4.1.9.5.3b Satsop River Bridge N5 (Concrete Abutment)

 Description: Concrete Abutment


Prototype Information

There is no information on the southern abutment.

Engineering

 

The WWSL 

The two piers on the right hand side (P3 and P4) are supported by piles of earth. I started with wood blocks in the center, glue foam pieces around the blocks, and then shape the foam to the appropriate earth shape. The wood block is glued. then screwed from below to the module base.

Modeling Information

Manufacturers

Preliminary Preparation

  1. Wood parts will be cut and stained prior to assembly.
  2. Nut Bolt Washer parts will be painted prior to installation
  3.  

Scratchbuilding

DESIGNING THE BRIDGE

Selective compression of the pile trestle to a wood bulkhead, 5 pole bents and 2 steel bents. The maximum height of the pile bents will be distance from the top of the section subroadbed to the bottom of the mainline ties. That distance has been measured as xxxx inches. 

The concrete cap of the steel piles will be x long x wide and x high. the maximum height of the steel pile bent will be the distance from the top of the section subroadbed to the bottom of the mainline ties minus the height of the plate girder bridge. That distance has been measures as xxx inches.

BUILDING THE BRIDGE JIGS

There will be five jigs necessary. Jig 1 is for building the plank bulkhead. Jig 2 is for constructing the pole bents. Jig 3 is for building the steel bent. Jig 4 is for building the stringers. Jig 5 is actually a mold for constructing the cement top cap. See Jig Construction for further information

PREPARING THE MATERIAL

Cut the wood for the ents and stringers. Distress the wood as necessary. Stain the wood.

BUILDING THE BULKHEAD

  1. Construct the Bulkhead jig.
  2. Cut the top cap to length and place in the jig.
  3. Cut the legs to length.
  4. Glue the legs to the top cap
  5. Cut the horizontal and diagonals to length and place in the jig.
  6. Drill the NBW locations and glue and insert NWBs.
  7. Remove the bulkhead bent from the jig.
  8. Cut the bulkhead planks to length and place in the jig.
  9. Apply a light amount of glue to one side of the legs and replace the bulkhead bent in the jig.
  10. Apply weight to the assembly and allow to dry. 

BUILDING THE PILE BENTS

  1. Construct the pile bent jig.
  2. Cut the legs and top cap to length and placed in the jig. Use the jig as a guide to cut the angles on the tops of the legs.  
  3. Cut the side bracing on the legs while the wood is still in the jig.  Remove the bent from the jig and .
  4.  

TEEL BENT CONCRETE CAP
  1. Construct the concrete top cap jig. 
  2. Place the concrete top cap jig on a horizontal surface. Pour plaster into the cavity.
  3. Attach the steel bent to a machinist square with small rubber bands. 
  4.  When the plaster reaches a soft but not solid state, insert the steel bent assembly into the wet plaster. Adjust the bent for perpendicular and allow the plaster to harden.

BUILDING THE wood tie structure

  1. Construct the stringer jig.
  2. Cut the legs and top cap to length and placed in the jig. Use the jig as a guide to cut the angles on the tops of the legs.  
  3. Cut the side bracing on the legs while the wood is still in the jig.  Remove the bent from the jig and .

ut the styrofoam it approximate shape

vertical cuts measure and recut between piles 

use clay to go around piles

styro at bulkhead, 

then clay to fill in between piles

then styro again to next pile

then clay again

repeat

use artist spatula to shape clay around piles and level off withstyrofoam

then dirt etc for scenery

 

Turn the trestle around and glue the outside girts on the other side.  Let the glue set for a while before proceeding to install the inside girts and the diagonal side bracing.  See Figure 17.

Install the trestle assembly in the layout by cutting the legs off to the desired length and anchoring them in scenery plaster.

Pier 1 - two wood pile trestle bents with a concrete cap 

see union pacific common standards cs34 - light traffic lines  - https://donstrack.smugmug.com/UtahRails/Union-Pacific/CS-Book/i-Z8S2F3j/A

 

Mount the bridge girders on aluminum channel using Goo or similar flexible glue. ACC is

too brittle and styrene cement may not bond well to the material

from which the sides are made.

 

No comments:

Post a Comment

Subscribe to: Posts (Atom)