Offshore drilling in Tan Shui Port Project - Taiwan (on Survey Vessel)

Wiratman & Associates' Site Investigation Division has considerable experiences covering a wide range of projects, from small domestic up to through major projects all over the country and beyond.

Our concern is to provide reliable geological data and geotechnical parameters to be of value for preparing the respective recommendation and design in difficult site conditions and needs of clients.

Both factual and interpretative reports can be provided for any given project site as well as based on the size and type of development envisaged. Targets have been achieved through intense  interaction between supply and application of comprehensive devices, knowledge and professional experiences.

Site Observation, in-situ testing, monitoring, laboratory testing coupled with precise data processing and interpretation in accordance with international standards or methods are our stepwise action plan for carrying out the project during the investigation phase.

In addition, we are able to give our support during the construction phase by doing routine tests and geotechnical monitoring, soil improvement and slope protection.

Some services offered by Site Investigation Division are:

• Plate Bearing & Shear Box Test

• Pressure Meter Test

• SPT, Vane Shear & Dutch Cone Penetration Test

• Bore-hole Permeability Test

• Pumping Test

• Seismic Refraction Survey

• Geo-electrical Survey

• Soil & Rock Mechanics Laboratory Testing

• Rotary Core or Non Core Drilling

• Overburden drilling by ODEX

• Down the hole drilling

• Drilling for Ground Anchor, Deep Well & Grouting

Our project experience includes the following:

• Offshore Drilling in Tan Shui Port Project - Taiwan; Core Drilling (18 holes; 400m); Client/Owner: Somesha Geoscience - Singapore; 1999.

• Geotechnical Investigation for NW Segment Expansion Project for Gathering Station VI - Minas; Core Drilling (5 holes; 150m); Client/Owner: PT Caltex Pacific Indonesia; 1998.

• Geotechnical Investigation for Potential Casting Basin Sites in Timor; Core Drilling in West Timor (5 holes; 150m) & East Timor (16 holes; 640m ; Client/Owner: BHP Petroleum Pty. Ltd.; 1997.

• Geotechnical Investigation for Nitric Acid and Ammonium Nitrate Plant Project - Bontang; Core Drilling (14 holes; 570m), Pressure Meter Test and other related test; Client/Owner: PT Tridaya Esta Kimia; 1997.

• Geotechnical Investigation for Tanjung Jati B. Coal Fired Power Plant Project - Central Java; Core Drilling (20 holes; 797m) with Pressure Meter Test; Client/Owner: PT Cepa Indonesia; 1996.

• Geotechnical Investigation for BDNI Center Office Building; Client/Owner: PT Sentra BDNI Development; 1996.

• Preliminary Geotechnical Investigation for Jakarta Mass Rapid Transit System Project Blok M - Kota Phase-1; Core Drilling (52 holes; 2320m) with related In-situ Test; Client/Owner: Joint Working Group; 1996. 

• Geotechnical and Geological Investigation Works for Pandanduri Swangi  and Mujur Dams; Core Drilling (33 holes; 880m) with Pressure Meter Test; Client/Owner: Mott McDonald; 1995.

• Geotechnical Investigation Works for Gunung Salak Geothermal Power Plant Extension Project; Core Drilling (3 holes; 140m) and Plate Bearing Test; Client/Owner: Ansaldo - Italia; 1995.

• Geological and Geotechnical Investigation for Larona Hydroelectric Power Plant Project; Core Drilling (12 holes; 600m) and Seismic Refraction 4 Km; Client/Owner: Pacific Rim Power; 1995.

• Geotechnical Investigation Works for Infrastructures at Batu Hijau Gold Mine Project; Core Drilling (34 holes; 1360m) and Seismic Refraction 4 Km; Client/Owner: Golder Associates - Canada;1995

• Geological Survey for Hydro Potential Study of Sumatera Island; Client/Owner: Electric State Company (PLN); 1994

• Drilling and Grouting Works for Chandra Asri Petrochemical Project; 1993

• Dewatering Works for Mega Pasaraya Mall Projects; Owner/ Developer: PT Pasaraya Toserba Jaya;1993

• Pumping Test for Bonvest Hotel and Apartments Project; 2 Test wells & 10 observation wells; 1993

• Natural Condition Surveys in Ports of Kupang and Bitung for Study on Integrated Modernization Plan for Sea Transportation in Eastern Indonesia; Offshore Core Drilling (4holes; 160m) Depth of sea bed down to 15 m; Client/Owner: Directorate of Sea Communication;1993.

• Geotechnical Investigation for Lombok Tourism Development Project Putri Nyale Resort; Core Drilling (13holes; 265m) and other in-situ testing; Owner/ Developer: PT Lombok Tourism Development Corp.;1993

• Offshore Drilling for Geotechnical Investigation of Purified Telephetaric Acid Merak phase II; Offshore Core Drilling (12hole; 360m) depth of sea bed down to 15 m; Client/Owner: Bakrie - Kasei;1993

• Geotechnical Investigation for Integrated Musi Bridge Project - Musi Refinery; Core Drilling (10hole; 504m) and other in-situ testing; Client/Owner: Pertamina;1993

• Deep Well Construction for Supporting Facilities of Singkarak HEPP; Client/Owner: Dumez; 1992

• Geotechnical Investigation for Proposed Double Track Railway Cisomang - Rendeh Project; Core drilling (23 holes; 245m); Client/Owner: Perumka; 1991

• Offshore and Onshore Geological and Geotechnical Investigation Works for Paiton Steam Power Plant Project; 34 offshore drilling & 3 Onshore drilling; Client/Owner: Obayashi Corp. - Japan; 1991

• Routine Geotechnical Investigation for Subsoil Improvement Works - Balongan EXOR II Project; Plate Bearing Test, Sand Cone Test and Drilling; Client/Owner: Penta Ocean - Japan; 1991-1993

• Geotechnical Investigation for Cikampek - Padalarang Toll Road Project; Core drilling (62 holes; 1455m), Borehole In-situ Testing, Plate Bearing Test; Client/Owner: Rendel Palmer & Tritton; 1990

• Underground Geotechnical Investigation for Lot D1 Investigation Adit of Singkarak HEPP; Core drilling in Adit (12 holes; 547m), Convergence Measurement (6 nos), X-hole & Down Hole Seismic Survey, Flow Measurement; Client/Owner: Electric State Company (PLN); 1990

• Geotechnical Investigation for Bukit Asam Telecommunication Towers Project; Core drilling (19 holes; 325m) Pressure Meter Test, Vane shear Test and Lab. Test; Client/Owner: Golder Associates; 1986

• Geological and Geotechnical Investigation Works for Detail Design Stage of Mrica HEPP; Trial Embankments, Grouting Test, Core drilling and Pressure Meter Test; Client/Owner: SWECO - Swedia; 1984

• Offshore and Onshore Geological and Geotechnical Investigation Works for Paiton Steam Power Plant; Core drilling (18 holes; 830m) with max. depth 80m, coupled with borehole in-site testing such as Pressure Meter Test, Vane Shear Test and Lab. Test; Client/Owner: Electric State Company (PLN); 1984