|
|
||||||||||||||||||
JTGD20-2017 PDF EnglishUS$2205.00 · In stock · Download in 9 seconds
JTGD20-2017: Design Specification for Highway Alignment Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid JTGD20: Evolution and historical versions
Basic dataStandard ID: JTG D20-2017 (JTGD20-2017)Description (Translated English): Design Specification for Highway Alignment Sector / Industry: Highway & Transportation Industry Standard Classification of Chinese Standard: P66 Classification of International Standard: 93.080 Word Count Estimation: 103,141 Date of Issue: 2017-09-28 Date of Implementation: 2018-01-01 Older Standard (superseded by this standard): JTG D20-2006 Regulation (derived from): Ministry of Transport Announcement 2017 No. 38 Issuing agency(ies): Ministry of Transport Summary: This standard is applicable to new and modified highway design. Excerpted PDFsFull copy of true-PDF will be delivered in 9 seconds upon purchase: JTGD20-2017Similar standardsCJJ/T 135 CFDA 123 JTG G10JTGD20-2017: Design Specification for Highway Alignment---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JTGD20-2017JTG INDUSTRIAL STANDARD OF THE PEOPLE��S REPUBLIC OF CHINA Design specification for highway alignment Issued on. SEPTEMBER 28, 2017 Implemented on. JANUARY 01, 2018 Issued by. Ministry of Transport of PRC INDUSTRIAL STANDARD OF THE PEOPLE��S REPUBLIC OF CHINA Design specification for highway alignment Main drafting organization. CCCC First Highway Survey, Design and Research Institute Co., Ltd. Approval department. Ministry of Transport of the People's Republic of China Implementation date. January 01, 2018 People's Communications Press Co., Ltd Announcement of the Ministry of Transport of the People's Republic of China No.38 Table of ContentsForeword... 7 1 General... 9 2 Highway classification and class selection... 11 3 Highway traffic capacity... 16 4 Overall design... 26 5 Route selection... 33 6 Lateral section of highway... 36 7 Highway plane... 50 8 Longitudinal section of highway... 62 9 Alignment design... 70 10 Level crossing between highway and highway... 82 11 Level crossing between highway and highway... 95 12 Crossing between highways and railways, country roads, pipelines... 120 13 Facilities along the highway... 130 Explanation of terms used in this specification... 1391 General1.0.1 In order to guide highway design, reasonably determine highway's functions, technical classes, construction scale, main technical indicators, this specification is hereby formulated. 1.0.2 This specification is applicable to the design of newly constructed, reconstructed, expanded highways. 1.0.3 For the highway design, it shall determine the highway function, through comprehensive analysis, based on regional characteristics, traffic characteristics, highway network structure. It shall be based on the highway functions, combining the traffic capacity and terrain conditions, etc., to select technical grades and main technical indicators. 1.0.4 All classes of highways shall be subject to overall design. The overall design shall run through all stages of the highway construction project, from the feasibility study to the construction drawing design; cover all relevant disciplines of the highway construction project. 1.0.5 For the highway design, it shall be based on highway functions, use tasks, roles in the highway network, comprehensively consider multiple transportation modes, such as railways, waterways, aviation, pipelines, etc., as well as the relationship between highways and cities & towns, farmland planning, to implement the comprehensive transport development requirements, AND reasonably demonstrate and determine the route direction and corridor belt. 1.0.6 For the alignment plan, it shall, based on the selected corridor belt AND the main control points, carry out the layout and overall design, to rationally use the technical indicators. The feasible alignment plan shall be compared and selected, to determine the design plan. When different design speeds, technical indicators or design plans have obvious impacts on operational safety, engineering cost, natural environment, social and economic benefits, etc., THEN, it shall carry out the technical and economic demonstrations, of the same depth. 1.0.7 For the line position of the alignment, it shall make full investigation on the engineering geology, hydrogeology, meteorological conditions, natural disasters, highway construction materials, ecological environment, natural landscapes, etc., according to the topography and ground conditions. It shall be selected based on the study of regional climate characteristics, along the route. Meanwhile, it shall choose the main horizontal and vertical technical indicators. 1.0.8 For the alignment design, it must implement the basic national policy of strengthening environmental protection and rational use of land resources. In the process of determining the design of the structure form and layout of the artificial structures, such as roadbeds, pavements, bridges, tunnels, crossings, traffic engineering, facilities along the line, as well as the soil borrowing & disposal yard and land acquisition, it shall reduce the impact of highway construction, on the ecological environment along the route. Meanwhile, it shall combine the greening OR take corresponding engineering measures, to coordinate and improve the coordination, BETWEEN the artificial structures AND natural landscapes along the route, thereby improving the environmental quality of the highway. 1.0.9 The alignment of highway shall be designed, according to the design speed. It shall use the running speed for inspection; maintain linear continuity. It shall comprehensively coordinate the relationship between the highway plane, longitudinal section, lateral section, so that the plane is smooth and suitable, the longitudinal section is balanced, the lateral section is reasonable. 1.0.10 For the expressways, primary highways, secondary arterial highways, they shall be evaluated for traffic safety during design. For other highways, it may also carry out evaluation of traffic safety, when conditions permit. 1.0.11 When the highway adopts the phased construction plan, the overall design must follow the principles of overall planning and phased implementation, so that the early-phase projects can still be fully utilized in the later phase; meanwhile, there is room for the construction of later projects AND to create favorable conditions. 1.0.12 When the highway is reconstructed and expanded, it shall carry out demonstration and comparison-selection, for the reconstruction and expansion plan AND the partial new construction plan. When adopting the reconstruction and expansion plan, it shall follow the principle of combining utilization and reconstruction, to utilize the original project reasonably and fully. 1.0.13 In addition to complying with the provisions of this specification, the highway design shall also comply with the current relevant national and industry standards.2 Highway classification and class selection2.1 Highway functions and classification 2.1.1 Highways are classified, according to the traffic functions, into arterial highways, distribution highways, branch highways. Arterial highways are divided into primary arterial highways and secondary arterial highways. Distribution highways are divided into primary distribution highways and secondary distribution highways. 2.1.2 Highways are classified into five technical classes. expressways, first- class highways, second-class highways, third-class highways, fourth-class highways, according to traffic characteristics and ability to control interference. 2.2 Technical class of highway and selection of design speed 2.2.1 The traffic volume forecast for highway design shall meet the following requirements.3 Highway traffic capacity3.1 General requirements 3.1.1 For the highway design, it shall carry out analysis and evaluation of traffic capacity and service level, so that the service level is balanced and coordinated; meanwhile it shall meet the following requirements. 3.1.2 For the analysis and evaluation of the capacity and service level of expressways and first-class highways, it shall be carried out in different directions. For the second-class and third-class highways, it shall be carried out according to the two-way overall traffic flow. For the continuous uphill segments of third-class and above highways, they shall be subject to the analysis and evaluation, separately, of the traffic capacity and service level. 3.2 Service level 3.2.1 For the designed service level of highway, it shall be reasonably selected, according to highway function, technical level, topographical conditions, etc., which shall not be lower than the provisions in Table 3.2.1. 3.3 Designed hourly traffic volume 3.3.1 The designed hourly traffic volume of the highway should be the 30th hour traffic volume of the year; it may also, according to the change characteristics of the hourly traffic volume of local highway, use the traffic volume of the most economical and reasonable time, between the 20th and 40th hour of the year. 3.3.2 The designed hourly traffic volume (DDHV) of expressways and first-class highways shall be calculated according to formula (3.3.2).4 Overall design4.1 General provisions 4.1.1 The overall design shall demonstrate and determine the highway function, technical standards, construction scale, construction plan. 4.2 Highway functions and technical standards 4.2.1 It shall, based on national and regional highway network structure and planning, regional characteristics, traffic characteristics, construction goals, comprehensively analyze the position and role of highways in the highway network; demonstrate and determine the functions of highways. 4.3 Construction scale and construction plan 4.3.1 It shall, based on highway network planning and highway functions, comprehensively consider the layout and planning of railways, waterways, aviation, pipelines and other integrated transportation systems, within the corridors belts of the route, the status quo and development plans of cities and industrial and mining enterprises, the development and utilization of natural resources. It shall determine, through study, the start and end points of the route, the main control points, the length of the route, the number of crossings, the configuration of management and service facilities, etc., to determine the scale of construction. 4.4 Environmental protection and resource conservation 4.4.1 It shall adhere to the principles of "Protection first, prevention as the mainstay, governance as the supplement, comprehensive management"; strictly implement the engineering construction project's environmental impact assessment, preparation of soil and water conservation plan, environmental protection ��three simultaneous�� system [translator's note. 4.4.2 It shall strengthen the comprehensive comparison-selection of route corridors and route plans; use the resource occupation such as land occupation, mineral overburden, as well as other environmental impacts such as high slope excavation and river occupation, as important indicators for plan selection; give priority to the plans, which have less resource occupation and little environmental impact. 4.5 Design inspection and safety evaluation 4.5.1 The highway design shall use the running speed method, to analyze and inspect the alignment design, geometric indicators, combination design of line shapes, to inspect the coordination and consistency of the running speed. 4.5.2 For the expressways, first-class highways, second-class arterial highways, it shall carry out the traffic safety evaluation, during design.5 Route selection5.0.1 Route selection shall include the whole process, of determining the basic direction of the route, the corridor zone of route, the route plan to the selected route position. 5.0.2 The route direction and the selection of main control points shall meet the following requirements. 5.0.4 Highway's route selection shall follow the following principles. 5.0.5 Highway's route selection shall meet the following requirements. 5.0.6 For the route selection of highway, it may adopt the method of alignment on paper or alignment on-site, which shall meet the following requirements.6 Lateral section of highway6.1 General provisions 6.1.1 The composition of the standard lateral section of highway roadbed shall meet the following requirements. 6.1.2 The form of lateral section of highway roadbed shall be determined, according to the conditions of highway function, technical level, traffic volume, topography, etc. Examples of forms of lateral section of general roadbed of highways, at all classes, are as shown in Figure 6.1.2-1 ~ Figure 6.1.2-4; meanwhile it shall meet the following requirements. 6.1.3 For the width of each component of the lateral section of the highway roadbed, it shall be determined comprehensively, according to the highway technical level, traffic volume, traffic composition, the function of each component of the lateral section. At the same time, it shall meet the following requirements. 6.3 Medial strip 6.3.1 For the integral roadbed section of expressways and first-class highways, it must be provided with a medial strip, which is composed of two left-side marginal strips AND a central separation zone. It shall meet the following requirements. 6.3.2 For the spacing between the separated roadbeds, it shall meet the needs of setting necessary drainage and safety protection facilities, meanwhile be compatible with the terrain and surrounding landscape. 6.5 Slope of road camber 6.5.1 For the integral roadbed of the expressway and the first-class highway, the road camber should adopt two-way road camber slope, which is inclined from the center of the highway to both sides. When located in an area with moderate rainfall, the slope of the road camber should be 2%. When located in an area with high rainfall, the slope of the road camber can be appropriately increased. 6.5.2 For the separated roadbed of the expressway and the first-class highway, the road camber should adopt one-way lateral slope, which is inclined to the outside of the roadbed, OR a two-way road camber slope. For snow-covered and frozen areas, it should adopt two-way road camber slope.7 Highway plane7.1 General provisions 7.1.1 The planar alignment of the highway is composed of three linear elements. straight-line, circular curve, transition curve. The highway's planar transition curve shall adopt the spiral line. 7.2 Straight-line 7.2.1 The length of the straight-line should not be too long. When a long straight-line is used, due to topographical conditions or other special conditions, it shall take corresponding technical measures, in light of the specific conditions along the route. 7.3 Circular curve 7.4 Spiral line 7.4.1 At the radial connection, BETWEEN the straight-line of expressways, first- class highways, second-class highways, third-class highways, AND the minimum radius of a circular curve, without superelevation, that is less than those in Table 7.4.1, it shall set a spiral line. 7.5 Superelevation of circular curve 7.5.1 When the radius of the circular curve is smaller than the minimum radius of the circular curve, which has not superelevation circular, as specified in Table 7.4.1, the superelevation shall be set on the curve AND meet the following requirements. 7.7 Superelevation and widened transitional segments of fourth-class highway 7.7.1 For the fourth-class highway, it may not set the spiral line, BUT be replaced by superelevation and widened transition segment. When the straight- line connects the circular curve, which has the minimum radius without superelevation in Table 7.4.1 AND is required to be widened as specified, it shall set the superelevation and widened transition segment. 7.7.2 For the superelevation and widening transition segment of the fourth-class highway, the length shall be calculated according to the relevant requirements of superelevation and widening, respectively, whichever is longer; however, the minimum length shall meet the requirements, that the gradient rate is 1.15 AND not less than 10 m.8 Longitudinal section of highway8.1 General provisions 8.1.1 The design elevation of the longitudinal section, that is, the design elevation of the roadbed, shall meet the following requirements. 8.1.2 The design flood frequency of the roadbed shall comply with the requirements in Table 8.1.2.It shall also comply with the following requirements. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |