NB/T 10514-2021Code for shiplift design of hydropower projects (English PDF)

Foreword

This document was issued on 7 January 2021 by the National Energy Administration of the PRC and takes effect on 1 July 2021.

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 26.

It replaces DL/T 5399-2007, which is superseded.

This Code has been revised by the drafting group in accordance with the requirements of the Notice of the National Energy Administration on Issuing the 2016 Plan for the Development and Revision of Sector Standards in the Energy Field (Guo Neng Ke Ji [2016] No. 238), on the basis of extensive investigation and research, careful summarization of practical experience, and wide solicitation of opinions.

The main technical contents of this Code are: general provisions; terms; basic requirements; type selection and layout; civil structural design; metal structure and machinery and equipment; electrical and automation control; and fire-fighting facility and automatic fire alarm.

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

The contents relating to the wire rope hoist vertical shiplift have been revised.

The contents relating to the machine type of the rack and pinion vertical shiplift have been revised.

Contents relating to the machine type of the hydraulic vertical shiplift have been added.

Contents relating to civil structural design have been added.

Contents relating to project grading and design criteria have been added.

Contents relating to the effective scale of the ship chamber have been added.

Contents relating to navigation capacity have been added.

Contents relating to the appendices have been added.

This Code is under the administration of the National Energy Administration. It was proposed by, and is under the routine administration of, the China Renewable Energy Engineering Institute (General Institute of Hydropower and Water Resources Planning and Design). The Energy Sector Standardization Technical Committee on Hydropower Metal Structures and Hoists (NEA/TC 21) is responsible for the interpretation of the specific technical contents. Should any comment or suggestion arise during the implementation of this Code, please send it to the China Renewable Energy Engineering Institute (address: No. 2 Liupukang Beixiaojie, Xicheng District, Beijing; postal code: 100120).

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

Participating development organizations of this Code: PowerChina Zhongnan Engineering Corporation Limited; PowerChina Kunming Engineering Corporation Limited; PowerChina Guiyang Engineering Corporation Limited; China Three Gorges Corporation; Fujian Shuikou Power Generation Group Co., Ltd.; Huaneng Lancang River Hydropower Inc.; Fuzhou Dexiang Fluid Technology Co., Ltd.

Chief drafting staff of this Code: Hu Taoyong, Ma Renchao, Jin Xiaohua, Han Yifeng, Huang Wenli, Sun Meiling, Tan Shoulin, Ren Tao, Huang Tairen, Wang Jingwen, Yu Guangming, Luo Yuzhen, Wang Chujun, Hu Caishi, Xu Wei, Wang Gongming, Lu Weibing, Xie Sisi, Liu Keping, Gao Wei, Xu Yiqun, Zhang Fuyu, Huang Guangbin, Li Zhi, Cheng Tanghua, Huang Qun, Xu Jun.

Chief review staff of this Code: Gong Jianxin, Lin Chaohui, Li Fuyun, Chen Hong, Yuan Changsheng, Yao Changjie, Zhang Weiming, Zhao Fuxin, Liao Yongping, Ling Yun, Yu Junyang, Liu Keqing, Chen Zhaoxin, Zhan Weijie, Jiang Lin, Ding Lidong, Shen Shoulin, Yue Lei, Li Shisheng.

1 Scope

NB/T 10514-2021 is the Chinese design code for shiplifts on hydropower projects, replacing DL/T 5399-2007. Where a dam is too high for a lock, vessels are carried past it in a water-filled chamber raised and lowered as a single mass - hundreds or thousands of tonnes moving vertically beside the dam - and the code covers the design of that machine and of the civil structure around it. It sets the project grading and the design criteria that follow from it, the effective dimensions of the ship chamber for classes from 100 t to 3000 t, and the navigable conditions at the approaches. It then covers the layout: the upstream and downstream approach channels, the head structures and their gates, the tower or shaft, and the machine room. The lifting system is treated in detail - counterweighted wire rope systems, rack and pinion drive, hydraulic and floating types - with the drive machinery, the safety devices against overspeed and rope failure, the levelling and synchronisation of the chamber, and the electrical and control systems. Structural design of the towers, of the chamber itself and of the gates and seals follows, with the load combinations including seismic input and the accidental cases the safety system must cover. Hydraulic transients in the chamber and the ship-water interaction are addressed, and the code closes with the trial operation, the monitoring and the maintenance expected in service. It applies to the design of shiplifts on hydropower projects in China.

1.0.1 This Code is formulated in order to standardize the design of shiplifts of hydropower projects, to ensure the construction quality of the works, and to follow the principles of safety and reliability, technical advancement, economic rationality, and convenience of operation and management.

1.0.2 This Code is applicable to the design of fully balanced and partial balanced vertical shiplifts of the 100 t class to the 3000 t class for newly built, rebuilt and extended hydropower projects. The machine types covered include the wire rope hoist vertical shiplift, the rack and pinion vertical shiplift, and the hydraulic vertical shiplift.

1.0.3 The following data should mainly be collected for the design of a shiplift of a hydropower project:

1 Navigation planning data such as the waterway class, the vessel types and the freight volume.

2 Natural condition data such as topography, geology, hydrology, meteorology, sediment, water quality and floating objects.

3 Project condition data such as the layout of the project complex and the mode of operation, the characteristic water levels upstream and downstream, the navigable water levels upstream and downstream, and the range and rate of variation of the water levels upstream and downstream.

4 Conditions relating to manufacture, transport and erection.

1.0.4 In addition to complying with this Code, the design of shiplifts of hydropower projects shall also comply with the provisions of the relevant current national standards.

2 Terms

2.0.1 shiplift - A navigation structure that raises and lowers vessels by means of mechanical devices in order to overcome a concentrated water level difference on a waterway.

2.0.2 wire rope hoist vertical shiplift - A shiplift in which the ship chamber is hauled by wire rope hoists so as to achieve vertical raising and lowering.

2.0.3 rack and pinion vertical shiplift - A shiplift in which the ship chamber is raised and lowered vertically by means of pinions rotating along racks fixed to the towers.

2.0.4 hydraulic vertical shiplift - A shiplift which makes use of the water level difference between the upstream and the downstream and drives the counterweights of the shiplift by controlling the water level in the vertical shafts, so as to achieve vertical raising and lowering of the ship chamber.

2.0.5 fully balanced shiplift - A vertical shiplift in which the total weight of the counterweights is equal to the gross weight of the ship chamber.

2.0.6 partial balanced shiplift - A vertical shiplift in which the total weight of the counterweights is not equal to the gross weight of the ship chamber.

2.0.7 ship chamber - The item of equipment that carries the vessel in a vertical shiplift.

2.0.8 gross weight of a ship chamber - The sum of the weight of the ship chamber structure, of the weight of its equipment, and of the weight of the water body corresponding to the design water depth.

2.0.9 counterweight - The device used to balance the weight on the ship chamber side.

2.0.10 torque counterweight - A counterweight suspended by wire ropes wound on the drums of the main hoists, the gravity of which acts indirectly on the ship chamber by applying torque to the drums of the main hoists.

2.0.11 gravity counterweight - A counterweight suspended by wire ropes supported on sheaves, the gravity of which acts directly on the ship chamber.

2.0.12 controllable counterweight - A counterweight suspended by wire ropes wound on drums that are not driven but can be braked, the gravity of which acts indirectly on the ship chamber by applying torque to the drums.

2.0.13 drive system - The power system that drives the ship chamber to rise and to descend. The drive system of a wire rope hoist shiplift is also called the main hoist system.

2.0.14 rated hoist force - The capability of the drive system to overcome the external loads and to drive the ship chamber in operation within the design service life of the mechanical equipment of the shiplift.

2.0.15 lift height - The height through which the shiplift raises and lowers vessels.

2.0.16 allowable water level difference - The difference between the water depth in the ship chamber and the design water depth that is permitted for normal operation of the shiplift.

2.0.17 chamber freeboard - The vertical distance from the water surface in the ship chamber to the top face of the main longitudinal girder under the design water depth condition.

2.0.18 stroke - The travel reserved beyond the upper and lower limit positions of the working travel of the ship chamber, including the buffer travel and the margin travel.

2.0.19 maximum navigable depth - The difference between the highest navigable water level of the upper bay or of the lower bay and the elevation of the floor slab of the corresponding bay.

2.0.20 ship chamber space - The area enclosed by the upper and lower bays, by the load-bearing structures on both sides, by the floor slab and by the bottom slab of the machine house at the top; it is the space within which the ship chamber of a vertical shiplift is raised and lowered.

2.0.21 tower - The vertical load-bearing structure of a vertical shiplift that supports the ship chamber and the counterweight system.