34results about How to "Meet the requirements of rapid construction" patented technology

The invention relates to an explosion-proof iron runner castable which comprises the following raw materials in percentage by weight: 55-80 percent of fusion tabular corundum, 10-30 percent of silicon carbide, 1-5 percent of soft clay, 2-5 percent of pure calcium aluminate cement, 1-7 percent of submicron powder, 0.5-1.5 percent of explosion-proof agent and 0.05-0.15 percent of water reducing agent, wherein the explosion-proof agent is a mixture of aluminum powder, aluminum lactate, explosion-proof fiber and boron carbide powder with the weight ratio of 1-2:2.5-4:1-2.5:2-4. The castable of the invention has no cracks after demoulding and drying and no spalling during baking, has the safe explosion-proof temperature of 800 DEG C increased from 500 DEG C, can be subjected to construction under heat state and rapid temperature rise without spalling and can meet the operating requirements of rapid construction of middle and small size blast furnace iron runner. The castable has long service life, can improve the environment of a casting house, greatly reduces the labor intensity of the workers, improves the quality of molten iron and enhances the application safety factor of the iron runner.

The invention relates to a dry ice blasting method and a dry ice blasting device, and belongs to the field of engineering blasting. The dry ice blasting device comprises a spray head, a cylinder body, a tail cover and a one-way valve, wherein the spray head is provided with an exhaust hole; the tail cover is provided with a water inlet hole; a sealing gasket is arranged between the cylinder body and the tail cover; a blasting sheet is arranged between the cylinder body and the spray head; and the tail cover is communicated with the one-way valve through the water inlet hole. The dry ice blasting method comprises the following steps: drilling in a coal bed; assembling the dry ice blasting device, and filling the dry ice blasting device with dry ice and a heating bag; connecting the dry ice blasting device with a water pipe, and placing into a blast hole; and communicating with a water source, and injecting water into the dry ice blasting device, wherein the heating bag inside the cylinder body fast releases heat when encountering water so as to urge the dry ice to be fast sublimated into carbon dioxide gas, when gas pressure exceeds the design pressure of the blasting sheet, the instant blasting of the blasting sheet is caused, and the carbon dioxide gas is fast discharged through the exhaust hole formed in the spray head to form impaction and expansion extrusion on the wall of the blast hole, so that the blasting is realized. The dry ice blasting method and the dry ice blasting device which are disclosed by the invention have the advantages of achieving the bursting at normal temperature, generating no flame or toxic gas and being suitable for a coal mine with gas and coal dust explosion risks.

The invention discloses a segmented support structure and a support method for long and deep foundation pits. The structure includes a plurality of partition supports that divide the foundation pit into several partitions, and a ring brace is fixed in each partition, and the ring The inner edge of the brace is rounded, and the outer edge of the ring brace matches the edge of the partition in which it is placed. It can realize the one-time excavation of super long and super large foundation pits, which greatly speeds up the construction speed, reduces the waste of labor, materials and time, and meets the development requirements of green construction. And it can effectively reduce the number of internal supports, so that the tower can avoid the construction of the supporting structure. When the basement floor is completed, the tower can be constructed, which speeds up the overall construction progress. Different construction sequences will have an important impact on the deformation of the ring brace and the distribution of internal forces, and the poor control of the roundness of the ring brace will affect the safety of the foundation pit project. , effectively controlling the roundness of the ring brace, thereby improving the safety of the foundation pit project.

The invention discloses a quick construction method for an over-crossing business line hangar tunnel T-shaped girder in narrow space. The quick construction method includes the following steps that ahangar tunnel foundation pit is dug according to a designed location and a hangar tunnel stand column is constructed; a hangar tunnel vertical girder is constructed, a bracket support is pre-buried and a gantry crane walking railway is set up on the bracket support; a distributive girder and a form board are laid on the top of the hangar tunnel vertical girder to be used as a T-shaped girder primary prefabricating platform, and a gantry crane is arranged on the gantry crane walking railway; a T-shaped girder is poured on the T-shaped girder primary prefabricating platform and hoisted to a vacant zone; if the vacant zone can not be laid fully, then the step is conducted repeatedly; the T-shaped girder primary prefabricating platform is demolished, and the form board is laid on the T-shapedgirder to be used as a T-shaped girder secondary prefabricating platform; a T-shaped girder is poured on the T-shaped girder secondary prefabricating platform and hoisted to a vacant zone and erectingof the T-shaped girder is completed; the T-shaped girder secondary prefabricating platform is demolished and auxiliary facilities are exerted; and other unnecessary facilities are demolished. The problem of insufficient prefabricating places can be solved and the risk of the hoisting operation near the business line is avoided.

The invention discloses a railway fastener dismantling device and an operating method thereof. The device is used for dismantling a fastener on a railway line, and comprises a support, an electric wrench, a sleeve and electromagnets, wherein handles are arranged on two sides of the upper part of the support, the electric wrench is fixed at the lower part of the support, the sleeve is connected with the lower part of the electric wrench, and the electromagnets are arranged on two sides of the support. A nut on the fastener is loosened by the electric wrench, the whole fastener is sucked up by magnetic poles at the bottoms of the electromagnets, and the fastener is enabled to automatically fall off after the electromagnets are powered off and demagnetized. According to the device and the operating method thereof, not only can the nut be dismantled, but also the whole fastener can be dismantled; not only is the labor cost reduced, but also the operation efficiency is improved at the same time.

The invention relates to the technical field of assembly type concrete tower drum production, in particular to a detachable movable assembly line factory which comprises a movable detachable factory building, a matched full-automatic steel bar machining production line, a split type high-precision mold and a concrete component secondary finish machining center. The movable detachable workshop comprises an incoming material storage area, a reinforcement cage machining area, a reinforcement cage stacking area, a reinforcement cage mold entering area, a concrete distributing area, a mold closingarea, a heating curing area, a mold removal area, a grinding machine machining area, a high-pressure steam curing area and a finished product stacking area. A reinforcing steel bar machining area comprises a top hoisting system, an automatic ring sheet reinforcing steel bar stacking system and a conveying system; the reinforcement cage mold entering area comprises a mold cleaning mechanism and a lifting mechanism; and the mold removal area is provided with an independent cleaning area. The detachable movable assembly line factory provided by the invention has the advantages of being controllable in quality precision, high in component quality, efficient in production, capable of meeting the requirement for rapid construction of a wind field, standardized in component and convenient and rapid to construct, assemble and move.

The invention discloses an external structure suitable for prefabricated assembled pier stud connection and a construction method thereof. The external structure comprises a bearing platform, a pier body and a cover beam which are sequentially arranged from bottom to top; pouring spaces are formed between parts, corresponding to the cover beam and the bearing platform, of the upper end and the lower end of the pier body and are used for pouring concrete, and the cover beam, the pier body and the bearing platform form a fixed whole; the portions, correspondingly connected with the cover beam and the bearing platform, of the upper end and the lower end of the pier body are provided with reinforcing components respectively, and the reinforcing components arranged at the upper end and the lower end of the pier body are both located in the pouring spaces of the corresponding ends of the pier body. The external structure has the technical effects of being stable in structure, reliable in connection, convenient to adjust and capable of being rapidly installed, and can be widely applied to the field of building construction.

The invention relates to the technical field of concrete mixing, in particular to a large-scale concrete mixing engine for irrigation works. The large-scale concrete mixing engine is used for solvingthe problem that in the prior art, the single-tank mixing amount is small. The large-scale concrete mixing engine for the irrigation works comprises a mixing tank, a mixing device and a driving system. Two unloading doors are arranged at the bottom of the mixing tank, and the unloading doors are rotationally connected to the mixing tank. Each unloading door is in transmission connection with a hydraulic driver for driving the unloading door to rotate, and the mixing device is arranged in the mixing tank. The mixing device is in transmission connection with the driving system, and the driving system achieves double-end driving on the mixing device. The large-scale concrete mixing engine has the beneficial effects that the single-tank mixing amount can reach 9,000 L, and the large-scale concrete mixing engine is especially suitable for mixing work of roller compacted concrete for the irrigation works.

The invention discloses underwater concrete, belonging to the technical field of concrete. According to a technical scheme in the invention, the underwater concrete is prepared from the following rawmaterials in parts by weight: 35-45 parts of gravel, 3-10 parts of fine aggregate, 20-25 parts of machine-made sand, 6-20 parts of cement, 0.1-0.6 part of a polycarboxylate superplasticizer, 0.05-0.2part of sodium fluosilicate, 0.01-0.05 part of aluminum fluoride, 0.03-0.1 part of diethanol amine and 0.05-0.1 part of xanthan gum. The invention also provides the preparation method of the underwater concrete. The underwater concrete prepared by using the preparation method has the properties of low loss rate and rapid solidification, and can meet the requirement of rapid construction in seawater.

The invention discloses a method for mounting large-span arch bridge tie bars and relates to the field of bridge engineering construction. The method includes following steps: S1, hanging multiple supports on arch ribs at intervals, arranging at least one supporting frame on each support, arranging multiple spaces for storing the tie bars on the supporting frames, and mounting a winch and a traction rope at two ends of an arch bridge; S2, connecting the front end of one tie bar with the traction rope, and starting the winch to enable the tie bar to sequentially pass all supports from one sideof the arch bridge; S3, allowing the winch to continue working to enable the tie bar to penetrate a pipeline positioned on the other side of the arch bridge, and putting the tie bar on the supportingframes; S4, repeating the steps S2-S3 to put the rest tie bars onto the supporting frames; S5, penetrating two ends of all tie bars into a tensioning device, and utilizing the tensioning device to synchronously tension all tie bars to finish. The method is free of channel occupation, short in construction period and needless of a cable crane for aerial operation.

The invention relates to a corrugated steel web I-shaped composite beam for a steel-concrete superposed bridge deck. The composite beam comprises a steel-concrete composite bridge deck slab, corrugated steel web I-shaped steel beams and transverse linkage beams; the corrugated steel web I-shaped steel beams are arranged in parallel in the longitudinal bridge direction; a plurality of transverse linkage beams are arranged between every two adjacent corrugated steel web I-shaped steel beams and arranged in parallel in the longitudinal bridge direction; and the steel-concrete composite bridge deck slab is located above the corrugated steel web I-shaped steel beams and the transverse linkage beams. The structural form of a steel-concrete combined system is enriched, the number of steel girders, the number of bridge deck slab steel bars and girder detail structures can be effectively optimized, meanwhile, work such as formwork erection in bridge deck slab construction can be omitted through application of the steel-concrete combined bridge deck slab, the construction procedure is greatly simplified, and the rapid construction requirement of the steel-concrete combined structure is met.

The invention relates to the technical field of buildings, and discloses a structure and enclosure combined modular equipment room. The composite board comprises a frame chassis, a folding type house wall surface composite board, a lightweight concrete batten and a door and window composite board, the folding type house wall surface composite board and the door and window composite board are corrosion-resistant, fireproof, heat-insulating, decorative and structural integrated boards, and the bottom of the folding type house wall surface composite board is fixed to the frame chassis. The door and window composite boards are installed on the two sides of the folding type house wall face composite board, and an equipment room is built. The modular equipment room is an integrated system, design, production, transportation, installation and site are considered in an integrated mode, components and materials needed by the site are integrated in a frame chassis through the modular equipment room, expansion and combination work can be conducted on the site, and the site installation process and the site installation technology are simplified.

The invention relates to a cutting type constant-resistance large-deformation anchor rod, and belongs to the field of anchoring support. The cutting type constant-resistance large-deformation anchor rod comprises an anchoring section, a free section and a constant-resistance component, wherein the constant-resistance component is formed by combining a threaded rod, a sleeve and an annular cutter, the tail of the threaded rod is provided with threads and is connected with a rod body of the free section through the sleeve, the tail end of the rod body of the free section is an anchor head with an enlarged diameter, a circle of slurry discharging holes are formed in the outer diameter of the anchor head, the anchor rod body is of a hollow structure and can conduct pressurized grouting, and slurry flows out from the slurry discharge holes at the anchor head. The constant-resistance component cuts the threads on the end of the threaded rod through the annular cutter, continuous constant resistance is provided, and additionally, the rod body moves forwards so as to provide the required large deformation. The cutting type constant-resistance large-deformation anchor rod has the advantages of the simple structure and convenience in construction, joints are in threaded connection, continuous constant resistance can be provided, the required resistance can be controlled by adjusting the shape and distance of the threads, materials of the threads and other conditions, the structure is stable and reliable, and the requirement for on-site rapid construction is met.