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Services

 GEOTECHNICAL INVESTIGATION

Development projects in Southern side of India normally require the production of maps and plans to be carried out simultaneously with the investigation of sub-surface geophysical conditions, so that planning and design work can be performed using integrated geographical and geophysical data.

Global Projects Geo-Survey Investigation have experienced teams for execution of taking over projects involving survey and geotechnical investigation, where close liaison between the teams carrying out the different aspects of the work is essential, and where skilled management of all activities is required to meet time and cost constraints. The company uses both its own resources and the services of local specialist companies in other disciplines to carry out projects involving survey and mapping and geotechnical investigation and laboratory testing.

With the coordination of experienced teams with rigs Global projects had ability to perform the Mechanical Drilling and Percussion Drilling with augers.
Global Projects has recognizable with Penetration Tests:

  • Standard Penetration Tests (SPT) will be carried out at intervals as specified, and disturbed samples will be obtained for determining the soil stratigraphy. The SPT samplers will be driven using a 140lb (63.5kg) automatic hammer falling freely through a vertical height of 30 inches (760mm). For each borehole, a visual classification of the soil encountered will be recorded on the borehole log.
  • Dynamic Core cum Cone Penetration test (DCPT),
  • Static Cone Penetration test (CPT) and
  • Plate load Testing.

Global Projects Geo-Survey Investigation can deploy up to 3 rotary drilling rigs for use in the geotechnical investigations conducted: the smaller rigs are able to drill boreholes to 25m in depth, whilst the heavy rigs can reach depths of 50m or greater, depending on the sub-surface structure. Global Projects has deployed the rigs both on land and in the shallow waters off the coastal areas of Tamilnadu, mounting the rig on a jack-up barge for the latter application. The rigs are equipped with a full range of fittings for rotary drilling and coring, including SPT split samplers, Shelby Tube samplers for cohesive soils, and thick-walled Dames & Moore samplers for denser materials. The Operators are all skilled, trained operatives with many years of experience on the rigs in Tamilnadu.

Global Projects carries out drilling and sampling in the field using equipment of most suited to the tasks to be performed. Drilling rigs utilized include:

Calyx drilling rig mounted on a two-wheel-drive: universal rotary drilling with direct circulation of mud/water.

 LABORATORY TESTING

Global Projects Geo-Survey Investigation and its Associate operate laboratories in Madurai and other districts of Tamilnadu, with the in charge under Science and Technology Division of Global Projects and the head controlling the operation.

The laboratory is accredited by the apex bodies, and is fully staffed with 5 laboratory technicians working cum Graduate Trainees for both in the field and in the laboratory, and is equipped to carry out testing to determine the physical characteristics of the samples obtained during the field sampling.

Tests most commonly undertaken as below:

  • Moisture Content
  • Particle Size Distribution and Hydrometer Analysis
  • Atterberg Limit Test for the determination of liquid and plastic limits
  • Bulk and Dry Weight/Density Test
  • Specific Gravity Test
  • Triaxial Unconsolidated & Undrained Test
  • Direct Shear Test

 GEOPHYSICAL INVESTIGATION

Global Projects Geo-Survey Investigation have more than 10 years experienced teams for execution of taking over projects involving the following Geophysical services :

  • Electrical Resistivity Tests,
  • soil resistivity and seismic studies
  • Detection of underground utilities by pipeline locator
  • Soil stratification along the alignment and sampling
  • Laboratory tests, generation of subsoil stratification profile
  • Corrosion and Aggressivity Survey for cross country pipelines
  • Corrosion of concrete structures in marine environment

In Situ Field Testing

In-situ tests can be performed by the Technicians from Global Projects as part of a program of drilling and field testing :

  • Density and Unit Weight of Soil in place using the Sand-Cone Method(Field Density Test)
  • Thermal Resistivity of soils
  • Field CBR Test
  • Cone Penetration Testing
  • Plate Load Testing
  • Installation of Bench marks/Protection post
  • Crushing Strength Impact Testing

 TOPOGRAPHIC SURVEY

Topographic Surveys are required prior to the construction of any industrial facility, commercial building, transportation corridor, utility network, or housing development. All existing features in the area, both visible above ground, and hidden underground, are required to be measured and plotted accurately on maps and plans which will be related to a projection or grid.

Global Projects Geo-Survey Investigation have been engaging in the production of topographic surveys for a range of clients. The company employs qualified and experienced Surveyors and Survey Assistants using both GPS satellite receivers and Survey Total Stations to collect the data required. Because of the different map projections in use in India, the selection of the correct projection is most important, and Global projects can advise clients on the most suitable projection and scale to use, depending on the purpose for which the map is to be used.

 BATHYMETRIC SURVEY

With the rapid development of the offshore potential of Southern side of India, bathymetric surveying is increasingly in demand. Global Projects Geo-Survey Investigation has the resources to respond to this demand, being able to deploy single-beam and multi-beam echo-sounders from a variety of platforms, from inflatable ribs to river-going vessels, for bathymetric surveys of both inshore and deeper waters.

Equipment, including DGPS instrumentation, side scan sonar, sub-bottom profilers, magnetometers, CTD units, and offshore and onshore weather stations, can also be deployed in support of the performing of bathymetric studies.

 BOREWELL DRILLING & SERVICES

Global Projects Geo-Survey investigation have more than 5 years experienced teams for execution of taking over projects involving the following services :

  • WATER DEVINING & GEOLOGICAL INVESTIGATION
  • BORE WELL DRILLING
  • TUBE WELL DRILLING
  • HAND BORE & FILTER POINT WELL DRILLING
  • TEST BORE HOLE DRILLING
  • BORE WELL FLUSHING
  • ROTARY PILING
  • PUMP TEST
  • DIAMOND DRILLING
  • SUPPLY, ERECTION & SERVICE OF PUMPS
  • SUPPLY & ERECTION OF WATER FILTERS

DRILLING METHODOLOGY

Our method is :
Drilling and sampling will be performed in the field using equipment most suited to the tasks to be performed. Drilling rigs utilized by the company include:

  • Calyx drilling rig mounted on a two-wheel-drive: universal for allhydraulic drill suitable for auger boring or rotary drilling with or without casing, with direct circulation of mud/water.
To carry out the work, each drilling rig will have the following personnel in attendance:
  • Geotechnical Engineer
  • 1 x Rig Operator
  • 1 x Assistant Rig Operator
  • 1 x Technician
Other equipment to be deployed will include:
  • Flight augers
  • Double tube core barrels
  • SPT samplers
  • Shelby Tube samplers
  • Casing pipes
  • PVC sheeting for the wrapping of core samples
Drilling will be carried out in accordance with IS - 2131 : 1981, 3.1 Procedures for, using either auger boring, or, if necessary because of subsurface soil conditions, rotary wash boring techniques with or without bentonite mud flush.