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TB 10180-2016

Chinese Standard: 'TB 10180-2016'
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BASIC DATA
Standard ID TB 10180-2016 (TB10180-2016)
Description (Translated English) Technical Code for Lightning Protection and Earthing of Railway
Sector / Industry Railway & Train Industry Standard
Classification of Chinese Standard P65
Word Count Estimation 72,797
Date of Issue 2016-04-11
Date of Implementation 2016-07-01
Quoted Standard GB/T 19663; GB 50057; GB/T 50064; GB 50065; GB 50074; GB/T 50262; GB 50300; GB 50343; GB 50601; GB 50689; GB/T 28026.1; TB/T 3233; TB 10301; TB 10302; TB 10303; TB 10304; TB 10305; TB 10306
Drafting Organization China Railway Second Hospital Engineering Group Co., Ltd
Administrative Organization China Railway Second Hospital Engineering Group Co., Ltd
Regulation (derived from) National Railway Science and Law (2016) on the 11th

TB 10180-2016
Technical Code for Lightning Protection and Earthing of Railway
Issued on June 1, 2017
Issued by National Railway Administration of the People’s Republic of China
General Part
1 General Provisions
1.0.1 This Code is formulated with a view to unifying the technical standards for the design,
construction and construction quality acceptance of lightning protection and earthing of railway.
1.0.2 This Code stipulates the general requirements for lightning protection and earthing of railway
and it is applicable to the design, construction and construction quality acceptance of lightning
protection and earthing of new and reconstructed railways. It does not involve the special requirements for lightning protection and earthing of each discipline.
1.0.3 The design and construction of lightning protection and earthing of railway shall comply with
the requirements for safety and reliability, advanced and proven technologies, as well
rationality, and shall follow the principle of overall planning, systematic optimization and
comprehensive protection.
1.0.4 The lightning protection and earthing of railway shall be designed, constructed and accepted
synchronously with the related main works.
1.0.5 For the design of lightning protection and earthing of railway, the topographical, geological and
meteorological conditions in the area where the railway is located shall be investigated to determine the lightning protection and earthing measures reasonably.
1.0.6 For lightning protection and earthing of reconstructed railway, the current status of the existing lightning protection facilities and earth-termination systems of railway shall be investigated to make of the existing conditions.
1.0.7 For the electric traction power supply system, the relevant the electromagnetic interference;the relevant interference for the electronic information system of railway.
1.0.8 For the construction of lightning protection and earthing of railway, a quality
shall be established and the whole-process control and management shall be conducted for the
engineering construction quality.
1.0.9 New technology, techniques, materials and equipment applied for lightning protection and
earthing of railway shall comply with the relevant provisions on railway engineering construction
management.
1.0.10 Besides this Technical Code, the design, construction and construction quality acceptance of
lightning protection and earthing of railway shall also conform to the relevant national and industrial
standards.
4 Integrated Earthing Design
4.1 General Requirements
4.1.1 The design of integrated earthing system shall involve the run-through earthing cables and the
earth-termination system which consists of earth electrode, earthing terminal and earthing conductor.
4.1.2 The following factors shall be considered in the design of integrated earthing system.
1 Distribution and design scheme of pipelines, buildings and structures along the railway.
2 Distribution of trackside equipment for communication, traction power supply,
disaster monitoring, etc.
3 Maximum short-circuit current of contact line system.
4 Soil resistivity along the railway.
5 Related design scheme for lightning protection.
4.1.3 The OCS mast and the metal structures and electrical equipment within 5 m from the live parts
of OCS must be connected to the integrated earthing system.
4.1.4 The earth-termination systems of railway buildings and structures within 20 m from the run-
through earthing cables shall be in equipotential bonding with the integrated earthing system.
4.1.5 In the OCS zone and the pantograph zone of railway, the permissible touch voltage
or accessible voltage of the AC traction systems under different time duration conditions shall comply with the requirements of Railway Applications-Fixed Installations-Part 1. Protective Provisions Relating to Electrical Safety and Earthing (GB/T 28026.1). The time duration conditions shall comply with the following provisions.
1 The time duration conditions divided into short time, temporary and permanent. The short
time duration condition shall be applied to the touch voltage only.
2 The time durations for short time and temporary are 0.1 s and 300 s respectively and that for
permanent is more than 300 s.
4.1.6 The earth resistance at earthing terminals of the integrated earthing system shall not be
greater than.
4.1.7 The earth resistance of independent earth-termination system for buildings and structures
along the line should firstly conform to the requirements for itself before it is in equipotential bonding with the integrated earthing system.
4.2 Run-through Earthing Cable
4.2.1 For the integrated earthing system of double-track railways, each run-through earthing cable
shall be laid respectively along both sides of the railway.
4.2.2 The cross-sectional area of the run-through earthing cable shall comply with the requirements
of rated short-time withstand current and rated peak withstand current when a short circuit of the
contact line system occurs.
4.2.3 The performance and environmental protection requirements for the construction, conductor
and outer sheath of the run-through earthing cable shall comply with the requirements of relevant
national and professional technical standards.
4.2.4 The layout of run-through earthing cables in at-grade sections shall comply with the following
provisions.
1 In the embankment sections and cutting sections of soil or soft rock, the run-through earthing
cables shall be laid under the cable trenches for communication and signaling at 300 mm-400 mm away from the top of the bottom layer of subgrade bed or from the bottom of the cable trenches.
2 In the rock cutting sections, the run-through earthing cables shall be laid in a trench at a depth
under the bottom of the cable trenches for communication and signaling and this trench
shall be backfilled with fine-grained soil for protection.
4.2.5 In the at-grade sections, branch lead wires of the run-through earthing cables shall be arranged
according to the corresponding position of OCS masts and shall be used for the equipotential bonding between the foundation earth-termination system of OCS masts and the run-through earthing cables. The branch lead wires shall be made of the same material and with the same cross-sectional area that of the run-through earthing cables.
4.2.6 The layout and the isolation protection measures for the run-through earthing cables in bridge
sections shall comply with the following provisions.
1 If the monolithic deck arrangement is adopted for the bridge, the run-through earthing cables shall be laid in the waterproof layer under the cable troughs for communication and signaling for physical isolation protection.
2 If the external suspended cable trays with partition boards are provided for the bridge, the
through earthing cables shall be laid in comparted small grooves separately from the communication
cable and signal cable and they shall be under physical isolation protection through the partition boards of the cable trays.
4.2.7 In the tunnel sections, the run-through earthing cables shall laid in the cable troughs for
communication and signaling and shall be sealed with cement mortar for physical isolation.
4.2.8 The run-through earthing cables on both sides of the line shall be connected transversely in
compliance with the following provisions.
1 In the at-grade sections, transverse connection should be made at an interval of 500 m and the
cross-sectional area transverse connection wires shall be made of the same material and with the
the run-through earthing cables.
2 In the bridge sections, the transverse connection between run-through earthing cables on both sides shall be realized through the transverse earthing reinforcing bars at the ends of beams of each span.
3 In the tunnel sections, the transverse connection between run-through earthing cables on both
sides shall be realized through the circumferential earthing reinforcing bars for secondary lining.
4.2.9 The run-through earthing cables near the platforms should be laid along the platform wall and
near the line side.
4.2.10 The setting of signs for run-through earthing cables shall comply with the following provisions.
1 Signs shall be set at turnings and branches of the route, at transverse connections in at-grade
sections and locations where cross large pipelines or high-voltage cables or other obstacles.
2 Signs should be shared when the run-through earthing cables are laid in the same route as the
optical cables and power cables.
3 Signs shall be set at the splicing joints of run-through earthing cables.
4.3 Earth Electrode and Earthing Terminal
4.3.1 The non-prestressed structural reinforcing bars in the OCS mast foundation should be utilized
the earth electrode in at-grade sections. The earthing reinforcing bars shall be provided if there is no
non-prestressed structural reinforcing bar in the OCS mast foundation.
4.3.2 The layout of earthing terminals in at-grade sections shall comply with the following
provisions.
1 Earthing terminals shall be provided on the sides of the OCS mast foundation. They shall be
connected to the run-through earthing cables through the branch lead wires and welded to the earthing reinforcing bars in the OCS mast foundation.
2 Earthing terminals shall be provided properly at a distance not less than 15 m from the OCS
mast according to the earthing requirements of the trackside signal equipment or facilities.
3 Earthing terminals may be provided in the cable shafts as required.
4.3.3 The non-prestressed structural reinforcing bars in the pier structures shall be utilized as the
earth electrode in bridge sections in compliance with the following provisions.
1 For the piers supported by pile foundation,1 main column reinforcing bar shall be selected
from each pile as the vertical earthing reinforcing bar for the earth electrode. The structural reinforcing bar in the pile cap shall be adopted to connect the vertical earthing reinforcing bar in a ring shape to form an earth electrode.
2 For the piers supported by open-cut foundation, a layer of reinforcing mesh shall be provided at
the base bottom and used as the horizontal earth electrode. The distance from the outer edge of the
reinforcing mesh to the bottom of the pile cap concrete shall not be greater than 70
3 At least 2 earthing reinforcing bars shall be provided in each pier, with one end welded to the
reinforcing bar of the lower earth electrode and the other end welded to the earthing terminal at the upper pier cap.
4.3.4 The non-prestressed structural reinforcing bars in structures shall be utilized as the earth-
termination system for beam body and the following provisions shall be complied with.
1 For ballastless track bridge, 2 longitudinal earthing reinforcing bars shall be embedded into the
upper layer of the beam between track slabs at equal spacing.
2 For ballasted track bridge,1 longitudinal earthing reinforcing bar shall be embedded into the
upper layer of the beam in the middle between the up track and down track.
3 At the upper part of the protection walls on both sides of the bridge beam, the longitudinal
structural reinforcing bars within the upper layer shall be utilized as the earthing reinforcing bars.
4 The longitudinal earthing reinforcing bars of the beam body shall be welded to the transverse
structural reinforcing bars at the beam ends.
4.3.5 The layout of earthing terminals in bridge sections shall comply with the following provisions.
1 Earthing terminals shall be provided at the bottom of beams in each span and used for the
earthing connection between the beam body and the piers.
2 Earthing terminals shall be provided at the top of beams in each span and used for the earthing
connection between the run-through earthing cables and the trackside equipment or facilities.
3 Earthing terminals shall be provided at the bridge pier cap and used for the connection between
the earth-termination systems of piers and that of beam body.
4 Earthing terminals may be provided at the lower part of the piers without water and used for
the detection of earth resistance and the connection of external artificial earth electrodes.
Related standard:   TB 10181-2017  TB 10182-2017
Related PDF sample:   TB 10035-2018  TB 10001-2016
   
 
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