1165results about How to "Improve construction quality" patented technology

A method for constructing pipe piles while drilling for building or bridge foundations. The construction steps are to cover high-strength prestressed concrete pipes or steel pipes with drill pipes on the ground first, and install impactors and reaming retractable drill bits at the front ends of the drill pipes. , Follow the pipe while drilling, follow the pipe retaining wall, drill to the design elevation, stop drilling, withdraw from the reaming to shrink the drill bit, use the mud pump to clean the mud and sediment, pour concrete into the pipe, and simultaneously inject pressure grout to the outside of the pipe wall , stop when concrete and grout reach the ground; the object of the invention is to propose a construction method with fast construction speed, reliable quality, less material consumption, high bearing capacity of piles, mechanized operation, and environmental protection. In the construction method of bored cast-in-place piles, the use of mud retaining walls pollutes the environment, the hole is easy to collapse during the drilling process, the quality of concrete pouring is unstable, and the prestressed pipe piles are easy to cause the soil to rise. The strength of the pile body constructed by the invention is high. , There is no sediment at the bottom of the pile, and the pile end is completely rock-socketed, which can reach more than 2 times the bearing capacity of the same diameter bored pile.

The invention discloses an energy-saving shield segment assembling and positioning electro-hydraulic control system adopting a load-sensitive technology. The system comprises a motor, a variable pump, a two-position three-way proportional reversing valve, a variable cylinder, an overflow valve, a pressure reducing valve, a pressure compensating valve, a one-way valve, a multi-way valve, a balancing valve, a hydraulic lock, a hydraulic motor, a hydraulic cylinder, a moment rotation speed sensor, a displacement sensor and a pressure sensor. The multi-way valve with the pressure compensating valve in a segment assembling system is used for controlling the rotation speed of the hydraulic motor for driving the segment assembling machine to rotate and the moving speed of each hydraulic cylinder. The pressure sensor is used for detecting the pressure of a main oil passage of the system and the working pressure of each executer in real time; and a computer control unit is used for determining a variable pump control signal according to a system pressure signal, so that the displacement of the variable pump is changed with the load change so as to achieve load sensitive control. According to the invention, energy waste caused by continuous oil supply at the highest working pressure of the traditional system is avoided, the throttling loss and overflow loss are greatly reduced, and an obvious energy saving effect is obtained.

The invention relates to a method for applying a virtual reality technology to a fabricated building industry. The method comprises the steps of firstly, building 3D models of fabricated building members, and endowing the fabricated building members with attribute information; secondly, establishing fabrication rules of the fabricated building members through a virtual reality system; thirdly, performing splicing construction of the fabricated building members based on the fabrication rules of the fabricated building members in a VR scene by a designer through wearing a VR device to generate a fabricated building; and finally, performing rationality verification on the generated fabricated building, and if the verification succeeds, exporting a fabricated building member list and calculating total mass of the fabricated building based on member list information. According to the method, the immersive experience of a fabricated building design process is realized based on the VR technology; a design concept of the fabricated building is accurately passed on; the communication cost is reduced; and the communication effect is improved.

The invention discloses a high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire and a production method of the high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire. The high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire is produced by finely selecting ingredients and contents of aluminum alloy and conducting process control. The specific steps are as follows: selecting Fe, Si, Mg, Cu and Re with different weight percents, melting aluminum ingot with the content not more than 0.03% in a vertical melting furnace, adding alloying elements in a heat insulation furnace, stirring, refining, conducting on-the-spot contents rapid analysis, carrying out content adjustment, and standing, enabling the aluminum ingot and the alloying element into a continuous casting machine for casting, rolling to be a circular aluminum alloy rod on a continuous rolling machine, pulling the circular aluminum alloy rod to be a circular aluminum alloy wire and twisting the circular aluminum alloy wire to be a conductor for aerial power transmission and distribution. According to the application of the aluminum alloy wire and the production method of the aluminum alloy wire, the aluminum alloy wire directly replaces the generally used aluminum conductor steel reinforced and is an energy-saving, environment-friendly and novel wire.

The invention discloses a method for constructing an integrated road bed of a track traffic tunnel, which is a supporting frame method for short. Firstly, a finished track panel assembled on a base is hoisted to the constructed tunnel; and the track panel of sleepers with different forms is born through adopting a supporting frame of a lower bearing type track panel; secondly, the track panel in the construction working face is hoisted to the designed elevation; the supporting frame of the track panel is mounted to support the track panel; a transverse supporting lever is utilized to approximately fix the direction of the track panel; and finally, according to fiducial mark, the elevation of track surface, the direction of the track, level and height are adjusted to the designed positions; after the binding and welding of concrete reinforcing bars and the erection of a template of the road bed are sequentially completed, and the integrated road bed is finally subjected to concrete pouring to obtain the integrated road bed; and the steps are sequentially advanced to complete the whole construction. The method reduces control links and material waste, improves construction schedule, ensures construction quality and is mainly used for the structural construction of undergrounds, light rails, tunnels, bridges, large-scale vehicle fields and other integrated road beds.

The invention discloses a high-altitude long-span roofing pipe truss installation method which comprises the following steps: firstly, assembling pipe trusses on the ground, then arranging a construction platform beam at the high-altitude assembling pipe truss; adopting a movable tower crane to hoist the pipe trusses, and hoisting two sections of pipe trusses on an assembling bracket and a reinforced concrete stand column; finally, conducting high-altitude joint, assembly and welding on the pipe trusses; and after passing welding inspection, moving the assembling bracket to the next axis and conducting installation of the next pipe trusses. The high-altitude long-span roofing pipe truss installation method adopts ground segment assembly, movable tower crane hoisting and the high-altitude joint welding method, not only improves construction quality, guarantees construction process and safety, and simultaneously reduces construction cost.

The invention discloses an intelligent roadbed and pavement roller compaction system which comprises a quality detection system, an intelligent decision making system, an unmanned roller compaction system and a remote monitoring center. The quality detection system is used for detecting the compaction quality of various filled layers of roadbeds and pavements; compaction quality data can be analyzed by the intelligent decision making system, and roller compaction construction parameters of next procedures or new roller compaction construction regions can be obtained by the intelligent decisionmaking system; the unmanned roller compaction system can be combined with a single unmanned roller compaction machine or a group of unmanned roller compaction machines according to the roller compaction construction parameters, so that construction operation can be synergistically accomplished; real-time communication service, operation region planning, navigation routes and group scheduling service can be provided by the remote monitoring center, field operation conditions can be displayed by the remote monitoring center, and operation data can be stored by the remote monitoring center. Theintelligent roadbed and pavement roller compaction system has the advantages that the compaction quality of the different filled layers and different filling materials of the roadbed and the pavementscan be detected by the intelligent roadbed and pavement roller compaction system in an online manner, roller compaction construction operation can be controlled by means of machine decision making, accordingly, influence of human factors can be prevented, detection, analysis, decision making and control cycle can be implemented in a closed-loop manner, and the intelligent roadbed and pavement roller compaction system is particularly applicable to all-weather roadbed and pavement roller compaction construction operation scenes in hazardous regions or under extreme conditions.

The invention discloses a construction waste recycling and reusing process, which comprises the following steps of: 1, collecting waste concrete, waste mortar and waste brick slag; 2, smashing and screening, namely smashing and screening the collected waste concrete, the collected waste mortar and the collected waste brick slag to obtain regenerative rough aggregates and regenerative fine aggregates; and 3, preparing foam concrete, namely firstly preparing cement slurry, namely uniformly stirring concrete, water, the regenerative rough aggregates and the regenerative fine aggregates to obtain the cement slurry, and secondly adding a foam dilution solution, namely adding the foam dilution solution formed by uniformly mixing a foaming agent and water into the cement slurry, and uniformly stirring to obtain the foam concrete. The steps of the process are simple; the investment cost is low; the process is simple, feasible and high in operability; the waste concrete, the waste mortar and the waste brick slag can be effectively reused; the economical benefit is outstanding; the produced foam concrete material is high in heat preservation performance; and the problems that the construction waste is abandoned and stacked randomly and occupies the land, the waste of resources is severe, and the environment pollution is severe are solved.

The invention discloses a lifting platform for shaft construction, comprising an operating platform, a lifter and an electrical control system, wherein the electrical control system controls the lifter to lift the operating platform via a working steel cable, the operating platform is composed of 6 to 12 trapezoid unit joints, at least four groups of anti-collision wall-against wheels are annularly arranged around the operating platform, and the bottom of the operating platform is circumferentially provided with at least four lead screw supporting components. The lifting platform for shaft construction has the advantages of strong construction adaptability, unlimited construction height, small floor area, good construction quality, high construction efficiency, great convenience of erection and disassembly, less labor, low labor intensity and the like. The trapezoid units, which are combined as required by construction, adapt to the construction requirement under different shaft situations, excellent convenience and flexibility are obtained during installation and usage, construction time is saved, and construction cost is lowered; the anti-collision wall-against wheels and the lead screw supporting components can be adjusted to adapt to the different requirements of shaft construction, and the lifting platform can conveniently and safely prevent the operating platform from shaking and becomes more stable and reliable as a whole.

The invention relates to a composite frame system with beam column flanges being made of steel pipe concrete and a construction method. The composite frame system with the beam column flanges being made of the steel pipe concrete is formed by connecting composite columns with composite beams through joints. The composite beams are horizontally arranged among the composite columns. The joints are steel pipe concrete integral type joints. The composite columns are cross-shaped or I-shaped composite columns with the flanges being made of the circular steel pipe concrete. The composite beams are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The joints and the composite columns are fixedly connected at respective connecting plates through high-strength bolts. The joints and the composite beams are connected through buffer sections which are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The cross sections of the buffer sections are variable cross sections gradually diminished from the two ends to the centers, and the cross sections of the buffer sections are smallest at the midpoints. The problems that according to an existing steel-concrete composite structure, construction is complex, connection and stability between the composite structure are poor, and the joints are liable to damage under the earthquake effect are solved.

The invention discloses a construction method for an open excavation assembly monolithic structure subway station using a pile-strut bracing system. The demand for labor force and the using requirement for on-site building circulating materials in traditional subway station construction can be lowered to the utmost extent, and wet construction work at the construction site can be greatly reduced. Flying dust and noise pollution at the construction site are reduced, and burdens to the surrounding traffic environment are reduced as well. The influence on the surrounding environment of the construction site is lowered. The novel component bracing system is adopted at the construction site, and therefore the degree of mechanization in the construction process is improved, and the demand for labor force by engineering is lowered. Moreover, the integral construction quality of associated works can be improved obviously by the adoption of plenty of prefabricated parts.

The invention relates to a fireproof material used in an iron runner of a blast furnace cast house, in particular to an iron-runner quick-drying casting material combined with silica sol, which comprises the following raw materials in percentage by weight: 67 percent of Al2O3, 24.8 percent of SiC, 3 percent of carbon element material, 0.2 percent of dispersant, 2 percent of antioxidant and 3 percent of expanding agent. The raw materials are prepared into bone powder and fine powder which are evenly stirred to obtain a finished product. When the iron-runner quick-drying casting material is used, the silica sol in 6-10 percent of the total casting material is added, stirred and cast in an iron-runner die to form a product, and the product is demoulded and roasted under a large fire for 3-4h to yield iron. The invention has the advantages of short trenching time, burst resistance, high construction quality, short roasting time, long service life of the casting material, lightened labor intensity of workers, castoff and waste utilization, energy saving, emission reduction, no environment pollution and environmental protection.

A system for measuring bridge bottom deformation by aid of a laser ranging method is formed by a bridge bottom settlement change measuring device and a ground settlement change measuring device, wherein the bridge bottom settlement change measuring device comprises a plurality of laser ranging instruments, a plurality of prisms, a data processing terminal and a computer, and the ground settlement change measuring device comprises a horizontal laser emitter and a plurality of scales. According to the system, the bridge bottom settlement change measuring device on the system is used for measuring deformation data of the bridge bottom relative to the ground, simultaneously the ground settlement change measuring device is used for measuring ground settlement change data, then the data are processed comprehensively to be used for determining deformation conditions of different stages of the bridge bottom in the construction process. Therefore, measuring time can be reduced, accuracy is high, error is small, and improvement of construction quality of a bridge is benefited.

The invention relates to a hydraulic connection operating platform of grounding wires, belonging to a machine tool for carrying out hydraulic connection on two electric grounding wires by using a crimping pipe. Two rails are erected on a platform base in parallel; two grounding wire support bases are arranged at the left side and the right side of the two rails by sliding blocks; a pair of hydraulic pliers are fixed in a fixed ring through a plurality of fastening bolts; the fixed ring is welded on a mounting plate; the mounting plate is arranged on the two rails through four sliding blocks arranged the lower part of the mounting plate; a stepping motor is arranged on the platform base; a ball screw is connected with the stepping motor through a shaft; the ball screw is arranged below the platform base through two sliding rail supports and spirally connected to a screw nut; and the screw nut is fixed on the bottom surface of the mounting plate. The hydraulic connection operating platform disclosed by the invention has the characteristics of simple structure, safety and reliability, controllable lapping length of the two grounding wires and high crimping efficiency.

The invention provides a wall surface ceramic tile pasting device and belongs to the technical field of decoration equipment. The wall surface ceramic tile pasting device solves the problems that existing ceramic tile pasting is laborsome, and the construction quality is poor. The wall surface ceramic tile pasting device comprises a base which is fixedly connected with two pairs of supporting shafts. The supporting shafts are slidably connected with a lifting plate which is connected with a mobile plate. A swing rack is hinged to the mobile plate and slidably connected with a positioning disc which is provided with a positioning structure. The base is provided with a vertical screw. The lifting plate is provided with a longitudinal screw. The swing rack is provided with a transverse screw. By adoption of the wall surface ceramic tile pasting device, wall surface ceramic tile pasting is more effortless, and the construction quality is higher.

A full-compensation elastic chain hanging construction method for high-speed rail contact network, which comprises a construction preparing process, a construction measuring process, a software calculating process, a precasting process for sling and dropper, a mounting adjusting process for sling and dropper, and an ending process; each process is equipped with uniform and high-quality construction standards, and is assisted by modern construction meanses for satisfying with technical requirements for construction of high-speed rail contact network of 350 km/h; the software calculating process especially can obtain more accurate pre-stowage data of dropper length via a brand new calculating method finding form based on sling net, and then improve elastic chain hanging construction accuracy for high-speed rail contact net of 350 km/h. So the construction method does not only benefit for improving accuracy of sling and droppser calculation, and the construction method but also has high-quality construction standards and modern construction meanses, and is capable of improving quality and speed of construction of high-speed rail contact net of 350 km/h.

The invention discloses a construction method of a bare concrete prefabricated box beam with a complicated structure. The construction method comprises the following steps: (1) preparing for construction; (2) processing a foundation; (3) measuring and paying off; (4) mounting a bracket; (5) paving a bottom die; (6) prepressing the bracket; (7) binding a steel bar framework; (8) constructing by a corrugated pipe; (9) mounting a side die board; (10) supporting an outer side die board; (11) mounting a core die; (12) pouring bare concrete; (13) carrying out concrete maintenance; (14) mounting a support; (15) treating the surface of a beam plate; and (16) removing the die. According to the method disclosed by the invention, construction steps are simplified and the construction period is shortened; the construction of the bare concrete prefabricated box beam with the complicated structure is realized, and materials are saved and labor hours are shortened; and the construction quality is improved, and the economic benefits and the social benefits are obvious.

The invention relates to installation project construction of a vaporization-cooling chimney of a large converter, in particular to ground assembling and welding integral installation and construction technology for the vaporization-cooling chimney. The technology comprises the following steps: laying a steel platform and making a chimney support by using steel plates; transporting a cooling chimney to an installation site by using a large-tonnage flat truck; assembling the cooling chimney by using a large-tonnage crane; performing all-position ground welding on the vaporization-cooling chimney by adopting argon tungsten arc welding; performing 25 percent of radiographic detection and a corresponding airtight test on the welded chimney according to construction specifications; hoisting the chimney integrally; and fixing chimney system equipment according to the following sequence: curved chimney, cooling chimney and movable chimney so as to complete the installation of the chimney. The technology ensures the welding quality of the vaporization-cooling chimney, reduces the workload of overhead construction, reduces potential safety hazard during the construction, greatly improves the working efficiency of the installation of the vaporization-cooling chimney, reduces the duration of the construction, and increases the service life of the vaporization-cooling chimney.

The invention provides a prefabricated ECC-RC combination beam column joint component, wherein ECC refers to engineered cementitious composites, and RC refers to reinforced concrete. The prefabricated ECC-RC combination beam column joint component comprises a joint, an outward-extending column and an outward-extending beam, wherein the joint, the outward-extending beam and the outward-extending column are respectively composed of an ECC material, longitudinal bars and stirrups, the outward-extending length of the outward-extending column is about 1-2 times of the height of the column section, the outward-extending length of the outward-extending beam is about 1-2 times of the height of the beam section, H-shaped steel is embedded in the end of the outward-extending beam and the end of the outward-extending column, the embedded depth ranges from 10 cm to 20 cm, the H-shaped steel and the longitudinal bars extend out of the ends for 10-20 cm, the embedded part of the H-shaped steel is welded to the longitudinal bars, the embedded H-shaped steel of a prefabricated RC beam, the embedded H-shaped steel of a prefabricated RC column and the embedded H-shaped steel of the prefabricated ECC joint are connected through high-strength bolts, and the longitudinal bars are connected through a straight thread sleeve. According to the prefabricated ECC-RC combination beam column joint component, the prefabricated beam column joint component formed by pouring the steel bar reinforced ECC material is applied to an assembly type frame structure, compared with a general reinforced concrete joint component, the ductility and the anti-seismic property of the structure are improved remarkably, the number of joint stirrups in use is reduced substantially, pouring is facilitated, and construction is convenient; besides, the high tenacity of the ECC material can reduce residual deformation of the structure after an earthquake, and therefore post-earthquake repair expenses are reduced.

The invention relates to a cement-based self-leveling mortar, and more particularly relates to a macromolecular adhesive cement. The macromolecular adhesive cement comprises the components in parts by weight: 80-100 parts of water-borne epoxy resin, 16-20 parts of water-borne epoxy curing agent, 120-150 parts of complex portland cement, 30-50 parts of quartz silt powder, 10-15 parts of water, 35-50 parts of pigments and fillers, 0.3-0.5 parts of wetting dispersant, 2-6 parts of self-leveling additives, and 2-5 parts of water-borne color paste. The macromolecular adhesive cement disclosed by the invention is a single-component, dry-powder-shaped and water-borne self-leveling cement-based hard/soft type waterproof adhesion-blocking and leveling material which is processed via scientific proportioning, integrates the functions of water prevention, adhesion, blockage and leveling, as well as is non-toxic and odorless, and belongs to cement-based macromolecular polymer water-borne dry-powder waterproof mortars.

The invention discloses a construction method of a prefabricated wallboard. The construction method of the prefabricated wallboard comprises the following steps of 1, numbering the prefabricated wallboard after the wallboard is prefabricated in a factory, and transporting the prefabricated wallboard to a site; 2, checking components and confirming the number; 3, before hoisting, constructing the bottom laying position of the prefabricated wallboard; 4, hoisting and installing the prefabricated wallboard, wherein before the prefabricated wallboard is hoisted, upper and lower supporting end bases of an inclined strut are firstly installed, after the prefabricated wallboard is hoisted, the prefabricated wallboard is adjusted in position and is connected with the inclined strut to be fixed, then a tower crane hook is unhooked, the perpendicularity of the prefabricated wallboard is adjusted, finally, the periphery of the prefabricated wallboard is sealed, and a grouting sleeve is utilized to conduct mortar injecting. By means of the construction method of the prefabricated wallboard, a component assembly mode is adopted, a structural wallboard is divided into multiple blocks, after being prefabricated in the factory, the prefabricated wallboard is hoisted and installed on spot, and certain construction treatment is conducted, which helps to improve the construction quality, accelerate the engineering progress, and improve the building quality.

The invention discloses a composite box girder bridge erected in advance by using corrugated steel web steel girders. The bridge comprises a concrete soleplate, a steel girder and a concrete upper top plate, wherein the steel girder is a corrugated steel web steel girder structure; the steel girder comprises a pair of corrugated steel webs which is arranged vertically and symmetrically and an open-web diaphragm unit erected between the pair of corrugated steel webs; and the upper end of each corrugated steel web is provided with an upper connecting mechanism to be firmly connected with the concrete top plate, and the lower end of the corrugated steel web is provided with a lower connecting mechanism to be firmly connected with the concrete soleplate. The invention also discloses a construction method for the composite box girder bridge erected in advance by using the corrugated steel web steel girders. The corrugated steel webs are used as composite box girder webs, so dead weight of a structure is reduced, live load efficiency is enhanced and a cracking problem of a conventional concrete box girder web is solved; and simultaneously, bracket-free construction can be realized in a high pier, construction quality is enhanced, construction process is fastened and remarkable economic and social benefits are achieved.

The invention discloses a method of treating a lining after collapse of an underground cavern crown, relates to the field of underground cavern construction, and provides a method of treating the lining after collapse of the underground cavern crown, with low workload, low cost and effective collapse prevention. The method includes the steps of a, clearing collapse waste in the cavern; b, inserting at least one reinforcing anchor bar into the residual collapse waste and surrounding rock on two sides of the residual collapse waste, and allowing one end of each reinforcing anchor bar, close to the cavern, to be located in the same cross section; c, connecting an arch beam matching with the cross section of the cavern crown in shape to all reinforcing anchor bars, and attaching the arch beam to the cavern crown; d, subjecting the residual collapse waste to systematic consolidation grouting; and e, repeating the steps from a to d until the collapse waste in the cavern is fully cleared. The method is applicable to repairing collapsed underground caverns.

The invention discloses a fiber grating sensing-based asphalt pavement compaction monitoring method, relates to the field of compactness quality control in an asphalt pavement construction process, and aims at meeting the requirements of simply and effectively controlling the asphalt pavement compaction times in real time. A fiber grating vertical strain sensor and a temperature sensor are implanted into a lower layer of a monitored asphalt layer; the fiber grating vertical strain sensor and a fiber grating interrogator are in butted connection; an asphalt mixture of the monitored layer is paved; a road roller collects information sent out by the fiber grating vertical strain sensor while grinding; a change curve of a strain response peak of the fiber grating vertical strain sensor along with the grinding times is extracted; a compaction evaluation index SDI is obtained through curve differentiation; when the SDI is close to 0 for successive two times, grinding is stopped; and compaction monitoring of the asphalt pavement is finished. The fiber grating sensing-based asphalt pavement compaction monitoring method is applicable to compaction quality monitoring of other pavements.

The invention discloses a rigid grid and pile composite foundation and a method applied to reinforcing soft soil foundation. The rigid grid and pile composite foundation comprises a precast pile or a cast-in-situ pile, a rigid grid structure, a tensioning net, tensioning ribs and a transitional underlayer; the precast pile or the cast-in-situ pile drives to a relatively hard ground layer from a foundation surface layer; the rigid grid structure is fixedly connected with the precast pile; the grid structure is paved with the tensioning net; the tensioning net is provided with the transitional underlayer; the transitional underlayer is tightly contacted with the foundation surface, and the thickness of the transitional underlayer is between 0.6 and 1.5 meters; and the transitional underlayer is sandy clay, gravel soil or plain concrete with crude particles. The invention organically combines the rigid grid and the pile structure, the transitional underlayer and a soft ground layer to construct a composite foundation, transfers the load to a deep layer soil body through the grid structure and a pile, can give a full play to the strength and the deformation performance of the deep layer soil body, thereby effectively improving the foundation strength and the deformation performance, and having good reinforcing effect.

The invention discloses a construction method of asphalt wave roads, the method comprises the following steps: calculating sinusoidal function according to a sine curve parameter given by a designed file, calculating each on-site encrypted three dimensional coordinate by a computer, selecting elevation datum paved by asphalt by establishing a calculation model, completing the construction of roadbed and base course, paving the parts below a surface layer on the case course, then paving an asphalt mixture to form an asphalt surface layer, successfully finishing the final molding of the asphaltwave roads. The construction method of the invention is capable of greatly raising the quality of pavement construction and effectively guaranteeing the standard performance of asphalt wave pavement molding.

The invention relates to the technical field of geotechnical engineering, particularly to a construction process of steel fiber shotcrete. The process is characterized in that cement of the shotcrete construction material selects portland cement, the cement grade is 32.5#, the water cement ratio is 0.40-0.60, the sand selects medium coarse river sand, the fineness modulus is 2.5-3.3, the stone selects grain composition, the maximum particle size does not exceed 10 mm, the sand ratio is 50-100%, the steel fiber has an elasticity modulus of 200 GPa, a tensile strength of 380-1300 MPa, an ultimate elongation of 3-30%, a length of 20-35 mm and a volume ratio of 0.5-2.0%, the steel fiber content is 2.5-4.0%, the water-reducing agent content is 0.02-0.05%, and an additive and an admixture select active fly ash, grinded fine slag and silica fume. According to the present invention, the construction process is improved, and the construction quality of the steel fiber concrete is increased.

The invention discloses a high-temperature walking beam furnace beam and column insulation lining slag-adhesion-preventing coating. The coating comprises the raw materials of, by weight: 55-60% of the bauxite clinker, 5-10% of magnesium aluminate spinel, 5-10% of calcined anthracite, 2-5% of flake graphite, 3-6% of silicon carbide, 4-6 % of alpha-Al2O3 powder, 4-6% silica micro-powder, 5-7% of calcium aluminate cement, 0.5-1.5% of metal silicon powder, 2.5-3.5% of water-soluble epoxy resin and water-soluble curing agent, 0.05-0.10% of explosion-proof fiber, 0.1-0.15% of sodium hexametaphosphate, 0.05-0.10% of an organic reducing agent, and 0. 04-0.07% of an organic silane coupling agent. With the slag-adhesion-preventing coating, the comprehensive targets are achieved, that service lives of the furnace beam and the column insulation lining are prolonged, furnace energy consumption and insulation lining surface slag adhesion amount are reduced, furnace maintenance cost is reduced, and high-temperature-oriented silicon steel production efficiency is improved.

The invention discloses automatic distorted concrete grouting and vibrating equipment, which belongs to the technical field of construction and comprises an excavator, a hydraulic system, a slurry supply station, a grouting and vibrating device, a PLC (programmable logic controller) control system and an operation screen. The slurry supply stations is connected with a load-bearing main beam of the excavator via a slurry supply station bracket, the grouting and vibrating device is connected with a four-rod mechanism rocker arm of the excavator by a connecting part via a hinge pin, the PLC control system is located on a rotary worktable of the excavator, and the operation screen is mounted in a driving cab of the excavator. The automatic distorted concrete grouting and vibrating equipment simultaneously has grouting and vibrating functions, can realize free switching between a grouting work state and a vibrating work state, automatic alignment of working devices, accurate control of grouting quantity and the like, is flexible in movement, uniform in grouting, large in vibrating force and simple in operation, increases construction speed and quality, reduces labor intensity of workers, and is applicable to distorted concrete grouting and vibrating construction in various work places.

The invention relates to a construction method for lifting a broad width steel box girder cantilever. A cantilever lifting machine is installed on a finished bridge segment, a steel box girder to be lifted and installed is transported below the position to be installed by a girder transportation ship, and loading tentative lifting is carried out on the lifting machine by utilizing the steel box girder; the steel box girder is lifted to a bridge deck set elevation by the cantilever lifting machine, secondary tensioning is carried out on a stay cable of the finished bridge segment located by the cantilever lifting machine, and then axial-direction bridge deviation regulation, direction across bridge deviation regulation, girder segment elevation regulation and girder segment deformation regulation are carried out on the lifted steel box girder; the lifted steel box girder and the finished bridge segment are in whole section welding, hanging and first tensioning are carried out on the stay cable of the lifted girder segment, and then holding load is discharged by the cantilever lifting machine; and a next steel box girder is lifted by repeating the steps.