PreliminaryPlans_4_of_4_OR_PRA_CRLA_2013(1).pdf

D.46

STATE PROJECT

NUMBER

SHEET

OR

PRA CRLA 2013(1)

c r la d z z a .d g n

U

S S u r

D

J

D o u c e y

C h e c k e d b

N

J e n k s s ig n e d b y

NPS PMIS No. 164576A NPS Drwg.No. 106/105450

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IO

D.47 c r la d z z b .d g n

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NPS PMIS No. 164576A NPS Drwg.No. 106/105450

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D.48 c r la d z z c .d g n

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D.49 c r la d z z d .d g n

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D.50 c r la d z z e .d g n

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D.51 c r la d z z f.

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D.52 c r la d z z g .d g n

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D.53 c r la d z z h .d g n

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D.54 c r la d z z i.

d g n

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NPS PMIS No. 164576A NPS Drwg. No. 106/105450

NO SCALE

FOOTNOTE:

Drilled rock bolt hole

Rock face

Hex nut

NOTE:

Stable rock Unstable block

Centralizer

Centralizer

De-air/grout tube

20° max.

Free stressing length (varies)

Minimum total rock bolt length

ROCK BOLT

DETAILS

ROCK BOLT AND ROCK DOWEL

ROCK DOWEL

Unstable block Stable rock

Centralizer Centralizer with keyhole and de-air/grout tube

" (nom.) bearing plate4 38" x 8" x

Minimum total rock dowel length

3.

2.

1.Rock face threaded steel bar continuously

Deformed

Hex nut

Flat or beveled washers max.

20°

De-air/grout tube with keyhole and de-air/grout tube

" (nom.) bearing plate4 38" x 8" x

D.55

STATE PROJECT

NUMBER

SHEET

OR PRA CRLA 2013(1)

P

M u ly

U

S S u r ft c m y fi le s p w p r o d u c ti o n d c r la d z z k .d g n

R

J o h n s o

D o u c

C h e c k e d b y

D e s ig n e d b y non-shrink cement grout

High early strength, Drilled rock dowel hole non-shrink cement grout

High early strength, threaded steel bar

Deformed continuously

Flat or beveled washer

(to be designed by contractor)

Minimum bond zone length bar. Place additional centralizers on 10-foot centers.

Place lowest centralizer within 12-inches of the distal end of the cement grout.

Fully encapsulate bar in high early strength, non-shrink to be determined by rock bolt contractor.

Drill hole diameter, bar size, and minimum bond zone length

Rock bolt design load is 25 Kips.

orientations shown in the plans or as directed by the CO.

Install rock dowels and rock bolts at the locations and of the existing roadway.

Two stage grouting is required for all rock bolts within 30-feet cut protruding end of bar following final grout set.

the existing road, remove bearing plate, washer, nut and

For all finished rock bolts and rock dowels within 30-feet of

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NOTE:

MESH DETAIL

DETAIL A

A between mesh and ground

Erosion control mat, type 5

Boundary rope

Boundary rope

S lo pe d is ta nc e roadway

Existing

Approx. rock surface with cobbles and bolders sand and gravel, Colluvium, silty, see Detail A

Boundary rope, see Detail A

Boundary rope, TYPICAL SECTION

CUT SLOPE STABILIZATION

Existing ground

2A

B

B

TYPICAL SECTION & DETAILS

ANCHORED MESH

D.56

STATE PROJECT

NUMBER

SHEET

OR PRA CRLA 2013(1)

P u ly

U

S S u r ft m y fi le s p w p r o d u c ti o n d c r la d z z l.

d

J o h n s

D o u c

C h e c k e d b y

D e s ig n e d b y

Typical anchor nail steel wire mesh

High tensile strength shown on plan boundary rope where

" Ø galvanized wire16

High early strength grout

FOOTNOTE:

d ista n ce

H o riz o n ta l

Anchor nail, typ.

steel mesh

High tensile strength spike plate, typ.

Diamond-shaped

ANCHOR TYPE

Type III (Lower Slope)

Type II (Mid Slope)

Type I (Upper Slope)

8.5

8.5

ANCHOR SPACING AND DEPTH

see Sheet D.57 for details

Typical anchor nail, ec na ts id spacing and depth

Type I Anchor spacing and depth

Type II Anchor

C, min. depth spacing and depth

Type III Anchor Slope break requirements rope per manufacturers

Attach the boundary ec na ts id rope anchor, typ.

nail for boundary

Additional anchor horizontal spacing.

For bottom row of Type II anchor spacing use Type II B horizontal spacing.

For bottom row of Type I anchor spacing use Type I B competant rock.

Extend anchor nail to depth shown on table or 5-feet into number of anchor nails.

See Sheet D.2 for general anchor nail layout and approximate ends with wire rope clips per manufacuturers requirements.

through each mesh opening to secure adjacent panels. Terminate

" dia. galvanized wire rope for seam lacing rope installed 16 5Use installed and before slope stabilization system has been installed.

Apply turf establishment to ground surface after nails have been

Place erosion control mat, type 5 between mesh and slope soil.

2.

1.

3.

(FT)

DISTANCE

HORIZONTAL

B

(FT)

SLOPE DISTANCE

HEIGHT

A

20° typ.

steel mesh

High tensile strength ep ol

S ' ep ol

S ' ec na ts id nails above slope break of 2 rows of anchor

Extend mesh a minimum

C

DEPTH

(FT)

Slope

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Varies - Colluvium

NOTE:

the top of grout limit shown bonding to bar tendon above

Wrap to prevent grout from

12" not protrude above the terrain line

Cut bar tendon so the head does

Diamond-shaped spike plate

D.57

NUMBER

SHEET

OR PRA CRLA 2013(1)

A

J u ly

U

S S u r ft m y fi le s p w p r o d u c ti o n d c r la d z z m .d

J o h n s

D o u c

C h e c k e d b y

D e s ig n e d b y

ANCHOR NAIL DETAILS

ANCHORED MESH

steel wire mesh strength

High tensile

Hex nut early strength grout

Top of high between mesh and ground

Erosion control mat, type 5

ANCHOR NAIL AFTER MESH INSTALLATION

DETAIL B

instead of cutting the bar.

elect to install the nail with the head below the terrain line

1. If depression is excavated prior to drilling, the Contractor may

TYPICAL ANCHOR NAIL INSTALLATION

DETAIL A

prior to drilling as shown on Detail B, around the nail location, shallow depression may elect to excavate a

Alternately the Contractor

5' - M inim um length into rock (typ.)

M in

Ø h o le

Face of rock self-drilling ground anchor

Anchor nail, hollow core

Sacrifical drill bit strength steel wire mesh placing and tensioning high tensile around each anchor nail prior to

Excavate a 12" dia. 12" deep hole early strength grout

Top of high strength grout

High early

High early strength grout

FOOTNOTE:

See Sheet D.56 for Anchor nail depth requirements.1

6" nom

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