GEOTECHNICAL SOIL TEST REPORT - Cape EAPrac House Urbanik/BAR...sign of any surface seepage or marshy areas. Soil profile: The soil profile is expected to be fairly consistent across

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Consulting Geotechnical Engineers and Engineering Geologists iiaaiinn@@oouutteenniiqquuaallaabb..ccoo..zzaa Reg. No. 1999/062743/23

Outeniqua Geotechnical Services is a member of the Outeniqua Group of Companies

Members: Iain Paton Pr.Sci.Nat BSc (Hons) MSAIEG MSAICE Llewelyn Heathcote BTech BSc (Hons) MSAICE Avasheni Govender Associates: Alan Cook Pr. Eng. MSAICE Dennis McDonald Reg Eng Tech MSAICE

GEOTECHNICAL SOIL TEST REPORT Client: TCNO Architects Project: Portion 82 of Farm 216 Uitzicht, Brenton on Sea, Knysna Date of test: 13 August 2015

Geotechnical Constraint

Risk NHBRC ClassificationLow Medium High

Active clay X Compressible soil X X S1-S2 Collapsible soil X Imported/uncontrolled fill

X

Chemically aggressive soils

X

Saturated soils/ groundwater seepage

X

Shallow hard rock/ difficult excavations

X

Slope stability problems

X

Flood potential X Seismicity X Dolomitic land X

Disclaimer:The above classification is provided as a guideline and is true for the specific locations that were tested and may not be true for the entire site.

Site description:

The site slopes moderately to the west and there is no sign of any potential instability. The site is covered in thick fynbos vegetation and the ground is presently dry and accessible and there is no sign of any surface seepage or marshy areas.

Soil profile:

The soil profile is expected to be fairly consistent across the site. The soil profile consists of ~1m dark brown silty sand topsoil, underlain by light yellow aeolian sand. No bedrock is expected within at least 5m below the highest point on the site. DCPs indicate that the upper 1-1.5m is very loose to loose, but firms up progressively to a medium dense consistency below 1.5m. The sands are

generally permeable and stormwater will drain away relatively well. No groundwater seepage or water table was noted at the time of the investigation.

Recommendations:

Earthworks: Earthworks can be accomplished by hand or with machinery and all excavations are classified as soft. Insitu soils are considered suitable for structural backfilling (G7/8 quality). Sidewalls of excavations are unstable at near vertical angles and are only truly stable at an angle less than 35°.

Foundations and floors: The insitu sands require recompaction to carry load safely and the recommended foundation methods include RC strips or RC raft on a 1m thick engineered soil raft, consisting of recompacted insitu sand to 100% Mod AASHTO. An estimate of safe bearing pressure under this method is 150kPa at a nominal founding depth of 0.5m below ground/platform level.

Roads: All soils are of G7/8 quality and are suitable for use as selected subgrade material. All other layerworks will have to be imported, unless otherwise directed by the engineer on site.

Drainage: Subsoil drains are not envisaged due to relatively good site drainage.

Conclusions:

The site is considered suitable for the proposed development in terms of the information at hand but some engineering of the soil is required to improve bearing capacity. All information should be verified by the engineer once construction starts.

Iain Paton Pr.Sci.Nat. BSc Hons

Co-ords:

(0 to 900)

(900 to 2800)

Sidewall collapse - cohesionless soilNo water table

(0 to 1000)

(1000 to 2500)

Sidewall collapse - cohesionless soilNo water table

Very moist, light yellow, medium dense, intact, SAND, transported (aeolian).

NGL

Moist, dark brown, loose, intact, SILTY SAND, transported (Aeolian topsoil with roots)

Moist to very moist, light yellow, medium dense, intact, SAND, transported (aeolian).

Moist, dark brown, loose, intact, SILTY SAND, transported (Aeolian topsoil with roots)

Dynamic Cone Penetrometer (DCP)Sample taken Groundwater

Client:Project:

Datum: 23 Y-003409 X3771472Key to symbols:

Geotechnical Soil ProfileTCNO ArchitectsPortion 82 of Farm 216, (House Urbanik) Uitzicht

NGL

TP 1 23 Y-003408 X3771448

TP 2

Key to symbols:Datum: Dynamic Cone Penetrometer (DCP)

Sample taken

11.08.15TLB

Photo of Test Pit

Photo of Test Pit

Brenton on SeaArea:Date:Excavator:

Groundwater

Co-ords:

0

500

1000

1500

2000

2500

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0

500

1000

1500

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-3000

-2500

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th (

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th (

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B

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B

A

A

B

A

B

Co-ords:

(0 to 900)

(900 to 2700)

No water table

(0 to 900)

(900 to 2700)

No water table

Moist, dark brown, very loose - loose, intact, SILTY SAND, transported (Aeolian topsoil with roots)

Moist, dark brown, very loose, intact, SILTY SAND, transported (Aeolian topsoil with roots)

Very moist, light yellow, loose to medium dense, intact, SAND, transproted (aeolian).

Project:

Datum: 23 Y-003422 X3771469Sample taken

Sidewall collapse - cohesionless soil

Geotechnical Soil Profile

NGL

Brenton on Sea

NGL

TP 3 23 Y-003420 X3771488

TP 4

Sidewall collapse - cohesionless soil

Dynamic Cone Penetrometer (DCP)

Dynamic Cone Penetrometer (DCP)

Date:Excavator:

Groundwater

Key to symbols:

Photo of Test PitSample taken

Groundwater

Client:

Co-ords:

TCNO ArchitectsPortion 82 of Farm 216, (House Urbanik) Uitzicht

11.08.15CAT TLB

Photo of Test Pit

Moist, light yellow, loose-medium dense, intact, SAND, transproted (aeolian).

Key to symbols:Datum:

Area:

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-3000

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B

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B

A

A

B

A

B

Geotechnical Engineering ConsultantsRegistration No. 1999/062743/23

18 Clyde Street, Knysna : PO Box 964, Knysna, 6570Tel: 044 3820502 : Fax: 044 3820503 : e-mail: [email protected]

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I Paton (Member)

For Outeniqua Geotech. Services cc.

Technical Signatory

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2.

Customer :

Position:

Attention :

Members: I Paton (Pr.Sci.Nat. Geol) : L Heathcote (B-Tech. & BSc Hons. Civil) : Miss A Govender

This report (with attachments) is the correct record of all measurements made, and may not be reproduced other than with full written approval from the Members of Outeniqua Geotechnical Services cc.

Measuring Equipment, traceable to National Standards is used where applicable. Results reported in this Test Report relate only to the items tested and are an indication only of the sample provided and/or taken.

3. While every care is taken to ensure the correctness of all tests and reports, neither Outeniqua Lab nor its employees shall be liable in any way whatever for any error made in the execution or reporting of tests or any erroneous conclusions drawn therefrom or for any consequence thereof.

Datum Level: NGL

TEST REPORTDynamic Cone Penetrometer (DCP) - (TMH 6 Method ST6)

Rik Orts-Hansen No. of Pages :

Dec-14

Outeniqua Geotechnical Services cc.R-DCP-1-5

6571 Req. Number :

Date Received :Project :TCNO Architects

03.08.15Portion 82 of Farm 216, (House Urbanik) Uitzicht, Brenton on Sea

Belvidere EstateKnysna Date Reported : 11.08.15

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Documents

GEOTECHNICAL SOIL TEST REPORT - Cape EAPrac House Urbanik/BAR...sign of any surface seepage or marshy areas. Soil profile: The soil profile is expected to be fairly consistent across