Geotech and Pavement Design Information
description
Transcript of Geotech and Pavement Design Information
Geotechnical Information for FM78 and Lakeview
1 boring made at 15 feet below surface
Description
Approximate
Depth of
Stratum (feet)
Material Encountered Consitency
/Density
- 0 to 1/2
1 1/2 inches of Asphalt over 4 inches of
Crushed Limestone Base Material -
Stratum I 1/2 to 1
Fill - LEAN CLAY (CL); dark brown and brown
mottled Stiff
Stratum II 1 to 7 CLAY (CH); dark brown Stiff to Very Stiff
Stratum III 7 to 15
CLAY (CH); yellowish brown and gray with
gypsum crystals Stiff to Very Stiff
Approximately 3 feet of clay should be removed and replaced with select fill
These conditions will satisfy a Condition C Foundation
*Note: Sample was taken less than 1000 feet away. This is the reason for the initial layer of asphalt in the boring sample.
Subsurface Information
Existing
Lean Clay Clay
Volumetric Changes moderate high
Plasticity Index (PI) 26% 35% to 54%
In-situ moisture content 3% 1% to 7%
SPT "N" Values 11 blows for 12"
penetration
10 to 25 blows for
12" penetration
Foundation Considerations
Shallow Strip Footings
Item Description
Bearing Stratum Select fill
Minimum embedment below final grade 24 inches below final grade
Bearing pressures Net allowable total load - 2,000 psf
Approximate total settlement 1 inch
Estimated approximate differential settlement 1/2 to 3/4 inch
Allowable passive resistance 1,000 psf per foot of depth
Coefficient of sliding friction 0.4
Uplift Resistance Foundation Weight (150 pcf) & Soil Weight (120 pcf)
Pavement Design Information
Flexible Pavement System
Component
Material Thickness (inches)
Parking Area Driveway
Asphalt (Type D HMAC) 1.5 2
Crushed limestone base 9 10
Moisture conditioned subgrade 6 6
Parameter Asphalt
Reliability (%) 70
Standard Deviation 0.45
Initial Serviceability Index 4.2
Terminal Serviceability Index 2
Design life of 10 years
2,000 ESAL per year in driveway areas
1,000 ESAL per year in parking areas
Porous Paver Information
Purchased from Belgard Company, Aqua-Roc Porous Paver will be used.
Component
Material
Thickness
(in.)
Vehicular Paver 3.15
#8 Aggregate 2
#57 Aggregate 6
#2 Subbase Aggregate 6
To be used in parking stalls, as well as parking lot walkways for foot trafic.
This material will support the stormwater runoff design.
Stormwater runoff will flow under the parking lot to a system of pipes, which will direct the water to a nearby
sewer easement.
This material will also give benefit to our LEED certification goals, and also meets ADA requirements
Asphalt Paving for Parking Areas, Assembly Costs
A vehicular porous paver will be purchased from manufacturer Belgard and used in the parking
stall areas, as well as foot traffic walkways.
For our required dimensions, a purchase price estimate including base aggregates and labor
was given to be roughly $7 per square foot.
Cost
Driveway
Parking Lot
3076 SY
24937 SF
55.98 Cost/SY
7 Cost/SF
172194 Cost
174559 Cost
Total
Cost 346753.5
Parking Lot Pricing
Asphalt Paving for Roadways, Assembly Costs
Craft@Hrs Unit Material Labor Equipment Total
Fine grading and compact
existing subbase [email protected] SY 0.01 2.89 2.69 5.59
Stone aggregate base,
Class 2, 10" thick [email protected] SY 8.35 2.2 2.05 12.6
Binder course 2" thick (9
SY per ton) [email protected] SY 11.3 1.71 1.59 14.6
Rubberized asphalt
interlayer [email protected] SY 1.28 0.22 0.2 1.7
Wear course 2" thick (9 SY
per ton) [email protected] SY 11.8 1.71 1.59 15.1
Tar emulsion protective
seal coat [email protected] SY 3.51 1.49 1.39 6.39
Total estimated cost for typical 10' wide roadway, 4" paving over 4" aggregate base
Cost per SY of roadway [email protected] SY 31.24 8.9 8.28 55.98
On-site roadway, with 10" thick aggregate base, 2" thick asphalt binder course, rubberized
asphalt interlayer, and 2" thick wear course.
All black areas will be made up of asphalt pavement as designed in the previous pages. The grey
sections, including the parking stalls and the walkways, will be made up of the aforementioned porous
paver.