CN220100774U - Reinforced concrete structure reinforcing structure - Google Patents

Abstract

The utility model relates to the technical field of reinforced concrete structure reinforcement, in particular to a reinforced concrete structure reinforcement structure. The novel steel bar frame comprises a frame beam, wherein newly-increased longitudinal bars are connected to the node positions of the frame beam in a penetrating manner, steel bar hooping is tightened through U-shaped between the newly-increased longitudinal bars, a U-shaped screw is connected to the outer surface of the newly-increased longitudinal bars, the U-shaped screw is in threaded connection with thick flat steel, and the thick flat steel is in butt joint with the frame beam. The U-shaped tightening steel bars are connected with the newly added longitudinal bars through steel wires or by adopting a welding mode, the U-shaped screw rods penetrate through preset holes in the frame beams, and the U-shaped tightening steel bars are welded or by adopting steel wires.

Description

Reinforced concrete structure reinforcing structure

Technical Field

The utility model relates to the technical field of reinforced concrete structure reinforcement, in particular to a reinforced concrete structure reinforcement structure.

Background

The building reinforcement is to reinforce the building by using carbon fiber, sticky steel and high-pressure grouting. The technology is widely used for design change, reinforcement and change projects such as beams, columns, cantilever beams, plates and the like, and is a connecting technology for anchoring and utilizing the effect of structural adhesive after reinforcing steel bars in the building structure seismic strengthening project. Is the best choice for the application of the reinforcement of the structural reinforcement and the heavy load fastening. In the construction of the reinforced concrete structure, the steel bar for adjusting the plate and beam structures is prefabricated Liang Xiufu for planting the steel bars. And (3) anchoring the advertisement board of the embedded part of the curtain wall, installing the embedded bar for anchoring mechanical equipment, and the like. And (3) anchoring rock brickwork and the like, and hanging curtain walls by stone. Stone bonding, anchoring and supporting the roof and wall parts of the mine hole; anchoring of railway rails, various anchoring of engineering such as highway bridge tunnel subways of water conservancy facilities wharf, and the like.

At present, steel bars or steel plates are adopted for hooping when reinforcing beam column joints, but the steel plates and the steel bars do not pass through beam columns when hooping, the easy reinforcing is broken away, the reinforcing is difficult to be carried out, the beam column joints are key to structural earthquake resistance in reinforced concrete frame structures, the principles of strong column weak beams, strong shearing weak bending and strong joint if components are adopted in structural design, and therefore, the reinforcing of the beam column joints is the important aspect of the whole building earthquake resistance reinforcing in the existing building reconstruction process. Aiming at the problems, a reinforced concrete frame structure reinforcing node is provided.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a reinforced concrete structure reinforcement structure.

The utility model adopts the following technical scheme for realizing the purposes:

the utility model provides a reinforced concrete structure reinforcing structure, includes the frame roof beam, frame roof beam node position cross-under has newly-increased longitudinal reinforcement, newly-increased longitudinal reinforcement is between the stirrup through U type binding steel, newly-increased longitudinal reinforcement external surface connection has U type screw rod, U type screw rod end threaded connection has the nut, the nut with thick band steel supports tightly, U type screw rod and thick band steel threaded connection, thick band steel with frame roof beam butt.

Preferably, the U-shaped tightening steel bars are connected with the newly-added longitudinal bars through steel wire tightening or welding.

Preferably, the U-shaped screw rod passes through a preset hole on the frame beam.

Preferably, the U-shaped tightening steel bars are welded or tightened by steel wires.

Compared with the prior art, the utility model has the beneficial effects that:

the high-ductility concrete is combined with the reinforcement of the embedded bars, plays roles in connecting, reinforcing and reinforcing the new and old concrete member nodes, and improves the bearing capacity, ductility and cracking resistance of the beam column node core area and the overall performance of the core reinforcing area and the cooperative stress of the original structure.

Drawings

FIG. 1 is a schematic view of a middle node reinforcement structure according to the present utility model;

FIG. 2 is a schematic left-hand view of FIG. 1;

FIG. 3 is a schematic view of an edge node reinforcement structure according to the present utility model.

In the figure: 1-frame beam, 2-newly added longitudinal bars, 3-U-shaped tightening bars, 4-U-shaped screw rods and 5-thick flat steel.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments so as to more completely understand the technical scheme of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other equivalent embodiments, which are apparent to those skilled in the art based on the embodiments of the present utility model without departing from the scope of the utility model, are intended to be included in the scope of the present utility model.

As shown in fig. 1-3, a reinforced concrete structure strengthens structure, when the limit node is consolidated, including frame roof beam 1, the joint position cross-under of frame roof beam 1 has newly-increased longitudinal reinforcement 2, through 3 stirrups of U type tightening reinforcing bar between the newly-increased longitudinal reinforcement 2, during the well node is consolidated, including frame roof beam 1, the joint position cross-under of frame roof beam 1 has newly-increased longitudinal reinforcement 2, newly-increased longitudinal reinforcement 2 surface is connected with U type screw rod 4, U type screw rod 4 and thick band steel 5 threaded connection, the terminal threaded connection of U type screw rod 4 has the nut, the nut with thick band steel 5 supports tightly, thick band steel 5 with frame roof beam 1 butt.

The U-shaped tightening steel bars 3 are connected with the newly added longitudinal bars 2 through steel wire tightening or welding.

The U-shaped screw 4 penetrates through a preset hole in the frame beam 1.

The U-shaped tightening steel bars 3 are welded or tightened by steel wires.

Adopting tools such as electric hammers to chisel concrete in beam column core area, chisel removing carbonized concrete layer, processing the reinforcing bar size according to the beam column core size in reinforced area, processing into U style of calligraphy stirrup according to the post size by horizontal reinforcing bar, 2U style of calligraphy stirrups enclose into a whole, and reinforcing bar specification, model, diameter, interval are according to the design requirement, are simultaneously according to the drawing design at beam column node according to the reinforcing bar interval drilling in the roof beam side, and the aperture should be 1.1-1.2 times of reinforcing bar diameter, sweeps the downthehole clean after the drilling is accomplished. Then injecting structural adhesive into the holes, simultaneously coating the structural adhesive on the implanted steel bars, then inserting U-shaped stirrups into the holes to finish the bar planting, and finally smearing high-ductility concrete layer by layer on the surfaces of the steel bars. Meanwhile, the high-ductility concrete is combined with the reinforcement of the planted bars, the connection, reinforcement and reinforcement effects are achieved on the new and old concrete member nodes, and the bearing capacity, ductility and cracking resistance of the beam column node core area and the overall performance of the core reinforcement area and the original structure under cooperative stress are improved.

Before construction, the digital model is managed to the reinforcing node by utilizing the BIM technology, and before reinforcement, the reinforcing quality is improved, and the potential safety hazard of construction is reduced.

The working flow of the utility model is as follows: 1 column node bar planting reinforcement operation key point

1) Preparation for construction

a) The preparation work before construction should be done for the used reinforcing steel bars, adhesive glue, machines and tools, etc.

b) And checking whether the concrete surface of the planted bar position is good, and if the concrete defect exists, repairing the defect and planting bars at the rear.

c) And detecting the distribution condition of the steel bars of the original structure by using a steel bar detector, and marking by using red paint. The original steel bar position should be avoided when the steel bar is planted, so that the original steel bar is prevented from being damaged.

2) Hole site location

The operators comprehensively know the technical indexes such as the diameter, the depth, the position and the like of the drilling holes. And on site, unit measuring staff puts the bar planting position into the bar planting position according to the horizontal control line, the elevation control line and the drawing. The original structure steel bar can be possibly blocked during the positioning operation of the steel bar planting hole, in order to control the accurate positioning of the steel bar planting, the original structure concrete protection layer can be picked and chiseled to expose the original structure steel bar, or the original structure steel bar position can be determined by utilizing a steel bar detector, so that the steel bar planting hole position can be determined, and the forming quality of a new structure can be ensured.

3) Drilling holes

The operation of bar planting and drilling selects a proper drilling machine according to the aperture and the operation environment, and selects a drill rod with corresponding matched specification according to the aperture of the bar planting. Generally, the diameter of the drill rod is 4 mm-6 mm larger than that of the steel bar, and the diameter of the hole is in accordance with the design requirement. The drill rod length should be sufficient to meet the depth of the borehole. When drilling, the power supply of the electric hammer is firstly connected to test operation, and whether the rotation direction of the drill rod is correct or not is checked. The operation ensures that the force is applied vertically. When the drilling position is applied to the calibrated hole site, the drilling position can be adjusted slightly to avoid the reinforcing steel bars after the original structural reinforcing steel bars are approved by a design unit. The depth of the borehole must meet design requirements.

The bore diameter of the drill hole is not less than d+4mm, the depth of the drill hole is not less than L+15d, and the size of the component in the implantation direction is not more than 30mm, wherein d is the diameter of the reinforcing steel bar, L is the implantation depth of the reinforcing steel bar, and a percussion drill is adopted. The drill depths are shown in Table 5.2.1-1 below.

TABLE 5.2.1-1 drilling annotation table

4) Clear hole (interface treatment)

a) The holes after forming holes should thoroughly remove dust and fragments in the holes, so as to avoid the influence of the isolation effect of the dust and fragments on the bonding effect of the adhesive.

Firstly, cleaning holes by using a hairbrush after the holes of the planted bars are drilled; and cleaning dust in the hole by using clean oil-free compressed air or a manual air blowing cylinder, and repeatedly treating the hole for not less than 3 times until no dust and fragments exist. If oil stains exist at the drilling positions, cleaning the hole wall by dipping the clean cotton yarn in acetone so as to ensure that the hole wall and the adhesive can have good bonding effect.

And b, the dryness of the wall of the reinforced hole meets the requirement of the specification of the adhesive product. The requirement that the concrete member is required to be dried when the bar planting holes are dried is met, otherwise, a hot air blower is used for blowing hot air into the holes for drying treatment, so that the drying of the holes before the curing of the adhesive is ensured, and the curing effect of the adhesive is ensured.

And c, the bar planting hole should be complete, and cracks and other local damages should not exist.

d, after the hole wall of the bar planting hole is cleaned, if the glue is not injected immediately, the hole is tightly plugged by using clean cotton yarn, so that dust and foreign matters are prevented from falling into pollution, and the protection is kept for later use.

5) Hole inspection

After the bar planting holes at the same position are finished, project department quality inspectors can carry out hidden acceptance with field units on site to confirm that the hole forming hole positions, the hole diameters, the hole depths and the interface treatment meet the requirements of qualified quality in construction quality acceptance specifications.

The waste holes are filled and compacted by using chemical anchoring glue or resin cement mortar with high strength grade.

6) Glue compounding

When the adhesive packaged by the automatic stirring injection cylinder is adopted, the construction of the bar planting should be operated according to the requirements of the product instruction. When the on-site-configured bar planting adhesive is adopted, the bar planting adhesive is strictly executed according to the proportion and the technological requirements specified by the product use specification, and special persons are arranged to take charge. The stirred glue solution has uniform color, no caking and no bubble generation. The stirring is preferably carried out in the same direction, so that air bubbles are prevented from being formed by air mixing.

When the adhesive is prepared, the preparation amount of the adhesive is determined according to the working environment temperature, and the dosage is not excessive each time, so that the construction and adhesive quality are not affected after the adhesive is deteriorated. During the stirring and using processes, the mixing of dust, oil, water and other impurities should be prevented, and the reinforcement construction should be completed according to the specified operable time. Generally, the bar planting adhesive should be prepared at present, the adhesive preparation amount is not more than 5kg each time, and the adhesive preparation is preferably completed within 30 minutes at one time. The adhesive which is obsolete is discarded.

7) Glue injection bar planting

The glue injection operation may be performed by an adhesive syringe or other method to fill the hole. The priming should not interfere with the air evacuation from the holes. The glue injection should be performed from inside to outside to ensure that the air in the hole is discharged and the glue injection is full. The pouring amount should be determined according to the instruction of the product, and about 2/3 of the pouring hole is generally taken, and a small amount of glue solution overflows from the pouring hole after the steel bar is implanted. And after the hole is filled with the adhesive, cleaning the overflowed excessive adhesive solution. The horizontal bar planting and the bar planting through holes should be supplemented or blocked by gaskets, and the situation of flowing of the external gum solution should be noted.

After the bar planting glue is injected, the steel bar is inserted immediately, and the steel bar is inserted while rotating clockwise, so that the steel bar is forced to push inwards, and the anchor bar is rotated appropriately so as to remove air in the glue until reaching a specified depth.

The time taken from the injection of the adhesive to the placement of the reinforcing bars should be less than the operational time specified in the product instructions. Otherwise, the steel bar is pulled out, and the ineffective adhesive is immediately removed; reworking according to the original working procedure.

The implanted steel bars must be aligned in the direction so that the gaps between the implanted steel bars and the walls of the holes are uniform. Before the adhesive is cured, the planted steel bars cannot be touched. When the embedded steel bar is necessary to be welded, the distance between the welding spot and the concrete surface of the base material is more than 15d, and the root of the bare part outside the embedded steel bar is wrapped by a wet towel during welding.

8) Curing and protection

The implanted rebar must not be disturbed before the adhesive cures. The independent or row of steel bars should be used as support to ensure the centering of the position, correct positioning and prevent the displacement caused by artificial influence. The implanted steel bars should be maintained statically, and finished products are protected. According to the specification of the product, the maintenance time is generally at least 1d according to the temperature condition of the construction environment. And after the adhesive is solidified and the on-site drawing bearing capacity is checked to be qualified, loading construction can be carried out.

2 high ductility concrete construction

1) Base layer treatment

The angle grinder or the steel wire brush is used for cleaning the residual sand ash and brick residue fragments on the structural surface, and then the structural surface is washed by a high-pressure water gun, so that the base layer is clean and has no looseness and reliable connection.

2) Stirring high-ductility concrete

High-ductility concrete construction mix ratio: in the on-site stirring process of the high-ductility concrete, the high-ductility concrete must be stirred strictly according to the construction proportion and the feeding sequence, and the stirring time is generally about 5-8 minutes, so that the uniform dispersion of the fibers and no caking are ensured. The construction proportion is shown in the following Table 5.2.1-2.

TABLE 5.2.1-2 high ductility concrete construction mix (masterbatch 40 kg/bag)

Feeding sequence: firstly, adding 90% of water, adding master batch in the stirring process, adding the rest 10% of water, stirring uniformly, then gradually adding the fiber, stirring for 3-5 minutes until the fiber is dispersed uniformly and does not agglomerate, and stopping stirring.

3) Pressing and plastering first layer of high-ductility concrete

And after the project department is checked and accepted to be qualified, pressing and plastering construction can be performed. Before the high-ductility concrete surface layer is pressed and smeared, the wall surface should be repeatedly watered and wetted, and the wall surface is pressed and smeared after being slightly dry. When the high-ductility concrete at the bottom layer is pressed and smeared, the thickness is not more than 15mm, and the later pressing and smeared process is performed before the earlier initial setting. When the joint between the inner wall and the outer wall is smeared, the joint should be continuously smeared, and a construction cold joint should not be left at the joint.

4) Pressing and wiping the second layer

The second press-plastering should be performed before the first initial setting. When in pressing and plastering, the indentation is eliminated to enable the wall surface to be horizontal and vertical, and the standard acceptance standard is achieved.

5) Maintenance and finished product protection

And (3) after the high-ductility concrete pouring of the beam column node is finished, curing within 12 hours after the surface layer is constructed, and curing for at least 7 days by adopting an electric sprayer, wherein the curing is carried out for at least 4 times per day. After curing, the cured product is handed to the responsible person in the next working procedure.

While the preferred embodiments of the utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the utility model, and the various changes are included in the scope of the utility model.

Claims (4)

1. A reinforced concrete structure reinforcing structure, characterized in that: including frame roof beam (1), frame roof beam (1) node position cross-under has newly-increased longitudinal reinforcement (2), newly-increased longitudinal reinforcement (2) are between through U type lacing bar (3) stirrups, newly-increased longitudinal reinforcement (2) external surface connection has U type screw rod (4), U type screw rod (4) and thick band steel (5) threaded connection, U type screw rod (4) terminal threaded connection has the nut, the nut with thick band steel (5) support tightly, thick band steel (5) with frame roof beam (1) butt.

2. A reinforced concrete structure reinforcing structure according to claim 1, wherein: the U-shaped tightening steel bars (3) are connected with the newly added longitudinal bars (2) through steel wire tightening or welding.

3. A reinforced concrete structure reinforcing structure according to claim 1, wherein: the U-shaped screw rod (4) penetrates through a preset hole in the frame beam (1).

4. A reinforced concrete structure reinforcing structure according to claim 2, wherein: the U-shaped tightening steel bars (3) are welded or tightened by steel wires.