{
  "model": "tunnel_skeleton.glb",
  "scope": "4745~5480 (4+745~5+480)",
  "units": "m",
  "origin_plan_xy": [
    151090.911,
    483688.46
  ],
  "sources": {
    "centreline": "C0060302-001 CA-ALGN-STSM (side-tick midpoint)",
    "road_grade_B": "C0060302-002 CR-TABL-TEX2 (계획고=노면)",
    "GL_A": "C0060302-002 CR-TABL-TEX2 (지반고)",
    "section": "C0060303-001 CS-TABL-TEX1/2, CS-CONC-MAJR, CS-EXCV"
  },
  "approximations": [
    "walls vertical down to road; invert not modelled",
    "lining band thickness at walls is radial-consistent but not as-built",
    "centreline and grade linearly interpolated between nodes",
    "superelevation sign convention assumed (z += S/100 * x, x = left of tangent)"
  ],
  "layers": [
    "lining_outer_R7282",
    "lining_inner_R6982",
    "excavation_R7402",
    "road_surface_계획고",
    "ground_GL_지반고"
  ],
  "ring_step_m": 1.0,
  "ring_points": 43,
  "first_station": 4745,
  "pattern_status": "PLACEHOLDER: 2 m 임의 배정. 실제 측점 구간 아님 (사용자 결정 2026-10-21). data/pattern_zones_placeholder.csv 를 수정 후 재빌드",
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      "pattern": "NP-5AE-1-WL-4"
    },
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      "from": 5111,
      "to": 5113,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5113,
      "to": 5115,
      "pattern": "NP-6A"
    },
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      "from": 5115,
      "to": 5117,
      "pattern": "NP-6B"
    },
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      "from": 5117,
      "to": 5119,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5119,
      "to": 5121,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5121,
      "to": 5123,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5123,
      "to": 5125,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5125,
      "to": 5127,
      "pattern": "NP-6A"
    },
    {
      "from": 5127,
      "to": 5129,
      "pattern": "NP-6B"
    },
    {
      "from": 5129,
      "to": 5131,
      "pattern": "NP-4AD-1-D-2"
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      "from": 5131,
      "to": 5133,
      "pattern": "NP-4BD-1-D-2"
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      "from": 5133,
      "to": 5135,
      "pattern": "NP-5AE-1-WL-4"
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      "from": 5135,
      "to": 5137,
      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-6B"
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      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-6A"
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      "pattern": "NP-6B"
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      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "from": 5163,
      "to": 5165,
      "pattern": "NP-6B"
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      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-6B"
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      "to": 5179,
      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "to": 5185,
      "pattern": "NP-5BE-1-WL-4"
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      "to": 5187,
      "pattern": "NP-6A"
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      "to": 5189,
      "pattern": "NP-6B"
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      "to": 5191,
      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "to": 5201,
      "pattern": "NP-6B"
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      "to": 5203,
      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "to": 5209,
      "pattern": "NP-5BE-1-WL-4"
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      "to": 5211,
      "pattern": "NP-6A"
    },
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      "to": 5213,
      "pattern": "NP-6B"
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      "to": 5215,
      "pattern": "NP-4AD-1-D-2"
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      "to": 5217,
      "pattern": "NP-4BD-1-D-2"
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      "to": 5219,
      "pattern": "NP-5AE-1-WL-4"
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      "to": 5221,
      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "to": 5225,
      "pattern": "NP-6B"
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      "to": 5227,
      "pattern": "NP-4AD-1-D-2"
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      "to": 5229,
      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "to": 5235,
      "pattern": "NP-6A"
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      "to": 5237,
      "pattern": "NP-6B"
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      "to": 5239,
      "pattern": "NP-4AD-1-D-2"
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      "to": 5241,
      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-6B"
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      "to": 5287,
      "pattern": "NP-4AD-1-D-2"
    },
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      "from": 5287,
      "to": 5289,
      "pattern": "NP-4BD-1-D-2"
    },
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      "from": 5289,
      "to": 5291,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5291,
      "to": 5293,
      "pattern": "NP-5BE-1-WL-4"
    },
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      "from": 5293,
      "to": 5295,
      "pattern": "NP-6A"
    },
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      "from": 5295,
      "to": 5297,
      "pattern": "NP-6B"
    },
    {
      "from": 5297,
      "to": 5299,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5299,
      "to": 5301,
      "pattern": "NP-4BD-1-D-2"
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      "to": 5303,
      "pattern": "NP-5AE-1-WL-4"
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      "to": 5305,
      "pattern": "NP-5BE-1-WL-4"
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      "to": 5307,
      "pattern": "NP-6A"
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      "to": 5309,
      "pattern": "NP-6B"
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      "pattern": "NP-4AD-1-D-2"
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      "to": 5313,
      "pattern": "NP-4BD-1-D-2"
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      "to": 5315,
      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "to": 5327,
      "pattern": "NP-5AE-1-WL-4"
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      "pattern": "NP-5BE-1-WL-4"
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      "pattern": "NP-6A"
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      "pattern": "NP-4AD-1-D-2"
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      "to": 5337,
      "pattern": "NP-4BD-1-D-2"
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      "to": 5339,
      "pattern": "NP-5AE-1-WL-4"
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      "to": 5341,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
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      "to": 5343,
      "pattern": "NP-6A"
    },
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      "to": 5345,
      "pattern": "NP-6B"
    },
    {
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      "to": 5347,
      "pattern": "NP-4AD-1-D-2"
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    {
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      "to": 5349,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5349,
      "to": 5351,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
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      "to": 5353,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5353,
      "to": 5355,
      "pattern": "NP-6A"
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      "to": 5357,
      "pattern": "NP-6B"
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      "to": 5359,
      "pattern": "NP-4AD-1-D-2"
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      "to": 5361,
      "pattern": "NP-4BD-1-D-2"
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      "from": 5361,
      "to": 5363,
      "pattern": "NP-5AE-1-WL-4"
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      "to": 5365,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
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      "to": 5367,
      "pattern": "NP-6A"
    },
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      "from": 5367,
      "to": 5369,
      "pattern": "NP-6B"
    },
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      "to": 5371,
      "pattern": "NP-4AD-1-D-2"
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      "pattern": "NP-4BD-1-D-2"
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      "to": 5375,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
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      "to": 5377,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
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      "to": 5379,
      "pattern": "NP-6A"
    },
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      "to": 5381,
      "pattern": "NP-6B"
    },
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      "to": 5383,
      "pattern": "NP-4AD-1-D-2"
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      "to": 5385,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5385,
      "to": 5387,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5387,
      "to": 5389,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5389,
      "to": 5391,
      "pattern": "NP-6A"
    },
    {
      "from": 5391,
      "to": 5393,
      "pattern": "NP-6B"
    },
    {
      "from": 5393,
      "to": 5395,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5395,
      "to": 5397,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5397,
      "to": 5399,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5399,
      "to": 5401,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5401,
      "to": 5403,
      "pattern": "NP-6A"
    },
    {
      "from": 5403,
      "to": 5405,
      "pattern": "NP-6B"
    },
    {
      "from": 5405,
      "to": 5407,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5407,
      "to": 5409,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5409,
      "to": 5411,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5411,
      "to": 5413,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5413,
      "to": 5415,
      "pattern": "NP-6A"
    },
    {
      "from": 5415,
      "to": 5417,
      "pattern": "NP-6B"
    },
    {
      "from": 5417,
      "to": 5419,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5419,
      "to": 5421,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5421,
      "to": 5423,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5423,
      "to": 5425,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5425,
      "to": 5427,
      "pattern": "NP-6A"
    },
    {
      "from": 5427,
      "to": 5429,
      "pattern": "NP-6B"
    },
    {
      "from": 5429,
      "to": 5431,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5431,
      "to": 5433,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5433,
      "to": 5435,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5435,
      "to": 5437,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5437,
      "to": 5439,
      "pattern": "NP-6A"
    },
    {
      "from": 5439,
      "to": 5441,
      "pattern": "NP-6B"
    },
    {
      "from": 5441,
      "to": 5443,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5443,
      "to": 5445,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5445,
      "to": 5447,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5447,
      "to": 5449,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5449,
      "to": 5451,
      "pattern": "NP-6A"
    },
    {
      "from": 5451,
      "to": 5453,
      "pattern": "NP-6B"
    },
    {
      "from": 5453,
      "to": 5455,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5455,
      "to": 5457,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5457,
      "to": 5459,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5459,
      "to": 5461,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5461,
      "to": 5463,
      "pattern": "NP-6A"
    },
    {
      "from": 5463,
      "to": 5465,
      "pattern": "NP-6B"
    },
    {
      "from": 5465,
      "to": 5467,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5467,
      "to": 5469,
      "pattern": "NP-4BD-1-D-2"
    },
    {
      "from": 5469,
      "to": 5471,
      "pattern": "NP-5AE-1-WL-4"
    },
    {
      "from": 5471,
      "to": 5473,
      "pattern": "NP-5BE-1-WL-4"
    },
    {
      "from": 5473,
      "to": 5475,
      "pattern": "NP-6A"
    },
    {
      "from": 5475,
      "to": 5477,
      "pattern": "NP-6B"
    },
    {
      "from": 5477,
      "to": 5479,
      "pattern": "NP-4AD-1-D-2"
    },
    {
      "from": 5479,
      "to": 5480,
      "pattern": "NP-4BD-1-D-2"
    }
  ],
  "open": [
    "4+700~4+745 and 5+480~5+500 excluded ([미확정])",
    "pattern zones (03-003~008) pending Task 5",
    "lining reference recorded (meta.lining_reference, 04-004~009); sheet-to-station mapping [미확정]",
    "[CONFLICT DETECTED] lining sheets print R1=6.892 m, standard section R1=6,982 mm (model keeps 6.982) - user check"
  ],
  "lining_reference": {
    "source": "C0060304-004..009 (콘크리트라이닝구조도)",
    "concrete": "fck 27 MPa",
    "rebar": "SD400 (fy 400 MPa)",
    "aggregate_mm": 25,
    "summary": "C0060304-004~009 | fck 27 MPa | SD400 | 입출구부 50 m 취약구간 철근 상세 (측점 대응 미확정)",
    "sheets": [
      {
        "sheet": "C0060304-004-콘",
        "groups": [
          [
            "A~C-2",
            "입출구부 50m"
          ]
        ]
      },
      {
        "sheet": "C0060304-005-콘",
        "groups": [
          [
            "E-1~2",
            "온도미고려"
          ],
          [
            "D-1~2",
            "입출구부 50m"
          ]
        ]
      },
      {
        "sheet": "C0060304-006-콘",
        "groups": [
          [
            "WL-1~2,RP-1~2",
            "온도미고려"
          ],
          [
            "E-1~2",
            "입출구부 50m"
          ]
        ]
      },
      {
        "sheet": "C0060304-007-콘",
        "groups": [
          [
            "WL-1~2",
            "입출구부 50m"
          ],
          [
            "WL-3~4",
            "온도미고려"
          ]
        ]
      },
      {
        "sheet": "C0060304-008-콘",
        "groups": [
          [
            "WL-3~4",
            "입출구부 50m"
          ]
        ]
      },
      {
        "sheet": "C0060304-009-콘",
        "groups": [
          [
            "P-2~3",
            "입출구부 50m"
          ]
        ]
      }
    ]
  }
}