Retaining Structure for lake front
Retaining Structure for lake front
(OP)
Friends,
I have a client who is planning for constructing a buttress wall or repairing an existing timber soldier pile wall with dead man anchors. This wall is located at a lake shore and retains a private property. The wall is approximately 11 feet tall and 25 years old. 50 Percent of wall is damaged and or collapsed. We gave couple of options include segmental block retaining wall with clean stone/gravel backfill and steel soldier pile wall to buttress the existing wall. The client wants to use less expensive method. Obviously, it is S.R. wall. The problem is the distance between the new retaining structure and existing structure should not be grater than 2 feet. If it is more than 2 feet he will encroach lake boundary. The client wants to use any other sea wall options. Another important information is we can hit rock at shallow depths.
Does anybody know about any other kinds of wall be considered there? I will be very thankful to you.
I have a client who is planning for constructing a buttress wall or repairing an existing timber soldier pile wall with dead man anchors. This wall is located at a lake shore and retains a private property. The wall is approximately 11 feet tall and 25 years old. 50 Percent of wall is damaged and or collapsed. We gave couple of options include segmental block retaining wall with clean stone/gravel backfill and steel soldier pile wall to buttress the existing wall. The client wants to use less expensive method. Obviously, it is S.R. wall. The problem is the distance between the new retaining structure and existing structure should not be grater than 2 feet. If it is more than 2 feet he will encroach lake boundary. The client wants to use any other sea wall options. Another important information is we can hit rock at shallow depths.
Does anybody know about any other kinds of wall be considered there? I will be very thankful to you.





RE: Retaining Structure for lake front
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¡papá gordo ain't no madre flaca!
RE: Retaining Structure for lake front
Any other type of wall that could be built would probably need a temporary cofferdam to hold back the lake during construction. This cofferdam could be either an earthen embankment or a sheet pile wall. However, why build a temporary cofferdam plus a permanent bulkhead when you can just build a permanent sheet pile builhead without a cofferdam?
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RE: Retaining Structure for lake front
RE: Retaining Structure for lake front
RE: Retaining Structure for lake front
Rock within 6' of what? Original ground or lake bottom? In either case, 6' is not enough embedment to cantilever sheet piling for a wall with an 11' exposed height. Therefore, you would need tiedback sheet piling or a gravity wall and the temporary cofferdam.
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RE: Retaining Structure for lake front
Stacking them at a slight angle from vertical ought to avoid any tie backs, etc.
Cost is less than manufactured stone and the front sides look like "stone". Should be able to resist ice shoving and waves.
RE: Retaining Structure for lake front
RE: Retaining Structure for lake front
www.PeirceEngineering.com
RE: Retaining Structure for lake front
How expensive is this lakefront property or what is the sentimental value of this property to the owner. There are few options only and some of these have been discussed. Another option is to construct a micro-pile wall on the insid eof the existing wall. This will allow the piles to be embedded within the rock. This could be expensive but the owner has to weigh the consequences of costs etc. Permits to work on the lakeside of the property could be touchy given only 2 ft of space especially if excavation has to be undertaken etc. If working on the inside is acceptable then helical screw piles embedded to 6 ft depth is also a viable alternative by using verical and inclined anchors. The inclined anchors to be installed through the existing wall and tied to vertical helical piles. Low angle of installation of inclined helical piles would allow helical piles to act a deadman anchors. Use waler beams on the outside of deteriorating wall to tie tops of helical piles to deteriorating wall.
This is aretrofit situation and requires sitting on site abit and thinking about solutions. Desk studies not much value here. This is the real geotechnical engineering. Do not discredit existing structure as it still is doing some work and only needs some support for it to last another 25 years.