Research Results / Technical Information

The below is the technologies PWRI has developed.

Following technologies are mature and aggressively have been promoted. For further details, visit the following link. (Japanese only)

Technology	Technological Field	Technological Characteristics
The ALiCC (Arch action Low improvement ration Cement Column) method	Common	A design technology for low improvement ratio soft-ground stabilization using the idea of arch action
The Invairowan method	Common	An environment-friendly technique for on-site removal of coating film of steel structures
Pressurized fluidized bed incinerator with turbocharger	Sewage	A technology to combust sludge from sewage plants at low energy and generate new energy
Gas-liquid dissolving apparatus	Dam / River	Technology improving dissolved oxygen concentration at bottoms of dam reservoirs and lakes
Subsurface water level observation system for levee	River	A technology to bore a subsurface water level observation hole in a short time
The new high capacity micro pile method	Road	A technology to construct pile foundation even in narrow spaces
Multi-point slope failure monitoring system by optical fiber sensor	Road	A technology to measure slope displacement in wide areas using optical fiber sensors
Gravity thickening technology of sewage sludge using water path forming poles	Sewage	A technology to increase sedimentation rate of sewage sludge particle and provide denser thickened sludge
Exploration technology using Land Streamer	Common	A high resolution imaging technology for the near-surface
Advanced telemetry system	River	An automated investigation technology for migration routes of wild animals
Ultrasonic testing method for detecting fatigue crack in existing orthotropic steel decks	Road	Ultrasonic testing technique for detecting invisible fatigue crack at weld of orthotropic steel decks
Earthquake damage detection / evaluation system	Road	A technology to detect and evaluate the earthquake damage of bridges immediately
Groundwater investigation methods such as heating type groundwater prospecting method	Common	Heating type groundwater prospecting method using heater and temperature sensor, and groundwater tracing method using high density oxygen
The anti-corrosive reinforcement method for heavy duty coatings of steel bridge by titanium foils	Road	A technology to improve corrosion protection performance of corner parts that are hard to coat and rust easily by application titanium foil sheets
Test method for quick measurement of concrete unit water content using air meters	Common	A technology to evaluate concrete unit water content quickly and easily
Application of ecology cement concrete in construction	Common	Ecology cement can reduce environmental burden of municipal waste products
The High Grade Soil methods	Common	The methods to use low quality soil at construction site
Toxicity biosensor	River	A continuous monitoring system to detect toxic substances in water
Creating / checking system for HQ rating curve (HQ system)	River	A technology to obtain convenience in practical businesses and support creation of H-Q curve formula by data saving   HQ system site
Flow rate observation technology using non-contact current meter	River	A technology to solve problems including shortage of manpower, discontinuity of observation value and indeterminateness of peak flow rate
Speeding up and downsizing technology of water conduit for pump	River	A technology to downsize facilities of drainage pumping station
The seepage control method by improvement of soils around sluiceways	River	A technology to construct shielding membrane by improvement of soils against cavity and bleeding channel around sluiceways
The fracture direction controlled grouting method	Dam	A technology to improve foundation in imperviousness and strength and to effectively inject grout by control of direction of progressing fractures generated by grout
Boulder block fishway	River / Erosion and torrent control / Dam	A channel block to facilitate diversified velocity distribution depending on conditions and to reduce costs
Absorption storage method for digestion gas	Sewage	A technology to store digestion gas 20-30 times as much as usual low pressure technology
Erosion control method by bagasse mixing	Erosion and torrent control	An erosion control technology using bagasse (sugarcane trash)
Survey method for fissures in a rock mass by air tracer test	Road	A technology to correctly evaluate and estimate distribution of fissures and collapse-prone blocks in rock mass slope
Vibration reduction pavement	Road	A technology to reduce traffic vibration
Variant cross-section shield tunneling method	Road	A technology to excavate rational configuration tunnels suitable for high-degree application of underground space
Tunnel cross-section expansion method	Road	A tunnel cross-section expansion technology to shorten work period, reduce construction cost and shorten traffic control period compared to conventional method
Eco-friendly antifreezing technology for winter road surface	Road	Non-chloride antifreezing agent and its effective spreading
Structure antifouling technology	Road	An useful technology for maintaining structures finely

New Technologies Information Search System helps engineers at construction site and technology developers to search PWRI's technologies information by technical fields and categories widely.