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GB/T 39963-2021: Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft
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GB/T 39963-2021: Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft

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Technical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft ICS 73.020 CCSD15 National Standards of People's Republic of China Application of shaft wall freezing method C80~C100 Concrete technical specification freezingshaft Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbol 3 5 Freezing shaft sinking shaft wall structure and design 6 5.1 Basic principles 6 5.2 Shaft wall structure 6 5.3 Shaft wall load calculation 8 5.4 Shaft wall structure design 9 6 Requirements for the design and implementation of the freezing scheme 14 6.1 General provisions 14 6.2 Freezing wall design 14 6.3 Arrangement of freezing holes 14 6.4 Freezing process detection, analysis and regulation 14 7 Raw materials and mix ratio 15 7.1 Raw materials 15 7.2 Mix ratio 16 8 Shaft wall construction 16 8.1 Raw material management 16 8.2 Construction preparation 17 8.3 Concrete production and pouring 17 8.4 Maintenance of concrete 18 8.5 Test block making and test 18 9 Quality Inspection 18 Appendix A (Normative) Freezing Scheme Design 19 Appendix B (Normative) Test method and evaluation of concrete crack resistance 23 References 24

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. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the China Coal Industry Association. Drafting organizations of this document. Beijing Zhongmeishan Engineering Co., Ltd., China Building Materials Research Institute Co., Ltd., SDIC Coal Co., Ltd., Beijing Coal Science and Technology Union Applied Technology Research Institute, Jiangsu Subote New Material Co., Ltd., China Coal Science and Industry Group Wuhan Design and Research Institute Co., Ltd., Zhongyun International Engineering Co., Ltd., China Coal Xi'an Design Engineering Co., Ltd., China Coal New Energy Co., Ltd., Henan Guolong Mining Construction Co., Ltd. The main drafters of this document. Li Gongzhou, Yao Yan, Liu Jiaping, Gao Chunyong, Zeng Fanwei, Liu Jianzhong, Wang Ling, Liu Qingli, Liu Mindong, Chen Zhangqing, Wu Hao, Zhang Ying, Gao Wei, Zhang Zhifan, Jia Chenggang, Wang Zhijie, Ju Xianbo, Tan Jie, Cui Hao, Chen Daochong, Zhao Yuming, Yang Chaofeng, Song Wei, Li Ning, Xu Shurong, Liu Xiaomin, Guo Lei, Ning Fangbo, Wang Heng, Chen Honglei, Zhang Qianqian, Guang Jianmiao. Application of shaft wall freezing method C80~C100 Concrete technical specification

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. ...