180results about How to "Meet construction requirements" patented technology

The invention relates to the technical field of engineering digitization, in particular to a tunnel secondary lining material distribution system based on a neural network, which generates a height difference matrix by acquiring concrete height data of different point positions in a material distribution process in real time. A plurality of image capturing devices are configured to acquire concrete lining state images in real time. After being preprocessed and marked, the images are input into a convolutional neural network for training and processing so as to judge the characterization state of the concrete, including the surface bubbling degree, the flooding degree and the defect position. And selecting a material distribution operation window according to the height difference, controlling the automatic material distribution machine to perform material distribution operation, generating a concrete characterization state based on a convolutional neural network, obtaining a continuous state set, performing reinforcement learning in combination with the height difference and vibration working parameters, and controlling vibration equipment to work. And the concrete lining stopping duration is recorded, and abnormity warning is carried out. According to the system, intelligent analysis and optimal control over the concrete state are achieved, the material distribution uniformity and compactness are ensured, and the construction efficiency and quality are improved.

The invention discloses a box girder steel strand pulling trolley and a pulling method thereof. The trolley comprises a moving trolley, two sets of U-shaped channel steel columns, lifting mechanisms arranged on the U-shaped channel steel columns, a lifting frame arranged in the two sets of U-shaped channel steel columns and a pulling mechanism arranged on the lifting frame. The strand pulling mechanism comprises two chain transmission strand pulling mechanisms arranged in the lifting frame, auxiliary strand pulling mechanisms and limiting supporting pieces located at the front ends of the chain transmission strand pulling mechanisms, and a transverse adjusting mechanism driving the two chain transmission strand pulling mechanisms to move or open and close. The U-shaped channel steel column drives the lifting frame and the strand penetrating mechanism to ascend and descend in the height direction of the U-shaped channel steel column through the lifting chain. A feeding mechanism is arranged on the moving trolley; the method comprises the following steps: 1, moving the box girder steel strand pulling trolley; 2, feeding of a box girder steel strand; 3, adjusting a strand pulling mechanism; and fourthly, the box girder steel strand is arranged in a penetrating mode. The box girder steel strand pulling device can rapidly complete box girder steel strand pulling of a box girder, and the construction efficiency is improved.

The invention discloses a high-temperature-resistant cleaning type spacer fluid, and relates to the technical field of oilfield development and drilling, and the spacer fluid comprises the following components in parts by weight: 0.2-3 parts of a mixture of xanthan gum and modified diquat, 2-15 parts of an efficient cleaning agent, 0.5-5 parts of an anti-pollution agent, 0.2-3 parts of a dispersant, 0.1-0.5 part of a defoaming agent, 0.5-5 parts of ultrafine powder, 30-80 parts of a weighting agent and 25-90 parts of water. The spacer fluid has good compatibility with cement paste and drilling fluid, can keep stable performance at a high temperature of 220 DEG C, and has a good flushing effect.

The invention provides a crawler for a square pier column of a bridge. The crawler comprises an upper hoop and a lower hoop, the upper hoop and the lower hoop are square hoops; a driving device for driving the upper hoop and the lower hoop to move up and down is connected between the upper hoop and the lower hoop; the upper hoop is provided with a platform for bearing a load; the upper hoop and the lower hoop are each provided with a hoop locking device. The hoop locking device can correspondingly lock or loosen the upper hoop or the lower hoop. The bridge square pier stud crawler can adapt to cross section sizes of different square pier studs, and is compact in structure, safe, reliable and convenient to disassemble and assemble.

The invention belongs to the technical field of tunnel construction, and relates to a construction method for crack resistance of plateau tunnel lining concrete, which comprises the following steps: S1, screening of concrete raw materials: screening all raw materials according to the requirements of crack resistance of plateau tunnel lining concrete and the following requirements; s2, according to the anti-cracking performance requirement of the plateau tunnel lining concrete, the raw materials screened in the step S1 are adopted, and anti-cracking concrete is formed according to the set mixing proportion; s3, preparation before concrete pouring; s4, the concrete is put into a mold, poured and vibrated; and S5, concrete curing. According to the method, the concrete mixing proportion is designed, the concrete is poured in a mold, and the vibration and curing temperature and humidity in the concrete pouring process are controlled, so that the concrete shrinkage rate is reduced, and the anti-cracking performance of the concrete is improved.

The utility model relates to the technical field of building construction, in particular to a grout stopping device for adjusting opposite-pull pull rods of an anti-collision guardrail formwork and a formwork segment, and the grout stopping device is characterized in that an oblong hole is formed in the position of an original pull rod hole in the root of the anti-collision guardrail formwork; the grout stopping device comprises two sliding groove strips which are vertically arranged in a spaced mode, the two sliding groove strips are arranged on the outer sides of the long round holes, two grout stopping plates are arranged between the two sliding groove strips in a sliding mode, the opposite ends of the two grout stopping plates are each provided with a semicircular hole, and an opposite-pull spring is arranged between the opposite ends of the two grout stopping plates. And the opposite ends of the two grout stopping plates are only exposed out of round holes for the opposite pull rods to pass through under the action of the opposite pull springs. According to the grout stopping device and the formwork segment, the technical problem that the opposite-pulling pull rod interferes with the embedded steel bars can be solved.

The invention relates to the technical field of refractory materials, in particular to a preparation method of a self-curing tundish dry material, which comprises the following steps of: mixing, forming, drying, sintering, cooling and grinding raw materials of the tundish dry material, and mixing the obtained tundish dry material bulk material and a gel material according to a preset proportion; the tundish mold is filled with the fireproof bulk materials obtained through mixing, layered filling is adopted, vibration and degassing treatment are conducted on each layer of fireproof bulk materials to obtain a degassed fireproof solid material, curing treatment is conducted on the degassed fireproof solid material to obtain a cured fireproof layer, and the curing strength of the cured fireproof layer is detected to obtain the actual curing strength; and for the condition that the actual curing strength cannot meet the standard curing strength requirement, the standard curing strength requirement is met by adjusting vibration parameters or adjusting grinding power. By adjusting the grinding power and the vibration parameters, the curing strength of the self-curing tundish dry material meets the curing requirement.

The present invention relates to a method for recycling waste pavement asphalt, and specifically provides a method for recycling waste pavement asphalt without a regeneration agent. The recycling method uses crushed pavement asphalt milling material, new asphalt, new aggregate, and fiber that have been crushed and screened multiple times, controls the temperature of each reaction process and the way in which the new asphalt is introduced, realizes the use of a large amount of recycled asphalt pavement materials, and does not use a regeneration agent, effectively realizes the reuse of waste asphalt, reduces the cost of road maintenance or paving, and has high economic and environmental benefits.

The invention discloses an alkali-free chloride-free powdery master batch soluble accelerator as well as a preparation method and a use method thereof, and belongs to the technical field of building material admixtures. According to the invention, sulfate and a fluorine-aluminum compound are used as base materials, and the water-based cutting fluid specifically comprises 45-60 wt.% of the base materials, 5-10 wt.% of a stabilizer, 3-5 wt.% of polycarboxylic acid, 5-10 wt.% of lignosulfonate, 1-1.5 wt.% of a pH regulator, 5-8 wt.% of an antifoaming agent, 10-12 wt.% of calcium formate and the balance of water. The preparation method comprises the following steps: pretreating the base material, dissolving and mixing, feeding, adjusting the pH value, decolorizing, concentrating and drying. The prepared accelerator has an efficient coagulation accelerating effect, good crack resistance and impermeability, is environmentally friendly and efficient, and can be widely applied to various cement-based materials; the liquid setting accelerator can be prepared by adding water to dissolve the powdery master batch, and is applied to tunnel spraying construction, so that a powerful guarantee is provided for the safety and stability of a tunnel.

The invention discloses a reinforcing steel bar sleeve grouting material for a high-strength micro-expansion fabricated concrete structure. The reinforcing steel bar sleeve grouting material is prepared from the following raw materials in parts by weight: 735 to 795 parts of cement, 15 to 85 parts of silica fume, 80 to 90 parts of lithium slag powder, 9 to 36 parts of magnesium slag powder, 500 to 800 parts of quartz sand, 100 to 400 parts of basalt sand, 9 to 12.6 parts of a water reducing agent, 0.9 to 4.5 parts of a retarder, 0.9 to 4.5 parts of a reinforcing agent, 0.6 to 1.2 parts of a de-foaming agent, 0.6 to 1.2 parts of a suspension stabilizer, 0.1 to 0.3 part of a plastic expanding agent and 45 to 72 parts of a UEA expanding agent. The grouting material disclosed by the invention has the advantages of high strength, micro-expansion, good fluidity, no bleeding, no segregation and the like, and meets the use requirements of an assembled concrete structure.

The present invention discloses a method for precise docking of shields of ultra-large diameter submarine tunnels in a complex coupling environment, including measurement adjustment control, docking construction position determination, docking reinforcement steps, shield disassembly and internal lining construction steps during the excavation of two shield machines in opposite directions. The present invention is based on setting a pre-test lateral penetration error model outside the tunnel and a post-test lateral penetration error model inside the tunnel, and calculates and verifies the pre-test lateral penetration error outside the tunnel and the post-test lateral penetration error inside the tunnel to accurately control the measurement adjustment. In addition, during the excavation and docking process of the two shield machines, the strata at the docking position, the shield machine and the shield tail segment are reinforced multiple times to achieve docking in a highly permeable submarine environment, wherein the advanced reinforcement sealing device is used in the advanced grouting reinforcement to prevent the high permeability of the seabed from causing mud and water on the outside of the shield body to gush into the shield body during drilling and grouting, thereby further improving the stability of the submarine docking.

The invention discloses self-compacting concrete and a preparation method thereof, and relates to the technical field of concrete, and the concrete comprises cement, fly ash, mineral powder, water, sand, stone and a modified water reducer. The modified water reducing agent is a polymer prepared from a hydroxyl-containing monomer I, a double-bond-containing acyl chloride monomer II, an unsaturated polyether monomer III and a double-bond-containing monomer IV in a mass ratio of (0.5-1.5): 1: (9-12): 1 through esterification reaction and double-bond addition polymerization, and hydroxyl, carboxyl and a polyether side chain are introduced into a molecular chain of the polymer at the same time. According to the water reducer, through the synergistic effect of hydrogen bond stable adsorption, steric hindrance and electrostatic repulsion, the compressive strength of concrete is improved, the slump is reduced, the balance of super-long retarding and high-strength development is achieved, and the comprehensive performance is excellent.

This invention discloses a method for maintaining a temporary access road when an elevated trestle bridge passes under an existing railway frame bridge. The existing railway frame bridge is a double-span drainage culvert. The method includes: constructing a traffic culvert on one side of the double-span drainage culvert, while retaining the other side as a drainage culvert; constructing a temporary steel bridge within the traffic culvert to form a construction passage across the bottom slab of the existing frame culvert; connecting the temporary steel bridge with the passages on both sides of the double-span drainage culvert to form a temporary access road; maintaining clearance between the temporary steel bridge and the bottom of the traffic culvert; and spacing between the temporary steel bridge and the two sides of the traffic culvert; the temporary steel bridge is a single-lane bridge with height and width restrictions. This invention enables low-clearance crossing while ensuring smooth drainage during the flood season.

This invention belongs to the field of industrial solid waste resource utilization technology, and relates to a circulating fluidized bed ash-based cementitious material for road base courses and its preparation method. The raw materials for the road base course cementitious material are composed of the following mass parts: 29-43 parts of circulating fluidized bed ash, 16-27 parts of ground blast furnace slag, 3-6 parts of silica fume, 7-15 parts of P.O42.5 silicate cement, 0.1-0.4 parts of activator, and 27-30 parts of water. The circulating fluidized bed ash is prepared by mixing circulating fluidized bed fly ash and slag in a mass ratio of (2-5):(5-10). This invention effectively alleviates the problems of fast setting time and shrinkage cracking of traditional road base course cementitious materials by utilizing the characteristics of micro-expansion and long hydration time of circulating fluidized bed ash. The advantage of this invention is that it promotes the large-scale utilization of circulating fluidized bed ash and contributes to carbon emission reduction in the road sector.

The cross-shaped pipe pulling device comprises a hydraulic device and a pipe pulling frame, the hydraulic device is used for providing pulling force, the pipe pulling frame is provided with four through holes or opening grooves used for detachably and fixedly installing a mold, and the center connecting lines of every two opposite through holes or opening grooves are distributed in a cross shape. By means of the distributed cross-shaped mold layout, compared with an existing barrel-shaped steel mold, the self weight of a single mold and the bonding force between the single mold and initial set concrete are obviously reduced, the needed pulling force is obviously reduced, and a smaller hydraulic device can be adopted for pulling; the probability that the mold cannot be pulled out or even is damaged due to the fact that the adhesive force between the mold and the node pile initial set concrete is too large in the pulling-out process is greatly reduced.

The utility model discloses a municipal road asphalt concrete pavement construction device, which belongs to the related technical field of concrete pavement construction and comprises a handheld rod, an adjusting rod is inserted into the inner side of the handheld rod in a sliding manner, a connecting plate is fixedly connected to the front end of the handheld rod, and a handle a is fixedly connected to one end, far away from the connecting plate, of the adjusting rod. A hand screw a is movably inserted in the position, away from the connecting plate, of the handheld rod, and a plurality of screw holes a matched with the hand screw a are formed in the outer wall of the adjusting rod. When the municipal road asphalt concrete pavement construction device is used, firstly, the length of the handheld rod can be adjusted according to the width of an asphalt concrete pavement, a hand screw a can be loosened, so that the hand screw a is separated from a corresponding screw hole a, and the adjusting rod can be pulled to extend and adjust through the handle a; and meanwhile, the spline shaft is driven to carry out extension adjustment on the inner side of the spline sleeve, and after adjustment is completed, the hand screw a can be locked.

The invention discloses a pipeline supporting frame with the height convenient to adjust and a construction method thereof. The pipeline supporting frame comprises at least two length-adjustable hanging rod assemblies, the upper end of one hanging rod assembly is fixedly arranged on a base, a vertical sliding groove is formed in the upper end of the other hanging rod assembly, a first sliding block is arranged in the vertical sliding groove in a sliding mode, and the first sliding block is hinged to the other base; the lower ends of the at least two suspender assemblies are hinged to the base, a horizontal sliding groove is formed in the base, and two second sliding blocks are arranged in the horizontal sliding groove in a sliding mode; the two locking rod assemblies are arranged oppositely, the two opposite ends of the two locking rod assemblies extend oppositely to form limiting plates, the limiting plates at the upper ends of the two locking rod assemblies are connected to the two second sliding blocks correspondingly, and the limiting plates at the lower ends of the two locking rod assemblies form a sliding seat; the two sliding seats are provided with driving rods used for driving the two sliding seats to get close to each other or get away from each other. The pipeline supporting frame solves the problem that when an existing pipeline supporting frame is used for installing a pipeline, the setting height of the pipeline is tedious to adjust.

The invention discloses a comprehensive maintenance method and system for construction of a composite wall of a comprehensive hub station through a cover-excavation top-down method, and relates to the technical field of rail traffic engineering construction. The technical problems of low maintenance efficiency, unbalanced temperature and humidity control, easiness in cracking and leakage and the like of the laminated wall under the working condition of top-down excavation are solved; the comprehensive system comprises mold curing, intelligent temperature and humidity control, cooling temperature control, heat preservation and moisture preservation and monitoring early warning, automation, refinement and traceability of the curing process are achieved, the moisture preservation and heat preservation period of the laminated wall is prolonged, the internal and external temperature difference is strictly controlled to be smaller than or equal to 25 DEG C, the concrete surface moisture content is controlled to be larger than or equal to 80%, and the impervious concrete curing period is controlled to be larger than or equal to 14 d. According to the construction method, the integrity and the anti-cracking and anti-seepage performance of the wall body are remarkably improved, the construction requirements of the large cover-excavation top-down composite wall are met, the construction convenience and the maintenance quality reliability can be effectively improved, and remarkable economic and social benefits are achieved.

The invention provides a container string type inversion and boost all-in-one machine, which belongs to the technical field of box-type substations and comprises a 40-chi standard container body, and the interior of the 40-chi standard container body is divided into an inversion module area, a boost module area and a medium-voltage chamber through fireproof and explosion-proof partition walls; the inversion unit is arranged in the inversion module area, the inversion unit is a string PCS module, and the input end of the inversion unit is used for being connected with an external energy storage battery cabin; and the boosting unit is arranged in the boosting module area, the boosting unit is an oil-immersed transformer, and the input end of the boosting unit is electrically connected with the alternating current output end of the inversion unit through a confluence busbar in a metal connection bridge. The inversion unit, the boosting unit, the grid-connected unit, the intelligent control module and the auxiliary system are highly integrated in the standard container body, and safe isolation is realized through the fireproof and explosion-proof partition wall, so that the requirements of standardized transportation and rapid deployment are met, and the high efficiency, reliability and safety of system operation are ensured.

The invention discloses a 240h ultra-slow-setting dry-mixed wet spraying material and a preparation method for underground engineering, comprising the following components: by weight, 100-105 parts of silicate cement, 280-285 parts of pre-screening soil and stone waste, 25-30 parts of fly ash, 4-6 parts of quick-setting agent, 40-50 parts of mixing water, based on the mass of PO 42.5 R silicate cement, and also comprising 4% to 5% of compound retarder. The unique slow-setting component of the present invention prolongs the transportation time of shotcrete, so that the material does not need to be piled up underground, and the situation of random stacking and cement failure of the material is avoided. The pre-screening soil and stone waste and fly ash in the material of the present invention are both solid waste-based materials. The two are used as the main components of shotcrete, which alleviates the supply pressure of natural sand and gravel, machine-made sand and gravel and cement, turns waste into treasure, and improves resource utilization.

The invention discloses a laser scanning device for asphalt paving construction and a construction method in a tunnel, and belongs to the technical field of tunnel engineering. The laser scanning device for asphalt paving construction comprises a box body and an adjusting column, the adjusting column is located in the box body, a sleeve is arranged outside the adjusting column, a moving block is arranged outside the sleeve, and a mounting plate is arranged on one side of the box body; a display panel, a laser control panel, a bubble level and a foot margin control panel are arranged on the side face of the mounting plate. In order to solve the problems that the space in a tunnel is narrow, the asphalt paving operation efficiency is low, and the engineering quality is difficult to guarantee, an original paver is refitted, so that the paver can adapt to the narrow space of the tunnel, then a box body is arranged on a construction road section, and the box body emits laser parallel to a construction surface outwards; and finally, personnel control the modified paver to carry out asphalt paving operation along the laser, so that the accuracy of construction operation is guaranteed.

The utility model discloses a trench excavation control device, which relates to the technical field of construction and comprises a mounting frame and a rotating shaft, and a trench excavation fluted disc is sleeved on the outer side of the rotating shaft; a shell is arranged at one end of the rotating shaft and located on the side edge of the mounting frame, a driving mechanism is arranged in the shell, and an excavation width control mechanism is arranged at the other end of the rotating shaft. A plurality of connecting plates are arranged on the side wall of the mounting frame, and mounting holes are formed in the connecting plates; a reinforcing plate is arranged at the top of the mounting frame, and a supporting plate is arranged on one side of the reinforcing plate; the excavation width control mechanism comprises a shaft sleeve and a shaft shoulder which are arranged at the other end of the rotating shaft, and a connecting groove matched with the shaft shoulder is formed in the shaft sleeve; a telescopic cylinder is arranged at the top end of the supporting plate, a square plate is arranged on an output shaft of the telescopic cylinder, and the bottom of the square plate is connected with the shaft sleeve. According to the utility model, the excavation width of the groove can be controlled, the damage to the environment is reduced, and the resource consumption is reduced, so that the construction requirements of green buildings are better met.

The invention relates to the technical field of differential settlement area elevation control, in particular to a differential settlement area elevation control network measurement method, which comprises the following steps: re-measuring a known line elevation control network, calculating a control point measurement section height difference, and updating elevation data after secondary re-measurement confirmation is needed when a standard tolerance is exceeded; determining a differential settlement area, and burying two groups of area control points on two sides of the differential settlement area; and continuously measuring and calculating the regional control point elevation as a settlement area control point detection constraint point, periodically detecting the height difference condition of the control point measurement section in the settlement area, and updating the elevation data when the standard tolerance is exceeded. The area elevation control point with stable settlement is selected as the settlement area control point detection constraint point, so that the problem of settlement of the constraint point is avoided, the accuracy of the elevation result is ensured, the measurement distance is shortened, the measurement data processing is simple, the measurement time is saved, and the change of the control point in the settlement area can be detected; elevation updating can be carried out in time when the standard tolerance is exceeded, so that the construction requirements are met.

The invention relates to the technical field of rock tunneling, and provides a full-section rock tunneling robot and an operation method thereof. Comprising a walking mechanism, an up-down moving system, a left-right moving system, a rock drilling and breaking system and the like. The walking mechanism comprises a crawler belt, driving wheels and hydraulic telescopic supporting legs. The rotating platform mechanism is installed on the walking mechanism, and the full-section operation mechanism is movably installed on the rotating platform mechanism. The up-down moving system is used for realizing lifting of the rock drilling and breaking system; the left-right moving system is used for realizing left-right movement of the rock drilling and breaking system; the rock drilling and breaking system comprises a mechanical long arm, a mechanical short arm and rock breaking equipment; the rock breaking equipment is integrated with the identification system, communicates with the control system through a wireless signal, and carries out tensile shear rock breaking by utilizing rock properties; the control system integrates a rock breaking position automation module, a communication module and a guide rail position adjusting module. According to the invention, the robot can carry out all-directional, dead-corner-free and interference-free full-section continuous tunneling in a roadway with a section in any shape.

The utility model provides an assembly type steel back ridge system for an aluminum template, which comprises an external corner back ridge mechanism and an internal corner back ridge mechanism which are oppositely arranged and connected through a split bolt, and each of the external corner back ridge mechanism and the internal corner back ridge mechanism comprises a plurality of straight back ridges and a standard connecting piece for connecting two collinear straight back ridges; the external corner back ridge mechanism further comprises a plurality of external corner connecting pieces which are used for connecting two intersecting straight back ridges on the outer side of the wall body. The internal corner back ridge mechanism further comprises a plurality of internal corner connecting pieces which are used for connecting two crossed straight back ridges on the inner side of the wall body. According to the assembly type steel back arris system for the aluminum formwork, the problems that in the prior art, a back arris system is low in standardization degree, and the length cannot be flexibly adjusted are solved.

The utility model discloses a pile sinking device and an offshore piling robot, comprising: a pile sinking mechanical arm having a mounting end and a free end, the mounting end of the pile sinking mechanical arm being fixed on a work platform; the vibration exciter is hinged to the free end of the pile sinking mechanical arm through a first hinge shaft which is horizontally arranged; wherein the vibration exciter can grab a pipe pile to be constructed through a pile clamping structure of the vibration exciter, and the vibration exciter is vertically hung at the free end of the pile sinking mechanical arm under the gravity action of the vibration exciter and the pipe pile. The pile sinking mechanical arm is used for changing the posture of the pile sinking mechanical arm to drive the vibration exciter to move, so that the vibration exciter grabs a pipe pile and moves the pipe pile to the position over a preset pile position, and it is ensured that the vibration exciter can vibrate up and down to vertically drive the pipe pile into the preset pile position; and meanwhile, if the perpendicularity of the pipe pile deviates due to the unstable offshore operation environment in the piling process, the pile sinking mechanical arm can be used for adjusting the position of the vibration exciter to adjust the perpendicularity of the pipe pile, so that the perpendicularity of the pipe pile meets the construction requirement.

The utility model relates to an intelligent mini vibrating and leveling machine, and belongs to the technical field of road and bridge construction equipment. Comprising a walking base with walking wheels, a lifting mechanism installed on the walking base, a vibrating mechanism driven by the lifting mechanism to ascend and descend and a paving and leveling mechanism. The vibrating mechanism is a vibrating material distribution push plate driven by a vibrating motor; and the paving and leveling mechanism is a roll shaft driven by a motor to rotate. The utility model relates to a small-sized vibrating and leveling machine, which can solve the problem of construction scenes under narrow working conditions through compact structural design. The equipment is small and exquisite in design and suitable for construction scenes of narrow working conditions such as the middle of a high-speed rail, has the functions of vibrating, distributing, paving and leveling, and can effectively improve the construction efficiency and quality.

The present invention discloses a vehicle body roof installation positioning control method, device, controller and medium, the method comprising: moving the vehicle body to a specified position and limiting the freedom of the vehicle body in a spatial coordinate system; moving the roof to a theoretical installation position and limiting the freedom of the roof in a spatial coordinate system; obtaining the deviation of the vehicle body between the specified position and the target position of the vehicle body; calculating the actual installation position of the roof according to the theoretical installation position and the deviation of the vehicle body; moving the roof to the actual installation position and placing the roof vertically downward on the vehicle body. The vehicle body roof installation positioning control method of the present invention has the characteristics of high flexibility, automation and saving process area while ensuring that the vehicle body roof assembly process can meet the trend of large-size roof design.

The invention relates to a household multifunctional water-based strippable antiviral coating composition and a preparation method and application thereof, and belongs to the technical field of decorative coatings, and the household multifunctional water-based strippable antiviral coating composition is prepared by adopting acrylic acid strippable resin and adding other raw materials such as a nano antibacterial material. The household multifunctional water-based strippable antiviral coating composition disclosed by the invention is suitable for protecting base material surfaces which are frequently contacted with household, hospital facilities, public facilities and stone surfaces, and solves the technical problem that a strippable coating also has strippability on rough surfaces (such as wall surfaces, stone, wood and other base materials with mineral ions); the product also has the characteristics of efficient anti-virus function, excellent peelability, excellent protective property, greenness, safety and the like, and can meet the individual multi-aspect requirements of consumers.

The utility model relates to the technical field of infrastructure construction auxiliary tools, in particular to a hoop for different pile diameters. Comprising an arc plate and a fastening bolt arranged at the end of the arc plate, and the arc plate comprises an arc plate section formed by connecting a plurality of arc plate chain links in series and connecting plates symmetrically arranged at the two ends of the arc plate section. The PHC pipe pile hoop can be suitable for various PHC pipe piles with different pile diameters, is good in universality, high in utilization rate, convenient to install and good in functionality, and is beneficial to saving construction cost, improving enterprise economic benefits and shortening the construction period; and the construction requirements of the cast-in-place cross beam can be met.