A STUDY ON LIQUEFACTION POTENTIAL OF COXS BAZAR CITY AREA, BANGLADESH
The historical seismicity data of Bangladesh and adjoining area indicate that Bangladesh is vulnerable for medium to large earthquakes. As Bangladesh is the worlds most densely populated area, any future earthquake shall affect more people per unit area than any other seismically active regions of the world. Earthquake ground motion generating pressures inside the loose sand deposit saturated with water can induce liquefaction. Coxs Bazar, one of the main tourist sea-beach cities of Bangladesh and situated on the bank of the Bay of Bengal, mainly comprised of soils with saturated sand-deposits in flood plains and sea shore areas with shallow water table may liquefy during a strong earthquake. In this study, geological and geotechnical characterization and assessment of Soil Liquefaction of Coxs Bazar city was performed to assess the ground susceptibility to expected earthquake in this area. Seed and Idris simplified procedure was used for the analysis of liquefaction potential at different depths using Standard Penetration Test (SPT) data of 32 boreholes. Soil liquefaction potential was evaluated for an expected earthquake of magnitude 7 in Richter scale (RS). Liquefaction potential of a location was estimated by taking the weighted average of liquefaction potentials at different depths of soil deposit. Finally, a microzonation map of soil liquefaction potential of Coxs Bazar city area was prepared. From this study, it has been found that most of the city area of Coxs Bazar is susceptible to soil liquefaction for an expected earthquake magnitude of 7 in RS, shows a pointer towards the expected vulnerability of existing building stocks, which have been used for tourism business. The liquefaction potential map developed will be useful for Engineers, Builders, Architects and Policy Makers as a general guideline to ground-failure susceptibility for effective land use and town planning especially for the development of safe tourism industry and also for disaster mitigation.
earthquake SPT Cozs Bazar ground susceptibility liquefaction potential map
Abdur Rouf M. Jahangir Alam Pradip Nath Muhammad Tarequl Alam Asiful Haque A. R. Bhuiyan
Department of Environmental Science and Civil Engineering, Saitama University, Japan Dept. of Civil Engineering, Chittagong Univ. of Engineering & Technology, Bangladesh
国际会议
广州
英文
1512-1517
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）