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Standardizing Subsurface Utility Engineering (Detection & Mapping of Existing Utilities)

Standardizing Subsurface Utility Engineering (Detection & Mapping of Existing Utilities) Dr. Sanjay Rana, Director, PARSAN Overseas Pvt. Ltd. New Delhi, India, sanjay@parsan.biz   Abstract Various utility installation projects involve execution using a mix of cable laying technologies like HDD (Horizontal Directional Drilling), MT (Micro-Trenching) and open trenching. Infrastructure projects also require accurate information on underground utilities in planning and construction stages. To be able to avoid damages to existing utilities, especially in Indian cities with extreme subsurface utilities congestion, record creation of existing subsurface utilities is the first step. Well ...

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Geo-electrical Real-time Ground Prediction While TBM-Boring

Geo-electrical Real-time Ground Prediction While TBM-Boring Dr. Sanjay Rana, Director, PARSAN sanjay@parsan.biz     Abstract The Bore Tunnelling Electrical Ahead Monitoring (BEAM) system, developed by the GET Company, Germany, is a geophysical ground prediction technique especially designed for TBM operations. BEAM is a non-intrusive focused-electrical induced polarization ground prediction technique, permanently operating while TBM advances. The intent is to get a continuous real-time geological forecast ahead of TBMs, useful to predict the quality of the groundmass and the presence of large quantities of water. The system has proven to be very reliable in providing an accurate...

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Geophysical Investigations To Deal With Uncertainties in Difficult Ground Conditions

GEOPHYSICAL INVESTIGATIONS TO DEAL WITH UNCERTAINTIES IN DIFFICULT GROUND CONDITIONS Dr. Sanjay Rana Director, PARSAN Overseas Pvt. Ltd., New Delhi, India   Abstract   For planning and development of any major civil project adequate knowledge of geotechnical conditions at site is important. If not adequately investigated, geological 'surprises' can lead to failures and accidents during execution. Engineering geophysics is an efficient means of subsurface investigation. The continuous information provided by geophysical methods, as against discrete point information provided by conventional means like drilling, makes project execution safer & faster. Technological advancements an...

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Advancement in Geophysical Investigations for Tunnels

Advancement in Geophysical Investigations for Tunnels Dr. Sanjay Rana, Director, PARSAN Overseas (P) Limited, India sanjay@parsan.biz   ABSTRACT: Modern major construction is inconceivable without high-level engineering explorations, which play a major role in increasing the economic efficiency of capital investments. For the design of structures it is indispensable to procure comprehensive high-quality information about the subsurface, within very short periods. The study of diverse natural conditions predetermines a variety of methods and technical means which can be used for carrying out exploratory work. Most of the time, while working on tunnels, caverns and oth...

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NON-DESTRUCTIVE TECHNIQUES FOR INSPECTING DAMS (CONCRETE, MASONRY, EARTHEN) AND SPILLWAYS

NON-DESTRUCTIVE TECHNIQUES FOR INSPECTING DAMS (CONCRETE, MASONRY, EARTHEN) AND SPILLWAYSDR. SANJAY RANADirector, PARSAN Overseas Pvt. Ltd., New Delhisanjay@parsan.biz  1.  Introduction   As large dams age, it becomes increasingly important to determine the condition of their material and to track changes in this condition over time. Inspections of concrete, masonry and earthen dams, dikes and spillways often require testing to evaluate for leakage paths, soil settlement/voiding, or weakened deteriorated concrete/ masonry.  NDT uses geophysical testing methods (ground penetrating radar, 2D/ 3D electrical resistivity imaging, streaming potential) to identify potential leakage paths under earthen dams, dik...

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