research-in-progress reliability based deep foundation .... moghaddam - r… · rex costley, pe...

RESEARCH-IN-PROGRESS

Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test

William D. Lawson, P.E., Ph.D.

Department of Civil and Environmental Engineering Texas Tech University

Rozbeh Moghaddam, MS

Department of Civil and Environmental Engineering Texas Tech University

STGEC 2013 44th Southeast Transportation Geotechnical Engineering Conference Crowne Plaza Hotel: Baton Rouge, LA Wednesday, December 4, 2013

ABOUT THE PROJECT

RESEARCH-IN-PROGRESS Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test

TCP Reliability Project Slide 2 STGEC: 4 DEC 2013

Project Stats

• SPONSOR: Texas Department of Transportation

• PROJECT NAME: Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test

• PROJECT ID: 0-6788

• BUDGET TOTAL: $399,845

• START DATE: 09/12/2012

• END DATE: 08/31/2014


Project Team • PROJECT MANAGER: Darrin Jensen (RTI)

• LEAD PROJECT ADVISOR: Sean Yoon, PhD, PE (BRG)

• PROJECT ADVISORS: Marcus Galvan, PE (BRG)

John Delphia, PE (BRG)

Rex Costley, PE (PHR)

Mainul Khan, PE (HOU)

• RESEARCH SUPERVISOR: William D. Lawson, PE, PhD

• CO-PI’S: Priyantha W. Jayawickrama, PhD Hoyoung Seo, PhD, PE James Surles, PhD Timothy Wood, MS

• STUDENTS: Rozbeh Moghaddam (doctoral) Paul Bartel (undergrad)


Industry Advisory Panel


Dan A. Brown, Ph.D., P.E., D.GE President/Senior Principal Engineer

Dan Brown and Associates, PC

Pat Hannigan, P.E. President and Illinois Branch Manager

GRL Engineers, Inc.

Peggy Hagerty Duffy, P.E. Technical Advisor

ADSC: The International Association of

Foundation Drilling

Mark McClelland, P.E. Senior Geotechnical Engineer

L&G Engineering & Laboratory

Robert Simpson, M.S. Western Regional Manager

Loadtest USA

Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test TxDOT 0-6788

• OBJECTIVE: To update Texas Department of Transportation (TxDOT) design guidance for deep foundations to reflect the reliability of the Texas Cone Penetration (TCP) based design method.

• OUTCOME: The study will evaluate the performance of the TCP method and will include calibration of the resistance factors for LRFD design of axially loaded drilled shafts and driven piles designed using TCP data.


DEEP FOUNDATION DESIGN AT TXDOT



Deep Foundations… TxDOT

• 30 percent of TxDOT deep foundations consist of piling; used mostly along Texas Gulf Coast

• Square, prestressed concrete displacement piles are the section of choice used by TxDOT; typical sizes are 16, 18 and 20 inch square

• 70 percent of TxDOT deep foundations are drilled shafts; typical diameters 30” and 36”


Field Test Method

Texas Cone Penetrometer

• Developed in 1949 • Useful for wide

range of SOIL and ROCK types and strengths

• Design charts related TCP values to soil bearing strength


TCP Test Origin and History

First Use of TCP

Test (1949)

Correlation

charts first

published (1956)

TCP data shown

in plans 1954)

Charts updated

in 1972

Charts updated

in 1982 Development of

TCP Test


Field Test Method

Texas Cone Penetrometer


The Design Charts TxDOT TCP Foundation Design Charts

• Refer to Chapter 5 – “Foundation Design,” TxDOT Geotechnical Manual

• Four Design Charts – Figure 5-1. Allowable Skin Friction

(TCP Values Softer than 100 Blows/12 in.)

– Figure 5-2. Allowable Point Bearing (TCP Values Softer than 100 Blows/12 in.)

– Figure 5-3. Allowable Skin Friction (TCP Values Harder than 100 Blows/12 in.)

– Figure 5-4. Allowable Point Bearing (TCP Values Harder than 100 Blows/12 in.)



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TCP Reliability Project Slide 15 DICEP: 23 October 2013

Reliability Analysis of TCP Method

• Compare predicted foundation capacity based on the existing TCP design method to measured capacity from full scale load tests in terms of skin friction and end bearing


The Required Data Set

FULL SCALE LOAD TESTS

• Scope – Drilled shafts

– Driven piles

• Required Parameters – Measured end bearing

– Measured side friction

• Extent – Complete test

– Loaded to failure

– Sufficient statistical power

CORRESPONDING TCP DATA

• Scope – Drilled shafts

– Driven piles

• Required Parameters – Predicted end bearing

– Predicted side friction

• Extent – Complete subsurface profile

– Full range of geomaterials

– Sufficient statistical power


WORK COMPLETED



TCP Reliability Project STGEC: 4 DEC 2013 Slide 19

TASK 2… COMPILE TXDOT LOAD TEST DATA

TxDOT 0-6788 Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test


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Load Test Year NO TCP DATA

Summary: TCP Data Available: 54 TCP Data Unavailable : 79 Total Number of Piles : 133

Summary of Available TxDOT Load Test Data, Driven Piles


Geographical locations of Load Tests for Driven Piles, Classified by Counties


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Load Test Year TCP DATA NO TCP DATA

Summary: TCP Data Available: 28 TCP Data Unavailable : 4 Total Number of Shafts : 32

Summary of Available TxDOT Load Test Data, Drilled Shafts


Geographical locations of Load Tests for Drilled Shafts, Classified by Counties


TASK 3… OBTAIN SUPPLEMENTAL LOAD TEST DATA

TxDOT 0-6788 Reliability Based Deep Foundation Design Using Texas Cone Penetrometer (TCP) Test


PHASE 1: Missouri and Arkansas TASK 3. Obtain Supplemental Load Test Data


Project

Site

State DOT/

Test Site

Location

Foundation

Type

No. of Load

Tests

Soil/Rock

Type

Number of

Geotechnical

Borings

Geotechnical

Boring Depth

(feet)

1 Warrensburg,

Missouri

Drilled

Shaft

15 Clay -

Weak

Rock

1 TCP

1 Correlation 50

2 Frankford,

Missouri

Drilled

Shaft

10 Clay-

Weak

Rock

1 TCP

1 Correlation 40

3 Siloam

Springs,

Arkansas

Drilled

Shaft

3 Hard Rock 1 TCP

1 Correlation 35

4 Turrell,

Arkansas

Drilled

Shaft

3 Sand-Clay

Mix

1 TCP

1 Correlation 100

5 Monticello,

Arkansas

Drilled

Shaft

3 Sand-Silt-

Clay Mix

1 TCP

1 Correlation 100

Totals 10 borings 650

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PHASE 1: Warrensburg, Missouri TASK 3. Obtain Supplemental Load Test Data


PHASE 1: Frankford, Missouri TASK 3. Obtain Supplemental Load Test Data


PHASE 1: Turrell, Arkansas TASK 3. Obtain Supplemental Load Test Data


PHASE 1: Monticello, Arkansas TASK 3. Obtain Supplemental Load Test Data


PHASE 1: Siloam Springs, Arkansas TASK 3. Obtain Supplemental Load Test Data


Watermelon Break


PHASE 2: Texas and Louisiana TASK 3. Obtain Supplemental Load Test Data


Drilling

Sequence State Test Site Location Soil/Rock

Type

Number

of Borings

Boring

Depth (ft)

1 TX Crosby, Tx clay - sand 1 75

2 LA Patterson Slough sand 1 75

3 LA Bickham Slough sand 1 100

4 LA Ragley Overpass clay 1 75

5 LA I-10 at Essen Lane clay 1 75

6 LA I-10 at Siegen to Highland clay 1 95

7 LA I-10 at Causeway Blvd Test Pile 1 clay 1 70

8 LA North Causeway Blvd Test Pile 3 clay 1 85

9 LA Little River Bridge at Zenoria clay 1 75

10 LA I-49 at US71 North clay - IGM 1 60

11 LA I-49 at Unknown Pond clay - IGM 1 70

12 LA I-49 at LA 170 clay 1 45

13 LA I-49 at Mynnerlyn Chapel Road clay - IGM 1 70

PH

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PHASE 2: Crosby, Texas TASK 3. Obtain Supplemental Load Test Data


PHASE 2: Ragley, Louisiana TASK 3. Obtain Supplemental Load Test Data


PHASE 2: Baton Rouge, Louisiana TASK 3. Obtain Supplemental Load Test Data


PHASE 2: New Orleans, Louisiana TASK 3. Obtain Supplemental Load Test Data


PHASE 2: Shreveport, Louisiana TASK 3. Obtain Supplemental Load Test Data


PHASE 3: New Mexico TASK 3. Obtain Supplemental Load Test Data


State Test Site Location Soil/Rock

Type

Number of

Borings

Boring

Depth (ft)

NM Ohkay Owingeh, NM at NM74/ Rio Grande sand 1 60

NM Albuquerque, NM at I-40 and the Rio Grande sand 1 70

NM Albuquerque, NM at I-25 and Lomas Blvd sand 1 65

NM Sunland Park, NM at Sunland Park Blvd/ Rio

Grande sand 1 90

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PHASE 3: Sunland Park, New Mexico TASK 3. Obtain Supplemental Load Test Data


PHASE 3: Albuquerque, New Mexico TASK 3. Obtain Supplemental Load Test Data


PHASE 3: Ohkay Owingeh, New Mexico TASK 3. Obtain Supplemental Load Test Data


ENER

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SUR

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TASK

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bta

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Load Test Dataset


State Driven Piles

Drilled Shafts

Texas 28 27

Arkansas -- 9

Louisiana 2 6

Missouri -- 25

New Mexico -- 4

Oklahoma -- 2

Total 30 73

Driven Pile Projects (30)


Drilled Shaft Projects (73)


WORK IN PROGRESS



Site Characterization


Load Test Interpretation


TCP Energy Analyses


Reliability Analyses


THANK YOU!!!

TCP Reliability Project STGEC: 4 DEC 2013 Slide 56

research-in-progress reliability based deep foundation .... moghaddam - r… · rex costley, pe...

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