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DL/T 5783-2019: (Technical specification for advance prediction of hydropower and water conservancy underground engineering geology)
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(Technical specification for advance prediction of hydropower and water conservancy underground engineering geology)
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DL/T 5783-2019
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Basic data | Standard ID | DL/T 5783-2019 (DL/T5783-2019) | | Description (Translated English) | (Technical specification for advance prediction of hydropower and water conservancy underground engineering geology) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | P59 | | Word Count Estimation | 43,489 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | DL/T 5783-2019: (Technical specification for advance prediction of hydropower and water conservancy underground engineering geology)
---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.
Technical code of geological advanced prediction of underground engineering for hydropower and water resources
ICS 27.140
P 59
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
P DL/T 5783-2019
Advance forecast of hydropower and underground engineering geology
Technical regulations
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Foreword
According to the "Notice of the National Energy Administration on Issuing the First Batch of Industry Standard System (Revision) Plans in the Energy Sector in.2010"
(Guoneng Science and Technology [2010] No. 320) requirements, after extensive investigation and
Based on the work experience in advanced forecasting of underground engineering geology, this regulation was formulated on the basis of a wide range of opinions.
This regulation is divided into 8 chapters, the main technical contents are. general rules, terminology, basic regulations, geological analysis method, advanced geology
Drilling method, geophysical exploration method, advanced pilot hole method and result report.
This regulation is managed by the National Energy Administration and proposed by the China Electricity Council.
The Zhunhua Technical Committee is responsible for daily management, and the Yangtze River Water Resources Commission and the Yangtze River Academy of Sciences are responsible for the interpretation of specific technical content.
If you have comments and suggestions during the implementation process, please send them to the Standardization Center of China Electricity Council (Address. Baiguang, Beijing)
No. 1, Lu Er Tiao, Zip Code. 100761).
The editor-in-chief, participating units, main drafters and main reviewers of this regulation.
Editor-in-chief. Yangtze River Water Resources Commission, Yangtze River Scientific Research Institute
Participating unit. Key Laboratory of Geomechanics and Engineering, Ministry of Water Resources
China Water Resources and Hydropower 14th Engineering Bureau Co., Ltd.
Inner Mongolia Chifeng Pumped Storage Co., Ltd.
Yangtze River Survey, Planning, Design and Research Institute
China Railway Fourth Survey and Design Institute Group Co., Ltd.
Wuhan City Survey and Design Co., Ltd.
Main drafters. Zhou Liming, Xiao Guoqiang, Wu Xinxia, Yin Jianmin, Zhu Jiebing
Zhang Kun Wang Fagang Li Mei Fu Daiguang Zhang Dong
Zhang Jun Zhou Huamin Li Yujie Li Wenzhong Hou Bingshen
Cui Dehai Wang Fuqiang Wang Yang Zhang Yuting Jiang Yuzhou
Main reviewer. Xu Songlin, Wang Yi, Zhou Hougui, Guo Guangwen, Mei Jinyu
Zheng Ping Chu Yuexian Yu Ying Sun Laicheng Zheng Guibin
Wu Guoru Chen Hong Wang Wentao Kang Minghua Cai Qiguang
Niu Hongli and Wu Gao see Yang Chengwen, Xiangjian Zhang Zuyi
Zhong Yanxiang Zhu Jingfang Zhu Star Lu Zhilin
Table of contents
1 General...(1)
2 Terminology... (2)
3 Basic regulations...(4)
4 Geological analysis method...(5)
4.1 General provisions...(5)
4.2 Surface geological survey...(5)
4.3 Underground geology sketch...(5)
5 Advanced geological drilling method...(7)
6 Geophysical exploration method...(8)
6.1 General provisions...(8)
6.2 Geological radar method...(8)
6.3 Transient electromagnetic method...(9)
6.4 Elastic wave reflection method...(10)
6.5 Infrared detection method...(11)
7 Leading hole method...(12)
8 Results report... (13)
Appendix A Workflow of Geological Advance Forecast...(14)
Appendix B Geological Sketch Record Form of Working Face...(15)
Appendix C Histogram of Advanced Geological Drilling...(16)
Appendix D Field Record Form of Infrared Detection...(17)
Explanation of terms used in this regulation...(18)
List of Reference Standards...(19)
Attachment. Article description...(20)
1 General
1.0.1 In order to standardize the advance forecast of hydropower and underground engineering geology, ensure the quality of advance forecast, and give full play to the geology
For the application of advance forecast in hydropower and water conservancy and underground engineering, this regulation is formulated.
1.0.2 This regulation is applicable to geological advance prediction of hydropower and underground engineering.
1.0.3 In addition to this regulation, the geological advance forecast of hydropower and underground engineering shall also comply with the current relevant national standards
Provisions.
2 term
2.0.1 Geological advanced prediction
According to the site conditions, one or more of geological analysis, advanced geological drilling, geophysical exploration, advanced pilot hole, etc.
A kind of forecasting method, multi-scale and multi-parameter forecast of the geological conditions in front of the work.
2.0.2 Geological hazard body
Geological bodies that may cause underground engineering collapse, roof fall, water inrush, mud outburst and other geological hazards, such as fault fracture zone, joints
Fractured zones, karsts, soft rock deformation layers, water-bearing structures, etc.
2.0.3 Geological analysis method
Collect preliminary geological data, investigate the geological conditions on the surface and underground, analyze the structural characteristics of the working face, and infer
Good geological body.
2.0.4 Advanced geological drilling method
Use geological drilling equipment to drill holes on the working surface to expose the lithology, structure, karst, and groundwater of the front strata.
2.0.5 Geophysical detection method
Based on the differences in the physical properties of geological bodies, the spatial distribution of geological bodies is determined by observing changes in natural or artificial physical fields through instruments.
Fabric and physical parameters, referred to as geophysical methods.
2.0.6 elastic wave reflection method
Based on the elastic difference between bad geological bodies and surrounding rocks, obtain and analyze the kinematic and dynamic information of elastic reflection waves,
Infer the location, shape and physical properties of bad geological bodies.
2.0.7 ground penetrating radar method
Based on the difference in resistivity and permittivity between bad geological bodies and surrounding rocks, obtain and analyze the propagation characteristics of reflected electromagnetic waves.
Sign, infer the location, shape, and water content of bad geological bodies.
2.0.8 Transient electromagnetic method
Use an ungrounded loop to send a pulsed electromagnetic field to the front of the work surface, measure and analyze the conductivity of poor geological bodies
The secondary induced electromagnetic field caused by the difference can infer the location, shape, and water content of bad geological bodies.
2.0.9 Infrared detection method
Based on the temperature difference between the surrounding rock and the water-bearing body, detect the changes in infrared radiation energy and infer the water-bearing properties of the surrounding rock.
2.0.10 advanced pilot tunnel method
Use the geological conditions revealed by the leading tunnel to infer the lithology, structure, karst, and groundwater of the main tunnel.
2.0.11 Preliminary wave
The first wave received by the sensor in the elastic wave observation system.
3 Basic regulations
3.0.1 Before the implementation of advanced geological forecasts, an implementation plan shall be prepared based on the preliminary survey and design results and related data.
A briefing report should be prepared in time after the test, and a general report of the geological forecast results should be submitted after the project is completed.
3.0.2 When the geological advance forecast is implemented, safety protection measures shall be taken to ensure the safety of personnel and equipment.
3.0.3 The content of geological advanced forecasting shall include.
1 Forecast of fault fracture zone and densely developed fracture zone, infer its location, scope, occurrence and water content;
2 Forecast of water and mud inrush, infer its scope, scale and nature;
3 Karst forecast, infer its development range and scale, and whether it is filled with water;
4 Infer the stability of the surrounding rock, and provide suggestions for design changes, support type adjustments, and secondary lining time.
3.0.4 Geological advance forecasting can be divided into short-distance forecasting and long-distance forecasting, and its method selection shall be implemented in accordance with the following regulations.
1 Short-distance forecasting. if the forecast length is less than 30m, geological analysis method, geological radar method, infrared detection method,
Geological advance drilling method, etc.;
2 Long-distance prediction. The prediction length is 30m～200m, and transient electromagnetic method, elastic wave reflection method, etc. should be adopted.
3.0.5 The underground engineering with one of the following conditions shall carry out comprehensive geological advance prediction.
1 Karst areas such as limestone;
2 Underground engineering with a buried depth greater than 600m;
3 Underground projects with a length greater than 1000m;
4 Underground projects crossing rivers, rivers, lakes and other waters.
3.0.6 The geological advance forecast briefing should be submitted within 48 hours after the completion of the site work, such as karst, water inrush, mud inrush
For major geological anomalies, relevant departments should be notified immediately.
3.0.7 The geological advance forecast should be equipped with professionals and equipment, and the equipment should be qualified by the special department.
Can meet the requirements.
3.0.8 The work process of geological advanced forecasting should be carried out in accordance with Appendix A.
4 Geological analysis method
4.1 General rules
4.1.1 The geological analysis method can be used for advanced geological prediction of underground engineering under various geological conditions.
4.1.2 The geological analysis method shall collect and analyze preliminary survey and design data.
4.1.3 The geological analysis method should adopt surface geological survey and underground geological sketch.
4.1.4 Before forecasting by geological analysis method, the following data of the survey area should be collected.
1 Underground engineering construction scope and underground engineering design conditions;
2 Topographic map;
3 Regional geological maps and regional hydrogeological maps;
4 Overview of the development of geological disasters and distribution map of geological disasters;
5 Monitoring and testing data;
6 Image data.
4.2 Ground geological survey
4.2.1 The ground geological survey should be carried out before the underground geological sketch.
4.2.2 The ground geological survey shall include the following contents.
1 Investigate the occurrence characteristics of rock masses in the survey area;
2 Investigate the development law of fault structures and joints in the survey area;
3 Investigate the development position, trend and shape of the karst zone in the survey area;
4 Investigate the surface water characteristics of the survey area;
5 Confirm the exposure and contact relationship of stratum and lithology on the surface of underground engineering.
4.2.3 According to the ground geological survey results, combined with the preliminary survey and design data, the advanced geological forecasts shall be verified and revised.
Click section.
4.3 Underground geological sketch
4.3.1 Underground geological sketching Geological sketching of the working face shall be carried out.
4.3.2 The underground geological sketch should be carried out in time after the excavation face appears.
4.3.3 The underground geological sketch should include the following contents.
1 Describe and record the geological conditions of the underground engineering working face, including lithology, structure, joints and cracks, hard
Degree, weathering degree, water gushing state, special stratum, etc.;
2 Conduct investigation and analysis of groundwater, including groundwater type, water volume, water outlet distribution, etc.;
3 Suggestions for the classification of surrounding rock of underground engineering.
4.3.4 The geological sketch of the working face should be carried out in the format of Appendix B, and rock samples should be collected in special areas.
5 Advance geological drilling method
5.0.1 The advanced geological drilling method can be used for advanced geological forecasting of underground engineering under various geological conditions.
5.0.2 Percussion drills and rotary core drills should be used for advanced geological drilling. Percussion drills should be used for general areas, but for complex areas.
Rotary core drill.
5.0.3 The advanced geological drilling method shall meet the following requirements.
1 Safety protection measures should be taken.
2 During the drilling process, site drilling records should be carried out and image data should be saved;
3 Columnar results of drilling holes should be drawn.
5.0.4 The number of holes shall meet the following technical requirements.
1 It is advisable to drill 1 hole per exploration cycle for faults and dense joints;
2 For water-rich fracture zones and water-rich karst development areas, 3 to 5 holes should be drilled per exploration cycle. When karst is found, it can be appropriately increased.
5.0.5 The drilling hole depth should meet the following requirements.
1 In areas with complex geological conditions, advance drilling should finish the hole 5m-10m directly in front of the excavation contour line of the underground engineering;
2 During continuous forecasting, the front and back circulation holes overlap by 3m～5m.
5.0.6 The extrapolation angle of the boreholes around the excavation contour line of the underground engineering should be 15°～45°.
5.0.7 The diameter of the borehole shall meet the requirements of core drilling, sampling and in-hole testing, and shall comply with the current "Hydropower Engineering
The requirements of GB 50287 in the Geological Survey Code of Engineering.
5.0.8 The drawing of the advanced geological drilling histogram shall be carried out according to the format of Appendix C.
6 Geophysical exploration method
6.1 General provisions
6.1.1 The geophysical detection methods of advanced geological prediction should adopt electromagnetic wave method, elastic wave reflection method, infrared detection method, etc.
6.1.2 The geophysical prospecting instrument and its auxiliary equipment shall meet the forecast requirements.
6.1.3 The application conditions of geophysical exploration should meet the following requirements.
1 The detection target should have physical differences with the surrounding medium;
2 The site space required for the layout of the observation system shall be available;
3 The background requirements for excitation and acquisition of detection signals should be met.
6.1.4 Under complex engineering geological conditions, a variety of geophysical methods should be used for advanced geological prediction.
6.1.5 The geophysical prospecting records should include instrument verification records, instrument inspection records, original data records, data inspection and evaluation
Records, results review records.
6.1.6 Geophysical data processing and data interpretation should be combined with comprehensive analysis of geology, design and construction data.
6.2 Geological radar method
6.2.1 The geological radar method can be used to detect karsts, fault fracture zones, weak interlayers and poorly water-bearing geological bodies.
6.2.2 The application conditions of the geological radar method shall meet the following requirements.
1 There should be differences in dielectric properties between poor geological bodies and surrounding rocks, with obvious characteristics of electromagnetic wave reflection signals;
2 The test surface should be relatively smooth and barrier-free;
3 There should be no electromagnetic interference sources such as metal components and vehicles near the working face;
6.2.3 When the geological radar method is used for continuous forecasting, the overlap length of the previous and subsequent two times should not be less than 5m.
6.2.4 The forecast distance by geological radar method should be 20m～30m, and the forecast distance in complex geological conditions such as karst and broken zone
The distance should be 10m～15m.
6.2.5 The data collection of the geological radar method shall follow the following principles.
1 The point profile method should be used;
2 The antenna frequency should be 50MHz～100MHz;
3 The survey line layout should adopt two horizontal and two vertical or one horizontal and three vertical;
4 The sampling time window should be.200ns~1000ns, and the sampling interval should be 0.8ns~1.6ns;
5 The antenna supporting equipment should be made of insulating materials;
6 During the test, keep the plane of the working antenna basically parallel to the detection surface and the distance is relatively consistent;
7 The key abnormal area should be repeatedly detected, and the cause should be found out when the repeatability is poor;
8 The inspection record should have the same waveform as the original record, and there should be no obvious change in the abnormal position.
6.2.6 When one of the following situations occurs in the geological radar data, it is considered unqualified.
1 The recorded signal-to-noise ratio is low, and the effective signal cannot be identified;
2 The error between the recorded coordinates and the survey line coordinates is greater than 20cm.
6.2.7 The geological radar data processing method should follow the following principles.
1 Filtering should be used to remove interference waves;
2 Deconvolution should be used to suppress multiple reflection waves;
3 It is advisable to use the offset homing inclined layer reflection wave interface.
6.2.8 The interpretation of geological radar data should include the following.
1 Review and screen for abnormal interference;
2 Judge and identify the characteristics of reflected wave waveform, energy intensity, initial phase, etc.;
3 On the basis of geological analysis, determine the anomalous characteristics and give the results of geological interpretation.
6.3 Transient electromagnetic method
6.3.1 Transient electromagnetic method can be used to detect water-bearing geological bodies.
6.3.2 The application conditions of the transient electromagnetic method shall meet the following requirements.
1 There is a difference in resistivity between bad geological bodies and surrounding rocks;
2 The electrical properties of the surrounding rock are stable, and features such as anomalous range and amplitude can be measured and tracked;
3 There should be no metal components near the receiving station, and electricity for construction should be cut off when collecting.
6.3.3 The transient electromagnetic method field work device should adopt a small area multi-circuit high current transmitting device and a multi-turn small coil or medium
For the receiver of the core shielded magnetic probe, the side length of the transmitting coil should be 2m～5m, and the number of coil turns should be 4～8 turns;
6.3.4 The data collection of transient electromagnetic method shall follow the following principles.
1 Linear, U-shaped or fan-shaped observation methods should be adopted, and the distance between measuring points should be 1m~10m;
2 The coil support frame should be assembled outside the cave, and the construction platform should be retracted 30m~50m from the working surface before the instrument is connected;
3 The coil and the working surface should be kept parallel;
4 The measuring center of the device should coincide with the measuring point, and the error should be less than 10% of the side length of the receiving wire frame;
5 Repeat observations at suspicious points and mutation points.
6.3.5 When the observation curve of a single measurement point is inconsistent with repeated observation or inspection of the shape and amplitude of the observation curve, the data should be judged
As unqualified.
6.3.6 The data processing, interpretation and drawings of transient electromagnetic method shall meet the following requirements.
1 Before data processing, the original data records, measuring point cataloging, and instrument work records should be checked;
2 The influence of the cut-off time of the transmission current should be corrected;
3 Data normalization, filtering, etc. should be processed;
4 The background field and abnormal field should be divided according to the time characteristics of the transient electromagnetic response and the characteristics of the bathymetry curve to determine the geological
Electricity model, dividing anomalies;
5 The drawings should include work layout drawings, apparent resistivity section drawings, and geological interpretation drawings.
6.4 Elastic wave reflection method
6.4.1 The elastic wave reflection method can be used to detect bad geological bodies such as fault fracture zones, karsts, and weak interlayers.
6.4.2 The application conditions of elastic wave reflection method shall meet the following requirements.
1 There is a difference in wave impedance between bad geological bodies and surrounding rocks;
2 Poor geological bodies should be greater than 1/4 of the effective wave wavelength;
3 There should be no vibration interference in the field test.
6.4.3 The prediction distance of elastic wave reflection method should be 150m~200m, and it should be predicted in complex geological conditions such as karst and broken zone.
The reporting distance should be within 100m.
6.4.4 When the elastic wave reflection method is used for continuous forecasting, the overlap length of the front and back should not be less than 10m.
6.4.5 The collection and recording of elastic wave reflection method shall meet the following requirements.
1 The receiving sensor should be fully coupled with the surrounding rock;
2 The excitation and reception should be synchronized, and the reception delay error should be less than 3ms;
3 The number of effective recording tracks should not be less than 75% of the number of working tracks;
4 The record should be clear, and the first wave should jump obviously;
5 The waveform of the inspection record and the observation record should be consistent or similar.
6.4.6 Data processing, interpretation and drawings shall meet the following requirements.
1 The unqualified track should be eliminated;
2 The interference signal should be filtered;
3 The phase tracking and comparison of the reflected wave recording event axis should be carried out;
4 The distance, position, and scale of the reflective interface should be inferred, and the angle with the direction of the hole axis;
5 The drawings shall include the layout plan of the observation system, the offset section plan, the reflection layer extraction plan and the geological explanation plan.
6.5 Infrared detection method
6.5.1 Infrared detection method can be used for qualitative prediction of water-bearing geological bodies.
6.5.2 The application conditions of infrared detection method shall meet the following requirements.
1 There should be infrared temperature difference between bad geological body and surrounding rock;
2 There should be no high-energy heat source fields such as lighting sources, air ducts, and large-scale machine operation near the working face;
3 The ambient temperature should remain stable.
6.5.3 The forecast distance of infrared detection method should be 5m～30m, and the overlap length of the two times should not be less than 5m during continuous forecasting.
6.5.4 The layout of the infrared detection line shall meet the following requirements.
1 The working face should be arranged with 4 measuring lines, each measuring line with 6 measuring points;
2 The hole body should be arranged with 4 to 6 measuring lines, each of which should be 50m to 60m in length, and the distance between measuring points should be 5m.
6.5.5 Infrared detection site work should meet the following requirements.
1 The infrared detection of the working face should be carried out after the excavation of the ballast is completed.
After drying.
2 The number of detections at each measuring point shall be no less than 3 times, and the average shall be taken;
3 In case of numerical mutation point, the detection shall be repeated;
4 Close to the bad geological section, the measuring points should be encrypted;
5 On the same measuring line, the distance between the instrument and the measuring point should be consistent.
6.5.6 Infrared detection data processing, interpretation and drawings shall meet the following requirements.
1 The infrared radiation curve should be drawn to analyze the char...
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