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41 results about "Frost heaving" patented technology
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Frost heaving (or a frost heave) is an upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil (the freezing front or freezing boundary). Ice growth requires a water supply that delivers water to the freezing front via capillary action in certain soils. The weight of overlying soil restrains vertical growth of the ice and can promote the formation of lens-shaped areas of ice within the soil. Yet the force of one or more growing ice lenses is sufficient to lift a layer of soil, as much as 1 foot (0.30 metres) or more. The soil through which water passes to feed the formation of ice lenses must be sufficiently porous to allow capillary action, yet not so porous as to break capillary continuity. Such soil is referred to as "frost susceptible". The growth of ice lenses continually consumes the rising water at the freezing front. Differential frost heaving can crack road surfaces—contributing to springtime pothole formation—and damage building foundations. Frost heaves may occur in mechanically refrigerated cold-storage buildings and ice rinks.
A structure and method for active air-heat synergistic regulation of frost heave prevention in cold-region roadbeds
This invention relates to the field of road and railway engineering technology, and discloses an active air-heat synergistic regulation structure and method for preventing frost heave in cold-region roadbeds. Sensors embedded in the roadbed acquire real-time temperature and humidity data, and a controller automatically switches operating modes based on data feedback and preset logic. In active drying mode, hot, dry air is injected into the pipeline network to reduce the roadbed moisture content below the critical frost heave threshold, eliminating the root cause of frost heave. In adaptive barrier mode, a low-energy "thermal barrier" is formed using slightly warm air, and in the event of sudden water intrusion, a "freezing barrier," or ice curtain, is creatively formed using a low-temperature refrigerant for emergency water isolation. In assisted thaw drainage mode, low-pressure air is used to accelerate the discharge of thawed water. This invention transforms frost heave prevention from reactive remediation and passive defense into proactive, intelligent, full-cycle management, achieving a unified approach to both symptomatic and fundamental treatment. It has advantages such as strong adaptability, high reliability, and integrated functional synergy.
Owner:飞泰交通科技有限公司
Adjustable road widening structure of permafrost roadbed in alpine meadow region
The utility model discloses a kind of high-cold meadow area frozen soil roadbed adjustable road widening structure, including frozen soil layer, the upper end of frozen soil layer is uniformly provided with anti-frozen soil mechanism, anti-frozen soil mechanism is used to prevent highway frost heaving damage, anti-frozen soil mechanism includes the concrete pile that frozen soil layer inside is uniformly provided, the upper end surface of frozen soil layer is paved with foundation compacted layer, the upper end surface of foundation compacted layer is poured with foundation layer, the upper end surface of foundation layer is poured with road, by the positioning pin plug-in steel sheet pile inside, bolt is inserted into foundation layer inside, it is convenient and fast to lay and install prefabricated concrete road, the design of detachable prefabricated concrete road can be conveniently adjusted road width, and it is convenient and fast to dismount and replace, improve maintenance and replacement efficiency, by symmetrically setting solar panel on both sides of foundation layer, clean pollution-free energy can be used to heat pipe heating foundation layer, to prevent frost heaving and thawing damage foundation layer inside.
Owner:THE THIRD ENG CO LTD OF THE HIGHWAY ENG BUREAU OF CCCC +1
An anti-ice expansion self-lifting ecological enclosure system for cold water body and an anti-ice expansion method
The application discloses a kind of northern cold water body anti-ice expansion self-lifting ecological enclosure systems, belong to aquatic ecological restoration technical field, the system includes: enclosure main body;Mechanical lifting cylinder type column, including fixed bottom column and sliding sleeve in its inside lifting column, fixed bottom column lower end is anchored to water bottom, lifting column upper end is fixedly connected with enclosure main body;Floating body assembly, fixedly connected to the top of lifting column;And counterweight, set in the lower part of lifting column, ice cover is frozen as a whole with floating body assembly when icing, the upward jacking force generated by ice layer frost heaving drives lifting column to slide upwards along fixed bottom column, so that enclosure main body is lifted as a whole to above ice layer frost heaving influence area;After ice layer melts, enclosure main body is automatically dropped to the design water level position under the joint action of dead weight and counterweight gravity, and the lifting mechanism is pure physical passive self-adapting structure, without any electrical or mechanical drive, fundamentally solve the technical problem that traditional enclosure is torn and damaged due to ice layer frost heaving in northern cold water body.
Owner:HUANJIAN ECOLOGICAL RESTORATION (BEIJING) CO LTD
High-cold frozen soil area highway drainage ditch anti-frost heaving expansion device
The utility model discloses a high cold frozen soil area highway drainage ditch anti frost heave expansion device, including the drainage ditch body, the upper end surface of drainage ditch body is provided with the protection mechanism, and the protection mechanism is used for preventing the pedestrian and the vehicle to fall into the inside of drainage ditch body, and the protection mechanism includes the expansion screw that installs in the inside of drainage ditch body, and the outside of expansion screw is sleeved with the cushion block, and one end of cushion block is connected with the guardrail, and the inside of guardrail all is provided with the support rod, and the inside of drainage ditch body is provided with the anti frost heave mechanism, can use solar energy to heat the inside of drainage ditch body through burying the heat -collecting pipe and the cooling fin in the inside of drainage ditch body, effectively prevent the frost heave of drainage ditch body and highway, through the expansion pipe insertion inside drainage ditch body, and use screw thread connection expansion pipe, the convenient fixed installation support plate and the water stop tape, and the design of water stop tape can have good ductility and waterproofness, thereby can effectively prevent the water flow infiltration and frost heave caused by the expansion and settlement of drainage ditch body.
Owner:CHINA COMMUNICATIONS CONSTRUCTION
Adaptive frost heaving prevention system for cold and arid region surface covering station
The application relates to a self-adaptive frost heaving prevention system for a surface covering station field in a cold and arid area, belonging to the field of soil mechanics and cold region engineering, which comprises a scattered block stone layer, a stone cage device, a gravel layer, a water isolation layer, a building layer, a surface covering layer, a sand well device, a water pumping device and a control module; the scattered block stone layer, the stone cage device, the gravel layer, the water isolation layer, the building layer and the surface covering layer are sequentially stacked and arranged; the scattered block stone layer and the gravel layer are both provided with drainage holes connected with the sand well device; the water pumping device is arranged at the bottom of the sand well device; the control module is in communication connection with the water pumping device and is used for adjusting the working state of the water pumping device. The frost heaving prevention system can reduce the damage of soil body frost heaving caused by water-gas migration, aggregation and freezing of the surface soil body under the covering station field to the upper building, can guarantee high-performance service of the surface covering station field, can reduce the maintenance cost of the station field damage caused by frost heaving, and can realize water resource recycling and vegetation protection.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
A prefabricated concrete slope protection system based on slope back drainage
The utility model discloses a kind of prefabricated concrete slope protection systems based on slope back drainage, including retaining wall slope protection system and prefabricated module slope protection system;The retaining wall slope protection system is used for slope body vertical face slope protection and drainage;The retaining wall slope protection system includes retaining wall, counter overflow ditch and water collection / cut-off ditch pressure coping stone groove;The prefabricated module slope protection system is used for slope body inclined slope face slope protection and drainage;The prefabricated module slope protection system includes several prefabricated modules, several HDPE sleeve and drainage main pipeline;The utility model has the advantages that: point type anchor cable structure is adopted, and construction process is simplified;Retaining wall slope back drainage structure construction method is adopted, cancels traditional drain hole, adds slope back filter material belt and wall root return overflow ditch, so that slope top rainwater or slope internal stagnant water is darkly drained, frost heaving is prevented;Through darkly drained design, wall surface mildew, long green moss and other problems are avoided, and the landscape quality of slope protection layer exposed surface is improved.
Owner:BEIJING HANGTIANWANYUAN ARCHITECTURE ENG CO LTD
System for evaluating the stable state of a tunnel underpassing a glacier
The application relates to the field of tunnel underpass glacier evaluation, a tunnel underpass glacier stability state evaluation system, a monitoring period of a subzone is set, frost heaving pressure analysis is carried out on each monitoring subzone divided by a tunnel structure, key monitoring subzones and non-key monitoring subzones are screened out, the spatial positioning of each key monitoring subzone and non-key monitoring subzone in the tunnel structure is extracted, adjacent non-key monitoring subzones are screened out, the frost heaving pressure interference of the key monitoring subzone on the adjacent non-key monitoring subzone is analyzed, the probability that the adjacent non-key monitoring subzone evolves into a key monitoring subzone is evaluated, and high-probability evolution non-key monitoring subzones are determined. Limited monitoring resources can be concentrated on the high-probability evolution non-key monitoring subzones, blind dispersion and waste of resources in low-risk areas are avoided, early risk warning signals can be sent, relevant personnel are reminded to pay attention to the frost heaving pressure change conditions of the areas, and construction personnel are timely informed to take corresponding measures.
Owner:NORTHWEST RES INST CO LTD OF C R E C +2
A Dynamic Heating Method and System for Frost Heave Prevention in Cold Region Tunnels Based on Multiphysics Field Coupling
PendingCN122088263ARealize a refined descriptionAvoiding Inaccurate Judgment QuestionsGeometric CADMining devicesMultiphysicsFrost heaving
This invention provides a dynamic heating method and system for preventing frost heave in cold-region tunnels based on multi-physics coupling, relating to the field of frost heave prevention technology for cold-region tunnels. The method includes acquiring temperature gradients, moisture content distributions, and freezing front advance speeds at different depths within the tunnel; performing coupling analysis to identify critical frost heave risk zones; determining heating response sequences; identifying heat transfer path networks; calculating heat utilization efficiency coefficients; and generating dynamic heating source spatial configuration schemes. This invention, through multi-physics coupling analysis and a dynamic response mechanism, accurately locates heating positions and timing, improves energy utilization efficiency, and effectively prevents frost heave damage.
Owner:HEILONGJIANG LONGJIAN ROAD & BRIDGE FIRST ENG CO LTD
Interlocking anti-frost heave device and its roadbed
This invention provides a clamp-type anti-frost heave device and its roadbed, relating to the field of engineering construction technology in seasonally frozen soil areas. The clamp-type anti-frost heave device is applied to the roadbed and includes a heat-collecting pipe, a heat storage unit, and a heat-collecting unit. The heat-collecting unit includes a superconducting heat plate and a heat-absorbing coating. The superconducting heat plate includes a heat-absorbing end and a heat-releasing end, and the heat-absorbing coating is sprayed onto the upper surface of the heat-absorbing end. The rear and front facades of the heat storage unit are used to overlap the heat-releasing end. The heat storage unit is a sealed container, and its interior is filled with a phase change material with a phase change temperature of 10–30°C. The heat-collecting pipe includes interconnected heat-releasing and heat-absorbing sections. The heat-absorbing section overlaps the top of the heat storage unit, and the heat-releasing section is inserted perpendicularly to the embankment from one side. This effectively prevents uneven frost heave and longitudinal cracking in the embankment, especially wide embankments, ensuring the long-term stability of the embankment.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS +1
Anti-frost heaving device for power transmission tower underground structure and control method thereof
ActiveCN120867345BAuxillary controllers with auxillary heating devicesProtective foundationTowerFrost heaving
The present application relates to the technical field of power transmission tower support, in particular to a kind of anti-frost heaving device of power transmission tower underground structure and its control method, the anti-frost heaving device of power transmission tower underground structure includes tower foundation main body, tower foundation main body is inserted in soil when installation, tower foundation main body includes upper part and lower part, upper part is conical tower shape ladder structure, and small end is on, so as to reduce and guide horizontal frost heaving force downward, make tower foundation main body more stable, avoid horizontal frost heaving force and push tower foundation main body to skew or cause tower collapse accident, lower part is inverted pyramid structure, each conical side wall of lower part is provided with split reinforcement, split reinforcement is configured to be able to cut soil along radial direction, so as to be able to reduce upward frost heaving force, prevent frost heaving force and pull tower foundation main body out of ground;Each split reinforcement is provided with anchoring assembly, and anchoring assembly is configured to anchor tower foundation main body in soil.
Owner:国网黑龙江省电力有限公司大庆供电公司
A testing device and testing method for tangential frost heaving force of pile foundation
The application discloses a testing device and a testing method for tangential frost heaving force of a pile foundation. The device comprises an open-ended test box, M frost heaving force testing units and N counterforce units. The inside of the test box is longitudinally divided into M spaces, and the M spaces comprise K total strain spaces and N temperature strain spaces. The M frost heaving force testing units are respectively arranged in the M spaces. Each frost heaving force testing unit comprises a test pile arranged to protrude from a soil layer in a corresponding space. Each frost heaving force testing unit is used to test the strain of the test pile in the corresponding total strain space and temperature strain space. Each counterforce unit is connected with the upper surface of the soil layer in the temperature strain space and the protruding end of the test pile, and is used to prevent the frost heaving deformation of the test pile and the soil layer around the test pile, so that the test pile and the soil layer around the test pile in the temperature strain space remain in place. The frost heaving force testing unit and the counterforce unit are used to separate the temperature strain and the frost heaving strain of the test pile, and the tangential frost heaving force is obtained. The measurement result is accurate and the operation is simple.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED
A settling observation protection sleeve
The application provides a settlement observation protection sleeve, which comprises a sleeve body, an end cover and a heating device; the sleeve body is composed of an outer pipe wall and an inner pipe wall, and a closed annular chamber is formed between the two; the inner pipe wall surrounds to form a first central passage; the end cover is located at one end of the sleeve body, and a second central passage is arranged in the center, and the two are connected to form a central passage for inserting a settlement observation tube; the annular chamber is provided with a heating device for heating the soil and the filler around the sleeve body in a low-temperature environment. The application effectively inhibits the frost heaving phenomenon, prevents the jacking and displacement of the settlement observation tube, and guarantees the accuracy and stability of the observation data; meanwhile, the device has good sealing performance, effectively avoids the infiltration of external moisture, helps to maintain the internal temperature balance, and meets the long-term observation demand in cold regions.
Owner:STATE GRID XINYUAN GRP CO LTD +1
A kind of cold region tunnel anti-frost heaving structure based on frozen soil replacement
The application provides a cold region tunnel anti-frost heaving structure based on frozen soil replacement, which comprises a frozen soil replacement area arranged outside a tunnel lining, a plurality of sand and stone filler bags are stacked in the frozen soil replacement area, and the sand and stone filler bags are connected into an integral whole through solidified cement-based slurry. The sand and stone filler bag comprises a polymer film bag and concrete stones solidified in the polymer film bag. The application completely blocks the interaction between the soil outside the tunnel lining and external moisture and temperature, and eliminates the core condition (water-ice phase change volume expansion) of frost heaving. The application adopts a broken grading filler system to realize active cutting of capillary water paths, directional reconstruction of pore structures and multi-stage dissipation of frost heaving energy through coupling of particle size breaks and function enhancement, so that the frost heaving rate is significantly reduced, and the application has high permeability and frost resistance and durability, and is particularly suitable for lining invert and side wall backfill areas of railway, highway and water conservancy tunnels which are seriously affected by frost heaving soil.
Owner:内蒙古交通集团有限公司 +1
A device and method for testing the allowable normal frost heave displacement of a soil slope protection structure.
This invention relates to an apparatus and method for testing the allowable normal frost heave displacement of a soil slope protection structure. It addresses the limitations in the design, application, and promotion of soil slope protection structures in cold-region water conservancy projects. The protective structure displacement testing device is installed directly above a soil slope subsurface uneven frost heave and thaw settlement deformation simulation device to test the displacement of the soil slope protection structure. The method involves: rotating the second lead screw clockwise; when the innermost ring rises to a set limit, it lifts the second ring until the cumulative lifting height reaches the preset subsurface uneven frost heave deformation, thus simulating frost heave deformation; rotating the second lead screw counterclockwise resets the ring, simulating thaw settlement deformation; and using a three-dimensional topographic surveying system to test the displacement of the protective structure during the uneven frost heave and thaw settlement deformation process. This invention is used for measuring allowable normal frost heave displacement.
Owner:HEILONGJIANG PROVINCIAL HYDRAULIC RES INST +2
Cryogenic rock mechanics response monitoring method, system and device
The application discloses a kind of super-low temperature rock mechanics response monitoring method, system and equipment, and the super-low temperature rock mechanics response monitoring method includes: the rock sample with strain-temperature sensitive grating array and temperature reference grating array being mutually connected in series is placed in super-low temperature environment loading system;Start super-low temperature environment loading system, and the wavelength shift of each grating and the wavelength shift of each grating are measured in real time;The wavelength shift of one of temperature reference grating measured in temperature reference grating array is used to calculate the real temperature of rock sample corresponding grating measuring point;The physical model of strain-temperature sensitive grating center wavelength shift in strain-temperature sensitive grating array is established, and the total strain of rock sample grating measuring point is calculated according to real temperature and the physical model;According to the total strain of rock sample and the natural freeze shrinkage strain of rock sample, the mechanical strain generated by the ice expansion of pore water of rock sample is calculated, and frost heaving stress.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
A method for temporary roadbed hardening for seasonally frozen ground
This invention relates to the field of foundation technology for foundation formation on frozen ground, and discloses a method for hardening temporary roadbeds in seasonally frozen soil. This invention rationally utilizes the characteristic that temporary roads only need to prevent thaw subsidence, not frost heave. Using a mobile grouting device, soluble calcium salts and sodium silicate are injected together into the frozen seasonal soil. The soluble calcium salts not only melt the frozen soil at low temperatures, similar to de-icing salt, allowing the frozen soil to participate in the subsequent solidification process, but also react with sodium silicate to solidify the melted frozen soil into a grout-filled aggregate. This allows for rapid and cost-effective reinforcement of seasonally frozen soil, preventing further thaw subsidence. Furthermore, the use of the mobile grouting device is separate from the freezing and solidification process; steps requiring large construction machinery are performed entirely while the frozen soil is in a solidified state, unaffected by thawing.
Owner:CHINA FIRST HIGHWAY ENGINEERING CO LTD
A corrugated steel plate retaining wall anti-frost heaving structure in an alpine permafrost region
The application belongs to the technical field of slope and gully treatment, and discloses a corrugated steel plate retaining wall anti-frost heaving structure in an alpine permafrost region, which comprises a thick graded sand and gravel soil layer; the corrugated steel plate is a flexible thin-walled structure, and its stress and deformation characteristics can effectively bear the soil pressure and frost heaving force when retaining soil in the permafrost region; the corrugated shape not only enhances the stability of the structure, but also effectively resists lateral soil pressure; when the water in the soil in the permafrost region decreases, the water gradually accumulates on the outer wall of the inclined rod, slides downward through the inclined surface of the inclined rod, and then moves to the outer wall of the outer wrapped water permeable geotextile, so that the water can quickly move to the surface of the outer wrapped water permeable geotextile and penetrate into the thick graded sand and gravel filter layer through the water permeability, thereby avoiding the retention of water in the permafrost layer and helping to reduce the frost heaving phenomenon caused by water freezing.
Owner:CHONGQING JIAOTONG UNIV +1
A frozen soil slope frost heaving force in-situ measuring device
The utility model discloses a kind of frozen soil side slope frost heaving force in situ measuring devices, belong to basic engineering technical field, including the force warning brick and conventional brick of laying in the frozen soil side slope outside, conventional brick is arranged around force warning brick;The force warning brick and conventional brick all include brick body;The brick body includes energy-absorbing component;The energy-absorbing component is arranged by several energy-absorbing cell bodies;Energy-absorbing cell body is side edge concave and hollow negative Poisson's ratio structure;The force warning brick further includes force fiber;Force fiber is arranged at the bottom of force warning brick, contact with frozen soil side slope, for measuring the frost heaving force of frozen soil side slope.The utility model has the advantages of simple installation, stable structure etc.
Owner:NANJING TECH UNIV
Intelligent support control method and system for cold region tunnel excavation
This invention relates to the field of tunnel engineering technology, and in particular to an intelligent support control method and system for tunnel excavation in cold regions. The method obtains dynamic state characteristic quantities by fusing and analyzing data on surrounding rock deformation and temperature distribution features; determines the frost heave pressure accumulation pattern and stress concentration areas based on time-series correlation; couples the characteristics of frozen area expansion with the stress change characteristics of the support structure to generate multi-dimensional support control parameters; and implements differentiated support operations in different zones and makes corrections. This invention can accurately identify changes in surrounding rock stability under freeze-thaw cycles, achieve optimal allocation of support resources, and improve tunnel excavation safety.
Owner:LONGJIAN ROAD & BRIDGE CO LTD
Subgrade anti-frost heaving structure for filling and cutting transition section
The utility model discloses a kind of roadbed anti-frost heaving structures for filling and digging transition section belong to roadbed anti-frost heaving technical field, the roadbed anti-frost heaving structure includes in vertical direction, from top to bottom sequentially arranged pavement structure layer, first medium coarse sand layer, heat insulation layer and second medium coarse sand layer;The heat insulation performance of heat insulation layer can significantly reduce the influence of external low temperature on roadbed soil, reduce the occurrence of soil frost heaving, ensure the flatness and stability of road.The first medium coarse sand layer and the second medium coarse sand layer have good water permeability, improve the drainage performance of roadbed, can promptly discharge moisture in soil, further reduce the risk of frost heaving.Through preventing roadbed frost heaving, reduce the occurrence of pavement disease, thereby prolong the service life of road, reduce maintenance cost, while the construction process of roadbed anti-frost heaving structure is relatively simple, does not need complex equipment and technology, reduces construction difficulty and cost.
Owner:CHINA RAILWAY 23RD BUREAU GRP 4TH ENG CO LTD
Method and system for monitoring frost heave deformation of frozen soil pavement based on three-dimensional image reconstruction
This application discloses a method and system for monitoring frost heave deformation of frozen soil pavements based on three-dimensional image reconstruction. The method includes: registering the reference three-dimensional reconstruction model and each monitoring three-dimensional reconstruction model based on the rigid reference surface; mapping each grid to a multi-temporal three-dimensional reconstruction model sequence based on the grid size and number of grids in each partition; obtaining corresponding pure frost heave deformation time-series data based on the nighttime deformation of the non-exceeding-limit grids in the nighttime monitoring three-dimensional reconstruction model for each monitoring period; obtaining corresponding permanent residual deformation increment time-series data based on the daytime deformation of the non-exceeding-limit grids in the daytime monitoring three-dimensional reconstruction model for each monitoring period; and predicting the deformation trend of the non-exceeding-limit grids based on the pure frost heave deformation time-series data and the permanent residual deformation increment time-series data. This solution can effectively meet the needs for accurate monitoring, quantitative analysis, and real-time early warning of frost heave deformation in the transition section of frozen soil roads and bridges.
Owner:NO 6 ENGINEERING CO LTD OF FHEC OF CCCC +1
A high-cold mountainous slope section cutting type frozen soil roadbed temperature field monitoring system
The utility model discloses a kind of high-cold mountainous area slope section cutting type frozen soil roadbed temperature field monitoring systems, including connected information monitoring unit and information transmission unit, information monitoring unit includes several temperature sensors, temperature sensor is set to roadbed interior;Temperature sensor is connected by data acquisition line, several data acquisition lines are summarized as data acquisition bus, data acquisition bus is connected to information transmission unit;Temperature sensor and information transmission unit are jointly connected to battery;Battery is connected with solar panel by solar power supply line.The utility model is aimed at remote high-cold mountainous area slope section cutting type frozen soil roadbed frost heaving, thawing and sinking disease condition, temperature sensor is set after drilling in roadbed frozen soil layer lower part, to monitor roadbed lower part temperature field situation, to judge frost heaving, deformation disease degree.Can monitor roadbed temperature field change situation, according to human frozen soil upper limit change situation and active layer freeze-thaw cycle degree to carry out disease classification early warning to roadbed.
Owner:新疆那巴高速公路发展有限责任公司 +1
Anti-freezing buried cable with phase change sheath
The present application belongs to the technical field of cable, and discloses an anti-freezing buried cable with phase change sheath, which aims to solve the technical problem that the buried cable in cold regions is easily damaged by soil frost heaving pressure. The cable comprises an anti-freezing cable and a coaxial low-temperature phase change sheath. The sheath is composed of six or more arc-shaped splicing strips. The inner side of the splicing strip is provided with a phase change chamber filled with phase change composite material, and the outer side is provided with an air bag buffer chamber. The end part is provided with a heating belt clamped by a clamping groove. The outer side of the sheath is sequentially covered with thermal insulation cotton and a glass fiber wrapping tape corrosion-resistant layer. The present application discards the steel belt armor and relies on the synergistic effect of phase change protection, air bag buffer and active heating to improve the flexibility of the cable while ensuring the compression resistance, facilitating the laying and installation, effectively resolving the frost heaving pressure, delaying material aging, ensuring the safe operation of the cable and prolonging its service life.
Owner:RUIYANG GRP NORTHEAST CABLE CO LTD
A method for reinforcing soft soil foundation roads in open-pit mines prone to deformation and frost heave
This invention discloses a method for reinforcing soft soil foundation roads in open-pit mines prone to deformation and frost heave. The method employs directional drilling to install drainage pipes, followed by a shallow layer of metal mesh and geotextile on the road surface. This eliminates the need for excavation and damage to the original road structure, significantly reducing interference with open-pit mine transportation operations, shortening the construction period, and enabling simultaneous road reinforcement and transportation. The inclined metal drainage pipes allow for gravity drainage of groundwater, fundamentally addressing the core issue of water-bearing softening in soft soil foundation roads. An electric field drives the reaction of ions with soil particles, forming a high-strength consolidated body, effectively preventing the recurrence of frost heave and ensuring long-term stable reinforcement. The three-layer composite structure of geotextile, metal mesh, and grouting pipes provides both seepage prevention and drainage, while also distributing vehicle loads, reducing road wear, and extending road lifespan. The electrochemical reaction materials do not release toxic or harmful substances, preventing soil and groundwater pollution and meeting the requirements of green mining development.
Owner:CHINA UNIV OF MINING & TECH
A method for predicting bearing behavior of a permafrost foundation in cooperation with multiple pile lengths
PendingCN122113224ASolve the problem of inaccurate load behavior predictionaccurate predictionGeometric CADDesign optimisation/simulationSoil scienceGelisol
The present application belongs to the technical field of frozen ground foundation engineering, and in particular to a frozen ground foundation bearing behavior prediction method with multi-pile length cooperation. A three-dimensional geological-temperature database of the frozen ground foundation is constructed, stratum distribution, water content, fine particle content and geothermal gradient data are integrated, frozen layers and unfrozen layers are divided, and high, medium and low frost heaving sensitive zones are identified. Based on the sensitive zone distribution, a three-level differentiated pile type of "short pile-medium pile-long pile" is designed, a coupling relationship between pile length and frost heaving sensitivity is established, a group pile soil resistance correction model considering pile length difference is constructed by introducing a multi-pile length cooperation effect coefficient, and a frozen layer rigid shell effect correction model and an unfrozen layer bearing decay model are integrated. Through the differentiated pile type design and the cooperation effect model, the problem that the traditional method cannot handle the spatial variability of frozen soil, resulting in inaccurate bearing behavior prediction, is solved, and the present application has the advantages of accurate prediction, optimized design, improved safety and economy.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT
A frost heave and differential settlement control structure suitable for culvert sections in cold regions
ActiveCN224280924UEffectively prevent and treat frost heave diseasesPrevention and treatment of frost heave diseaseGround-workClimate change adaptationFoam concreteRoad engineering
This utility model relates to the field of road engineering technology and discloses a frost heave and differential settlement control structure suitable for culvert sections in cold regions. The structure, from top to bottom, includes a roadbed, a fill matrix, a stepped aggregate layer, a stepped high-strength foamed concrete layer, and a culvert. A main drainage pipe is inclinedly arranged in the aggregate layer, and lateral drainage pipes are provided on both sides of the roadbed slopes to drain moisture from the roadbed. The high-strength foamed concrete layer is laid above and on both sides of the culvert, providing good thermal insulation to address freezing issues exacerbated by wind tunnel effects, and buffering the frost heave force of the surrounding soil to prevent direct frost heave force from causing compression damage to the culvert structure. This structure forms a multi-level stiffness transition from flexible to semi-rigid along the culvert transition section of the roadbed, reducing differential settlement and misalignment risks at the connection between the culvert and the roadbed, improving the overall stability of the roadbed and driving safety. The overall structure is reliable, easy to construct, and suitable for widespread application in cold regions.
Owner:SOUTHWEST PETROLEUM UNIV
A tunnel portal anti-freezing structure in a seasonal frozen soil area
The utility model discloses a kind of seasonal frozen ground area tunnel mouth anti-freezing structures, belong to the field of tunnel disease prevention and cure.To solve the safety problem caused by seasonal frozen ground area tunnel mouth frost heaving and leakage water, the structure includes: drainage component, containing capillary drainage layer and the heat preservation drainage ditch being communicated with it along tunnel datum plane annularly laid, and optional central drain pipe and transverse drainage blind ditch, for draining the moisture of tunnel structure inside and peripheral soil body;Heating assembly, for laying the electric heating layer below the capillary drainage layer;Power supply component, preferably solar power supply device, for the power supply of electric heating layer;And control component, start-stop of the electric heating layer is controlled by temperature sensor and temperature sensing switch.The utility model is combined by intensifying active exclusion to frost heaving source moisture and temperature control adaptive heating, and using solar power supply, can effectively prevent tunnel mouth from producing frost damage in cold season, improve structural durability and driving safety, and have the characteristics of energy saving and environmental protection.
Owner:SOUTHWEST PETROLEUM UNIV
A monitoring and early warning device for frost damage in permafrost tunnels in high-altitude and cold mountainous areas
This utility model relates to a monitoring and early warning device for frost damage in permafrost tunnels in high-altitude and cold mountainous areas, belonging to the field of tunnel monitoring technology. It includes a data analysis system and at least one set of monitoring devices installed circumferentially along the tunnel cross-section. The monitoring devices include multi-point displacement gauges extending into the surrounding rock, soil thermometers and hygrometers, a series of thermometers, concrete strain gauges installed in the secondary lining, and a double-membrane earth pressure cell installed between the primary support layer and the secondary lining. The soil thermometers, hygrometers, concrete strain gauges, and double-membrane earth pressure cell are located on the same axis. The data analysis system is used to collect and analyze data from the multi-point displacement gauges, soil thermometers, hygrometers, thermometers, concrete strain gauges, and double-membrane earth pressure cell and issue early warnings. It can monitor the temperature field, moisture field, and frost heave deformation of tunnels in high-altitude and cold regions in real time, and can achieve multi-parameter coupling in permafrost tunnel monitoring.
Owner:CHANGAN UNIV +3