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(Design specification of roller compacted concrete gravity dam)
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NB/T 10332-2019
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Basic data | Standard ID | NB/T 10332-2019 (NB/T10332-2019) | | Description (Translated English) | (Design specification of roller compacted concrete gravity dam) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | P59 | | Classification of International Standard | 27.140 | | Word Count Estimation | 93,932 | | Date of Issue | 2019 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | National Energy Administration | NB/T 10332-2019: (Design specification of roller compacted concrete gravity dam)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Code for Design of Roller-Compacted Concrete Gravity Dams
Energy Industry Standards of the People's Republic of China
Design code for roller compacted concrete gravity dam
2019-12-30 released
2020-07-01 Implementation
Issued by the National Energy Administration
Energy Industry Standards of the People's Republic of China
Design code for roller compacted concrete gravity dam
Editor-in-chief. General Institute of Hydropower and Water Conservancy Planning and Design
Approval department. National Energy Administration
The National Energy Administration approved 152 energy industry standards including the "Operation and Maintenance Regulations for the Excitation System of Small Hydropower Units"
Foreword
According to the "Notice of the General Office of the National Development and Reform Commission on Printing and Distributing the.2008 Industry Standard Plan" (Development and Reform Office)
Industry (2008) No. 1242), the normative team has conducted extensive investigations and studies, carefully summed up practical experience, and participated in the
Examine relevant domestic advanced standards, and formulate this specification on the basis of extensive solicitation of opinions.
The main technical content of this code is. basic regulations, layout of roller compacted concrete gravity dam, concrete material of dam body
And performance, dam section design, dam seepage prevention and concrete zoning, dam structure, dam crack prevention and temperature control,
Safety monitoring design, construction requirements, initial water storage and operation and maintenance.
This specification is managed by the National Energy Administration, proposed by the General Institute of Hydropower and Water Conservancy Planning and Design, and is responsible for daily management.
The technical committee for standardization of hydropower survey and design in the energy industry is responsible for the interpretation of specific technical content. During the execution, such as
If you have any comments or suggestions, please send it to the General Institute of Hydropower and Water Conservancy Planning and Design (Address. No. 2 Kangbei Xiaojie, Liupu, Xicheng District, Beijing
No., Zip Code. 100120).
Editor-in-chief of this code. China Power Construction Group Zhongnan Survey Design & Research Institute Co., Ltd.
Participating unit of this specification. China Power Construction Group Guiyang Survey, Design and Research Institute Co., Ltd.
The main drafters of this specification. Feng Shurong, Xiao Feng, Shi Qingchun, Zhou Yuefei, Xiong Wenqing
Liu Jianming Xu Changhong Fan Fuping Wang Hongbin Su Junan
Zhang Jianguo Xu Lin
Main reviewers of this code. Dang Lin Cai Fang Guangda Hu Bin Ai Yongping Jin Feng
Fang Kunhe Liu Yi Yang Bo Wang Qingyuan Deng Yiguo
Chen Xiangrong Xu Jianqiang Chen Yongfu Weng Yin Chen Qiuhua
Shao Jingdong Yang Jiaxiu Long Qi Huang Cui Jin Wang Guojin
Li Linian Zhao Yi Wang Fuqiang Du Xiaokai Li Shisheng
Table of contents
1 General...1
2 Terms and symbols...2
2.1 Terminology...2
2.2 Symbols...2
3 Basic regulations...3
4 Layout of RCC Gravity Dam...4
5 Dam concrete materials and properties...5
5.1 General provisions...5
5.2 Standard Values of RCC Material Performance...5
6 Dam section design...7
7 Dam body seepage prevention and concrete zoning...8
7.1 Anti-seepage design of dam body...8
7.2 Zoning of dam concrete...8
8 Dam structure...11
8.1 Joints of the dam body...11
8.2 Dam body corridors and passages...11
8.3 Dam body water stop and drainage...11
9 Dam body crack prevention and temperature control...12
9.1 General regulations...12
9.2 Temperature control standards...12
9.3 Dam concrete crack prevention and temperature control measures...13
10 Safety Monitoring Design...15
11 Construction requirements...17
12 Initial water storage and operation and maintenance...19
Explanation of terms used in this specification...20
List of Reference Standards...21
Attachment. Article description...22
1 General
1.0.1 To standardize the design of roller compacted concrete gravity dams, to ensure the design quality, and to ensure that the design is safe, reliable and economical.
The requirements of reasonable, advanced technology, environmental friendliness, and resource conservation are formulated in this specification.
1.0.2 This code is applicable to the design of roller compacted concrete gravity dams on the rock foundations of newly built, rebuilt and expanded hydropower projects.
1.0.3 The design of roller compacted concrete gravity dam shall not only conform to this code, but also conform to the current relevant national standards
Provisions.
2 Terms and symbols
2.1 Terminology
2.1.1 Roller-compacted concrete (RCC)
Pave the dry hard concrete mixture layer by layer and vibrate the compacted concrete.
2.1.2 RCC gravity dam
Gravity dam constructed of roller compacted concrete.
2.1.3 Mineral admixture
Active or inactive mineral materials mixed into concrete to improve the performance of concrete and reduce the amount of cement.
2.1.4 RCC lift surface
The bonding surface of the upper and lower layers of RCC.
2.1.5 Grout-enriched RCC
In the roller compacted concrete mixture, a certain proportion of mortar is mixed and vibrated to compact concrete.
2.1.6 layer placement duration
The duration from the completion of the rolling of the lower layer of concrete to the completion of the rolling of the upper layer of concrete.
2.2 Symbols
fck-the standard value of the compressive strength of the roller compacted concrete of the dam;
H-the head of the dam surface;
W --Impermeability grade of dam concrete;
k --Permeability coefficient of dam concrete;
△T--allowable temperature difference of roller compacted concrete foundation;
f'-friction coefficient of shear resistance;
c'-Shear resistance cohesion.
3 Basic regulations
3.0.1 RCC gravity dams can be divided into low dams, medium dams and high dams according to their dam height. The dam height is lower than 30m.
The dam is a middle dam with a height of 30m～70m, and a high dam if the dam is above 70m.
3.0.2 The design of roller compacted concrete gravity dams with a dam height greater than.200m or particularly important, while complying with this code,
Special research should be conducted on special issues.
3.0.3 The hydraulic design of the discharge structure of the RCC gravity dam, the pier structure design of the overflow dam, the dam foundation treatment design
The calculation and other contents shall comply with the relevant regulations of the current industry standard "Specification for Design of Concrete Gravity Dams" NB/T 35026.
4 Layout of RCC gravity dam
4.0.1 The layout of the dam body shall comprehensively consider the following factors.
1 The topography, geology, hydrology, meteorology conditions of the dam site area and the source of construction materials.
2 Combining engineering tasks, rationally arrange water discharge, power generation, irrigation, water supply, shipping, emptying, sand discharge, and overpass
The layout of buildings such as fish, floatation, and ice drainage.
3 The scale, structural layout and main dimensions of the dam.
4 Requirements for dam stability, concrete strength and durability.
5 Construction conditions, construction diversion and construction layout, requirements for rapid construction of roller compacted concrete.
4.0.2 The layout of dams, discharge structures, diversion and power generation systems and other major buildings shall be based on their importance,
Factors such as type, construction conditions and operation management shall coordinate the layout to reduce construction interference. Roller compaction coagulation used in the dam
The parts of the soil should be relatively concentrated.
4.0.3 The pivot layout of the roller compacted concrete gravity dam on the narrow river valley should adopt the shore diversion powerhouse or underground powerhouse.
4.0.4 When the dam body is used for water diversion, the water diversion (transportation) pipeline can be horizontally arranged in the lower part of the dam or adopted according to the height of the dam.
Back tube layout.
4.0.5 When arranging drainage structures on the roller compacted concrete dam body, the overflow surface holes should be preferred. The dam body is set with middle hole and deep
In the case of holes or bottom holes, it is advisable to reduce the number of layers and the number of holes in the dam body. The middle hole, deep hole or bottom hole should be of flat-bottomed type.
4.0.6 Dam construction can use dam body orifices or gaps in roller compacted concrete dams for diversion or flooding.
5 Dam concrete materials and properties
5.1 General provisions
5.1.1 The cement, aggregates, admixtures and mixing water used in RCC should comply with the current relevant national standards
Provisions. High RCC gravity dams should be preferred to use medium-heat Portland cement or low-calorie Portland water
mud. The use of alkali active aggregates in dam concrete shall be specially demonstrated.
5.1.2 Active admixtures such as fly ash, granulated blast furnace slag powder, phosphorous slag powder, pozzolana, etc. should be used as admixtures. Blending
The quality requirements of the materials should comply with the current national standard "Technical Specification for Fly Ash Mixed with Hydraulic Concrete" DL/T 5055,
"Granulated blast furnace slag powder used in cement and concrete" GB/T 18046, "Technology of mixing phosphorus slag powder in hydraulic concrete
Technical Specification" DL/T 5387 and "Technical Specification for Natural Pozzolanic Materials Mixed with Hydraulic Concrete" DL/T 5273
Regulations.
5.1.3 The mix ratio of the roller compacted concrete, the water-to-binder ratio of the abnormal concrete grout and the grout amount should be determined by experiments. Adopt live
The total cementitious material dosage of RCC high dams and middle dams with a natural admixture should not be less than 140kg/m3; cementitious materials
The mass ratio of the admixture in the external roller compacted concrete should not exceed 55% of the total cementitious material, and the internal roller compacted
The concrete should not exceed 65% of the total cementitious material. The maximum water-binder ratio of RCC should not exceed 0.55.
5.1.4 After demonstration, the RCC admixture can also be mixed with admixtures such as stone powder. The quality of mixed limestone powder should be
It complies with the relevant regulations of the current industry standard "Technical Specification for Limestone Powder Mixed with Hydraulic Concrete" DL/T 5304.mix
The mix ratio of concrete shall be determined by experiment.
5.1.5 Roller compacted concrete should be mixed with retarding water reducers and air-entraining agents that meet the requirements of millability, retardation and durability.
The quality of the admixture should conform to the current industry standard "Technical Regulations for Hydraulic Concrete Admixtures" DL/T
According to the provisions of 5100, the mixing amount should be determined through experiments, and the air content of concrete mixed with air-entraining agent should be 3% to 5%.
5.1.6 The weight, strength, impermeability, frost resistance, erosion resistance, thermal and crack resistance of RCC and deformed concrete
The performance should meet the performance requirements of the corresponding part of the dam body for the concrete, and the test method of its performance parameters should be in accordance with the current industry
The relevant provisions of the standard "Test Regulations for Hydraulic Roller Compacted Concrete" DL/T 5433 shall be carried out.
5.2 Standard values of performance of RCC materials
5.2.1 The strength grade of the dam concrete should be expressed by the standard value of the compressive strength of the concrete cube of the design age, the symbol
It is the "C-age cube compressive strength standard value (MPa)". The standard value of the compressive strength of the cube should be made according to the standard method
Cubic specimens with a side length of 150mm for curing, measured by standard test methods at the design age, have...
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