126 results about "Self-consolidating concrete" patented technology

The invention provides a construction method of a CRTS III type slab ballastless track, and relates to the technical field of high-speed rail construction, and the construction method comprises the following steps: mounting base plate steel bars, side forms, end templates and limiting groove templates, placing foam plates at expansion joints, and reserving track slab pressing and anchoring holes; base plate concrete is poured, and base plate concrete formwork removal, surface finishing, maintenance and expansion joint construction are carried out after pouring; constructing a geotextile isolation layer and an elastic cushion layer; limiting groove steel bars and self-compacting concrete layer steel bar meshes are installed, and track plates are placed; before and after the track plate and the base plate are fastened by the pressing device, the track plate is finely adjusted by the fine adjustment device; and a self-compacting concrete formwork is installed, self-compacting concrete is poured, and post-pouring treatment and curing are conducted. The track plate and the base plate are fastened through the pressing device, so that the track plate, the base plate and the self-compacting concrete layer are tightly attached in the self-compacting concrete pouring period, and the situation that reworking or track laying is difficult due to the fact that the floating amount of the track plate is too large is avoided.

The invention relates to the technical field of geotechnical engineering anchoring, in particular to a method for testing the degradation characteristic of the bearing performance of a recyclable anchor rod under cyclic loading. The method comprises the following steps: preparing a unit body sample anchor-rock interface unit body sample, simulating weathered soft rock according to a specific ratio, pouring a self-compacting concrete anchoring body, and curing and forming; setting a combined parameter of a reference load ratio and a load cycle index, applying a triangular wave cyclic load to simulate a traffic condition, and executing a pull-out test to collect load-displacement data; constructing a two-parameter coupled shear strength degradation model based on test data, and proposing a shear stress-displacement curve model; an anchor rod load transfer control equation is established in combination with the Poisson effect, and shear stress distribution of the anchoring section is iteratively solved by adopting a discrete recursion method; the model is verified through a foundation pit engineering case, the ultimate bearing capacity degradation law of the anchor rod under long-term cyclic loading is predicted, and it is proved that the model can guide engineering safety design. According to the method, the coupling characterization of the cyclic load parameter and the interface degradation mechanism is realized.

The invention relates to the technical field of bridge engineering construction control and intelligent manufacturing, and discloses a steel pipe self-compacting concrete anti-disengaging method integrating whole-process prediction and compensation regulation. The whole method comprises the following steps: collecting and preprocessing a self-compacting concrete anti-falling data set, constructing a disturbance tensor, introducing a time response coupling kernel, calculating by combining the disturbance tensor to obtain a coupling potential energy expression, then obtaining a tensor potential energy fusion item according to the disturbance tensor and the coupling potential energy expression, and constructing an asymmetric disturbance potential field coupled dual-channel module. The tensor potential energy fusion item is combined to be spliced into a potential energy state tensor, a time trend response value and a variable coupling disturbance response value at the current moment are calculated through the potential energy state tensor, the obtained time trend response value and the variable coupling disturbance response value are fused and output, and a time sequence disturbance coding module is formed; and constructing a self-compacting concrete anti-void prediction model to output a predicted value so as to realize accurate prediction of steel pipe self-compacting concrete anti-void.

The invention discloses self-compacting concrete and a preparation method thereof, and belongs to the technical field of concrete.The self-compacting concrete is prepared from, by mass, 310-320 parts of cement, 75-85 parts of fly ash, 100-110 parts of mineral powder, 830-850 parts of machine-made sand, 770-790 parts of milling material coarse aggregate, 35-40 parts of steel fiber, 8-12 parts of rubber fiber, 25-30 parts of viscosity modifier, 175-180 parts of water and 7.5-8 parts of polycarboxylic acid type water reducer. According to the self-compacting concrete and the preparation method thereof, the coarse aggregate is prepared by virtue of the rubber fibers, the steel fibers, the viscosity modifier, the machine-made sand and the milling material, so that the problems that the existing self-compacting concrete is insufficient in impact resistance, the rubber component easily floats upwards, and greenization and high performance are difficult to consider at the same time are solved.

This invention relates to the field of deep foundation pit support construction technology, specifically a nested support construction process for deep foundation pit elevator shafts and sump pits. It solves the problem that traditional caisson waterproofing technology is prone to failure due to pit wall collapse in highly permeable gravel strata, making it difficult to create stable construction conditions. The process includes a steel caisson support structure, within which a steel caisson waterproofing structure is nested. This steel caisson waterproofing structure is used in conjunction with the steel caisson support structure for nested construction. This invention, through the nested cooperation of the steel caisson support structure and the steel caisson waterproofing structure, and the injection of a self-compacting concrete filling layer, achieves an integrated support and waterproofing effect during construction. It creates a stable, dry, and enclosed working space in easily collapsible, highly permeable strata, solving the problem of failure of traditional single waterproofing technology and creating safe and reliable conditions for subsequent structural construction.

The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a self-compacting rock-fill concrete dam body construction method which comprises the following steps: rock-fill body construction: screening out rock-fill materials with the particle size of not less than 300mm, and conveying the rock-fill materials to a foundation surface in a bin to form rock-fill bodies with gaps; self-compacting concrete body construction is conducted, specifically, self-compacting concrete is pumped to the upper portion of the rockfill body, the self-compacting concrete flows to fill gaps between the rockfill materials, and the self-compacting concrete is solidified and hardened into a self-compacting concrete body 3; the particle size of coarse aggregate in the self-compacting concrete is not larger than 20 mm, and the content of needle-sheet-shaped particles is not larger than 8%. According to the method, the particle size of the rockfill material is limited, and the particle size of coarse aggregate and the content of needle-sheet-shaped particles in the self-compacting concrete are limited; the self-compacting concrete can be fully filled into gaps between dam bodies of rockfill materials, so that the compactness of the dam bodies is improved, the risk of dam body engineering structure damage is reduced, and the construction quality of the dam bodies is improved.

The utility model provides a repairing system for corrosion of a photovoltaic concrete pile head, and relates to the field of photovoltaic concrete piles, the repairing system comprises a self-compacting concrete layer, a concrete anti-corrosion coating and a plurality of blocking ring pieces prefabricated and formed by UHPC materials; the segmented ring sheets and the assembled cylindrical structure integrate the advantages and characteristics of UHPC materials, and have high strength, high toughness, high impermeability, freeze-thaw resistance, chemical erosion resistance and impact resistance; a plurality of block ring pieces prefabricated and formed by UHPC materials are spliced on the outer side of a concrete pile head to be repaired on site to form a cylindrical structure, preferably, the block ring pieces are made into semicircular ring pieces, and two pieces can be spliced into the cylindrical structure, so that the construction difficulty is effectively reduced, the splicing is rapid, and the operation is simple; self-compacting concrete slurry is poured into a filling cavity gap between the cylindrical structure and the to-be-repaired concrete pile head, the slurry is a finished product prefabricated material, and the quality of cast-in-place self-compacting concrete is ensured through field construction; in addition, the concrete anticorrosive coating is coated outside the cylindrical structure made of the UHPC material, so that the durability of the structure is further enhanced.

This invention discloses a self-compacting concrete pouring device and method for slab track, belonging to the field of slab track construction technology. It includes a concrete hopper with a cylinder connected to its lower end. The cylinder is equipped with an opening and closing mechanism, which comprises an elastic rubber cylinder and a metal elastic strip sleeved on its outer side. A motor drives the metal elastic strip to move around the cylinder, achieving precise adjustment of the opening degree of the elastic rubber cylinder's inner cavity, thereby controlling the concrete discharge flow rate. A scraping mechanism is also provided inside the concrete hopper. During the reciprocating opening and closing process, the scraping mechanism is driven by a transmission mechanism to rotate stepwise along the inner wall of the hopper, automatically scraping away residual concrete. This invention achieves precise electric control of the concrete flow rate and simultaneously completes automatic cleaning of the inner wall during the discharge process, effectively improving pouring quality and construction efficiency while reducing manual labor intensity.

The utility model provides a low-carbon self-compacting concrete deformation monitoring device, which comprises a supporting base plate, a working table, a concrete block supporting table, a positioning support plate, an extension table, a pressing push rod, a pressing seat, a detection structure and a concrete block, and is characterized in that the working table is fixedly arranged on the surface of the supporting base plate, and the concrete block supporting table is fixedly arranged on the surface of the working table; the positioning supporting plate is fixedly mounted at the top of the concrete block supporting table; the extending tables are fixedly installed at the two ends of the workbench, the downward pressing push rods are fixedly installed on the surfaces of the extending tables, and the downward pressing bases are fixedly installed on the downward pressing push rods. The detection structure is fixedly mounted on the extension table, and the concrete block is placed on the positioning supporting plate; due to the arrangement of the workbench and the detection structure, three-point testing and four-point testing can be carried out at the same time, data generated by testing can be collected in time, and concrete blocks can be stably placed.

A track plate shape and position real-time monitoring and early warning device for a high-speed rail CRTSIII type plate-type ballastless track comprises a track plate pressing facility, a prestress track plate, a self-compacting concrete filling layer and a base plate and further comprises a sensing device and a fixing device, and the sensing device comprises a track plate displacement sensor and a track plate pressing force sensor. The track plate displacement sensor is installed on the fixing device, and the track plate pressing force sensor is installed on a track plate pressing facility. The track plate displacement sensor and the track plate pressing force sensor carry out early warning in advance by sensing displacement and pressure changes generated in the construction process of the prestressed track plate, the pressing force and displacement data of the track plate can be monitored in real time in the construction process of a track plate filling layer, and the construction efficiency of the track plate filling layer is improved. And wireless transmission and real-time display of data are realized, and timely early warning in the construction process of the high-speed rail track board is further realized.

The invention discloses a modified material for improving construction robustness of a self-compacting concrete mixture as well as a preparation method and application of the modified material, and belongs to the technical field of building materials. The modified material comprises the following components in percentage by mass: 60%-70% of a composite mineral admixture, 15%-20% of zeolite powder, 12%-15.5% of nano calcium carbonate, 0.5%-1% of lignin fibers and 2%-4% of an organic rheology modifier. The modified material for improving the construction robustness of the self-compacting concrete mixture disclosed by the invention can effectively improve the segregation resistance and the water retention capacity of the self-compacting concrete mixture and improve the construction robustness of the self-compacting concrete mixture; the construction performance of the self-compacting concrete mixture can be kept stable under the condition that the water content of the raw materials fluctuates to a certain extent, so that the construction quality of the concrete is guaranteed, and important application value is achieved.

The utility model relates to the technical field of concrete measurement, in particular to a self-compacting concrete self-shrinkage measuring device which comprises a support, a sliding rail is fixedly connected to the inner side of the support, a sliding block is movably connected to the interior of the sliding rail, fixing cylinders are fixedly connected to the inner side of the sliding rail, a steel box is placed between the fixing cylinders, and the steel box is fixedly connected to the inner side of the support. And telescopic devices are fixedly connected to the two sides of the interior of the support correspondingly, and laser distance measuring sensors are fixedly connected to the inner sides of the sliding blocks and the lower ends of the telescopic devices correspondingly. Compared with the prior art, by arranging the sliding rail, the sliding block, the steel box and the telescopic device, the self-shrinkage amount of the upper side, the lower side, the left side, the right side, the front side and the rear side of the self-compacting concrete test piece can be measured at the same time, the measurement positions are comprehensive, and the overall shrinkage situation of the self-compacting concrete test piece can be reflected; therefore, the self-shrinkage amount of the self-compacting concrete can be accurately measured, and the measurement precision is improved.

The invention discloses a viscosity modified material for keeping the homogeneity of self-compacting concrete, a preparation method and application. The material comprises the following components in parts by mass: fly ash, slag powder, metakaolin, cellulose ether, limestone powder, zeolite powder, an air entraining agent, a functional component A and a functional component B, wherein the functional component A is prepared by compounding and drying nano silica fume, modified carbon nanotubes subjected to ultrasonic dispersion by sodium dodecyl benzene sulfonate / absolute ethyl alcohol and tungsten disulfide subjected to activation-silanization-polycarboxylic acid modification treatment, and the functional component B is prepared by shearing and uniformly mixing magnesium oxide and a calcium expanding agent at a high speed. The material can improve the viscosity, delay segregation and bleeding and reduce the water use sensitivity under the condition that the yield stress is not obviously improved, meanwhile, the early strength development is promoted, the volume stability is improved, and the durability such as chloride ion permeation resistance is improved, so that the homogeneity and quality consistency of a component in the pouring process and after hardening are guaranteed.

The application discloses an additive for high self-compacting performance concrete of a rock-fill dam and a preparation method thereof, and belongs to the technical field of concrete additives. The additive for high self-compacting performance concrete of the rock-fill dam provided by the application comprises the following raw materials in parts by weight: dispersing component A 550-600 parts, water-retaining and self-maintaining component B 60-100 parts, enhancing component C 100-140 parts, shrinkage-reducing component D 30-60 parts, anti-permeation component E 100-150 parts and water 0-110 parts. The additive for high self-compacting performance concrete of the rock-fill dam provided by the application can significantly improve the working performance, early and later mechanical properties and durability (anti-shrinkage and anti-permeation) of the high self-compacting concrete.

A system for testing the filling and flow capacity of self-compacting concrete (SCC), consisting of: a filling box with a volume of approximately 5.3 liters; Steel bars arranged horizontally and vertically inside the filling box to simulate reinforcement obstacles; a settling cone arranged in an inverted position for introducing SCC into the filling box; a horizontal closure configured for the controlled release of SCC; the time SCC needs to fill the box is measured as an indicator of its filling and throughput capacity.

The utility model relates to the technical field of power transformation framework foundations, in particular to a power transformation framework steel pipe column insertion type foundation. The plug-in foundation comprises a framework foundation arranged above the cushion layer, and a cup opening is formed in the framework foundation; a plurality of embedded anchor bolts are arranged in the framework foundation, and two semicircular ring plates are symmetrically mounted on the framework foundation through the embedded anchor bolts; self-compacting concrete used for wrapping the root of the connecting framework steel pipe column is poured in the cup opening. The problem that a framework steel pipe column and concrete in a cup opening can be pulled out together is solved, a framework foundation and a semicircular annular plate can be connected through pre-embedded anchor bolts, and through cooperation of arrangement of an inner transverse partition plate, chiseling of the inner wall of the cup opening, arrangement of an anti-shear stud, welding of a steel bar ring and pouring of self-compacting concrete, the structure is simple, and construction is convenient. The function that the framework steel pipe column, the concrete in the cup opening and the framework foundation are stressed cooperatively can be achieved, the framework steel pipe column can be prevented from sliding, the risk that the framework steel pipe column is pulled out is reduced, and the safety of the column base joint is improved.

The utility model discloses a sealing structure for a discharge port of a hanging tank, relates to the technical field of concrete hanging tanks, and aims to solve the problem that high-flow-state self-compacting concrete leaks from the discharge port in the hanging tank transportation process. The sealing structure comprises a soft annular taper sleeve sleeved on the discharge port of the hanging pot, the soft annular taper sleeve is sleeved on the discharge port of the hanging pot through an insertion cavity at the top, and a sealing washer is formed at the bottom of the discharge port of the hanging pot, so that a gap is prevented from being generated between the discharge port and the radial gate. In order to prevent relative sliding, an internal fixing piece and an external fixing piece are further structurally designed. In addition, the arc door gap sealing strip integrally formed with the soft annular taper sleeve is arranged at the bottom of the soft annular taper sleeve, and concrete is further prevented from leaking from the split arc door gap. According to the sealing structure, the sealing performance of the discharging port of the hanging tank is effectively improved, the material leakage phenomenon is reduced, and the sealing structure is suitable for transportation and pouring of high-flow-state self-compacting concrete.

The application discloses a special-shaped column formwork erecting device and a concrete pouring construction method. The device comprises a mounting piece and a plurality of groups of formworks. A vertical I-beam and a horizontal steel enclosing beam combined reinforcing structure is adopted, and a uniformly distributed threaded pull rod is used to realize circumferential balanced fastening. Meanwhile, through force balance control, local pull rod stress concentration is avoided, and bulging and bursting of the formwork is effectively prevented. The problems of uneven stress and easy deviation of the formwork in the traditional reinforcing mode are solved. The support piece adopts a telescopic support rod combined with an extension rod, and a spherical hinge connector is used to realize 360-degree support angle adjustment. The support piece can adapt to the support requirements of different heights and different slope angle of the inverted trapezoidal column. Through the independent support of different surfaces, precise positioning and assembling technology, and the side pouring technology of the self-compacting concrete through the pump pipe connector, continuous and efficient pouring under the condition of free vibration is realized, and the free falling height and flow state distribution of the concrete are effectively controlled.

This invention relates to a SCC mix design method and system based on the shear strength theory of cement paste. Its core lies in establishing a cement paste shear strength prediction model. This model quantitatively evaluates the shear strength of the cement paste under a proposed mix proportion and compares it with a pre-determined reasonable range. Then, through iterative adjustments to the cementitious material composition and water-cement ratio, the shear strength of the cement paste falls within the target range, thereby simultaneously optimizing the paste rheology and determining the final mix proportion. This invention achieves complete quantitative design from aggregate to paste, economically and efficiently preventing SCC segregation and maximizing the use of auxiliary cementitious materials to reduce the cost of self-compacting concrete.

The invention relates to the technical field of ballastless track construction processes, in particular to a self-compacting concrete construction process for a ballastless track. Comprising the following steps: S1, carrying out a manufacturability test and construction preparation; s2, edge sealing of the track plate; s3, track board pretreatment; s4, concrete stirring and transportation; s5, concrete pouring construction; s6, performing post-perfusion treatment; s7, maintenance and form removal are conducted; after the specified strength is reached, the formwork and the track plate are removed, and the geotechnical cloth is cut off after the formwork is removed; s8, quality inspection, wherein the thickness, the filling degree and the surface state are checked and accepted, and it is ensured that no bubbles exceed the standard, and no cavities and pitted surfaces exist; the problems of track plate displacement, concrete bubble retention and quality fluctuation are effectively solved, and the method has the advantages that the track plate positioning precision is improved, concrete bubble retention is reduced, and the construction quality stability is improved.

The invention discloses self-compacting concrete with synergistically optimized fluidity and volume stability, and belongs to the technical field of concrete materials, the self-compacting concrete is prepared from the following components by weight: 834-849 parts of coarse aggregate; 950 to 968 parts of artificial sand; 322 to 345 parts of ordinary Portland cement; 142 to 150 parts of water; 55 to 75 parts of modified hollow ceramic microbeads; 14 to 18 parts of an expanding agent; 5 to 9 parts of a super absorbent resin-montmorillonite composite material; and 5-11 parts of a water reducing agent. According to the self-compacting concrete disclosed by the embodiment of the invention, the contradiction between the fluidity and the volume stability can be fundamentally coordinated, and the shrinkage deformation is remarkably reduced while the excellent self-compacting performance is ensured, so that the self-compacting concrete is suitable for narrow space lining projects such as water delivery tunnels and the like which have extremely high requirements on structural integrity and long-term safety.

A novel ballastless track for high-speed lines, characterized in that it comprises a composite substructure, a rail plate and two rails, wherein the two rails are laid on the top of the rail plate and position fixing bores are formed in the central part of the rail plate; the composite substructure consists of a base plate and a self-compacting concrete (SCC) layer arranged on the top of the base plate, wherein the central top of the SCC layer has projections that fit into the position fixing bores.

Provided are a polyhydroxy aromatic intermediate, preparation thereof and use thereof in a polycondensate water-reducer with branched side chains. The polycondensate water-reducer with branched side chains has a branched side chain structure which provides a stronger steric hindrance. The synergistic effect of the branched side chains and the rigid skeleton of the aromatic ring greatly improves the water-reducing ability. Especially under a condition of low water / cement ratio, the improvement in water-reducing ability is more obvious. The branched polyether side chain is more conducive to the formation of a thicker water film layer, which has an obvious viscosity reduction effect. The conformation of the branched polyether side chain is less affected by different ionic environments in the pore solution in cement, and thus has a stronger adaptability to various raw materials. The water-reducer is suitable for the preparation of high-strength concrete, self-compacting concrete and concrete with low water-to-binder ratio and high volume of mineral admixtures, especially for the preparation of concrete containing machine-made sand.

The invention discloses a method for predicting compression resistance of self-adaptive shrinkage compensation self-compacting concrete, and belongs to the technical field of building materials. The method comprises the steps of firstly collecting environment and raw material data, and extracting key parameters through feature engineering; then constructing an integrated learning prediction model fusing a support vector machine and an adaptive lifting algorithm; finally, the mixing amount of intelligent materials such as a water-retaining agent and a shrinkage reducing agent is dynamically optimized based on the real-time environmental parameters, and self-adaptive design of the mix proportion is achieved. The method can accurately predict the compressive strength and the working performance of the concrete in different environments, effectively coordinate the mechanical properties and the working performance, and significantly reduce the test period and the void risk.

The present application provides a kind of heap slag self-leveling slag collecting pit and construction method, the pit bottom groove is equipped in the slag collecting pit, the size of the pit bottom groove is matched with the volume of the broken slag generated by the rock plug body blasting, and the opening edge of the pit bottom groove is embedded with pumping concrete pump pipe.The slag collecting pit construction method comprises the following steps: S1. making rock plug body blasting hydraulic model;S2. run the model, and get simulated slag heap after blasting;S3. according to the size parameters of the simulated slag heap, set the pit bottom groove in the slag collecting pit;S4. embed the pumping concrete pump pipe at the opening edge of the pit bottom groove;S5. the rock plug body is blasted, and the obtained slag heap is backfilled into the pit bottom groove;S6. by the embedded pumping concrete pump pipe, self-compacting concrete is poured on the surface of the slag heap, which solves the technical problem of underwater slag heap not easy to transport and clean in the prior art.

The invention belongs to the technical field of bridge construction, and particularly relates to a deepwater large-span cable-stayed bridge composite construction method. The method comprises the following steps: firstly, scanning a riverbed through a multi-beam depth finder to generate a three-dimensional geologic model, inputting a tide load spectrum and material mechanics parameters on a BIM platform, simulating open caisson structure deformation and marking a fault zone risk area; after the steel open caisson is prefabricated section by section, a pressure-resistant sealing magnetic levitation module and a hydraulic jack are integrated on the outer wall of the open caisson, a three-dimensional laser scanner is installed on the top, and a dual-mode deviation rectifying system is formed through a water pressure sealing test; during sinking, laser-sonar-inertial navigation multi-source fusion positioning is adopted, the sinking speed is controlled, and collaborative deviation adjustment is achieved through high-frequency fine adjustment of a magnetic levitation module and anchoring deviation correction of a hydraulic jack; a multi-degree-of-freedom mechanical arm is matched with an inert gas local drying cabin, and photoelectric positioning layering is combined to complete welding of the steel jacket box; self-compacting concrete is poured on the bearing platform, temperature is controlled in a zoned mode through pre-buried circulating water pipes and electromagnetic induction heating, and the temperature gradient is monitored in real time through optical fiber sensors; and the problems of structural displacement, welding deformation and concrete temperature overrun are corrected in real time through the sensor network in the whole cycle. The problems of open caisson deflection control, underwater welding sealing failure and mass concrete crack in the deepwater environment are solved, and the construction precision and the structural safety are remarkably improved.

The utility model relates to the technical field of transfer equipment, in particular to a self-compacting concrete anti-segregation transfer pouring device which comprises a machine frame, a container, a stirring mechanism, a weight detector, a material blocking assembly and a control cabinet. The weight detector is arranged on the upper support to detect the weight applied by the upper support, the material blocking assembly can close or open the material falling opening, the control cabinet is connected with the material blocking assembly and the weight detector and can control the material blocking assembly and the weight detector to be in linkage, and therefore the control cabinet can control the material blocking assembly to close or open the material falling opening according to a detection structure of the weight detector. Therefore, automatic quantitative blanking is achieved, and convenience and high efficiency are achieved.

The utility model relates to the technical field of concrete transfer equipment, in particular to a self-compacting concrete intelligent repairing and pouring device which comprises a main container and an auxiliary container, the main container is used for containing self-compacting concrete materials, and the auxiliary container is used for containing concrete additives. And the material conveying assembly is arranged between the auxiliary container and the main container and used for conveying the concrete additive in the auxiliary container into the main container. According to the intelligent repairing and pouring device for the self-compacting concrete, the concrete additive in the auxiliary container can be conveyed into the main container before pouring; the performance of the self-compacting concrete in the main container is recovered, so that the construction quality is guaranteed.

The utility model discloses a complex steel bar node structure for steel reinforced concrete multi-beam intersection, which relates to the technical field of constructional engineering and comprises a steel reinforced concrete main beam, a mountain-shaped secondary beam, a connecting plate welded on an I-shaped steel rib web of the main beam, a haunching structure and self-compacting concrete. Longitudinal bars of the mountain-shaped secondary beams are regularly extended or bent into closed stirrups at intervals, anti-torsion steel bars are welded and fixed through connecting plate through holes, displacement of the steel bars of the haunching structures is adjusted through damping sliding grooves, self-compacting concrete is filled in a node core area, and common concrete is continuously poured on the periphery of the node core area. According to the structure, by optimizing steel bar arrangement, connecting plate standardized welding and layered pouring processes, the problems of steel bar conflict, complex welding and non-compact concrete of a traditional multi-beam intersection joint are solved, and the structure is suitable for a large-span complex building structure.