Finally found a remedy by exporting via Data => From Text option the above issue can be tackled..
Below is code for the same..
 Do While fname <> ""
Workbooks.Add
Set wBook = ActiveWorkbook
Set wksht = ActiveSheet
   With wksht.QueryTables.Add(Connection:="TEXT;" & folder_name & fname, Destination:=Range("$A$1"))
    .Name = fname
    .FieldNames = True
    .RowNumbers = False
    .FillAdjacentFormulas = False
    .PreserveFormatting = True
    .RefreshOnFileOpen = False
    .RefreshStyle = xlInsertDeleteCells
    .SavePassword = False
    .SaveData = True
    .AdjustColumnWidth = True
    .RefreshPeriod = 0
    .TextFilePromptOnRefresh = False
    .TextFilePlatform = 65001
    .TextFileStartRow = 1
    .TextFileParseType = xlDelimited
    .TextFileTextQualifier = xlTextQualifierNone
    .TextFileConsecutiveDelimiter = False
    .TextFileTabDelimiter = True
    .TextFileSemicolonDelimiter = False
    .TextFileCommaDelimiter = False
    .TextFileSpaceDelimiter = False
    .TextFileColumnDataTypes = Array(1, 1, 1, 1, 1, 1, 1, 1, 1)
    .TextFileTrailingMinusNumbers = True
    .Refresh BackgroundQuery:=False
End With