Geo tech project laboratory tests question - soil engineering

CEG 4011 Geotechnical Engineering I

(2019-2020) PROJECT PRESENTATION

Team Compaction

Buse Ilayda Oz Cristian Echeverria

Kevin Soler Errol Maynard

Ricquaz Brannon Eryc Martinez

Angel Duverge

Professor: Dhuruva Badri, PE

FLORIDA INTERNATIONAL UNIVERSITY

JULY 2020

• Project Background

• Development of the Program

• In-situ Testing Methods

• Lab Tests

• AASHTO Material Types

• Material Placement

• Construction Methods

• Conclusion

CONTENTS

1

PROJECT BACKGROUND

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● Roadway extension and improvement along SR 847/NW 47 Avenue including the intersections with

○ NW 203 Street ○ NW 203 Terrace ○ NW 206 Terrace ○ NW 207 Drive ○ NW 215 Street ○ Premier Parkway

● Natural elements: ○ Canal

● Can be analyzed in 3 sections according to the function of use:

○ Green area ○ Residential area ○ Commercial area

PROGRAM DEVELOPMENT

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Prior to construction, the soil at the site must be analyzed to determine the soil type and soil properties that are useful for the construction of the roadway. Lab and in situ test will be conducted in order to decide what type of soil is being used for construction. Understanding how the soil functions will help in how the soil is handled during construction.

It is important to know the project requirements and have as much information as possible to minimize backtracking. Things such as plan and profile sheets, project location, and structure location are very helpful.

In addition, it is necessary to collect relevant information to help understand the geology, geography, and topography of the area.

Review of the Existing Information

Field Investigation

Laboratory Testing

Analysis

PRELIMINARY GEOTECHNICAL REPORT

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Aerial Photographs

Present 03/2010

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Aerial Photographs

19881998 1973

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Aerial Photographs

194819531968

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County Soil Map

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FIELD EXPLORATION METHODS

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● Boring Methods: ○ Auger Borings ○ Rotary drilling

At least one boring shall be placed at each 100-foot interval. 48 borings will be needed. ● Sampling Methods:

○ Bag Bulk Samples Disturbed Soil Sample ○ Split Spoon Disturbed Soil Sample ○ Thin Wall Tube Undisturbed Soil Sample

● Geophysical Methods ○ Seismic Refraction and Reflection ○ Ground Penetrating Radar (GPR)

● In Situ Testing Methods: ○ Cone Penetration Test ○ In Situ Permeability Test

BORING

○ Seism ic Refra ction and Refle ction

○ Grou nd Penet rating Radar (GPR )

SAMPLING

○ Seism ic Refra ction and Refle ction

○ Grou nd Penet rating Radar (GPR )

DISTURBED SAMPLE

○ Seism ic Refra ction and Refle ction

○

UNDISTURBED SAMPLE

○

Classification Test

Moisture Density Test

Limerock Bearing Ratio (LBR) Test

Corrosivity Tests

Standard Penetration Test

○ ○

Permeability Test

Consolidation Test

Strength Test

○ ○

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● Before starting the boring process notify a facility which satisfies the Underground Facility Damage Prevention and Safety Act of the Florida Statutes.

● Sunshine 811 ● Mark all utility lines present along area of construction to

prevent damages when boring. ● Use hand augers near utility lines if they are too close to

surface or overcrowded. ● Drilling must not interfere with any welling operations

Precautions

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Should make a slide about the specifics of the bridge part and shallow/deep piles

Relate bridge borings to pile foundations

● Driven pile foundation is used ● They used 9 piles for each bent x 4 bents = 36 piles

● The type of pile friction or end-bearings piles?

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BRIDGE

LAB TESTS

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● Grain-Size Analysis ○ Sieve Analysis ○ Hydrometer Analysis

● Hydraulic Conductivity Analysis ○ Constant Head Test ○ Falling Head Test

● Compaction Tests ○ Standard Proctor Test ○ Modified Proctor Test

● Atterberg Limits ○ Liquid Limit ○ Plastic Limit

● Strength Tests ● Permeability Test ● Consolidation Test

https://gis.fdot.gov/arcgis/rest/services/Soil_Boring/D4_D6_Soil_Boring_view er/MapServer/0/83425/attachments/3256

AASHTO MATERIAL TYPES

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There are seven Major groups ranging from A-1 to A-7. ● Soils classified under groups A-1,

A-2, and A-3 are granular materials of which 35% or less of the particles pass through the No. 200 sieve.

● Soils of which more than 35% pass through the No. 200 sieve are classified under groups A-4, A-5, A-6, and A-7. These soils are mostly silt and clay type materials.

MATERIAL SELECTION

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● Above the Water Table: ○ Select Soils:

■ A-1(Limerock) ■ A-2-4 ■ A-3 (Sand)

○ Plastic Soils: ■ A-2-5, A-2-6, A-2-7 ■ A-4, A-5, A-6, A-7

● Below the Water Table: ○ Select Soils (A-1 and A-3)

■ A-2-4 is not used because it can not be properly compacted

MATERIAL SELECTION

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Pavement Section: ● Embankment:

○ If organics/muck or clay soils are present, remove and add select soils to prevent settlement

● Subgrade: ○ A-1 (Limerock)

● Base: ○ A-1 (Limerock) ○ If the water level is high:

■ Black Base Asphalt

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CONSTRUCTION PROCESS

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● Compaction Methods ○ Vibratory Rollers ○ Smooth wheeled roller

Note: Vibration limit needs to be below ….

● Compaction is tested using a nuclear density gage

Information about lifts rolls

Existing material = sugar sand (caving issues)

Clear out foliage

Find out order of operations for doing drainage, signs, rolling, paving, ect.

1. VBNM

CONCLUSION

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REFERENCES

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1. United States Department of Agriculture. Natural Resources Conservation Service. Web Soil Survey. https://websoilsurvey.sc.egov.usda.gov/WssProduct/0onbtifbq14sxeun3nvutnaj/GN_00000/20200721_143307020 64_1_Soil_Report.pdf

2. U.S. Geological Survey. Earth Explorer. https://earthexplorer.usgs.gov/ 3. U.S. Department of State Geographer. Google Earth Pro. 4. Florida Department of Transportation. Public Soil Boring Viewer.

https://gis.fdot.gov/Public_Soil_Boring_Viewer/ 5. https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/?cid=nrcs142p2_053375 6. Florida Department of Transportation. Soils and Foundations Handbook 2020

http://publicfiles.dep.state.fl.us/FGS/FGS_Publications/OFMS/CountyMaps/OFMS67-DADE.pdf

THANK YOU !