City of Buda 2014 Bond Program
October 2, 2017
GEOTECHNICAL INVESTIGATION AND PAVEMENT DESIGN 2014 Bond Program Proposition 3 - Streets
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – Investigation Scope of Work & Basic Design Criteria Drill 9 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Perform Nondestructive Deflection (NDT) and Falling Weight Deflectomoter (FWD) Tests to calculate existing subgrade parameters Design Two (2) Pavement Alternatives (Concrete vs. Asphalt) 20-Year Design Life (10-Year 1st overlay) TxDOT Pavement Design Guide & FPS21 Program – Flexible Pavement Traffic Parameters included: ¾ Average Daily Traffic (ADT) ¾ 18-kip equivalence factor ¾ ADT Growth Rate (4%) ¾ Directional / Lane Distribution factors ¾ Percent Trucks (6%)
Old Goforth Road – Testing Data Collection & Testing - 9 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Swell Test • Sulfate Test • Atterberg Limits • Pocket Pentrometer • Texas Triaxial - Project lies in the Pecan Gap Chalk area and Balcones Fault Zone - Sulfates were uniform - No groundwater encountered
Old Goforth Road – Pavement Analysis Testing Summary Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
22.1
4.1
31
Liquid Limit (%)
58
22
72
Plastic Index (%)
43
10
55
Existing Pavement • • •
1-inch HMAC 11-inches Flexible Base Clay Subgrade
Proposed Pavement Ph & Lime Series %
0
2
4
6
8
10
pH
8.39
12.17
12.44
12.50
12.52
12.55
• • •
3-inches HMAC (TY C or D) 13-inches Flexible Base 24-inches Lime Stabilized Subgrade
3 - 4 % Lime needed for stabilization
San Antonio Street / Garison Road
San Antonio St. – Investigation Scope of Work & Basic Design Criteria
Drill 2 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Determine Soil Stratigraphy Report Existing Pavement and Characterize Subsurface Testing and Reporting followed general guidelines from the TxDOT Pavement Design Guide
San Antonio St. – Testing Data Collection & Testing - 2 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Percent Passing #200 Sieve • Atterberg Limits • Pocket Pentrometer • Unconfined Comp. Stength • Sulfate/Chloride Content, pH - Project lies in the Fluviatile Terrace area in the Balcones Fault Zone - Sulfates were uniform - No groundwater encountered
San Antonio St. – Pavement Analysis Testing Summary
Existing Pavement
Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
18.2
7.4
29.2
Liquid Limit (%)
55
25
71
Plastic Index (%)
37
13
48
Ph & Lime Series %
0
2
4
6
8
10
pH
7.97
11.92
12.38
12.46
12.52
12.53
5 % Lime needed for stabilization
Main Street at RM 967
• • •
2-inch HMAC 7-inches Flexible Base Gravely / Clay Subgrade
Proposed Pavement • • •
4-inches HMAC (TY C or D) 7-inches Flexible Base (TY B) 6-inches Lime Stabilized Subgrade
Main at RM 967 – Investigation Scope of Work & Basic Design Criteria
Drill 2 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Determine Soil Stratigraphy Report Existing Pavement and Characterize Subsurface Testing and Reporting followed general guidelines from the TxDOT Pavement Design Guide
Main at RM 967 – Testing Data Collection & Testing - 2 Bores at 15-feet Depth - Testing included: • Moisture Content • Percent Passing #200 Sieve • Atterberg Limits • Pocket Pentrometer - Project lies in the Fluviatile Terrace area overlying the Austin Chalk area - Consisting of gravely subgrade w/ limestone - No groundwater encountered
Main at RM 967 – Pavement Analysis Testing Summary Laboratory Test
Existing Pavement Avg.
Min.
Max.
Moisture Content (%)
9.3
3.8
13
Liquid Limit (%)
42
20
65
Plastic Index (%)
25
8
45
• • •
3.25 - 3.5 inches HMAC 6 - 7 inches Flexible Base Gravely / Clay Subgrade
Proposed Pavement • • •
4-inches HMAC (TY C or D) 7-inches Flexible Base (TY B) 6-inches Lime Stabilized Subgrade
Main Street - Cabela’s Dr. to Railroad St. Section 1: West of Cabela’s Drive to Bradfield Park Cross Culverts
Section 2: Bradfield Park Cross Culverts to Railroad Street
Main Street – Investigation Scope of Work & Basic Design Criteria Drill 8 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Perform Nondestructive Deflection (NDT) and Falling Weight Deflectomoter (FWD) Tests to calculate existing subgrade parameters Design Two (2) Pavement Alternatives (Concrete vs. Asphalt) 20-Year Design Life (10-Year 1st overlay) TxDOT Pavement Design Guide & FPS21 Program – Flexible Pavement Traffic Parameters included: ¾ Average Daily Traffic (ADT) ¾ 18-kip equivalence factor ¾ ADT Growth Rate (4%) ¾ Directional / Lane Distribution factors ¾ Percent Trucks (9%)
Main Street – Testing Data Collection & Testing - 8 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Swell Test • Sulfate/Chloride Test • Atterberg Limits • Pocket Pentrometer • Texas Triaxial - Project lies in the Onion Creek Marl Austin Chalk areas - Sulfates encountered were higher - Groundwater encountered at 1 bore, 13.5’ deep
Main Street – Pavement Analysis Testing Summary Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
16.5
5.5
33
Liquid Limit (%)
47
20
74
Plastic Index (%)
32
6
52
Existing Pavement • • •
Proposed Pavement
Ph & Lime Series %
0
2
4
6
8
10
pH
8.66
12.75
12.84
12.85
12.85
12.86
• • •
Select Fill varies for areas with higher PI’s: 200-foot area east of Sequoyah & from 100-feet east of Hawk Ln to Bradfield Dr.
Construction Documents PLANS •
2 - 3.5 inches HMAC 6 - 21 inches Flexible Base Clay Subgrade
Typical Roadway Section
2-inches HMAC Surface (TY C or D) 8-inches HMAC Base (TY B) 12 - 18 inches Select Fill
Construction Documents MATERIAL SPECIFICATIONS • • • • • • • •
Project utilizes City of Austin Construction Specifications Item 201S – Subgrade Preparation Item 202S – Hydrated Lime Slurry ce e Item 203S – Lime Treatment for Material in Place Item 210S – Flexible Base Item 236S – Proof Rolling Item 301S – Asphalts, Oils and Emulsions Item 340S – Hot Mix, Asphaltic Concrete Pavement me entt
PROJECT MANUAL • •
Submittals – Material Suppliers for Approval Testing / Inspection – Contractor must replace any ny materials which fail testing parameters. Contractor o or must pay for retest on replacement materials.
Construction Inspection • •
City will provide or procure on-site construction inspection. Daily Report. • • • •
•
Construction Activities Equipment Utilized Photo Log Testing Results
Oversee and approve or reject field construction material tests. • Verify Placement and Condition of Erosion Control Measures and Traffic Control Signage • Project Representative to the Public
Materials Testing • City will provide or procure construction material testing. • Quality Assurance on materials / workmanship nship to verify contractor is meeting or exceeding ng project specifications.
QUESTIONS?
GEOTECHNICAL INVESTIGATION AND PAVEMENT DESIGN 2014 Bond Program Proposition 3 - Streets
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – FM 2001 to Green Meadows
Old Goforth Road – Investigation Scope of Work & Basic Design Criteria Drill 9 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Perform Nondestructive Deflection (NDT) and Falling Weight Deflectomoter (FWD) Tests to calculate existing subgrade parameters Design Two (2) Pavement Alternatives (Concrete vs. Asphalt) 20-Year Design Life (10-Year 1st overlay) TxDOT Pavement Design Guide & FPS21 Program – Flexible Pavement Traffic Parameters included: ¾ Average Daily Traffic (ADT) ¾ 18-kip equivalence factor ¾ ADT Growth Rate (4%) ¾ Directional / Lane Distribution factors ¾ Percent Trucks (6%)
Old Goforth Road – Testing Data Collection & Testing - 9 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Swell Test • Sulfate Test • Atterberg Limits • Pocket Pentrometer • Texas Triaxial - Project lies in the Pecan Gap Chalk area and Balcones Fault Zone - Sulfates were uniform - No groundwater encountered
Old Goforth Road – Pavement Analysis Testing Summary Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
22.1
4.1
31
Liquid Limit (%)
58
22
72
Plastic Index (%)
43
10
55
Existing Pavement • • •
1-inch HMAC 11-inches Flexible Base Clay Subgrade
Proposed Pavement Ph & Lime Series %
0
2
4
6
8
10
pH
8.39
12.17
12.44
12.50
12.52
12.55
• • •
3-inches HMAC (TY C or D) 13-inches Flexible Base 24-inches Lime Stabilized Subgrade
3 - 4 % Lime needed for stabilization
San Antonio Street / Garison Road
San Antonio St. – Investigation Scope of Work & Basic Design Criteria
Drill 2 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Determine Soil Stratigraphy Report Existing Pavement and Characterize Subsurface Testing and Reporting followed general guidelines from the TxDOT Pavement Design Guide
San Antonio St. – Testing Data Collection & Testing - 2 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Percent Passing #200 Sieve • Atterberg Limits • Pocket Pentrometer • Unconfined Comp. Stength • Sulfate/Chloride Content, pH - Project lies in the Fluviatile Terrace area in the Balcones Fault Zone - Sulfates were uniform - No groundwater encountered
San Antonio St. – Pavement Analysis Testing Summary
Existing Pavement
Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
18.2
7.4
29.2
Liquid Limit (%)
55
25
71
Plastic Index (%)
37
13
48
Ph & Lime Series %
0
2
4
6
8
10
pH
7.97
11.92
12.38
12.46
12.52
12.53
5 % Lime needed for stabilization
Main Street at RM 967
• • •
2-inch HMAC 7-inches Flexible Base Gravely / Clay Subgrade
Proposed Pavement • • •
4-inches HMAC (TY C or D) 7-inches Flexible Base (TY B) 6-inches Lime Stabilized Subgrade
Main at RM 967 – Investigation Scope of Work & Basic Design Criteria
Drill 2 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Determine Soil Stratigraphy Report Existing Pavement and Characterize Subsurface Testing and Reporting followed general guidelines from the TxDOT Pavement Design Guide
Main at RM 967 – Testing Data Collection & Testing - 2 Bores at 15-feet Depth - Testing included: • Moisture Content • Percent Passing #200 Sieve • Atterberg Limits • Pocket Pentrometer - Project lies in the Fluviatile Terrace area overlying the Austin Chalk area - Consisting of gravely subgrade w/ limestone - No groundwater encountered
Main at RM 967 – Pavement Analysis Testing Summary Laboratory Test
Existing Pavement Avg.
Min.
Max.
Moisture Content (%)
9.3
3.8
13
Liquid Limit (%)
42
20
65
Plastic Index (%)
25
8
45
• • •
3.25 - 3.5 inches HMAC 6 - 7 inches Flexible Base Gravely / Clay Subgrade
Proposed Pavement • • •
4-inches HMAC (TY C or D) 7-inches Flexible Base (TY B) 6-inches Lime Stabilized Subgrade
Main Street - Cabela’s Dr. to Railroad St. Section 1: West of Cabela’s Drive to Bradfield Park Cross Culverts
Section 2: Bradfield Park Cross Culverts to Railroad Street
Main Street – Investigation Scope of Work & Basic Design Criteria Drill 8 Boring Depths to 15 feet below existing grade Perform Laboratory Tests to determine physical and engineering characteristics Perform Nondestructive Deflection (NDT) and Falling Weight Deflectomoter (FWD) Tests to calculate existing subgrade parameters Design Two (2) Pavement Alternatives (Concrete vs. Asphalt) 20-Year Design Life (10-Year 1st overlay) TxDOT Pavement Design Guide & FPS21 Program – Flexible Pavement Traffic Parameters included: ¾ Average Daily Traffic (ADT) ¾ 18-kip equivalence factor ¾ ADT Growth Rate (4%) ¾ Directional / Lane Distribution factors ¾ Percent Trucks (9%)
Main Street – Testing Data Collection & Testing - 8 Bores at 15-feet Depth - Testing included: • pH-Lime Series • Moisture Content • Swell Test • Sulfate/Chloride Test • Atterberg Limits • Pocket Pentrometer • Texas Triaxial - Project lies in the Onion Creek Marl Austin Chalk areas - Sulfates encountered were higher - Groundwater encountered at 1 bore, 13.5’ deep
Main Street – Pavement Analysis Testing Summary Laboratory Test
Avg.
Min.
Max.
Moisture Content (%)
16.5
5.5
33
Liquid Limit (%)
47
20
74
Plastic Index (%)
32
6
52
Existing Pavement • • •
Proposed Pavement
Ph & Lime Series %
0
2
4
6
8
10
pH
8.66
12.75
12.84
12.85
12.85
12.86
• • •
Select Fill varies for areas with higher PI’s: 200-foot area east of Sequoyah & from 100-feet east of Hawk Ln to Bradfield Dr.
Construction Documents PLANS •
2 - 3.5 inches HMAC 6 - 21 inches Flexible Base Clay Subgrade
Typical Roadway Section
2-inches HMAC Surface (TY C or D) 8-inches HMAC Base (TY B) 12 - 18 inches Select Fill
Construction Documents MATERIAL SPECIFICATIONS • • • • • • • •
Project utilizes City of Austin Construction Specifications Item 201S – Subgrade Preparation Item 202S – Hydrated Lime Slurry ce e Item 203S – Lime Treatment for Material in Place Item 210S – Flexible Base Item 236S – Proof Rolling Item 301S – Asphalts, Oils and Emulsions Item 340S – Hot Mix, Asphaltic Concrete Pavement me entt
PROJECT MANUAL • •
Submittals – Material Suppliers for Approval Testing / Inspection – Contractor must replace any ny materials which fail testing parameters. Contractor o or must pay for retest on replacement materials.
Construction Inspection • •
City will provide or procure on-site construction inspection. Daily Report. • • • •
•
Construction Activities Equipment Utilized Photo Log Testing Results
Oversee and approve or reject field construction material tests. • Verify Placement and Condition of Erosion Control Measures and Traffic Control Signage • Project Representative to the Public
Materials Testing • City will provide or procure construction material testing. • Quality Assurance on materials / workmanship nship to verify contractor is meeting or exceeding ng project specifications.
QUESTIONS?
