This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
壢 combines 土 (earth) with 歷, which likely contributes the sound. The exact historical development is uncertain.
The left side is earth 土, and the right side is 歷, which suggests a passage of time. Picture an ancient earthen hole or pit that has been there through history.
For レキ, imagine a relic buried in the earth: relic -> レキ, and the old earthen hole holds it.