Patent ID: 8720792

Claim:
A ballast retaining structure used for a bedded track provided with a track bed formed by laying ballast on a roadbed, performing tamping to form a bed-like structure having a predetermined cross-sectional shape such as a trapezoid, and extending the bed-like structure in an extending direction of the roadbed; a plurality of sleepers disposed on the track bed such that longitudinal directions of the sleepers are perpendicular to an extending direction of the track bed; and one or more pairs of rails fastened to upper surfaces of the plurality of sleepers in the extending direction of the track bed, the ballast retaining structure being provided on both sides in a transverse direction of the track bed and in the extending direction of the track bed to thereby retain the track bed from the transverse direction thereof, the ballast retaining structure comprising: a layered body extended in the extending direction of the roadbed and formed by stacking a plurality of bag-like objects, each being formed in a bag shape and containing the ballast and a plurality of communication holes for communicating an inside and an outside thereof formed in at least upper and lower surfaces of the bag-like object, from a toe of slope to a top of slope of the track bed such that each of the bag-like objects is tilted to decline from an outer end portion to an inner end portion thereof; and a burial member including a bar-like member having a bar shape, the bar-like member being inserted through mutually opposing communication holes among the communication holes of at least two uppermost bag-like objects among the stacked bag-like objects and having an end portion to be buried into the roadbed.