Canon Law (Can. 1061 §1.) Tells us that a marriage is ratified and consummated; if the spouses have performed between themselves in a human fashion a conjugal act which is suitable in itself for the procreation of offspring, to which marriage is ordered by its nature and by which the spouses become one flesh.
§2. After a marriage has been celebrated, if the spouses have lived together consummation is presumed until the contrary is proven.
Catholics can be validly married and not have intercourse.
For a just cause, the pope can dissolve a non-consummated marriage between Catholics at the request of both parties or of one of them, even if the other party is unwilling.
A marriage that is valid and consummated cannot be dissolved by any human power and by no cause, except death.