Charles Machine Works Inc The 2150GR250 사용자 설명서
2150GR Ground Penetrating Radar
054-139 - Rev. 1
34/36
APPENDIX A - THE PRELIMINARY INVESTIGATION
The first fundamental phase for any field survey consists in the preliminary investigation: its
scope is to acquire all the necessary information for the logistics of the operation, taking into
account the objectives to be performed.
scope is to acquire all the necessary information for the logistics of the operation, taking into
account the objectives to be performed.
In the specific case of a GPR investigation for underground utilities searching, the first thing
to consider is the accessibility of the site, in terms of taking into account the space available
for the passage of the antenna trolley and considering any architectural obstacles that could
cause an obstacle to the data acquisition phase. Often, in fact, the investigation is performed
in streets, squares and on pavements with a relatively high level of urban traffic, and above
all, in the presence of randomly parked cars.
to consider is the accessibility of the site, in terms of taking into account the space available
for the passage of the antenna trolley and considering any architectural obstacles that could
cause an obstacle to the data acquisition phase. Often, in fact, the investigation is performed
in streets, squares and on pavements with a relatively high level of urban traffic, and above
all, in the presence of randomly parked cars.
The main points to be considered during this phase are described below:
¾ Specific permissions must be obtained (access to pedestrian zones, permission to
interrupt the traffic flow, etc.)
¾ Any difficulties in accessing the site must be considered
¾ The space available
¾ The presence of parked cars
¾ The level of traffic
It is the task of the user to take these points into consideration when programming the work.
APPENDIX B - THE TECHNICAL MAPS
Technical maps of the existing utilities are produced by the various utilities companies.
These give general indications in a schematic way about the type and position of the utilities
that are managed and/or have been constructed by them.
These give general indications in a schematic way about the type and position of the utilities
that are managed and/or have been constructed by them.
These maps can be requested by faxing or writing to the cartographic or planning office of
the companies, specifying clearly the streets and areas of interest.
the companies, specifying clearly the streets and areas of interest.
The most important types of utilities (which may be managed by different agencies) to be
considered are:
considered are:
¾ Public Street Lighting
¾ Low, Medium and High Voltage Electricity Cables
¾ Water supply
¾ Gas
¾ Telephone Cables
¾ Sewers
Even though they may be very generic, these maps represent an important support during
the extraction and data interpretation phases, since they give the user a first idea, if not an
exhaustive one, of the utilities that are present. For this reason, it is important that the user
activates the procedures for obtaining these maps well in advance to make sure that they
will be available during the data extraction phase.
the extraction and data interpretation phases, since they give the user a first idea, if not an
exhaustive one, of the utilities that are present. For this reason, it is important that the user
activates the procedures for obtaining these maps well in advance to make sure that they
will be available during the data extraction phase.