Attachment to Sources Sought Notice-Sayers Stilling Basin Repairs.pdf

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

CABLES STRUNG FROM

LONGITUDINAL PLATFORMS

TO CONVEYANCE PIPE.

CONVEYANCE PIPE.

VERTICAL STEEL FRAME.

CONVEYANCE PIPE CARRIER

ON VERTICAL STEEL FRAME.

VERTICAL STEEL FRAME.

CONVEYANCE PIPE CARRIER

ON VERTICAL STEEL FRAME.

COFFER DAM.

CONVEYANCE PIPE

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

CABLES STRUNG FROM

LONGITUDINAL PLATFORMS

TO CONVEYANCE PIPE.

BULKHEAD.

CONVEYANCE PIPE.

EXAMPLE PHOTO NOT FROM SAYERS DAM EXAMPLE PHOTO NOT FROM SAYERS DAM

EXAMPLE PHOTO NOT FROM SAYERS DAMEXAMPLE PHOTO NOT FROM SAYERS DAM

EXAMPLE PHOTO NOT FROM SAYERS DAM EXAMPLE PHOTO NOT FROM SAYERS DAM

EXAMPLE PHOTO NOT FROM SAYERS DAMEXAMPLE PHOTO NOT FROM SAYERS DAM

TEMPORARY STEEL I-BEAM HANGAR STRUCTURE

- VIEW OUTLET CHANNEL DOWN STREAM

TEMPORARY CONVEYANCE PIPE TRANSITION FROM STEEL HANGAR

STRUCTURE TO VERTICAL STEEL FRAME - VIEW UP STREAM

TEMPORARY CONVEYANCE PIPE TERMINATION AT TEMPORARY

COFFERDAM

TEMPORARY CONVEYANCE PIPE & BULKHEAD AT TUNNEL OUTLET

- VIEW UP STREAM

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

CABLES STRUNG FROM

LONGITUDINAL PLATFORMS

TO CONVEYANCE PIPE.

BULKHEAD.

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

CABLES STRUNG FROM

LONGITUDINAL PLATFORMS

TO CONVEYANCE PIPE.

CONVEYANCE PIPE.

VERTICAL STEEL FRAME.

CONVEYANCE PIPE CARRIER

ON VERTICAL STEEL FRAME.

VERTICAL STEEL FRAME.

CONVEYANCE PIPE CARRIER

ON VERTICAL STEEL FRAME.

CONVEYANCE PIPE

COFFER DAM.

STEEL BEAMS SPANNING

BASIN WALLS.

LONGITUDINAL PLATFORMS

ON STEEL BEAMS.

CONVEYANCE PIPE.

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US Army Corps of

Engineers ® x

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Baltimore District

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GD003

VIEW

NORTH WEST

VIEW

WEST

VIEW

SOUTH

VIEW DOWNSTREAM

NORTH EAST

{620'}

{620'}

{605'} {595'}

{610'}

{600'} {595'}

{610'}

{630'}

{630'}

{630'}

{595'}

{620'}

{630'}{595'} {610'}

{620'}

{610'}

AREA ELEVATIONS ON THIS SHEET ARE APPROXIMATE AND ARE PROVIDED FOR WORK

STAGING AND ACCESS PLANNING ONLY. AREA ELEVATIONS ARE SHOWN AS {###'}

AND SHALL NOT BE USED FOR ESTIMATION OR DESIGN IN ANY CAPACITY. FOR

ELEVATIONS IN STILLING BASIN & CHANNEL SEE PROFILE SHEET CE101.

AREA ELEVATIONS

D R

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US Army Corps of

Engineers ® x

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N

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H

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Baltimore District

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S

CE305

{615'} {615'}

{615'}

570.5'

SECTION - PROPOSED WEDGE

[2 +0

C

[2 +8

.5

C

[2 +7

.7

C

4"

4"

4"

MINMIN

M

IN

M

IN

MIN

M

IN

" M

IN

EXISTING STILLING BASIN WALL

CONTROL JOINT BEYOND.

EXISTING WATER STOP IN

STILLING BASIN WALL BEYOND.

EXISTING CONSTRUCTION

JOINT IN STILLING BASIN

WALL BEYOND.

4'

K E Y

D E P

TH

APPROXIMATE KEY WIDTH

SPLICE PER

ACI

EXISTING

REINFORCING.

PROPOSED 4

EACH #4 HOOK

@12" O.C.

6"

SEE NOTE 7B

THIS SHEET

SEE NOTE 7B

THIS SHEET

570.0'

569.0'

568.0'

PROPOSED #4 HOOK

@ 12" EACH WAY

PROPOSED WEEPHOLE

EXTENSION, SEE NOTE 8.

SEE NOTE 7A THIS SHEET.

EXISTING WEEPHOLES.

PROPOSED

PERPENDICULAR

4 ROWS/3 EACH

#8 CONTINUOUS

PROPOSED ALL

PERPENDICULAR

ROWS

#6 @ 12" O.C.

E Q

E Q

E Q

E Q

E Q

E Q

E Q

E Q

E Q

E Q

PROPOSED

PERPENDICULAR

3 ROWS/5 EACH

#7 CONTINUOUS

PROPOSED

PERPENDICULAR

4 ROWS/5 EACH

#7 CONTINUOUS

PROPOSED #6 HOOK

PROPOSED

5 EACH #6 @ 12"

* NOTE

* NOTE - FOR INTERFERENCE BETWEEN HORIZONTAL LEGS

OF PROPOSED #4 HOOKS, HOOK SHALL BE ROTATED

ABOUT AXIS OF VERTICAL LEG NO MORE THAN NECESSARY

TO PROVIDE 1" CLEAR BETWEEN HORIZONTAL LEGS.

PROPOSED #8 @ 12"

PROPOSED #6 @ 12".

SEE NOTE 7A THIS

SHEET.#6 @ 12".

#6 @ 12".

1 2

PROPOSED DOWEL AND EPOXY

#4 HOOKS EMBED A MINIMUM OF

4-1/2" WITH HILTI HIT-HY200 OR

EQUAL, SEE NOTE 3.

PROPOSED #6 @ 12" O.C.

EXISTING

REINFORCING.

566.0'

AT SLAB

P R O

P O

SE

D

W E D G E

E X

IS

TI

N

G B A

SI

N

[2 +0

C

570.5'

PROJECTION

LINE OF

EXISTING

STILLING

BASIN SLOPE.

EXISTING

STILLING

BASIN

KNEEWALL.

PROJECTION

LINE OF

PROPOSED

WEDGE SLOPE.

PROPOSED

CONCRETE

WEDGE.

EX

IS

T

KN

EE

W

AL

L

INTERSECTION OF PROPOSED WEDGE

PROJECTION, EXISTING STILLING

BASIN SLOPE PROJECTION, STA.

[24+01C] & ELEV. 570.5'.

RA

DI

US

T

O M

AT

CH

564.5'

BOTTOM

OF KEY

C

LE

A R

C/L

8"

9"

PROPOSED

#6 @ 12"

NOTES:

1. CONCRETE STRENGTH PER SPECIFICATIONS.

2. PROPOSED CONCRETE WEDGE TO BE KEYED INTO EXISTING

STILLING BASIN SLAB. DEMOLITION WILL BE REQUIRED TO MAKE

KEY.

3. #4 HOOKS SHALL BE SPACED 12" ON CENTER, EACH WAY.

SUBMIT ADHESIVE FOR REVIEW AND APPROVAL, SEE SPECIFICATIONS.

4. ALL REINFORCEMENT AT CONCRETE WEDGE SHALL BE

EPOXY-COATED.

5. SPLICE REINFORCEMENT PER ACI 318-14.

6. CONCRETE WEDGE SHALL BE CONSTRUCTED IN A SINGLE

PLACEMENT.

7. ALL EXISTING CONCRETE SURFACES HAVING CONTACT WITH

PROPOSED CONCRETE WEDGE SHALL BE ROUGHENED TO RECEIVE

PROPOSED WEDGE. SEE "SECTION-PROPOSED WEDGE" THIS SHEET

AND "PLAN-PROPOSED LIMITS OF REPAIR" SHEET CP102 FOR LIMITS.

CONTRACTOR SHALL ENSURE ROUGHENED SURFACES ARE ONLY

PERFORMED TO THOSE SURFACES HAVING CONTACT WITH PROPOSED

WEDGE AND KEY. ROUGHENED SURFACES INCLUDE:

A) EXISTING SURFACES - STILLING BASIN WALLS (NOT SHOWN IN

SECTION), KNEEWALL AND STILLING BASIN SLAB. SLAB

ELEVATION = 566.0'.

B) EXCAVATION OF EXISTING SURFACES - HORIZONTAL AND

VERTICAL PORTION OF STILLING BASIN SLAB TO RECEIVE

PROPOSED WEDGE KEY.

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US Army Corps of

Engineers ® x

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Baltimore District

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CP301

PROPOSED

#4 HOOK

NOT SHOWN

FOR CLARITY

NOTES (CONTINUED):

8. EXISTING FOUR WEEPHOLES IN VICINITY OF PROPOSED CONCRETE

WEDGE SHALL REMAIN SERVICEABLE. CONTRACTOR SHALL FORM

AND EXTEND WEEPHOLES THROUGH PROPOSED WEDGE WITH

MATERIALS OTHER THAN METAL OR MATERIALS PRONE TO EXPOSING

NEW CONCRETE TO CORROSION RELATED DAMAGE. DIAMETER OF

WEEPHOLE EXTENSIONS SHALL MATCH EXISTING WEEPHOLES. AS SHOWN ABOVE, WEEPHOLES MAY INTERFERE WITH LOCATION OF REINFORCING. AS SUCH CONTRACTOR SHALL ADJUST REINFORCING AS NECESSARY WHILE MAINTAINING MINIMUM REINFORCING FREQUENCY, SIZE OF REINFORCING AND MINIMUM CONCRETE COVERAGE AS SHOWN ON THESE PLANS AND IN THE SPECIFICATIONS. SEE

SHEET CP102 FOR PLAN VIEW OF WEEPHOLES IN VICINITY OF PROPOSED WEDGE.

9. ALL EXISTING WEEPHOLES IN STILLING BASIN SLAB SHALL REMAIN SERVICEABLE. EXISTING WEEPHOLES IMPACTED BY PROPOSED WORK SHALL BE RECONSTRUCTED TO DRAIN AT TOP OF STILLING BASIN SLAB AT ELEV. 566.0'. CONTRACTOR SHALL FORM AND EXTEND WEEPHOLES WITH MATERIALS OTHER THAN METAL OR MATERIALS PRONE TO EXPOSING NEW CONCRETE TO CORROSION RELATED DAMAGE. DIAMETER OF WEEPHOLE EXTENSIONS SHALL MATCH EXISTING WEEPHOLES. SEE SHEET CP102 FOR PLAN VIEW OF

WEEPHOLES IN VICINITY OF PROPOSED REPAIRS.