Comprehensive planning standard for urban engineering pipelines

Regarding the requirements for issuing the national standard “Code for Comprehensive Planning of Urban Engineering Pipelines” and notifying Genju State Planning Commission of the “Project Construction Standards Formulation and Revision Plan in 1992” (Ji Zong [1992] No. 490 Annex II), our Ministry The “Code for Comprehensive Planning of Urban Engineering Pipelines” formulated by the organization was approved by relevant departments as a mandatory national standard, numbered GB50289-98, and came into effect on May 1, 1999. This code is managed by our Ministry, Shenyang Planning and Design Research Institute is responsible for the specific interpretation work, and the China Construction Industry Press organized by the Standards and Rating Research Institute of the Ministry of Construction to publish and distribute. The Ministry of Construction of the People’s Republic of China 1 General Provisions 1.0.1 In order to rationally use urban land, make overall arrangements for the location of engineering pipelines in the city’s ground and underground space, coordinate the relationship between engineering pipelines and between urban engineering pipelines and other projects. The planning and design of engineering pipelines and planning management provide the basis for formulating this specification. 1.0.2 This code is applicable to the overall planning of the city (combined zone planning) and the comprehensive planning of engineering pipelines in the detailed planning stage. 1.0.3 The main content of the comprehensive planning of urban engineering pipelines includes: determining the arrangement sequence of urban engineering pipelines when laying underground, and determining the minimum horizontal net distance and minimum vertical net distance between the engineering pipelines; determining the minimum soil covering for urban engineering pipelines laying underground Depth; determine the minimum horizontal and minimum vertical clear distances between the pipelines and poles when laying urban engineering pipelines overhead and the surrounding buildings (structures), roads, and adjacent engineering pipelines. 1.0.4 The comprehensive planning of urban engineering pipelines should pay attention to the short-term construction planning, and should consider the needs of long-term development. 1.0.5 The comprehensive planning of urban engineering pipelines should be rationally arranged in accordance with the development of the city, and make full use of the urban above-ground and underground space. 1.0.6 The comprehensive planning of urban engineering pipelines should be coordinated with professional planning such as urban road traffic, urban residential areas, urban environment, water supply engineering, drainage engineering, thermal engineering, power engineering, gas engineering, telecommunications engineering, flood control engineering, and civil air defense engineering. 1.0.7 In addition to the implementation of this code, the comprehensive planning of urban engineering pipelines should also comply with the current relevant national standards and regulations. 2 Underground laying 2.1 To general regulations 2.1.1 Urban engineering pipelines should be laid underground. 2.1.2 The plane position and vertical position of the engineering pipeline should adopt the unified coordinate system and elevation system of the city. 2.1. 3 The comprehensive planning of engineering pipelines shall meet the following requirements: 2.3.1 The urban road network planning shall be combined to make the lines short and short without hindering the normal operation, maintenance and reasonable land occupation of the engineering pipelines. 2.3.1.2 The existing engineering pipelines shall be fully utilized. When the existing engineering pipeline cannot meet the needs, it can be discarded or pumped after comprehensive technical and economic comparison. 2.1.3.3 Plain cities should avoid soft soil areas, seismic fault zones, subsidence areas, and unfavorable areas with high groundwater levels; in mountainous cities with large ups and downs, the location of engineering pipelines should be rationally arranged based on the characteristics of the urban topography, and should be avoided. Landslide danger zone and flood peak mouth. 2.1.3.4 The layout of engineering pipelines should be coordinated with the current city status and planned underground railways, underground passages, civil air defense projects and other underground concealed projects. 2.1.4 When compiling the comprehensive planning and design of engineering pipelines, the intersection of pipelines at road intersections should be reduced. When there is a contradiction in the vertical position of the engineering pipeline, the following rules should be followed. 2.1.4.1 Pressure pipelines should be gravity flow pipelines; 2.1.4.2 Flexible pipelines should be non-flexible pipelines; 2.1.4.3 Branch pipelines should be main pipelines; 2.1.4.4 Small pipes Diameter pipelines allow large diameter pipelines. 2.2 Directly buried laying 2.2.1 Water supply, drainage, gas and other engineering pipelines in severe cold or cold areas should be based on the depth of soil freezing to determine the depth of pipeline covering; engineering pipelines for heating, telecommunications, power cables and other engineering pipelines in places other than severe cold or cold areas The soil covering depth of the pipeline should be determined according to the nature of the soil and the size of the load on the ground. 2.2.2 The planned location of the pipeline under the road should be arranged under the sidewalk or non-motorized vehicle lane. Engineering pipelines such as telecommunication cables, water supply, gas transmission, sewage and rainwater drainage can be arranged under non-motor vehicle lanes or motor vehicle lanes. 2.2.3 The planned position of the engineering pipeline under the road should be relatively fixed. The order of parallel arrangement from the red line of the road to the direction of the center line of the road shall be determined according to the nature of the engineering pipeline and the depth of embedment. Engineering pipelines with few branch lines, deep burying, short maintenance period, combustible, combustible, and damage to the foundation safety of the building should be far away from the building. The arrangement sequence should be: power cable, telecommunications cable, gas distribution, water distribution, thermal trunk line, gas transmission, water supply, rainwater drainage, sewage drainage. 2.2. 4 The sequence of the parallel arrangement of engineering pipelines in the outer direction of the building line in the courtyard should be determined according to the nature of the engineering pipeline and the depth of burial. The arrangement sequence should be: electricity, telecommunications, sewage and drainage, gas, water supply, and heat. When the gas pipeline can meet the requirements on either side of the building, the gas pipeline should be arranged on the side with fewer pipelines. 2.2.5 The engineering pipeline planned along the urban road should be parallel to the center line of the road, and its main line should be close to the side with many branch pipelines, and the engineering pipeline should not be transferred from one side of the road to the other. Urban arterial roads with a road red line width exceeding the measured m should be arranged on both sides of water supply and gas distribution pipelines; urban arterial roads with a road red line width exceeding 50 m should be arranged with drainage pipelines on both sides of the road. 2.2.6 All kinds of engineering pipelines should not be overlapped and laid directly in the vertical direction. 2.2.7 Engineering pipelines laid along railways and highways should be parallel to railways and highways. When engineering pipelines cross railways and highways, they should be arranged vertically; subject to conditions, they can be arranged obliquely and the minimum crossing angle should be greater than 3 mines. 2.2.8 The engineering pipeline laid at the bottom of the river should be selected in a stable river section, and the burying depth should be determined in accordance with the principle of not obstructing the improvement of the river course and the safety of the pipeline. When laying engineering pipelines under a river course, the following requirements shall be met: 2.2.8.1 When laying under a first to fifth level channel, the design elevation of the channel bottom should be less than 2m; 2.2.8.2 Laying under other river channels should be below the design elevation of the river bottom; 2.2.8.3 When laying under the irrigation canal, the designed elevation of the canal bottom should be less than 0.5m. 2.2.9 The minimum horizontal clear distance between pipelines and buildings (structures) should meet the requirements of Table 2.2.9. When it is difficult to meet the requirements due to factors such as road width, cross-section and the location of existing engineering pipelines, the minimum horizontal clear distance can be reduced after taking safety measures according to the actual situation. 2.2.10 For engineering pipelines with a buried depth greater than the foundation of the building (structure), the minimum horizontal distance between the building (structure) and the building (structure) shall be calculated according to the following formula, which is converted into a horizontal clear distance and compared to Table 2.2. The value of 9 is compared, and the larger value is used. L=(H—h)a+ Tgd 2 where L——the horizontal distance from the center of the pipeline to the foundation edge of the building (structure) (m); H——the laying depth of the pipeline (m); h——the building (structure) Masonry depth of the bottom of the material foundation (m); a——the width of the excavated pipe (m); d——the friction angle of the soil (o). 2.2.11 When engineering pipelines are laid across, the sequence from the ground surface down should be: power pipelines, heating pipelines, gas pipelines, water supply pipelines, rainwater drainage pipelines, sewage drainage pipelines. 2.2.12 The elevation of the engineering pipeline at the intersection should be determined according to the elevation of the drainage pipeline. 2.3 Laying of integrated trenches 2.3.1 In one of the following situations, the engineering pipelines should be laid in integrated trenches. 2.3.1.1 Motor vehicle lanes with heavy traffic or more engineering pipeline facilities, urban arterial roads, and engineering sections that cooperate with the construction of subways, interchanges, etc. 2.3.1.2 Sections of roads that are not suitable for excavation. 2.3.1.3 The intersection of squares or main roads. 2.3.1.4 Roads where two or more engineering pipelines and multi-circuit cables need to be laid at the same time. 2.3.1.5 The intersection of road and railway or river. 2.3.1.6 The width of the road is difficult to meet the requirements of the sections where multiple pipelines are laid directly. 2.3.2 Directly lay telecommunications cable pipelines, low-voltage distribution cable pipelines, water supply pipelines, heating pipelines, and sewage and rainwater drainage pipelines in the integrated pipe trench. 2.3.3 The engineering pipelines that avoid mutual interference in the integrated pipe trench can be installed in the same small room of the pipe trench; the engineering pipelines that interfere with each other should be installed in different small rooms of the pipe trench respectively. Telecommunications cable pipelines and high-voltage power transmission cable pipelines must be arranged separately; water supply pipelines and drainage pipelines can be arranged on one side of the integrated pipe trench, and the drainage pipelines should be arranged at the bottom of the integrated pipe trench. 2.3.4 The laying of integrated pipe trenches for the trunk line of the engineering pipeline should be set under the motor vehicle lane, and the depth of soil covering should be determined comprehensively according to factors such as road construction, traffic load, structural strength of the integrated trench, and local freezing depth; The integrated pipe trench should be set under the sidewalk or non-motorized vehicle lane, and its burying depth should be determined comprehensively according to the structural strength of the integrated pipe trench and the local freezing depth and other factors. 3 Overhead laying 3.0. 1 In the urban planning area, the overhead laying of engineering pipelines along fences, river embankments, building (structure) walls and other areas that do not affect the urban landscape should be combined with the detailed urban planning of the areas through which the engineering pipelines pass. 3.0.2 The location of engineering pipelines laid overhead along urban roads should be determined according to the cross-section of the planned road, and the smooth flow of traffic, the safety of residents, and the normal operation of engineering pipelines should be guaranteed. 3.0.3 Overhead line poles should be arranged on the sidewalk no more than 1m away from the curb; on roads with sub-vehicles, overhead line poles should be arranged in the sub-vehicles. 3.0.4 The overhead power lines and telecommunication overhead lines should be erected on both sides of the road respectively, and on the same side as the underground cables of the same type. 3.0.5 The pipelines of the same nature should be erected together with poles. 3.0.6 Overhead heating pipelines should not be laid cross-laid with overhead transmission lines and debt wires of electrified railways. When it is necessary to cross, protective measures should be taken. 3.0.7 When engineering pipelines cross rivers, pipeline bridges or traffic bridges should be used for erection, and the following requirements should be met: 3.0.7.1 Combustible and combustible engineering pipelines should not use traffic bridges to cross rivers. 3.0.7.2 When the engineering pipeline uses a bridge to cross the river, its planning and design should be combined with the bridge design. 3.0.8 The minimum horizontal clear distance between overhead pipelines and buildings (structures) should meet the requirements of Table 3.0.8. 2 When engineering pipelines use bridges to cross rivers, their planning and design should be combined with bridge design. 3.0.8 The minimum horizontal clear distance between overhead pipelines and buildings (structures) should meet the requirements of Table 3.0.8. 2 When engineering pipelines use bridges to cross rivers, their planning and design should be combined with bridge design. 3.0.8 The minimum horizontal clear distance between overhead pipelines and buildings (structures) should meet the requirements of Table 3.0.8.   

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