This technical specification is formulated with a view to guiding the construction of high-speed railway tunnel9uniforming major technical requirements， strengthening construction management， and ensuring construction quality.
　　This technical specification is applicable to high-speed railway tunnel construction.
　　The construction of high-speed railway tunnel shall strictly comply with national laws and regulations as well as relevant technical standards， conform to design documents， meet the requirements for safety， durability and system application function of engineering structures， and ensure normal operation during designed service life.
　　All parties involved in the construction shall standardize the management system， manning， onsite management and process control， and achieve such construction management targets as quality， safety， construction period， investment benefit， environmental protection and technological innovation.
　　Mechanized construction， member prefabrication in plant， specialized construction and information technology shall be irutiatively utilized in the construction of high-speed railway tunnel.
　　During the construction of high-speed railway tunnel， great importance shall be attached to geological verification， geological prediction and monitoring and measurement， and strict control shall be made on the construction quality of key works such as advance support， primary support， foundation base treatment， waterproofing9 drainage and secondary lining.
　　During the construction of high-speed railway tunnel， on-site management shall be strengthened， site layout shall be standardized， and HSE （Health， Safety and Environment） management shall be enhanced During the construction of high-speed railway tunnel， attentions shall be paid to the identification， evaluation， prevention， monitoring， emergency response and engineering treatment against geological disasters so as to minimize these disasters and their impacts.
　　During the construction of high-speed railway tunnel， risk management shall be carried out according to specific conditions of the site by means of risk planning， risk identification， risk evaluation， risk assessment， risk control， etc. And special construction plans and emergency plans shall be developed
　　Construction of high-speed railway tunnel shall be on the basis of the protection measures specified in the scheme and design approved by the cultural relic protection administrative department， if cultural relics protection units and other cultural relic sites are involved
　　Construction of high-speed railway tunnel shall strictly comply with relevant national laws， regulations and technical standards on resource saving， energy saving and emission reduction， and the technical measures for energy saving and emission reduction shall be formulated and implemented， taking into account engineering characteristics and construction environment.
　　For high-speed railway tunnel construction， construction emergency rescue organization shall be established and equipped with rescue facilities according to relevant regulations of China Railway Corporation

　　This technical specification is prepared based on the revision to Technical Guide for Construction o f High-speed Railway Tunnel （Document Tie Jian She [2010] No. 241） issued by the former Ministry of Railways， according to the requirements for building the railway engineering construction standard system of China Railway Corporation
　　In preparing this technical specification， coordination is effected with current national standards， professional standards and relevant standards of China Railway Corporation， the contents in the \"Guide\" which are not in accordance with the characteristics and requirements of railway construction projects of China Railway Corporation are adjusted， the experience gained in the construction and operation of high-speed railway tunnel of China Railway Corporation is absorbed， and the partial revisions of relevant standards made in the meantime are incorporated. This specification provides technical support for the quality and safety of railway construction of China Railway Corporation
　　This technical specification consists of 25 chapters： General Provisions， Terms， Basic Requirements， Construction Preparation， Construction Machinery， Survey， Portal Works， Geological Prediction， Construction Method， Excavation， Muck Loading， Haulage and Disposal， Supporting， Lining and Foundation Treatment， Monitoring and Measurement， Waterproofing and Drainage， Auxiliary Structure， Service Gallery， Open-cut Tunnel9 Ventilation and Dust Control during Construction， Compressed Air， Water and Power Supply， Operational Facility Installation， Tunneling in Special Geotechnical and Unfavorable Geological Condition， Tunneling by Shield Machine， Tunneling by TBM， Environmental Protection， Acceptance of Works. Revisions mainly cover the following： provisions on risk management of tunneling， improvement of technological flow and construction process diagram of various construction methods， improvement of technical requirements for tunnel portal construction， tunnel excavation， and foundation treatment of loess tunnels based on the experience obtained
　　All relevant organizations are kindly requested to collect data and sum up experience in implementation of this specification. In case any corrections or supplements are needed， please send the suggestions to China Railway Erju Construction Group Co. ， Ltd. （No. 16， Tongjin Road， Chengdu， Postcode：610032） and submit copies to China Railway Economic and Planning Research Institute（ No. B29， Beifengwo Road， Haidian District， Beijing， Postcode： 100038） for reference in future revision.

1 General Provisions
2 Terms
3 Basic Requirements
3．1 General Requirements
3．2 Client
3．3 Survey and Design Institute
3．4 Contractor
3．5 Supervision Firm
4 Construction Preparation
4．1 Construction Investigation
4．2 Site Check for Design Documents
4．3 Selection of Construction Scheme and Allocation of Resources
4．4 Preparation of Construction Operation Guide
4．5 Construction Technical Explanation
4．6 Site and Camp Construction
5 Construction Machinery
5．1 General Requirements
5．2 Excavation Machinery
5．3 Muck Loading and Transport Machinery
5．4 Supporting Machinery
5．5 Auxiliary Construction Machinery
6 Survey
6．1 General Requirements
6．2 Surface Control Survey
6．3 Tunnel Control Survey
6．4 Construction Survey
6．5 Breakthrough Survey
6．6 As-built Survey
7 Portal Works
7．1 General Requirements
7．2 Excavation and Protection of Side and Front Slopes
7．3 Open-cut Tunnel
7．4 Portal Section Construction
7．5 Portal
7．6 Buffer Structure
8 Geological Prediction
8．1 General Requirements
8．2 Geological Investigation Method
8．3 Drilling Method
8．4 Geophysical Prospecting Method
8．5 Information Management
9 Construction Method
9．1 General Requirements
9．2 Full Face Method
9．3 Bench Cut Method
9．4 Central Diaphragm Method（CD Method）
9．5 Double Side Heading Method
10 Excavation
10．1 General Requirements
10．2 Overbreak and Underbreak Control
10．3 Drilling and Blasting Operation
11 Muck Loading，Haulage and Disposal
11．1 General Requirements
11．2 Truck Haulage
11．3 Track Haulage
11．4 Belt Conveyance
11．5 Muck Disposal
12 Supporting，Lining and Foundation Base Treatment
12．1 General Requirements
12．2 Advance Support
12．3 Primary Support
12．4 FoundationBaseTreatment
12．5 Secondary Lining
13 Monitoring and Measurement
13．1 General Requirements
13．2 Observation
13．3 Measurement
13．4 Measurement Information Management
14 Waterproofing and Drainage
14．1 General Requirements
14．2 Waterproofing and Drainage during Construction
14．3 Structural Waterproofing and Drainage
14．4 Waterproofing by Grouting
15 Auxiliary Structure
15．1Auxiliary Cavern and Connecting Passage
16 Service Gallery
17 Open-cut Tunnel
18 Ventilation and Dust Control during Construction
19 Compressed Air，Water and Power Supply
20 Operational Facility Installation
21 Tunneling in Special Geotechnical and Unfavorable Geological Condition
22 Tunneling by Shield Machine
23 Tunneling by TBM
24 Environmental Protection
25 Acceptance of Works
Explanation of Wording in this Technical Specification