csplit regex with pipe (|)

i want to split file by regular expression, i have file format as below 0|t| lorem ... some text 138|t| title some text if i execute egrep "[0-9]+\|t\|" file | wc -l it counts occurrence correctly but if i execute csplit filename /[0-9]+\|t\|/ then it says no match found and does not split file. seems some issue with pipe in pattern but not able to figure out solution.