This technology is a surface improvement system designed for in-situ remediation of contaminated benthic sediments without dredging. It consists of a stabilizer spreader that disperses stabilizers underwater over the target area, and a disturbance and mixing unit that mixes the stabilizers with the contaminated sediments to induce bioturbation.
Existing monitored natural recovery requires isolating the target water body, which is difficult to apply in land-scarce regions like Korea. Environmental dredging is time-consuming and costly due to the processing, recycling, and post-management of the excavated contaminated sediments. In-situ treatment methods using geotextile membranes are limited by their effectiveness being restricted to the surface layer and the difficulty of handling and installing the textiles.
This technology features multiple spreader pipes that rotate radially around a supply pipe divided into channels by distribution vanes, with an angle adjustment unit that modifies the deployment angle and rotation speed to control the spreading range. The blades of the disturbance and mixing wheel attached to the rotating shaft have adjustable lengths via fixing holes to match sediment thickness, and feature curved ends. A curved, open-bottom barrier structure isolates the work area, while cameras, turbidity meters, and flow sensors allow for real-time monitoring. It can be applied to ports and coastal areas contaminated with heavy metals and organic matter, inland rivers and lake beds, and waterways near industrial complexes, providing immediate remediation without the costs of dredging and disposal, while containing turbidity within the work zone.
This invention was developed with support from the Ministry of Environment for the development of in-situ remediation technology for contaminated sediments using eco-friendly, high-efficiency stabilizer injection and the ecological functions of benthic organisms.
This technology is a room-temperature curing silicone reinforcement member designed to prevent gaps within concrete. It features a cylindrical body with vertically bent anchoring sections at both ends, finished with hemispherical anti-void caps.
While concrete is strong under compression, it is weak in tension, making long members prone to cracking. These cracks allow water and moisture to penetrate, leading to corrosion and structural damage. Although elastic concrete compositions or those containing elastic particles have been proposed, they often require special additives or fail to adequately address tensile strength reinforcement.
This technology features longitudinal compression holes within the body and anchoring sections, fitted with disc-shaped elastic supports. The member is inserted in a compressed state and expands once pressure is released, ensuring a tight fit against the concrete. The compression holes connect to the exterior, and the interior angles where the body meets the anchoring sections are curved to eliminate voids. Additionally, elliptical elastic streamlined members are included to enhance ductility against vibrations. Suitable for long-span slabs, beams, bridge decks, and seismic-resistant public buildings, this solution allows for the use of standard concrete mixes while significantly increasing resistance to tensile cracks and vibration damage.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of low-heat cement manufacturing and utilization technology that replaces more than 5 wt.% of limestone using non-carbonate raw materials.
This technology is a cable-supported bridge, such as a cable-stayed or suspension bridge, where multiple pylons are connected to a perpendicular girder by cables. It features dampers installed between the pylons and the girder to attenuate movement when the girder shifts relative to the pylons.
Long-span bridges must control flutter caused by the interaction between bridge vibration and wind. Conventional methods have relied on streamlining the girder cross-section, creating openings, or installing wing-type vibration dampers or TMDs. However, these methods have limitations in increasing the critical flutter wind speed for ultra-long-span bridges exceeding 2km, and they often lead to increased construction costs due to unnecessarily large girder cross-sections.
This technology connects both ends of the damper to rotate around an axis perpendicular to the longitudinal direction of both the pylon and the girder. The dampers are positioned in pairs at the edges of the girder, oriented parallel to the pylon's longitudinal axis. Damping effects can be further enhanced by adding auxiliary dampers between the girder and the piers, as well as elastic stopper members attached to the girder at a distance from the pylons. Applicable to offshore long-span cable-stayed bridges, floating suspension bridges, and bridges in high-wind regions, this solution increases the critical flutter wind speed without modifying the girder cross-section. It also reduces girder end expansion and contraction caused by live and wind loads, thereby extending the service life of expensive components like expansion joints.
This technology is an anchorage reinforcement structure that connects a ductile rod—designed to induce ductile failure—longitudinally to the top of an anchor embedded in a concrete member through a base plate, then covers it and secures it with a rod fastener.
Current building design standards require an elongation length of at least eight times the anchor diameter to ensure ductile failure of the steel occurs before brittle failure of the concrete under high seismic loads. However, many existing anchors lack this required length. Increasing the number of anchors to compensate for insufficient seismic capacity is often cumbersome and costly.
This technology features a ductile rod with an open-bottom hollow core for anchor insertion. The internal threads at the bottom of the hollow core connect to the exposed anchor, while the external threads at the top connect to a rod fastener, with a chamfer formed at the top of the hollow. The installation holes in the base plate and cover are larger than the anchor to maintain clearance, and the ductile rod matches the anchor's cross-section and outer diameter. Applicable to seismic retrofitting of equipment and piping anchors in aging buildings, plant machinery foundations, and non-structural element remodeling, it converts existing anchors into ductile, elongated ones without removal or additional drilling, preventing sudden concrete failure during earthquakes.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport for the development of seismic performance evaluation and reinforcement design technology for steel plants.
This technology is a bridge structural performance measurement method that collects data from GPS receivers installed on the tops of multiple bridge towers, extracts only the dynamic frequency band using a filter to determine dynamic displacement, and then calculates the damping ratio and fundamental frequency through RD signature and IRF correction.
Bridge performance manifests as fixed, semi-fixed, and dynamic movements depending on wind speed, temperature changes, and traffic volume. Among these, it has been difficult to accurately isolate and measure the dynamic components that significantly influence structural performance. While precise management of tower behavior is required even during normal operations, there has been a lack of simple and accurate methods to achieve this.
This technology divides dynamic displacement into multiple time windows to obtain RD signatures for each segment relative to a reference segment. It then removes outliers caused by noise, sensor malfunctions, or environmental fluctuations from the IRF values using Mahalanobis distance analysis, and calculates dynamic characteristics using one of the LSCE, HEM, or ERA algorithms. The distance between towers ranges from 100 to 1,000 meters, and results are verified by comparing them with displacement data obtained from an accelerometer on one of the towers. Applicable to continuous monitoring of cable-stayed and suspension bridge pylons, structural health monitoring of long-span bridges, and safety inspections following earthquakes or high winds, it allows for accurate tracking of changes in bridge vibration characteristics using only GPS data, without the need for extensive additional instrumentation.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport for the commercialization of PC retaining walls with integrated foundations using the Pre-Stress method.
This technology is a blind that adjusts its height by winding a screen around an upper take-up rod rotating within an upper ceiling frame. It features a noise-reducing support rod with embedded magnets at the bottom, which uses magnetic force to secure or detach the screen from the window frame.
While blinds are widely used to block sunlight and provide privacy while enhancing interior aesthetics, they often cause noise when windows are left open, as the wind causes the screen to sway and repeatedly strike the window frame.
This technology features a rotating rod inside the support rod case, with magnets of opposite polarities embedded along its length. Rotating the rod to face the same polarity as the window frame magnet creates repulsion, keeping the screen detached, while rotating it to the opposite polarity creates attraction, securing it to the frame. The window frame magnet can be embedded or attached as a removable unit. Suitable for apartment and residential living room windows, office and classroom ventilation windows, and hotel room windows, it allows for a quiet indoor environment without the rattling of screens flapping in the wind, even with windows open. It is also easy to install on existing frames by simply attaching the magnetic plate.
This technology is a subway door safety system that attaches first and second conductive rubber strips to the edges of both door panels. It detects changes in resistance based on the contact area between the two rubber strips as the doors close to determine if the doors have closed properly or if an object is caught between them.
Existing subway door sensors are installed only at the top and signal the train to depart if the gap is 7.5mm or less, failing to detect thinner objects. Because there are no sensors at the bottom, the system often misses cases where items like shoes or stroller wheels are caught while the top closes, leading to frequent accidents involving trapped limbs, bags, or clothing.
This technology uses the minimum resistance value measured when the two rubber strips make full contact as a baseline. If the detected resistance is higher, it identifies an obstruction or an open door; if it matches, it confirms a normal closure. This allows the system to detect issues along the entire length of the door, regardless of the object's position or thickness. If an abnormal closure is detected, the mechanism immediately reopens the doors and triggers an audible or visual alarm. Applicable to subway doors, platform screen doors, elevators, and automatic bus doors, it can detect thin items like clothing or stroller wheels that existing sensors miss, ensuring doors reopen before departure.
This technology features an excavator equipped with a work attachment on a mobile base that allows for interchangeable auger screws. It drills by first installing a hollow first auger screw into the ground and then inserting a second auger screw through its center. A restraint device on the mobile base secures the first auger screw to prevent the equipment from lifting.
Existing backhoe-mounted drilling screws used for pre-drilled pile foundations, soft ground soil-cement grouting, and slope soil nailing often suffer from the front wheels lifting due to ground reaction forces during drilling. This lifting causes misalignment, degrading the quality of piles and nails, and limits drilling depth as reaction forces increase with depth.
This technology uses a restraint device consisting of first and second restraint nuts threaded onto the first auger screw, a pair of parallel bars contacting both sides of the auger between the nuts, a drawbar extending from the mobile base to connect the parallel bars, and a connecting member on the opposite side to lock vertical movement between the auger and the equipment. The work attachment includes a reducer unit for the auger screw and an operating unit. Applicable to pre-drilled pile foundations, soil nailing for road/railway cut slopes, and deep soil mixing, it allows small drilling rigs to maintain precise drilling alignment at depth while retaining site mobility.
This technology represents the reference shape of an irregular structure as a radius function based on angle and height from the central axis. It calculates the radius change caused by concrete lateral pressure and pre-compensates the formwork shape accordingly. A program on an information processing device handles everything from modeling the reference shape to calculating the compensation values.
F3D irregular formwork, which uses 3D printers to cut and stack EPS panels, is lighter, cheaper, and faster to produce than wood or steel formwork. However, due to the low strength and elastic modulus of EPS, the formliners deform significantly under concrete lateral pressure. Since lateral pressure varies by layer depending on the distance between the central axis and the formliner interface, the entire formwork shape changes, leading to issues where the final structure does not match the design drawings.
This technology defines the reference deformation as the difference between the post-deformation radius and the original radius at any given angle and height (Equation 2). It then defines the compensated shape and the compensated deformation shape using a radius function that incorporates the compensation value, calculating the compensated deformation amount via Equation 3. By evaluating the error between the ratio of reference deformation to reference shape and the ratio of compensated deformation to compensated shape (Equation 4), it determines the final compensation value using Equation 1—based on the premise that the error is near zero—ensuring the compensated shape matches the reference shape after lateral pressure is applied. This can be applied to 3D-printed EPS formliner production, curved concrete structures like bridge piers and towers, and irregular facade precast panels, allowing for precise cutting dimensions that account for lateral pressure at every point on each stacked formliner layer.
This invention was developed with support from the Korea Agency for Infrastructure Technology Advancement (KAIA) for the development of 3D printing equipment and production technology for irregular members.
This technology is a concrete composition featuring a shape memory alloy (SMA) anchoring system. Rod-shaped SMA reinforcement is placed inside the concrete, and both ends are secured outside the concrete surface using an anchoring device consisting of a base plate, a support cylinder, and stoppers. It operates on a wedge principle where the friction against the stoppers increases as the ends of the reinforcement are pulled into the concrete.
Concrete reinforced with SMA has the advantage of a gradual load drop after yielding and the ability to close cracks due to the superelastic effect. However, because SMA cannot be processed with ribs like deformed steel bars, its bond strength with concrete is low. This often leads to slippage as the load increases, and even after the load is removed, the concrete on both sides of the crack remains separated, compromising structural safety.
This technology features multiple stoppers placed inside a support cylinder that narrows toward the bottom, wrapping around the outer surface of the reinforcement. Side protrusions on the stoppers fit into guide grooves on the inner wall of the cylinder, allowing only vertical movement without rotation, while a stopper at the top of the guide groove prevents the stoppers from detaching. The end of the reinforcement has friction grooves, the base plate includes a grouting groove for adhesive and a coupling groove for the support cylinder, and the tightening strength can be adjusted via the gap between two semi-circular cylindrical members. Applicable to bridge columns and beams requiring seismic reinforcement, public facilities needing post-earthquake self-healing, and SMA tension members for prestressing, this system prevents reinforcement slippage, allowing the SMA to return to its original shape after an earthquake and effectively close cracks.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport for the development of carbon-polymer corrosion-zero reinforcement alternatives.
This technology features a variable freezing pipe structure and artificial ground freezing method. It circulates refrigerant through the inner pipe of a double-walled underground freezing pipe to exchange heat with the ground via the outer pipe, while using thermal insulation attachments and members placed at intervals on the outer pipe to direct the growth of the frozen body only in desired directions.
While artificial ground freezing is highly safe for creating frozen walls in soft ground or water-bearing sand layers, it is costly to construct and maintain, and is heavily influenced by surrounding terrain. Existing technologies that use protruding members on the outer pipe to increase refrigerant residence time often lead to over-freezing in areas intended for excavation, reducing efficiency and wasting refrigerant on unnecessary areas.
This technology uses a refrigerant tank and supply pump to feed the inner pipe. It measures the temperature of the refrigerant in the outer pipe; if it falls below a set point, the discharge valve closes to retain the refrigerant, and if it rises, the valve opens to vent it. A freezing measurement unit digitizes the temperature and thickness of the frozen body, allowing a maintenance valve to regulate injection volume. The system uses austenitic stainless steel pipes and liquid nitrogen. It is suitable for urban subway tunnel and shaft excavation, water-bearing soft ground utility tunnels, and emergency excavation, preventing over-freezing to maintain equipment efficiency and reducing liquid nitrogen consumption by selectively venting only spent refrigerant.
This invention was developed with support from the Korea Agency for Infrastructure Technology Advancement (KAIA) for the development of risk management technology during design and construction phases.
This technology is a precast column-to-foundation connection structure where the top of a tension member, passing through a rod installation hole in the precast column, is anchored to the top of the column, while the bottom ball joint is seated in a hemispherical mounting hole within a joint fastening block on the foundation.
Existing methods of securing precast columns that support bridge girders to foundations using steel tension rods suffer from moment reactions at the rod ends when horizontal forces act on the column. This subjects the rods to bending stress and deformation in addition to tension. The bent rods contact the sides of the insertion pipes, reducing the long-term durability of the column base and lowering overturning stability due to reduced fatigue resistance from repeated bending and buckling.
In this technology, the joint mounting hole is cylindrical at the bottom to allow the ball joint to pass through and hemispherical at the top to catch the joint, with a friction-reducing member placed between the curved surfaces. This allows the tension rod to rotate with the column if it tilts, ensuring it remains under pure tension. The support member and joint are threaded onto the tension rod, and the fastening block is secured to the foundation via bolt holes and nut seats arranged radially and symmetrically around the mounting hole. Applicable to precast pier-to-foundation connections, rapid construction of elevated road and railway substructures, and precast column structures in seismic zones, this method shortens construction time through simple bolting and prevents the tension rod from scraping or buckling against the column hole walls, thereby preserving joint fatigue life under repeated seismic loads.
This technology is an integrated formwork fixing wedge pin that combines a pin body, which is inserted into the through-hole of a formwork connector, and an insert member, which is inserted perpendicularly into the pin body to lock it in place, using a pivoting connector. The insert member is typically folded against the pin body and is deployed by unfolding and rotating it into place.
Previously, two separate wedge pins were used—one inserted into the through-hole and the other inserted perpendicularly—which increased worker fatigue and caused construction delays if one pin was lost. There were no standards for fastening, and vibrations often caused pins to fall out of ceiling formwork. Magnetic wedge pins also had limitations, as they could detach under excessive force or vibration.
This technology features a pin body with a formwork support protrusion, a formwork fixing section matched to the through-hole width, a tapered insertion slope, and an elongated fixing hole. The insert member uses a dual-axis hinge with intersecting pivot and rotation axes to allow both folding and 90-degree rotation. The insert member includes a tapered body insertion slope, a support tab for the inner surface of the formwork, a rotation-avoidance slope to prevent snagging when folded, and an anti-play elastic tab to fill gaps in the fixing hole. The rotation pin is secured by a locking protrusion. This system can be used for aluminum and Euro-form wall assembly, high-rise apartment slab ceilings, and pier or column formwork. It simplifies inventory management for workers and ensures rapid, secure fastening that prevents pins from falling out, even in high-vibration ceiling applications.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport's digital-based construction and safety supervision technology development program.
This technology is a floor slab structure and construction method for wall-structured apartment buildings. It involves securing steel beams between RC walls at predetermined locations of maximum deflection and around openings, then embedding these beams between the upper and lower reinforcement bars of the RC slab before pouring concrete.
In apartment buildings, heavy-weight floor impact noise is heavily dependent on the vibration characteristics of the slab itself, even when reinforced with cushioning materials or heavy-weight mortar. Increasing slab thickness leads to issues such as increased wall thickness, higher foundation material requirements, and height restrictions. Existing methods, such as adding frames or drop beams under the slab, are difficult to use in areas with insufficient height, such as recessed ceilings, or where walls are not present on all four sides. These methods also require additional slab drilling and have failed to provide quantitative evidence of noise reduction.
This technology determines the location of maximum deflection based on the length of a pair of masonry walls, the overall width and length of the wall structure, and eigenvalue analysis from numerical models. The steel beams are configured either as a single continuous unit or as a pair extending from both walls and meeting at the center. Additional pairs can be placed before and after the maximum deflection point or near openings, with beam widths determined by natural frequency and vibration scale. Applicable to new wall-structured apartment complexes, units with recessed living room ceilings, and designs meeting stricter floor noise standards, this method increases floor natural frequency by selectively enhancing stiffness without increasing slab thickness.
This invention was developed with support from the Ministry of Science and ICT’s University-Industry Linked Open-Lab Promotion Program for ICT Smart Convergence Components and Materials.
This technology is a safety device for fall victims that houses an airbag module and a folded parachute in the space between a leg harness worn by the worker and an outer wearable band. When a tilt sensor detects a fall posture, the control unit activates an igniter to inflate the airbag and deploy the parachute.
Falls from heights at construction sites often lead to major casualties because workers have no way to save themselves. Existing fall-protection lanyards are frequently left unfastened because they are inconvenient to detach and reattach every time a worker moves, leaving them vulnerable even while switching anchor points.
This technology features a wearable band made of first and second bands connected to rotate; the force of the inflating airbag releases one side, allowing the parachute to emerge, while parachute ropes are connected evenly around the harness. The tilt sensor uses a conductive fluid moving between two chambers separated by a funnel-shaped partition to connect reed electrodes. The igniter uses an explosive charge to drive a tipped plate that punctures a compressed gas canister, sending gas to the airbag. Applicable to high-rise structural and exterior work, bridge and transmission tower maintenance, and plant facility repairs, it slows the fall speed the moment a worker drops, even in areas where safety hooks cannot be used, thereby reducing injury.
