Siwadol  Dejphumee <br/><br/>
Liquefaction assessment :  a case of Mae Lao district, Chiangrai Thailand 

 - Pathum Thani, Thailand :  Asian Institute of Technology,  2017 
 - 158 leaves :  ill. (some col.) +  1 online resource 
 - Thesis ;  no. GE-16-07 .
 - Asian Institute of Technology.  Thesis ;  no. GE-16-07 .
<br/><br/> A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Earth Resources Engineering, School of Engineering and Technology 
<br/><br/>Thesis (M.Eng.) - Asian Institute of Technology, 2017 
<br/><br/> Liquefaction  is  one  cause  of  damages  to  structures  in  the  2014  Chiang  Rai  earthquake  in Thailand, the liquefaction occurred scatteredly in the Quaternary sediment area in Mae Lao district where there were some damages to shallow foundation. The purpose of this study is to do liquefaction assessment in Mae Lao district area. Basic soil properties of subsoils are obtained from 15 boreholes. The liquefaction susceptibility analysis shows that the soils are susceptible to liquefaction. Furthermore, a prediction of severity of liquefaction was assessed based on the characteristic of Phayao fault. The level of severity of liquefaction is judged using the liquefaction potential index (LPI). The result shows that the level of severity and area affected by liquefaction increases with an increase in size of earthquake. In addition, a liquefaction probabilistic assessment is made considering fluctuation of ground water level and  potential  earthquakes from  all  active  faults  in  proximity  of  Mae  Lao  district.  The assessment indicates that shallow footings with size larger more than 1 m will be safe from liquefaction.  Finally,  maps  of  annual  probability  of  liquefaction  and  failure  of  shallow footing of Mae Lao district were produced.   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Liquefaction<br/>Earthquakes--Thailand--Chiang Rai<br/>Engineering geology--Thailand--Chiang Rai