109 results about "High strength concrete" patented technology

This invention relates to a rapid-setting high-strength concrete and its preparation method. The rapid-setting high-strength concrete comprises the following raw materials in parts by weight: 100-200 parts cement, 80-100 parts coarse aggregate, 40-60 parts fine aggregate, 10-20 parts rubber powder, 20-30 parts modified straw-based carbon powder, 0.3-0.5 parts coupling agent, and 0.6-0.8 parts water-reducing agent. The modified straw-based carbon powder is obtained by first adding straw powder to an activation solution containing aluminum sulfate, carboxymethyl starch, and triethanolamine, followed by activation, ball milling, and freeze-drying to obtain a precursor. The precursor is then mixed with flake aluminum powder and heated under an inert atmosphere to obtain the final product. The mass fraction of aluminum sulfate is 5-10%, the mass fraction of carboxymethyl starch is 5-10%, and the mass fraction of triethanolamine is 3-5%. This invention improves the rapid setting effect, compressive strength, flexural strength, and crack resistance of concrete by incorporating modified straw-based carbon powder into the concrete components. This is of great significance for improving the overall performance of concrete and developing infrastructure construction.

The invention discloses a blast furnace slag flushing water chute and a wear-resistant lining for the chute, and relates to the technical field of blast furnace equipment, the water chute comprises a dry slag layer, a common concrete layer, a water slag cast iron lining and the wear-resistant lining; the common concrete layer and the grain slag cast iron lining layer are lower than the dry slag layer and higher than the wear-resistant lining layer; the bottom of the cross section of the wear-resistant lining is arc-shaped, and the radius R of the arc is more than or equal to 200mm and less than or equal to 400mm; the wear-resistant lining layer is provided with a sawtooth-shaped convex body; and a steel wire mesh is laid between the wear-resistant lining layer and the water slag cast iron lining layer. The wear-resistant lining for the chute is formed by mixing and pouring high-strength concrete and scrap iron filler according to the mass ratio of 1: (0.2-0.8), and the particle size of the scrap iron filler is 1-10 mm. The strength grade of the high-strength concrete is not lower than C60. The blast furnace slag flushing water chute can solve the problems that an existing blast furnace slag flushing water chute is poor in structural integrity, a chute lining is prone to abrasion and damage, maintenance is difficult, and cost is high.

The application provides a preparation process of high-strength concrete, and belongs to the technical field of concrete, and comprises the following steps: step S1, Mg-Al-LDH-NO2 powder is prepared; step S2, microcapsules are prepared; step S3, machine-made sand, granite crushed stone, Portland cement, slag powder, limestone powder, metakaolin, microcapsules, water, a water reducing agent and Mg-Al-LDH-NO2 powder are mixed and stirred to obtain high-strength concrete. The application can achieve the purpose of improving the strength and durability of concrete.

A kind of automatic opening device and method of high-strength concrete in radioactive site, including device base, device column, opening motor, device spindle, tool magazine;Base includes base body, datum plane, electromagnet, lifting eye screw, coarse guide device, positioning pin, the upper surface of base body is datum plane;Base body side is provided with electromagnet, coarse guide device and positioning pin;Device column supports concrete opening device spindle and spindle auxiliary support;Device column includes column lifting motor, speed reducer, cylindrical slide rail, T-type screw;Column lifting motor is set on the upper portion of device column, column lifting motor lower side is connected with speed reducer, speed reducer is connected with T-type screw, cylindrical slide rail is set on device column, drives device spindle to lift.

The invention discloses an uninterruptible power transmission and transformation station support column reinforcing structure, and relates to the technical field of power equipment reinforcement. According to the uninterruptible power transmission and transformation station support column reinforcing structure, under the mutual cooperation of the reinforcing assembly and the reinforcing assembly, when the problems of weathering damage and the like occur to a support column body of a transformer station, after the reinforcing assembly and the reinforcing assembly are installed on the outer wall of the support column body to form a grouting space, concrete is poured into the interior to wait for solidification forming; through cage type sleeving and pouring of high-strength concrete, the support column has large supporting strength, the overall stability of the transformer substation is kept, good supporting performance is kept in the long-term use process, and the service life of the transformer substation is prolonged. After the whole concrete is solidified and formed, the reinforcing assembly can be detached to facilitate follow-up reuse, the whole mounting and fixing mode is not complex, the consumed time is short, the grouting space has a good sealing effect, and the problem of leakage during concrete pouring is prevented.

The invention provides a unit braking system. The unit braking system comprises a rotating shaft; the brake disc is fixedly mounted on the rotating shaft; the brake comprises at least one brake plate, and the brake plate is configured to make contact with the brake disc so as to limit rotation movement of the brake disc along with the rotating shaft; the rotating shaft is arranged in the vertical direction, and the brake disc is located at the upper end of the rotating shaft in the vertical direction. The brake maintenance and replacement difficulty can be reduced on the first aspect, meanwhile, a safety hole for maintaining and replacing the brake does not need to be designed in high-strength concrete on the second aspect, and therefore the overall strength of a high-strength concrete building cannot be damaged; and finally, the cost of the high-strength concrete building can be reduced while the structural strength of the high-strength concrete building is ensured.

The invention discloses a preparation method of a high-strength concrete additive, the preparation method of the high-strength concrete additive is used for preparing the high-strength concrete additive, the preparation method of the high-strength concrete additive is realized through a preparation device of the high-strength concrete additive, and accurate proportioning of reaction liquid is completed by arranging a mixing mechanism; reaction liquid and water are fully hydrolyzed through three groups of liquid guide plates, a lower cylindrical cam is controlled to reciprocate up and down, the lower cylindrical cam controls a communicating pipe, a right compaction rod and a left compaction rod to reciprocate up and down, and the right compaction rod extrudes a sponge through a right compaction block to realize condensation work of the reaction liquid and formaldehyde; a communicating pipe performs piston motion through a liquid return plate, condensed reaction liquid is pumped into a neutralization cylinder, a left compaction rod extrudes a sponge to add liquid caustic soda into the reaction liquid, and therefore neutralization work is achieved, compared with an existing device, the adding proportion of formaldehyde and the liquid caustic soda can be controlled, and the situation that the proportion is not uniform enough is avoided.

The utility model discloses a rack rail concrete sleeper which comprises a foundation structure, a sleeper body is arranged on the foundation structure, and an embedded part is arranged in the sleeper body and used for connecting the sleeper body with the foundation structure of a railway line. Steel rails are arranged at the two ends of the foundation structure, the steel rails and the foundation structure are tightly connected through a fastener system, a rack rail body is arranged in the middle of the foundation structure, and the rack rail body and the foundation structure are tightly connected through a fastener system. According to the rack rail concrete sleeper, the embedded structure on the sleeper is tightly matched with a specially-made fastener system, stable longitudinal and transverse constraint is formed, displacement of the sleeper under the load effect of a train is effectively prevented, meanwhile, due to the application of a high-strength concrete material, the compression resistance, fracture resistance and abrasion resistance of the sleeper are improved, the service life is prolonged, and the service life of the sleeper is prolonged. The fastener system is simple in structure and easy to install and maintain, the maintenance cost is reduced, the toothed rail body is subjected to special treatment, and the abrasion resistance is improved.

The invention belongs to the technical field of deep ground environment mechanical testing, and discloses a device and a method for simulating a three-dimensional ground stress environment through prestressed reinforcements. The device comprises a test piece main body part, a prestress applying part, a positioning and reinforcing part and a monitoring and feedback part, the test piece main body part is composed of a stress test piece and a high-strength concrete outer layer, and the prestress applying part applies prestress through prestressed steel bars arranged in three directions by a post-tensioning method and is fixed; the positioning reinforcement part realizes prestressed reinforcement positioning and concrete protection, and the monitoring feedback part acquires strain data. According to the invention, the problems of unstable stress, low scene reduction degree and too high cost in the existing crustal stress simulation technology are solved, and the three-dimensional crustal stress environment of the deep ground can be accurately simulated.

The application provides a magnesium phosphate cement-based grouting repair material and a preparation method thereof, and raw materials of the magnesium phosphate cement-based grouting repair material include: magnesium phosphate cement, fine aggregate and a composite reinforcing component; the composite reinforcing component includes: aluminum tripolyphosphate or an aluminum tripolyphosphate modified product and carboxymethyl chitosan. The application has high hourly strength and super-high later strength, and meets the repair and grouting requirements of high early strength and super-high strength concrete; meanwhile, the preparation method is simple and has strong operability.

The invention discloses a forming die for a reserved hole of a reinforced concrete floor slab. The forming die comprises a floor slab bottom formwork and a forming core die arranged on the floor slab bottom formwork. Wherein the outer wall of the forming core mold is coaxially sleeved with a pre-buried supporting pipe, and the multiple self-destruction type supporting pieces are evenly distributed in the circumferential direction of the pipe wall of the pre-buried supporting pipe and fixedly connected with the forming core mold; the center fixing support is inserted into an inner cavity of the forming core mold, the lower end of the center fixing support is fixedly connected with a floor bottom mold plate, and the center fixing support is used for pressing the forming core mold from the inside. Connection is actively relieved through the self-destruction mechanism, violent form removal is avoided, damage to the inner wall of a high-strength concrete hole is thoroughly eliminated, and structural integrity is guaranteed; the water in the concrete curing environment is used as a trigger source, time sequence control is achieved, external energy input is not needed, the mechanism works reliably, the automation degree is high, operation is easy and fast, the working efficiency is greatly improved, the labor intensity and the man-hour cost are reduced, applicability is high, and the wide market prospect is achieved.

The utility model discloses a C80 high-strength concrete large-top-diameter part prestress electric pole, which belongs to the technical field of electric poles, and comprises an upper electric pole and a lower electric pole which are installed in a combined mode, clamping grooves are formed in the combined ends of the upper electric pole and the lower electric pole, an upper flange seat is installed outside the clamping groove of the upper electric pole in a clamping mode, and a lower flange seat is installed outside the clamping groove of the lower electric pole in a clamping mode. A lower flange seat is clamped outside the clamping groove of the lower electric pole; a plurality of short threaded rods are fixed to the upper flange base at equal angles, threaded rings are arranged outside the short threaded rods in a threaded and sleeving mode, a plurality of hollow columns are fixed to the upper flange base at equal angles, and the hollow columns and the short threaded rods are distributed in an up-down corresponding mode; a plurality of long threaded rods are fixed on the lower flange seat at equal angles; stress generated on the upper electric pole and the lower electric pole after combination can be effectively buffered through the buffering mechanism, and the stability of combined installation of the upper electric pole and the lower electric pole is kept.

The high-strength concrete floor tile for the road for constructional engineering comprises four sets of concrete tile bodies, fixing mechanisms are arranged among the four sets of concrete tile bodies, the concrete tile bodies are equilaterally distributed in an octagonal structure, four sets of connecting grooves are equidistantly formed in the outer surface of the upper end of each concrete tile body, and each fixing mechanism comprises an inner ring sleeve; four sets of first hinge seats are annularly and fixedly connected to the outer surface of the inner ring sleeve at equal intervals, buffer mechanisms are hinged to the four sets of first hinge seats, and an elastic metal plate is arranged between every two adjacent buffer mechanisms; the structure of the device can effectively overcome the defects of instability in an external human use factor state and irregular stress pulling such as thermal expansion and cold contraction in a ground soil or material state, so that effective stability of a concrete brick body in the use process is guaranteed, the probability that the concrete brick body is accidentally upwarped or damaged due to accidental stress pulling is reduced, and the service life of the concrete brick body is prolonged. Therefore, high use efficiency of the concrete brick body is guaranteed.

The utility model provides a pretensioning method prestressing force variable strength concrete prefabricated component, which comprises a component concrete body, a prestressing force steel strand and a reinforcing steel bar, the component concrete body comprises a high-strength concrete body and a low-strength concrete body, the high-strength concrete body adopts high-strength concrete with a compressive strength standard value of 60-200MPa, the low-strength concrete body adopts high-strength concrete with a compressive strength standard value of 60-200MPa, and the high-strength concrete body adopts high-strength concrete with a compressive strength standard value of 60-200MPa. The high-strength concrete body wraps the prestressed steel strand in the high-strength concrete body, the low-strength concrete body is made of low-strength concrete with the compressive strength standard value of 30-50 MPa, and the low-strength concrete body is arranged above the high-strength concrete body or surrounds the high-strength concrete body in a half mode from the upper portion and the two end faces of the high-strength concrete body. The concrete of the low-strength concrete body and the concrete of the high-strength concrete body are combined into a whole in a layered pouring mode. According to the design, under the condition that the bearing capacity requirement of the component is met, the performance of concrete with different strengths is fully exerted, the cross section height and the self weight of the component can be properly reduced, the cost performance of the prestressed component is improved, and the problems that in the prior art, materials of a prefabricated component cannot be fully utilized, and the performance and the cost of the prefabricated component are difficult to balance are solved.

The application discloses a three-dimensional curved brick arch splicing unit, a three-dimensional curved vault system and a manufacturing method, relates to the technical field of assembled vaults, and comprises a three-dimensional curved brick arch body, a plurality of soft connecting pieces and a keel frame. The three-dimensional curved brick arch body comprises a three-dimensional curved brick body and a UHPC high-strength concrete pouring body. The three-dimensional curved brick body is a three-dimensional curved surface formed by splicing a plurality of brick bodies. Filling intervals are arranged between the brick bodies. The UHPC high-strength concrete pouring body is used for integrally pouring the outside of the three-dimensional curved brick body and the filling intervals. The bottom end of each soft connecting piece is embedded and fixed to the top of the three-dimensional curved brick arch body, and the top end is used for being connected with the bottom of the keel frame. The top of the keel frame is used for being connected with a concrete main body structure. The application forms an assembled prefabricated part by pouring UHPC high-strength concrete on the brick body. The structure is simple, the construction is convenient, the integrity is good, the curved surface is smooth, the precision is high, the self weight is light, and the cost is effectively reduced.

The utility model discloses a high-strength building concrete pile which comprises a drilling steel pipe pile, the drilling steel pipe pile comprises a steel pipe, a reinforcement cage and concrete, the reinforcement cage is placed in the steel pipe, and the steel pipe is filled with the concrete; the deviation preventing assembly comprises a mounting plate, a supporting block, a first threaded hole, a supporting plate, a second threaded hole, a bolt and a second limiting groove, the mounting plate is fixed to the inner side of the steel pipe, the supporting block is fixed to the side edge of the mounting plate, the first threaded hole is formed in the middle of the supporting block, and the second threaded hole is formed in the middle of one end of the supporting plate; the bolt is screwed in the first threaded hole and the second threaded hole, and the second limiting groove is formed in the other end, away from the second threaded hole, of the supporting plate. The utility model solves the problem that when a reinforcement cage is placed in a steel pipe, if the placement position is deviated or the reinforcement cage is deviated in the pouring process, the installation positions of an upper top plate and an upper building are deviated, and the overall performance of a pile is reduced.

The invention provides a high-strength concrete low-cost mix proportion optimization calculation method, and relates to the technical field of civil engineering, according to the method, the types of colloids used for manufacturing high-strength concrete are obtained, a plurality of reference colloid vectors are randomly generated within the allowable range of the dosage ratio of each colloid, and the high-strength concrete under each reference colloid vector is prepared. Obtaining the performance parameters of the high-strength concrete, calculating the correlation between each performance parameter and each colloid, and constructing and training a performance prediction model colloid by taking the reference colloid vector as the input and the performance parameters of the high-strength concrete as the output; constructing a strength constraint condition based on the compressive strength and the tensile strength, and generating a plurality of colloid vectors meeting the strength constraint condition to form an initial population; and carrying out selection, directional crossover and mutation operation on the colloid vectors in the initial population based on the performance parameters, executing iteration operation until a preset number of iterations is reached, and selecting an optimal concrete colloid vector from the iteration population iterated for the last time based on the performance parameters and the price.

The application discloses a kind of assembled beam column built-in T-shaped steel node fills UHPC connection method, including prefabricated beam column, node connection, damping setting and sleeve mould grouting steps, the method utilizes mould mechanism prefabricated concrete column with T-shaped steel and laminated beam, then connect T-shaped steel in beam and column by high-strength bolt, and set damping device between the upper and lower relative wing plate of T-shaped steel, finally, sleeve U-shaped mould in node connection part, pour ultra-high strength concrete UHPC, enhance the integrity of node, improve the ductility and energy dissipation capacity of node, realize fast, reliable node connection, both guarantee the high efficiency of node area mechanics transmission, also have reliable anti-seismic energy dissipation characteristics, the method has the advantages of convenient construction, superior anti-seismic performance, node reliability is high, applicable to the demand for efficient, environmental protection, safety in modern building, can improve the construction efficiency and structural performance of prefabricated building.

The utility model relates to the technical field of concrete processing equipment, and discloses a concrete mixer for high-strength concrete production, which comprises a mixing drum, the top of the mixing drum is fixedly connected with a feeding mechanism, the bottom of the mixing drum is fixedly connected with a plurality of support legs, the bottoms of the plurality of support legs are fixedly connected with a support plate, and the support plate is fixedly connected with the feeding mechanism. The top of the supporting plate is fixedly connected with a stirring mechanism, the exterior of the stirring barrel is fixedly connected with a discharging mechanism, the bottom of the supporting plate is fixedly connected with an angle adjusting mechanism, the stirring mechanism comprises a servo motor, and the bottom of the servo motor is fixedly connected to the top of the supporting plate. According to the utility model, the effect of circularly stirring the materials in a reciprocating manner is realized, the agglomeration state of the raw materials is broken in all directions, the components of the raw materials are fully contacted and uniformly dispersed, the proportion of the concrete is accurately controlled, the quality and the performance stability of the high-strength concrete are practically guaranteed, and the production efficiency is improved.

The utility model discloses a prestressed concrete steel bar truss composite board, including prefabricated prestressed bottom layer, steel bar truss layer and cast-in-situ composite layer, its characterized in that: the top fixed connection of prefabricated prestressed bottom layer has steel bar truss layer, and the outside of steel bar truss layer and located the top pouring of prefabricated prestressed bottom layer has cast-in-situ composite layer, and the main body of prefabricated prestressed bottom layer is high -strength concrete pouring board. The utility model discloses through the innovative configuration of six straight steel strands and steel strand ring combination structure of prestressed steel strand, can form bidirectional prestressed system when the prefabricated bottom board bears load, and steel strand ring effectively restricts concrete transverse deformation, and straight steel strand provides longitudinal pre -stress, and the synergistic effect makes the bottom board crack resistance improve, adopts micro -inflation concrete pouring composite layer and through interface agent and enhances interlayer adhesion, solved the technical problems that traditional composite board is easy to appear interlayer peeling under the action of temperature difference shrinkage.

The utility model discloses a novel multifunctional composite connecting piece, belongs to the field of building heat preservation, and aims to solve the problems of an existing sandwich wallboard connecting piece. Comprising a structure body, the structure body comprises wave steel bars, vertical stirrups, anchoring ends and ultrahigh-strength concrete, the wave steel bars are in a transverse wave shape, the vertical stirrups are horizontally arranged at intervals along the wave steel bars, the ultrahigh-strength concrete enables the wave steel bars and the vertical stirrups to be poured inside, and the ultrahigh-strength concrete is in a horizontally-arranged cylinder shape; the zero phase line of the wave steel bar coincides with the axis of the ultrahigh-strength concrete, and anchoring ends are arranged at the two ends of the ultrahigh-strength concrete respectively. When the reinforced concrete pile is horizontally used, shearing force is jointly borne by the wave steel bars, the vertical stirrups and the ultrahigh-strength concrete, and pulling force is jointly borne by the wave steel bars and the fiber bodies. Experiments show that the shear resistance and the tensile property of the structural main body of the structure are close to those of a metal connecting piece, and no obvious heat bridge phenomenon exists.

The utility model relates to concrete chiseling technology field, concretely relates to a chiseling structure with feed drive, including chiseling head, feed connecting piece and chiseling subassembly, chiseling subassembly with feed connecting piece connects, feed connecting piece with Chiseling head connects, chiseling subassembly includes inner housing, drive unit set up in inner housing and power conversion unit connected with drive unit, power conversion unit includes second piston piece and power conversion piece, the second piston piece is formed with second piston cylinder in, the first oil cavity is formed with in second piston cylinder, second piston cylinder is provided with the oil outlet that communicates with first oil cavity, the oil outlet is connected with oil pipe, the technical problem that the texture of the shallow that the current pure rotary type chiseling equipment is formed when handling high strength concrete because of the insufficient force, cannot form effective mechanical lock structure, thereby influence new and old concrete bonding strength technical problem is solved.

The utility model relates to the technical field of concrete bricks, in particular to a light high-strength concrete brick which comprises a concrete brick body, a plurality of first reinforcing steel bars which are transversely arranged and a plurality of second reinforcing steel bars which are longitudinally arranged are arranged in the concrete brick body, and a hollow cavity is formed in the concrete brick body. The hollow cavity penetrates through the concrete brick in the length direction of the concrete brick, a plurality of water guiding grooves are formed in the top face of the concrete brick, a through hole is formed in the center of the top face of the concrete brick, the through hole penetrates through the concrete brick, and the water guiding grooves are communicated with the through hole. The concrete brick disclosed by the utility model has the technical effects of high strength and light weight.

The invention relates to the field of concrete processing, and particularly discloses ultrahigh-strength concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 320 to 340 parts of cement, 40 to 60 parts of fly ash, 90 to 110 parts of mineral powder, 155 to 165 parts of water, 640 to 660 parts of sand, 1000 to 1100 parts of gravel, 7.4 to 7.9 parts of an additive, 10 to 16 parts of material-carrying steel fibers, 5 to 10 parts of material-carrying aramid fibers and 10 to 20 parts of reinforced particles, the preparation method comprises the following steps: S1, uniformly mixing and stirring the cement, the fly ash, the mineral powder, the sand and the gravel to obtain a primary mixture; s2, adding material-loaded steel fibers, material-loaded aramid fibers and reinforced particles into the primary mixture, mixing and stirring uniformly, then adding water and an additive, and continuously stirring uniformly to obtain a mixture; s3, pouring and curing the mixture to obtain concrete; the concrete has the advantages of high strength and good anti-seismic effect.

The utility model discloses a high-strength concrete high-pressure hardness detection device, and particularly relates to the technical field of concrete hardness detection, the high-strength concrete high-pressure hardness detection device comprises a bottom plate, a supporting vertical plate is fixedly arranged at the rear part of the top end of the bottom plate, a top plate is fixedly arranged at the top end of the supporting vertical plate, and a pressurizing assembly is arranged at the bottom end of the top plate; a detection plate is arranged on the inner side of the fixed frame, a placement plate is fixedly connected to the top end of the detection plate, a placement groove is formed in the top end of the placement plate, and a pressure sensor is installed between the detection plate and the placement plate; the two sides of the bottom end of the movable protection frame are each fixedly provided with a movable plate. According to the utility model, the movable protection frame of which the position can be adjusted up and down is used for carrying out omnibearing protection on the high-pressure hardness detection process, so that the situation that fragments are splashed outwards to hurt people is effectively avoided, the safety is relatively high, detection personnel can observe the high-pressure hardness detection process in a short distance, and meanwhile, detection data can be displayed in real time; and the use effect is good.

The application discloses fly ash and cement based aggregate-free high-strength concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is made of the following raw materials in parts by mass: 50-70 parts of 42.5 grade and above Portland cement, 15-25 parts of fly ash, 15-25 parts of silica ash, 0.5-3.0 parts of high-performance composite foaming agent, and the total water-binder ratio is 0.25-0.40. The preparation method comprises the following steps: uniformly dry mixing the cementitious material and admixture, then adding water and stirring to form a slurry; uniformly mixing stable foam prepared by physically foaming the foaming agent into the slurry; and pouring and performing combined curing of standard curing and steam curing. The application controls the dry density of the concrete at 800-1600 kg / m3, and the 28-day compressive strength is stabilized at more than 10 MPa under the condition of no traditional sand aggregate, by optimizing the ratio of the ternary cementitious system of cement-fly ash-silica ash, using high-performance foam stabilizer and strictly controlling the low water-binder ratio, so that the problems of low strength and poor durability of the existing aggregate-free concrete are solved.

The application belongs to the technical field of concrete crack detection, and specifically discloses a high-strength concrete construction crack detection system and method, which comprises a multi-parameter collaborative sensing module, a construction crack identification module, a crack risk analysis module and a crack early warning processing module. The application collects temperature, humidity, strain and multispectral image data in the plastic to hardening stage in real time through the multi-parameter collaborative sensing module, extracts crack features in combination with differential signal processing in different stages and a deep convolutional neural network, and significantly improves the detection accuracy of micro-cracks and internal defects. Meanwhile, the application innovatively constructs a crack evolution risk rate model by fusing multi-physical field data, realizes dynamic probability prediction before crack initiation, and automatically triggers a hierarchical treatment scheme through risk grade division and a progressive early warning mechanism, effectively distinguishes the causes of drying shrinkage and temperature cracks, significantly improves the prevention and control efficiency, and supports accurate monitoring of the whole life cycle of high-strength concrete.

This invention discloses a modular collaborative casting method for basalt fiber reinforced cages and steel structures on offshore platforms, belonging to the field of marine engineering technology. The method includes steps such as the preparation of prefabricated modules, classification and splicing of prefabricated modules, and on-site assembly of floating pontoons. It also proposes optimized solutions for enhanced sealing treatment, internal rebar installation, external rebar installation, and overall encapsulation with ultra-high performance concrete. This invention can use low water-cement ratio, high impermeability and compressive strength concrete materials to perform integrated external casting of the prefabricated module splices, forming a seamless integral structure. This avoids the high cost of using all ultra-high strength concrete and completely solves the technical bottlenecks of traditional modular floating pontoons, such as joint leakage, poor structural integrity, and easy corrosion of metal connectors. It achieves a balance between excellent durability, ultra-high safety, and economic efficiency throughout the entire life cycle for marine floating structures, and is suitable for major facilities such as large floating wind power platforms in deep-sea areas.

The invention is applicable to the technical field of overhanging double-row scaffolds, and provides an overhanging double-row scaffold supporting structure which comprises an overhanging layer and an overhanging steel beam installed on the upper side of the overhanging layer, one side of the overhanging steel beam extends out of the overhanging layer, an embedded anchor bolt is embedded in the overhanging layer, a sleeving hole is formed in the side, located on the overhanging layer, of the overhanging steel beam, and the sleeving hole is communicated with the overhanging layer. The cantilever steel beam is arranged on the pre-embedded anchor bolt in a sleeving mode through a sleeving hole, the pre-embedded anchor bolt penetrates through the upper end of the cantilever steel beam to be sleeved with a nut, and a vertical support is arranged on the lower surface of the cantilever steel beam. A triangular stable truss unit formed by combining a short-size vertical support, a cantilever steel beam and a supporting inclined rod is improved, the whole supporting structure is connected through a standard bearing base embedded in a high-strength concrete structure by using high-strength anchor bolts, wall penetrating is not needed, zero damage to a building structure is achieved, and the hidden danger of leakage is eradicated.

The invention belongs to the technical field of deep ground environment mechanical testing, and discloses a device and method for simulating a deep ground high temperature-three-dimensional ground stress coupling environment through a prestressed steel strand. The device comprises a test piece main body system, a prestress applying system, a positioning reinforcing system and a monitoring feedback system. The core of the method is that based on a thermal stress formula under three-dimensional complete constraint in thermoelastic mechanics, additional thermal stress caused by ground temperature rise is calculated, and the additional thermal stress and target three-dimensional ground stress are superposed; and through a post-tensioning pre-stress technology, the superposed total stress is accurately and stably applied to an internal test piece for a long time by utilizing a retard-bonded pre-stress steel strand system and a high-strength concrete transfer medium, so that a deep high-ground-temperature and high-ground-stress coupled mechanical environment is constructed. The problems that a traditional coupling test device is high in cost, difficult to control and difficult to stabilize for a long time are solved, and accurate simulation of the deep ground high temperature-three-dimensional stress coupling environment is achieved.