1766 results about "Road engineering" patented technology

The invention discloses a rock slope three-dimensional model and a block slide analysis method, and belongs to the entity structure space modeling and analysis field of rock engineering such as rock and earth engineering, mine exploitation, road engineering, water conservancy engineering and the like. The method comprises the following steps of: 1, acquiring engineering rock field structure initial data; 2, processing and extracting the engineering rock initial data; 3, constructing an engineering rock model; 4, identifying blocks and analyzing the stability; and 5, displaying the result. The method has the advantages that: the method realizes space modeling of the engineering rock slope and identification of key blocks, quickly identifies new structure surfaces in the engineering construction process, and can automatically search the key blocks, count the number and geometric information of the movable blocks and preliminarily calculate and analyze the mobility of the key blocks.

The invention belongs to the field of road engineering, and particularly relates to a hyperviscous and high-elastic asphalt modifier applicable to steel bridge deck pavement. The asphalt modifier comprises the following raw materials in parts by weight: 3-10 parts of junked tire rubber powder, 3-10 parts of polyethylene wastes, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-5 parts of styrene-isoprene-styrene block copolymer, 1-5 parts of terpene resin, 5-10 parts of solvent naphtha, and 0.3-0.7 part of alcohol ether carboxylate adhesion agent. In addition, a modified asphalt and amodified asphalt mixture are prepared on the basis of the modifier, the 60 DEG C dynamic viscosity of the modified asphalt prepared by applying the modifier can reach more than 300000Pa.s, and the performance grading reaches PG 88-28; and the asphalt mixture has favorable water stability, higher dynamic modulus, higher track dynamic stability and low temperature failure strain, and can resist complicated mechanics and temperature environment of a steel bridge deck.

The invention provides an environment-friendly silt curing agent, which is manufactured through the following steps: one or two among fly ash, calcium sulfate, sodium sulfate, sodium carbonate and potassium carbonate, one or two among slag, slag combination, potassium hydroxide, calcium oxide, sodium silicate or silicon dioxide, one or two among carbide slag, lime or gypsum, as well as one or two among triethanol amine surfactant, calcium lignosulfonate or sodium lignosulfonate form a plurality of optimal compound formulations according to respective attributes, are optimized, compounded, ground till the Brinell specific surface areas are between 300 and 900 m2/kg respectively and then mixed, wherein particle sizes are between 0.00040 and 0.5 mm. As a large amount of waste is utilized, the curing agent saves raw materials, solves the problems about waste discharge and environmental pollution, controls waste through waste, and has important significance to environmental protection. The invention aims to provide the environment-friendly silt curing agent which has strong adaptability to a plurality of types of silt and soil, is good in curing effect, good in durability after curing and capable of utilizing industrial waste, and can be widely applied to fill engineering, embanking or embankment reinforcement engineering, road engineering and other fields.

The invention relates to an asphalt mixture life prediction method considering a fatigue-creep interaction damage effect, and belongs to the field of road engineering. The method comprises the following steps: (1) determining a complex modulus of an asphalt mixture under the action of a period load; (2) determining a damage variable of the asphalt mixture; (3) building a creep damage equation and a fatigue damage equation of the asphalt mixture respectively; (4) building an asphalt mixture life prediction model under the combined action of creep damage and fatigue damage. Compared with a conventional asphalt mixture life prediction method, the viscoelastic behavior of the asphalt mixture is considered and a more accurate prediction model is built. The method accurately describes asphalt mixture damage failure process and rule, has the advantages of wide application range and reliable calculation results, and provides a more reliable method for structural design of an asphalt pavement.

The invention belongs to the technical field of road engineering, in particular to a color asphalt binder capable of being directly applied and a preparation method thereof. The binder consists of 25 to 38 percent of petroleum resin, 12 to 22 percent of aromatic oil, 8 to 15 percent of styrene-butadiene triblock copolymer (SBS), 28 to 32 percent of color pigment, 5 to 10 percent of abherent, 0.05 to 1 percent of plasticizer, and 0.05 to 1 percent of antioxidant. The binder has a simple preparation method, can meet the technical index requirements of various building asphalts by adjusting the content of the petroleum resin, the content of the aromatic oil and the content of the styrene-butadiene triblock copolymer. Color asphalt binders in red, yellow, blue and other colors can be produced by regulating the color pigment. Furthermore, in the process of transporting the color asphalt binder, heating transportation is not required, and a special tanker for transportation is not required, so that the problems of low transportation efficiency and difficult operation of the color asphalt are solved. Meantime, the storage time of the solid particular color asphalt binder is greatly prolonged, and the color asphalt binder is convenient to apply, and has positive effect on popularization and application of color asphalt pavements.

The present invention relates to asphalt road engineering, and is especially one stress absorbing asphalt macadam layer and its construction process. The stress absorbing asphalt macadam layer can absorb and reduce the stress of asphalt road surface or composite road surface and weaken the transmission of cracks to the surface asphalt layer. It consists of one macadam layer, one stress absorbing and binding layer and one connecting layer from top to bottom. Its construction process includes the steps of spreading connecting layer material onto the base layer, spreading the stress absorbing and binding layer and spreading the macadam layer. The stress absorbing and binding layer has material of polymer modified emulsified asphalt, high viscosity emulsified asphalt, hot SBS modified asphalt or rubber modified asphalt; and the connecting layer has material of kerosene diluted asphalt, high permeability emulsified asphalt, concrete interface adhesive, polymer modified emulsified asphalt or hot modified asphalt.

The invention discloses an automatic extraction method for road information based on point cloud, and relates to the fields of mapping and road engineering design and management. The automatic extraction method comprises the following steps: data acquisition: after the selection of a GNSS (Global Navigation Satellite System) base station and the qualified check of acquiring equipment are finished, point cloud data is acquired through a mobile platform; data preprocessing: the acquired original data is preprocessed to output needed point cloud data; point cloud filtering: the point cloud data is filtered through filtering processing software, and accurate point cloud classifying achievements are obtained by the automatic classification and local human-computer interaction classification; interest extracting: the filtered point cloud is used for extracting ground feature information, and the ground feature information is output by the needed format. The automatic extraction method has the following advantages: the precise extraction of two-dimensional and three-dimensional road information is realized under the condition of not interrupting the normal traffic operation; the deep processing additional value of preliminary survey phase achievements is improved; the integration of preliminary survey and location survey operations of roads is realized; and the entire construction cost of projects is largely reduced.

The invention belongs to the technical field of a building material used in road engineering, and specifically relates to drainage asphalt mixture for an ultra-thin wearing layer. The mixture comprises aggregated material, stuffing, high-performance asphalt and warm mixing additive; the maximal nominal size of the mixture is 6.7mm; the thickness of a pavement layer is 10-20mm; the aggregated material is basalt or dolerite; the used stuffing is mixture of limestone powder and common silicate cement, and the used high-performance asphalt is prepared from general modified asphalt by adding waste tire rubber powder which is 20-28% of weight of the asphalt and modifying. An ultra-thin finishing coat and low-temperature construction are realized by the asphalt mixture by adding the warm mixing additive; the ultra-thin wearing layer has the advantages of low construction cost, convenience in construction and the like, and is suitable for building of an asphalt concrete pavement and function-improving works of the pavement.

The invention relates to a testing device for simulating mechanical behaviors of a gravel soil subgrade under reciprocating traffic moving load. The device comprises a peripheral framework, a test sample box, an axial loading unit, a horizontal loading system and a data acquisition system, wherein the test sample box is arranged in the peripheral framework, a gravel soil subgrade test sample is filled in the test sample box, a road slab is paved above the gravel soil subgrade test sample, the axial loading unit comprises a trundle and a hydraulic loading system, the trundle is arranged on the road slab, the hydraulic loading system applies an axial pressure to the trundle, the horizontal loading system maintains the horizontal reciprocating movement of the trundle, and the data acquisition system is arranged at the four corners of the side wall of the test sample box. Compared with the prior art, the device disclosed by the invention can simulate the mechanical behaviors of the gravel soil subgrade under the reciprocating traffic moving load to obtain the relationship between gravel soil subgrade deformation settlement and parameters of loading time, loading frequency, axial load and the like, thereby reasonably guiding the engineering practice of road engineering construction and ensuring the stability of the gravel soil subgrade.

The invention discloses a crack resistance type cement stabilized macadam proportioning design method based on vibration test method. The design method is implemented according to the following steps:(1) preparing framework dense graded aggregate; (2) adding cement into graded aggregate to obtain a cement stabilized macadam mixture, and adopting vibration compaction test method to determine the maximal dry density and the optimal water content of the cement stabilized macadam mixture, wherein the added cement dosage accounts for 3-5% of the graded aggregate according to mass percent; (3) adopting the cement stabilized macadam mixture in step (2) and vibration compaction test method to prepare a cement stabilized macadam cylinder test piece with the dimension being 15cm in diameter * 15cmin height; (4) carrying out an unconfined compression strength test on the cement stabilized macadam cylinder test piece which is subject to 6 days of preserving and 1 day of water soaking, and designing the cement dosage according to the result of the unconfined compression strength test. The cement stabilized macadam designed by the invention can better form a compact framework structure, featuring unlikely dissociation, the maximal dry density, the optimal water content and saving of 30-40% cement use amount, has the advantages of high strength, good crack resistance and good scour resistance, and basically solves the problems of serious crack of cement stabilized macadam which perplexes road engineering circles, at home and abroad, all the time.

The invention discloses a preparation method of a phenolated lignin amine cationic emulsifier. The method comprises the following steps: heating an alkaline liquid of alkali lignin and a proper amount of phenol to 70-100 DEG C and reacting for 1-3h, then, acidizing a reaction liquid to realize pH=2.5 with 1 mol/L hydrochloric acid, performing suction filtration, washing with hot water at 80-100 DEG C until free phenol disappears completely, thus obtaining phenolated lignin; dissolving the phenolated lignin in a NaOH liquid with mass fraction of 10% and regulating pH to 10.5-12, then, further adding a mixed liquid of a certain amount of small molecule polyamine and 37% formaldehyde, reacting for 3-5h at 90 DEG C, then, introducing amine methyl hydrophilic groups into the phenolated lignin, thereby obtaining the cationic emulsifier which has positive electricity under the condition of diluted acid. In comparison with the cationic emulsifier modified by the lignin which is not phenolated, the emulsifier provided by the invention has higher surface activity, stronger Zeta potential and stronger emulsion stability, and can be widely used in the fields of road engineering, building waterproofing, material corrosion prevention, water conservancy construction, and so on.

The invention provides a preparation method of an emulsified asphalt cold recycling asphalt mixture. The preparation method relates to the field of road engineering and includes the following steps: obtaining milling samples of old asphalt pavement, determining grading of filler, determining weight percentage of rough milling materials, fine milling materials, cement and mineral powder in raw materials, determining optimum moisture content a, determining optimum dosage of emulsified asphalt, determining optimum moisture content b, conducting checking and stirring the emulsified asphalt cold recycling asphalt mixture. The preparation method is rigor. Determination of optimum usage and optimum moisture content of emulsified asphalt gives consideration to the lubrication effect of water and asphalt in the molding process. The optimum moisture content and the optimum dosage of the emulsified asphalt are determined through checking. The preparation method adopts the processes of rotating, compacting, once molding and nourishment, accords with reality, and is reasonable and capable of meeting requirements for actual engineering.

The invention discloses a waste rubber powder modified asphalt composition and a preparation method thereof. The waste rubber powder modified asphalt composition comprises the following components in percentage by weight: 60-94 percent of basic asphalt and 6-20 percent of activated waste rubber powder. The preparation method comprises the following steps: adding the activated waste rubber powder into the melted basic asphalt for fully mixing to obtain the waste rubber powder modified asphalt composition. The asphalt composition disclosed by the invention is high in storage stability and low in cost, and the raw materials are easily available; the asphalt component has a wide application prospect in the fields of road engineering, waterproof coiled materials and the like.

The invention discloses a production method of recycled aggregates of building wastes. The method comprises the following steps: (a) pre-screening; (b) impurity removal; (c) primary crushing; (d) primary screening; (e) secondary crushing; (f) secondary screening; (g) material division; (h) mixing of the recycled aggregates; (I) homogenization and entrance into warehouse. According to the production method of the recycled aggregates of the building wastes, based on a series of treatment processes, the building wastes are manufactured into engineering dinas (also named as aggregates), so that the problems of land occupation and environment pollution caused by stacking the building wastes are solved, a large quantity of dinas for building engineering can also be provided, and the method is energy-saving and environmentally friendly; meanwhile, the problems of energy sources and environment caused in a manual dinas exploitation process also can be solved. The recycled aggregates produced by using the production method is stable in performance, and can be widely applied to construction of various kinds of building engineering and road engineering.

The invention provides wear-resisting concrete doped with nickel slags. The wear-resisting concrete comprises the following components by weight: 270-420g of cement, 20-50g of nickel slag powder, 35-75g of coal ash, 150-190g of water, 250-500g of nickel slag fine aggregates, 210-440g of nickel slag coarse aggregates, 320-500g of sand, 740-1176g of stone and 1.8-9g of water reducing agents. Compared with common concrete, the concrete has good wear-resisting performance, the work performance of the concrete is good, and the anti-fracture strength and the compressive strength are high. Additionally, the nickel slags serving as the coarse and fine aggregates replace a part of natural gravels, the quantity of the natural gravels used for the concrete is reduced, the production cost is reduced, and therefore, the utilization rate of the nickel slags is improved and the energy and resources are saved. The concrete can be used for floors and road surfaces in building projects and can be also used for roads, road engineering and projects with a requirement for wear resistance, and accordingly the use range of the nickel slags is widened.

The invention belongs to the technical field of building materials in road engineering and particularly relates to an open-gradation storage type asphalt mixture for patching of a draining asphalt pavement. The mixture comprises aggregate, a filler, a fiber stabilizer and diluted asphalt, and the largest nominal grain size of the mixture is 13.2mm. The aggregate comprises coarse aggregate and fine aggregate, the coarse aggregate is made of basalt or diabase, the fine aggregate is made of limestone, and the largest nominal grain size of the aggregate is 13.2mm. The filler is made of limestone ore powder. The fiber stabilizer is made of a lignin fiber or a basalt mineral fiber or a mixed fiber of the lignin fiber and the basalt mineral fiber, and the dosage of the fiber stabilizer is 0.1%-0.6% of mass of the mixture. The diluted asphalt is diluted polymer modified asphalt, and a modifier in the diluted asphalt is a patented product RST modifier produced by Shanghai Pudong Road and Bridge Construction Co., Ltd. The asphalt mixture has the advantages of being long in storage time, convenient and quick to construct and the like.

The invention discloses a geotechnical model test system based on macro-micro mechanics as well as an elaboration test method. The test system analyzes and processes shot digital images in a model test box in real time through two analysis systems in a computer. The test method organically integrates an indoor model test, field soil observation analysis of foundation soil, partial microscopic observation analysis, numerical value simulation of microscopic mechanics and continuous-discrete coupled numerical value simulation. The invention is suitable for the test research of geotechnical engineering such as building engineering, road engineering, bridge engineering, harbor engineering, river-coast engineering and coastal engineering, can solve common engineering problems and can upgrade the understanding level and the research level to important key problems, such as the influence on extreme environmental conditions of key project construction projects and engineering catastrophes, andthe like.

The invention belongs to the technical field of road engineering, and in particular relates to a direct-feeding type asphalt warm-mix modifier (trade mark name: Liyan). The modifier comprises the following components in parts by weight: 60-80 parts of waste regenerated plastic, 25-40 parts of organic lubricating agent and 5-15 parts of inorganic reinforcing agent. The preparation and use processes of the asphalt warm-mix modifier provided by the invention are simple and environmentally-friendly, and the prepared asphalt warm-mix modifier has stable property, long storage time, low energy consumption and obvious viscosity reduction effect and is suitable for warmly mixing and modifying various asphalt mixtures. The warm-mixing modifier is capable of effectively reducing the viscosity of asphalt while ensuring or modifying the construction and pavement performances of the asphalt mixtures, thereby realizing the purposes of reducing viscosity and temperature, saving energy and reducing consumption and reducing pollution in a true sense.

The invention belongs to the field of road engineering and provides an anti-rutting additive containing direct coal liquefaction residue. The anti-rutting additive containing direct coal liquefaction residue comprises the direct coal liquefaction residue, a thermoplastic elastomer and an additive, wherein the weight ratio of the direct coal liquefaction residue to the thermoplastic elastomer is 1 to (1-4), and the additive accounts for 5-20% of the sum of the weights of the direct coal liquefaction residue and the thermoplastic elastomer. Based on resource conservation and environmental friendliness, comprehensive advantages of the direct coal liquefaction residue and macromolecules are utilized, so that the prepared asphalt mixture has excellent anti-rutting performance and good low-temperature performance and durability, construction cost is reduced while anti-rutting performance of a road is improved when the prepared asphalt mixture is applied to a middle surface layer, and service life of the road is prolonged.

The invention discloses a fluidized bed combustion ash and high titanium slag compounded stable pavement base material. The fluidized bed combustion ash and high titanium slag compounded stable pavement base material is formed by mixing 30-90wt% of fluidized bed combustion ash with 10-70wt% of high titanium slag. The fluidized bed combustion ash, the high titanium slag and water are stirred and mixed, and the obtained mixture is molded and maintained to make a fluidized bed combustion ash and high titanium slag compounded stable pavement base. The compounded stable pavement base material completely utilizes difficult-treatment and high-discharge-amount industrial wastes comprising the fluidized bed combustion ash and the high titanium slag, contains no lime or fly ash, and has better performances than traditional lime-fly ash stable pavement base material; and the compounded stable pavement base material has the advantages of low cost, no consumption of natural resources, simple and easy preparation method, suitableness for being used in areas short of traditional road engineering materials, substantial economic benefit, wide market prospect and strong practicality.

The invention belongs to the road engineering application field, and discloses a test method of doping quantity of a modifier in an SBS modified asphalt. The test method comprises the following steps: weighing SBS modified asphalt samples with the doping quantity of various standard modifiers, determining degree of unsaturation of the samples respectively, performing linear fit by the doping quantity of the modifiers of the SBS modified asphalt samples with the doping quantity of various standard modifiers and the determined degree of unsaturation, and establishing a mathematical model; and sampling at a construction site, and calculating the doping quantity of the modifier in the SBS modified asphalt to be tested according to the determined degree of unsaturation of the SBS modified asphalt to be tested. The test method of the invention is applicable to content detection of various SBS asphalt modifiers in the construction site environment, and plays a positive role of controlling quality of the SBS modified asphalt, ensuring pavement durability, preventing improper profit-making of a supplier, promoting market standardization and creating good social and economic benefits.

The invention relates to mineral fiber-modified flexible rubber concrete. The mineral fiber-modified flexible rubber concrete comprises rubber cement concrete, chopped basalt fiber and a dispersant methylcellulose, wherein the rubber cement concrete consists of rubber particles, cement, sand, stones, a water reducing agent and water; and the chopped basalt fiber is 0.1 to 0.5 percent of the volume of the rubber cement concrete, and the dispersant is 0.05 to 0.2 percent of the weight of the water. The concrete is applicable to road engineering, and has high compressive strength, bending tensile strength and deformability, and low modulus of elasticity.

The invention discloses a composite type pavement structure and a pavement method, and relates to a road engineering structure and a construction method thereof. In the invention, the thermal expansion coefficient, the cement concrete and the fiber-reinforced composite material substrate which performance is near to the steel plate are adopted to reinforce for the bottom surface of the asphalt layer; thus improving the performance of anti-fatigue and anti-reflecting crack of the asphalt surface course, effectively preventing the lower bearing layer from being eroded due to infiltration of the rain water from the asphalt surface course, avoiding bonding problem between the asphalt surface course and the cement concrete or the steel plate, increasing stiffness of the steel bridge surface, and particularly reinforcing the steel bridge surface the steel plate of which has insufficient thickness, so as to reduce the thickness of the asphalt surface course, avoid the damages, such as cracking and falling of the asphalt pavement layer caused by the insufficient thickness of the steel bridge surface and the like.

The invention relates to a material for a waste asphalt regeneration pavement and a preparation method of the material and belongs to the field of construction and maintenance of road engineering. For improving the property of waste asphalt and lowering the maintenance cost of the road, the invention provides a material for waste asphalt regeneration pavement and a preparation method of the material. The material for the waste asphalt regeneration pavement comprises lightweight oil, plasticized components, a modified main agent, tackifying components and a stabilizer, and the selection range and constitution of all components are specifically limited. Aging tests and low-temperature performance show that the viscoplastic performance of the regenerated asphalt and the anti-crack property and durability of the pavement can be greatly improved when the material for waste asphalt regeneration pavement is used for regeneration of the waste asphalt; therefore, the material for waste asphalt regeneration pavement has a bright application prospect.

The invention discloses a seamless bridge deck expansion joint structure for road engineering and a construction process of the seamless bridge deck expansion joint structure. The seamless bridge deck expansion joint structure for the road engineering comprises a bridge body and an expansion join, wherein concrete paving layers are arranged on the bridge body; a preserved notch is formed between two adjacent concrete paving layers; a clearance is reserved between two adjacent bridge bodies or between the bridge body and a bridge abutment; the seamless bridge deck expansion joint structure further comprises an elastic-plastic body and a backing plate; the backing plate is positioned on the bottom surface of the preserved notch for closing the clearance; the backing plate is arranged below the elastic-plastic body; the elastic-plastic body is positioned in the preserved notch for forming an elastic-plastic body expansion joint; and asphalt concrete layers are paved on the concrete paving layers and the elastic-plastic body expansion joint in a penetrating way. According to the seamless bridge deck expansion joint structure disclosed by the invention, a real seamless bridge deck can be formed; and the seamless bridge deck expansion joint structure has the advantages of higher structural safety, greater convenience in construction and convenience in replacement.

The invention discloses an ecological road engineering system, and belongs to the technical field of city road building. A carriageway and a non-motor way are each provided with a water-permeable bituminous pavement, namely a porous bituminous pavement, the porosity is higher than 20% after compaction is carried out, and drainage channels can be formed inside a bituminous mixture. Rainfall runoff on the pavements is collected into water storage devices embedded into a medium divider and a lateral divider and is gradually and slowly released to surrounding soil, and therefore the growth requirement of plants is met. By means of the ecological road engineering system, self-organization irrigation of the green belt plants is completed, the manual irrigation cost is reduced, and water resources are saved; soil irrigation is more thorough, a small amount of manual irrigation and a small amount of rainfall enable water to difficulty reach a soil layer with a certain depth, and therefore growth of tree root systems is not facilitated; meanwhile, a real-time monitoring system provides scientific data information for maintenance and effective detection of the ecological road engineering system; manual energy resources and power input are not needed in the complete system, the operation and maintenance cost is low, and the practical value is achieved; and through practices in one year, the system better runs, and the popularization value is achieved.