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Pile cap extension of a Bridge Abutment

Useeeer

Structural
Jan 3, 2024
12
0
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IN
We are currently working on a proposal. Following is the overall scope

1. The Pilecap (PC) supports the bearing from a bridge spanning across a navigation channel
2. The PC is supported on ground with continuous sheet pile at front for retaining the soil and fill behind and few rear piles
3. Front sheet pile is corroded over period of time.
4. Scope is to build a new sheet pile in front and integrate it with existing PC

Advice is needed with respect to the integration part with existing PC
Abut_hn3m6z.jpg


The bearings are at 6m spacing. Question in can I consider the bearing load as UDL (considering 45-degree dispersion) between the new and box pile) to arrive at the design forces at interface (middle pile is assumed to be non-existent after some years). I'm worried about the dispersion since the bearing is just before the interface.

Without dispersion the shear is around 140T and the post installed anchors are not viable. Also, the gap between new and old pile will be filled with concrete.. will that contribute in load distribution?
 
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