NB/T 10237-2019Code for design of construction machinery and equipment selection for hydropower projects (English PDF)

Foreword

This document was issued on 4 November 2019 by the National Energy Administration of the PRC and takes effect on 1 May 2020.

It is a NB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 27.140, Chinese classification P 59.

It replaces DL/T 5133-2001, which is superseded.

In accordance with the requirements of the Notice of the National Energy Administration on Issuing the First Batch of Plans for the Formulation (Revision) of Industry Standards in the Energy Field in 2014 (Guo Neng Ke Ji [2014] No. 298), the code drafting group carried out extensive investigation and research, conscientiously summarized practical experience, referred to relevant advanced standards at home and abroad, and revised this code on the basis of a wide solicitation of opinions.

The main technical contents of this code are: selection and combination of construction machinery and equipment; drilling machinery; ground improvement and grouting machinery; bulldozing and loading machinery; transporting equipment; hoisting equipment; compacting machinery; engineering ships; construction auxiliary machinery; and dedicated construction machinery.

The main technical contents revised in this code are as follows:

— Terms have been added.

— Contents concerning engineering ships, construction auxiliary machinery and dedicated construction machinery have been added.

— The scope of application has been modified.

— The arrangement of the chapters of the code has been adjusted, the division being made according to the characteristics of the use of the construction machinery.

— Specific provisions on the combination of construction machinery and equipment have been supplemented.

This code is administered by the National Energy Administration. The General Institute of Hydropower and Water Resources Planning and Design proposed this code and is responsible for its routine administration. The Standardization Technical Committee for Hydropower Survey and Design of the Energy Industry is responsible for the interpretation of the specific technical contents.

Should any comment or suggestion arise in the course of implementation, it is requested that it be sent to the General Institute of Hydropower and Water Resources Planning and Design (address: No. 2 Liupukang Beixiaojie, Xicheng District, Beijing; postcode 100120).

Chief development organization of this code: PowerChina Huadong Engineering Corporation Limited.

Participating development organization of this code: Wuhan University.

Chief drafting staff of this code: Ren Jinming, Zou Zhi, Deng Yuan, Zhou Chuiyi, Li Jun, Chen Yonghong, Jin Zhenhong, Zeng Jianping, Qiu Yafeng, Wu Shijing, Song Fenglian, Hu Zhigen, Wang Ruigui, Zhang Hua.

Chief review staff of this code: Wei Zhiyuan, Chang Zuowei, Shi Qingchun, Li Jialiang, Wu Zhaoyue, Chen Nengping, Liu Zhihe, Luo Lin, Han Jianbo, Dai Zhenfeng, Ge Xiaobo, Zhou Shaohong, He Wei, He Xingyong, Xu Wentao, Piao Ling, Chun Guangkui, Li Shisheng.

Publication and Approval Information

Energy Industry Standard of the People's Republic of China. NB/T 10237-2019, Code for Design of Construction Machinery and Equipment Selection for Hydropower Projects. This code replaces DL/T 5133-2001.

Chief editing department: General Institute of Hydropower and Water Resources Planning and Design (China Renewable Energy Engineering Institute). Approving department: National Energy Administration. Date of entry into force: 1 May 2020.

Published and distributed by China Water & Power Press, Beijing, 2020. Classification on the cover: ICS 27.140; Chinese standard classification code P 59; issued 2019-11-04, implemented 2020-05-01.

Announcement of the National Energy Administration, 2019 No. 6: the National Energy Administration approved 384 energy industry standards headed by Technical Code for Electrical Prospecting of Hydropower Projects (Attachment 1), the English versions of 48 energy industry standards headed by Technical Guide for Rock-Filled Concrete Dams (Attachment 2), Amendment No. 1 to 7 energy industry standards headed by Technical Code for Environmental Impact Assessment of Wind Farm Projects (Attachment 3), and the abolition of 5 energy industry standards or plans headed by Charging Standard for Survey and Design of Wind Farm Projects (Attachment 4); these are hereby issued.

Attachments to the Announcement: 1. Catalogue of industry standards; 2. Catalogue of English versions of industry standards; 3. Notification sheet of amendments to industry standards; 4. Catalogue of abolished industry standards and plans. Signed by the National Energy Administration, 4 November 2019.

Attachment 1, Catalogue of Industry Standards, serial number 14: standard number NB/T 10237-2019; standard title Code for Design of Construction Machinery and Equipment Selection for Hydropower Projects; superseded standard DL/T 5133-2001; date of approval 2019-11-04; date of implementation 2020-05-01.

1 Scope

NB/T 10237-2019 governs how the construction plant for a hydropower project is selected at the design stage, replacing DL/T 5133-2001. On a large dam the choice of machinery is not a site decision taken later: the excavation method, the concrete placing system and the haulage fleet determine the construction schedule, the temporary works and a large part of the cost, so they are designed alongside the permanent works. The code sets the general provisions and defined terms, then the principles by which a fleet is chosen and combined - matching machine capacity to the peak monthly output required, balancing the units in a production chain so none starves the next, allowing for utilisation, availability and standby, and accounting for altitude, climate and haul distance. It then works through the machine families in turn: drilling equipment for surface and underground excavation, blasting and loading plant, excavators and loaders, haulage by truck and by belt conveyor, dozers, graders and compaction plant, rock drilling jumbos and tunnel boring machines, concrete batching, transport and placing systems including cable cranes, belt placers and tower cranes, grouting plant, dewatering and compressed air, and the lifting equipment used for permanent plant installation. For each it gives the selection parameters, the output calculation and the criteria for sizing the fleet. It applies to the design stages of hydropower projects in China.

1.0.1 This code is formulated in order to standardize the design of the selection of construction machinery and equipment within the construction organization design of hydropower projects.

1.0.2 This code is applicable to the design of the selection of construction machinery and equipment for hydropower projects.

1.0.3 The design of the selection of construction machinery and equipment for hydropower projects shall be combined with the specific conditions of the project, shall satisfy the requirements for the construction schedule, the construction intensity and the quality of the project, and shall achieve safety, applicability, environmental protection and energy conservation.

1.0.4 The design of the selection of construction machinery and equipment for hydropower projects shall comply not only with this code but also with the provisions of the relevant current national standards.

2 Terms

2.0.1 Construction machinery and equipment: the general designation of the machinery and the equipment used for the construction of a project.

2.0.2 Machine efficiency: the ratio of the production capacity actually attained by a machine under given conditions to its rated production capacity.

2.0.3 Equipment availability: the percentage of the number of items of machinery and equipment that are in good condition within a given period of time to the total number of items of that machinery and equipment.

3 Selection and Combination of Construction Machinery and Equipment

3.0.1 The design of the selection of construction machinery and equipment shall, in accordance with the requirements for the construction tasks, the schedule, the quality, the safety, the environmental protection and the energy conservation of the project, determine the types and the quantities of the main construction machinery required for the construction of the main structures of the hydropower project, together with the scheme for their combination.

3.0.2 The basis for the design of the selection of construction machinery and equipment should include the following contents:

3.0.2/1 The design results for the main structures and their construction technical schemes.

3.0.2/2 The quantities of the itemized works of the main structures, the construction period and the intensity indexes.

3.0.2/3 The requirements of the project owner with respect to the construction machinery and equipment.

3.0.3 The following data should be collected for the design of the selection of construction machinery and equipment:

3.0.3/1 The construction conditions and the traffic and transportation conditions of the project.

3.0.3/2 The energy supply conditions of the region in which the project is located.

3.0.3/3 The market supply conditions for construction machinery and equipment.

3.0.3/4 The requirements imposed by the environment of the project site upon the construction machinery, and the impact of the construction machinery upon the environment.

3.0.3/5 The technical data of the main items of construction machinery.

3.0.4 The selection of construction machinery and equipment shall follow the principles set out below:

3.0.4/1 Satisfying the construction tasks of the project and the design technical requirements.

3.0.4/2 Being adapted to the scale of the project and to the construction intensity.

3.0.4/3 Satisfying the requirements for the safe operation of the machinery and equipment.

3.0.4/4 Satisfying the requirements for environmental protection and energy conservation.

3.0.5 The selection of the types of construction machinery and equipment shall comply with the following requirements:

3.0.5/1 General-purpose construction machinery should be selected; where the construction conditions are specific, the selection of dedicated construction machinery may be considered.

3.0.5/2 Construction machinery of wide adaptability and easy to overhaul and maintain should be selected.

3.0.5/3 The construction machinery employed at the various construction locations shall be mutually coordinated.

3.0.5/4 For construction machinery of one and the same type, the number of models should not be excessive.

3.0.6 The selection of the quantity of construction machinery and equipment shall ensure the construction schedule of the works lying on the critical path.

3.0.7 The technical performance indexes of the construction machinery and equipment shall satisfy the construction requirements.

3.0.8 Methods such as project analogy, analysis of machine performance and quota analysis should be adopted for the selection of construction machinery and equipment and for their combination; for the selection of the main construction machinery of large hydropower projects, a comprehensive comparison and selection of construction schemes should be carried out; where dedicated construction machinery is to be adopted, a special demonstration may be carried out.

3.0.9 For the selection and the combination of the construction machinery and equipment of large hydropower projects, system simulation technology should be adopted in order to carry out the demonstration.

3.0.10 Construction machinery used in regions at an altitude above 2000.00 m shall satisfy the requirements of use under plateau environmental conditions. For construction at high altitude, construction machinery powered by internal combustion engines should be of the plateau type; where machinery not of the plateau type is adopted, the derating of the machinery shall be taken into account, and for altitudes from 5000.00 m to 2000.00 m the derating coefficient may be taken as 0.5 to 0.8.

3.0.11 When construction machinery and equipment are combined, the main construction machinery shall first be determined, the other construction machinery shall be matched with it, and a combination scheme involving fewer types of matching machinery and equipment should be selected.

3.0.12 The combination of construction machinery and equipment shall comply with the following provisions:

3.0.12/1 For open excavation of earth and rock works, the main construction machinery are the excavating and loading machinery, with which the transporting machinery shall be coordinated and matched.

3.0.12/2 For the excavation of tunnel works, the main construction machinery are the heading construction machinery, with which the loading and transporting machinery shall be coordinated and matched.

3.0.12/3 For ground improvement, the main construction machinery are the drilling and rock-drilling machinery and the hole-forming (trench-forming) machinery, with which the selected construction auxiliary machinery shall be coordinated and matched.

3.0.12/4 For filling and embankment works, the main construction machinery are the rolling and compacting machinery and the transporting machinery, with which the spreading and filling machinery shall be coordinated and matched.

3.0.12/5 For concrete construction, the main construction machinery are the machinery for placing the concrete into the blocks, with which the machinery for bin preparation, for levelling and vibrating and for curing shall be coordinated and matched.

3.0.13 The combination of construction machinery and equipment may be selected in accordance with the provisions of Appendix A of this code.

4 Drilling Machinery

4.0.1 Drilling and rock-drilling machinery may be used for the construction of blast holes, rock-bolt holes, anchor-cable holes, drainage holes and observation holes in earth and rock works and in underground works.

4.0.2 The drilling and rock-drilling machinery commonly used in hydropower projects may be selected from down-the-hole drills, hydraulic drills, geological drills, drill jumbos, anchoring drills, hand-held drills, air-leg drills and guide-rail drills, among others.

4.0.3 The type of drilling and rock-drilling machinery shall be selected on the basis of factors such as the construction environment, the properties of the rock and soil, the depth of the holes, the direction of the holes, the accuracy required, the diameter of the holes and the construction method.

4.0.4 In the construction of open excavation of earth and rock works, the type of drilling and rock-drilling machinery should be selected according to the following principles:

4.0.4/1 For bench blast holes and drainage holes where the excavation face is large or the terrain is flat, self-propelled hydraulic down-the-hole drills should be adopted.

4.0.4/2 Where the construction space is narrow, the excavation thickness and volume are small, the access is difficult, or the location is a high and steep slope, hand-held drills, air-leg drills and guide-rail drills may be adopted.

4.0.5 For the excavation construction of underground works, the drilling machinery shall be selected on the basis of factors such as the scale of the chamber, the construction scheme, the geological conditions and the construction safety, and shall comply with the following requirements:

4.0.5/1 For tunnel excavation, drill jumbos of the corresponding specification should be selected.

4.0.5/2 Where the cross section of the tunnel is small and its length is short, hand-held drills or air-leg drills may be selected.

4.0.5/3 For the lower-bench enlargement excavation of chambers of large cross section, self-propelled hydraulic down-the-hole drills may be selected.

4.0.6 For the construction of rock-bolt holes and drainage holes in underground works, rock-bolt jumbos, anchoring drills or drill jumbos should be selected for the work. For the construction machinery for rock-bolt holes and drainage holes in slope works, drill jumbos, hydraulic drills, anchoring drills or hand-held drills, among others, may be selected according to the construction conditions.

4.0.7 For anchor-cable holes, the anchoring drill shall be selected on the basis of factors such as the geological conditions, the design diameter and depth, and the working space of the drill. For anchor-cable holes subject to special geological conditions and design requirements, geological drills may be selected.

4.0.8 Where drilling and blasting are carried out in underwater rock works or in underwater concrete, a mobile drilling and blasting work boat should be selected for the operation. In shallow-water areas where the scale of the works is small, a fixed platform combined with drilling machinery may be selected for the construction.

4.0.9 For the excavation of high benches, drilling machinery of larger hole diameter should be selected; for foundation excavation, drilling machinery of small hole diameter should be selected; for drilling and blasting excavation near the protective layer or the design boundary line and for trench excavation, drilling machinery of smaller hole diameter shall be adopted so as to drill blast holes for small benches; and when approaching an inclined slope, drilling machinery capable of accurately controlling the direction of the holes shall be adopted.

4.0.10 The calculation for drilling and rock-drilling machinery may be carried out in accordance with the methods of Appendix B of this code.