level one inspection and testing services · 2020. 9. 23. · provide geotechnical inspection and...
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Tonkin & Taylor Pty Ltd Level One Inspection and Testing Services - Stage 7B, River Valley Estate, Sunshine North Maribyrnong Riverside Development Pty Ltd
June 2020 Job No: 1000780.1000.R3
REPORT
Level One Inspection and Testing Services
Stage 7B, River Valley Estate, Sunshine North
Prepared for
Maribyrnong Riverside Development Pty Ltd
Prepared by
Tonkin & Taylor Pty Ltd
Date
June 2020
Job Number
1000780.1000.R3
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Document Control
Title: Level One Inspection and Testing Services
Date Version Description Prepared by: Reviewed by: Authorised by:
24-06-20 1 Draft issued to client (final level survey pending)
P. Toro R. Barden T. Smith
08-07-20 1 Final issued to client P. Toro R. Barden T. Smith
Distribution:
Maribyrnong Riverside Development Pty Ltd 1 electronic copy
YourLand Developments Pty Ltd 1 electronic copy
Tonkin & Taylor Pty Ltd (FILE) 1 electronic copy
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Tonkin & Taylor Pty Ltd Level One Inspection and Testing Services - Stage 7B, River Valley Estate, Sunshine North Maribyrnong Riverside Development Pty Ltd
June 2020 Job No: 1000780.1000.R3
1 Introduction
As part of the construction of the River Valley Estate residential development in Sunshine North, Tonkin & Taylor Pty Ltd (T+T) has been engaged by Maribyrnong Riverside Development Pty Ltd to provide Geotechnical Inspection and Testing Authority (GITA) services for the earthworks within Stages 7A and 7B. This report presents the density testing for Stage 7B for the supervision works carried out from 15 June 2019 until 26 March 2020. A separated report presenting the test results for Stage 7A has been prepared.
2 Project details
2.1 Location
The site is situated within an area of previous basalt quarrying activities. Stages 7A and 7B are located on sloping ground between the old quarry pit and the Maribyrnong River. The proposed use for the site is to raise site levels and to develop the new surface for a residential subdivision, including pavements, service connections and residential lots.
The project included the preparation and filling of lots 30 to 45 in stage 7B and River Valley Boulevard from chainage CH 0.000 to CH 538.899. The specification required the earthworks to be completed under Level 1 Supervision, that is, full-time Inspection and Testing of the earthworks. Chadwick Geotechnics were onsite for the duration of the earthworks program.
2.2 Specification
A specification for the bulk earthworks for both stages was prepared by T+T in May 20181. It was specified that all residential lot subgrade fill shall be compacted to achieve at least a Maximum Dry Density (MDD) ratio of 95% Standard compaction in accordance with AS 1289.5.3.1 (or at least a 95% Hilf Density ratio in accordance with AS 1289.5.7.1) and 98% Standard compaction in accordance with AS 1289.5.3.1 (or 98% Hilf Density ratio in accordance with AS 1289.5.7.1) for all pavement filling. The moisture variation shall not exceed ±2% for pavements and residential lots.
2.3 Roles
The organisations and their roles are presented in Table 2.1 below.
Table 2.1 Project roles
Role Organisation
Owner Maribyrnong River Developments Pty Ltd
Developer YourLand Developments Pty Ltd
Geotechnical Inspection and Testing Authority (GITA) Tonkin & Taylor Pty Ltd
Geotechnical Testing Authority (GITA) Chadwick Geotechnics Pty Ltd
Designer / Superintendent Dalton Consulting Engineers Pty Ltd
Earthworks Contractor Winslow Constructors Pty Ltd
1 Tonkin & Taylor Pty Ltd (May 2018) River Valley Estate Stages 7A and 7B Bulk Earthworks Specification. Ref. 1000780.S1v2.
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Tonkin & Taylor Pty Ltd Level One Inspection and Testing Services - Stage 7B, River Valley Estate, Sunshine North Maribyrnong Riverside Development Pty Ltd
June 2020 Job No: 1000780.1000.R3
3 Source of material
The material imported and placed at the Site by Winslow was assessed by Winslow’s consultants as being derived from natural soils and meeting the classification of ‘Fill Material’ as defined in EPA Publication IWRG621.
4 Inspection and testing The inspection and testing of earthworks have been carried out in accordance with AS3798-2007, ‘Guidelines on earthworks for commercial and residential developments’, with a frequency of field density tests as per a type 1 project (large scale operation). Compaction control laboratory testing was undertaken by Chadwick Geotechnics’ NATA accredited laboratories in accordance with AS1289 ‘Methods of Testing Soils for Engineering Purposes’.
Prior to fill being placed the subgrade was inspected. Significant excavation was required to remove existing uncontrolled fill to expose the natural subgrade. The inspections were performed in accordance with the Level 1 guidelines presented in AS 3798–2007 Section 5.5. No soft spots were encountered during the inspections, the area was found to be firm and free of vegetation and other deleterious material. All pre-existing uncontrolled fill was removed prior to the placement of engineered fill to achieve the design levels.
Full time Level 1 Inspection and testing of the filling operations commenced on 30 October 2018 and was completed on 28 April 2020. During this period Chadwick Geotechnics was on site all the time (except when there were no earthworks) and observed the earthworks , the placing of fill including the supply of material, conditioning of material (moisture conditioning and oversize removal), placement and compaction of the fill material.
All fill material was placed in lift sequences and Chadwick Geotechnics verified that the surface of the stripped subgrade and additional lifts were thoroughly scarified and moisture conditioned prior to placement of additional layers to prevent delamination at the layer interface. The survey of the stripped surface/subgrade prior filling and the final surface after filling has been carried out by Taylors and is presented in Appendix B.
Field density and moisture content testing was carried out using a calibrated portable density and moisture gauge in accordance with AS 1289.5.8.1. The HILF rapid compaction test was used for peak converted wet density determinations in accordance with AS 1289.5.7.1. Test locations were recorded using a handheld GPS unit and levels, shown in test reports, were provided by Winslow. A site plan showing the field density test locations is provided in Appendix A. Coordinates of the tests are presented within the summary table of Hilf density tests in Appendix C.
A total of 184 tests have been performed in stage 7B during the filling process. The results show that all tests met the specification requirements for the project. The final results show the tests achieved the specification requirements for the project. A summary table of Hilf density tests is provided in Appendix C and the Hilf density test reports are provided within Appendix D.
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Tonkin & Taylor Pty Ltd Level One Inspection and Testing Services - Stage 7B, River Valley Estate, Sunshine North Maribyrnong Riverside Development Pty Ltd
June 2020 Job No: 1000780.1000.R3
5 Conclusion
On the basis of our inspections and after considering all test results relating to the project, it is our opinion, so far as it is able to be determined, that:
• The materials used by the earthworks contractor met the geotechnical property requirements of the specification.
• The fill material placed was tested at a suitable frequency in accordance with AS 3798-2007- Table 8.1 and the results indicate the compacted material achieved the minimum density requirement of the specification.
• Given the consistent construction practices followed by the earthworks contractor, and as witnessed by Chadwick Geotechnics, combined with the satisfactory verification of test results achieved, it is inferred that areas of the site between test locations were performed to the same standard as those areas that have been tested.
It is our opinion that the earthworks undertaken have been performed in accordance with the requirements of Section 8.2 of AS3798-2007 - Level 1 Inspection and Testing.
6 Applicability
This report has been prepared for the exclusive use of our client Maribyrnong Riverside Development Pty Ltd, with respect to the particular brief given to us and it may not be relied upon in other contexts or for any other purpose, or by any person other than our client, without our prior written agreement.
Recommendations and opinions in this report are based on data from discrete investigation locations. The nature and continuity of subsoil away from these locations are inferred but it must be appreciated that actual conditions could vary from the assumed model.
Tonkin & Taylor Pty Ltd
Report prepared by: Authorised for Tonkin & Taylor Pty Ltd by:
.......................................................... ...........................….......…...............
Pablo Toro Trevor Smith Senior Geotechnical Engineer Project Director
9-Jul-20 \\meldc1\corporate\south melbourne\projects\1000780\1000780.1000\workingmaterial\level 1 final report data\1000780.1000.r3 level 1 report for stage 7b.docx
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Appendix A : Site plan
• Figure 1 Overall plan
• Figure 2 Sheet 1 of 3
• Figure 3 Sheet 2 of 3
• Figure 4 Sheet 3 of 3
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B2 K&C
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DDDDD
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ER "C
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D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D
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B2 K
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42
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40
31
41
36
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GGGGGGGGG
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GG
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ES20.31
ES13.77
ES13.67
SM2 K&C
ES16.07
ES14.61
ES15.34
ES15.55
ES16.06
ES16.63
ES16.46
ES16.80
ES18.17
ES18.03
ES18.57
ES17.54
ES18.57
ES20.57
ES20.75
ES21.47
ES20.99
ES21.15
ES20.57
1112
14
5184 50
52
8687
8889
7473
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18 78
6566
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RETAINING WALL "D" TB14.920
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17.38
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DD
DD
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GCGC GC
GCGC
GCGC GC
GCGC
GCGC GC
GCGC
GCGC GC
GCGC
GCGC
GCGC GC
GCGC
GCGC GC
GCGC
GCGC GC
GCGC
GCGC GC
GCGC
GCGC
GC
GC
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GC
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GC
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GCGC
GCGC
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GC
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GC
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GCGC
GCGC
GCGC
GCGC
GCGC
GCGC
GCGC
GCGC
GCGC
GCGC
GC
SS
S
EP18
90
89
88
87
86
85
83
8281
80
79
78
77
76
7574
73
72
71
70
69
68
67
66
65
64
63
62
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
633
632
631
630
629
628
627626
625 624
623
622
621
620
619
618
617
616
615
614
613
612
611
610
609
608
607
606
605
604
603
602
601
598
597
596
595
594
593
592
591
590
589588
587
586
585
584
583
582
581
580
579
555
554
553
549
548
547
546
545
544
543
542
541
540
539
536
535
534
533
530
529
528
527526
525
524
523
522
521
520
519
518
516
515
514
513
512
511
497
496
415
414 413
412
411
343
342
335
334
136
135
134
133
132131
130
129128
127
126
125
124
123
122
121
120 119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
61
60
28
27
26
25
24
634
600
599
578
577
576
575
574
573
572
571
570
569
568
567
566
565
564
563
562
561
560
559
558
557
556
552
551
550
538
537
532
531
517
510
509
508
507
506
505
503
504
502
501
500
499
498
495
494
493
492
491
490
489
488
487
486
485
484
483
482
481
480
479
478
477
476
475
474
473
472
471
470
469
468
467
466
465
464
463
462
461
460
459
458
457
456
455
454
453
452
451
450
449
448
447
446
445
444
443
442
441
440
439
438
437
436
435
434
433
432
431
430
429
428
427
426
425
424
423
422
421
420
419
418
417
416
410
409
408
407
406
405
404
403
402
401
400
399
398
397
396
395
394
393
392
391
390
389
388
387
386
385
384
383
382
379
381
380
377
378
376
375
374
373
370
369
372
371
368367
366
365
364
363
362
359
358
357
354
356
355
353
352
351
350
349
348
347
346
345
344
340
341
337
336
339
338
333
332
331
330
329
328
326
325
327
322
321
324
323
319
320
318
317
316
315
312
314
313
309
308
311
310
307
306
304
305
301
303
302
298
297
300
299
295
294
296
291
293
292
288
290
289
285
284
287
286
281
280
283
282
278
277
279
274
273
276
275
271
272
268
267
270 269
266
265
262
264
263
258
257
261
260
259
254
253
256
255
249
248
252
251
250
247
246
245
242
241
244
243
238
237
240
239
236
235
232
234
233
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1
MARIBYRNONG RIVERSIDE DEVELOPMENT PTY LTD
RIVER VALLEY ESTATE - STAGES 7A & 7B SUNSHINE NORTH
LEVEL ONE INSPECTION & TESTING HILF DENSITY
HILF TEST LOCATION PLAN
AS SHOWN 1000780.1000-F01 1
PTO Mar.20KMJA Mar.20
1000780.1000
P:\1
00
07
80
\1
00
07
80.1
00
0\W
orking
Ma
te
ria
l\C
AD
\F
IG
\1
00
078
0.1
00
0-F
01
.d
wg
2
020
-Jun
-11
3
:4
2:2
6 P
M P
lotte
d B
y: K
AT
HR
YN
JA
CK
SO
N
CHECKED
DESIGNED
COPYRIGHT ON THIS FIGURE IS RESERVED
SCALE (A3) REVFIG No.
TITLE
PROJECT
CLIENTPROJECT No.
DRAWN
APPROVED DATE
ORIGINAL IN COLOUR
A3 SCALE 1:20000 20 40 60 80 100 (m)
LEGEND
HILF DENSITY TEST LOCATION
SHEET 1 OF 3
SHEET 2 OF 3
SHEET 3 OF 3
PERE
NNIA
L DRI
VE
RIVERVALLEY BLVD
SITE LOCATION PLANSCALE: 1:20000
AGED CARE
CHURCH
SITE LOCATION
HALONG DR
BERKSHIRE ROAD
SCALE 1:200000 200 400 600 800 1000 (m)
NOTES:1. AERIAL IMAGE SOURCED FROM NEARMAP. COPYRIGHT NEARMAP PTY LTD IMAGERY DATE: 28/04/2020.2. BASE PLAN PROVIDED BY DALTON CONSULTING ENGINEERS. FILE REFERENCE: 12050 _Stage 7A Base Plan.dwg
DATE RECEIVED: 06/05/2019.
kmja
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