If you can't read please download the document
View
214
Download
2
Embed Size (px)
47
APPENDIX A MAIN SITE INVESTIGATION REPORT
01/12/2015
Unit 12, Owenacurra Business Park, Midleton, Co. Cork T +353 21 4631600 F +353 21 4638690 E geotechnical@priority.ie
Engineer: Tobin Consulting Engineers,
Fairgreen House,
Fairgreen Road,
Galway,
Ireland.
Client: Irish Water,
Colvill House,
24-26 Talbot Street,
Dublin 1
Ireland.
GLENAMADDY SEWERAGE SCHEME, CONTRACT NO.1
SITE INVESTIGATION CONTRACT
FACTUAL REPORT
NO. P14100
mailto:geotechnical@priority.ie
REPORT CONTROL SHEET
Employer Irish Water
Employers Representative
Tobin Consulting Engineers
Project Name Glenamaddy Sewerage Scheme, Contract 1 Site Investigation
Report Name
Glenamaddy Sewerage Scheme, Contract 1 - Site Investigation Contract Factual Report
Project Number P14100
This Report Comprises of
RCS TOC Text No. of
Appendices Drawings
Electronic data
1 1 20 4 4 *.pdf
Revision Status Author(s) Approved By Issue Date
D01 Draft JMH GH 13.03.2015
F01 Final
01.12.2015
P14100_RP_F01 i 01/12/2015
TABLE OF CONTENTS
1 INTRODUCTION .........................................................................................................................2
1.1 SCOPE OF WORKS ...................................................................................................................2
1.2 REPORTING.............................................................................................................................3
1.3 SITE LOCATION & DESCRIPTION .................................................................................................4
1.4 PUBLISHED GEOLOGY ..............................................................................................................4
1.4.1 Solid ..............................................................................................................................4
1.4.2 Superficial deposits ........................................................................................................4
2 FIELDWORK ...............................................................................................................................5
2.1 GENERAL ................................................................................................................................5
2.2 EXPLORATORY HOLES ..............................................................................................................6
2.3 SAMPLING ...............................................................................................................................7
2.4 GROUNDWATER MONITORING ...................................................................................................8
2.5 IN SITU TESTING ......................................................................................................................9
3 LABORATORY TESTING ......................................................................................................... 13
3.1 SOIL ..................................................................................................................................... 13
3.2 ROCK ................................................................................................................................. 14
3.3 SURFACE WATER ............................................................................................................. 14
4 GROUND CONDITIONS ............................................................................................................ 16
4.1 SUPERFICIAL DEPOSITS .......................................................................................................... 16
4.2 BEDROCK DEPOSITS .............................................................................................................. 17
4.3 GROUNDWATER ..................................................................................................................... 18
5 SUMMARY ................................................................................................................................ 20
APPENDICES
APPENDIX A EXPLORATORY HOLE AND PHOTOGRAPHIC RECORDS
APPENDIX B LABORATORY RESULTS
APPENDIX C ARCHAEOLOGICAL MONITORING REPORT
APPENDIX D EXPLORATION LOCATION PLANS
P14100_RP_F01 2 01/12/2015
1 INTRODUCTION
1.1 SCOPE OF WORKS
In May 2014, Tobin Consulting Engineers (Tobin) acting as the Employers Representative
and on behalf of their Client, Galway County Council commissioned Priority Geotechnical
(PGL), to carry out a site investigation contract at the locations of proposed works for
Glenamaddy Sewerage Scheme.
The purpose of the investigation is to provide design information for the provision of sewer
network (Creggs Road, Kilkerrin Road and Rising Main to WwTP) pumping stations (Main
Street and Kilkerrin Road), wastewater treatment plant and an integrated constructed
wetland system. The scope of the ground investigation, which was specified by Tobin, as
Tendered comprised the following:
19 No. trial pits excavations to a depth 1.5m;
15 No. slit trenches excavations to a depth 1.5m;
41 No. cable percussive to a depth 3.0m;
16 No. rotary boreholes to a depth 10.0m;
All associated sampling and In situ testing of soil and groundwater;
Surface water sampling and testing of streams in the area;
Laboratory testing of soil and rock;
Preparation and presentation of detailed factual reports and drawings as per IS EN
1997 (Eurocode 7) the specification and the Scope the Works and
Reinstatement of all exploratory holes.
The final works as completed are detailed in Section 3.2 of this factual report.
This investigation was carried out in accordance with the contract specification: Specification
and Related Documents for Ground Investigation in Ireland (Engineers Ireland, October
2006), Eurocode 7- Geotechnical Design Part 2, ground investigation and testing (BS EN
1997-2: 2007) and the relevant British Standards (BS 5930:1999 +A2:2010 and BS 1377,
Parts 1 to 9). The fieldworks were carried out between 20th October and 04th February, 2014.
Additional trial pitting and one rotary borehole were subsequently scheduled. The additional
fieldworks were undertaken between the 5th and 6th October, 2015.
P14100_RP_F01 3 01/12/2015
1.2 REPORTING
This geotechnical data report (ref: P14100_RP_F01) presents the factual records of the
fieldwork with respect to the site investigation works contract for the proposed Glenamaddy
Sewerage Scheme.
An archaeological report titled Glenamaddy Sewerage Scheme, Co. Galway, Archaeological
Monitoring of Site Investigations was prepared by Dominic Delaney and Associates which
details the archaeological monitoring undertaken during the direct investigations fieldworks.
This report is presented in APPENDIX C of this factual report.
No responsibility can be held by PGL for ground conditions between exploratory locations. The
exploratory logs provide for ground profiles and configuration of strata relevant to the investigation
depths achieved during the fieldworks. Caution shall be taken when extrapolating between such
exploratory locations. No liability is accepted for ground conditions extraneous to the exploratory
locations.
No account has been taken of potential subsidence or ground movement due to mineral extraction,
mining works or karstification below or in proximity to the site, unless specifically addressed.
This report has been prepared for Ervia, Irish Water and TOBIN. The information should not be used
without their prior written permission. PGL accepts no responsibility or liability for this document being
used other than for the purposes for which it was intended.
P14100_RP_F01 4 01/12/2015
1.3 SITE LOCATION & DESCRIPTION
The site consists of work for the investigation of proposed sewer networks and pumping
stations being mainly on public roads and some in urban residential environments. The
works relating to the site investigation for the waste water treatment plant and the integrated
constructed wetland system are mainly on agricultural land.
1.4 PUBLISHED GEOLOGY
1.4.1 Solid
The Geological Survey of Ireland, 1:100,000 mapping (Sheets) were reviewed and the solid
geology was Visean Limestone (VIS) and is described as undifferentiated Limestones. To the
northwest of the proposed wastewater treatment plant and integrated constructed wetland
system the bedrock is the Ballysteen Formation (BA) described as dark muddy Limestone
and Shale. The two geological formations VIS/ BA are delineated by a fault feature and so
bedrock in the area is expected to be variable. A search of the GSI karst data base identified
numerous features; swallow holes, turloughs and enclosed depressions in the area.