CN110306830A - A kind of reinforcement structure for implantation and construction method of planting reinforcement - Google Patents

Abstract

The invention relates to the field of building construction, and provides a reinforced structure for implantation and a construction method thereof. The reinforcing bar structure for implanting includes a main reinforcing bar and 2 additional planting bars; one end of the 2 additional planting bars is arranged in the planting bar hole, and the other end is welded and fixed with the main bar; the main bar and the 2 The lower edge of the weld between the additional planting bars is at least 200mm away from the surface of the implanted structure. The construction method includes: S1, excavating anti-slip holes; S2, drilling reinforcement holes; S3, pouring reinforcement glue into the reinforcement holes; S4, welding and fixing the main reinforcement and 2 additional reinforcements to form a reinforcement structure ; The two additional planting bars are fixedly arranged in the planting bar holes; S5. Install a protection device to prevent the main steel bar and the additional planting bars from swinging and colliding until the planting bar glue is cured. The invention has the advantages of simple process operation, guaranteed construction quality, and can solve the problem that the hole diameter and hole depth of planting reinforcement do not meet the design requirements due to the difficulty of drilling in the densely reinforced area of nodes.

Description

A kind of reinforcement structure for implantation and construction method of planting reinforcement

technical field

The invention relates to the field of building construction, in particular to a steel bar structure for implantation and a construction method for planting bars.

Background technique

With the rapid development of the modern construction industry, due to factors such as changes in use functions or the need for expansion, the number of renovation and expansion projects of old buildings is also increasing, and there are many projects that are difficult to successfully complete with existing conventional construction techniques.

The so-called difficult-to-completion projects include building additions or rebuilding building structures on the original reinforced concrete structure. According to the corresponding design nodes and specification requirements, the connection between old and new structures usually adopts the chemical method of planting bars. Chemical rebar planting technology is a connection technology in which steel bars are post-anchored using the gripping force of structural rubber lock keys. It is the best choice for structural rebar reinforcement and heavy load fastening applications. The general construction method is as follows: first drill holes in the original structure concrete, and clean up the sundries in the holes; then inject high-strength planting glue, and then insert steel bars or profiles. After the glue is cured, the steel bars and the substrate are bonded together; finally Static maintenance is carried out to ensure that the connection of the old and new structures forms a reliable rigid node. Among them, the operation of drilling holes on the original structure has requirements for hole diameter and hole depth.

However, when drilling holes on the beam-column joints of the original structure for the purpose of building a new structure, since the original beam-column joints may have criss-crossed main bars and column head bent anchor bars, the original bars are densely intersected and misaligned, and it is difficult for the drill bit to effectively avoid the original beam-column joints. Where there are steel bars, the diameter and depth of the drilled holes cannot meet the design requirements.

Contents of the invention

The purpose of the present invention is to provide a steel bar structure for implantation, which is used to replace a thicker steel bar, including a main steel bar and 2 additional planting bars; one end of the 2 additional planting bars is arranged in the planting bar hole, and the other One end is welded and fixed to the main steel bar; the distance between the lower edge of the weld between the main steel bar and the two additional planting bars is at least 200mm from the surface of the implanted structure.

In the above-mentioned steel bar structure for implantation, the distance between the lower edge of the weld between the main steel bar and the two additional planting bars needs to be greater than or equal to 20d from the surface of the implanted structure, where d represents the diameter of the main steel bar .

In the aforementioned reinforcing bar structure for implantation, the two additional planting bars are respectively arranged on both sides of the main reinforcing bar.

In the above-mentioned steel bar structure for implantation, the bearing capacity of the two additional planting bars and the bearing capacity of the main steel bar conform to the principle of equal cross-section substitution.

In the above reinforcement structure for implantation, the length of the weld seam is greater than 5d, where d represents the diameter of the main reinforcement.

Another object of the present invention is to provide a planting bar construction method, comprising the following steps:

S1. Dig anti-slip holes on the top of the longitudinal main reinforcement;

S2, starting from the anti-slip hole, drilling a hole for planting reinforcement at the top of the longitudinal main reinforcement;

S3, pouring the reinforcement glue into the reinforcement hole;

S4, one end of the main steel bar is welded and fixed to the first ends of the two additional planting bars to form a steel bar structure; the second ends of the two additional planting bars are fixedly arranged in the planting bar holes;

S5. Install a protection device to prevent the main steel bar and the attached planting bar from swinging and colliding until the planting bar glue is cured.

In the above construction method for planting reinforcement, before step S1, it also includes chiseling away the concrete protection layer outside the longitudinal main reinforcement.

In the above construction method for planting bars, before step S1, it also includes calculating the diameter of the additional planting bar and calculating the corresponding depth and diameter of the planting bar hole according to the principle of equal cross-section substitution.

In the above construction method for planting bars, in step S2, the slope of the bar planting hole is less than 8°.

In the above construction method for planting bars, in step S2, use compressed air and a brush to clean the holes for planting bars, and clean them repeatedly for 3-5 times.

In the above construction method for planting bars, after step S2, pour planting glue into the holes for planting bars to 2/3 of the hole depth.

In the above construction method for planting bars, in step S4, the second ends of the two additional planting bars are repeatedly pulled out and inserted until the additional planting bars are implanted into the bottom of the hole.

In the above construction method for planting bars, in step S4, the steel bar structure is firstly formed by welding, and then the steel bar structure is fixed in the bar planting hole.

In the above-mentioned planting bar construction method, in step S4, the second ends of the two additional planting bars are first arranged in the planting bar holes, and then the steel bar structure is formed by welding.

In the above construction method of planting bars, before welding, the root of the exposed part of the additional planting bars is wrapped with a wet cloth, and the wet cloth is soaked with cold water or ice water in advance.

Compared with the prior art, the technical solution of the present invention is based on the principle of equal cross-section replacement, using additional planting bars with smaller diameters to replace the calculated standard planting bars, and then fixing the newly added bars by welding and gluing. steel bars. This method is relatively simple in terms of process operation, and the construction quality control is relatively guaranteed. It can solve the problem that the hole diameter and hole depth of the planting reinforcement do not meet the design requirements due to the difficulty of drilling in the densely reinforced areas of the nodes.

Description of drawings

Fig. 1 is the schematic diagram of an embodiment of implantation steel bar structure among the present invention;

Fig. 2 is a schematic diagram of the application of Fig. 1 .

Detailed ways

In order to make the purpose and features of the present invention more comprehensible, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings. However, the present invention can be implemented in different forms and should not be limited to the described embodiments. Moreover, in the case of no conflict, the embodiments in the present application and the features in the embodiments are allowed to be combined or replaced with each other. The advantages and features of the present invention will become clearer in conjunction with the following descriptions.

It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

It should also be stated that the purpose of numbering the steps in the present invention is to facilitate reference, not to limit the sequence. For individual steps that need to be emphasized in order, special instructions will be given in special text in the text.

Please refer to FIG. 1 and FIG. 2 , this embodiment proposes a steel bar structure for implantation, and FIG. 1 shows a schematic diagram of the steel bar structure for implantation. The reinforcing bar structure for implanting includes a main steel bar 3 and 2 additional planting bars 4. One end (defined as the second end) of the 2 additional planting bars 4 is arranged in the planting bar hole 6 (see Fig. 2 ), The other end (defined as the first end) is welded and fixed with the main steel bar 3, that is to say, a main steel bar 3 and two additional planting bars 4 are fixed together by welding to form a reliable rigid node, thereby "manufacturing" a Root new rebar. Preferably, the two additional planting bars are respectively located on both sides of the main steel bar. Then re-pour cement, concrete, etc. outside this "new" steel bar to re-form building structures such as columns and walls.

In order to ensure the strength (comprising shearing force, tensile stress, etc.) The diameter of the main bar 3.

In order to ensure the strength of the final fixed node of the implanted steel bar structure, for the implanted steel bar structure that is planted first and then welded, the distance from the lower edge of the weld 5 to the surface of the implanted structure is at least 200mm. The surface of the implanted structure as used herein refers to the surface of the building structure that has been recast with cement, concrete, or the like. Further, considering the diameters of the additional planting bar 4 and the main steel bar 3 , the weld 5 needs to further meet the requirement that the distance between the lower edge and the surface of the implanted structure is greater than or equal to 20d, where d is the diameter of the main steel bar 3 . That is, the distance between the lower edge of the weld 5 and the surface of the implanted structure must meet the requirements of greater than 200mm and greater than or equal to 20d.

Further, the total bearing capacity of the two additional planted bars is equivalent to the bearing capacity of one main steel bar 3 . Those skilled in the art can understand that the diameter of the main steel bar 3 is generally calculated according to the actual situation by using a calculation formula commonly used in the industry, and is a fixed value. Then, according to the common cross-section substitution principle in the industry, the diameters of the two additional planted bars whose total bearing capacity is equivalent to the main steel bar 3 can be calculated. Regarding the calculation process, there is not much explanation here.

Figure 2 is a schematic diagram of implanting the aforementioned reinforcement structure for implantation on a column. The construction party needs to lengthen the column on the basis of the original column 2. In the figure, the construction party has drilled two reinforcement holes 6 on the original column 2, and two main reinforcement bars 3 need to be implanted. According to the original design data, the diameter of the main steel bar 3 is 25mm, the aperture of the reinforcement hole 6 is 32mm, and the hole depth is 620mm. However, it was found in the course of implementation that the reinforcement structure inside the original column 2 was relatively complicated, and the reinforcement hole 6 could not be drilled according to the designed depth. According to the solution of the steel bar structure for implantation of the present invention, it is considered to adopt two additional planting bars 4 instead of one main steel bar 3 to be implanted in the planting bar hole 6 on site. According to the practical effect, the additional planting bar 4 can adopt a steel bar that is 1 to 2 specifications smaller than the main steel bar 3 . According to the principle of equal section substitution, two steel bars with a diameter of 20 mm are selected as the additional planting bar 4 in this embodiment. At this time, the depth of the corresponding reinforcement hole is 470mm, and the hole diameter is 25mm.

The reinforcement construction method of implanting the steel bar structure into the original column 2 includes the following steps:

S0, chiseling away the concrete protective layer on the upper surface of the original column 2.

S1. Find out the longitudinal main reinforcement, and use a chisel to dig an anti-skid hole on the top of the longitudinal main reinforcement, so as to avoid the drill bit from sliding during drilling, resulting in misoperation such as misalignment.

S2. Drill the reinforcement hole 6 according to the pre-calculated hole depth and hole diameter. Since most of the construction sites use percussion drills, the drilling is generally required to be perpendicular to the plane of the concrete member, and the inclination should not be greater than 8 degrees. And, when drilling the reinforcement hole, the progress should not be too fast, so as not to affect the strength of the concrete around the reinforcement hole 6 due to the heating of the drill.

S3, pouring the reinforcement glue into the reinforcement hole 6 . Since two additional planting bars 4 need to be inserted, the depth of glue filling is not easy to exceed 2/3 of the hole depth. Before pouring the rebar-planting glue, the rebar-planting hole 6 needs to be cleaned. Compressed air and a brush can be used to repeatedly clean the dust, oil and other impurities in the hole. Make sure that the hole wall is free of dust, oil and No organic impurities. The number of repeated cleanings is generally 3 to 5 times.

S4. One end of the main steel bar 3 is welded and fixed to the first ends of the two additional planting bars 4 to form a steel bar structure; the second ends of the two additional planting bars 4 are fixedly arranged in the planting bar holes. Since the rebar glue poured in step S3 generally has a relatively high concentration, it needs to be inserted by repeatedly pulling out and inserting until the second end of the additional rebar 4 is implanted into the bottom of the hole.

S5. Install a protection device to prevent the steel bar structure for implantation from swinging and colliding until the bar-planting glue is cured. At the same time, it is best to send someone to protect the scene.

S6. Re-pour building materials such as cement and concrete outside the reinforcement structure for implantation to form a newly added column 1 .

In fact, step S3 and step S4 are two construction steps intertwined with each other. Those skilled in the art can understand that, on the one hand, the two operations of drilling cleaning and welding can be carried out at the same time; on the other hand, due to the limitations of the site and tools, the main steel bars 3 and the additional planting bars 4 may not be welded in the open space Then it is transported to the top of the original column 2 for glue filling and fixing. Therefore, generally speaking, step S3 and step S4 may be a process of welding, glue filling and then inserting the second end, or a process of glue filling, inserting the second end and then welding.

In the latter process, in the process of welding the main steel bar 3 and the auxiliary planting bar 4, it is necessary to wrap the wet cloth at the root of the exposed part of the additional planting bar 4, that is, the part shown in the circle in Figure 2, and the wet cloth needs to be used in advance. Soak in cold or ice water.

The above-mentioned steel bar structure for implantation and the construction method of planting bars utilize the principle of equal cross-section substitution, and insert two smaller steel bars into the planting bar hole instead of one larger bar, so that the opening depth of the bar planting hole is Both the diameter and diameter can be reduced, which reduces the difficulty of drilling and planting bars in the densely populated areas of frame-column joints, and the process operation is relatively simple, and the construction quality control is relatively guaranteed. It provides a good solution for the renovation of old houses and house renovations. .

Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (15)

1. a kind of implantation bar construction, which is characterized in that including a main reinforcement and 2 additional bar plantings；2 additional plants Muscle one end is set in bar planting hole, and the other end is welded and fixed with the main reinforcement；

The lower edge distance of weld seam between the main reinforcement and 2 additional bar plantings is implanted body structure surface at least 200mm.

2. implantation bar construction as described in claim 1, which is characterized in that the main reinforcement and 2 additional bar plantings Between the lower edge distance of weld seam be implanted body structure surface also and need and be greater than or equal to 20d, wherein d indicates the diameter of the main reinforcement.

3. implantation bar construction as described in claim 1, which is characterized in that 2 additional bar plantings are respectively arranged at institute State the two sides of main reinforcement.

4. implantation bar construction as claimed in claim 1 or 2, which is characterized in that the bearing capacity of 2 additional bar plantings with The bearing capacity of the main reinforcement meets cross-section substitutivity principle.

5. implantation bar construction as claimed in claim 2, which is characterized in that the length of the weld seam is greater than 5d, wherein d table Show the diameter of the main reinforcement.

6. a kind of pore reinforced construction method, which comprises the steps of:

S1, anti-slip hole is dug at the top of lengthways main steel bar；

S2, since the anti-slip hole, at the top of the lengthways main steel bar bore bar planting hole；

Anchoring adhesive is perfused in hole in S3, Xiang Suoshu bar planting；

The first end of S4, one end of main reinforcement and 2 additional bar plantings are welded and fixed, and form a bar construction；2 additional plants The second end of muscle is fixedly installed in the bar planting hole；

S5, setting protective device, to prevent the main reinforcement and attached bar planting from waving and colliding with, until the bar planting adhesive curing.

7. pore reinforced construction method as claimed in claim 6, which is characterized in that further include cutting described indulge before step S1 Concrete cover to outside main reinforcement.

8. pore reinforced construction method as claimed in claim 6, which is characterized in that further include by cross-section generation before step S1 Principle is changed to calculate the diameter of the additional bar planting and calculate the corresponding depth in the bar planting hole and diameter.

9. pore reinforced construction method as claimed in claim 6, which is characterized in that in step s 2, the gradient in the bar planting hole is small In 8 °.

10. pore reinforced construction method as claimed in claim 6, which is characterized in that in step s 2, use compressed air and hair Brush clears up the bar planting hole, and cleans 3-5 times repeatedly.

11. pore reinforced construction method as claimed in claim 6, which is characterized in that after step S2, Xiang Suoshu bar planting is perfused in hole Anchoring adhesive is to the 2/3 of hole depth.

12. pore reinforced construction method as claimed in claim 6, which is characterized in that in step s 4,2 additional bar plantings Second end is using the method for pulling out, being inserted into repeatedly until the additional bar planting implant holes bottom.

13. pore reinforced construction method as claimed in claim 6, which is characterized in that in step s 4, first pass through described in welding formation Then the bar construction is fixed in the bar planting hole by bar construction.

14. pore reinforced construction method as claimed in claim 6, which is characterized in that in step s 4, first by described 2 additional plants The second end of muscle is set in the bar planting hole, then forms the bar construction by welding again.

15. pore reinforced construction method as claimed in claim 14, which is characterized in that before welding, in the additional exposed portion of bar planting Wet cloth is wrapped up in the root divided, and the wet cloth uses cold water or ice water to impregnate in advance.