NB/T 10147-2019Code for engineering geological investigation for biomass power generation projects (English PDF)

Foreword

This document was issued on 4 June 2019 by the National Energy Administration of the PRC and takes effect on 1 October 2019.

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 27.010, Chinese classification F13.

This code was formulated in accordance with the requirements of the Notice of the National Energy Administration on Issuing the Second Batch of the 2014 Energy Sector Industry Standard Formulation (Revision) Plan (Guo Neng Ke Ji [2015] No. 12). The drafting group carried out extensive investigation and research, conscientiously summarized engineering practice experience, and formulated this code on the basis of widely soliciting opinions.

The main technical contents of this code are: investigation for site selection, preliminary investigation, detailed investigation, special engineering geological investigation, analysis and assessment of engineering geology, preparation of the engineering geological investigation report, and inspection and monitoring.

This code is under the administration of the National Energy Administration. It is proposed and routinely managed by China Renewable Energy Engineering Institute, which is also responsible for the explanation of its specific technical contents. Any comments or suggestions arising during implementation should be sent to China Renewable Energy Engineering Institute (address: No. 2 Liupukang Beixiaojie, Xicheng District, Beijing, postcode 100120).

Chief development organization: PowerChina Huadong Engineering Corporation Limited.

Participating development organizations: Zhejiang Huadong Construction Engineering Co., Ltd.; China Power Engineering Consulting Group East China Electric Power Design Institute Co., Ltd.; China United Engineering Corporation Limited; Zhejiang Chengjian Meiqi Redian Sheji Yuan Co., Ltd.; Hohai University.

Chief drafting staff: Shan Zhigang, Ye Zhiping, Shentu Yuejun, Wang Mingyuan, Zhang Jie, Wu Gang, Yi Shenzhou, Zhang Zuguo, Du Wenbo, Chen Changhe, Xiong Xiao, Fei Zhouhua, Chen Liang, Liu Jiangang.

Chief reviewing staff: Yang Jian, Hu Xiaofeng, Li Wengang, Xu Haiyun, Xia Hongliang, Liu Zhenyan, Lou Junqing, Gong Hailing, Yang Shengwei, Zhong Jianping, Huang Jingbo, Peng Bin, Li Shibai, Yang Qingyi, Zhang Ruisong, Chen Zhijie, Zhou Wenyou, Piao Ling, Li Shisheng.

Publication information

NB/T 10147-2019 is an Energy Industry Standard of the People's Republic of China, classified P, issued on 4 June 2019 and implemented on 1 October 2019. It is issued by the National Energy Administration. ICS 27.010; CCS F13.

Chief development department: China Renewable Energy Engineering Institute. Approval department: National Energy Administration. Implementation date: 1 October 2019.

Published and distributed by China Water & Power Press, No. 1 Yuyuantan South Road, Haidian District, Beijing 100038 (website www.waterpub.com.cn), and sold through Xinhua bookstores and related outlets throughout the country. Printed by Qingsong Yongye (Tianjin) Printing Co., Ltd.

Format: 140 mm x 203 mm, 32mo, 2.75 printed sheets, 74 thousand characters. First edition October 2019, first printing October 2019, print run 0001-1000 copies. Book number 155170-514. Price 55.00 yuan.

Announcement of the National Energy Administration

National Energy Administration Announcement 2019 No. 4: the National Energy Administration approved 297 industry standards, including the Code for Electrical Design of Photovoltaic Power Projects, of which 105 are energy standards (NB), 168 are electric power standards (DL) and 24 are petrochemical standards (NB/SH), and hereby issues them. Attachment: catalogue of industry standards. National Energy Administration, 4 June 2019.

In the attached catalogue of industry standards, item No. 20 is NB/T 10147-2019, Code for Engineering Geological Investigation for Biomass Power Generation Projects, with no superseded standard listed, approval date 2019-06-04 and implementation date 2019-10-01.

Structure of the remaining parts

According to the official contents, the code continues with Chapter 5 Preliminary Investigation, Chapter 6 Detailed Investigation (general requirements, straw power generation project, garbage power generation project, biogas power generation project) and Chapter 7 Special Engineering Geological Investigation (general requirements, adverse geological actions and geological hazards, special rock and soil).

Chapter 8 covers Analysis and Assessment of Engineering Geology (general requirements, geotechnical parameters analysis, engineering geological assessment of site area buildings and structures); Chapter 9 covers Engineering Geological Investigation Report Preparation; Chapter 10 covers Inspection and Monitoring (general requirements, field inspection, field monitoring).

Appendix A: Division of Construction Seismic Site. Appendix B: Drawings and Attachments of Engineering Geological Investigation Report.

Appendix C: Classification of Regionally Tectonic Stability. Appendix D: Classification of Site Stability and Construction Suitability. Appendix E: Testing Methods for Flow Velocity and Direction of Groundwater.

The code closes with the Explanation of Wording in This Code, the List of Quoted Standards and, as an addition, the Explanation of Provisions.

1 Scope

NB/T 10147-2019 governs the engineering geological investigation for biomass power generation projects in China - plants fired on straw and agricultural residue, plants burning municipal waste, and biogas plants. These are modest structures compared with a dam, but they combine heavy concentrated loads from boilers and turbines, tall stacks sensitive to differential settlement, large fuel storage yards, and in the case of waste plants deep bunkers and leachate structures that must not leak into the groundwater. The code sets the general provisions and defined terms, then the basic requirements on the scope of investigation at each design stage from site selection and feasibility through preliminary design to construction drawings, with the grading of the investigation by the complexity of the site and the importance of the structures. It covers site selection and the evaluation of site stability, the investigation of the main building with its turbine and boiler foundations, the chimney, the cooling tower, the fuel and ash yards, the waste bunker and leachate treatment, and the ancillary buildings and roads. For each it sets the exploration layout and depth, the in-situ and laboratory testing required, the assessment of bearing capacity, settlement and foundation options, and the corrosivity of soil and groundwater. The hydrogeological assessment, seismic evaluation and the content of the investigation report close the code.

1.0.1 This code is formulated with a view to unifying the tasks, contents and technical requirements of engineering geological investigation at each stage of biomass power generation projects, and to ensuring the quality of investigation work and of its results.

1.0.2 This code is applicable to the engineering geological investigation of straw power generation, garbage power generation and biogas power generation projects.

1.0.3 In addition to this code, the engineering geological investigation of biomass power generation projects shall also comply with the current relevant standards of the nation.

2 Terms

2.0.1 biomass power generation project: a project that generates electricity using as raw material biomass from agriculture and forestry, domestic garbage, organic waste and the like.

2.0.2 straw power generation project: a project that uses as raw material the residues of crop stalks, leaves and ears remaining after harvest, and the residues remaining after forestry felling, timber production and processing, and generates electricity by direct combustion, gasification combustion or similar methods.

2.0.3 garbage power generation project: a project that uses domestic garbage and part of industrial garbage having a relatively high calorific value and suitable for treatment by incineration, and generates electricity by direct combustion or gasification combustion.

2.0.4 biogas power generation project: a project that adopts an anaerobic digestion process and generates electricity from the biogas produced by treating agricultural organic waste, industrial organic wastewater, industrial organic waste residue and sludge.

2.0.5 special rock and soil: rock mass or soil mass formed under specific geographical environments or man-made conditions and having special material composition, structure, physical and mechanical properties and engineering characteristics.

3 Basic Requirements

3.0.1 The engineering geological investigation of biomass power generation projects should be divided into three stages: investigation for site selection, preliminary investigation and detailed investigation. The investigation work of each stage shall have clear tasks and a prominent focus, and shall be commensurate with the work depth of the corresponding design stage. For projects with simple geological conditions and relatively abundant basic data, investigation stages may be combined.

3.0.2 The complexity of the construction site should be divided into three grades, complex site, moderately complex site and simple site, and shall comply with the following requirements.

3.0.2 item 1: A site meeting any one of the following conditions is a complex site.

3.0.2 item 1 1): The terrain is undulating, the terrain slope is greater than 15 degrees, and there are more than three landform types.

3.0.2 item 1 2): Adverse geological actions affecting site stability exist.

3.0.2 item 1 3): The site is a dangerous area for seismic construction.

3.0.2 item 1 4): Hydrogeological conditions are complex, with multiple aquifer layers of groundwater affecting the project.

3.0.2 item 2: A site meeting all of the following conditions at the same time is a simple site.

3.0.2 item 2 1): The terrain is gentle, the terrain slope is less than 10 degrees, and the landform type is single.

3.0.2 item 2 2): There are no adverse geological actions.

3.0.2 item 2 3): The site is a favourable or general area for seismic construction.

3.0.2 item 2 4): Groundwater has no adverse influence on the foundation.

3.0.2 item 3: Sites other than complex sites and simple sites are moderately complex sites.

3.0.2 item 4: The division of areas for seismic construction shall comply with Appendix A of this code.

3.0.3 The complexity of the foundation should be divided into three grades, complex foundation, moderately complex foundation and simple foundation, and shall comply with the following requirements.

3.0.3 item 1: A foundation meeting any one of the following conditions is a complex foundation.

3.0.3 item 1 1): There are many types of rock and soil, very non-uniform, with large variations in properties, requiring special treatment.

3.0.3 item 1 2): Special rock and soil with severe collapsibility, expansiveness, salinization or contamination, and other rock and soil with complex conditions requiring dedicated treatment.

3.0.3 item 2: A foundation meeting all of the following conditions at the same time is a simple foundation.

3.0.3 item 2 1): The rock and soil are of a single type, uniform, with small variations in properties.

3.0.3 item 2 2): There is no special rock and soil.

3.0.3 item 3: Foundations other than complex foundations and simple foundations are moderately complex foundations.

3.0.4 Before the investigation work of each stage is carried out, the existing geological data of the project area shall be fully collected, the natural conditions and working conditions of the project area shall be understood, and an engineering geological investigation outline shall be prepared.

3.0.5 The contents of the engineering geological investigation outline should comply with the following requirements.

3.0.5 item 1: Investigation stage and the purpose and tasks of the investigation.

3.0.5 item 2: Project overview and the status of collection of existing geological data.

3.0.5 item 3: Main conclusions and main review comments of the engineering geological investigation of the previous stage.

3.0.5 item 4: Basis of the investigation work, key points of the investigation and working approach.

3.0.5 item 5: Investigation contents, methods, layout of exploration and technical requirements.

3.0.5 item 6: Planned workload and schedule arrangement.

3.0.5 item 7: Contents of the results to be submitted.

3.0.5 item 8: Project management and quality assurance measures.

3.0.5 item 9: Measures relating to environmental protection, work safety and occupational health.

3.0.6 Where there are adverse geological actions affecting site stability, special rock and soil, or engineering geological and hydrogeological problems that may lead to large-area groundwater and soil contamination, special engineering geological investigation or dedicated research shall be carried out.

3.0.7 After completion of the engineering geological investigation work of each stage, an engineering geological investigation report shall be prepared. The engineering geological investigation report shall include the main text, drawings and attachments, and the drawings and attachments of the report shall comply with Appendix B of this code.

3.0.8 Field inspection and monitoring shall be carried out during the construction period to verify and check the results of the engineering geological investigation.

3.0.9 During the engineering geological investigation, attention shall be paid to environmental protection, work safety and occupational health.

4 Investigation for Site Selection

4.0.1 On the basis of surveying and understanding the engineering geological conditions of the site, the investigation for site selection shall evaluate regional tectonic stability, preliminarily evaluate the stability of the site and its suitability for construction, and provide the geological data required for selecting the site.

4.0.2 Where there are two or more proposed sites, the engineering geological conditions shall be compared and an engineering geological comparison and selection opinion shall be put forward.

4.0.3 Site selection shall comply with the following requirements.

4.0.3 item 1: Active faults that may cause surface displacement, and areas where secondary seismic geological hazards affecting site stability, such as landslides and collapses, may occur during an earthquake, shall be avoided.

4.0.3 item 2: Areas where adverse geological actions affecting project safety exist at the site and its surroundings should be avoided.

4.0.4 The contents of the investigation for site selection shall comply with the following requirements.

4.0.4 item 1: Collect, compile and analyze the existing relevant data.

4.0.4 item 2: Collect the regional geology and seismic overview of each site.

4.0.4 item 3: Understand the engineering geological and hydrogeological conditions of each site, such as landform, stratigraphy and lithology, geological structure and groundwater characteristics, and preliminarily analyze the main engineering geological problems of the site.

4.0.4 item 4: Understand the types and scale of adverse geological actions and geological hazards affecting the site. For sites in urban and plain areas, mainly understand adverse geological actions such as ancient river channels, buried ponds, creeks and gullies, ground collapse and ground fissures; for sites in mountainous areas, mainly understand adverse geological actions such as landslides, collapses and dangerous rock masses, debris flows, mined-out areas, ground collapse and ground fissures, and preliminarily evaluate their influence on the site.

4.0.4 item 5: Understand the distribution, exploitation and planning of mineral deposits in and near each site area.

4.0.4 item 6: Preliminarily analyze the influence of project construction on the geological environment.

4.0.5 The methods of the investigation for site selection shall comply with the following requirements.