This is the 8528th most frequent Japanese word.
押しかけ
"押しかけ" means "to barge in" or "to show up uninvited."
In this sentence, '押しかけた' conveys the idea of showing up somewhere, often unexpectedly or without an invitation.
彼らはパーティーに押しかけた。
They showed up at the party uninvited.
Here, '押しかける' implies insisting or imposing oneself into an event or activity, such as joining a trip without considerate invitation.
また旅行に押しかけるつもりですか。
Are you planning to push your way into the trip again?
'押しかけた' in this context describes an overwhelming approach towards a place, often in a large number or intense manner.