GB/T 39963-2021Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft (English PDF)
立井冻结法凿井井壁应用C80～C100混凝土技术规程
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 9, 2021
Implementation date
October 1, 2021
Scope
GB/T 39963-2021 is the English-translated version of 立井冻结法凿井井壁应用C80～C100混凝土技术规程.
GB/T 39963-2021 is a technical specification for shaft linings made of C80 to C100 concrete in vertical coal mine shafts sunk by the freezing method.
It covers the structure and design of the shaft lining, including load calculation, and the design and implementation of the freezing scheme, with the freezing wall, the arrangement of freezing holes and the monitoring and regulation of the freezing process.
It then sets the raw materials and mix ratio of the concrete, the construction of the lining, from raw material management and concrete production and pouring to curing and test blocks, and the quality inspection.
Normative annexes give the freezing scheme design and a test method for concrete crack resistance. It was issued on 9 March 2021 and has applied since 1 October 2021.
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Document preview — GB/T 39963-2021
National Standard of the People's Republic of China
- ICS
- 73.020
- Classification
- D 15
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbol
- 5 Freezing shaft sinking shaft wall structure and design
- 5.1 Basic principles
- 5.2 Shaft wall structure
- 5.3 Shaft wall load calculation
- 5.4 Shaft wall structure design
- 6 Requirements for the design and implementation of the freezing scheme
- 6.1 General provisions
- 6.2 Freezing wall design
- 6.3 Arrangement of freezing holes
- 6.4 Freezing process detection, analysis and regulation
- 7 Raw materials and mix ratio
- 7.1 Raw materials
- 7.2 Mix ratio
- 8 Shaft wall construction
- 8.1 Raw material management
- 8.2 Construction preparation
- 8.3 Concrete production and pouring
- 8.4 Maintenance of concrete
- 8.5 Test block making and test
- 9 Quality Inspection
- Appendix A (Normative) Freezing Scheme Design
- Appendix B (Normative) Test method and evaluation of concrete crack resistance
- References
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
1 Scope
This document specifies the shaft wall structure and design, freezing scheme design and implementation of the shaft wall using C80~C100 concrete in vertical shaft freezing method.
Requirements for construction, raw material and mix ratio, shaft wall construction, and quality inspection.
This document is applicable to the design and construction of C80~C100 concrete applied to the shaft wall of coal mine shaft freezing method.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB 175 General Portland Cement
GB/T 1499.2 Steel for reinforced concrete Part 2: Hot-rolled ribbed steel bars
GB 8076 concrete admixture
GB/T 18736 Mineral admixture for high-strength and high-performance concrete
GB 50010 Code for Design of Concrete Structures
GB/T 50080 Standard Test Method for Performance of Ordinary Concrete Mixture
GB/T 50081 Standard Test Method for Physical and Mechanical Properties of Concrete
GB/T 50082 Standard Test Method for Long-term Performance and Durability of Ordinary Concrete
GB/T 50107 Concrete Strength Inspection and Evaluation Standard
GB 50119 Technical Specification for Application of Concrete Admixtures
GB 50164 Concrete Quality Control Standard
GB 50213 Code for quality acceptance of coal mine tunnel engineering
GB 50384 Code for design of shaft and chamber of coal mine shaft
GB 50511 Code for construction of coal mine tunnel engineering
JGJ52 Standard for quality and inspection method of sand and stone for ordinary concrete
JGJ55 Design Specification for Ordinary Concrete Mix Proportion
JGJ63 Concrete Water Standard
JGJ/T 241 Technical Specification for Application of Artificial Sand Concrete
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Freezing sinking method
Before the construction of the wellbore, artificial refrigeration is used to freeze the ground around the wellbore to form a temporary bearing and water barrier function.
A construction method in which the frozen wall meets the safety requirements of engineering construction, and then the shaft excavation and masonry work is carried out under the protection of the frozen wall.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
- GB 175Common portland cement
- GB 8076Concrete Admixtures
- GB/T 18736Mineral admixtures for high strength and high performance concrete
- GB 50010Code for design of concrete structures
- GB/T 50080Standard for test method of performance on ordinary fresh concrete
- GB/T 50082Standard for test methods of long-term performance and durability of concrete
GB/T 1499.2 · GB/T 50081 · GB 50511 · JGJ52 · JGJ55 · JGJ63
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GB/T 39963-2021
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