Construction technology of suspension type constructional column

Abstract

The invention relates to a construction process of a constructional column, in particular to a construction process of a suspension type constructional column, which is characterized in that the constructional column and a bearing structure frame are synchronously constructed and simultaneously poured and formed, and belongs to the field of buildings. The construction technology of the suspension type constructional column comprises the following steps that (1) the embedded steel bars are manufactured; (2) one end of the embedded steel bar is embedded into the lower-layer structural beam; (3) pouring concrete; (4) flexible pad drilling; (5) pouring an upper-layer structural beam and a constructional column; (6) after the column formwork is dismounted, the flexible pad is chiseled away; and (7) extruding the cement mortar into a gap between the bottom of the constructional column and the lower-layer structural beam. The method has the following advantages: the method and a bearing main body structure are cast and tamped simultaneously, and the appearance quality process is good; concrete chiseling caused by secondary pouring and tamping is avoided, and energy conservation and environmental protection are achieved; therefore, the construction process can save the cost; the concrete construction quality is easy to control; according to the construction technology, the construction efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The invention relates to a construction process of a structural column, in particular to a construction process of a suspended structural column in which a structural column and a load-bearing structure frame are synchronously constructed and cast at the same time, and belongs to the field of construction. Background Art

[0002] The construction quality defects of traditional secondary cast structural columns are common problems in the construction industry. For example, the problem of structural column rebar planting requires a large number of rebars, and the quality of the top inverted rebar planting is difficult to guarantee; the depth of the inverted drilling at the bottom of the beam is difficult to guarantee, and the drilling is easy to hit the structural steel bars, and the cleaning of the drilled holes is also very troublesome. In the actual construction site, the pull-out resistance of most of the beam bottom rebars does not meet the specification requirements; another example is the problem of pouring and installing the dustpan mouth. It is labor-consuming and time-consuming for carpenters to install the dustpan mouth template. In actual construction, the dustpan mouth is often not installed due to the high labor cost, and the pouring to the top is When the entire column cannot be filled, it is common to just fill it with hands. If a dustpan mouth is installed for pouring, the concrete at the dustpan mouth needs to be chiseled out, resulting in a waste of concrete and generating a lot of construction waste, which is neither economical nor environmentally friendly. Repairs and leveling are still required after the formwork is removed, and the visual quality is relatively poor. In addition, the traditional secondary pouring process of structural columns has low efficiency and slow pouring speed. The concrete mixer truck stays on site for a long time, even exceeding the initial setting time. Some concrete mixers are simply unloaded on the ground and mixed with water. The concrete strength of the secondary poured structural columns is difficult to guarantee. Summary of the invention

[0003] The purpose of the present invention is to provide a construction process for a suspended structural column, which is cast and formed simultaneously with a load-bearing main structure, and has better appearance and quality than a traditional secondary casting process.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: a construction process of a suspended structural column, comprising the following steps: (1) Pre-buried steel bars are made, and the two ends of the pre-buried steel bars are bent to form a cantilever structure, and the two ends extend in opposite directions; (2) One end of the embedded steel bar is embedded in the lower structural beam, and the other end is left hanging in the air, facing the upper structural beam; (3) After pouring concrete and the concrete of the lower structure beam reaches a certain strength, the lower structure beam is roughened to completely chisel out the cantilever structure and form a roughened gap on the lower structure beam; (4) Drill holes in the flexible pad. The position of the holes corresponds to the bottom of the embedded steel bars. Insert the flexible pad into the bottom of the embedded steel bars and chisel the top of the gap. (5) Tie up embedded steel bars and anchor steel bars, install column formwork, and simultaneously cast upper structure beams and structural columns; (6) After the column formwork is removed, the flexible pad is chiseled off to form a suspended structural column; (7) Squeeze cement mortar into the gap between the bottom of the structural column and the lower structural beam, fill it tightly, and smooth the surface.

[0005] Preferably, in step (1), the embedded steel bars are Z-shaped.

[0006] Preferably, in step (1), the extension directions of the two ends of the embedded steel bars are parallel.

[0007] Preferably, in step (1), the length of the cantilever structure is not less than 80 mm.

[0008] Preferably, in step (2), the bottom surface of the cantilever structure is flush with the structural elevation surface of the lower structural beam.

[0009] Preferably, in step (3), the maximum outer dimension of the cantilever structure is consistent with the inner dimension of the roughened gap.

[0010] Preferably, in step (4), the flexible pad is an XPS board or an air bag.

[0011] Compared with the prior art, the present invention has the following advantages: 1. It is cast and formed at the same time as the load-bearing main structure, and its visual quality is better than that of the traditional secondary casting process; 2. It avoids the chiseling of concrete caused by secondary pouring, which is energy-saving and environmentally friendly; 3. Since the labor cost of secondary structure construction is higher than that of primary structure, this construction process can save costs; 4. The quality of concrete construction is easy to control; 5. This construction process improves construction efficiency and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the structure of the embedded steel bars and the lower structural beam in the embodiment of the present invention (before pouring concrete, embedded stage); Figure 2 Schematic diagram of the structure of the upper structure beam, structural column and lower structure beam in the embodiment of the present invention (after pouring concrete and before removing the XPS board); Figure 3 yes Figure 2 A magnified view of part A; Figure 4 is a schematic diagram of the structure of an XPS board in an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the upper structure beam, the structural column and the lower structure beam in the embodiment of the present invention (after pouring concrete and sealing the seams in the later stage); Figure 1-4Among them, 1. "Z"-shaped steel bars; 2. Positioning stirrups; 3. Structural beam steel bars; 4. Lower structural beams; 5. Roughened gaps; 6. XPS boards; 7. Structural columns; 8. Upper structural beams; 9. Sealing mortar. DETAILED DESCRIPTION

[0013] It should be noted that the terms “upper”, “lower”, “bottom”, etc. are described according to the drawings or common usage and do not constitute limitations to the present invention.

[0014] The following is combined with Figure 1-5 The present invention is further described in detail: A construction process of a suspended structural column comprises the following steps: (1) “Z” type steel bar production In order to ensure that the longitudinal reinforcement of the structural column 7 does not form a "reinforcement short column" to transmit vertical force, the longitudinal reinforcement of the structural column is divided into anchor reinforcement and embedded reinforcement, and the embedded reinforcement is made into a "Z" bend, that is, Figure 1 The "Z"-shaped steel bar 1 shown, the amplitude of the "Z" bend can be determined according to the actual size of the structural column, and generally the horizontal section can be no less than 80mm; the horizontal section of the "Z" bend can be regarded as a cantilever structure, that is, the "steel short column" becomes a "steel cantilever beam"; (2) Embedded steel bars After the positioning stirrups 2 of the lower structural beam 4 are tied, the embedded steel bars of the structural column ("Z"-shaped steel bars 1) are embedded. At the same time, the top surface of the steel bars of the transverse cantilever structure of the "Z"-shaped steel bars 1 is flush with the structural elevation surface; (3) Pouring concrete Pour the concrete of the lower structural beam 4, and straighten the "Z"-shaped steel bar 1 (embedded steel bar) after pouring; (4) Surface roughening After the concrete pouring is completed and reaches a certain strength, the lower structure beam 4 is roughened. At this time, the structural column is roughened at the same time. The roughening depth of the structural column is the structural column diameter d + 10mm. The "Z" bend (cantilever structure) is completely chiseled out and the joint surface is washed clean; After the "Z" bend is completely chiseled out, a Figure 2-3 The roughened gap 5 shown in the figure has an inner diameter that is consistent with the outer diameter of the "Z"-shaped steel bar 1, that is, the outer diameter of the structural column 7 after forming is larger than the outer diameter of the roughened gap 5; (5) XPS board drilling After the concrete pouring is completed, the measurement and layout are carried out, the edge line of the structural column 7 is popped up, the position of the steel bars is measured on site, and the drilling positioning line is drawn on the XPS board 6, such as Figure 4 As shown, the drilled holes are about 10mm larger than the longitudinal reinforcement so that the longitudinal reinforcement can be smoothly inserted into the XPS board; (6) Insert the XPS board Cut the XPS board 6 according to the size of the structural column 7 to a thickness of 30 mm, insert the drilled XPS board 6 into the bottom of the structural column, completely cover the roughened gap 5, and align it with the edge of the structural column 7; (7) Tie steel bars and support formwork for pouring After the XPS board 6 is installed, the bottom of the anchor steel bar (the top extends into the upper structure beam 8) is tied to the embedded steel bar, the embedded steel bar and the structural beam steel bar 3, and the column formwork is installed and reinforced; before the concrete is poured, the upper structure beam 8 and the structural column 7 are poured simultaneously, and the structural column concrete is poured from the reserved hole at the bottom form of the upper structure beam 8, and vibrated to make it dense to prevent omission during pouring; (8) Remove the bottom extruded board and fill the gaps After the template of the upper structure beam 8 is removed, the XPS board 6 at the bottom of the structural column is chiseled off, and the debris in the reserved gap at the bottom of the structural column is blown away. The same grade of caulking mortar 9 (mixed with mineral expansion waterproofing agent when strict requirements are placed on the waterproofing of the exterior wall) is squeezed into the bottom gap with a caulking gun, and the mortar is filled tightly and the surface is smoothed. Figure 5 shown.

[0015] Principle: The structural column 7 is constructed synchronously with the load-bearing structural frame and cast at the same time. In order to avoid the "structural column" from forming a "beam-on-beam" to transfer vertical loads, change the structural force system, and cause the lower structural beam 4 to be subjected to excessive force deformation or even damage, a hanging construction is adopted, that is, a bottom flexible pad is used for partition. In this embodiment, an XPS board 6 is used for partition, so that it is suspended on the frame beam (upper structural beam 8). However, the longitudinal steel bars of the structural column 7 are equivalent to "small steel columns" one by one, and still transmit a large load. In order to reduce the force transmission effect of the longitudinal steel bars of the structural column, the lower end of the embedded steel bar is made into a "Z" shape, and the "small steel column" becomes a cantilever beam, and its vertical equivalent stiffness is much lower than that of the structural beam, so that the vertical force is almost not transmitted, so as to achieve the effect of being suspended on the frame beam. After the main structure formwork support is removed and the force and deformation of the upper structural beam are basically stable, the bottom XPS board is removed, and a caulking gun is used to squeeze the caulking mortar 9 with the same strength as the structural column into the bottom gap of the structural column to fill it tightly.

[0016] The above embodiments are only preferred embodiments of the present invention and do not constitute a limitation of the present invention. For example, the bottom mortar 9 can be replaced by dry hard fine stone concrete; the bottom XPS board 6 can be replaced by an air bag; any extension, deformation, equivalent replacement, etc. made by ordinary technicians in this field based on the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction process for a suspended structural column, characterized in that: The following steps are included: (1) Pre-embedded steel bars are made, and the two ends of the pre-embedded steel bars are bent to form a cantilever structure, and the two ends extend in opposite directions; (2) One end of the embedded steel bar is embedded in the lower structural beam, and the other end is suspended in the air, facing the upper structural beam; (3) After pouring concrete and the concrete of the lower structure beam reaches a certain strength, the lower structure beam is roughened to completely chisel out the cantilever structure and form a roughened gap on the lower structure beam; (4) Drill holes in the flexible pad. The position of the holes corresponds to the bottom of the embedded steel bars. Insert the flexible pad into the bottom of the embedded steel bars and chisel the top of the gap. (5) Tie up embedded steel bars and anchor steel bars, install column formwork, and simultaneously cast upper structure beams and structural columns; (6) After the column formwork is removed, the flexible pad is chiseled off to form a suspended structural column; (7) Squeeze cement mortar into the gap between the bottom of the structural column and the lower structural beam, fill it tightly, and smooth the surface.

2. The construction process of the suspended structural column according to claim 1, characterized in that: In step (1), the embedded steel bars are in a Z shape.

3. The construction process of the suspended structural column according to claim 1 is characterized in that: In step (1), the extension directions of the two ends of the embedded steel bars are parallel.

4. The construction process of the suspended structural column according to claim 1 is characterized in that: In step (1), the length of the cantilever structure is not less than 80 mm.

5. The construction process of the suspended structural column according to claim 1 is characterized in that: In step (2), the top surface of the cantilever structure is flush with the structural elevation surface of the lower structural beam.

6. The construction process of the suspended structural column according to claim 1, characterized in that: In step (3), the maximum outer dimension of the cantilever structure is consistent with the inner dimension of the roughened gap.

7. The construction process of the suspended structural column according to claim 1, characterized in that: In step (4), the flexible pad is an XPS board or an air bag.

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