148results about "Roadways" patented technology

The invention discloses an inverted trapezoidal pile cap and connecting beam combined pile-supported embankment structure and a construction method thereof. The structure sequentially comprises a foundation treatment layer, a rigid pile layer, a pile cap layer, a connecting beam layer, a mattress layer, a reinforcement layer and an embankment filling layer from bottom to top. The rigid pile layer comprises a plurality of cast-in-place piles or precast piles vertically arranged in the foundation. The pile cap layer is arranged at the top of the rigid pile, the pile cap is of an inverted trapezoidal structure with a square section, and the top plane size is larger than the bottom to form a load diffusion slope. The adjacent pile caps are connected through connecting beams with circular sections to form a space overall stress system. Grouting pipelines are reserved in the pile cap and the rigid pile and used for later reinforcement. The load transfer area is enlarged through the inverted trapezoidal pile caps, the horizontal rigidity and the torsion resistance are improved through the circular connecting beams, and the overall stability, the anti-settling performance and the long-term service life of the embankment are remarkably improved by combining the grouting pipelines and the reinforcing ribs.

The application belongs to the technical field of geological compositions, and particularly relates to a fly ash-based high-density geological composition, a preparation method thereof and application thereof in road engineering. The fly ash-based high-density geological composition comprises the following components in mass fractions: fly ash 50-60 parts; slag 20-30 parts; metakaolin 7-12 parts; modified nano Al2O3 2-4 parts; modified polypropylene fiber 1.0-2.0 parts; silica ash 3-8 parts; alkali activator 30-40 parts; and water 15-20 parts. The application provides a fly ash-based geological composition which has normal-temperature bending strength, compressive strength and excellent freeze-thaw resistance.

This utility model discloses a heat-insulating and ventilated composite structure for roadbed in permafrost regions of plateau areas. It includes a permafrost foundation, with ventilation mechanisms installed inside each foundation for road cooling. These mechanisms include ventilation ducts laid on the upper surface of the permafrost foundation, each duct connected to a connecting pipe. Protective netting is installed at the ends of the ventilation ducts. By installing heat-conducting rods and heat-dissipating fins inside the ventilation and connecting pipes, heat from the precast concrete slab and its surroundings can be quickly transferred into the ventilation and connecting pipes. Furthermore, heat dissipation is rapid while the ventilation ducts are ventilating, reducing the impact of roadbed heat on the permafrost foundation. By installing concrete pillars inside the permafrost foundation and laying precast concrete slabs on top of these pillars, the load-bearing capacity is increased, preventing large vehicles from squeezing the roadbed and causing damage to the ventilation ducts.

The present application relates to a logistics plot opening width determination method and system based on connected roads, according to the red line width of the external road connected with the plot, the road cross section and the size of the vehicle entering and leaving the plot, different cases are divided to determine the specific size of the plot opening width, compared with the current selected range value, the value is more scientific, the most suitable plot opening width size can be determined according to different planning requirements, not only can ensure that the large truck can pass smoothly, but also can not occupy too much land area, balance between plot utilization rate and vehicle passing safety.

Provided are a roadbed material containing a particulate carbonated steelmaking slag and a powdery or granular raw material having a carbon fixation capacity and a method for producing the roadbed material without agglomeration of these raw materials. The roadbed material contains at least one of a carbonated steelmaking slag, a wood material, a synthetic resin, and natural fibers in an amount of not less than 1 mass % and not more than 90 mass %.

The application belongs to the technical field of road engineering and foundation treatment, and provides a wind-sand composite roadbed resource intelligent grouting construction method and equipment, which comprises the following steps: after the foundation is leveled, wind-sand is used as the main filler to carry out layered paving and compaction of embankment and lower roadbed; grouting point positions are laid out on the lower roadbed layer; high-performance slurry is used to carry out pressure grouting, and based on the real-time collection results of the compaction degree, the penetration pressure-depth curve, the grouting flow, the lifting speed and the grouting amount per unit depth, the opening and closing of the grouting valve, the grouting pressure and the lifting speed are interlocked controlled or adaptively adjusted to form a continuous and uniform cement column reinforced body; the column top is controlled to be higher than the top surface of the lower roadbed to form a protruding section and is maintained until the preset strength is reached; then, geogrid is laid to make the column top protruding section penetrate and embed in the grid mesh, and the upper roadbed and the pavement structure are continuously constructed; the application takes into account the resource utilization of wind-sand, the collaborative utilization of industrial solid waste and the intelligent control in the construction process.

This invention relates to the field of marine engineering subgrade material preparation technology, and discloses a method for preparing high-performance subgrade materials based on fly ash modification. The method includes: spraying atomized activator onto the surface of fly ash particles, using inorganic acid to etch micro-pits on the surface and depositing mineral salts in situ; mixing activated fly ash with aggregates and an alkaline activator to prepare a subgrade mixture; applying high-frequency vibration pressure during compaction to inject the activating force into the micro-pits; and utilizing the osmotic pressure difference generated by the dissolution of mineral salts to drive the hydration products to grow outward from the micro-pits. This invention, through the concentration gradient generated by the mineral salt enrichment layer, causes the hydration products to form a reverse-growth interwoven structure within the pores, achieving a shift from passive barrier to active sealing defense, thereby improving the material's mechanical anchoring strength and resistance to ion penetration in high-salt marine environments.

The utility model relates to the technical field of civil engineering, and specifically discloses a geocell with internal support structure, which comprises a strip, a rotating rod one and a rotating rod two rotatably connected to the strip through a clamping plate, a plug plate one and a plug plate two rotatably connected to the rotating rod one and the rotating rod two respectively, the plug plate two inserted into the plug plate one through a plug strip, a triangular plate elastically connected to the plug strip, and the triangular plate in contact with the plug plate one, the utility model has the beneficial effects that the plug strip can be inserted into the plug slot by moving the plug plate one and the plug plate two, the plug plate one and the plug plate two are fixed through the triangular plate, the rotating rod one and the rotating rod two are limited and fixed through the limiting strip, the strip is internally supported, the device is convenient to use, can be quickly connected, and can effectively support.

The application relates to the field of bridge-head filling embankment, and particularly discloses a foamed light soil bridge-head high filling embankment and a construction process thereof. The foamed light soil bridge-head high filling embankment comprises an isolation layer and a foamed light soil layer, and a protective wall is arranged in the foamed light soil layer. The foamed light soil layer is formed by pouring foamed light soil, and the foamed light soil comprises the following raw materials in parts by weight: 100 parts of Portland cement, 60-64 parts of water, 4-6.8 parts of foam, 21-35 parts of a modifier, and the preparation raw materials of the modifier comprise a cationic polymer and improved soil, and the weight ratio of the cationic polymer to the improved soil is 1: (6-20). The construction process is as follows: S1, excavating a roadbed and a slope; S2, laying the isolation layer; S3, pouring a stratum protective wall; S4, pouring the foamed light soil; S5, maintenance; and S6, repeating S3-S5. The application has the effects of improving the pouring uniformity of the foamed light soil and reducing the probability of uneven settlement of the embankment.

The present application relates to the technical field of railway subgrade in salinized frozen soil area, and particularly relates to a ship raft type separation layer subgrade structure and a construction method. The structure comprises a ship type separation layer raft foundation arranged on a natural foundation and a subgrade filling body arranged above the ship type separation layer raft foundation. The ship type separation layer raft foundation comprises an outer shell, a geocell arranged in the inner cavity of the outer shell, a foamed polypropylene cement-soil-stone mixture filled in the geocell, and a cooling pipeline network arranged at the bottom of the inner cavity of the outer shell. The ship type separation layer raft foundation is a water-impermeable integral raft structure. The present application effectively prevents foundation thawing settlement and consolidation deformation by the light weight, water isolation, heat preservation and stress dispersion characteristics of the ship type raft foundation, simultaneously isolates water and salt migration, significantly reduces subgrade salt expansion, and meets the requirements of smoothness and durability of grade I railway.

The application discloses a kind of urban garden road systems, belong to urban planning technical field;Including: central agglomeration green land, and two one-way motor lanes respectively arranged in the outer side of the two side edges of the central agglomeration green land, the driving direction of the two one-way motor lanes is opposite;The two one-way motor lanes are non-parallel curved trend along its extension direction;The lateral width of the central agglomeration green land, with the curved trend of the two one-way motor lanes on its two sides, is alternately zoomed wide and narrow change.By the action of merging two side green belts to center, the broken state of original green belt being physically cut by wide lane is changed;The central green land after concentration can form larger area, more continuous ecological patch, and scale is used more diverse urban public activity organization, enhances the sense of belonging of citizen to the region, improves urban vitality.

This invention belongs to the field of silt solidification technology, specifically relating to a freeze-thaw resistant solidified silt, its preparation method, and its application. The freeze-thaw resistant solidified silt is made from the following raw materials in parts by weight: 84.4 to 90.8 parts silt, 0.2 to 0.6 parts fiber material, and 9 to 15 parts industrial solid waste. The total amount of silt, fiber material, and industrial solid waste is 100 parts. The silt has a plasticity index of 10 to 27 and a particle size of less than 2 mm. The fiber material is selected from any one of basalt fiber, alkali-resistant glass fiber, polypropylene fiber, and polyester fiber. The industrial solid waste is selected from any one of fly ash, blast furnace slag powder, and coal gangue powder. With increasing freeze-thaw cycles, the deviatoric stress of the solidified silt gradually weakens, and the decrease in peak deviatoric stress tends to level off, becoming gradual after 7 freeze-thaw cycles.

The application discloses a foundation leveling device for highway construction and belongs to the technical field of foundation construction, which comprises a leveling mechanism for leveling a highway foundation, a crushing mechanism arranged on the leveling mechanism and used for crushing the highway foundation, and a rolling mechanism used for rolling the highway foundation; the crushing mechanism, the leveling mechanism and the rolling mechanism are integrated, so that the crushing, preliminary leveling and compaction of the highway foundation can be completed at one time, the complicated process of replacing the equipment multiple times in traditional construction is avoided, and the construction efficiency is remarkably improved; the lifting crushing block and the inserting block are matched with the spring rebound impact structure, so that the hard soil or loose sandstone layer can be effectively crushed; meanwhile, the height of the rolling mechanism can be adjusted, different compaction requirements can be met, and the device can stably work in soft soil, hard soil or mixed foundation.

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.

This invention discloses a modified phosphogypsum and its application in roadbed materials, relating to the field of building materials technology. The invention includes preparing a composite modifier comprising an alkaline activating component, a sulfate activating component, a crystal form regulating and gradation optimizing component, and an impurity curing component. The pretreated phosphogypsum fines are mixed with the prepared composite modifier at a mass ratio of 85-92:8-15, followed by a primary dry mixing and a secondary wet mixing process. During wet mixing, water is sprayed in to adjust the moisture content, followed by a curing process to obtain a mixture. The resulting mixture is then spread and compacted to form a roadbed filling layer. This invention, through the synergistic effect of the alkaline activating component, sulfate activating component, crystal form regulating and gradation optimizing component, and impurity curing component in the composite modifier, combined with the curing process, allows the modifier to fully react and cure with harmful impurities in the phosphogypsum, effectively improving the bonding density, water stability, and environmental safety of phosphogypsum-based materials.

The present application relates to a kind of flow material stable large particle size gradation coal gangue composite roadbed structure and construction method, belong to solid waste utilization and environmental protection technical field, with large particle size coal gangue as main skeleton material, the main skeleton material inside pre-embedded has composite vertical pipe pouring system, for filling flow material in main skeleton;Roadbed structure layered construction, set up half-buried coal gangue interlocking interface between upper and lower layer;Flexible grid made of waste tire strip is laid at transverse construction joint, realize the synergistic enhancement of vertical and horizontal.The present application is through to the optimization of super large particle size coal gangue gradation, introduce the cohesive material with fluidity to fill the clearance between coal gangue skeleton, enhance the cohesion and integrity of coal gangue skeleton, and add geogrid made of waste tire between horizontal layer, play the role of enhancing interlayer link, realize coal gangue efficient utilization and coal gangue roadbed stability promotion.

The application relates to the technical field of road construction, and discloses a construction system of a carbonized alkali-activated base light soil embankment, which comprises an embankment body, a vacuum pump, a carbon dioxide gas tank and a high-pressure micro-mist humidifier. The embankment body comprises a first pouring layer and a second pouring layer, the first pouring layer is provided with a humidity sensor and a pipe group structure, the top of the pipe group structure is provided with a first communication end, the bottom of the pipe group structure is provided with a second communication end, the second pouring layer is arranged on the first pouring layer, and the second pouring layer is provided with a temperature sensor. The vacuum pump and the carbon dioxide gas tank are in communication with the first communication end. The high-pressure micro-mist humidifier is in communication with the second communication end. The application solves the problem of deterioration of alkali-activated materials under dry-wet / frozen-thaw cycles.

The invention provides oil-based drilling cutting-based fluid-state solidified soil as well as a preparation method and application thereof, and belongs to the technical field of fluid-state solidified soil. The oil-based drilling cutting based flow state solidified soil is prepared from the following raw materials: 100 parts of pretreated oil-based drilling cutting, 10 to 15 parts of a composite curing agent, 1 to 3 parts of polymer latex, 2 to 4 parts of rubber particles, 0.2 to 0.4 part of basalt fiber, 0.5 to 1 part of magnesium oxide, 0.2 to 0.5 part of a flocculating agent, 0.4 to 0.6 part of a water reducing agent and 60 to 80 parts of water, the pretreatment method of the oil-based drilling cuttings comprises the following steps that the oil-based drilling cuttings are subjected to heat treatment after being subjected to preliminary dehydration; then, uniformly mixing the oil-based drilling cuttings subjected to heat treatment with quick lime and an ionic salt solution, and carrying out braising treatment; and then adding activated carbon and wood chips, and stirring at normal temperature for reaction to obtain the pretreated oil-based drilling cuttings. The oil-based drilling-cutting-based fluid-state solidified soil has good fluidity and excellent compressive strength and crack resistance, the problems that oil-based drilling cuttings occupy land and pollute the environment after being piled up for a long time are solved, and resource utilization of waste materials is achieved.

This invention belongs to the field of energy storage technology and provides a prefabricated road surface energy storage system, including several battery modules, a thermal management system, and an electrical connection system. The battery modules are disposed at the lower end of the road base layer and include two battery layers and a liquid-cooled plate layer located in the middle of the battery layers. The liquid-cooled plate layer includes a liquid-cooled plate with cooling liquid channels inside. The thermal management system includes thermally conductive adhesive connecting layers between the upper battery layer and the upper surface of the liquid-cooled plate, and between the lower battery layer and the lower surface of the liquid-cooled plate. The electrical connection system includes intra-layer busbars, inter-layer busbars, and outgoing busbars, connecting the individual battery cells of the two battery layers in series into a continuous link. Each end face of the entire battery module is equipped with an end plate, and the upper end plate is provided with an elastic element. An energy storage shell is provided on the outside of the end plate. This invention improves the feasibility and promotional value of prefabricated road surface energy storage systems in practical engineering.

This utility model discloses a reinforcement structure for strengthening railway subgrade, including a subgrade body and railway tracks laid on top of the subgrade body. A reinforcement layer is provided at the bottom of the subgrade body, and slope protection structures are provided on both sides of the subgrade body. A buffer layer is provided at the top of the subgrade body and below the railway tracks. A first impermeable layer is provided between the reinforcement layer and the subgrade body; a second impermeable layer is provided between the slope protection structures and the slopes of the subgrade body. This utility model relates to the field of railway engineering technology, and particularly to a reinforcement structure for strengthening railway subgrade. This utility model enhances the subgrade's load-bearing capacity and resistance to settlement through a reinforcement layer, prevents water intrusion through double impermeable layers, damps vibration through a buffer layer, and integrates structural and ecological protection through a grid beam + vegetation slope protection. The synergistic effect of multiple structures effectively solves problems such as subgrade settlement, slope instability, water seepage, and insufficient vibration damping, improving stability, durability, and ecological friendliness.

The present application relates to the technical field of geosynthetic material, and more particularly to a geocell node connecting structure and method thereof, which comprises a belt body and two buckles in buckling connection, the buckle is provided with a boss and a groove, the groove is sequentially provided with a melting cavity and a negative pressure cavity from top to bottom, a pre-sealed fusible resistance flow film is arranged between the two cavities, and the bottom of the melting cavity extends laterally to have an expansion cavity. In the ultrasonic welding state, the end of the boss is heated and melted and instantaneously burns through the fusible resistance flow film, so that the negative pressure cavity in the sealed state is instantaneously penetrated. By using the generated negative pressure suction effect, the repulsive force generated by the thermal expansion of the plastic is actively offset, and the two buckles are continuously and closely driven to adhere. At the same time, the negative pressure force guides the high-viscosity molten material to flow laterally into the dead angle of the expansion cavity, and after cooling, a seamless T-shaped physical locking structure is formed. The present application completely solves the problems of traditional ultrasonic welding, such as rebounding and debonding, and filling of the reverse buckle, and greatly improves the tensile and peeling strength of the node.

This invention provides a method and apparatus for treating defective fillers that have undergone microbial-induced solidification. The method includes: obtaining heavy metal immobilization bacteria; preparing a composite bacterial solution, a composite cementing solution, and a chelating activation solution; pretreating the defective filler; and simultaneously treating the surface and deep layers of the defective filler. After drilling a hollow spiral grouting pipe to the target depth, a dual-channel grouting structure is connected. The dual-channel grouting structure is connected to a surface spraying plate. The chelating activation solution, composite bacterial solution, and composite cementing solution are sequentially injected into the dual-channel grouting structure, allowing the injected liquid to be simultaneously sprayed from the surface spraying plate onto the surface of the defective filler and injected into the deep layer of the defective filler from the hollow spiral grouting pipe, achieving simultaneous treatment of the surface and deep layers. This invention can induce the generation of a microbial-solidified composite barrier layer through functional bacterial agents, achieving long-term heavy metal immobilization and simultaneous improvement of mechanical properties.

This invention relates to a fly ash-based low-carbon cementitious material for use in semi-rigid base courses of highways. The cementitious material is composed of the following components in parts by weight: 50-70 parts fly ash, 15-30 parts granulated blast furnace slag powder, 5-12 parts calcium carbide slag, 3-8 parts desulfurized gypsum, 1-5 parts sodium sulfate, 0.1-0.5 parts retarder, and 0.5-1.5 parts readily soluble sodium silicate. The preparation method includes: drying calcium carbide slag and desulfurized gypsum, then mixing and ball-milling them with fly ash, granulated blast furnace slag powder, sodium sulfate, retarder, and readily soluble sodium silicate to obtain the fly ash-based low-carbon cementitious material. The construction method includes: mixing aggregates with the cementitious material, spreading and compacting the mixture, and performing segmented curing. This invention solves the problems of difficulty in balancing early strength and crack resistance, and uncontrollable setting time in existing fly ash-based materials. It can replace cement, significantly reduce carbon emissions, and is suitable for the construction of semi-rigid base courses for high-grade highways and municipal roads.

This invention discloses a method for constructing a composite structure of a crushed stone softened base course pavement based on finite element modeling. The method includes: dividing the waste semi-rigid base course pavement structure into a loose layer and a crushed stone softened layer, and determining the shear strength components of each layer; the crushed stone softened layer includes a crushed stone layer and a cracked layer; comparing and analyzing the main mechanical control indicators of each pavement structure based on finite element modeling to determine the optimal location of the crushed stone layer; conducting orthogonal experiments on inverted and composite base course pavement composite structures to calculate the influence of various factors on the pavement composite structure and identify key factors; setting the parameter variation range of the pavement structure based on the key factors, calculating various mechanical control indicators under different parameter combinations, and determining the optimal thickness and optimal modulus of the loose layer and cracked layer. This invention can complete the optimized construction of a crushed stone base course pavement composite structure, providing guidance for the entire process of quantifying the characteristics of the crushed stone softened layer and accurately designing the parameters of the overlay structure.

A planning scheme for a cross-channel cylindrical vehicle passage (2) in a deep water channel, which is able to alleviate the influence of strong earthquakes on the underwater passage, is provided. The structure is a reinforced concrete cylindrical vehicle passage (2) that is able to resist the surrounding deep water pressure, is suspended from the water surface to a depth of, for example, about 15 meters underwater, is pulled by a soft metal chain (3) from a fixed point on the seabed to hold the cylindrical vehicle passage (2) that has a tendency to float, and uses the surrounding large ocean water body to greatly resist or alleviate the shock intensity of a 5 or above earthquake that frequently occurs in the geographical environment of the area, and enables it to exist underwater for a long time. It is especially suitable for building in the relevant parts of the channel area between the Chinese mainland and Hainan Island, which is extremely deep and has frequent strong earthquakes (the deepest area is about 114 meters). In this example, which has not yet been implemented as the first line, the total investment amount of the planning scheme is not necessarily very high, and is likely to be much smaller than the existing technical scheme.

The application discloses a yellow flood area soil solidifying agent and a use method thereof, and the yellow flood area soil solidifying agent comprises the following raw materials in parts by weight: 40-70 parts of blast furnace slag, 5-20 parts of fly ash, 10-20 parts of lime, 10-20 parts of ordinary Portland cement, 10-20 parts of dust removal ash, 0.5-2 parts of fatty alcohol polyoxyethylene ether and 0.5-2 parts of nano silicon dioxide. The soil solidifying agent is low in price, has a remarkable reinforcing effect on the yellow flood area soil body, can effectively solve the problem of reduction and utilization of a large amount of solid waste, can reduce the cost of solidifying the yellow flood area silt, and has remarkable economic benefits and environmental protection benefits.