geotechnical level 1 supervision report -...

TOTAL GEOTECHNICS

Adelaide, Ballarat, Brisbane, Hallam, Hoppers Crossing, Traralgon, Warrnambool

TG30027-43

Frostdale Civil Contractors 17/09/2015

Geotechnical Level 1 Supervision Report

58-98 Donald Road, Redland Bay.


Geotechnical – Level 1 Supervision Report

Report No: TG30027-43

Client: Frostdale Civil Contractors

17/09/2015

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Contents

1. Introduction ........................................................................................................................ 3

2. Scope of Works ................................................................................................................... 3

3. Inspections/Supervision ..................................................................................................... 3

4. Testing ................................................................................................................................ 4

5. Conclusion .......................................................................................................................... 5

6. Limitation of This Report .................................................................................................... 5

Appendix 1 – Site Plan ............................................................................................................... 6

Appendix 2 – Testing Summary ................................................................................................. 8

Appendix 3 – Site Photographs ................................................................................................ 20

Appendix 4 – NATA Lab Results ............................................................................................... 30





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1. Introduction

Total Geotechnics was engaged by Frostdale Civil Contractors on the 15 May 2015, to provide Level 1 Geotechnical Supervision Services in respect of the project lands sited at 58-98 Donald Road, Redland Bay (Refer Appendix 1 – Site Plans & Diagrams and Appendix 3 – Site Photographs).

This Geotechnical Level 1 Supervision Report (Level 1 Report) presents the results of supervision activities, compaction and moisture control, material placement and laboratory testing for earthworks afforded at 58-98 Donald Road, Redland Bay. This Level 1 report covers construction activities carried out from the 15th May to the 11th September 2015.

2. Scope of Works

The scope of works involved the placement of On-site General Fill. The General Fill material was

placed in Level 1 fill areas, in accordance with the provisions of AS 3798-2007, Guidelines on

earthworks for commercial and residential developments. For the purposes of AS 3798-2007, the

depth of FILL placed was less than 5 metres.

General fill material utilised in respect of the Level 1 earthworks was locally sourced on-site. The

Gerenal Fill Material comprised of Silt, Sand and Clay Materials.

The approved engineering drawings and specifications had the additional requirements that all

General Fill Materials once placed achieved a minimum 95% compaction and had a moisture content

variation of less the plus or minus 2% of optimum moisture content.

3. Inspections/Supervision

Full time Level 1 supervision and inspections were undertaken between; 15th May and the 11th September 2015, including supervision and inspections regarding the stripping and removal as per AS 3798-2007 Section 3, including the removal of:

Organic soils, such as topsoils, severely root affected subsoils and peat;

Contaminated soils ( Contaminated Soils were a part of the Brief );

Materials which undergo volume change or loss of strength when disturbed and exposed to moisture;

Silts, or materials that have deleterious engineering properties of silt;

Other materials with properties that are unsuitable for the forming of structural fill;

Fill that contains wood, metal plastic, boulders or other deleterious material, in sufficient proportions to affect the required performance of the fill.

The maximum particle size of any rocks or other lumps, within the layer has not exceeded two thirds (2/3) of the compacted layer thickness.





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The lots inspected were essentially homogeneous in relation to material type and moisture condition, rolling response and compaction technique. Prior to placement any existing filled ground, for which the conditions of the placement are not adequately documented, have not been assumed to have been of either standard compaction or of the composition adequate to support fill or any loads, has been removed (AS3798 Section 2o).

4. Testing

The Project was classified as Residential Development for the purposes of AS3798-2007 (refer Table 5.2), thereby requiring a minimum compaction result of 95% Standard Compaction for the cohesive soils (AS 1289 Section 5.7.1 & 5.1.1) present. AS3798-2007 further requiresd that a minimum of 3 tests per day be afforded in respect of the fill material being placed (refer AS3798 Table 8.1)

Testing was afforded using a Nuclear Density Gauge for field density determination per AS 1289 Section.5.8.1. Field testing was at a rate of 3 field density tests per day’s production, per the minimum requirements of AS 3798 – 2007. Field Testing was similarly afforded in respect of each layer of fill placed.

The filling operation was undertaken between the 15th May and the 11th of September 2015. The material was Site-derived General Fill. Material was placed in approximately 300mm loose layers, with compaction afforded by a 825 Compactor, the compactor sealing off each layer (of General Fill material). The individual loose layers were in-turn compacted to an approximate layer depth of 200mm. The individual layers were field tested to ensure the necessary compaction standard (95% Standard Compaction) was achieved, per Australian Standard requirements. The methodology adopted was considered the best method to achieve compaction using the plant and machinery available.

A moisture tolerance of plus or minus 2% of optimum moisture content was required per AS3798-2007 Section 5.3. The moisture content was similarly controlled within both the upper layer of uncompacted material and the material of the previously compacted layer, per (AS 3798-2007 Section 6.2.3).

As per AS3798-2007 Section 5.3, where reactive soils were used as fill, the placement moisture content was maintained within the specified range of 90-110% of the optimum moisture content, per (AS 1289. Section 5.7.1) or alternatively moisture variations were limited to 2%.

A total of No.29 Field density and Laboratory Hilf Compaction tests were performed. The reports verify the achievement of the minimum density requirement of 95% Standard Compaction throughout the full depth of the fill area, with each layer tested accordingly. All test results were provided to our client Frostdale Civil Contractors for inclusion within their internal quality system (Refer to Appendix B Summary of Results).

At the completion of the structural layers any material within 150mm of permanent subgrade level in cuttings was subjected to test rolling; test rolling was undertaken and the layers withstood test rolling without visible deformation or springing (AS 3798-2007 Section 5.5).





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The lots that are covered by this Geotechnical Level 1 Supervision Report are listed in the table below.

Table 1 - Lots under Level 1 Supervision

Lot,74 Lot,75 Lot,76 Lot,77 Lot,78 Lot,79

Lot,90 Lot,91 Lot,82 Lot,83 Lot,84 Lot,85

Lot,86 Lot,87 Lot,88

5. Conclusion

On the completion of the earthworks and after analysing the materials used, it has been concluded

that the filling procedure conducted by Frostdale Civil Contractors satisfied the requirements of AS

3798 in regards to the placement of fill materials on a project under Level 1 Supervision and in

accordance with the project specification as provided to Total Geotechnics.

This report has been prepared for the benefit of our client with respect to the particular brief given

to us and it may not be relied upon in other contexts or for any other purpose without our prior

review and agreement. No responsibility for this report will be taken by Total Geotechnics if it is

altered in any way, or not reproduced in full.

6. Limitation of This Report

This Level 1 Report is valid for a period of twelve months following completion of Level 1

Supervision. Total Geotechnics Pty Ltd does not accept responsibility for any distortion or deviations

of measurements as reported at the given time.

This report will be considered invalid if:

Any works were conducted on site without the supervision of a Total Geotechnics Pty Ltd

technician.

Any other unforeseeable event and any event outside of time as described above.

Authorised by:

Alvin Tan (BE Civil and Infrastructure) GradIEAust Geotechnical Engineer Mob: 0419 617 361

Prepared by:

Albert Roelofs (Brisbane Laboratory Manager) Geotechnical Officer- Nata Accreditation Mob: 0419 482 206





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Appendix 1 – Site Plan





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Appendix 2 – Testing Summary





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture Variation

(%)

Remark

Sample No. 4

Report No. 7

Lot 74

5m- Northern Boundary

8m- Eastern Boundary

RL:10.48 General Fill 28/05/2015 0 98.5% 0.5

Wetter

PASS

Sample No. 5

Report No. 7

Lot 75



Lot 75

RL:10.49 General Fill 28/05/2015 0 100.5% 2

Drier

PASS

Sample No. 6

Report No. 7

Lot 76



RL:10.23 General Fill 28/05/2015 0 96.5% 1.5

Wetter

PASS

Sample No. 7

Report No. 8

Lot 75

15m-Northern BDY

18m- Western BDY

NorthernBoundary

BoundaryBoundary


RL:10.84 General Fill 29/05/2015 0 99.5% 0.5

Drier

PASS

Sample No. 8

Report No. 8

Lot 76

18m- Northern BDY

4m- Western BDY

RL:10.58 General Fill 29/05/2015 0 98.5% 0.0

OMC

PASS

Sample No. 9

Report No. 8

Lot 77


8m- Western Boundary

RL:10.22 General Fill 29/05/2015 0 98% 0.5

Wetter

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture Variation

(%)

Remark

Sample No. 10

Report No. 9

Lot 77

12m- Northern BDY


RL:10.02 General Fill 01/06/2015 0 96.5% 0.0%

OMC

PASS

Sample No. 11

Report No. 9

Lot 76



RL:10.55 General Fill 01/06/2015 0 97% 0.0%

OMC

PASS

Sample No. 12

Report No. 9

Lot 75


12m- Southern BDY

RL:10.88 General Fill 01/06/2015 0 100.5% 2%

Drier

PASS

Sample No. 13

Report No. 10

Lot 74

6m- Southern BDY

8m- Eastern BDY

RL:10.79 General Fill 02/06/2015 0 99.5% 2%

Drier

PASS

Sample No. 14

Report No. 10

Lot 74


21m- Northern BDY

RL:10.82 General Fill 02/06/2015 0 99.5% 1.5%

Drier

PASS

Sample No. 15

Report No. 10

Lot 76


5m- Southern BDY

RL:10.68 General Fill 02/06/2015 0 100% 0.5%

Wetter

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture Variation

(%)

Remark

Sample No. 16

Report No. 11

Lot 78

9m- Southern BDY

3m- Eastern BDY

RL:10.52 General Fill 03/06/2015 0 98.5% 0.5%

Wetter

PASS

Sample No. 17

Report No. 11

Lot 79

6m- Southern Boundary

8m- Eastern BDY

RL:10.39 General Fill 03/06/2015 0 99.5% 0.0%

OMC

PASS

Sample No. 18

Report No. 11

Lot 77

5m- Southern BDY

4m- Eastern BDY

RL:10.33 General Fill 03/06/2015 0 98% 0.0%

OMC

PASS

Sample No. 19

Report No. 12

Lot 79

4m- Northern BDY

7m- Western BDY

RL:10.01 General Fill 04/06/2015 0 99.5% 0.0%

OMC

PASS

Sample No. 20

Report No. 12

Lot 80

5m- Northern BDY

4m- Western BDY

RL:10.08 General Fill 04/06/2015 0 100% 1.5%

Drier

PASS

Sample No. 21

Report No. 12

Lot 81

5m- Northern BDY

4m- Western BDY

RL:9.98 General Fill 04/06/2015 0 100% 2%

Drier

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture Variation

(%)

Remark

Sample No. 22

Report No.13

Lot 79

12m- Northern BDY

6m- Western BDY

RL:10.45 General Fill 05/06/2015 0 99.5% 1.5%

Drier

PASS

Sample No. 23

Report No. 13

Lot 80

10m- Northern BDY

2m- Western BDY

RL:10.35 General Fill 05/06/2015 0 98% 0.5%

Wetter

PASS

Sample No. 24

Report No. 13

Lot 81

12m- Northern BDY

8m- Western BDY

RL:10.28 General Fill 05/06/2015 0 99% 2%

Drier

PASS

Sample No. 25

Report No. 14

Lot 79

4m- Southern BDY

9m- Western BDY

RL:10.70 General Fill 09/06/2015 0 97.5% 0.0%

OMC

PASS

Sample No. 26

Report No. 14

Lot 80

6m- Southern BDY

3m- Western BDY

RL:10.59 General Fill 09/06/2015 0 97% 0.5%

Wetter

PASS

Sample No. 27

Report No. 14

Lot 81

5m- Southern BDY

5m- Western BDY

RL:10.60 General Fill 09/06/2015 0 98% 1.5%

Wetter

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 28

Report No. 15

Lot 88

5m- Northern BDY

7m- Eastern BDY

RL:10.58 General Fill 10/06/2015 0 97.5% 1.0%

Wetter

PASS

Sample No. 29

Report No. 15

Lot 87

10m- Northern BDY

5m- Eastern BDY

RL:10.81 General Fill 10/06/2015 0 98% 0.5%

Wetter

PASS

Sample No. 30

Report No. 15

Lot 87

8m- Northern BDY

12m- Eastern BDY

RL:10.67 General Fill 10/06/2015 0 97.5% 0.5%

Wetter

PASS

Sample No. 31

Report No.17

Lot 88

10m- Southern BDY

11m- Eastern BDY

RL:10.46 General Fill 25/06/2015 0 97.5% 1%

Wetter

PASS

Sample No. 32

Report No. 17

Lot 88

5m- Eastern BDY

16m- Southern BDY

RL:10.56 General Fill 25/06/2015 0 98.5% 0.5%

98.5%

PASS

Sample No. 33

Report No.17

Lot 88

6m- Western BDY

17m- Southern BDY

RL:10.79 General Fill 25/06/2015 0 99% 0.5%

Wetter

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 34

Report No. 18

Lot 87

16m- Southern BDY

5m- Western BDY

RL:10.52 General Fill 02/07/2015 0 99% 0.5%

Wetter

PASS

Sample No. 35

Report No. 18

Lot 87

10m- Southern BDY

8m- Eastern BDY

RL:10.90 General Fill 02/07/2015 0 99.5% 1%

Wetter

PASS

Sample No. 36

Report No. 18

Lot 87

20m- Southern BDY

15m- Western BDY

RL:11.20 General Fill 02/07/2015 0 101% 1%

PASS

Sample No. 37

Report No.19

Lot 83

20m- Southern BDY

15m- Western BDY

RL:10.30 General Fill 03/07/2015 0 98.5% 0.5%

Wetter

PASS

Sample No. 38

Report No. 19

Lot 84

20m- Southern BDY

15m- Western BDY

RL:10.55 General Fill 03/07/2015 0 97.5% 0.5%

Wetter

PASS

Sample No. 39

Report No.19

Lot 84

20m- Southern BDY

15m- Western BDY

RL:10.72 General Fill 03/07/2015 0 95% 0.0%

OMC

PASS





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 40

Report No. 20

Lot 83

12m- Northern BDY

3m- Western BDY

RL:10.52 General Fill 04/07/2015 0 99.5% 1.0%

Drier

Pass

Sample No. 41

Report No.20

Lot 83

7m- Southern BDY

5m- Eastern BDY

RL:10.78 General Fill 04/07/2015 0 100% 1.0%

Drier

Pass

Sample No. 42

Report No.20

Lot 84

9m- Southern BDY

6m- Western BDY

RL:11.10

General Fill

04/07/2015

0

99.5%

1.0%

Drier

Pass

Sample No. 43

Report No. 21

Lot 84

15m- Northern BDY

4m- Western BDY

RL:11.23 General Fill 06/07/2015 0 102% 2.0%

Drier

Pass

Sample No. 44

Report No. 21

Lot 84

13m- Southern BDY

8m- Eastern BDY

RL:11.50 General Fill 06/07/2015 0 100.5% 1.5%

Drier

Pass

Sample No. 45

Report No. 21

Lot 83

7m- Southern BDY

7m- Western BDY

RL:10.95 General Fill 06/07/2015 0 99.5% 0.5%

Drier

Pass





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Sample no. &

Report no.

Location Layer

RL:

Material Type

Date Tested Oversize (%) Density Ratio (%) Moisture

Variation (%)

Remark

Sample No. 46

Report No. 22

Lot 83

2m- Southern BDY

4m- Eastern BDY

RL:11.10 General Fill 07/07/2015 0 97.5% 1.0%

Drier

Pass

Sample No. 47

Report No. 22

Lot 84

5m- Southern BDY

6m- Western BDY

RL:11.31 General Fill 07/07/2015 0 98.5% 0.5%

Wetter

Pass

Sample No. 48

Report No. 22

Lot 85

10m- Northern BDY

4m- Western BDY

RL:10.40 General Fill 07/07/2015 0 97.5% 0.5%

Drier

Pass

Sample No. 49

Report No. 23

Lot 86

13m- Northern BDY

5m- Western BDY

RL:10.54 General Fill 08/07/2015 0 99% 1.0%

Drier

Pass

Sample No. 50

Report No. 23

Lot 87

9m- Southern BDY

3m- Western BDY

RL:10.71 General Fill 08/07/2015 0 97% 0.5%

Drier

Pass

Sample No. 51

Report No. 23

Lot 88

11m- Northern BDY

9m- Eastern BDY

RL:12.04 General Fill 08/07/2015 0 97% 0.5%

Wetter

Pass





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 52

Report No. 24

Lot 85

11m- Northern BDY

5m- Western BDY

RL:10.82 General Fill 14/07/2015 0 102% 1.0%

Drier

Pass

Sample No. 53

Report No.24

Lot 86

16m- Northern BDY

4m- Western BDY

RL:10.54 General Fill 14/07/2015 0 101% 1.0%

Drier

Pass

Sample No. 54

Report No.24

Lot 81

5m- Southern BDY

5m- Eastern BDY

RL:10.03

General Fill

14/07/2015

0

101.5%

1.0%

Drier

Pass

Sample No. 55

Report No. 25

Lot 81

14m- Northern BDY

8m- Western BDY

RL:10.35 General Fill 15/07/2015 0 99.5% 0.0%

OMC

Pass

Sample No. 56

Report No. 25

Lot 85

18m- Northern BDY

14m- Western BDY

RL:10.98 General Fill 15/07/2015 0 98.5% 1.5%

Wetter

Pass

Sample No. 57

Report No. 25

Lot 86

8m- Southern BDY

5m- Eastern BDY

RL:10.80 General Fill 15/07/2015 0 97.5% 2.0%

Wetter

Pass





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 58

Report No. 26

Lot 86

12m- Northern BDY

7m- Eastern BDY

RL:10.60 General Fill 16/07/2015 0 99% 0.5%

Wetter

Pass

Sample No. 59

Report No.26

Lot 85

10m- Southern BDY

8m-Eastern BDY

RL:11.31 General Fill 16/07/2015 0 97% 0.0%

OMC

Pass

Sample No. 60

Report No.26

Lot 81

9m- Northern BDY

6m- Western BDY

RL:11.26

General Fill

16/07/2015 0

95%

0.0%

OMC

Pass

Sample No. 88

Report No. 40

Lot 82

10m- Northern BDY

16m- Western BDY

Finish Layer General Fill 26/08/2015 0 98% 1.0%

Wetter

Pass

Sample No. 89

Report No. 40

Lot 86

18m- Northern BDY

6m- Western BDY


Wetter

Pass

Sample No.90

Report No.40

Lot 84

9m- Northern BDY

8m- Eastern BDY

Finish Layer General Fill 26/08/2015 0 98.5% 0.5%

Wetter

Pass





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Sample no. &

Report no.

Location

Layer

RL:

Material Type

Date Tested

Oversize (%)

Density Ratio (%)

Moisture

Variation (%)

Remark

Sample No. 93

Report No. 42

Lot 86

16m- Northern BDY

9m- Western BDY

Finish Layer General Fill 11/09/2015 0 95.5% 0.0%

OMC

Pass

Sample No. 94

Report No.42

Lot 87

11m- Northern BDY

13m- Western BDY


OMC

Pass

Sample No. 95

Report No.42

Lot 88

6m- Northern BDY

14m- Eastern BDY

Finish Layer General Fill

11/09/2015 0

100.5%

0.0%

OMC

Pass





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Appendix 3 – Site Photographs

1. Lots 74 & 75, Visual Inspection Of existing materials on-site.





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2.Lots 74 &75, Visual Inspection of existing materials on-site.

3.Level one filling, Lots 76,77 &78.





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4. Level one filling, Lots 79,80 & 81.





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5. Stripped Surface of Lots 81,82 83 & 84.





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6.Lots 88 Level one Filling

7.Stripped Surface, Lots 82





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8. Strip Surface Proof Roll, Lots 84 & 85.





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9. Start of project Lots 76 to 88.





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10. Stripped Surface Inspection, Lots 85 & 86.





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11. Stripped Surface Inspection, Lot 83.





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12. Stripped Surface Inspection, 88 to 82.





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Appendix 4 – NATA Lab Results





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