Announcement　of　Ministry　of　Housing　and　Urban-Rural　Development　of　the　People　s　Republic　of　China

Foreword

1　General

2　Terms　and　Symbols

• 2.1　Terms

• 2.2　Symbols

3　Basic　Provisions

• 3.1　Survey

• 3.2　Geotechnical　Investigation

• 3.3　Engineering　Hydrological　Investigation　and　Surveying

• 3.4　Engineering　Meteorological　Investigation　and　Surveying

4　Survey　at　Feasibility　Study　Stage

• 4.1　General　Provisions

• 4.2　Indoor　Work

• 4.3　Field　Work

• 4.4　Survey　Results　to　be　Submitted

5　Survey　at　Preliminary　Design　Stage

• 5.1　General　Provisions

• 5.2　Indoor　Selection　of　Routing　Scheme

• 5.3　Field　Selection　of　Routing　Scheme

• 5.4　Aerial　Photographing

• 5.5　Establishment　of　GPS　Main　Control　Network　and　GPS　Field　Control　of　Aerial　Survey

• 5.6　Photograph　Annotation

• 5.7　Scanning　of　Aerial　Photographs

• 5.8　Aerial　Triangulation

• 5.9　Establishment　of　Three-dimensional　Digital　Model　for　Route

• 5.10　Route　Optimization　with　Three-dimensional　Digital　Model

• 5.11　Final　Results　to　be　Submitted

6　Survey　at　Detailed　Design　Stage

• 6.1　General　Provisions

• 6.2　Route　Selection　Survey

• 6.3　Straight　Line　Location　Survey

• 6.4　Survey　of　Stake　Spacing　and　Elevation　Difference

• 6.5　Horizontal　and　Elevation　Connection　Survey

• 6.6　Survey　of　Plans　and　Sections

• 6.7　Survey　of　Crossing-over

• 6.8　Location　and　Check　Survey

• 6.9　Survey　for　Sections　of　Tower　Foundations　and　Topography　of　Tower　Locations

• 6.10　Survey　of　Layout　Maps　of　Houses

• 6.11　Survey　of　Tower　Location　Coordinates

• 6.12　Survey　of　Distribution　of　Forest　Trees

• 6.13　Survey　of　Earth　Electrode　Site

• 6.14　Survey　Results　to　be　Submitted

7　Geotechnical　Investigation　at　Feasibility　Study　Stage

8　Geotechnical　Investigation　at　Preliminary　Design　Stage

9　Geotechnical　Investigation　at　Detailed　Design　Stage

• 9.1　General　Provisions

• 9.2　Investigation　of　Plains　and　River　Valleys

• 9.3　Investigation　of　Mountainous　and　Hilly　Areas

10　Geotechnical　Investigation　Methods

• 10.1　Engineering　Geological　Survey

• 10.2　Remote　Sensing　Interpretation

• 10.3　Engineering　Geophysical　Exploration

• 10.4　Exploration　and　Test

11　Geotechnical　Investigation　for　Special　Geotechnical　Areas

• 11.1　Collapsible　Loess

• 11.2　Frozen　Soil

• 11.3　Soft　Soil

• 11.4　Expansive　Rock　and　Soil

• 11.5　Red　Clay

• 11.6　Fill　Soil

• 11.7　Weathered　Rock　and　Residual　Soil

• 11.8　Saline　Soil

• 11.9　Compound　Soil

12　Geotechnical　Investigation　for　Areas　under　Special　Geological　Conditions

• 12.1　Karst　and　Caves

• 12.2　Landslide

• 12.3　Eboulement　and　Talus

• 12.4　Gully

• 12.5　Debris　Flow

• 12.6　Earthquake　Liquefaction

• 12.7　Goaf

13　Prototype　Test

• 13.1　General　Provisions

• 13.2　Foundation　Pile　Prototype　Test

• 13.3　Anchor　Foundation　and　Undistributed　Soil　Foundation　Test

• 13.4　Preparation　of　Prototype　Test　Results

14　Foundation　Pit　Inspection

15　Geotechnical　Engineering　Investigation　Results

• 15.1　General　Provisions

• 15.2　Feasibility　Study　Stage

• 15.3　Preliminary　Design　Stage

• 15.4　Detailed　Design　Stage

16　Engineering　Hydrological　Investigation　at　Feasibility　Study　Stage

• 16.1　General　Provisions

• 16.2　Depth　of　Investigation　Content　and　Technical　Requirements

• 16.3　Investigation　Results

17　Engineering　Hydrological　Investigation　at　Preliminary　Design　Stage

• 17.1　General　Provisions

• 17.2　Depth　of　Investigation　Content　and　Technical　Requirements

• 17.3　Investigation　Results

18　Engineering　Hydrological　Investigation　at　Detailed　Design　Stage

• 18.1　General　Provisions

• 18.2　Depth　of　Investigation　Content　and　Technical　Requirements

• 18.3　Investigation　Results

19　Hydrological　Investigation

• 19.1　General　Provisions

• 19.2　Survey　on　Effects　of　Human　Activities

• 19.3　Flood　Survey

• 19.4　Survey　on　Riverbed　Evolution

• 19.5　Survey　on　Ice　Conditions　and　Floats

• 19.6　Hydrological　Survey　for　Special　Regions

• 19.7　Hydrological　Test

20　Hydrological　Analysis　and　Calculation

• 20.1　General　Provisions

• 20.2　Design　Flood　of　Natural　Rivers

• 20.3　Design　Flood　Upstream　and　Downstream　Reservoir

• 20.4　Flood　Resulting　from　Levee　Breach　or　Dam　Break

• 20.5　Ice　Flood

• 20.6　Flood　in　Special　Regions

• 20.7　Design　Flood　Level

• 20.8　Design　Velocity

• 20.9　Hydrological　Analysis　and　Calculation　for　Seashores　and　Estuaries

21　Evolution　Analysis　on　River　（sea）　Bed

• 21.1　General　Provisions

• 21.2　Analysis　on　Riverbed　Evolution

• 21.3　Analysis　on　Seabed　Evolution

22　Engineering　Meteorological　Investigation　at　Feasibility　Study　Stage

• 22.1　General　Provisions

• 22.2　Investigation　Content　Depth　and　Technical　Requirements

• 22.3　Investigation　Results

23　Engineering　Meteorological　Investigation　at　Preliminary　Design　Stage

• 23.1　General　Provisions

• 23.2　Investigation　Content　Depth　and　Technical　Requirements

• 23.3　Investigation　Results

24　Engineering　Meteorological　Investigation　at　Detailed　Design　Stage

• 24.1　General　Provisions

• 24.2　Investigation　Content　Depth　and　Technical　Requirements

• 24.3　Investigation　Results

25　Meteorological　Survey

• 25.1　General　Provisions

• 25.2　Survey　on　Strong　Winds

• 25.3　Survey　on　Icing

• 25.4　Survey　on　Prevailing　Wind　Direction

• 25.5　Dedicated　Meteorological　Stations　and　Observation

26　Meteorological　Analysis　and　Calculation

Appendix　A：Sample　of　Plans　of　Crowded　Areas

Appendix　B：Sample　of　Relative　Position　Maps　of　Dangerous　Effects　of　Communication　Lines

Appendix　C：Sample　of　Plans　of　Incoming/Outgoing　Lines　of　Substations　or　Power　Plants

Appendix　D：Specifications　and　Burial　Dimensions　of　Stakes

Appendix　E：Sample　of　Relative　Position　Maps　of　Parallel　Adjacent　Lines

Appendix　F：Plans　and　Sections　of　Transmission　Lines

Appendix　G：Tables　of　Symbols　in　Plans　and　Sections

Appendix　H：Sample　of　Sub-sections　of　Crossing-over

Appendix　J：Sample　of　Sub-plans　of　Crossing-over

Appendix　K：Sample　of　Section　Maps　of　Tower　Foundations

Appendix　L：Sample　of　Topographic　Maps　at　Tower　Locations

Appendix　M：Sample　of　Layout　Maps　of　Houses

Appendix　N：List　of　Hydrological　Conditions　at　Tower　Foundations

Appendix　P：Calculation　of　Design　Wind　Speed

Appendix　Q：Calculation　of　Design　Ice　Thickness

Explanation　of　Wording　in　This　Code

List　of　Quoted　Standards