Hydrotechnical engineering


It is neccessry to understanding the safety of the dams and the surrounding environment in order to assure the people's life safety, industry and life. If the large-scale outburst occur, it may impact not only on people's life, but also on national economy itself.

Grasping dams condition in advance makes it possible to study and take countermeasure that prevent serious disaster.

 

 

Project list

 

Dam Inspection

Year
Project name
1995 Nanataki dam geophysical exploration study
1996 Itsuki dam site acoustic wave tomographic investigation
1996 Choukai dam geophysical survey
1997 Resistivity image profiling and other operations at Takase dam
2001 Blasting vibration measurement of  Electric Power Plant at Ootaki dam
2001 Further investigation on sedimentation situation on Shimouke dam.
2001 Observations of bedrock foundation under dam body at Nagai dam.
2002 The behavior research of saddle dam at Sugesawa dam.
2004 Sediment survey business at Shinaki dam.
2004 Concrete deterioration test by seismic prospecting in Kurobe dam
2004 Investigation works on actual situation with concrete deterioration at Tonoyama dam
2005 Study works on the slopes surrounding reservoir at Nunome dam.
2008 Safety survey on Niikappu Power Plant dam gates.
2010 Rankoshi Power Plant headrace safety survey.
2010 Concrete stress measurement of the floodway tunnel and other investigation works at Hidaka Power Plant.
2011 Hydrological observations of 2011 Year related to sedimentation countermeasure facilities at Yahagi dam
2011 Higashinosawa dam concrete degradation level survey
2011 Safety level of behavior of Niikappu Power Plant
2011 Water pressure iron pipe investigation consignment at  Tokachi Power Plant
2012 The upper balancing reservoir dam displacement observation works among the new construction works at Kyogoku Power Plant.
2012 The upper balancing reservoir asphalt slope displacement observation works among the new construction works at Kyogoku Power Plant.
2012 Flood control gate safety survey at No.2 Dam spillway at Uryu Power Plant
2012 Inner space displacement measurement at floodway at Hidaka Power Plant
2012 Consignment of safety level survey of headrace at Yubetsugawa Power Plant.
2013 Inspection work of all automatic borehole inclinometers at Takizawa dam.
2014 Dam concrete deterioration level of Iwasei Water Power Plant.
2014 Investigation Consignment of safety level of dam gates of Ashibetsu Power Plant.
2014 Consignment of inspection work of water pressure iron pipes safety level  at Otaru Power Plant.
2014 Detailed investigation of the repaired parts of the sluice gate at Furukawa dam Kamikawa Power Plant
2014 Toyama Power plant sluice gate and water tank regulating gates safety level investigation.

 

 

Dam work design and countermeasure(Existing dam)

Year
Project name
1996
Study on countermeasure works on the right bank slope at Itsuki dam.
2006 Study on countermeasure works on quarry site slope at Nagai dam.
2009 Consignment of study works of Usagitani No.1 mud-slide and  control barrier deformation countermeasures.
2009 Ariake dam outline design.
2010 Design works on slope protection measures of  Gassan dam.
2011 Design works of landslide  countermeasures at  Yasaka dam
2012 Sediment inflow prevention study and other works at  Sagurigawa dam
2012 Dam improvement project and detailed design of water intake and discharge facilities at Aibetsu dam.
2012 Landslide prevention design works at Miyamae district.
2012 Analysis of slope deformation at Kamaya district of Tedorigawa dam.
2013 Detailed design work at Tsugaru dam old mine countermeasure facilities
2013 Detailed design works on slope protection at Origawa dam

 

 

Seismic evaluation, earthquake environment inspection

Year
Project name
2008
Hattachiike dam body geological survey as part of large-scale earthquake countermeasures.
2008 2-dimensional linear dynamic analysis works of concrete gravity dam among the studies related to seismic capacity inspection in case of large scale earthquake
2013 Seismic Review For Song Tranh 2 Hydropower area(Vietnam)
2014 Dynamic analysis works of the dam among the seismic performance inspection of hydropower equipment for the case of large-scale earthquake.

 

 

Landslide inspection at dam reservoir

Year
Project name
2008
Landslide observation works at Ogami district.
2009 Preliminary land-slide terrain map drawing works of upper stream of Narusegawa river.
2010 Landslide observation works at Ogami district of Tamagawa dam.
2010 Observation of land-slides  surrounding Oitagawa dam reservoir
2011 Land-slide survey works at Tsugaru dam.
2012 Slope investigation analysis works of Owatari dam.
2013 Slope investigation analysis works of Owatari dam.
2014 Inspection works of land-slides surrounding Tamagawa dam.
2014 Observation of land-slides surrounding Isawa dam.
2014 Inspection works of land-slides surrounding Tsugaru dam
2014 Observation of slopes surrounding Toga dam reservoir.
2014 Study of geology around Kanogawa dam reservoir .
2014 Observation of slopes of Yanase dam.

 


Inspection for dam operation and maintenance

Year
Project name
2002
Investigation works of flexibility dam operation test effect at Managawa dam.
2003 Consignment of infiltration line measurement of  Yamakura dam.
2009 Inspection of flexibility dam operation  of  Surikamigawa dam.
2010 Inspection of Yukawa water quality improvement test.
2010 Sediment refreshment inspection works at Shirakawa dam.
2011 Sagurigawa dam control following up and other operations.
2014 Sediment refreshment inspection works at Futase dam.

 


Geological evaluation and material evaluation

Year
Project name
1996
Sheeting joint distribution studies at Kasegawa dam.
1998 Yokokawa dam aggregate storage experiment
2002 Dam material study works.
2002 Geology comprehensive analysis works of redevelopment project at Amagase dam
2004 Analysis of geology of dam site.
2004 Consignment of analysis of geological survey of Togusa dam.
2007 Nagai dam foundation comprehensive evaluation works.

 


Works related to the dam environment

Year
Project name
2003
Atmospheric environment survey related to Hommyo-gawa dam.
2009 Yoshinogawa upper basin environment studies.
2011 Environment impact assessment of old mine countermeasures at Tsugaru dam.
2011 Studies on environmental changes at lower basin of Tsugaru dam
2012 Study and evaluation of fauna of Toga dam
2014 Surikamigawa dam waterside field survey(fish species,space utilization survey)