1498results about "Roadways" patented technology

The invention belongs to the technical field of roadbed engineering, and particularly relates to a construction uniformity evaluation method for a clay improved copper tailing roadbed. The method comprises the following specific steps: S1, determining the proportion of the clay improved copper tailing roadbed filler; s2, applying the blended clay improved copper tailings to roadbed construction; and S3, carrying out construction detection on the clay-improved copper tailing roadbed, calculating a mixing uniformity coefficient, and comparing the mixing uniformity coefficient with a uniformity coefficient in a laboratory to evaluate the construction uniformity of the clay-improved copper tailing roadbed. According to the method, after roadbed construction is completed, a working project of measuring the compactness through a field sand filling method is combined, the mixing uniformity coefficient is calculated with the deviation between the composition proportion of roadbed filler sampled through the sand filling method and a proportion design result as a parameter, and the construction quality can be effectively evaluated conveniently.

The invention discloses a cementing material for a solid waste-based road of a coal-fired power plant and a preparation method of the cementing material. The cementing material mainly comprises a cementing component, an alkali-activated component and a reinforcing component, the gelling component is a mixture of coal-fired power plant fly ash and furnace slag; the alkali-activated component is a mixture of alkali residues, red mud, blast furnace slag and coal-fired power plant desulfurized gypsum; the reinforcing component is rice hull ash or peanut hull ash. The mass ratio of the gelling component to the alkali-activated component is (4 / 1)-(10 / 1); and the addition amount of the reinforcing component is 1-3% of that of the main body material. The coal-fired power plant solid waste fly ash, the furnace slag and the desulfurized gypsum are used as main bodies, a small amount of other industrial solid waste is added, and the cementing material belongs to a full-solid-waste low-carbon cementing material and can be applied to a road base, a subbase or a base layer. The invention has the characteristics of low carbon emission, high solid waste consumption, simple production process and strong pavement performance, and in addition, the invention has a good stabilization effect on the problem that part of solid waste heavy metals and sulfate ions in a coal-fired power plant exceed the standard.

The invention provides a wind and light power station area road planning method and system based on terrain analysis. According to the method, digital elevation model data and vehicle turning radius parameters of a wind and light power station area are processed, layered reconstruction and optimization are carried out, optimized sampling data are generated, and a road network is constructed by using the optimized sampling data; path optimization is further carried out based on the road network data to obtain a path candidate set, and final road path data suitable for the wind and light power station area is generated through an electric field layout and equipment adaptation algorithm, construction adaptability processing and a safe and smooth correction means, so that the road planning precision is improved, the construction adaptability is enhanced, and the construction efficiency is improved. The actual requirements under different topographic conditions are met, the problem that local environment characteristics and operation safety requirements cannot be reasonably integrated in traditional path planning is avoided, and the feasibility of wind and light power station road planning is effectively improved.

The invention relates to the field of new-generation information technology and civil engineering, in particular to a frost heaving prevention technology of a roadbed in a seasonal frozen area, and particularly relates to a solar heating frost heaving prevention drainage roadbed in the seasonal frozen area and a construction method of the solar heating frost heaving prevention drainage roadbed. The method comprises the steps that environment sunlight data are obtained based on a solar heat collection device, heat energy is stored through an efficient heat storage material, and a heat energy output sequence is generated; acquiring soil temperature, humidity and frost heaving stress data from an environment sensor, predicting a frost heaving trend in combination with historical frost heaving characteristics, and generating regulation and control parameters; the heat energy output sequence and the frost heaving regulation and control parameters are input into a dynamic temperature control and drainage linkage module, heat distribution and optimization adjustment of a drainage path are carried out, and a linkage control strategy is generated; and performing feedback analysis on the operation condition of each module based on the data, and optimizing the control parameters of the dynamic temperature control and drainage linkage module. The temperature and humidity of the roadbed can be accurately adjusted, the frost heaving phenomenon is prevented, and roadbed drainage is optimized.

The invention provides a permafrost roadbed disease early warning method, and relates to the technical field of permafrost roadbed disease evaluation. The method comprises the following steps: performing deformation laser scanning detection on the surface of the permafrost roadbed to obtain road surface deformation point cloud elevation data of the permafrost roadbed; and preprocessing the road surface deformation point cloud elevation data to obtain a surface elevation two-dimensional grid of the permafrost roadbed. And calculating a deformation gradient value of each grid unit in the elevation two-dimensional grid by adopting an eight-neighborhood gradient algorithm to obtain a surface deformation gradient two-dimensional grid of the permafrost roadbed. And classifying the surface deformation gradient two-dimensional grids based on a preset deformation gradient threshold value, identifying a standard-exceeding area of the permafrost roadbed, and determining a roadbed disease index based on the area of the standard-exceeding area. And determining the disease early warning level of the permafrost roadbed according to the roadbed disease index. According to the method, the development process of frozen soil roadbed diseases can be effectively predicted, and the timeliness and reliability of freeze-thaw disaster early warning are remarkably improved.

The invention discloses a frozen earth region highway subgrade thaw collapse measurement method and system, and relates to the technical field of data measurement management, and the method comprises the steps: obtaining a to-be-measured subgrade region, obtaining a plurality of measurement directions, forming a node sequence of each measurement direction, and obtaining a blank measurement region; acquiring a first moment and a second moment, acquiring a first roadbed height sequence at the first moment, acquiring a second roadbed height sequence at the second moment, and acquiring a current roadbed height sequence; obtaining a current trend value, obtaining a first historical trend value, obtaining a second historical trend value, obtaining a first difference value, and obtaining a second difference value; and if the first difference value and the second difference value are both smaller than a preset threshold value, obtaining a measurement result of each blank measurement area according to the current roadbed height sequence of each node sequence. The method has the advantages of accurate prediction, high-precision measurement and adaptive measurement.

The invention belongs to the technical field of comprehensive utilization of industrial solid wastes, and particularly relates to a sawing mud-graphite tailing road base material as well as a preparation method and application thereof. The road base material is prepared by mixing saw mud, graphite tailings, a red mud-based cementing material, a reinforcing agent and water. The sawn mud-graphite tailing road base material is applied to a heavy traffic load road base with the strength requirement of 4.0-6.0 MPa. According to the sawing mud-graphite tailing road base material, all aggregates in a traditional road base material are jointly replaced by sawing mud-graphite tailings, and the red mud-based cementing material is adopted for curing, so that the utilization efficiency of solid waste recycling is greatly improved; and the problems of shortage of sand and gravel resources and high material cost of construction engineering in the road engineering construction process are relieved.

The invention belongs to the technical field of road engineering detection, and discloses a geological radar and distributed optical fiber roadbed compaction detection method and device, and the method comprises the steps: obtaining a dielectric constant profile detected by a radar and the initial Brillouin scattering light frequency offset of optical fiber strain; establishing an initial reference state including optical fiber strain distribution and a radar dielectric constant profile; comparing the Brillouin scattering light frequency offset and the radar dielectric constant profile image which are acquired in real time with an initial reference state, determining a strain gradient abrupt change region, and correcting a preset optical fiber temperature drift compensation model by using a radar scanning result; and performing temperature drift component removal on the Brillouin scattering light frequency offset obtained in real time to obtain pure strain frequency shift data, calculating according to the frequency shift data to obtain accumulative settlement, and generating a roadbed compaction effect detection result. Continuous longitudinal strain monitoring is provided through the geological radar and the sensing optical fiber, and an abnormal section is accurately positioned.

The invention provides a roadbed and pavement safety assessment and graded monitoring method, system, equipment and medium, and relates to the technical field of highway safety. A unified safety risk grade system is established based on multi-source data integration; in a highway design stage, carrying out initial safety risk grade division on the whole-line roadbed and pavement based on the unified safety risk grade system; a hierarchical monitoring strategy is specifically designed for each initial security risk level; in the highway operation period, monitoring data of each monitoring strategy are continuously collected, and when the monitoring data reach the level adjustment condition, the safety risk level of the corresponding road section is dynamically adjusted; according to the method, safety monitoring is started in the highway design stage, unified standard or logic association is provided for safety assessment of the roadbed and the pavement, and targeted monitoring is performed according to the safety risk level by adopting a hierarchical monitoring strategy, so that the resource utilization efficiency is improved, and the safety of the roadbed and the pavement is ensured. And the operation and maintenance cost is reduced.

The invention belongs to the field of road engineering, and particularly relates to a magnetic field-microorganism reinforcing method for a steel slag gravel road base, a reinforcing strength model and a construction method of the reinforcing strength model. The reinforcement method comprises the following steps: firstly, soaking the steel slag broken stones by using a solution containing bacillus alcalophilus, then paving the steel slag broken stones on a roadbed, and applying a constant magnetic field; the reinforcement strength model comprises a prediction model of a vertical rebound modulus E1 and a prediction model of anisotropy coefficients gamma 1 and gamma 2; the construction method of the reinforcement strength model comprises the following steps: according to a variable confining pressure dynamic triaxial test result, then analyzing the result, obtaining fitting results of fitting parameters k1 and k2 and anisotropy coefficients gamma 1 and gamma 2 under different bacterial liquid concentrations and magnetic field intensities, and constructing a prediction model. The invention provides a novel treatment method for free calcium oxide and free magnesium oxide in steel slag macadam. The reinforcement strength model provides a tool which is high in cost benefit, simple and convenient to operate and accurate in prediction, so that the design and application of the steel slag gravel as a road base material are supported.

The invention belongs to the technical field of settlement observation, and particularly relates to an expressway roadbed settlement observation device which comprises a bottom plate, a top plate and vertical plates arranged at the two ends of the top plate, the bottom plate is arranged on a foundation, the bottoms of the vertical plates are fixedly installed on the bottom plate, the vertical plates and the bottom plate are arranged in a roadbed, side plates are arranged on the two sides of the vertical plates, and the side plates are arranged on the top plate. Observation mechanisms are arranged on the two sides of the center line of the top plate, a leveling mechanism is further arranged on the bottom plate, and the leveling mechanism is matched with the second rack. According to the subgrade settlement observation device, settlement observation can be carried out on different positions of a subgrade, when the subgrade where the first rack is located settles, the first rack moves downwards to drive the gear to rotate, the gear rotates to drive the second rack to move outwards, and when the subgrade where the connecting piece is located settles, the connecting piece settles to drive the second rack to rotate around the rotating shaft; and when the subgrade at different positions settles, the state of the second rack is different, so that the subgrade settlement observation accuracy is improved.

The invention provides a composite pile foundation structure for road surface rigidity optimization of a road transition section and a design and use method of the composite pile foundation structure, and relates to the technical field of composite pile foundations. The composite pile foundation structure can be applied to an embankment foundation and a bridge abutment pile foundation and comprises a bearing platform, a pile cap, a gasket, an elastic composite plate, replaceable filler, a pile and a pile end self-adaptive deformer. The design and use method of the bridge abutment pile foundation is guided by the load settlement characteristic of the butted roadbed, and the design and use method of the embankment composite pile foundation is guided by the settlement control standard. Design variables comprise the pile length, the pile diameter, the pile number, the compression thickness of the elastic composite plate, the arrangement depth of the replaceable filler, the limit pile side friction resistance of the replaceable filler and the compression modulus of the replaceable material, the structure can optimize the overall rigidity of the road surface on one side of the abutment, the phenomenon of bump of the abutment is effectively avoided, zero-differential settlement is achieved theoretically, and the construction efficiency is improved. And the settlement index can be controlled in the application of an embankment foundation.

The invention relates to a deep and thick high-temperature permafrost region highway foundation bearing capacity enhancing method which comprises the following steps: detecting the bearing capacity of a permafrost foundation through static sounding to obtain the spatial distribution characteristics of the bearing capacity of an original-state foundation; the spatial distribution characteristics of the bearing capacity of the undisturbed foundation at least comprise a bearing capacity mean value, a bearing capacity range and a bearing capacity decline ratio; establishing a mapping model at least based on the spatial distribution characteristics of the original-state foundation bearing capacity and the shallow foundation enhancement mode; based on the mapping model, according to the spatial distribution characteristics, obtained through detection, of the original-state foundation bearing capacity, the shallow foundation strengthening mode is determined, and the shallow foundation strengthening mode comprises a structural strengthening measure, a material strengthening measure and a hydrological regulation and control strengthening measure and is used for improving the overall bearing performance of the foundation and restraining permafrost degradation; the structural reinforcing measure at least comprises the steps that a composite bearing structure system is constructed in a shallow foundation, and the mechanical property of the whole foundation is improved by enhancing the bearing capacity of a local area of the foundation.

The invention discloses a gabion gabion net cage system for reinforcing a high-fill embankment of an expressway, belongs to the technical field of gabion gabion net cages, and solves the problems that in the prior art, external loads are resisted only through self-strength, and the gabion gabion net cage system and a filling body are difficult to form a synergistic deformation whole, so that the structure is cracked and fails. The system comprises an excavation roadbed, at least one group of filling slope foundations, gabion gabion gabion net cages and backfill discrete materials, according to the gabion gabion gabion grid net cage, through the synergistic effect of tensile resistance of the steel wire mesh and shear resistance of the block stones, the gabion gabion gabion grid net cage and the filling discrete material form a flexible-rigid composite structure, so that the high tensile property of the steel wire mesh can effectively restrain horizontal displacement and deep slippage of the filling material, and deformation of a side slope along a potential slippage face is restrained; and the gradation matching performance of the block stone filling structure and the backfill discrete materials enhances the occlusion effect between the materials, and the shear strength and the overall rigidity of the slope are remarkably improved.

A valve assembly is provided, wherein the valve assembly includes: a valve member; a base including a base portion, at least two columns and at least two through holes, the base portion including a first side and a second side opposite to each other, the first side being configured to be abutted on a mounting surface, the at least two columns being protrusive from the second side and configured to support the valve member, the at least two through holes being disposed through the first side and the second side respectively and configured for installation of at least two positioning members which are configured to be disposed through the at least two through holes and secured to the mounting surface; and at least two fasteners being disposed through the valve member and connected to the at least two columns respectively.

A composite capsule-based control apparatus and method for actively controlling soil deformation, comprising deformation bodies (2), a porous pipeline, a sealing cover and a medium injection control system. The deformation bodies (2) are connected by means of a sawtooth interface (3), and connecting portions are provided with pores. A deformation body (2) has two states: for use in laying new embankments, both sides are folded inward along an edge to ultimately form a rectangular flat shape, and multiple deformation bodies (2) are arranged in sequence along the longitudinal direction of an embankment; for operational repair implantation, bundled deformation bodies (2) that are initially cylindrical are implanted into reserved holes. The sealing cover is used to seal reserved holes on the embankment after the deformation bodies (2) are laid on a new embankment, to ensure that the outer appearance is the same as the embankment slope. The medium injection control system is used to monitor and control the injection of a medium. The porous pipeline has a single inlet and multiple outlets, the inlet of the porous pipeline being connected to a medium injection pipe (1), and the porous pipeline being uniformly disposed within the deformation bodies (2), to achieve uniform medium injection and ensure that lifting force remains stable during a control process.

The invention discloses a subgrade concealment disease quantitative identification method based on a ground penetrating radar, relates to the technical field of image processing, and aims to respectively establish ground penetrating radar forward simulation models for highway subgrade cavity, crack, looseness and void diseases, simulate the propagation process of radar emission electromagnetic waves in a medium, and identify the subgrade concealment disease. A B-scan radar image with clear disease types and sizes is obtained, a data set is obtained by expanding a simulation radar image, a high-quality standard data set of highway roadbed diseases is created, and quantitative recognition of the roadbed diseases is facilitated; according to the method, highway subgrade disease characteristics of different forms, different development degrees and different fillers are analyzed, the disease characteristics at least comprise cavity diseases, crack diseases, loosening diseases and void diseases, the relation between the preset disease size and the width and area in a GPR image is analyzed, and quantitative analysis of subgrade diseases is achieved. And intelligent recognition of highway subgrade diseases is realized by using a deep learning algorithm.

The present invention relates to the technical field of comprehensive utilization of industrial solid waste, specifically a graphite tailings-saw mud road subbase material and its preparation method and application, including the following components in parts by weight: 40-55 parts of graphite tailings, 45-60 parts of saw mud, 0.5-2 parts of phase change microcapsules, 5-10 parts of slaked lime, 10-20 parts of fly ash, 0.5-1.5 parts of titanium gypsum, 0.5-2 parts of steel slag powder, 5-15 parts of water and 0.05-0.2 parts of dispersant; the 7d unconfined compressive strength range of the graphite tailings-saw mud road subbase material is 2.64-3.87MPa, and the compressive strength loss rate (BDR) range is 82.1%-86.2%. By using titanium gypsum and steel slag powder, a gelling material with micro-expansion properties, to solidify the graphite tailings-saw mud, the shrinkage and temperature shrinkage properties of the subbase material are optimized, and the antifreeze ability of the subbase material is improved by adding phase change microcapsules.

The invention provides a phase change-moisture absorption and drainage composite roadbed structure in a seasonal frozen region and an intelligent regulation and control method, and relates to the technical field of roadbed design and renovation. The roadbed structure is characterized in that a plurality of gradient phase change material layers are arranged on the top surface of a roadbed surface layer; the multi-layer gradient phase change material layer, the high moisture absorption and drainage geotextile layer and the drainage pipe system are arranged from top to bottom; the phase change temperature intervals and the phase change latent heat of the phase change layers in the multiple gradient phase change material layers are different; the high moisture absorption and drainage geotextile layer is used for guiding water in the soil body into the drainage pipe system; the drainage pipe system is of a porous structure with the inclination angle within the set angle range and is used for guiding water in the soil into the drainage ditch. And the intelligent regulation and control system is used for dynamically regulating the thermal resistance of each phase change layer and the opening degree of the drainage pipe. According to the invention, the time of the roadbed in a relatively stable physical state can be prolonged, so that the purpose of preventing and treating winter frost heaving, frost boiling and mud rising in a spring melting period and other diseases caused by temperature change of the roadbed in severe cold areas is achieved.

The invention discloses an in-situ solidification construction method for a highway shallow foundation in a water-rich section of a permafrost region. The in-situ solidification construction method comprises the following steps: step 1, preparation at the early stage of construction; secondly, steel sheet pile enclosure water insulation is conducted; thirdly, in-situ soil solidification construction is conducted; fourthly, dynamic compaction encryption treatment is conducted; step 5, quality detection and molding acceptance inspection; and step 6, subsequent environmental protection and safety guarantee. Three dimensions of a steel sheet pile waterproof technology, a high-weather-resistance composite curing material in-situ curing technology and a dynamic compaction technology are integrated, and a set of systematized and standardized construction scheme is formed. According to the multi-dimensional combined method, the foundation treatment effect is improved, the comprehensiveness and pertinence of construction are enhanced, and a more effective solution is provided for road foundation treatment in the water-rich section of the permafrost region.

The invention relates to the technical field of geotechnical engineering, in particular to a method and system for predicting the soil arching effect of soil between embankment piles under the coupling effect, and the method comprises the following steps: burying a test soil body into a model box in a layered manner, and presetting a data monitoring device to establish a multi-dimensional data monitoring array; the hydraulic gradient of the model box is regulated and controlled through an adjustable water pressure water pump, and pore water pressure distribution is obtained; applying a static load to the model box by using a hydraulic servo loader to obtain stress distribution of the test soil body; the model box is vibrated based on a hydraulic vibration exciter, and vibration displacement information is obtained; performing a multi-working-condition comparison test on the model box to obtain soil arch form evolution data, and establishing a quantitative correlation model; and constructing a soil arching effect prediction model in combination with a machine learning algorithm to realize prediction of the soil arching effect. The mechanical mechanism of the soil arching effect under the multi-factor coupling effect is researched, and a scientific basis is provided for design and construction of geotechnical engineering.

The invention discloses a hole slag back pressure backfilling and roadbed structure integrated construction technology, and belongs to the technical field of road construction. Comprising the following steps: grading and screening the tunnel hole slag into large / medium / fine three-level aggregate, and then crushing and recombining to form graded improved aggregate; constructing a multi-layer backfill structure of a base layer, a transition layer and a reinforcing layer; interface shear strength is achieved through the gravel-geogrid composite transition layer; adopting a vibratory roller to implement a static pressure and vibratory rolling combined process with adaptive levels; a coarse / fine-particle-size two-stage cement stabilized macadam layer is laid on the top to form a permeation drainage channel, and a transverse drainage blind pipe system is arranged to achieve three-dimensional drainage. According to the technology, the problems that in traditional hole slag backfilling, aggregate grading discreteness is large, shear failure is likely to be caused by sudden change of interlayer modulus, interlayer combination weakening is caused by uneven layered rolling energy transfer, and structure instability is caused by pore water pressure accumulation are solved, and hole slag resource utilization and roadbed structure performance collaborative improvement are achieved.

The invention discloses a comprehensive detection and evaluation method and system for the lap joint construction quality of new and old roadbeds, and the method comprises the steps: carrying out the fitting processing of j differential settlement values of a certain monitored section before a certain moment T and the time t, drawing a differential settlement-time relation curve, and obtaining the change rate of the differential settlement values at the moment T; obtaining differential settlement values and differential settlement value change rates of n monitoring sections at the T moment along the line, respectively drawing a distribution linear association diagram of the differential settlement values along with the course change of the length L of the detection route, and calculating to obtain an average value and a variance of the differential settlement values; calculating to obtain an average value and a variance of the differential settlement value change rate according to a distribution linear correlation graph of the differential settlement value change rate along with the course change of the detection route length L; constructing a construction quality comprehensive detection evaluation index, setting a new and old roadbed lap joint construction quality comprehensive detection evaluation index standard value, and performing evaluation according to the new and old roadbed lap joint construction quality comprehensive detection evaluation grade division table.

The invention provides a high fill roadbed settlement prediction method, and belongs to the technical field of engineering construction.The method comprises the steps that firstly, a large test box interface test system is established, and a 4 * 4 sensor monitoring network is arranged on the interface of filler and a foundation soil layer; the influence of different parameter combinations on interface mechanical properties is researched through a parameter change experiment system, and a parameter database is established; obtaining actual measurement data of typical engineering and determining a calibration coefficient; establishing an interface element model, and obtaining an interface friction angle, cohesion and rigidity parameters; calculating the deformation of each layer by adopting a layered accumulation method; introducing a time effect correction factor to consider consolidation characteristics; the slip influence is evaluated through an interface slip test, and the prediction deviation caused by neglecting the interface effect in a traditional method is corrected; and finally, constructing a deep learning prediction model, and verifying prediction precision and reliability through actually measured data.

The invention belongs to the technical field of road network generation, and discloses an overpass multilayer structure generation method considering a directed topological connection relationship, which comprises the following steps: obtaining overpass track data, generating a density grid map and a skeleton line based on the data, and obtaining a road geometric shape; defining a direction domain and center line rule, matching the direction cluster density grid map to the direction domain, and vectorizing according to the rule to obtain a directed center line in each direction; connecting the direction lines by the integral track center line to obtain an initial overpass map; setting an entrance and exit range, and screening a high-confidence track. And in combination with the high-confidence trajectory, matching the initial map with a map to obtain trajectory point road matching information. And carrying out topological check and correction on the matched information, and finally generating the directed three-dimensional vector flyover road. According to the method, the problem of complexity of overpass generation in road network construction is solved, information such as geometric morphology, topological connection and road direction of the overpass is extracted, and powerful support is provided for automatic generation of the road network.

The invention discloses a soft soil foundation embankment heightening and widening structure and a construction method, and belongs to the field of water conservancy projects. In order to solve the problems of uneven settlement, landslide instability and overlarge occupied area easily occurring when the soft soil foundation embankment is heightened and widened, the structure comprises precast concrete piles (top beams and ripraps are arranged on the tops of the piles) densely arranged at the slope toe outside the embankment, an inner side cantilever retaining wall (with drainage holes and a gravel inverted filter), geogrids laid in backfill soil in a layered mode, and CFG piles arranged on the lower portion in a plum blossom shape. The guardrail base and the flower bed are integrally poured with the retaining wall. The construction method comprises the steps of slide-resistant pile construction, earthwork excavation, CFG pile construction, retaining wall pouring, embankment body backfilling and embankment top road construction. Bidirectional control over settlement and horizontal displacement is achieved through cooperation of multiple structures, variable-stiffness leveling can be achieved by adjusting parameters of the CFG piles, and the variable-stiffness leveling structure has the advantages of skid resistance, stability, landscape optimization and land occupation saving and is suitable for soft soil foundation embankment upgrading and reinforcing projects.

The invention belongs to the technical field of roadbed construction methods, and particularly relates to a cement improved tailing roadbed construction method. The method comprises the following steps: S1, determining the water content and particle composition of the tailings; s2, calculating the average particle size of the tailings in each grade of particle size range; s3, calculating the thickness of a water film on the surface of the centrifuged tailings; s4, determining the cement dosage and the water-cement ratio in the cement-improved tailing roadbed material according to experience, and determining the water content control value of the cement-improved tailing roadbed material in the construction process; and S5, the tailings are evenly arranged on the roadbed, the water content of the tailings reaches the water content control value + / -1%, then cement is evenly spread, the cement and the tailings are mixed, leveling is conducted through a land leveler, and finally rolling forming is conducted through a heavy road roller. According to the method, when the use amount of the tailing raw material, the cement and the like changes, the field construction water content control value is calculated in real time, it is ensured that the performance of the cement-improved tailing roadbed material is optimal, and the engineering quality is improved.

The embodiment of the utility model provides a roadbed slope reinforcing device which comprises a supporting frame used for providing support and provided with a plurality of mounting connectors, reinforcing ribs are arranged in the supporting frame to improve the lateral pressure resistance, inclined wing faces are arranged on the two sides of the supporting frame, and embedded locking pieces are further arranged to ensure stable structural connection; the anchor rod is connected with the supporting frame, goes deep into soil and is used for anchoring the whole device in a roadbed slope; the reinforcing panel covers the outer part of the supporting frame and aims to form a continuous plane; the shear keys are installed between the supporting frame and the reinforcing panel, and shear force is transmitted through a meshing structure; wherein the embedded locking piece comprises a telescopic locking pin which is used for adjusting the locking force; a spiral blade is arranged on the anchor rod; and an expansion screw is arranged at the tail end of the anchor rod. Through the scheme of the embodiment of the invention, the soil lateral pressure resistance of the device can be improved.

The invention discloses a microbial material for reducing salt heave and frost heave of highway subgrade salinized soil as well as a preparation method and application of the microbial material, a microorganism is nitrogen-fixing bacteria and is classified and named as Neorhizobium alkalisoli XJIPC-GNJ0001, the strain is preserved in China General Microbiological Culture Collection Center (CGMCC) on January 20, 2025, and the preservation number is CGMCC No.33310. The invention further discloses a preparation method of the microbial material for reducing the salt heave and frost heave of the highway subgrade salinized soil and application of the microbial material for reducing the salt heave and frost heave of the highway subgrade salinized soil. The strain belongs to extremely halophilic bacteria and adapts to a strong alkali environment, and a microbial material prepared from fermentation liquor of the strain can reduce salt heave and frost heave of highway subgrade salinized soil. The preparation method is simple, low in cost and easy to produce, and the material is green, environment-friendly and good in stability. The microbial solid preparation of the novel alkali rhizobium and the fermentation liquor can be used as a cementing substance and forming power, is used for preparing a material for preventing salt heaving and frost heaving of road salinized soil, can relieve or reduce engineering diseases such as salt heaving and frost heaving in road subgrade filling in a salinized soil area, is beneficial to road subgrade protection and stabilization, and has a good application prospect. The resource utilization way of the salinized soil is widened, and the application prospect is wide.

The invention relates to quick-setting early-strength bubble light modified in-situ soil and a preparation method and application thereof.The quick-setting early-strength bubble light modified in-situ soil is prepared from foam and slurry according to the volume ratio of (1-3): 1, the slurry is prepared from, by weight, 0-265 parts of in-situ soil, 265-530 parts of quick-hardening sulphoaluminate cement and 132-398 parts of water, and the foam is prepared from a foaming agent and water. Compared with the prior art, the bubble light-weight modified in-situ soil has the characteristics of rapid hardening, early strength, light weight, adjustability and high fluidity, and meets the rapid traffic requirement of emergency repair of roads.