DB/T 60-2015 English PDF (DBT60-2015)

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DB/T 60-2015: Specification for the construction of seismic station Seismic intensity rapid reporting and earthquake early warning station
DB/T 60-2015
EARTHQUAKE INDUSTRIAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.120.25
P 15
Specification for the construction of seismic station
Seismic intensity rapid reporting and earthquake early
warning station
ISSUED ON: JANUARY 28, 2015
IMPLEMENTED ON: MARCH 01, 2015
Issued by: China Earthquake Administration
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Station site selection ... 8 
5 Station address testing ... 9 
6 Station communication and lightning protection requirements ... 10 
7 Observation pier construction ... 11 
8 Observation well construction ... 13 
9 Observation room construction ... 13 
10 Station security protection construction ... 15 
11 Equipment configurations ... 15 
12 Data archiving ... 16 
Annex A (normative) Ground pulsation test ... 17 
Annex B (informative) Schematic diagram of observation pier on bedrock site
... 19 
Annex C (informative) Schematic diagram of observation pier on soil site ... 21 
Annex D (informative) Observation well hole sealing diagram ... 22 
Bibliography ... 23 
Specification for the construction of seismic station
Seismic intensity rapid reporting and earthquake early
warning station
1 Scope
This Standard specifies station site selection, station address testing, station
communication and lightning protection requirements, observation pier
construction, observation well construction, observation room construction,
station security protection construction, equipment configurations, and data
archiving in the construction of seismic intensity rapid reporting and earthquake
early warning station.
This Standard is applicable to new seismic intensity rapid reporting and
earthquake early warning station at national, provincial, city and county levels.
Reconstructed and expanded seismic intensity rapid reporting and earthquake
early warning station shall refer to this Standard for use. The rapid vibration
reporting and early warning station construction in other fields can refer to this
Standard for use.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 19531.1-2004, Technical requirement for observational environment of
seismic stations Part 1: Seismometry
GB 50057-2010, Design Code for Protection of Structures against Lightning
GB 50169-2006, Code for construction and acceptance of grounding
connection electric equipment installation engineering
GB 50223-2008, Standard for Classification of Seismic Protection of Building
Cons
GB 50343-2012, Technical code for protection of building electronic
information system against lightning
earthquake.
[DB/T 59-2015, definition 3.1.4]
3.6 seismic intensity instrument
A special instrument for monitoring ground vibration and measuring instrument
seismic intensity.
[DB/T 59-2015, definition 3.1.2]
3.7 [seismic intensity rapid reporting and earthquake early warning]
reference station
A seismic station that continuously observes ground motion speed and
acceleration, conducts real-time transmission of observed waveforms, that is
used for earthquake early warning and can be used for seismic intensity rapid
reporting.
3.8 [seismic intensity rapid reporting and earthquake early warning] basic
station
A seismic station that continuously observes ground motion speed and
acceleration, conducts real-time transmission of observed waveforms, that is
used for seismic intensity rapid reporting and can be used for earthquake early
warning.
3.9 [seismic intensity rapid reporting and earthquake early warning]
simple station
A seismic station that continuously observes ground motion speed and
acceleration or conducts real-time transmission of observed waveforms or
transmits observed waveforms or vibration characteristics parameters (such as
arrival time, peak value, cycle of excellence) when an earthquake is triggered,
that can be used for seismic intensity rapid reporting and earthquake early
warning.
3.10 [seismic intensity rapid reporting and earthquake early warning]
station
A general term for reference station, basic station, simple station of seismic
intensity rapid reporting and earthquake early warning.
3.11 seismic observation system time delay
Time required for a seismic observation signal to reach the receiving end from
generation, including the sum of the time delays of seismometer detection
signals, data collector conversion and packaging signals, signal transmission
bedrock.
4.3.2 The location conditions of the observation site of the basic station shall
comply with the provisions of 4.1.1 in DB/T 17-2006.
4.3.3 The basic station shall avoid sources of vibration that may affect
observation, such as large motors, pumping stations, generators, tower
structures, heavy vehicle access, large pipelines, airports and railways. The
root-mean-square value of the maximum background vibration acceleration
noise of the ground pulsation of the basic station in the frequency band of 1Hz
~ 20Hz shall not be greater than 0.01m/s2, preferably less than 0.001m/s2.
4.3.4 The basic station shall choose a location with real-time and continuous
communication conditions.
4.4 Simple station
4.4.1 The simple station shall be built on the ground. If the simple station is built
on a building, the building shall be a small building of two floors or below and
there is no backfill soil above 1m at the foundation.
4.4.2 The location conditions of observation site for the simple station that is
built on the ground shall comply with the provisions of 4.1.1 in DB/T 17-2006.
4.4.3 When the simple station is used for earthquake early warning, the root-
mean-square value of the maximum background vibration acceleration noise of
the ground pulsation in the frequency band of 1Hz ~ 20Hz shall not be greater
than 0.01m/s2, preferably less than 0.001m/s2.
4.4.4 When the simple station is only used for seismic intensity rapid reporting,
the root-mean-square value of the maximum background vibration acceleration
noise of the ground pulsation in the frequency band of 1Hz ~ 20Hz shall not be
greater than 0.02m/s2.
4.4.5 The simple station shall choose a location with real-time communication
conditions.
5 Station address testing
5.1 The reference station that is built on the ground shall be subject to the
observation and calculation of environmental ground noise. The methods for
observation and calculation of observation environmental ground noise shall be
in accordance with the provisions of Annex A in GB/T 19531.1-2004.
5.2 The reference station that is built under the well shall be subject to
engineering geological test. The engineering geological test shall comply with
shall be less than 10-6. The seismic observation system time delay shall not be
greater than 2.5s.
6.1.3 Transmission requirements for simple station
6.1.3.1 The communication rate of simple station shall not be less than 56kbps.
6.1.3.2 The simple station shall choose wired transmission link. The channel bit
error rate of the wired transmission link shall be less than 10-7. The seismic
observation system time delay shall not be greater than 1.5s.
6.1.3.3 When the communication re...