1 General Provisions
1.0.1 This code is formulated to conduct the investigation and surveying of the 330kV~750kV overhead transmission line in accordance with the relevant laws, regulations, guidelines and policies as well as the natural conditions to make it safe and reliable, advanced and applicable, economical and rational and environmental-friendly so as to improve the investment benefits and ensure the line safety and normal operation.
1.0.2 This code is applicable to the feasibility study stage, preliminary design stage, survey of working drawing design stage, geotechnical investigation, engineering hydrological investigation and surveying and engineering meteorological investigation and surveying of the newly-built and renovated 330kV~750kV overhead transmission line. This code is not applicable to the investigation and surveying of the large crossing engineering of overhead transmission line.
1.0.3 For the purpose of the overhead transmission line engineering, the investigation and surveying stage shall be divided corresponding to the design stage and may be divided into the investigation and surveying of feasibility study stage, investigation and surveying of preliminary design stage and investigation and surveying of working drawing design stage.
1.0.4 The measuring instrument and equipment used in the investigation and surveying of the engineering must be verified periodically according to the national measurement methods; the professional application software shall be authenticated or verified.
1.0.5 The original record of the engineering investigation and surveying must be true and accurate; the collected reference shall be verified.
1.0.6 This code specifies the basic technical requirements for investigation and surveying of 330kV~750kV overhead transmission line. If this code conflicts with the requirements of the national laws and administrative regulations, the national laws and administrative regulations shall apply.
1.0.7 For the 330kV~750kV overhead transmission line, the engineering survey, geotechnical investigation, engineering hydrological investigation and surveying and engineering meteorological investigation and surveying shall not only comply with this code but those in the current relevant standards of the nation.
2 Terms and Symbols
2.1 Terms
2.1.1 Large crossing
The strain section that gives special consideration on the wire selection or tower design needs owing to larger distance between two poles (above 1000m) or higher tower (above 100m) when the line crosses the navigation river, lake or strait and has a strong impact on navigation or is especially difficult in repair in case of fault.
2.1.2 Straight line location survey
The survey in which stakes of straight line are provided in the direction connecting the two corners for the works of plane and section, cross and location survey.
2.1.3 Linearity
The extent to which the stake of straight line deviates from the theoretical straight line between two turning point stakes when both are projected on the same plane.
2.1.4 The stake of straight line
The control stake position which is set in the connecting line of two corners for the follow-up survey work like plan and section, cross and positioning.
2.1.5 Directional stake
The stakes on the front and rear straight lines and nearby the front and rear corners in the location of line or positioning for guiding the straight line direction.
2.1.6 Distance between two stakes
The horizontal distance between two adjacent stakes of straight line or the stake of straight line and adjacent turning point stake.
2.1.7 Difference of elevation between two stakes
1 General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3 Basical Requirements
3.1 Survey
3.2 Geotechnical Investigation
3.3 Engineering Hydrological Investigation and Surveying
3.4 Engineering Meteorological Investigation and Surveying
4 Survey of Feasibility Study Stage
4.1 General Requirements
4.2 Office Work
4.3 Field Work
4.4 Finished Products Submitted
5 Survey of Preliminary Design Stage
5.1 General Requirements
5.2 Route Selection Plan Indoor
5.3 Route Selection Plan Outdoor
5.4 Aerial Photography
5.5 Establishment of GPS Control Network and GPS Field Control Point
5.6 Photo Annotation
5.7 Aerial Photo Scanning
5.8 Acrotriangulation
5.9 Establishment of 3D Digital Route Model
5.10 Optimization of 3-D Digital Model Route Model
5.11 Finished Products Submitted
6 Survey of Working Drawing Design Stage
6.1 General Requirements
6.2 Route Selection Survey
6.3 Straight Line Location Survey
6.4 Survey of Distance Between Two Stakes and Different of Elevation
6.5 Plane and Elevation Connection Survey
6.6 Plane and Section Survey
6.7 Cross Survey
6.8 Positioning and Test Survey
6.9 Section Survey of Tower Foundation and Topograohic Survey of Tower Position
6.10 House Distribution Survey
6.11 Tower Coordinate Survey
6.12 Forest Distribution Survey
6.13 Grounding Electrode Positioning Survey
6.14 Finished Product Submitted
7 Geotechnical Investigation of Feasibility Study Stage
8 Geotechnical Investigation of Preliminary Design Stage
9 Geotechnical Investigation of Working Drawing Design Stage
9.1 General Requirements
9.2 Investigation for Plain and River Valley
9.3 Investigation for Mountain and Hill
10 Method of Geotechnical Investigation
10.1 Engineering Ecological Survey
10.2 Remote Sensing
10.3 Geophysical Exploration
10.4 Exploration and Testing
11 Geotechnical Investigation for Special Lithology
11.1 Collapsible Loess
11.2 Frozen Soil
11.3 Soft Soil
11.4 Swelling Soil and Rock
11.5 Red Clay
11.6 Filled Ground
11.7 Weathered Rock and Residual Soil
11.8 Saline Soil
11.9 Mixed Soil
12 Geotechnical Investigation for Special Geologic Condition
12.1 Karst and Cave
12.2 Landslipe
12.3 Avalanche and Collapse Heap
12.4 Gully
12.5 Debris Flow
12.6 Seismic Liquefaction
12.7 Mined out Space
13 Prototype Test
13.1 General Provisions
13.2 Prototype Test for Pile Foundation
13.3 Anchored Foundation and Shallow Foundation Test
13.4 Result Reporting for Prototype Test
14 Foundation Pit Proving
15 Result of Geotechnical Investigation
15.1 General Provisions
15.2 Feasibility Study Stage
15.3 Preliminary Design Stage
15.4 Working Drawing Design Stage
16 Engineering Hydrological Investigation and Surveying of Feasibility Study Stage
16.1 General Requirements
16.2 Contents and Technical Requirements
16.3 Outcome
17 Engineering Hydrological Investigation and Surveying of Preliminary Design Stage
17.1 General Requirements
17.2 Contents and Technical Requirements
17.3 Outcome
18 Engineering Hydrological Investigation and Surveying of Working Drawing Design Stage
18.1 General Requirements
18.2 Contents and Technical Requirements
18.3 Outcome
19 Hydrological Investigation and Surveying
19.1 General Requirements
19.2 Impact of Human Activity
19.3 Flood and Waterlogging
19.4 Fluvial Process
19.5 Ice and River Float
19.6 Specific Areas
19.7 Hydrological Survey
20 Hydrological Analysis and Calculation
20.1 General Requirements
20.2 Natural River Design Flood
20.3 Design Flood about the Upstream and Downstream of the Reservoir
20.4 Dike-breach and Dam-break Design Flood
20.5 Ice Flood
20.6 Special Area Design Flood
20.7 The Design Flood Stage
20.8 The Design Flow Rate
20.9 The Hydrological Analysis about the Coastal and River Mouth Area
21 The Evolution Analysis of the River (Sea) Bed
21.1 General Requirements
21.2 Analysis of the Evolution of the River Bed
21.3 Analysis of the Evolution of the Seabed
22 Engineering Meteorological Investigation and Surveying of Feasibility Study Stage
22.1 General Requirements
22.2 Contents and Technical Requirements
22.3 Outcome
23 Engineering Hydrological Investigation and Surveying of Preliminary Design Stage
23.1 General Requirements
23.2 Contents and Technical Requirements
23.3 Outcome
24 Engineering Meteorological Investigation and Surveying of Working Drawing Design Stage
24.1 General Requirements
24.2 Contents and Technical Requirements
24.3 Outcome
25 Meteorological Survey
25.1 General Requirements
25.2 Strong Wind
25.3 Wire Ice Covering
25.4 Predominant Wind Direction
25.5 Meteorology Special-purpose Station and Observation
26 Meteorological Analysis and Calculation
Appendix A Planemetic Map in Crowded Area
Appendix B Relative Position Samples of Communication Line Risk Influence
Appendix C Plan Legend for Substation or Power Plant Lines In and Out
Appendix D Survey Stake Standard and Embedding Size
Appendix E Relative Position Plan Samples of Parallel Proximity Line
Appendix F Plan and Section Samples of Transmission Line
Appendix G Symbol List of Planemetric and Section Plan
Appendix H Intersection and Cross Section Plan
Appendix J Intersection and Cross Planemetric Plan
Appendix K Tower Foundation Section Plan
Appendix L Tower Position Topographic Map
Appendix M House Distribution Map
Appendix N The Schedule of Hydrological Condition about Pole Tower
Appendix P The Calculation about the Design Wind Speed
Appendix Q The Calculation about the Design Wire Ice Covering Thickness
Explanation of Wording in This Code
List of Quoted Standards
