Construction structure for replacing column with high-clearance lower joist

Abstract

The utility model discloses a construction structure for replacing a column with a high-clearance lower joist, which is characterized in that a diagonal bracing type supporting structure is arranged between a structural column and a structural beam in advance; the diagonal bracing type supporting structure comprises a column connecting plate fixed to the wall face of a structural column, a triangular plate assembly welded to the column connecting plate and an electric jack erected on the triangular plate assembly, the top end of the electric jack makes contact with the bottom wall of a structural beam, and prestress is provided through the electric jack to fasten and support the structural beam. In this way, after the binding steel bars of the structural beam are reinforced, the structural column can be demounted step by step, the structure is simple, the erecting method is convenient, the measures are simple, the operation difficulty of high-clearance lower joist column replacement construction can be well controlled, the construction efficiency is high, and the construction cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of reinforcement and reconstruction construction, and in particular to a construction structure for replacing columns with supporting beams at high altitude. Background Art

[0002] With the rapid development of society, early buildings are also aging, and people's requirements for the experience of buildings are getting higher and higher, and the problem of old buildings is becoming increasingly prominent. Due to the cumbersome procedures for demolition and reconstruction of buildings, many old buildings are renovated by reinforcement and transformation. Many existing public buildings are still short and narrow in terms of usable space, which cannot meet the current requirements for public buildings to have sufficient spacious space.

[0003] In order to make the interior space of the building more efficient and flexible, larger columns and higher beams are usually set on the ground floor of the building to create an open space without central columns or other obstacles. Axis network transformation is a common transformation method in reinforcement and transformation projects, which involves the construction part of beam-to-column replacement, which is the most complex transformation content in construction. Beam-to-column replacement is mainly used to strengthen or replace columns in buildings while maintaining the stability and safety of the structure. Especially under high-clearance construction conditions, the difficulty of the technical measures for beam-to-column replacement will increase dramatically. Therefore, it is necessary to propose a simple structure to solve the technical problems existing in the existing beam-to-column replacement during the construction process. Summary of the invention

[0004] In view of the above problems, the present invention provides a construction structure for replacing columns with supporting beams at high altitude, in which inclined support plates are arranged to connect beams and columns, and prestress is provided by electric jacks to remove columns and tighten beams. The construction structure is convenient to construct and the measures are simple. It can better control the operational difficulty of replacing columns with supporting beams at high altitude, and it has high construction efficiency and greatly reduced construction costs.

[0005] A construction structure for replacing columns with high-clearance lower support beams is arranged between a structural column to be demolished and a structural beam to be reinforced, and is used to provide supporting force to the structural beam. The structure includes an oblique support structure symmetrically arranged on both sides of the structural column, and the oblique support structure includes column connecting plates symmetrically fixed to the opposite side wall surfaces on both sides of the structural column, a triangular plate assembly is welded on the surface of each column connecting plate, and a horizontal end bearing plate is fixedly arranged on each triangular plate assembly. An electric jack is vertically installed on the upper surface of the end bearing plate, and a vertical support structure connected to the structural beam is fixedly installed on the free extension end of the electric jack.

[0006] Preferably, the triangular plate assembly includes two identical triangular plates having right-angled sides perpendicular to each other, one right-angled side of the two triangular plates is arranged in parallel on the surface of the column connecting plate, the other right-angled side of the triangular plates faces the structural beam and is located in the same horizontal plane, and the end supporting plates are welded to the right-angled sides of the two triangular plates facing upwards.

[0007] Preferably, the vertical support node includes a pressure plate fixedly arranged on the top of the free extension end of the jack, a plurality of steel short columns are evenly and vertically welded on the upper surface of the pressure plate, a support pipe is sleeved on the outer peripheral surface of the steel short column and is threadedly connected to the steel short column, and the top end of the support pipe is in contact with the structural beam.

[0008] Preferably, the column connecting plate is made of a steel plate with the same width as the structural column and has a plurality of through holes. The column connecting plate surrounds the structural column. Two column connecting plates symmetrical with respect to the structural column are fastened together by connecting screws penetrating the through holes of the structural column and the column connecting plates. Structural glue is injected into the gap in the column grouting area between the column connecting plate and the structural column, and adjacent column connecting plates are welded together.

[0009] Preferably, the structural protective layer is chiseled off the area where the structural column contacts the column connecting plate until the column reinforcement is exposed, and the connecting screw does not contact the column reinforcement.

[0010] Preferably, the structural beam is surrounded by a frame assembled with steel bars, and vertical and horizontal formworks are attached to the left and right sides and the lower part of the frame. The vertical formworks on the left and right sides of the frame are also attached to the main keel one on the side facing away from the structural beam. The vertical side wall formworks on the left and right sides of the frame are fastened by tension rods that penetrate the structural beam, the vertical formworks and the main keel one through butterfly buckles at both ends. Rebar embedding screws are implanted on the lower side of the structural beam, and the rebar embedding screws pass through the structural beam and the horizontally disposed formwork at its bottom and the main keel two in turn and are connected with fasteners. A secondary keel is arranged between the main keel two and the horizontally disposed formwork, and the fasteners at the lower end of the rebar embedding screws support the main keel two, the secondary keel and the horizontally disposed formwork between the two vertically disposed formworks, and the upper surface height of the secondary keel is lower than the horizontally disposed formwork.

[0011] The utility model provides a construction structure for replacing columns with high clearance lower support beams. By setting an oblique support structure between the structural column and the structural beam, that is, using a column connecting plate stably connected to the structural column and a triangular plate assembly welded on the side of the column connecting plate to form a stable support structure foundation, a pressure plate and an electric jack are set on the triangular plate assembly to provide the structural beam with a supporting force that replaces the structural column. Based on such a stable oblique support structure, on the one hand, the pre-dismantled area of ​​the structural column is removed, and on the other hand, the original structural beam can be reinforced by inserting vertical reinforcing rods and horizontal tension rods to improve the strength of the structural beam. After the reinforcement of the structural beam is completed, the remaining structural columns are further removed, so that the purpose of replacing columns with high clearance support beams is achieved. By optimizing the layout of the structural columns and the structural beams, the bottom floor of the building obtains a larger clearance, providing more space for various activities in the building. At the same time, based on such a structure, the operational difficulty of the construction of replacing columns with high clearance lower support beams can be better controlled, and the construction efficiency is high and the construction cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the diagonal bracing support in the utility model;

[0013] Figure 2 This is a schematic diagram of the connection of the center column connecting plate of the utility model;

[0014] Figure 3 This is an overall schematic diagram of the reinforcement connection of the central beam structure of the utility model;

[0015] Figure 4 It is a schematic cross-sectional view of the reinforcement connection of the central beam structure of the utility model. DETAILED DESCRIPTION

[0016] In order to facilitate those skilled in the art to understand and implement the present invention, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0017] A construction structure for replacing columns with high clearance lower joists, such as Figure 1 As shown, the column connecting plate 1 is reinforced and installed on each surface of the structural column 2, as shown in FIG. Figure 2As shown, before the column connecting plate 1 is installed, an electric pick is used to chisel off the structural protective layer of the structural column 2 at the installation position of the column connecting plate 1 of the structural column 2 until the main reinforcement 13 is exposed, and then an electric drill is used to drill through the screw eyes along the front and rear walls and the left and right walls of the structural column 2, and the connecting screw rod 4 is inserted through the through screw eyes. The diameter of the connecting screw rod 4 is not greater than the screw eye diameter, and the length of the connecting screw rod 4 is greater than the width of the front and rear walls and the left and right walls of the structural column 2; a plurality of through holes are provided on the column connecting plate 1, and the number of the connecting screw rods 4 arranged in the structural column 2 matches the number of the through holes provided on the column connecting plate 1. After each connecting screw rod 4 extends out of the structural column 2, it passes through the through hole of the column connecting plate 1, and two fastening nuts 3 are provided at the end of each connecting screw rod 4, and the column connecting plate 1 is installed on the surface of the structural column 2 by means of the double fastening nuts 3; finally, structural glue is injected into the grouting area 14 in the gap between the column connecting plate 1 and the structural column 2. The mutually contacting edges of adjacent column connecting plates 1 on the surface of the structural column 2 are connected by welding, thereby ensuring the strength of the column connecting plates 1 installed on the surface of the structural column 2 .

[0018] like Figure 1 As shown, triangle plate assemblies are respectively arranged on two opposite symmetrical surfaces of the structural column 2, and each triangle plate assembly is welded and connected to the column connecting plate 1 fixed on the surface of the column connecting plate 1. Each triangle plate assembly includes two identical triangle plates 5 symmetrically arranged on the surface of the column connecting plate 1. The triangle plates 5 are thick triangle plates with a right angle of 90°. One right-angled side of each triangle plate 5 is vertically welded to the surface of the column connecting plate 1 by double-sided full welding, and the other right-angled side of each triangle plate 5 faces upward and is in the same horizontal plane; the end bearing plate 6 is arranged on the upper part of the horizontal right-angled side of the triangle plate 5 and is welded and fixed thereto, and the center of the end bearing plate 6 is located at the center position between the two triangle plates 5. A vertically standing electric jack 7 is fixed on the center position of the end bearing plate 6, and a pressure plate 9 is installed on the free protruding end of the electric jack 7. A plurality of steel short columns 10 are uniformly welded on the upper surface of the pressure plate 9, and a support pipe 11 is sleeved on the outer peripheral surface of the steel short column 10 by threaded connection. The electric jack 7 is operated to make the top end of the support pipe 11 contact with the structural beam 12.

[0019] Preferably, in this embodiment, the column connecting plate 1 is made of a 20 mm thick steel plate, the height of the column connecting plate 1 is 800 mm, and the width of the column connecting plate 1 is the same as the width of the structural column 2. The diameter of the through hole of the column connecting plate 1 is 27 mm, and two rows and three columns of 6 through holes are provided on the column connecting plate 1. The diameter of the through screw eye in the structural column 2 is 27 mm, and the through screw eyes of the front and rear walls and the left and right walls of the structural column 2 are distributed in two rows and three columns of 6, the diameter of the connecting screw rod 4 is 25 mm, and the number of the connecting screw rods 4 in the structural column 2 is 12.

[0020] Preferably, in this embodiment, the end bearing plate 6 has a thickness of 25 mm and a cross-sectional size of 400 mm×400 mm. The pressure plate 9 is a steel plate with a thickness of 20 mm and a cross-sectional size of 300 mm*300 mm. Six steel short columns 10 are evenly welded on each pressure plate 9. The steel short columns 10 are distributed on the pressure plate 9 in 2 rows and 3 columns. The diameter of the steel short columns 10 is 20 mm and the height is 50 mm. The support pipe 11 is made of a steel pipe with an outer diameter of 30 mm and a wall thickness of 5 mm. If the length of the support pipe 11 exceeds 30 cm, grouting material is filled in the support pipe 11 and then the steel short column 10 is inserted.

[0021] After the diagonal bracing support structure composed of the above structure is installed, the electric jack is controlled to apply prestressing force to the structural beam 12 that is the same as the supporting force of the original structural column 2, and then the column pre-removal area 8 is removed to the required construction height, and the remaining part of the structural column 2 and the diagonal bracing support structure are used to continue to provide supporting force to the structural beam.

[0022] After removing the column pre-removal area 8, if Figure 3 Figure 4 As shown, an electric pick is used to roughen the top of the structural beam 12 as a whole, and then an electric drill is used to evenly set a plurality of through screw eyes on both sides of the structural beam 12 near the top along the width direction of the structural beam, and reserved through holes for embedding rebars. After the reinforcing steel bars 15 are coated with embedding glue, they are implanted into the through holes for embedding rebars at the top of the structural beam 12, and are closed after embracing the side walls and the bottom of the structural beam 12 for a week. Horizontal reinforcing steel bars 15 are set along the length direction on the side walls and the bottom of the structural beam 12, and the reinforcing steel bars 15 are fastened and tied to the structural beam 12. The strength of the beam structure is improved by adding reinforcing steel bars 15. In this embodiment, the diameter of the through screw eyes is 16 mm.

[0023] like Figure 4 As shown, when a horizontal template 16 is set at the bottom of the structural beam 12, an electric drill is used to set a through hole in the height direction of the structural beam 12 at the bottom of the structural beam 12, and a rebar threading rod 20 coated with rebar glue is inserted into the reserved through hole. The rebar threading rod 20 is partially inserted into the through hole, and the rebar threading rod 20 exposed outside the structural beam 12 passes through the bottom horizontal template 16 and the second main keel 18, and then the horizontal template 16 is fastened to the bottom of the structural beam 12 by the butterfly buckle 17; the secondary keel 19 is clamped between the second main keel 18 and the bottom horizontal template 16, and multiple secondary keels 19 are fixed in parallel to the lower surface of the horizontal template 16 in the horizontal direction. In this embodiment, the diameter of the through hole set in the height direction of the structural beam 12 is 14mm and the depth is 15mm, and the diameter of the rebar threading rod 20 is 12mm. The horizontal template 16 set at the bottom of the structural beam 12 is located below the pressure plate 9.

[0024] like Figure 3 and Figure 4As shown, when the vertical templates 16 on both sides of the structural beam 12 are reinforced, an electric pick is used to roughen the overall surface of the structural beam 12, and then an electric drill is used to set through-screw holes on both sides of the structural beam and through the width direction of the structural beam, and a pair of drawing rods 21 are inserted into the reserved through-screw holes. A plastic sleeve 22 is provided on the outside of the drawing rod 21, and butterfly buckles 17 are connected to both ends of the drawing rod 21. Vertical templates 16 and main plates with through holes are installed at both ends of the drawing rod 21 in sequence. The keel 23, the drawing rod 21 and the butterfly buckle 17 fasten the vertical formwork 16 and the main keel 23 on both sides of the structural beam 12; multiple main keels 23 are arranged in parallel on the outer surface of the vertical formwork 16 in the horizontal or vertical direction, and are fixed to the vertical formwork 16 by screws. After the drawing rod 21 passes through the horizontally arranged through-screw eyes in the structural beam, it passes through the vertical formwork 16 and the main keel 23 in turn, and its end is locked by the butterfly buckle 17.

[0025] Specifically, after pouring between the vertical formwork and the horizontal formwork, the structural beam 12 is tightened as a whole, and the overall structural strength of the reinforced structural beam is calculated. When the strength meets the requirements, the vertical formwork on both sides of the front and rear of the reinforced structural beam is first removed, and the wire rods are removed and recycled. After the reinforced structural beam meets the design requirements, the horizontal formwork at the bottom is removed, and then the diagonal support structure on the structural column is further removed, and finally the remaining structural column is completely removed.

[0026] Based on the above-mentioned construction method of a high clearance lower support beam replacement column construction structure, the implementation steps include the following steps:

[0027] S1. A column connecting plate is arranged on the structural column, and triangular plate assemblies are respectively welded on the opposite column connecting plates, and end bearing plates, electric jacks, pressure plates and other components are installed on the triangular plate assemblies to form a diagonal bracing support structure;

[0028] S2. Control the electric jack to adjust the support force provided by the diagonal support structure to the structural beam until the support force reaches the same as that of the original structural column, and then remove the column pre-removal area;

[0029] S3. After the diagonal bracing structure reaches stability, the structural beams are reinforced and steel bars are tied, which specifically includes the following steps:

[0030] S301. The structural beam is roughened, a horizontal through-screw eye is set on the side wall of the structural beam, a vertical through-screw eye is set on the bottom wall of the structural beam, a through hole for planting steel bars is reserved in the vertical through-screw eye, and then a through-screw glue is applied, and then vertical reinforcement steel bars are implanted, and a pair of wire rods are inserted into the horizontal through-screw eye;

[0031] S302. Fasten the side wall templates on both sides of the beam on the tension rods extending from the side walls of the structural beam, and fasten the bottom template on the rebar wire rods extending from the bottom of the structural beam;

[0032] S303. According to the strength and design requirements of the structural beam to be reinforced, after the reinforcement is completed, the fastening structure of the bottom of the structural beam and the side walls on both sides is gradually removed;

[0033] S4. After the structural beams are reinforced, remove the diagonal bracing structure between the structural columns and the structural beams, and finally remove the remaining structural columns.

[0034] The above description describes a preferred embodiment of the present invention and should not be regarded as limiting the scope of protection of the claims of the present invention. Any modification, equivalent substitution and improvement without departing from the principle and spirit of the present invention should be regarded as within the scope of protection of the claims of the present invention.

Claims

1. A high-clearance lower support beam replacement construction structure, arranged between a structural column (2) to be removed and a structural beam (12) to be reinforced, for providing support force to the structural beam (12), characterized in that: The structure comprises an oblique bracing support structure symmetrically arranged on both sides of a structural column (2), the oblique bracing support structure comprising a column connecting plate (1) symmetrically fixed on the opposite side wall surfaces of the structural column (2), each column connecting plate (1) having a triangular plate assembly welded on its surface, each triangular plate assembly having a horizontal end bearing plate (6) fixedly arranged thereon, an electric jack (7) vertically mounted on the upper surface of the end bearing plate (6), and a vertical supporting structure connected to a structural beam (12) fixedly mounted on the free extension end of the electric jack (7).

2. The high clearance lower support beam replacement column construction structure according to claim 1 is characterized in that: The triangular plate assembly comprises two identical triangular plates (5), the triangular plates (5) having right-angled sides perpendicular to each other, one right-angled side of the two triangular plates (5) being arranged in parallel on the surface of the column connecting plate (1), the other right-angled side of the triangular plates (5) facing the structural beam (12) and being located in the same horizontal plane, and the end bearing plate (6) being welded to the right-angled sides of the two triangular plates (5) facing upward.

3. The high clearance lower support beam replacement column construction structure according to claim 1 is characterized in that: The vertical support structure comprises a pressure plate (9) fixedly arranged on the top of the free extension end of the jack (7), a plurality of steel short columns (10) uniformly and vertically welded on the upper surface of the pressure plate (9), a support tube (11) sleeved on the outer peripheral surface of the steel short column (10) and threadedly connected to the steel short column (10), and the top end of the support tube (11) contacts the structural beam (12).

4. The high clearance lower support beam replacement column construction structure according to claim 1 is characterized in that: The column connection plate (1) is made of a steel plate of the same width as the structural column (2) and is provided with a plurality of through holes. The column connection plate (1) surrounds the structural column (2) for a circle. Two column connection plates (1) symmetrical with respect to the structural column (2) are fastened and connected by a connecting screw (4) penetrating the through holes of the structural column (2) and the column connection plate (1). Structural glue is injected into the gap of the column grouting area (14) between the column connection plate (1) and the structural column (2), and adjacent column connection plates (1) are welded and connected to each other.

5. The high clearance lower support beam replacement column construction structure according to claim 4 is characterized in that: The structural protective layer of the area where the structural column (2) contacts the column connecting plate (1) is chiseled off until the column reinforcement (13) is exposed, and the connecting screw rod (4) does not contact the column reinforcement (13).

6. The high clearance lower support beam replacement column construction structure according to claim 1 is characterized in that: The structural beam (12) is surrounded by a frame assembled with steel bars (15), and vertical templates (16) and horizontal templates (16) are attached to the left and right sides and the lower part of the frame. The vertically arranged templates (16) on the left and right sides of the frame are also attached to the main keel (23) on the side facing away from the structural beam (12). The vertical side wall templates on the left and right sides of the frame are fastened by a pair of wire rods (22) that penetrate the structural beam (12), the vertically arranged templates (16) and the main keel (23) through butterfly buckles (17) at both ends. The lower side of the structural beam (12) is implanted with embedded steel bars. The screw rod (20) passes through the structural beam (12) and the template (16) horizontally arranged at its bottom and the second main keel (18) in sequence and is connected to the fasteners. A secondary keel (19) is arranged between the second main keel (18) and the horizontally arranged template (16). The fasteners at the lower end of the screw rod (20) support the second main keel (18), the secondary keel (19) and the horizontally arranged template (16) between two vertically arranged templates (16). The upper surface height of the secondary keel (19) is lower than the horizontally arranged template (16).

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