GB/T 36072-2018 in English
VALIDSurveying and prospecting of active fault
- Issued on:2018-03-15
- Implemented on:2018-10-01
- File Format:PDF
- Delivery:Within 1 day
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| Standard No: | GB/T 36072-2018 |
| Document status: | VALID |
| Title in English: | Surveying and prospecting of active fault |
| Title in Chinese: | 活动断层探测 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2018-03-15 |
| Implemented on: | 2018-10-01 |
| ICS Classification: | 91.120.25-Seismic and vibration protection |
| Chinese Classification: | P15-Engineering seismic resistance |
| Professional Classification: | GB-National Standard |
| Related Keywords: | active fault
active fault detection active fault introduction analysis upper fault point seismic exploration blind fault |
| Related Topics: | detecting animals
animal detection automatic dose detection fault principle active layer Late Quaternary fault detection detecting animals animal detection GBT36072 GB/T 36072-2018 Active fault detection db-T15 |
《GB/T 36072-2018活动断层探测》由TC225（全国地震标准化技术委员会）归口，主管部门为中国地震局。
Introduction
Analysis of the core content of the standard
Definition of key terms
Active fault: refers to a fault that has been displaced in the past 120,000 years, including late Pleistocene faults (Q3) and Holocene faults (Q4). This standard particularly emphasizes the detection requirements of hidden active faults, that is, faults covered by the Quaternary system and without traces on the surface.
Comparison of technical systems
| Detection method | Applicable scenarios | Positioning accuracy | Typical workload |
|---|---|---|---|
| Shallow seismic exploration | Blind fault (buried depth 5-300m) | Horizontal error ≤15m | Spacing between survey lines ≤2.5km |
| Joint drilling profile | Quaternary coverage area | Vertical error ≤0.2m | 3 holes on each side of the fault, spacing 5-45m |
| Geological and geomorphological mapping | Surface exposed faults | Horizontal error≤5m | Observation point spacing≤500m |
Key points for standard implementation
Typical application cases
Taking the detection of active faults in a city in North China as an example, the shear wave reflection exploration (track spacing 2m) combined with cross-fault drilling (spacing 8m) was used to accurately calibrate the upper fault point to a depth of 23.5m, and determined that the fault was a late Pleistocene active fault (Q3) with a slip rate of 0.12mm/a.
Technology Evolution Analysis
This standard integrates my country's 20 years of experience in active fault detection. The main technological breakthroughs include:
- Establish a multi-scale detection system (1:250,000 regional evaluation → 1:50,000 target area positioning → 1:10,000 precise positioning)
- Standardize the four-dimensional database structure (spatial data + attribute data + document data + metadata)
- Introduce the probabilistic hazard assessment model (characteristic earthquake recurrence interval calculation)
Implementation Suggestions
- Preliminary preparation: Prioritize the collection of 1:50,000 geological maps, historical earthquake catalogs and InSAR deformation data
- Method combination: "Seismic exploration + drilling verification" is used in concealed areas, and "remote sensing interpretation + trench exploration" is used in exposed areas
- Quality control: Ensure that each activity determination point has ≥2 valid age data (14C or OSL)
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