diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index 3db3dc1..8e279dd 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -190,20 +190,28 @@ message RunLine {
   string lineId = 10;
 }
 
+/** 物理区段 */
 message Section {
   enum SectionType {
-    Physical = 0;
-    Logic = 1;
-    TurnoutPhysical = 2;
+    Physical = 0;        //物理区段
+    TurnoutPhysical = 2; //道岔物理区段
   }
 
   CommonInfo common = 1;
   string code = 2;
   repeated Point points = 3;
-  RelatedRef paRef = 4;              // 区段A端关联的设备(非岔区)
-  RelatedRef pbRef = 5;              // 区段B端关联的设备(非岔区)
+  RelatedRef paRef = 4; // 区段A端关联的物理区段或道岔(非岔区)
+  RelatedRef pbRef = 5; // 区段B端关联的物理区段或道岔(非岔区)
   SectionType sectionType = 6;       // 区段类型
-  repeated string axleCountings = 7; // 关联的计轴
+  repeated string axleCountings = 7; // 关联的计轴(岔区&&非岔区)
+  repeated string children = 8;      // 下属逻辑区段id(非岔区)
+}
+
+/** 逻辑区段 */
+message LogicSection {
+  CommonInfo common = 1;
+  string code = 2;
+  repeated Point points = 3;
 }
 
 message KilometerPoint {