CJJ 7-1985 Urban Geophysical Exploration Specification CJJ7-85 CJJ7-1985 Standard download decompression password: www.bzxz.net

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Ministry Standard of Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China
Urban Exploration and Geophysical Exploration Specification
CJJ7—85
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Ministry Standard of Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China
Urban Exploration and Geophysical Exploration Specification
CJJ7—85
Editor: China Municipal Engineering North China Design Institute Approval Unit: China Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Trial date: July 1, 1985
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Notice on Issuing "Urban Exploration and Geophysical Exploration Specifications" (85) Chengshezi No. 211
According to the requirements of the former Urban Construction Bureau (81) Chengkezi No. 15, the "Urban Exploration and Geophysical Exploration Specifications" (CJJ7-85) was compiled by China Municipal Engineering North China Design Institute in conjunction with relevant units. After review by our department, it was approved as a departmental standard and will be tried out in urban exploration work from July 1, 1985. During the trial process, if there are any questions or comments, please inform the standard management unit, China Municipal Engineering North China Design Institute, in writing. Ministry of Urban and Rural Construction and Environmental Protection
April 13, 1985
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Engineering Construction Standards Full-text Information System
Urban Exploration and Geophysical Exploration Specifications (CJJ7-
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Basic Conditions and Application Scope of Geophysical Exploration
Geophysical Exploration Tasks and Outline||tt ||Electrical Exploration
Section 1
Section 2
Section 3
Section 4
Section 5www.bzxz.net
Section 6
Chapter 5
Instruments and Equipment
Measurement Work
Resistivity Method
Natural Electric Field Method
Charging Method
Induced Polarization Method
Seismic Exploration
Section 1|| tt||Instruments and Maintenance
Section 2 Field Work
Section 3 Indoor Work
Chapter 6
Vibration Test in Engineering Survey
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Section 1 Test of Strong Vibration of Block FoundationsSection 2 Test of Ground Pulsation
Section 3 Test of Ground Wave Velocity
Chapter 7 Magnetic Survey
Section 1 Instruments and Equipment|| tt||Section 2 Field Work
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Section 3 Indoor Work
Chapter 8 Gravity Exploration
Section 1 General Technology
Section 2 Instruments
Section 3 Field Work
Section 4 Indoor Work
Chapter 9 Radioactive Exploration Exploration (Gamma Measurement) Section 1 Instruments and Equipment ·
Section 2 Field Work
Section 3
Indoor Work
Chapter 10 Geophysical Well Logging
Section 1
Electrical Well Logging
Section 2
Section 3
Radioactive Well Logging ·
Thermal Logging (Parallel Temperature Measurement)
Section 4
Parallel Diameter Measurement…
Section 5
Chapter 11
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
Parallel oblique measurement.…
Geophysical prospecting results report
Reference table of physical property parameters of common rock media
：110
：114
Equipment form of resistivity method and calculation of device coefficient K Formula 146 Reference value of network density for electrical, magnetic, gravity and radioactive exploration
Reference outline for writing geophysical exploration outline
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Geophysical exploration working methods, legends and symbols
Geophysical exploration record format
Geophysical exploration instrument usage chart
Field record book for electrical depth sounding method
Work record of electrical surface method
Work record of natural electric field method·||t t||Engineering 2 Construction Standard Full-text Information System
：150
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(IX)
(XII)
(Thirteen)
(Fourteen)
Fifteen)
(Sixteen)
Appendix Seven
Appendix Eight
Charging Method Work Record
Induced Polarization Method Electrical Sounding Work Record． 65Seismic exploration work records
Ground wave velocity work records
Magnetic exploration work records168
Gravity exploration work records
Gamma measurement work records
Electrical well logging work records
Radioactive well logging work login chapter...
Well temperature measurement work login chapter
Parallel diameter measurement work login chapter
Parallel inclination measurement record table...
Measured table of absolute magnetic field elements in major cities across the country177Reference outline for writing geophysical exploration results report
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Main symbols
A——Electric current (ampere)
Standard source Constant (radioactive measurement)
A——Amplitude of foundation (forced vibration)
Horizontal amplitude of foundation center of gravity
(forced vibration)
A——Amplitude of basis set swing (forced vibration)Vertical amplitude of foundation (forced vibration)
C——Equal pressure elastic coefficient of foundation (forced vibration)-Equal shear elastic coefficient of foundation (forced vibration) C
-Non-uniform pressure elastic coefficient of foundation (forced vibration)Attenuation degree (induced polarization)
Damping ratio (forced vibration)
-Frequency (forced vibration)
Fourier spectrum (ground pulsation)
——Deepth of detection object (electrical depth sounding)
-Current intensity (electrical well logging)
Gamma ray intensity (radioactivity)
J. —Apparent excitation ratio (excitation polarization)
J,——Residual magnetization intensity (magnetic method)
——Device coefficient (electrical depth sounding)
Magnification (vibration test)
Magnetic susceptibility (magnetic method)
Grid value (gravity)
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K. ——Equal pressure stiffness of foundation (forced vibration) KEqual shear stiffness of foundation (forced vibration)
Kg——Non-uniform pressure stiffness of foundation (forced vibration) M—Relative mean square error of electrical sounding point
Relative mean square error of apparent polarization ratio (induced polarization)Relative error of apparent excitation ratio (induced polarization)Relative error (electrical sounding)
Horizontal ratio (electrical logging)
Number of wire sides (electrical measurement)
Number of observations (electrical method)
Number of electrode distances (electrical sounding)
Number of inspection points (electrical sectioning) Surface)
Exciting disturbance force (forced vibration)
Longitudinal conductivity (electrical method)
Transverse resistance (electrical method)
Measurement point temperature (thermal logging)
Vertical distance reading time (wave speed)
Voltage (V)
-Groundwater flow rate (electrical method)
Lowering speed (thermal measurement)
△ correction-Relative mean square error of the average value of gravity increment-Relative mean square error of the average reading grid difference (gravity) A-Route-
-Relative error of amplitude (electrical logging)
6:1. Statistical fluctuation relative error (radioactive measurement) 8. Attenuation ratio (induced polarization)
Mean square error (magnetic method)
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Observation accuracy (gravity)
eObservation-Mean square error of single observation at measuring point (gravity) 8Measurement-Mean square error of measuring point (gravity)
Total accuracy of Bougainville gravity anomaly
-Relative error (magnetic method)
Polarizability (induced polarization)
Apparent polarizability (induced polarization)
-Inclination (magnetic method)
2-Resonant circular frequency of vertical vibration of basis set (strong Forced vibration)-apparent resistivity (electrical method)
-density value (radioactive logging)
-declination angle (magnetic method)
porosity (radioactive logging)
circular frequency of vibration generator rotation (forced vibration) solid angle (radioactive exploration)
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Engineering Construction Standard Full Text Information System
Chapter 1 General Provisions
Article 1.0.1 This specification applies to hydrogeological exploration and engineering geological exploration for urban construction. The geological exploration for rural construction and environmental protection can be adopted as a reference.
Article 1.0.2
Urban exploration and geophysical exploration (hereinafter referred to as geophysical exploration) must adhere to the view of quality first. Seek truth from facts, respect science, conduct in-depth field investigation and research, and correctly reflect the objective laws of hydrogeology and engineering geology. Article 1.0.3 Geophysical exploration is one of the important technical means of geological exploration. In geological exploration, making full use of geophysical means and rationally selecting and using geophysical methods can significantly improve the quality of exploration, accelerate progress and reduce costs.
Article 1.0.4 Geophysical work must be closely integrated with geological work. A comprehensive method of multiple geophysical explorations should be adopted to overcome the conditionality, multi-solution and regionality of a single method to achieve better exploration results. Article 1.0.5 The general procedure of geophysical exploration should be to accept tasks, collect data (including geological data, geophysical data, satellite images and aerial images, etc.), conduct on-site surveys, compile outlines, test methods, produce in the field, organize internal work, and submit data results. Under special circumstances, the above work procedures can be simplified with the consent of the leaders.
Multiple geophysical exploration work should actively apply and promote new technologies and new methods. Article 1.0.6
Attach importance to the verification of geophysical exploration results and the return visit of geological effects, conscientiously summarize experience, and continuously improve the technical level of geophysical exploration work. Engineering Construction Standard Full Text Information System
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When applying this specification, it shall also comply with the relevant provisions of the current "Water Supply Hydrology Specification (TJ27-78)", "Industrial and Civil Construction Engineering Geological Survey Specification (TJ21-77)", "Engineering Survey Specification (TJ26-78)", "Urban Survey Specification" (CJJ8-85) and other current specifications. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 2
Basic conditions and application scope of geophysical exploration
Article 2.0.1
Basic conditions for geophysical exploration:
1. The object to be detected and its surrounding rock must have obvious differences in physical properties (i.e. electrical, elastic, magnetic, density, radioactivity, etc.). 2. The object to be detected has a certain scale in terms of burial depth, surrounding rock, etc. 3. There are no interference factors. Or although there are interference factors, the anomalies caused by the object to be detected can still be distinguished.
4. There is no influence of terrain, ground objects, and vegetation. Or although there is an influence, it will not cause the degree to which the geophysical field work cannot be carried out. There is a relative relationship between the various basic conditions of geophysical exploration. For example, when the difference in physical properties is small, the relative burial depth must be shallow to be effective. Article 2.0.2 Geophysical exploration is used to solve or study the following geological problems: 1. Determine the burial depth of bedrock.
2. Determine the distribution and law of gravel layers, clay layers, and permafrost layers in the Quaternary System.
3. Determine the location of hidden ancient riverbeds and buried alluvial fans. 4. Determine the burial depth of groundwater and its flow direction and velocity. 5. Determine the location of hidden faults, fracture zones, and karsts. 6. Determine the recharge relationship between surface water and groundwater and the boundary between underground salt and fresh water (including the boundary of seawater intrusion).
7. Determine the mineralization of aquifers in mud boreholes, the interface between fresh and salt water, and geological stratification.
8. Determine the influence radius and effective length of the filter during pumping. Engineering Construction Standard Full Text Information System
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