal movement of the pile tops could reach to 320 mm. One of the question is how much inclination (or horizntal movement) is allowed. How much roration in the pile is acceptable, beyond which we may want to replace the piles. Thank you again.
![How To Anchor Timber To Timber How To Anchor Timber To Timber](/uploads/1/2/5/3/125375467/568112118.jpeg)
RE: Timber Pile Anchors (Geotechnical) 29 Jun 10 10:45. Yes - compression would be the 'bearing in vertical loading.' The way I would view this is the piles are starting to lean towards the same inclination as the guys - the tension vector. Of course as the piles 'lean' they are causing the soil to shift - moving into the soil in the direction of the tower (passive) and away in the opposite direction. Given that this is over time, I doubt that one would lose much as far as the tension capacity is concerned - it appears to be a creep situation if, in fact, there is any movement. The movement should stop when in line with the guys.
Why not put on movement pins - survey them from time to time and gather observational data before making any decision to replace. No need to replace unless it looks like the piles are starting to exceed the tension shaft friction. RE: Timber Pile Anchors (Structural) 29 Jun 10 19:56.