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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 21075-2007: [GB/T 21075-2007] Reservoir-induced earthquake hazard assessment Status: Valid
Basic dataStandard ID: GB 21075-2007 (GB21075-2007)Description (Translated English): [GB/T 21075-2007] Reservoir-induced earthquake hazard assessment Sector / Industry: National Standard Classification of Chinese Standard: P15 Classification of International Standard: 91.120.25 Word Count Estimation: 13,181 Date of Issue: 2007-08-02 Date of Implementation: 2008-03-01 Quoted Standard: GB 17741; DB/T 14 Regulation (derived from): China Announcement of Newly Approved National Standards No. 8, 2007 (No. 108 overall) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This Chinese standard specifies the reservoir water conservancy and hydropower project influence area reservoir induced seismic risk evaluation of job content and technical requirements and working methods. This standard applies to new expansion of large-scale water conservancy and hydropower project siting and seismic design and engineering of earthquake disaster affected zone of the reservoir. GB 21075-2007: [GB/T 21075-2007] Reservoir-induced earthquake hazard assessment---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.Reservoir-induced earthquake hazard assessment ICS 91.120.25 P15 National Standards of People's Republic of China Reservoir induced earthquake hazard assessment Posted 2007-08-20 2008-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThe standard Chapter 4, 5.1, 5.2 for the mandatory provisions, other technical content are recommended. The Standard Appendix A, Appendix B, Appendix C, Appendix D is an informative annex. The standard proposed by China Seismological Bureau. This standard by the National Standardization Technical Committee earthquake (SAC/TC225) centralized. This standard was drafted. Institute of Geology, China Earthquake Administration, China Institute of Water Resources and Hydropower Institute of Disaster Prevention Science and Technology, Beijing Seismological Bureau, China Earthquake Administration Institute of crustal stress, Hubei Provincial Seismological Bureau, Institute of Geophysics, China Earthquake Administration. The main drafters of this standard. Yang Qingyuan, Hu Yuliang, Wang Yong Xi, thin Jingshan, Hu Ping, Su Kai, Li Enron, CHEN Xian-Cheng, Feng Yijun.IntroductionThe standard reservoir induced seismicity (reservoir-inducedearthquake) is due to Reservoir or water level changes caused by land shock. There currently are using the reservoir induced seismicity and reservoir triggered earthquakes (reservoir-triggeredearthquake) title to distinguish trigger earthquakes The different genetic mechanisms. The former believe that the original crustal stress around the reservoir is not necessarily undermine the critical state, or reservoir storage level Changes in the steady state so that the original structure of the surface instability and earthquake; while the latter believe crustal stress around the reservoir has been damaged in Critical state, after the impoundment or surface water level changes so that the original structure in the critical state of instability and destruction of the earthquake. This standard specification only Issues related to the earthquake or after impoundment water level variation in risk evaluation and does not involve the causes of earthquakes triggered, so a A more consistent approach at home and abroad, will be due to the impoundment or water level changes caused by the earthquake is defined as reservoir induced seismicity. Reservoir induced earthquake hazard assessment is water conservancy and hydropower project safety assessment is an important part. National Standard GB 17741 "Engineering Field To seismic safety evaluation "No related content for reservoir-induced earthquake hazard assessment made provisions and engineering seismic safety assessment Price does not fully cover all the technical content of reservoir induced seismic risk assessment. Reservoir induced earthquake hazard assessment is the construction of the reservoir According to seismic and geologic condition before the possibility of the reservoir affected zone of reservoir induced seismicity might library segment and the largest earthquake magnitude and evaluation After the impoundment period of time tracking and monitoring work. Our country is one of reservoir induced earthquakes occur more known seismogenic reservoir has more than 20 cases. Xinfeng River Reservoir is the world's first 6.0 earthquake occurred above the reservoir, and caused serious reservoir induced earthquake. Study of reservoir induced seismicity from 1960 In the beginning, seismic system and water conservancy and hydropower and other departments conducted extensive research, made some progress. As energy, flood control, water supply, etc. Demand for some time to come China will build a number of high dam engineering, reservoir induced earthquake hazard assessment put forward higher requirements. Help standardize the preparation of this standard reservoir induced earthquake hazard assessment work, strengthen water conservancy and hydropower project safety management awareness, promote Reservoir Healthy development induced seismic hazard evaluation work. Reservoir induced earthquake hazard assessment1 ScopeThis standard specifies the reservoir water conservancy and hydropower project reservoir induced earthquake affected areas of risk assessment work content, technical requirements and work method. This standard applies to new construction, seismic design of earthquake disaster reduction and expansion of large-scale water conservancy and hydropower project, the project site and the effects of reservoir area.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 17741 project site seismic safety evaluation DB/T 14 in-situ stress measurement method and hydraulic fracturing method Overcoring Technical Specifications3 Terms and DefinitionsThe following terms and definitions apply to this standard. 3.1 Earthquake As water or water level changes caused. NOTE. rewrite GB/T 18207.2-2005, the definition of 1.1.6. 3.2 Reservoir may occur reservoir - induced earthquake zone. 3.3 Normally, the reservoir submerged range. 3.4 Range Reservoir area and the extension of 10km.4 reservoir induced earthquake hazard evaluation and classification work content4.1 reservoir induced earthquake hazard evaluation according to the actual needs and the size of the project is divided into A and B levels. 4.2 Class work applies to the dam storage capacity greater than or equal greater than or equal to 200m 5 × 109m3 or near the plant, a direct threat to Ayutthaya City secure large-scale water conservancy and hydropower projects, work should include the following. a) Reservoir Geological Survey, the systematic collection of regional tectonics and seismic data, the area of data collection does not exceed 150km; Background seismicity study b) the effects of reservoir; c) collecting reservoir affected zone to deep structures information required should be carried out to deep structures of work; d) collection reservoir affected zone stress measurement data, the need should be deep-situ stress measurements; e) deterministic and probabilistic evaluation of the risk evaluation of reservoir induced seismicity. B 4.3 apply to work in the height of 100m ~ 200m or between storage capacity between 5 × 108m3 ~ 5 × 109m3 of water conservancy plumber Cheng, work should include the following. a) reservoir geological surveys, reservoir-affected zone of seismic activity background research to stress the basic data collection; b) evaluation of deterministic and probabilistic evaluation of reservoir induced earthquake risk. Less than 4.4 B project need for reservoir-induced earthquake hazard assessment of large-scale water conservancy and hydropower project, press B work content. 4.5 expansion project after the expansion of capacity or when the dam reached a new job grading scale, after expansion should be located within the working class Capacity of reservoir induced earthquake hazard assessment.5 main maps and map compilation requirements5.1 scale maps should 1.200000 ~ 1.500000 All maps shall be marked with the location of the dam and reservoir area. Geological Drawings range In the main reservoir affected zone, when there should be an epitaxial region fracture in reservoir affected area-wide basis. 5.2 prepare geologic map should include the following. Major faults distributed a) the effects of reservoir area, occurrence, nature and the latest Activities. b) Reservoir library water exposed to a combination of lithology or rock structure type, age and boundaries; c) spring water (cold seeps and hydrothermal vents) dew point position. 5.3 earthquake epicenter distribution, shall be marked with the starting and ending year and earthquake magnitude data. 5.4 reservoir induced earthquake hazard assessment map. Flag reservoir influence area of each library segment reservoir induced earthquake magnitude, or intensity of ground motion parameters.6 Reservoir Geological Survey Basic RequirementsGeological map scale of not less than 6.1 1.200000, scale topographic map is not less than 1.100000 basemap, within the scope of geological reservoir area Conditions survey. 6.2 Review Reservoir area major fault location, occurrence and mechanical properties, fracture data collection activities. 6.3 collect and analyze various types of discontinuities of water, penetration and closed conditions. Joint investigation and measurement of direction, density and nature; painted Joint measurements made stereographic projection or roses. 6.4 Review Reservoir lithology, occurrence, Combined and hydrogeological characteristics of the data. 6.5 investigate and collect Reservoir area karst distribution of karst development degree, size and contact with the reservoir water. 6.6 collect survey data and a large reservoir area of unstable rock. 6.7 collect and focus the review Springs Reservoir area exposed location, flow, temperature (hot spring), Causes.7 Reservoir seismic activity affected area background and initial stress field7.1 earthquake catalogs shall comply with the provisions of GB 17741, available local stations and engineering station network of seismic data. 7.2 investigate and collect reservoir area felt the earthquake and its causes, review Reservoir area greater than magnitude 3.0 earthquake epicenter intensity and magnitude of greater than or equal 4.7 earthquake in Isoseismal. Mining survey collected 7.3 points reservoir area of influence of the source of the explosion, artificial vibration source, other types of induced seismicity. 7.4 Reservoir affected zone to investigate the stress field should include the following. a) collecting reservoir affected zone and adjacent areas of earthquake focal mechanism solutions, including integrated fault plane solutions of small earthquakes information; b) collecting data in-situ stress measurement reservoir-affected zone and adjacent areas, as a point of actual investigation if necessary. Note. The data above range adjacent areas of either can be determined Reservoir water stress state can be. 7.5 Class work should do the following. a) to deal with the effects of reservoir area historical earthquake epicenter and focal depth review; b) the time when the former impoundment area network or local station can not control the effects of reservoir area greater than or equal 1.0 earthquake, earthquake monitoring network should be set up, monitoring Measuring the effects of reservoir seismicity background; C) When the need for deep-situ stress measurement, deep-situ stress measurements should implement the provisions of DB/T 14's. NOTE. Depth take maximum principal stress by deep vertical depth of the horizontal shift, usually in 300m. 7.6 reservoir induced earthquake hazard assessment carried out prior to impoundment, and reservoir induced earthquake monitoring network not directly linked to the need to track and monitor Reservoir induced seismicity should establish reservoir induced earthquake monitoring network.8 Uncertainty Evaluation8.1 reservoir induced earthquakes is divided section of the library 8.1.1 should consider the following earthquakes, geological conditions are divided. a) local topography; b) or a combination of rock lithology structure traits; c) structural position, breaking nature of the activities of the times, manner, bond conditions, the corrugated shape and size; d) hydro-geological conditions. the nature of the relationship between the type of groundwater, and water permeable surface discontinuities, water and drainage, sub-karst Cloth, the degree of development and size; e) the infiltration conditions include. mulching, permeable underground passage, closed conditions; f) to stress field and its relationship with major faults; g) seismicity background. 8.1.2 in accordance with Appendix A divided three kinds of library segment. a) induced earthquake possibility of a larger segment of the library; b) the possibility of induced earthquakes of smaller libraries section; c) difficult to induce seismic library segment. 8.2 reservoir induced seismicity largest magnitude is determined By earthquakes, geological and engineering conditions for determining the maximum magnitude of reservoir induced seismicity. Analogy a) reservoir conditions. the reservoir induced earthquakes occurred seismic, geological and engineering conditions of contrast, consider having similar conditions The reservoir has the possibility of an earthquake of the same intensity; b) the maximum magnitude of reservoir influence area within the range of historical earthquakes; c) According to induce an earthquake fault length calculation of reservoir induced earthquake magnitude, calculated, see Appendix B.9 probability evaluation9.1 collect domestic and foreign large-scale water conservancy and hydropower project reservoir induced earthquake cases earthquakes and induce a certain number of randomly chosen not occur Reservoir Large earthquake engineering example, a common component sample set. Sample set of reservoir induced earthquake cases and the proportion of the total number of samples should not be less than 12%. Total number of samples shall not be less than 234. 9.2 Factors determining reservoir induced earthquakes induced earthquakes. Induced shock factors include. deep repository, storage capacity, or a combination of lithological rock type structure, tectonic stress Environmental or stress state, fault activity, seismic activity background, hydrogeological structure surface development, the hydrogeological structure and surface water off the library Department of karst development degree. Wherein the deep repository, or a combination of lithological rock type structure, tectonic stress environment or stress state, and so is the fault activity The basic factor that must be selected. Alternatively to the basic factors should be composed of several factors induced shock factor set to be less than the number of selected factors 5. 9.3 earthquake induced factors in its "state" to represent each factor can be divided into several states, but at least should be divided into two states. Status of various factors Division method in Appendix C. 9.4 determine the forecast objectives, namely to predict maximum magnitude of reservoir induced earthquake sub-file (divided into several intervals), sub-file to the appropriate magnitude, both To consider the magnitude of the interval should take into account the number of samples, the grade should be at least two tranches. 9.5 Factors and state statistical sample different magnitudes grades belongs. To induce shock factor concentrate each of these factors lead to a different state constitution Induced shock factor combination of the magnitude condition grades, and their statistical probability. 9.6 Analysis has been assessed reservoir induced seismicity induced by various factors and state earthquake library segment. To induce shock factor concentrate every element belongs The combination of conditions constituting the state of reservoir induced earthquakes Factors section in A j represents. 9.7 according to equation (1) were calculated under multivariate probability of each state may induce earthquakes of different magnitude earthquake library segment. (1) Where. J --- A library of reservoir induced seismicity each segment of each shock induced factors and their respective state, that is a combination of factors induced shock conditions (j = 1,2,3 ); 10 comprehensive evaluation of reservoir induced earthquake risk 10.1 Evaluation of reservoir induced earthquake maximum magnitude Each library section 10.1.1 The maximum magnitude of reservoir induced earthquakes were induced by the shock result of various conditions to determine the comprehensive evaluation. The most comprehensive assessment may occur Students of the library as the maximum magnitude of reservoir induced the largest segment magnitude earthquake. When deterministic and probabilistic evaluation of the evaluation results are inconsistent, to determine Evaluation based. 10.1.2 Integrated reservoir induced seismicity each library segment maximum magnitude, making the overall evaluation of reservoir induced earthquake risk. 10.2 Evaluation of reservoir induced earthquake dangers 10.2.1 reservoir induced earthquake epicentral intensity and magnitude of the relationship between the general Appendix D. Each library segment given reservoir reservoir induced earthquakes strong Value. 10.2.2 reservoir induced seismic intensity attenuation in Appendix D oval attenuation model. When the reservoir induced seismicity induced Risk Assessment When more than seismic intensity Ⅵ degrees, should be evaluated on reservoir induced seismicity and hydraulic structures Reservoir environment may bring harm.Appendix A(Informative) Reservoir induced seismicity library divided in accordance with Table A. 1 reservoir induced seismicity library divided in accordance with Library section Library divided in accordance with Valley topography tectonic lithologic conditions of the infiltration conditions of seismic activity background Reservoir Evoked earthquake may Of the more big Library section Canyon, V-type longitudinal valley Valley, steep slope, bedrock Bare existence poorly Plastid The core of the anticline, syncline Wings, water and water permeable Zhang sectional structure of the site, Not even to exist along the river Continued surface Pure yield large thickness More gentle form of limestone, white Dolomitic limestone, marble pure Or massive rock Lots of exposed bedrock, underground River, karst pipeline into Network, active fault Activity area, weak earthquake, no Earthquake zone Canyon, V-type longitudinal valley Valley, steep slope, bedrock Bare existence poorly Plastid Water and permeable tensional Section construction site, there is a Down the river to the discontinuity Igneous intrusions and giant Or said thick lava blocks Shaped rock Lots of exposed bedrock, bedrock There are good connectivity through Water channel, active fault Activity area, weak earthquake, no Earthquake zone Reservoir Evoked earthquake may Of the more small Library section Gully, gentle slope, canyon Tomographic cracks are not developed The thin layer of limestone and, Thin limestone and clastic rocks, Marl interbedded or the like, said Layered Rock And undeveloped karst Activity area, weak earthquake, no Earthquake zone Easy Evoked earthquake Library section Gully, gentle slope Tomographic cracks are not developed, the layer Between poor connectivity Metamorphic schist, board And sedimentary rocks of page Rock, sandstone, conglomerate broken Crumbs rock series; Quaternary in Conglomerate, shale and soil And other loose rock series There are soft layer covering the surface Activity area, weak earthquake, no Earthquake zoneAppendix B(Informative) The...... |
