1.0.1 This code is formulated with a view to adapting the demand of urban rail transit construction and development, unifying the requirements for survey technique of urban rail transit engineering, and complying with the principle of advanced technology, economy and rationality, reliable quality and safety and usability.
1.0.2 This code is applicable to engineering survey for newly-built urban rail transit and old line renovation and during operation period.
1.0.3 The rail transit engineering control survey in the same city shall meet the following requirements:
1 The horizontal and elevation system shall be consistent with that of the located city;
2 Before engineering construction, dedicated horizontal and elevation construction control network shall be established on the basis of urban first order or second order horizontal and elevation control network, and the differences from the coordinates of existing urban control network coincidence point and from the elevation shall not be greater than 50mm and 20mm respectively;
3 Before construction, the built horizontal and elevation control network shall be re-surveyed, and tested in construction.
1.0.4 The interurban rail transit engineering control survey shall not only meet Clauses 2 and 3 of Article 1.0.3 in this code, but also adopt uniform coordinates and elevation system; where interurban coordinates and elevation system are inconsistent, they shall be subjected to corresponding conversion.
1.0.5 The line engineering control survey shall adopt connecting traverse (network) and connecting elevation route type. Under special circumstances, when open traverse and spur levelling line are adopted, inspection and check measures must be established.
1.0.6 Before tunnel penetration, connection survey, underground horizontal control survey and underground elevation control survey shall be carried out for three times independently along with the engineering progress; after the tolerance is met, the average value of each survey shall be used to guide the tunnel penetration.
1.0.7 The mean square error of transverse holing through survey of undermined and open cut tunnel as well as overhead structure is ±50mm and that of elevation holing through survey is ±25mm.
1.0.8 The line construction, adjacent main buildings and structures, pipelines, etc. shall be subjected to deformation and settlement monitoring within construction period and within certain time during operation period, and emergency deformation and settlement monitoring scheme shall be established.
1.0.9 The acceptance survey shall be carried out according to the requirements of engineering completion acceptance, and the work content and survey technique requirements shall meet the relevant requirements of the current national survey code, engineering acceptance code and engineering data management.
1.0.10 The survey instruments and tools shall be verified periodically according to the relevant laws and regulations of the nation. During operation, the influence of operating environment on instruments shall be avoided.
1.0.11 The urban rail transit engineering survey shall not only comply with this code, but also the requirements of the relevant national current standards.
1 General Provisions 1
2 Terms and Symbols 2
2.1 Terms 2
2.2 Symbols 3
3 Ground Horizontal Control Survey 4
3.1 General Requirements 4
3.2 Satellite Positioning Control Network Survey 5
3.3 Precise Traverse Network Survey 10
4 Ground Elevation Control Survey 13
4.1 General Requirements 13
4.2 Levelling Network Survey 15
5 Ribbon Topographic Survey of Line 17
5.1 General Requirements 17
5.2 Mapping Control Survey 18
5.3 Surveying and Mapping of Ribbon Topographic Map of Line 19
5.4 Aerial Photogrammetry 20
6 Special Investigation Surveying and Mapping 22
6.1 General Requirements 22
6.2 Underground Pipeline Investigation and Surveying and Mapping 24
6.3 Surveying and Mapping of Underground Building and Structure 26
6.4 Surveying and Mapping of Building and Structure Crossover Track 27
6.5 Topographic Survey of Water Area 27
6.6 Survey of House Removal 28
6.7 Surveying and Demarcation Survey 30
7 Route Location and Longitudinal and Transverse Section Survey 31
7.1 General Requirements 32
7.2 Preliminary Design Route Location Survey 32
7.3 Longitudinal and Transverse Section Survey 33
7.4 Ground Construction Route Location Survey 34
8 Depot Survey 35
8.1 General Requirements 35
8.2 Depot Construction Control Survey 36
8.3 Construction Site Survey 36
8.4 Construction Survey of Building and Structure and Auxiliary Facilities 37
8.5 Car Yard Line, Release Line and Ground Liaison Line Survey 38
9 Connection Survey 38
9.1 General Requirements 38
9.2 Control Point Survey near the Ground Well 39
9.3 Connection Triangle Survey 39
9.4 Combined Orientation Survey of Gyro-theodolite and Plumb Instrument (Steel Wire) 40
9.5 Direct Traverse Transfer Survey 41
9.6 Plumbing Orientation Survey 42
9.7 Elevation Connection Survey 42
10 Underground Control Survey 43
10.1 General Requirements 43
10.2 Horizontal Control Survey 43
10.3 Elevation Control Survey 44
11 Undermined Tunnel and Station Construction Survey 45
11.1 General Requirements 45
11.2 Construction Traverse and Construction Elevation Survey 45
11.3 Station Construction Survey 46
11.4 Section Tunnel Construction Survey with Mine Tunnelling Method 47
11.5 Section Tunnel Construction Survey with Shield Tunnelling Method 48
11.6 Holding Through Error Survey 49
12 Open Cut Tunnel and Station Construction Survey 50
12.1 General Requirements 50
12.2 Construction Survey of Foundation Pit Building Envelope 51
12.3 Foundation Pit Excavation Construction Survey 51
12.4 Structure Construction Survey 52
13 Overhead Structure Construction Survey 53
13.1 General Requirements 53
13.2 Column and Pier Foundation Setting-out Survey 53
13.3 Column and Pier Construction Survey 54
13.4 Transverse Beam Construction Survey 54
13.5 Longitudinal Beam Construction Survey 55
14 Track Adjusting and Structural Section Survey 56
14.1 General Requirements 56
14.2 Track Adjusting Survey 56
14.3 Structural Section Survey 58
14.4 Track Adjusting Survey after Modification 58
15 Track Laying Benchmark Survey 60
15.1 General Requirements 60
15.2 Control Benchmark Survey 60
15.3 Compaction Benchmark Survey 61
15.4 Turnout Benchmark Survey 62
16 Magnetic Suspension and Straddle Rail Transit Engineering Survey 64
16.1 Magnetic Suspension Rail Transit Engineering Survey 64
16.2 Straddle Rail Transit Engineering Survey 65
17 Equipment Installation Survey 68
17.1 General Requirements 68
17.2 Contact Rail and Contact Network Installation Survey 68
17.3 Partition Door Installation Survey 68
17.4 Running Signal and Line Mark Installation Survey 69
17.5 Station Platform and Shield Door Installation Survey 69
18 Deformation and Settlement Monitoring 70
18.1 General Requirements 70
18.2 Monitoring Control Network Survey 72
18.3 Structure Construction Deformation and Settlement Monitoring 74
18.4 Environment Deformation and Settlement Monitoring along the Line in Construction Stage 76
18.5 Deformation and Settlement Monitoring in Operation Stage 77
18.6 Data Processing and Information Feedback 78
19 Acceptance Survey 79
19.1 General Requirements 79
19.2 Acceptance Survey on Line Rail 79
19.3 Acceptance Survey on Section, Station and Auxiliary Building Structure 80
19.4 Acceptance Survey of Equipment along the Line 81
19.5 Acceptance Survey of Underground Pipelines 81
19.6 Acceptance Survey of Magnetic Suspension and Straddle Rail Transit Engineering 82
20 Survey Result Data Acceptance 83
Appendix A Ground Horizontal Control Survey 84
Appendix B Ground Elevation Control Survey 88
Appendix C Route Location Survey 89
Appendix D Combination Orientation Diagram of Gyro-theodolite and Plumb Instrument 91
Appendix E Underground Horizontal and Elevation Survey 92
Appendix F Overhead Line Construction Survey 95
Appendix G Track Adjusting Survey 96
Appendix H Track Laying Benchmark Survey 102
Appendix J Deformation and Settlement Monitoring 105
Appendix K Acceptance Survey 108
Explanation of Wording in This Code 112
