john delphia design and construction of hybrid soil nail-mse wall
DESCRIPTION
soilsTRANSCRIPT
![Page 1: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/1.jpg)
The Design and Construction
of Hybrid Soil Nail/MSE Walls
John G. Delphia, P.E.
TxDOT Bridge Division
Geotechnical Branch
![Page 2: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/2.jpg)
COMMON RETAINING WALL TYPESMSECONCRETE BLOCK TEMPORARY EARTH SPREAD FOOTING
Gabions Drilled Shaft
Tiedback
Soil Nail
Hybrid Walls –
MSE/Soil Nail
RETAINING
WALL
SELECTION
FILL SITUATIONS CUT SITUATIONSCUT/FILL
SITUATIONS
DRILLED SHAFT
TIEDBACK
SOIL NAIL
MSE WITH SHORING
SPREAD FOOTING
WITH SHORING
DRILLED SHAFT
MSE WITH SHORING
SPREAD FOOTING
WITH SHORING
HYBRID – SOIL NAIL/MSE
MSE
CONCRETE BLOCK
SPREAD FOOTING
TEMPORARY EARTH
GABION
![Page 3: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/3.jpg)
MSE Wall
![Page 4: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/4.jpg)
Soil Nail Wall
“Texas Turn Around”
![Page 5: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/5.jpg)
Hybrid WallsMSE Wall in
front of a Soil
Nail Wall
Soil Nail Wall adjacent
to Tied-Back Wall
Soil Nail WallMSE
Wall
Tied-Back Wall Soil Nail Wall
Tied-Back WallSoil Nail Wall
![Page 6: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/6.jpg)
Widening of Existing Roadway
Fill Wall
Cut Wall
Existing Roadway
Geometry
Proposed Roadway
Geometry
What wall type would you choose?
![Page 7: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/7.jpg)
Shoring
Existing
Ground
![Page 8: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/8.jpg)
HYBRID SOIL NAIL/MSE WALL
MSE (Fill) Wall on top of Soil Nail (Cut) Wall
![Page 9: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/9.jpg)
HYBRID SOIL NAIL/MSE WALL
• Consider when existing ground line is not coincident with top of wall.
• Function of:– Wall Height; Fill vs. Cut
– Soil Conditions
– Aesthetic Considerations
– Phasing Requirements
– Etc.,
Very Project Specific
![Page 10: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/10.jpg)
Soil Nail WallFill vs. Cut
Fill < 3’
![Page 11: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/11.jpg)
Fill vs. Cut
Fill < 3’
![Page 12: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/12.jpg)
Hybrid Soil Nail/MSE Wall
Fill vs. Cut
Fill > 3’
Case 1 Case 2
![Page 13: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/13.jpg)
Case History 1 – IH 35 Comal Co.
Fill vs. Cut
Fill > 3’
Case 1
![Page 14: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/14.jpg)
Case History 1 – IH 35 Comal Co.
Cut = 28’
Fill = 10’
Existing
Ground
![Page 15: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/15.jpg)
• Establish wall geometry including bottom
of wall profile.
• Determine soil design parameters.
• Determine controlling loading condition
and appropriate analysis approach.
• Insure that the proposed wall geometry will
be globally stable.
Case History 1 – IH 35 Comal Co.
![Page 16: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/16.jpg)
Case History 1 – IH 35 Comal Co.
MSE Wall
Soil Nail WallTemporary
Special
Shoring
Soil Nail Wall
MSE Wall
GEOMETRY
![Page 17: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/17.jpg)
Design of the Soil Nail WallTwo Options
Option 1
Model the Entire System
Option 2
Model the Soil Nail Wall Only
& consider MSE Wall/Roadway
as a Surcharge & Horizontal
Shear
Surcharge from Roadway and Fill
Surcharge from Roadway
MSE Wall
Soil Nail
Wall
Fill
Soil
Nail
Wall
Horizontal Shear
at Base of MSE
Wall
![Page 18: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/18.jpg)
Option 1
Model the Entire System
Option 2
Model the Soil Nail Wall Only
& consider MSE Wall/Roadway
as a Vertical Surcharge &
Horizontal Shear
Nail Length = 28 ft Nail Length = 26 ft
![Page 19: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/19.jpg)
Nail Sizing Guidelines
• 8” diameter soil nails
• #8 grade 60 threadbar
• 3.5’ X 3.5’ horizontal and vertical
spacing
![Page 20: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/20.jpg)
Case History 1 – IH 35 Comal Co.
Global Stability Check
![Page 21: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/21.jpg)
Design Details• Not a Standard !!
• Not a proprietary system. No vendor.
• Complete details must be provided.
![Page 22: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/22.jpg)
Specific Nail Locations
11.5 ft
28.0 ft
![Page 23: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/23.jpg)
Case History 1Completed Temp. Face
![Page 24: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/24.jpg)
Case History 1Completed Temp. Face
![Page 25: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/25.jpg)
Case History 1Completed Temp. Face
![Page 26: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/26.jpg)
Case History 1 Finished Wall – Precast Panel Fascia
![Page 27: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/27.jpg)
Design Considerations
1. MSE Wall conflict with soil nails
2. Can a vertical wall face be used
instead of an offset wall face
![Page 28: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/28.jpg)
Design –
Project Specific
Conflicts at the Top of Wall
Soil
Nail
Wall
MSE
Wall
![Page 29: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/29.jpg)
Vertical Wall Face
Interface of MSE/Soil Nail Wall
![Page 30: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/30.jpg)
Vertical Wall FaceNote water seepage
from the panels with
horizontal joints near
the bottom of the MSE
Wall
Approximate location of the
bottom of the MSE Wall
![Page 31: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/31.jpg)
Vertical Wall Face
Interface of MSE/Soil Nail Wall
![Page 32: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/32.jpg)
Case History 2 – US 67 Sherwood Way
Fill vs. Cut
Fill > 3’
Case 2
![Page 33: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/33.jpg)
Case History 2 – US 67 Sherwood Way
![Page 34: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/34.jpg)
Case History 2 – US 67 Sherwood Way
![Page 35: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/35.jpg)
Case History 2 – US 67 Sherwood Way
![Page 36: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/36.jpg)
Case History 2
Constructing Gunnite
Fascia to receive TEW
![Page 37: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/37.jpg)
Case History 2
Finished Wall
![Page 38: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/38.jpg)
HYBRID SOIL NAIL/MSE WALL
• Consider when existing ground line is not coincident with top of wall.
• Function of:– Wall Height; Fill vs. Cut
– Soil Conditions
– Aesthetic Considerations (facing options)
– Drainage
– Phasing Requirements
– Etc.,
– Very Project Specific
In Conclusion:
![Page 39: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/39.jpg)
Questions?
![Page 40: John Delphia Design and Construction of Hybrid Soil Nail-MSE Wall](https://reader033.vdocuments.mx/reader033/viewer/2022050719/545eda72b1af9f5b058b48b1/html5/thumbnails/40.jpg)