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A dry-mixed mortar and its preparation method and application
ActiveCN116477905BImprove water retentionGood anti-sag performanceCovering/liningsSolid waste managementCellulosePolymer science
The present invention relates to a dry-mixed mortar and a preparation method and application thereof, belonging to the technical field of premixed mortar. The dry-mixed mortar of the present invention comprises the following components in parts by weight: 200-300 parts of cementitious material, 1-2 parts of cellulose ether A, 0.3-0.8 parts of cellulose ether B, 0.3-0.5 parts of starch ether, and the aggregate is supplemented to a total weight of 1000 parts; the viscosity of the cellulose ether A at 25°C is 30000-40000 mPa·s; the viscosity of the cellulose ether B at 25°C is 100000-120000 mPa·s. The present invention obtains a dry-mixed mortar with good water retention, fluidity, cohesiveness and crack resistance by combining specific slag powder, silica fume, cellulose ether, starch ether, redispersible latex powder and polypropylene fiber with cementitious material and aggregate. The dry-mixed mortar is applied in building decoration, has low requirements on the wetness of the wall, and can overcome the shortcomings of ordinary mortar such as easy slurry bursting and large shrinkage.
Owner:GUANGZHOU PANYU POLYTECHNIC
Method for dewatering combined foundation pit under geological condition of water-containing interlayer
The invention discloses a combined foundation pit dewatering method under the geological condition of a water-containing interlayer, which belongs to the field of building construction and comprises the following steps of: opening a drainage deep well and a decompression deep well, ensuring that a phreatic water level is 1m below an excavation surface, and opening the decompression deep well according to a calculated water head; when the foundation pit is excavated to reach 0.5-1.0 m of a water-containing interlayer, a vacuum drainage deep well is additionally arranged in the longitudinal direction of the foundation pit, and the drainage deep well and the pressure reduction deep well are synchronously operated; every 10 downcast pipes are provided with a vacuum pump to form a downcast section; the downcast pipes are exposed out of the ground by 30-50 cm, each downcast pipe is connected into the water pumping main pipe through a second hose, and the joints are wrapped with plastic films. The vacuum pump is connected with a drain pipe which is connected to a ground drainage ditch; the multiple vacuum drainage deep wells are additionally arranged, the dewatering speed is increased through the pipelines in the vacuum drainage deep wells, meanwhile, the foundation pit excavation time is shortened, and the excavation efficiency is improved.
Owner:NANTONG RAIL TRANSIT GRP CO LTD +2
Communication construction wire laying device
ActiveCN222320962Ufast layingImprove stabilityApparatus for laying cablesStructural engineeringControl theory
Owner:ANHUI SHENGDATONG INFORMATION TECHNOLOGY CO LTD
Photovoltaic assembly type integrated sewage treatment bathroom multifunctional equipment
ActiveCN222576268UHEPA filterprevent escapePhotovoltaic supportsSolar heating energyGratingElectric machinery
The utility model discloses photovoltaic assembly type integrated sewage treatment bathroom multifunctional equipment which comprises a room body, a bathroom and a sewage treatment mechanism are arranged in the room body, the sewage treatment mechanism comprises a sundry removal box, an anaerobic filter bed groove, a carrier flowing groove, a precipitation groove and a disinfection groove, a water inlet hole is formed in the sundry removal box, and a water outlet hole is formed in the disinfection groove. The bathroom is communicated with the water inlet hole through a pipeline, the sundry removing box is provided with a water inlet grating and a sliding column, the sliding column is provided with a scraping plate in a sliding mode, the sundry removing box is rotationally provided with a threaded column, the threaded column is in threaded connection with the scraping plate, the sundry removing box is provided with a driving motor, and the output end of the driving motor is connected with the threaded column; compared with the prior art, the waste gas treatment device has the advantages that the waste gas treatment device is high in treatment efficiency, construction time consumption is reduced, odor dissipation is avoided, and inconvenience and trouble brought to people are avoided.
Owner:BEIJING XINAORUIZHI TECH DEV CO LTD
An angle adjustment device for steel pipes in tunnel pipe roof construction
ActiveCN224282660UEasy to adjustImprove fixation stabilityMining devicesUnderground chambersSupporting systemBrake
This utility model discloses a steel pipe angle adjustment device for tunnel pipe roof construction, comprising a leveled ground, a tunnel pre-reinforcement zone, a steel pipe, a tunnel face, a steel pipe installation port, and an angle adjustment system foundation, a support system, and an adjustment system. The foundation includes fixing screws, washers, and nuts, with the support system connected to the top. The support system consists of an arc-shaped steel pipe and a transverse plate, which is movably embedded in a brake block. The adjustment system includes a fixing plate, a transverse movable shaft, etc., and the brake block has a fixing groove, etc. Precise adjustment and fixing of the steel pipe angle can be achieved through an angle scale, adapting to different steel pipes, facilitating installation and maintenance, improving construction accuracy and efficiency, reducing safety hazards, and is suitable for tunnel pipe roof construction.
Owner:LIAONING INST OF SCI & TECH
Suspended pouring rotation-pushing-folding multi-time system switching control system and method
PendingCN119575846AConstruction time is shortBridge erection/assemblyProgramme control in sequence/logic controllersControl systemStructural engineering
The invention discloses a control system and method for switching of a suspended pouring rotation-pushing-closing multi-time system, and relates to the technical field of bridge construction. The detection module is used for building a pouring bracket, pre-burying a base and a sensor module, arranging a total station and the rotating module at a closure section, acquiring displacement data by utilizing the sensor module, acquiring an eccentric distance according to the displacement data, and carrying out counterweight; the pouring pushing module is used for calculating a pouring prediction position, pouring concrete to a corresponding position by traction equipment, judging side pressure and pouring height, stopping pouring when the pouring height reaches a preset value, and controlling sliding driving equipment to move the steel beam after cooling; and the folding module is used for folding after the steel beams reach preset positions, judging whether folding axes deviate or not, if not, welding gaps between the steel beams, and if yes, adjusting the positions of the steel beams. According to the invention, the construction time can be reduced.
Owner:CHINA RAILWAY FIRST GROUP CO LTD +2
Sheep house ground film type sheep manure dry-wet separation facility and sheep house
This utility model provides a sheep manure dry-wet separation facility with a film-covered floor in sheep sheds for cold northern regions, and a sheep shed itself, relating to the field of sheep farming technology. The sheep manure dry-wet separation facility with a film-covered floor in sheep sheds for cold northern regions provided by this utility model includes a feeding room and walking passages distributed on both sides of the feeding room. A drainage ditch is opened at the bottom of the feeding room; an installation frame is set in the feeding room and above the drainage ditch, with a slit pad layer on the installation frame, and a conveyor belt with permeable holes is set below the installation frame; the bottom of the drainage ditch is covered with a sand layer and a waterproof layer from bottom to top; a manure discharge channel is opened at one end of the drainage ditch, located below the end of the conveyor belt; and a urine discharge pipe is set at the other end of the drainage ditch, communicating with the drainage ditch. The sheep shed provided by this utility model includes the above-mentioned sheep manure dry-wet separation facility with a film-covered floor in sheep sheds for cold northern regions. This utility model can improve the problem of high costs currently faced in sheep sheds.
Owner:JILIN ACAD OF AGRI SCI +1