Trial juries shall be selected as provided in Code Sections 15-12-40 and 15-12-42. At the same time and in the same manner that grand juries are drawn, the judge of the superior court shall draw names to serve as trial jurors for the trial of civil and criminal cases in the court. Such trial jurors shall be summoned in the same manner as is provided in Code Section 15-12-65 for summoning grand jurors.