TB/T 2897-1998 PDF EnglishUS$120.00 · In stock · Download in 9 seconds
TB/T 2897-1998: Sub-ballast on railway gravel ballast bed Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsTB/T 2897-1998: Sub-ballast on railway gravel ballast bed---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/TBT2897-1998TB PROFESSIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Sub-ballast for ballast bed of railways Issued on. FEBRUARY 24, 1998 Implemented on. SEPTEMBER 1, 1998 Issued by. Ministry of Railways of the People’s Republic of China Table of ContentsForeword... 3 1 Scope... 4 2 References... 4 3 Terms... 4 4 Technical requirements... 4 5 Inspection rules... 6 6 Transportation, storage... 8ForewordSub-ballast is an important part of the ballast bed of railways and is located between the ballast layer of the ballast bed and the surface layer of the subgrade bed. It plays the role of transmitting and distributing the train loads, preventing mutual penetration of top-ballast and surface layer particles of subgrade bed, water seepage transition and antifreeze-and-insulation. In the past, China borrowed the experience of using river sands as sub-ballast from the former Soviet Union. Since there is no material standard, the above-mentioned functions of the sub-ballast cannot be guaranteed and the material source of the sub-ballast is limited. On the basis of reference to the relevant standards such as the sub-ballast material standards of the United States Railway Engineering Association (AREA), Japan railway subgrade bed surface layer (JISA5001 particle size transitional gravel layer) material standards, combining China's national conditions and railway situation, this Standard is developed. This Standard is proposed by Railway Engineering Research Institute of China Academy of Railway Sciences. This Standard is under the jurisdiction of Institute of Standard Metrology of National Railway Administration of the People’s Republic of China. Railway Engineering Research Institute of China Academy of Railway Sciences is responsible for the drafting of this Standard. Main drafters of this Standard. Zeng Shugu, Zhang Wensheng, Xu Yongxian, Wang Hong, Liu Zengjie. Sub-ballast for ballast bed of railways1 ScopeThis Standard specifies the technical requirements, inspection rules and transportation, storage of sub-ballast for ballast bed of railways (hereinafter referred to as sub-ballast). This Standard applies to national railways; local railways and industrial enterprise railways may also refer to this Standard.2 ReferencesThe following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. TB/T 2140-90 Railway ballast TB/T 2328.1~18-92 Test method for railway ballast3 TermsThe plasticity index Ip. the plasticity index is equal to the difference between the liquid limit LL and the plastic limit PL.4 Technical requirements4.1 Sub-ballast material may be taken from natural gravel material, or may be taken from rocks or natural pebbles, gravels by crushing, screening. 4.3 The mass percentage of particles with broken surface in coarse particles with a particle size greater than 16 mm is not less than 30 %. 4.4 Properties of sub-ballast material 4.4.1 The Los Angeles abrasion ratio of aggregates with a particle size greater than 1.7 mm is not more than 50 %.5 Inspection rulesSub-ballast material shall be subjected to type inspection and production inspection. The type inspection is a ministerial level, and the production inspection is a bureau level. 5.1 Type inspection 5.2 Production inspection 5.2.2 According to the requirements of 4.2 to 4.4, the production organization carries out an inspection when every 4 × 104 m3 of sub-ballast are produced. If the annual output is less than 4 × 104 m3, the inspection shall be carried out once a year. 5.3 Test methods 5.3.1 The Los Angeles abrasion ratio test shall be in accordance with TB/T 2328.1. 5.3.2 The sodium sulfate solution soaking loss test shall be in accordance with TB/T 2328.10. 5.3.3 The liquid limit and plasticity index test shall be in accordance with TB/T 2328.8 and TB/T 2328.9. 5.3.4 The granular soil and other impurities content test shall be in accordance with TB/T 2328.17.6 Transportation, storage6.1 In the stockpile site, it shall prevent the infiltration of clay, debris and dust, and ensure that the sub-ballasts are clean. When shoveling, it shall prevent the shoveling of soil. TB/T 2897-1998 TB PROFESSIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Sub-ballast for ballast bed of railways Issued on. FEBRUARY 24, 1998 Implemented on. SEPTEMBER 1, 1998 Issued by. Ministry of Railways of the People’s Republic of ChinaTable of ContentsForeword... 3 1 Scope... 4 2 References... 4 3 Terms... 4 4 Technical requirements... 4 5 Inspection rules... 6 6 Transportation, storage... 8ForewordSub-ballast is an important part of the ballast bed of railways and is located between the ballast layer of the ballast bed and the surface layer of the subgrade bed. It plays the role of transmitting and distributing the train loads, preventing mutual penetration of top-ballast and surface layer particles of subgrade bed, water seepage transition and antifreeze-and-insulation. In the past, China borrowed the experience of using river sands as sub-ballast from the former Soviet Union. Since there is no material standard, the above-mentioned functions of the sub-ballast cannot be guaranteed and the material source of the sub-ballast is limited. On the basis of reference to the relevant standards such as the sub-ballast material standards of the United States Railway Engineering Association (AREA), Japan railway subgrade bed surface layer (JISA5001 particle size transitional gravel layer) material standards, combining China's national conditions and railway situation, this Standard is developed. This Standard is proposed by Railway Engineering Research Institute of China Academy of Railway Sciences. This Standard is under the jurisdiction of Institute of Standard Metrology of National Railway Administration of the People’s Republic of China. Railway Engineering Research Institute of China Academy of Railway Sciences is responsible for the drafting of this Standard. Main drafters of this Standard. Zeng Shugu, Zhang Wensheng, Xu Yongxian, Wang Hong, Liu Zengjie. Sub-ballast for ballast bed of railways1 ScopeThis Standard specifies the technical requirements, inspection rules and transportation, storage of sub-ballast for ballast bed of railways (hereinafter referred to as sub-ballast). This Standard applies to national railways; local railways and industrial enterprise railways may also refer to this Standard.2 ReferencesThe following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. TB/T 2140-90 Railway ballast TB/T 2328.1~18-92 Test method for railway ballast3 TermsThe plasticity index Ip. the plasticity index is equal to the difference between the liquid limit LL and the plastic limit PL.4 Technical requirements4.1 Sub-ballast material may be taken from natural gravel material, or may be taken from rocks or natural pebbles, gravels by crushing, screening. 4.3 The mass percentage of particles with broken surface in coarse particles with a particle size greater than 16 mm is not less than 30 %. 4.4 Properties of sub-ballast material 4.4.1 The Los Angeles abrasion ratio of aggregates with a particle size greater than 1.7 mm is not more than 50 %.5 Inspection rulesSub-ballast material shall be subjected to type inspection and production inspection. The type inspection is a ministerial level, and the production inspection is a bureau level. 5.1 Type inspection 5.2 Production inspection 5.2.2 According to the requirements of 4.2 to 4.4, the production organization carries out an inspection when every 4 × 104 m3 of sub-ballast are produced. If the annual output is less than 4 × 104 m3, the inspection shall be carried out once a year. 5.3 Test methods 5.3.1 The Los Angeles abrasion ratio test shall be in accordance with TB/T 2328.1. 5.3.2 The sodium sulfate solution soaking loss test shall be in accordance with TB/T 2328.10. 5.3.3 The liquid limit and plasticity index test shall be in accordance with TB/T 2328.8 and TB/T 2328.9. 5.3.4 The granular soil and other impurities content test shall be in accordance with TB/T 2328.17.6 Transportation, storage6.1 In the stockpile site, it shall prevent the infiltration of clay, debris and dust, and ensure that the sub-ballasts are clean. When shoveling, it shall prevent the shoveling of soil. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of TB/T 2897-1998 be delivered?Answer: The full copy PDF of English version of TB/T 2897-1998 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of TB/T 2897-1998_English with my colleagues?Answer: Yes. The purchased PDF of TB/T 2897-1998_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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