70results about How to "Normal construction" patented technology

The present invention discloses an interactive presentation method and system of GIS and BIM augmented reality in tubelane and subway construction. The method comprises: a GIS combines an elevation digital model with a BIM to generate a three-dimensional model, and establishes a terrain three-dimensional model on the elevation digital model, and establishes a tubelane-subway three-dimensional model on the BIM and stores the model into a database server; an imaging apparatus acquires a feature range on media, an AR client calls a terrain three-dimensional model and a tubelane-subway three-dimensional model with corresponding numbers according to the feature range to generate an overall three-dimensional model, and outputs the overall three-dimensional model into the corresponding feature range in a display device for overlapped display; and a sometosensory device acquires a corresponding gesture action of an operator, the AR client calls a terrain three-dimensional model and a tubelane-subway three-dimensional model with corresponding numbers according to the gesture action and outputs the terrain three-dimensional model and the tubelane-subway three-dimensional model into the corresponding feature range in the display device for overlapped display. The method and system disclosed by the present invention realize automatic identification and query of AR, and greatly improve working efficiency and quality.

The invention provides a construction method of a station entrance-exit main body structure close to urban buildings and roads. The construction method specifically includes the steps that a first open-excavated vertical shaft is constructed, an underground-excavated channel is constructed and a second open-excavated vertical shaft is constructed, wherein the first open-excavated vertical shaft and the second open-excavated vertical shaft both are excavated through an upside-down well wall method and the first open-excavated vertical shaft is excavated to the location of the underground-excavated channel, the excavated area of the underground-excavated channel is subjected to deep hole strengthening grouting and is strengthened by erecting a pipe roof bracket, then a CRD construction method is adopted to construct the underground-excavated channel, after the first open-excavated vertical shaft and the underground-excavated channel are constructed, the other open-excavated areas are excavated while the second open-excavated vertical shaft is adopted, and the construction process of the station entrance-exit main body structure is completed.

The invention belongs to the technical field of concrete construction, and particularly relates to a cold region cold weather concrete construction method. The method comprises the following steps of 1, selecting raw materials, and preparing cement, aggregate, water and an additive for use; 2, preparing tools and equipment for construction; 3, according to actual situation, adopting a matching ratio adjusting method, a heat storage and thermal insulation method, an external heating method or an additive mixing method for concrete raw material mixing; 4, constructing the heat preservation environment in the mixed concrete conveying process; 5, performing concrete pouring operation; 6, performing concrete maintenance. The method has the advantages that due to the fact that some characteristics of concrete are changed or poured concrete is subjected to external insulation measures, a traditional technology for spraying chloride on the surface of poured concrete for heat insulation is replaced, normal construction can be kept on the condition that the temperature is quite low, and the construction progress speed is increased on the premise that the quality is ensured.

The invention provides a method for constructing a directly-buried heat-preservation pipeline passing by a marshland section. The method comprises the steps that a marshland is filled with coal gangue so that an operation face can be formed, a groove used for enabling the heat-preservation pipeline to be directly buried is dug in the operation face, pebble replacement and filling are conducted on the part of sludge at the bottom of the groove, and a pebble replacement and filling layer allowing underground water to flow through is formed at the bottom of the groove through replaced and filled pebbles; the water level at the bottom of the groove does not exceed the pebble replacement and filling layer and a medium-coarse sand layer is laid between the pebble replacement and filling layer and the laid pipeline; an anchor block foundation ditch is dug in the groove; after the medium-coarse sand layer is dried, the pipeline is installed in the groove, and butt joint welding is conducted on the pipeline; an anchor block is installed in the anchor block foundation ditch and used for fixing the pipeline placed in the groove; after butt joint welding is accomplished, the groove is backfilled. According to the method, the problems that the pipeline bears force in the sludge, the pipeline cannot effectively operate in a normal life cycle, the pipeline floats when water does not pass by, and the pipeline is long in construction period are solved.

The invention relates to a tri-tube tri-high-pressure jet grouting pile construction method, and belongs to the field of constructional engineering. The tri-tube tri-high-pressure jet grouting pile construction method comprises the following steps: a first step of measuring, paying off and positioning, wherein measurement is performed according to a designed construction drawing, and a construction axis is paid off; a second step of guiding a drilling machine to be in place, wherein the drilling machine is mounted on a designed pile position, and a drill bit of the drilling machine is alignedto the center of the pile position; a third step of drilling, protecting walls and forming holes, wherein the drilling machine is used for drilling holes, and the walls are protected with mud until hole depth achieves designed elevation; a fourth step of separately forming a mud outlet, a water outlet and a gas outlet in the bottom end of a grouting rotary-jetting tube, wherein a pressure value ofair sprayed out by the gas outlet ranges from 1.6 MPa to 2.2 MPa, the water outlet is positioned above the mud outlet and the gas outlet, and the water outlet in the rotary-jetting grouting tube is drilled for washing and reaming while the jetting grouting tube carries out grouting; a fifth step of flushing; and a sixth step of moving the machine. A relatively great gap is formed between the grouting tube and the hole wall, so that pressure in holes is conveniently released, and high water pressure is reduced.

The invention relates to neutral mosaic back gum with high flexibility. The neutral mosaic back gum with high flexibility comprises redispersible emulsion powder, quartz sand, water reducing agents, a defoaming agent, lignocellulose, a mildewproof agent, cellulose ether, bentonite and sodium chloride and is a non-cement-based one-component dry powder product. The neutral mosaic back gum is used for sticking mosaics, can be used for solving the problems of oxidation of mosaics and insufficient bonding force caused by traditional cement bases, also has high flexibility, can be used on lightweight walls and vibrating parts, has the advantages of low possibility of deterioration and easiness in transport and storage compared with non-cement-based pasty or liquid products, can achieve construction under the condition of zero degree and has strong practicability.

The invention discloses a low-temperature environment assembled shear wall construction method, and belongs to the technical field of fabricated building construction. The low-temperature environmentconstruction method comprises the steps of component prefabricating, simulated stress analysis, shear wall installation, laminated plate hoisting for bottom plate prefabricating, window sealing, heating for temperature rise, steel strapping, concrete pouring, communicating cavity treatment, grouting and curing. The low-temperature environment assembled shear wall construction method can solve theproblems that the assembled concrete shear wall cannot be constructed in a low temperature environment and the construction progress is slow.

The present invention belongs to the field of cement technology. The cement of the present invention consists of flyash 50-80 wt%, acid excitant 7-28 wt%, water 1-26 wt% and retardant 1-10 wt%. Or, it consists of flyash after being retarding pre-treated flyash 50-80 wt%, acid excitant 4-30 wt% and water 1-30 wt%. It has the features of fast coagulation, high strength, etc., and may be used widely in fast repair engineering, and building engineering under low temperature environment, etc. The present invention has obvious environment protecting effect.

The invention provides an assembled compound exterior wallboard structure of a building. The structure comprises an assembling board A, triangular clamping holes, an assembling board B, triangular clamping blocks, a plastic board and an outer decorative board. An upper clamping structure and a lower clamping structure are separately arranged at the upper and lower ends of the assembling board A and the assembling board B, connecting clamping boards A are separately connected to two ends of the inner side of the assembling board A, the triangular clamping holes are separately formed in the connecting clamping boards A, two connecting clamping boards B are separately connected to two ends of the inner side of the assembling board B, and two rows of vertically arranged triangular clamping blocks are arranged on the connecting clamping boards B. By changing the clamping positions of the triangular clamping blocks and the triangular clamping holes, the separation distance between the assembling board A and the assembling board B is adjusted, so that the thickness of a poured concrete wall is adjusted. A reinforcement cage insertion frame is added structurally, too, so that each insertedreinforcement cage G is prevented from inclining to deform as concrete is filled and poured, and normal construction is facilitated.

The invention relates to an anti-floating and waterstop construction method for a small-area deep foundation pit of a building. The method comprises the steps that well-point dewatering is carried out on the surrounding of the small-area deep foundation pit; after the underground water level descends to the position 500 mm below a raft, soil of the small-area deep foundation pit is excavated; a concrete anti-floating protective shell is constructed; waterproof coiled materials are laid inside the concrete anti-floating protective shell, and the outer portion of the concrete anti-floating protective shell is refilled with graded sand and stone; the concrete anti-floating protective shell is maintained, and other cushion layers of the foundation pit are constructed; dewatering is stopped, a dewatering well is sealed, and the coiled materials inside the concrete protective shell and coiled materials at other portions are connected into a whole; the concrete anti-floating protective shell bears water pressure independently, and the raft is constructed inside the shell. The method has the advantages that well-point dewatering is directly arranged at an upper mouth of the small-area deep foundation pit, the range of influence of a dewatering pipe is concentrated, and the dewatering effect is good; the concrete anti-floating protective shell bears the water pressure, and the raft is protected and can be normally constructed inside the shell; dewatering is stopped in advance, the waterproof layers are continuously laid inside the anti-floating shell, and the waterproof layers inside the anti-floating protective shell and other waterproof layers of other foundation pits form a complete waterproof system.

The invention discloses a screw-in type line-hanging pile suitable for hard soil construction and a mounting device of the screw-in type line-hanging pile. The screw-in type line-hanging pile comprises a cylindrical shell, a cylindrical coaxial positioning seat arranged in the shell, and a rolling bearing arranged between the shell and the positioning seat; a spiral used for breaking soil and a driving boss used for being matched with the mounting device are arranged on the outer side wall of the shell, an inner ring of the rolling bearing fixedly sleeves the positioning seat in the axial direction, and the mounting device comprises a triangular operating platform, screws, a planetary wheel, a solar wheel sleeve, a triangular planetary frame and a driving motor I; the screws are verticallyfixed to the bottom of the triangular operating platform in the vertical direction, a bearing I is arranged in the middle of the triangular planetary frame, and bearings II are arranged at the threecorners of the triangular planetary frame; and inner rings of the bearings II sleeve the screws, threads matched with the screws are arranged on the inner sides of the inner rings of the bearings II,the inner rings of the bearings II extend downwards to form a driving ring, and an output shaft of the driving motor I conformally penetrates through the bearing I and is coaxially fixed to the top ofthe solar wheel sleeve.

The invention discloses a construction method of a longitudinal moving tied-arch bridge. After an assembled gantry crane lifts arch bridge steel crossbeams and arch rib supports are installed, in thearch rib lifting, longitudinal moving, splicing and butt joint processes, the gantry crane is used for conducting lifting, a heavy object is carried / jacked through a heavy object shifter installed ona longitudinal moving track so as to conduct longitudinal moving splicing installation, jacking sensors acquire the jacking displacement, a longitudinal moving sensor acquires the horizontal displacement, the jacking displacement and the horizontal displacement are fed back to a PLC control unit, and the PLC control unit unitedly controls the heavy object jacking and / or longitudinal moving condition in a coordinating mode. When a conventional cable crane segmental lifting scheme cannot be implemented, through the longitudinal moving track erected in a site, a dragging device, an anti-side-turndevice and a three-dimensional accurate adjustment system, arch ribs and cross braces which are integrally assembled outside the site are integrally and longitudinally moved to the designed position,and bridge construction can be finished guaranteeing both the quality and the quantity.

The invention relates to an automated drainage system for buildings and a construction method and relates to the field of building drainage. By means of the automated drainage system for the buildings, the problem that once electricity is cut off, an existing drainage system cannot work is solved. The automated drainage system for the buildings comprises a drainage ditch arranged on the edge sideposition of the bottom wall of a foundation pit, a water collecting well arranged in the foundation pit and communicating with the drainage ditch, a submerged pump arranged in the water collecting well, a drainage pipe arranged between the submerged pump and the outer side of the foundation pit and an automatic drainage part arranged on the submerged pump. A siphoning drainage well is arranged onthe outer side of the foundation pit. A siphon is arranged between the syphoning drainage well and the water collecting well. A water suction pipe is connected to the end, extending into the water collecting well, of the siphon. A water output pipe is connected to the end, extending into the siphoning drainage well, of the siphon. The water output end of the water output pipe is lower than the water input end of the water suction pipe. A water-discharging pipe is arranged at the bottom end of the siphoning drainage well. According to the automated drainage system for the buildings, under the circumstance of power cut, drainage work can still be conducted in the foundation pit; and in the meantime, time is won for electricity repair, and normal conducting of construction is guaranteed.

The invention relates to a positioning pile trolley system, comprising a hull and a trolley main body. The positioning pile trolley system also comprises a flexible positioning device, hull slotted tracks and sliders. The hull slotted tracks are connected with the hull; a first shaft is fixedly connected to the trolley; a groove matched with the first shaft is formed in the flexible positioning device; the first shaft is axially connected with the flexible positioning device through the groove; a second shaft and a third shaft are fixedly connected to the two sides of the flexible positioning device; the flexible positioning device is connected with the sliders through the second shaft and the third shaft; the sliders are matched with the hull slotted tracks. The positioning pile trolley system has the beneficial effects that the trolley is flexibly connected with the hull, the hull is connected, the trolley is also borne, the positioning pile trolley system has a certain swing inclined angle in the longitudinal swing, thus the force impacted on a positioning pile by a dredger is released, and the positioning pile is not affected by the longitudinal swing of the hull within the longitudinal swing inclined angle of the dredger, and erected in the seabed soil, so that the positioning pile can perform normal construction under greater stormy waves.

The invention discloses a super-long attachment construction method of a tower crane, and relates to the technical field of super high-rise construction. According to the super-long attachment construction method of the tower crane, for the tower crane, basic parameters, related parameters and connection location parameters of an attachment bar and the tower crane during attachment positioning areobtained, the parameters of the attachment bar are optimized, an attachment point of a core tube during construction are determined by utilizing a wind load and attachment basic parameters, meanwhile, attachment operation platforms are separately arranged at the tower crane and an attachment surface operation point, assembly and disassembly and a structure of the operation platforms are optimized, construction of a concrete structure on the core tube is carried out, field splicing and connection of the attachment bar are carried out, construction of an outer frame steel structure is carried out, and arrangement and attachment conversion of a position of a core tube attachment point are performed simultaneously.

The invention provides a pile-foundation steel reinforcement cage anti-floating device and anti-floating method. The pile-foundation steel reinforcement cage anti-floating device comprises a leakage plate used for being connected with a steel reinforcement cage and a grouting hard tube, a slurry outlet of the grouting hard tube is pressed against the leakage plate, and a first leakage hole locatedbelow the slurry outlet is formed in the leakage plate. The steel reinforcement cage is subjected to buoyancy, the leakage plate is fixedly connected to the bottom of the steel reinforcement cage, the steel reinforcement cage and the leakage plate are placed into the pile foundation hole together, the grouting hard tube is pressed against the leakage plate, the leakage plate is subjected to downward pressure from the grouting hard tube, the leakage plate is fixedly connected to the bottom of the steel reinforcement cage so as to applying the downward pulling force to the steel reinforcement cage, the pulling force is used for counteracting the buoyancy, and therefore the steel reinforcement cage can be prevented from floating. The grouting hard tube can also be used for pouring concrete in subsequent engineering, the first leakage hole is formed below the slurry outlet, and therefore the leakage plate cannot influence the flow of the concrete, and normal construction of the construction can be guaranteed. According to the pile-foundation steel reinforcement cage anti-floating device and anti-floating method, the structure is simple, necessary facilities for pile-foundation construction are fully utilized, the cost is low, and the anti-floating effect is good.

The invention discloses an ironing device of a paver. The ironing device comprises at least two segments of ironing plates, wherein an electric heating device is mounted on a base plate of each segment of ironing plate; each electric heating device comprises an electric heating rod and a control box; and each control box comprises a regulating and detecting unit for detecting open circuit, short circuit and electric leakage of the heating device and regulating the voltage of the electric heating rod or cutting off voltage output. Furthermore, the invention also provides the paver. By independently regulating the voltage of the electric heating rod on each segment of ironing plate, the temperature of the ironing plates can be kept same. In addition, the heating of other segments of ironing plates is not affected even the electric heating rod on a certain segment of ironing plate has a fault, and simultaneously the fault is convenient to eliminate.

The invention discloses a construction engineering protection device comprising a pair of support rods. The inner side of each support rod is provided with a fixed plate and a vertical plate located at the upper end of the fixed plate, a pair of fixed plates are connected through a connecting plate, the upper end of the connecting plate is provided with a buffer protection mechanism, and the buffer protection mechanism comprises a moving plate and a plurality of pairs of first buffering components, wherein the moving plate is located above the connecting plate, the two sides of the moving plate are in sliding fit with the corresponding vertical plates, and the multiple pairs of first buffering components are arranged between the connecting plate and the moving plate. In the building construction process, if a construction person accidentally falls from a high construction site, the buffer protection mechanism can protect the construction person, the construction person is prevented from falling to the ground and being injured, the buffer protection mechanism can buffer the gravity of the construction person, and injuries to the construction person are avoided.

The invention discloses a flying dust control device, and belongs to the field of engineering, wherein the flying dust control device comprises a device main body and a flying dust control device; a driving device and a ground dust collecting device are arranged on the outer surface of the lower end of the device main body, and a control box and a laser radar for identifying the surrounding environment are respectively arranged on parts, close to the two ends, of the outer surface of the upper end of the device main body; a flying dust detection assembly is fixedly mounted on a lifting column in the middle of the outer surface of the upper end of the control box; and the flying dust control device comprises a water tank, a spraying device for controlling the flying dust environment in a large range and an atomizing device for controlling the flying dust environment in a small range. According to the flying dust control device, the dust content in air at different construction points can be monitored in real time, the spraying device or the atomizing device is selectively started according to the flying dust range and the dust content, the ground dust collecting device can collect dust on the ground in the movement process of the device main body, the dust is prevented from falling into the air again, and the use effect is better.

The invention relates to a construction method for dredging backward by a cutter suction vessel. When a construction area is greater than the length of a construction vessel body and the dredging depth is greater than the length of a positioning steel pile, the construction area is divided into a plurality of sections of areas for dredging and the dredging length of each section is ensured to be less than the construction safety length of the construction vessel body according to the length of the construction area and the length of the construction vessel body; the positioning steel pile is ensured not to enter a deep water area; the construction area is subjected to a dredging operation by operating an anchor boat, an anchor, a dredge pump, the positioning steel pile, an auxiliary steelpile, a reamer, a winch, a trolley and a bridge frame; and the last section of the construction area is dredged, then the second section from the last is dredged and so on in a similar fashion by performing the operations of calculating, positioning, placing the reamer, transversely moving and dredging, reversing at a side boundary, knocking down the pile, moving the anchor and moving the vessel.The invention provides the construction method for dredging backward by the cutter suction vessel; and a riverway is dredged through the construction method of dredging backward, so that the problem that the construction vessel body cannot be positioned for constructing well in the area with large dredging depth because the steel pile is short is solved.

The invention relates to the technical field of building construction, and discloses a prestressed concrete pipe pile post-grouting device which comprises a grouting device body, a main grouting channel is formed in the grouting device body, the bottom of the main grouting channel is of a three-fork-shaped structure, and first check valves are arranged in forked parts on the two sides of the bottom of the main grouting channel correspondingly; pile bottom grouting channels penetrating through the side walls of the two sides of the grouting device body are further connected to the forked parts on the two sides of the bottom of the main grouting channel, pile side grouting channels arranged in a three-fork-shaped structure are further formed in the grouting device body, and the forked parts on the two sides of the pile side grouting channels penetrate out of the positions, close to the ends of the two sides, of the top face of the grouting device body; the middle bifurcated part of the pile side grouting channel is communicated with the middle bifurcated part of the bottom of the main grouting channel, and a second check valve is further connected into the middle bifurcated part of the pile side grouting channel; the method has the characteristics that the bearing capacity effect of the pipe pile after construction reaches the standard, and construction is simple.

The embodiment of the invention provides a method and a device for measuring the distance between a coal uncovering roadway and a coal seam. The measuring device comprises a seismic source and N sensors which are disposed between the seismic source and the tunneling work surface of the coal uncovering roadway and are in the same line as the seismic source, and the line is parallel to the center axis of the coal uncovering roadway. The distance from the tunneling work surface to the coal seam is acquired by measuring first propagation time when surface waves generated by the seismic source and propagated along the ground plane of the coal uncovering roadway to the tunneling work surface reach the sensors, second propagation time when the sensors receive the surface waves reflected back by the tunneling work surface, third propagation time when transverse waves received by the sensors and reflected back by the coal seam reach the sensors, and the distance between each sensor and the tunneling work surface. By adopting the method and the device provided by the embodiment of the invention, the measurement accuracy and the reliability of measurement results can be improved. As the implementation of the embodiment of the invention is far away from the tunneling work surface of the roadway, normal construction is ensured.

The invention provides an installation structure for an assembly type adjustable partition. The installation structure comprises adjusting bases, a middle keel and partition assemblies. The adjustingbases are arranged at the wall top and the ground symmetrically and comprise bases and base platforms connected with the bases, wherein one base platform is fixedly connected with the wall top, the other base platform is fixedly connected with the ground, and the two bases are arranged oppositely up and down. The middle keel is located between the two adjusting bases and is fixed to a side wall. The partition assemblies comprise partition frames and a plurality of decoration panels arranged in the partition frames. An installation trough is arranged between every two adjacent decoration panelsand is connected with the middle keel in a clamped mode. Pipelines and switch troughs are arranged on the inner sides of the decoration panels. The tops and bottoms of the partition assemblies are connected with the bases in a clamped mode. The two sets of partition assemblies are arranged. Compared with the prior art, the installation structure has the following advantages that a traditional top-ground keel and an installation mode of field partition making can be replaced, a pipeline structure can be reserved, a leveling function can also be achieved, partition installation can be convenient, and later maintenance is convenient.

The invention belongs to the technical field of plate inserting machines, and discloses a novel guide tube device for a plate inserting machine for a drainage strip. The novel guide tube device for the plate inserting machine for the drainage strip is used for solving the problem that an existing drainage strip does not meet the requirement for a designed depth when driven into the ground due to strip returning and strip following. The novel guide tube device for the plate inserting machine for the drainage strip comprises a cylindrical tube body which cooperates with a vibrating hammer of theplate inserting machine, a drainage strip inlet is formed in a side wall of the cylindrical tube body, a sand inlet is formed in the cylindrical tube body and positioned at the lower end of the drainage strip inlet, the sand inlet communicates with an external sand inlet tube, and the lower end of the cylindrical tube body is movably connected with a fixing anchorage device.

The invention relates to a double-piston hydraulic switch and an application thereof in the field of downhole operation tools for oil and gas wells. The double-piston hydraulic switch comprises a pair of pistons, and is arranged on a center pipe (2); a sand jet is arranged on the center pipe (2); the pistons are symmetrically arranged on the external surface of the center pipe (2) along the line of the center pipe; the pistons are fixedly arranged on the center pipe (2) through shear pins; the pistons are used for opening or closing the sand jet. By applying the double-piston hydraulic switch, a fracturing switch is opened under the action of pressure difference between inside and outside working on the pistons and elastic energy stored by springs, and moreover, the continuous turn-on of the switch can be kept; therefore the stability of opening a pipe column during the construction process is improved, and the normal implementation of construction and production is guaranteed; the double-piston hydraulic switch is simple in structure, safe, reliable, applicable for a staged fracturing acidizing treatment technology of a horizontal well, and can also be used for an injection-production technology.

The invention discloses a rainproof and lightning-protection aerial work platform. The rainproof and lightning-protection aerial work platform structurally comprises a base, a telescopic rod and a safety basket; the telescopic rod is mounted at the top of the base; and the safety basket is fixed to the top of the telescopic rod. Due to the fact that building materials flow along with accumulated water to be discharged to a water outlet, the materials are prone to adhering to the water outlet, the diameter of the water outlet is reduced, a pushing mechanism moves in the water outlet, a removing ring removes the building materials on the inner wall of the water outlet, the materials adhering to the water outlet can be reduced, the discharging speed of the accumulated water is increased, the accumulated water accumulated on the surface of a pedal is reduced, workers can normally walk on the pedal, and the workers can normally conduct construction on the outer wall of a building; and due to the fact that the materials are prone to staying on the outer wall of the removing ring, a matching block in a matching plate makes contact with the outer wall of the removing ring, a scraping piece removes the materials on the outer wall of the removing ring, the materials adhering to the outer wall of the removing ring can be reduced, the outer wall of the removing ring can be kept clean and tidy, and the materials adhering to the inner wall of the water outlet are reduced.

The invention provides a pile bottom grouting device which comprises a support, a slurry delivery joint pipe and a detachable grouting tool pipe. The slurry delivery joint pipe is arranged on the upper portion of the support, the grouting tool pipe is arranged on the lower portion of the support, the upper end of the grouting tool pipe is communicated with the lower end of the slurry delivery joint pipe, the upper end of the slurry delivery joint pipe is connected with a slurry delivery pipe, and the lower end of the grouting tool pipe is connected with an inner grouting pipe. Construction and grouting can be facilitated for workers, leakage is not easily caused, and normal construction is ensured.

The invention discloses a device for removing impurities in a granular building material. The device comprises a rectangular supporting base, an L-shape fixed supporting plate is fixedly connected tothe upper surface of the rectangular supporting base, a drawing cleaning mechanism is arranged on the upper end face of the L-shape fixed supporting plate, a rotating cleaning mechanism is arranged onthe upper surface face of the L-shape fixed supporting plate, a moving mechanism is arranged on the lower surface of the rectangular supporting base, and a swinging shielding mechanism is arranged onthe outer side surface of the L-shape fixed supporting plate. The device has the advantages of being convenient to use and capable of effectively removing impurities in the granular building material, guaranteeing normal construction, relieving the labor intensity and guaranteeing the safety of a building using the building material.

The invention relates to the technical field of the construction industry, especially to a special water-based release agent for prefabricated buildings. The special water-based release agent is characterized in that a component released by using the special water-based release agent is non-sticky and easy to release, the surface of a released mold is clean and easy to wash, the mold is not easy to rust, the surface color of a component is uniform, freezing during winter construction is avoided, rain-proofness is realized during outdoor construction, use cost is reduced and practicability is improved. The release agent comprises the following components in percentage by weight: 3-10% of resin, 30-50% of base oil and 16.5-53% of additives, wherein the additives comprise 3%-10% of barium petroleum sulfonate (T701), 3%-7% of fatty alcohol-polyoxyethylene ether (JFC), 2%-5% of triethanolamine, 1%-6% of ethylene glycol, 0.5%-1% of a defoaming agent, 5%-10% of Op-7, 1%-10% of EO-100 and 1%-4% of water.