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GB 50373-2019: Design code for communication conduit and passage engineering
Status: Valid GB 50373: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 50373-2019 | English | 1219 |
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Design code for communication conduit and passage engineering
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GB 50373-2019
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| GB 50373-2006 | English | 999 |
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Design code for communication conduit and passage engineering
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GB 50373-2006
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PDF similar to GB 50373-2019
Basic data | Standard ID | GB 50373-2019 (GB50373-2019) | | Description (Translated English) | Design code for communication conduit and passage engineering | | Sector / Industry | National Standard | | Classification of Chinese Standard | P76 | | Classification of International Standard | 33.020 | | Word Count Estimation | 61,613 | | Date of Issue | 2019 | | Date of Implementation | 2020-01-01 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation | GB 50373-2019: Design code for communication conduit and passage engineering---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 In order to meet the needs of modern urban construction and information development, coordinate the location of communication pipelines and passages in the city's underground space, coordinate the relationship with other urban engineering pipelines, and provide a basis for the planning and management of communication pipelines and passages, to formulate this standard.
1.0.2 This standard applies to the design of urban underground communication pipelines and channel engineering.
1.0.3 Communication channels should be constructed in advance, and the construction of communication channels and channels should conform to the principle of joint construction and sharing.
1.0.4 In the engineering design of communication pipelines and channels, stereotyped products that meet the relevant national technical requirements should be selected, and qualified pipes should be used in the project.
1.0.5 The construction of communication pipelines and channels shall not only comply with this standard, but also comply with the provisions of the current relevant national standards.
2 terms
2.0.1 Trunk pipeline
It generally covers urban arterial roads and mainly connects core/aggregation nodes or communication pipes between core/aggregation nodes and access points, including outbound and main road pipes.
2.0.2 branch pipeline
It generally covers urban branch roads and mainly connects the communication pipeline between the main pipeline and the resident network pipeline.
2.0.3 Customer premises network (CPN) pipeline
The pipelines outside the red line of municipal planning mainly include communication pipelines in buildings and residential areas within the red line of architectural planning, as well as pipe grooves inside buildings, etc.
2.0.4 integrated communication building
The comprehensive communication building, the core computer room of the communication network, and the computer room where various business core equipment are located.
2.0.5 communication station telecommunication station
Relay stations and local network service convergence computer rooms generally refer to the computer rooms where various service convergence/convergence devices in the local network are located.
3 Basic Regulations
3.0.1 Communication pipeline and channel planning should be based on urban development planning and overall communication construction planning, and communication pipeline construction planning should be included in urban construction planning.
3.0.2 Communication channels and passages should be overall planned according to the development needs of each user unit and in accordance with the principle of joint construction and sharing.
3.0.3 The overall planning of communication pipelines should include planning and construction schemes such as main pipelines, branch pipelines, and resident network pipelines to form a pipeline network, and consider the feasibility and economy of implementation.
3.0.4 For newly built and rebuilt buildings, the embedded communication pipeline outside the building shall be carried out simultaneously with the construction of the building, and shall be connected with the public communication pipeline.
3.0.5 For urban bridges, tunnels, high-grade highways and other buildings, communication channels should be constructed simultaneously or the location of communication channels should be reserved.
3.0.6 On a wide road with a large final pipe hole capacity, when the distance between the planned road red lines is greater than or equal to 40m, communication pipes or channels should be built on both sides of the road; when it is less than 40m, communication pipes should be built On the side with more users, cross-street pipelines should be built, or according to specific conditions.
3.0.7 Reconstruction and expansion of pipeline projects should first consider adding expansion holes on the top of the original pipeline, and it is not suitable to add expansion holes on both sides of the original pipeline.
3.0.8 The construction of communication pipelines and passages should be constructed simultaneously with the urban related underground pipelines.
4 Determination of communication pipeline and channel routing and location
4.0.1 The determination of communication channels and channel routing shall comply with the following regulations.
1 Communication pipelines and passages should cover the main roads, buildings and residential quarters in the city, and communication pipelines should also be built on the main roads in the suburbs of the city;
2 The selection of communication pipeline and channel routing should fully study the feasibility of branch construction on the basis of pipeline planning;
3 Communication pipelines and channel routing should be far away from harmful substances and chemical corrosion areas;
4.For communication pipelines and channel routing, priority should be given to choosing underground roads with fewer obstacles on the ground;
5 Communication pipelines and passages should not be built on roads that have been planned but have not yet been formed, or on roads that have been formed but the soil has not been consolidated, as well as in quicksand and muddy areas.
4.0.2 When selecting the location of communication pipelines and passageways, the following regulations should be met.
1.It should be built under the sidewalk. If it cannot be built under the sidewalk, it can be built under the non-motor vehicle lane or the green belt, and it is not suitable to be built under the motor vehicle lane;
2 The location of the communication pipeline building on the high-grade highway shall be selected according to the following order. under the central divider, on the road shoulder and side slope, and within the roadside barrier;
3 The position of the communication pipeline and passage should be on the same side as the communication pole road;
4 The centerline of the communication pipeline and the channel shall be parallel to the centerline of the road or the red line of the building;
5 The location of communication pipelines and passages should not be selected near other pipelines buried deep.
4.0.3 Communication pipelines and channels should avoid being built on the same side of the road as gas pipelines, heat pipelines, oil pipelines, and high-voltage power cables.
4.0.4 When communication pipelines, passages and other underground pipelines and buildings are constructed on the same side, the minimum clear distance between communication pipelines, passages and other underground pipelines and buildings shall meet the requirements in Table 4.0.4.
Table 4.0.4 Minimum clear distance between communication pipelines, channels and other underground pipelines and buildings
Note. 1 When the main drainage pipe is laid later, the parallel net distance between the construction ditch of the drainage pipe and the existing communication pipeline shall not be less than 1.5m.
2 When the pipeline passes through the lower part of the drainage pipe, the clear crossing distance shall not be less than 0.4m.
3 Within the 2m range of the gas pipes with joints and auxiliary equipment, the communication pipes shall not intersect with the gas pipes.
4 When the protection tube is added to the power cable, the clear distance between the communication pipeline and the power cable shall not be less than 0.25m.
5 d is the outer diameter.
4.0.5 No other pipelines shall pass through the man (hand) hole.
4.0.6 The crossing angle between the communication pipeline and the railway and tramway should not be less than 60°. When crossing, the distance from the switch and regression line should not be less than 3m. When steel pipes are used at the intersection with tramways or electric railways, safety protection measures should be taken.
5 Determination of communication pipeline capacity
5.0.1 The capacity of pipe holes should be calculated according to the business forecast and specific conditions, and the number of pipe holes in each section can be estimated according to the provisions in Table 5.0.1.
Table 5.0.1 Tube Hole Capacity Table
Note. 1.Users include public users and leased line users.
2 At present, some special and important private networks still need to build cables.
3 Wireless network base stations include macro base stations, distributed system base stations, and optical fiber remote stations.
5.0.2 The pipeline capacity should be determined according to the long-term needs and the reasonable combination of pipe groups, and spare holes should be reserved.
5.0.3 On a route, pipelines should be laid at one time according to the long-term capacity.
5.0.4 The incoming (station) pipeline should be constructed at one time according to the demand of the terminal (station). When the pipe hole is larger than 48 holes, it can be used as a channel and should be connected from the basement.
6 Pipe selection
6.0.1 The materials that can be selected for communication pipelines mainly include plastic pipes, cement pipe blocks and steel pipes.
6.0.2 The specifications and scope of application of plastic pipes for communication shall comply with the provisions in Table 6.0.2.
Table 6.0.2 Commonly used plastic pipe specifications and scope of application
6.0.3 The specifications and scope of application of cement pipe blocks shall comply with the provisions in Table 6.0.3.
Table 6.0.3 Commonly used cement pipe block specifications and scope of application
6.0.4 Steel pipes should be used when crossing roads or bridges.
6.0.5 Plastic pipes should be selected for urban roads with many comprehensive pipelines and complex terrain, and silicon core pipes should be used for long-distance optical cable pipes in suburban and outdoor areas.
7 Buried depth of communication pipeline
7.0.1 The buried depth of communication pipelines shall comply with the requirements in Table 7.0.1.When the requirements are not met, concrete encapsulation or steel pipe protection shall be adopted.
Table 7.0.1 Minimum depth from road surface to pipe top (m)
7.0.2 The top of the foundation of the pipeline entering the manhole (hand) hole shall not be less than 0.40m from the top of the foundation of the manhole (hand) hole, and the distance from the top of the pipeline to the overlying bottom of the manhole (hand) hole shall not be less than 0.30m.
7.0.3 When encountering the following situations, corresponding adjustments or special designs should be made for the laying of communication pipelines.
1 When urban planning changes the road surface elevation after road expansion and reconstruction in the future;
2 When the spacing when crossing with other underground pipelines does not meet the requirements in Table 4.0.4;
3 When the height of the groundwater table and the depth of the permafrost have an impact on the pipeline.
7.0.4 The pipeline laying should have a slope, the pipeline slope should be 3‰～4‰, not less than 2.5‰.
7.0.5 In the longitudinal section, when the pipeline cannot be built in a straight line due to avoiding obstacles, the pipeline can be folded to the man (hand) holes at both ends to bend downward smoothly, and no upward bend ("U" bend) is allowed.
8 Communication pipe bends and segment lengths
8.0.1 The length of the pipe section shall be determined according to the position of the man (hand) hole. On straight-line routes, the segment length of plastic pipelines should not exceed.200m, the segment length of cement pipelines should not exceed 150m, and the segment length of communication pipelines on high-grade highways should not exceed 1000m.
8.0.2 Each section of pipeline should be laid in a straight line. When the road is curved or needs to go around ground and underground obstacles, and manholes are set at the bending point and the pipeline section is too short, a curved pipeline can be built. The section length of the curved pipe should be less than the maximum allowable section length of the straight pipe.
8.0.3 The radius of curvature of cement pipe bends shall not be less than 36m, and the radius of curvature of plastic pipes shall not be less than 10m. The angle between the center of the curved pipe should be maximized, and the same section of pipe should not have a reverse bend ("S" bend) or a curved pipe with a central angle of less than 90° ("U" bend).
8.0.4 When horizontal directional drilling is used to lay pipes, the radius of curvature of the drilling trajectory shall meet the radius of curvature of the drill pipe at the same time, and the determination of the maximum pullback force in the axial direction and the minimum radius of curvature shall meet the mechanical performance requirements of the pipe.
9 Communication pipeline laying
9.0.1 The laying of communication pipelines shall comply with the following regulations.
1 The load and strength of the pipeline shall meet the design requirements;
2 The pipeline should be built on the natural foundation of stable soil with the soil bearing capacity greater than or equal to 2 times the load and the foundation pit is above the groundwater level or on the artificial foundation artificially reinforced on unstable soil. For different pipeline foundations, the pipeline trench foundation should meet the required bearing capacity;
3 During the pipeline laying process and after the construction is completed, the pipe opening entering the man (hand) hole should be tightly sealed;
4 Special design shall be carried out for sections with high groundwater level and permafrost;
5 The grouping and combination of pipelines shall comply with the relevant provisions of the current industry standard "Atlas of Cross Sections of Communication Pipelines" YD/T 5162.
9.0.2 The laying of plastic pipes shall comply with the following regulations.
1 In areas with good soil quality, the bottom of the trench should be tamped after the trench is dug, and the bottom of the trench should be backfilled with 50mm of fine sand or fine soil.
2 In areas with slightly poor soil quality, concrete foundation should be built after the trench is dug, and 50mm of fine sand or fine soil should be backfilled on the foundation.
3 In areas with poor soil quality, the reinforced concrete foundation should be built after the trench is dug, and 50mm of fine sand or fine soil should be backfilled on the foundation, and the pipeline should be sealed with concrete.
4 In areas where the soil is rock, gravel, or frozen soil,.200mm of fine sand or fine soil should be backfilled after the trench is dug.
5 The bottom of the ditch should be flat and free of protruding hard objects, and the pipeline should be close to the bottom of the ditch.
6 When the pipeline enters the manhole (hand) hole or building, a reinforced concrete foundation and enclosure not less than 2m long shall be made near the manhole (hand) hole or the side of the building.
7 Pipes with large inner diameters should be placed on the bottom and outside of the pipe group, and pipes with small inner diameters should be placed on the top and inside of the pipe group.
8 When multiple porous plastic pipes form a pipe group, grid pipes, honeycomb pipes or plum blossom pipes should be selected.
9 One type of perforated pipe should be selected for the same pipe group combination, but it can be combined with solid wall, corrugated plastic single-hole pipe or cement pipe.
10 Within 2m before entering the man (hand) hole, a gap of 40mm to 50mm should be left between porous pipes, and a gap of 15mm to 20mm should be left between single-hole solid wall pipes and corrugated pipes, and all gaps should be filled in layers.
11 The pipe position between two adjacent manholes (hands) should be consistent, and the section of the pipe group should meet the design requirements.
12 The remaining length of the silicon core tube port in the man (hand) hole should not be less than 400mm.
13 The connection of plastic pipes shall meet the following requirements.
1) The connection between plastic pipes should adopt sleeve connection, socket connection, socket elastic sealing ring connection and mechanical compression pipe fitting connection;
2) The socket of the porous plastic pipe and the inside and outside of the plug should be evenly coated with a special neutral adhesive, and the minimum viscosity should not be less than 500MPa·s. When the plastic pipe is connected, it should be inserted in place and squeezed to fix it;
3) The interface of each plastic pipe should be staggered;
4) The marking surface of the plastic pipe should be on the top;
5) The grid plastic pipe group should be bound once with a special belt at an interval of about 3m, and other pipes such as honeycomb pipes should be arranged and fixed with special brackets;
6) The vertical joint between two rows of plastic pipes should be filled with M10 cement mortar, and the fullness should not be less than 90%.
14 The connection of steel pipes shall adopt casing connection.
15 Warning signs should be added 300mm above the pipe group.
16 When the plastic pipe is not laid underground, protective measures such as anti-aging and mechanical damage should be taken.
9.0.3 The laying of cement pipes shall comply with the following regulations.
1 In areas with good soil quality, after the trench is dug, the bottom of the trench should be compacted to make a concrete foundation;
2 In areas with poor soil quality, the reinforced concrete foundation should be made after the trench is dug;
3 In areas where the soil is rocky, the bottom of the pipeline trench should be flat;
4.The pipe group combination should take 6-hole pipe block as a unit;
5.The connection of cement pipe blocks should be connected by grouting flat joints.
9.0.4 Horizontal directional drilling or other non-excavation methods should be used for road sections that are not suitable for excavation, and trenches or bridge fixation should be used for laying on bridges.
10 man (hand) hole settings
10.0.1 The specification and program of manholes (hands) shall comply with the relevant provisions of the current industry standard "Atlas of Manholes and Handholes for Communication Pipelines" YD/T 5178, and the load and strength of non-standard manholes (hands) shall be Meet the design requirements.
10.0.2 The location of man (hand) holes shall be set in accordance with the following regulations.
1 The manhole (hand) hole should be set at the branch point of the optical (electrical) cable, the junction point of the upper optical (electrical) cable, the corner of the pipeline with a steep slope, the intersection of the road or the building next to the proposed underground lead-in line;
2 The location of the man (hand) hole at the intersection should be on the sidewalk or the green belt;
3 The position of the manhole (hand) hole should be kept at a distance from other adjacent pipelines and tube wells, and should be staggered from each other;
4.Manholes (hands) should not be located in building access passages, cargo yards, low-lying water accumulations, and places with unstable foundations;
5 When communication pipelines cross railways and wider roads, manholes (hands) shall be provided on both sides.
10.0.3 The manhole (hand) hole type should be determined according to the final pipe hole capacity. Man (hand) hole models can be selected according to Table 10.0.3.
Table 10.0.3 Contrast table for selection of commonly used tube hole capacity and standard man (hand) hole model
Note. "Below" in the table includes itself, and "above" does not include itself.
10.0.4 Man (hand) hole type can be selected according to the provisions in Table 10.0.4.
Table 10.0.4 Man (hand) hole type list
10.0.5 For areas with a high groundwater level, manhole (hand) hole structures shall be waterproofed.
10.0.6 Manholes (hands) shall be based on concrete. When the soil is soft or the groundwater level is high, ballast cushions shall be added and reinforced concrete shall be used.
10.0.7 According to the groundwater level, the architectural program of manholes (hands) can be determined according to the provisions in Table 10.0.7.
Table 10.0.7 Architectural formula for man (hand) hole
10.0.8 Manhole (hand) manhole covers should have anti-theft, anti-slip, anti-drop, anti-displacement, anti-noise and other measures, and there should be obvious signs of use and property rights on the manhole cover.
11 optical (electrical) cable channel
11.0.1 When encountering the following situations, the building optical (electrical) cable channel may be considered.
1 Create a new large-capacity communication office (station) outgoing (station) section;
2 The communication pipeline passes through urban main streets, expressways, railways and other areas where it is difficult to expand the pipeline in the future and the pipeline capacity is large;
3 Other road sections that need to build optical (electrical) cable channels.
11.0.2 The size and buried depth of optical (electrical) cable channels shall meet the following requirements.
1 The width should be 1.4m ~ 1.6m, and the clear height should not be less than 1.8m;
2 The buried depth (from the top of the channel to the road surface) shall not be less than 0.3m.
11.0.3 Optical (electrical) cable channel can adopt concrete foundation or reinforced concrete foundation according to soil conditions.
11.0.4 The optical (electrical) cable channel building shall take effective drainage, lighting, ventilation and water leakage prevention measures.
12 Design of optical (electrical) cable entry room
12.0.1 The communication bureau shall set up a dedicated optical (electrical) cable entry room.
12.0.2 The design of the optical (electrical) cable entry room shall meet the following requirements,
1.The location of the incoming line room in the building should be convenient for optical (electrical) cables to enter the bureau (station), and at least two incoming lines in different directions should be set;
2.The size of the incoming line room should be designed according to the capacity of the terminal (station), and the capacity of the pipeline (station) or the size of the channel should also be designed according to the capacity of the terminal (station);
3.The construction method of the incoming line room in the building should preferably adopt the semi-underground construction method;
4 The incoming line room should be close to the outer wall;
5.The net height and area of the incoming room shall meet the requirements of capacity and workmanship;
6 The layout of the cable entry room should be convenient for construction and maintenance, and it should be convenient for cable entry from all directions, and should meet the technical requirements for the bending radius of optical (electrical) cables.
12.0.3 The construction of optical (electrical) cable entry room shall meet the following requirements,
1 There should not be protruding beams and columns in the incoming line room;
2 When the passage of gas pipelines is prohibited in the cable inlet room, other pipelines should not pass through; when a heat supply pipe passes through the cable inlet room, protective measures shall be taken, and the arrangement and laying of optical (electrical) cables shall not be affected; the cable inlet room shall not be used as a walkways leading to other basements;
3 When the pipeline entering the station (station) passes through the load-bearing wall of the building, it shall be separated from the building structure, and the pipeline shall not bear the pressure of the load-bearing wall;
4 The building structure of the incoming line room shall be waterproof and shall not leak water; effective blocking measures shall be taken for all the idle pipe holes at the inlet of the incoming station (station) and the pipe holes for which the optical (electrical) cables have been passed; Water retaining walls or water storage tanks shall be set near the entrance of the incoming bureau (station) pipeline in the incoming line room; facilities for pumping and drainage shall be provided in the incoming line room;
5.The cable entrance room should have fireproof performance, and a fireproof iron door should be used. The door should open outward, and the width should not be less than 1000mm;
6 The wire inlet room should be provided with upper wire slots or upper wire holes (holes);
7 The positions of holes and slots reserved in the incoming line room should be accurate, the walls and ceiling should be plastered and painted, and the ground surface should be smoothed;
8.Ventilation devices against harmful gases should be installed in the wire inlet room, and the exhaust air volume should be calculated according to the volume of not less than five times per hour.
12.0.4 There should be lighting in the incoming room. In addition to common AC lighting and guarantee lighting systems, emergency lighting should also be installed. The lighting should take moisture-proof and explosion-proof measures. Two kinds of AC lights should be arranged alternately. A moisture-proof power socket should be installed, and the socket should be higher than 1400mm from the ground. All light switches and sockets should use concealed wires. All lighting switches shall be located at the entrance of the incoming room.
12.0.5 The ground wire should be installed in the incoming line room.
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