820 results about "Base course" patented technology

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 discloses an asphalt pavement base crack identification method and device based on a ground penetrating radar, and belongs to the technical field of road engineering pavement maintenance. The method comprises the following steps: 1) carrying out crack image identification on a radar slice map through a YOLOv8n model; 2) based on an identification result, extracting A-scan signals of a crack area, and classifying time-frequency features by using a Light GBM model; and 3) clustering classification results through a'multi-segment clustering + PCA 'analysis method, and filtering false detection cracks. The device is used for executing the method. According to the method, the map and the time-frequency characteristics are fused, the problem that the false detection rate is high due to subjective labeling or objective interference of a single identification method is solved, experiments show that the false detection rate is reduced to 2.8% from 11.2%, and the accuracy and engineering applicability of crack identification are improved.

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 relates to the technical field of pavement materials, in particular to a solid waste-based cementing material stable coal-based solid waste road base material and a preparation method thereof. According to the material, secondary modified regenerated coarse and fine aggregate is used as a framework, coal gangue powder and granulated blast furnace slag micro powder are matched, and two-step engineering of dopamine / double-amino-terminated polyethylene glycol co-deposition grafting and high-modulus silicate pre-coating is adopted, so that the synergistic improvement of the surface wettability and the interface density of the aggregate is realized. The system is cooperated with low-modulus excitation liquid and polypropylene fibers, and the mixing uniformity of the material and the quality of an interface transition area are optimized through a thin-pulp stone-wrapping and densification segmentation process. The material gives consideration to high resilience modulus, rut resistance and durability, significantly reduces the problems of high water absorption, weak interface, early cracks and the like of the recycled aggregate, is adaptive to a traditional road construction window, and has good application prospects.

The application relates to the technical field of waterproof coiled materials, in particular to a preparation method of an anti-aging modified asphalt waterproof coiled material, which comprises a polyethylene film, a base layer and a modified asphalt base body, wherein the modified asphalt base body comprises the following raw materials in parts by weight: 45-60 parts of asphalt, 10-15 parts of SBS elastomer, 8-12 parts of a softening agent, 3-5 parts of a waterproof functional agent, 4-6 parts of an anti-aging agent, 5-9 parts of SBR, 5-10 parts of a composite filler and 0.03-0.05 parts of an initiator; the anti-aging modified asphalt waterproof coiled material prepared by the method has excellent waterproof performance, heat aging resistance and ultraviolet aging resistance, and the anti-aging modified asphalt waterproof coiled material also has a complex network structure, which endows the base body with excellent mechanical properties.

The invention discloses a nondestructive testing method and system for the modulus of an asphalt road structure layer, and belongs to the technical field of nondestructive testing. According to the structure size of an actual to-be-tested road, a finite element model of the asphalt road structure layer is established, and a deflection point set corresponding to actual deflection detection and a dynamic drop weight load loading area are created; road structure parameter combinations are generated, mechanical responses of the asphalt road structure layer finite element model established by different road structure parameter combinations under the dynamic drop hammer load are calculated in a dynamic drop hammer load loading area, deflection values of a plurality of deflection points in a deflection point set are obtained, a deflection basin database is constructed to serve as a training sample, and the dynamic drop hammer load is calculated; the deflection values of the multiple deflection points serve as input, parameters of the surface layer modulus, the base layer modulus and the soil base modulus serve as output, and an inverse calculation model used for conducting nondestructive testing on the asphalt road structure layer modulus is obtained through training. According to the method, the structural layer modulus can be obtained by directly inputting deflection value data, so that the back calculation process is more accurate and efficient.

The invention discloses a polymer emulsion composite modified road base material and a preparation method thereof, and belongs to the technical field of traffic infrastructure engineering materials. The polymer emulsion composite modified road base material is prepared from the following raw materials: graded aggregate, super sulfate cement or geopolymer cement, water for mixing, vinyl acetate-ethylene (VAE) copolymer emulsion and a silane coupling agent. The preparation method comprises the following steps: mixing the VAE emulsion with water for mixing to obtain a polymer diluent; mixing graded aggregate with an inorganic cementing material, then adding the polymer diluent, and mixing to obtain a mixture; and then paving, compacting, forming and curing are carried out. By forming a VAE flexible network-C-S-H / ettringite hybrid network, the material has the remarkable advantages of higher mechanical strength and low cost, and can greatly improve and enhance the crack resistance and durability of the road base.

The invention discloses a geogrid and EICP synergistically reinforced soil embankment structure and a construction method, and relates to the technical field of soil embankment structures. Comprising a pavement base layer, an embankment bearing layer and a natural soil foundation layer, and the natural soil foundation layer is used as a soil embankment structure support and is arranged at the bottommost layer; the pavement base layer is used for bearing an upper driving load and uniformly transferring the upper driving load to the embankment bearing layer below; and the embankment bearing layer is used for bearing the upper load transmitted by the pavement base layer. The engineering performance is improved through the multi-layer synergistic effect, the core reinforcing layer is of an innovative space grid structure and is composed of a prefabricated geogrid, a grid support arranged in the inclined direction and a rigid stress plate frame, a three-dimensional force transmission network is formed, the limitation of a traditional reinforcing method is broken through, and the engineering performance is improved. In addition, the grating support is arranged at a specific angle, the structural rigidity is guaranteed, and the stress concentration phenomenon is avoided.

The invention discloses an expressway pit pond early warning method and system based on time sequence feature fusion, and relates to the technical field of intelligent traffic monitoring and road maintenance. The method comprises the following steps: S1, collecting multispectral image information of a road surface, synchronously obtaining external information, and respectively generating multispectral and external data sets; s2, correcting and fusing the multispectral data, extracting multidimensional features, and constructing a time sequence optimization feature vector in combination with external data; s3, inverting states of a bonding layer, a base layer and a surface layer in the pavement according to a mapping relation between spectral characteristics and structure parameters, and generating an implicit structure health index; s4, taking the time sequence optimization feature vector, the implicit structure health index and the external data set as input, and utilizing an LSTM model to predict a pit-pond formation probability and a development trend; and S5, calculating a dynamic risk level according to a prediction result. Through fusion analysis of multispectral time sequence characteristics and structural health states, full-period early warning from early damage to forming damage of a pit and a pond is realized, and support is provided for accurate maintenance.

The invention relates to a road surface base material for a harbor industry solid waste-based cargo storage yard and a preparation method of the road surface base material, and belongs to the technical field of road engineering. The storage yard pavement base material is mainly composed of dredged mud and sand, broken stones, activated iron smelting waste residues, water, a solid waste-based cementing material and cement. The invention also provides a preparation method of the storage yard pavement base material. According to the method, solid waste resources in the port-near industrial park can be effectively utilized, and environmental pollution caused by solid waste stacking is reduced. And the low-value solid waste can be effectively utilized for green building material production, so that the green building material production cost is reduced. The carbon emission can be effectively reduced, and the development of green and low-carbon economy of the harbor industry is assisted.

The invention discloses a foam light soil upright roadbed pouring method, and belongs to the technical field of upright roadbed construction, a raw material proportioning processing module and a pouring processing module are included, a foaming agent diluent is prepared into foaming liquid through a physical method, then compressed air is injected into the foaming liquid to prepare foam, and the foam light soil upright roadbed is formed. The foam, the cement, the active admixture, the water, the additive, the sandy soil and the industrial waste residue material are mixed and stirred according to a preset proportion to prepare a to-be-poured mixed solution, the to-be-poured mixed solution is conveyed to a pouring area through a pipeline, and layer-by-layer pouring is carried out. The method is designed for the situation that the high-fill soft soil upright roadbed is prone to collapse, cement paste and foaming foam are prepared and poured into the upright roadbed according to the preset proportion, layer-by-layer pouring is adopted, EPS foam plates are used for partitioned pouring, the pouring quality is guaranteed, meanwhile, the pouring efficiency can be remarkably improved, and the construction period is shortened; and the longitudinal and transverse gradients are adjusted by using a base material, so that the slope surface of the whole upright roadbed meets the design requirements.

The invention relates to the technical field of asphalt pavement structure design, in particular to a heavy-load durable asphalt pavement gradient structure in a multi-field coupling environment and a design method, and the structure comprises a high-modulus base layer, a tough middle layer and an anti-slip surface layer which are sequentially stacked from bottom to top; the dynamic modulus of the high-modulus base layer is larger than or equal to 14,000 MPa, the thickness of the high-modulus base layer is 18-25 cm, the fracture energy of the tough middle layer is larger than or equal to 1.5 kJ / m, the thickness of the tough middle layer is 8-12 cm, the structural depth of the anti-skid surface layer is larger than or equal to 0.8 mm, the thickness of the anti-skid surface layer is 4-6 cm, and the modulus gradient ratio of the base layer to the middle layer to the surface layer is (2.8-3.5): (1.4-1.8): 1. According to the method, a simulation model for coupling a temperature field, a humidity field and a heavy load stress field and a freeze-thaw damage factor quantification formula are established, so that dynamic analysis of a multi-factor collaborative degradation effect such as freeze-thaw cycle, high-temperature rutting and interlayer shear is realized, and the performance prediction precision under the environment and load coupling action is greatly improved.

The present application relates to a kind of anti-cracking building solid waste road flexible base mixture and its preparation method, base mixture includes building solid waste mixed aggregate, pitch, mineral powder;Building solid waste mixed aggregate is composed of broken concrete aggregate, broken brick, broken ceramic, broken glass, the mass ratio of broken concrete aggregate, broken ceramic, broken glass in the coarse aggregate of building solid waste mixed aggregate is (68-74):(23-29):(0.1-0.6);Pitch is heavy intersection 70 # matrix asphalt or 90 # matrix asphalt any one or combination thereof;Mineral powder is limestone mineral powder with 90%-100% purity, particle diameter is 0.8um-12um.The present application can reduce the crack of road base caused by temperature shrinkage and dry shrinkage on one hand, effectively prevent the phenomenon that base layer cracking leads to surface layer reflection crack;On the other hand, building solid waste is applied to road base, not only reduces material cost, saves natural mineral resources, but also can protect ecology, solve environmental pollution and other problems, with obvious environmental benefits, economic benefits and social benefits.

The invention discloses a method for determining an initial modulus of a semi-rigid base of an in-service asphalt pavement, and relates to the technical field of road engineering, a preset monitoring point of the in-service asphalt pavement is detected through a drop weight deflectometer, and a base modulus value is obtained through back calculation based on a deflection detection result; based on the transverse distribution coefficient of the carriageway, respectively calculating the accumulated axle load action times of the preset monitoring points; establishing a basic layer modulus damage model with basic layer initial modulus parameters by utilizing the structure behavior equation; and detecting basic layer modulus values under different accumulated axle load action times by using a drop weight deflectometer, performing regression fitting to obtain model parameters, obtaining a complete basic layer modulus damage model, and obtaining a basic layer initial modulus. According to the method, the initial modulus of the base layer is determined through the drop weight deflectometer.

The invention discloses an asphalt mixture for an anti-crack ultrathin overlay and a preparation method thereof, the asphalt mixture comprises 45-60 parts of 5-10 mm graphite coated coarse aggregate, 10-15 parts of 3-5 mm graphite coated coarse aggregate, 20-30 parts of 0-3 mm graphite coated fine aggregate, 2.0-4.0 parts of mineral powder and 4.8-5.8 parts of high-performance modified asphalt, wherein the modified asphalt is prepared from 90 parts of matrix asphalt, 7-8 parts of a six-arm star-shaped SBS modifier, 1-2 parts of oxidized polyethylene, 2-4 parts of rubber oil, 0.1-0.13 part of a sulfur stabilizer and 1-2 parts of conductive carbon black, an aggregate graphite coating layer and grading design are optimized, a dynamic compensation proportioning method is matched, a high-speed shearing and low-speed stirring coupling process is adopted in the preparation process, and the modified asphalt is prepared. Stable performance of the modified asphalt is ensured; the method is suitable for construction of an ultrathin overlay with the thickness of 1.5-2.0 cm, is high in durability, can prevent upward development of base layer cracks through the property of self-repairing at the temperature of 60 DEG C or above, and has enough crack resistance.

The invention relates to a device and method for measuring bonding-sliding friction parameters between an asphalt pavement base layer and a cushion layer, and relates to the technical field of road engineering asphalt pavements, and the device comprises a test piece restraining mechanism which is of a double-layer collaborative frame structure and comprises an upper test piece bearing part and a lower test piece fixing part, the upper-layer test piece bearing part is used for accommodating a base-layer sliding test piece, the lower-layer test piece fixing part is used for accommodating a cushion-layer sliding test piece, the upper-layer test piece bearing part and the lower-layer test piece fixing part are aligned up and down, plate surfaces are overlapped, and a real interface contact state of a base layer and a cushion layer is constructed. According to the invention, the double-layer square test piece, the horizontal thrust device and the electronic measuring equipment are organically integrated with the counterweight load, so that the accurate measurement of the bonding-sliding friction parameters between the base layer and the roadbed cushion layer is realized. The integrity and the test precision of the interface are ensured, the stress state of the pavement base is truly represented, and high-precision characterization of bonding-sliding friction parameters is realized.

This invention relates to a pavement structure and its installation method. The pavement structure includes a main body, which comprises a base layer, a concrete layer, and a first bonding layer. The first bonding layer is disposed between the base layer and the concrete layer to bond the base layer and the concrete layer. A storage tank is fixedly disposed on the side of the main body. The storage tank is used to store an aqueous solution of light stabilizer, and the top of the storage tank is provided with a feeding port, in which a plug is detachably installed. The main body also includes a hydrophilic polymer fiber mesh, which is laid on the concrete layer and extends into the storage tank from the side. The polymer fiber mesh can adsorb and disperse the aqueous solution of light stabilizer on it. The surface tension of the fibers promotes the flow of liquid, and the aqueous solution of light stabilizer in the storage tank is uniformly absorbed and dispersed throughout the pavement structure, extending the UV resistance of the pavement structure and ensuring the full service life performance of the concrete.

The application discloses a whole-house floor tile paving method, comprising the following steps: cleaning a base layer; uniformly mixing blast furnace slag and sand and uniformly dry paving the blast furnace slag and sand on the base layer to form a dry paving layer; determining a paving position of the floor tile on the dry paving layer; cleaning the floor tile and pre-wetting a sticking surface of the floor tile; uniformly spraying an alkali activator to the paving position of the floor tile, and then placing the floor tile flat to make the floor tile tightly combined with the dry paving layer; and cleaning the surface of the floor tile. The application has the beneficial effects that: the used gel material has high early strength, the blast furnace slag and sand are used for whole-house paving, the activator is pre-prepared, so that the construction period can be greatly saved; the blast furnace slag and sand are compacted after being used for whole-house paving, and the compacted blast furnace slag and sand are subjected to levelness verification, so that the deviation caused by manual paving and manual mortar stirring of workers is small compared with single paving; and the paving ground can be quickly put into normal use due to the fast bonding property of the used gel material.

The application discloses a method for determining the optimal spraying time of a road penetration layer and a sealing layer, comprising the following steps: preparing semi-rigid base mixture according to design requirements and laying the semi-rigid base; preparing penetration layer material and sealing layer material according to design requirements respectively and laying the penetration layer and the sealing layer; preparing asphalt sub-base mixture according to design requirements and laying the asphalt sub-base; preparing shear test pieces on the semi-rigid base asphalt pavement formed by spraying the penetration layer and the sealing layer with different spraying time combinations, and performing shear tests respectively, and performing multi-stage verification on the shear test results, so as to determine the optimal spraying time combination of the road penetration layer and the sealing layer. The application can accurately determine the optimal spraying time combination of the penetration layer and the sealing layer, improve construction efficiency and reduce maintenance cost. The determined spraying time combination of the penetration layer and the sealing layer will not cause the semi-rigid base to crack, the interlayer adhesion between the semi-rigid base and the asphalt sub-base is firm enough, and the service life of the road is improved.

The roadbed and pavement structure comprises a gravel sand layer, a coarse sand layer, a graded sand grain layer, a coarse sand filter layer, a subbase layer, a scoria layer and a surface layer, wherein the gravel sand layer is transversely laid on the lower layer of the coarse sand layer, the coarse sand filter layer is located on the upper layer of the graded sand grain layer, the coarse sand filter layer is a longitudinal and transverse structure layer laid on the lower layer of the subbase layer 5, the subbase layer and the volcanic cinder layer are alternately laid to form a compaction layer, and the compaction layer is a two-way transverse slope with the gradient being 0.1%-0.2% and a two-way longitudinal slope with the gradient being 0.3%-0.4% in the width direction of the road surface. Drainage columns are distributed on the compaction layer along the width direction of the pavement in a spaced matrix manner; the surface layer comprises an upper surface layer and a lower surface layer, the upper surface layer is positioned above the lower surface layer, and a thermal insulation layer is arranged between the lower surface layer and the upper surface layer. The roadbed and pavement structure solves the problems that the drainage effect of an existing road is not ideal, and the roadbed and pavement structure is very easy to damage.

The application provides a quick-setting anti-freezing geopolymer pavement base material and a preparation method thereof, and belongs to the technical field of geopolymer materials. The application takes red mud and titanium white slag as precursor materials, takes carbide slag as an alkali activator, and simultaneously adds anti-freezing reinforcing materials compounded by white mud, ceramic powder and brick powder. The geopolymer pavement base material is formed by compounding multiple components, fully utilizes multiple high-alkaline and silicon-aluminum-rich solid waste resources, has the comprehensive advantages of low carbon, environmental protection, low cost, short construction period, excellent anti-freezing performance and the like, breaks through the technical bottlenecks of slow low-temperature setting and poor durability of the pavement base material in cold regions, and is suitable for highway, municipal road and border road engineering in high-cold regions. The application has important engineering significance and popularization value for green traffic infrastructure construction in cold regions.

This utility model discloses a side-limiting device for cement-stabilized crushed stone base course of highways, belonging to the field of highway technology. It includes a pusher plate with a first connecting frame fixed on one side and a second connecting frame fixed on the other side. Limiting side baffles are provided on both sides of the pusher plate. This utility model includes an adjustment component, which allows an electric telescopic rod to move the limiting side baffles via the connecting plates, automatically adjusting the position of the limiting side baffles to adjust the limiting position of the crushed stone base course. Operation is convenient, and the rear baffle can cover the gap between the limiting side baffles and the pusher plate, preventing it from affecting the limiting effect. This utility model also includes a stabilizing component, where the lower end of the limiting side baffle is rotatably connected to a support roller via a positioning shaft. This supports the limiting side baffle, making its movement more stable, and reduces friction during rotation, preventing wear on the limiting side baffles.

The utility model discloses an asphalt pavement self-drainage structure, which particularly relates to the technical field of road engineering, and comprises a foundation layer, a broken brick layer and a cement layer which are sequentially arranged on the foundation layer, a rubble layer paved above the cement layer and an asphalt layer paved above the rubble layer, the rubble layer extends out of two sides of the asphalt layer, the broken brick layer and the cement layer, and main drainage grooves are formed in the two sides of the gravel layer correspondingly. According to the asphalt pavement self-drainage structure provided by the utility model, the gravel layer and the asphalt layer are paved on the original cement layer, so that rainwater partially permeates when falling onto the asphalt layer, and is drained towards two sides along the cement layer through the permeation of the gravel layer; rainwater on the upper portion of the asphalt layer is discharged towards the two sides of the asphalt layer and flows into the main drainage groove through the gravel layers on the two sides of the asphalt layer to be collected and discharged, then the rainwater is guided to flow into the main drainage groove to be collected under the condition that an original cement layer is not damaged, and the rainwater discharging effect is improved.

The invention discloses a construction method for stabilizing a macadam road base by using a super-retarding cementing material, and relates to the technical field of road bases. Comprising the following steps: dividing the super-retarded cementing material stabilized macadam road base into a plurality of layers, adding a cementing material into a macadam material conforming to a grading curve according to a set gradient, measuring the compressive strength of the macadam material, and comparing the compressive strength with performance requirements to obtain the addition amount of the cementing material in each layer; respectively adding mixing water in a set proportion into the gravel material to obtain a gravel mixture, and testing the compressive strength of the gravel mixture for multiple times at a set time interval to obtain the component proportion of the gravel mixture with long allowable delay time; according to the gravel mixture transportation time of the construction site and the allowable delay time of the gravel mixture used by each layer, the allowable construction time and the allowable construction length of each layer are determined; during construction, the upper layer is paved and rolled within the initial setting time of the lower layer. A multi-thread program type three-layer continuous paving process is adopted for construction, the maintenance time of the sub-base layer and the lower base layer is shortened, the construction period can be shortened, and the maintenance cost is saved.

This invention provides a perimeter structure and construction method for road manhole covers. The perimeter structure includes a base reinforcement section, formed by pouring a first layer of concrete into the excavated surface of the roadbed, with multiple layers of steel mesh installed within the base reinforcement section; a permeable load-bearing section, formed by pouring permeable concrete above the base reinforcement section, with a drainage channel; a drainage pipe connected to the drainage channel, used for connecting to a drainage system; and an anchor, the lower end of which is connected to the multiple layers of steel mesh, and the upper end passing through the permeable load-bearing section and connecting to the manhole ring, used for installing the manhole cover. This invention provides a construction method for the perimeter structure of road manhole covers, constructing multiple layers of steel mesh, anchors, and drainage pipes in the excavated surface of the roadbed, and forming a composite load-bearing structure through pouring, used for installing the manhole ring and manhole cover. The beneficial effects of this invention are: reducing the risk of manhole ring settlement, increasing the drainage speed of water accumulation around the manhole, and reducing rainwater erosion of the roadbed.

The utility model relates to the technical field of municipal engineering, in particular to a roadbed for municipal road engineering, which adopts the technical scheme that the roadbed comprises an original foundation and a substrate layer, earthwork is excavated on the top surface of the original foundation, the substrate layer is paved on the top surface of the excavated original foundation, and a roadbed layer is paved on the top surface of the substrate layer. A base layer is laid on the top face of the roadbed layer, a surface layer is laid on the top face of the base layer, a plurality of stand columns are arranged and installed on the surface of the original foundation, the lower ends of the stand columns are inserted into the deep position of the original foundation, fixing rods are inserted into the upper ends of the stand columns, and geogrids are fixedly installed between the fixing rods at the upper ends of the stand columns. The roadbed structure has the beneficial effects that the overall tensile strength and shear strength of the roadbed are enhanced through the geogrids which are vertically arranged in each layer of the roadbed, so that the effect of reducing hollowing in the roadbed is achieved, the problems of cracks, cracks or local collapse and the like on the pavement are further avoided, the service life of the pavement is prolonged, and the safety of the pavement is improved.

This application relates to the field of mixing equipment technology and discloses a filler mixing device for treating cracks in the water-stabilized base course of high-fill and deep-cut road sections. The device includes a tank with an opening at the bottom and a telescopic cylinder fixedly connected to the lower surface of the tank. A base plate is fixedly connected to the bottom of the telescopic cylinder. A conveying channel is fixedly and continuously connected to the bottom of the tank, and a discharge pipe is fixedly and continuously connected to the base plate. A telescopic component is provided between the tank and the base plate. A mixing mechanism is installed inside the tank. The telescopic component includes an electric push rod. This invention, by using the telescopic component, base plate, and telescopic cylinder in conjunction, allows the base plate and telescopic cylinder to form a new storage space. When filler material is added into the storage space through the conveying channel, since both the storage space and the conveying channel are located below the mixing mechanism, the addition of filler material will not impact the mixing mechanism, thus avoiding damage to the mixing mechanism.

The utility model belongs to the field of construction sites, and particularly relates to a waterproof roll paving device which comprises a cart, a supporting frame is upwards arranged on the front portion of a bottom frame of the cart, a hopper is arranged on the supporting frame, a discharging opening is formed in the bottom face of the hopper, a rotating rod is arranged at the position of the discharging opening, one end of the rotating rod penetrates through the hopper to be connected with a motor, and the motor is fixed to the bottom frame. A supporting rod is arranged on the bottom frame, a waterproof roll cylinder is sleeved on the supporting rod, and a compression roller is backwards hinged to the tail part of the bottom frame. According to the device, the waterproof roll can be laid while the slurry is sprayed, the construction efficiency is improved, the rotating rod is arranged at the discharging opening of the hopper, uneven discharging is prevented, meanwhile, the slurry is prevented from being accumulated at the discharging opening, the bonding slurry can be evenly sprayed to a base layer, and the construction quality of the waterproof roll is guaranteed.

The utility model relates to the technical field of pavement base course maintenance, and discloses a pavement maintenance device which comprises a water storage tank, a water spraying assembly arranged on one side of the water storage tank, a connecting seat arranged in the middle of the water spraying assembly, and an auxiliary assembly arranged on the connecting seat, wherein a telescopic plate is arranged on the auxiliary assembly, and the telescopic plate is used for adjusting the length of the auxiliary assembly; the water spraying assembly is used for spraying water in the water storage tank to the ground to maintain the ground; the auxiliary assembly is used for driving the water storage tank to move. By means of the water storage tank grip, the problem that the length of the water storage tank grip cannot be adjusted can be solved, free adjustment of the length of the water storage tank grip is achieved, the operation comfort and efficiency are improved, and the use requirements of different workers are met.