Plans

The shoring plans must completely identify the site constraints and the shoring system. Use the design templates provided in the appendix as an example to show the required information, specifications and drawings. The specific requirements of the plan submittals are as follows:

  1. General plan view should show:
    a. Railroad right-of-way and North arrow.
    b. Position of all Railroad tracks and identify each track as mainline, siding, spur, etc.
    c. Spacing between all existing tracks.
    d. Location of all access roadways, drainage ditches and direction of flow.
    e. Footprint of proposed structure, proposed shoring system and any existing structures if applicable.
    f. Proposed horizontal construction clearances. The minimum allowable is 12 feet measured at a right angle from centerline of track.
    g. Location of existing and proposed utilities.
    h. Drawings must be signed and stamped by a Licensed Professional Engineer, registered in the state where the work will be performed.
    i. Railroad and other “CALL BEFORE YOU DIG” numbers.
    j. Detailed view of shoring along with controlling elevations and dimensions.
  2. Typical section and elevation should show:
    a. Top of rail elevations for all tracks.
    b. Offset from the face of shoring system to the centerline of all tracks at all changes in horizontal alignment.
    c. All structural components, controlling elevations and dimensions of shoring system.
    d. All drainage ditches and controlling dimensions.
    e. All slopes, existing structures and other facilities which may surcharge the shoring system.
    f. Location of all existing and proposed utilities.
    g. Total depth of shoring system.
  3. General criteria
    a. Design loads to be based on the AREMA manual and Cooper E80 loading.
    b. Pressure due to embankment surcharges.
    c. ASTM designation and yield strength for each material.
    d. Maximum allowable bending stress for structural steel is 0.55Fy.
    e. Temporary overstress allowances are not acceptable.
    f. All timber members shall be Douglas Fir grade 2 or better.
    g. Insitu soil classification.
    h. Backfill soil classification.
    i. Internal angle of friction and unit weight of the soil.
    j. Active and passive soil coefficients.
    k. Fill within 100 feet of bridge ends or 20 feet outside culverts shall be placed and compacted to a minimum of 100% of maximum dry density tested per Modified Proctor ASTM D1557.
    l. Slopes without shoring shall not be steeper than 2 horizontal to 1 vertical
    m. Dredge line elevation.
    n. Shoring deflection to be calculated and meet Railroad requirements.
  4. Miscellaneous:
    a. Project name, location, GPS coordinates, track owner, Railroad line segment, milepost and subdivision in the title block.
    b. Procedure outlining the installation and removal of the temporary shoring system.
    c. General notes specifying material requirements, design data, details, dimensions, cross-sections, sequence of construction etc.
    d. A description of the tieback installation including drilling, grouting, stressing information and testing procedures, anchor capacity, type of tendon, anchorage hardware, minimum unbonded lengths, minimum anchor lengths, angle of installation, tieback locations and spacing.
    e. All details for construction of drainage facilities associated with the shoring system shall be clearly indicated.
    f. Details and descriptions of all shoring system members and connection details.
    g. Settlement and displacement calculations.
    h. Handrail and protective fence details along the excavation.
    i. Drawings must be signed and stamped by a Licensed Professional Engineer, registered in the state where the work will be performed.
    j. Call before you dig number.
    k. Construction clearance diagram.