SM Ariful Ahsan

Main Job Responsibilities: Structural and Foundation design of substation building: Super structure and foundations of 14 nos. 132/33kV Gas Insulated Switchgear (GIS) buildings (6 to 20 storied buildings) in various locations of Dhaka City were designed & implemented under me. Analysis of soil tests before construction, supervision of pile load tests and pile strength (cylinder/cube) tests of single and group piles during construction were made and quality controls were maintained throughout project periods.  Structural and Foundation design of transmission towers: Structural design and foundations of Overhead Towers (River Crossing, Terminal and Anchor) and transmission monopoles (tension and suspension type) were designed & supervised by me. I have conducted settlement analysis for foundations of river crossing towers with erosion protected designs. Also determined proper anchorage for pole foundations against overturning moment failure.  Subsurface investigation: I have directed and monitored the subsurface investigations for installation of 132kV (kilovolts) and 33kV high voltage XLPE (Cross Linked Polymer) underground cable maintaining proper quality. Design and supervision of underground power cable trench from source power house to feeder substations were done by me where soil surcharge and retaining pressures were massive. I contributed in overcoming obstacles of right of way for underground cable installations (44 km long) against other utility underground lines (gas, water etc.). Calculation of load for HDPE (High density poly ethylene) pipe laying in open cut and HDD (Horizontal Drive drilling) methods for cable laying in VVIP roads were done under my supervision.

Major Responsibilities: #Designed Tower & Pole (Telecommunication) and other structures with their foundations. # Gained extensive knowledge and professional experience on different codes and standards (BNBC, BS, ACI, EIA/TIA-222 F and G, AISC, ASCE, ASTM). #Professional knowledge over space trusses, steel strengths and grades, failure mechanisms etc. #Had managed and worked for the clients Grameenphone, Robi, Airtel, Banglalink. #Managed deals with foreign Clients include Ericson, Irrawaddy Green Towers, Zain Telecommunications etc. #Lead the Professional dealings with Countries include Myanmar, Nepal, SriLanka, Malaysia, Kuwait, Cambodia etc.

Courses taught: CE 332: Soil Mechanics Lab CE 311: Design of Concrete Structures I CE 211: Mechanics of Solids I CE 203: Engineering Geology and Geomorphology CE 207: Advanced Engineering Materials

Relevant Courses: (i) Environmental Engineering (ii) Geotechnical Engineering (iii) Water Resource Engineering (Irrigation & Flood Control, Hydrology, Open Channel Flow ) (iv) Transport Engineering (Transport & Traffic Design, Highway design & railways, ) (v) Structural Engineering (Design of steel structure, Structural Design & Analysis, Design of Concrete structure)