Thick optical cable structure with shielding layer and damage detection method thereof

The invention discloses a thick optical cable structure with a shielding layer. The thick optical cable structure comprises a central reinforcing core and a plurality of loose tubes arranged around the periphery of the central reinforcing core. Optical fibers are arranged in the loose tubes, an inner sheath is arranged around the peripheries of the loose tubes, a water blocking ring is arranged around the periphery of the inner sheath, an outer sheath is arranged around the periphery of the water blocking ring, a first shielding layer is attached around the periphery of the outer sheath, and second shielding layers are attached between the loose tubes and the inner sheath. Because the first shielding layer and the second shielding layer are partially lost, the shielding performance is greatly weakened; the specific damage condition of the thick optical cable structure is detected by adopting the mode; and the first shielding layer is made of a conductive film to shield low-frequency electromagnetic waves and