CN111255158B - Constructional column construction method - Google Patents
Constructional column construction method Download PDFInfo
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- CN111255158B CN111255158B CN202010176089.2A CN202010176089A CN111255158B CN 111255158 B CN111255158 B CN 111255158B CN 202010176089 A CN202010176089 A CN 202010176089A CN 111255158 B CN111255158 B CN 111255158B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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Abstract
The invention discloses a constructional column construction method, wherein a preformed hole is formed on each layer of main body beam, a positioning mechanism for forming the preformed hole is obtained firstly, the positioning mechanism comprises an embedded rod and a grouting pipe, the lower end of the grouting pipe is provided with a horizontal bending end, the port of the bending end is closed, the upper pipe wall and the lower pipe wall of the bending end are provided with two positioning holes which are coaxial and used for the lower end of the embedded rod to vertically pass through, and the aperture of the positioning holes is matched with the outer diameter of the embedded rod; fixedly connecting the grouting pipe to the steel bars of the main body beam, pouring concrete of the main body beam, and maintaining to complete the main body structure; and taking out the embedded rod to form a preformed hole in the main body beam, blanking the main reinforcement of the constructional column, completing grouting, sequentially binding stirrups of the constructional column, building a filler wall, erecting a template and pouring concrete, and finally curing and forming the constructional column. The invention avoids drilling and planting bars during the construction of the constructional column, avoids the problems of drilling noise, insufficient hole depth, platform erection required by planting bars at the top and the like, and can improve the construction efficiency.
Description
Technical Field
The invention relates to the technical field of constructional columns, in particular to a constructional column construction method.
Background
It is now common for residential infill walls to use structural columns as a means of reinforcing the connection to the main structure and to enhance the seismic performance of the infill wall. However, the construction of the constructional column is troublesome, and the main bars of the constructional column are usually constructed by means of bar planting.
The conventional method for embedding the main reinforcements of the constructional column in the construction site comprises the steps of marking the pre-estimated positions of the main reinforcements of the constructional column on a beam by a worker with chalk after the beam template at the top of the constructional column is removed, respectively drilling the reinforcement embedding holes which are larger than the reinforcement embedding size by 4mm at the top and the bottom of the beam by using an impact electric drill, wherein the reinforcement embedding holes are blind holes, the upper holes and the lower holes of the same beam are not communicated, blowing off slag powder in the holes by using a fan, coating and embedding reinforcement embedding glue at the anchoring end of the rear embedded short reinforcement, quickly inserting the rear embedded short reinforcement into the reinforcement embedding holes by holding the short reinforcement, solidifying the reinforcement embedding glue, performing a reinforcement embedding drawing test, then blanking the main reinforcements of the constructional column, binding the upper ends and the lower ends of the main reinforcements with the upper short reinforcement and the lower short reinforcement of the same layer which are subjected to the drawing test, building a wall body and pouring concrete.
This conventional approach suffers from the following disadvantages: 1. when the rib planting hole is drilled, due to inaccurate positioning, repeated drilling is often carried out for many times, because the beam steel bars at the top of the constructional column are usually very dense, the position for drilling the rib planting hole can be very narrow, and the position for drilling and planting the rib can be very difficult to accurately find out after the mould is removed, so that a plurality of useless drilling holes are often formed at the periphery of the rib planting position of the constructional column; 2. the upper part and the lower part of the steel bar of the constructional column are not vertical, because the conventional method is operated by a bar planting worker, the steel bar planting worker cannot accurately position the steel bar, so that the upper part and the lower part of the main steel bar of the constructional column are not vertical, and the structural performance of the constructional column is poor; 3. the beam stressed main ribs on the top of the constructional column are easily damaged, and because an operator cannot identify whether the beam main ribs exist at the drilling position when drilling the bar planting hole, a drill bit of a drilling machine is easy to damage the beam stressed main ribs on the top of the constructional column during the drilling process; 4. the defects of high dust emission and high noise exist in the drilling process; 5. the same main reinforcement of each layer of constructional column is provided with two reinforcement binding joints, so that the workload is large; in summary, it is very important to provide a construction method of a constructional column without drilling and planting steel bars.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: the constructional column construction method can avoid drilling and bar planting during constructional column construction, avoid the problems of drilling noise, insufficient hole depth, platform erection required by bar planting at the top and the like, and improve the construction efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a constructional column construction method comprises the following steps of (a) during a main body beam construction stage before constructional column construction, carrying out measurement and setting-out according to construction drawings, and forming a reserved hole for inserting a main rib during subsequent constructional column construction on each layer of main body beam; (a1) firstly, acquiring a positioning mechanism for forming a reserved hole, wherein the positioning mechanism comprises a vertical embedded rod and an obliquely arranged grouting pipe, the lower end of the grouting pipe is provided with a horizontal bending end, and the upper end of the grouting pipe is abutted against a main beam side mold; the end opening of the bending end is closed, the upper pipe wall and the lower pipe wall of the bending end are provided with two positioning holes which are coaxial and allow the lower end of the embedded rod to vertically penetrate through, and the aperture of each positioning hole is matched with the outer diameter of the embedded rod; (a2) then after the positions of two positioning holes in the grouting pipe are detected to be matched with the positions of corresponding main reinforcements of the constructional column on the drawing, the grouting pipe is fixedly connected to the reinforcements of the main body beam, then the lower end of the embedded rod vertically penetrates through the two positioning holes and then reaches the bottom of the main body beam, the upper end of the embedded rod extends out of the top elevation of the main body beam, embedding of a positioning mechanism is completed, and the outer diameter of the embedded rod is larger than the diameter of the main reinforcements of the constructional column; (a3) pouring main body beam concrete, and maintaining to complete the main body structure; (a4) when the secondary structure constructional column is constructed, the embedded rod in the beam is pulled out, after the embedded rod is taken out, a reserved hole for the main rib of the constructional column to pass through is formed in the main beam, the reserved hole is cleaned, the reserved hole is guaranteed to be smooth, and blanking of the main rib of the constructional column is waited; (b) blanking a main reinforcement of the constructional column, wherein the middle position of the constructional column in the length direction is positioned in the reserved hole, and the two ends of the constructional column are respectively positioned in the middle positions of two adjacent floors; when the building is blanked, the lower end of the main reinforcement of the constructional column of the building is bound and connected with the upper end of the main reinforcement of the constructional column of the completed lower floor, which extends into the middle position of the building, and the upper end of the main reinforcement of the constructional column of the building extends upwards in advance into the middle position of the upper floor to be constructed to wait for the binding and connection of the lower end of the main reinforcement of the constructional column of the building, so that the steel bar blanking of the constructional column of the building is completed; (c) the grouting pipe is communicated with the preformed hole, and flexible caulking materials are injected into the pipe orifice of the grouting pipe on the top side surface of the main body beam of the layer to block the preformed hole until slurry is discharged from the top end of the preformed hole, so that grouting is completed; (d) after the preformed hole is plugged, sequentially performing procedures of binding stirrups of the constructional column, building a filler wall, erecting a template, pouring concrete and the like, and finally curing and forming the constructional column of the floor; (e) and (c) constructing the constructional columns of the upper floor, binding and connecting the lower ends of the main ribs of the constructional columns with the upper ends of the main ribs of the constructional columns which just extend into the middle position of the floor, extending the upper ends of the main ribs of the constructional columns into the middle position of the floor to be constructed of the upper floor in advance, and repeating the steps (c) and (d) in sequence until the construction of the constructional columns of all floors of the multi-storey building is completed.
In the construction method of the constructional column, the positioning mechanism is arranged in advance when the main structural beam is constructed, the bending end of the grouting pipe in the positioning mechanism forms an upper positioning hole and a lower positioning hole, the two positioning holes can limit the embedded rod, the embedded rod is prevented from moving left and right after passing through the positioning holes and can only move vertically, and the embedded rod is similar to the positioning holes in sliding connection, so that the positioning and the limiting of the embedded rod are ensured, the embedded rod can be conveniently pulled out upwards during the subsequent construction of the constructional column, other positioning supports are not needed for fixing the embedded rod, and the operation of workers is very simple; simultaneously the upper end of slip casting pipe contacts in the roof beam side, and pre-buried stick is extracted and is formed the preformed hole in the main part roof beam after, because slip casting pipe communicates with each other with the preformed hole, makes its slip casting pipe have the effect of slip casting hole, therefore the slip casting pipe has the dual function of location and slip casting, slip casting pipe and pre-buried stick sliding connection in addition, and follow-up pre-buried stick is extracted very laborsaving.
More importantly, a preformed hole formed after the embedded rod is pulled out is a vertical through hole in the main body beam, the preformed hole is different from a blind hole drilled in the beam in a traditional construction mode, the aperture of the preformed hole is larger than the diameter of a main rib of the constructional column by about 4mm, so that the blanking length and the blanking mode of the main rib of the constructional column are correspondingly changed; meanwhile, when the constructional column is constructed, the construction is carried out from a low floor to a high floor, namely from bottom to top, half of the main reinforcing bars of the constructional column of the previous floor are positioned in the floor, so that the main reinforcing bars of the constructional column of the half section are correspondingly fixed due to the completion of the construction of the constructional column below the floor, correspondingly, when the floor is constructed, the lower half of the main reinforcing bars of the constructional column of the floor is positioned in the floor and is connected with the main reinforcing bars of the constructional column which is already fixed in a reinforcement binding manner, the upper half of the main reinforcing bars of the constructional column of the floor can also upwards penetrate through the reserved holes to extend into the middle part of the floor to be constructed on the upper floor, and by analogy, the upper half of the main reinforcing bars of the constructed constructional column can extend into the floor, so that the main reinforcing bars of the constructional column of the floor are not easy to pull out, the conventional reinforcing bar pulling test is not needed any more for the reinforcing bars, and the construction process of the constructional column is simplified, the construction period is shortened; similarly, when the building is constructed, the upper half section of the main reinforcement of the constructional column of the building can also extend into the middle position of the floor to be constructed of the upper floor; the floor height of each floor is generally 2.8-3m, so the reinforcing steel bar joint for constructing the main reinforcement of each floor is generally at the position of 1.4-1.5m, and the operation is very convenient for workers.
Preferably, each constructional column comprises four main bars, the four main bars are rectangular in horizontal projection on the main body beam, four groups of positioning mechanisms are embedded in each main body beam, and four preformed holes formed by the four embedded bars are respectively in one-to-one correspondence with the four main bars of the constructional column.
Like this, in the normal work progress, every constructional column includes four main muscle, and every main muscle all has corresponding preformed hole on the roof beam, like this during subsequent constructional column construction, only need every main muscle pass corresponding preformed hole can, need not readjust the position of constructional column main muscle again, reduced the installation degree of difficulty of constructional column main muscle.
Preferably, in the step a, an X-shaped horizontal steel bracket is arranged at the upper end of each of the four embedded rods extending out of the top of the beam, and four end points of the steel bracket are respectively and fixedly connected with the upper ends of the corresponding embedded rods, so that the four embedded rods can be taken out of the main beam through the steel bracket together when the embedded rods are dismounted.
Thus, because the main body beam only supports two side dies and a bottom die in the template engineering of the beam in the construction process, the upper ends of four embedded bars can extend out of the beam top, the subsequent searching of the embedded bars is facilitated without marking, and the extraction of the embedded bars is also facilitated; in addition, in order to deal with the trend that the embedded rod can float upwards under the buoyancy action of concrete when the concrete of main body roof beam is poured, consequently can add on the steel bracket and establish the load, prevent that the embedded rod from floating upwards, guarantee that the preformed hole that forms in the main body roof beam is the through-hole.
Preferably, when the embedded rod is embedded in the step a, the embedded rod is round steel wrapped with a layer of foam cotton, so that the round steel is more easily separated from the main body beam; the grouting pipe is a steel pipe.
In this way, because the embedded rod is round steel, the round steel is prevented from directly contacting with concrete in the beam by wrapping a layer of foam cotton on the periphery of the round steel, and the surface of the round steel has no crescent pattern, so that the round steel and the foam cotton can slide up and down, and workers can save more labor when pulling out the embedded rod; the grouting pipe is arranged as the steel pipe, so that the grouting pipe is not easy to deform due to the stress change of concrete in the beam, the positioning hole is formed in the steel pipe, the limiting rigidity of the embedded rod can be guaranteed by the positioning hole, the embedded rod is not easy to shift left and right due to the stress change of the concrete, and the embedding precision of the embedded rod is guaranteed.
Preferably, in step a4, after the round steel is separated from the main body beam, the small-diameter round steel is used for removing foam cotton in the main body beam, and hole drilling is used for re-drilling the partially blocked preformed hole.
Like this, because need the slip casting in the preformed hole, consequently need clear away the foam cotton in the preformed hole, the grout in the preformed hole of pouring into like this can directly contact with the concrete of main part roof beam, and the main muscle of constructional column is better with the concrete associativity in the main part roof beam like this.
Preferably, in the step b, when the steel bar joints of the main bars of the constructional column are bound, the binding joints of the four main bars of the first-layer constructional column are staggered and are not positioned on the same horizontal plane.
Like this, when carrying out first floor constructional column construction, the ligature of four main muscle connects and staggers each other not to be located same horizontal plane, then the normal unloading of steel reinforcement joint of follow-up floor, also can guarantee that steel reinforcement joint still can stagger in succession, accord with construction standard requirement, the shear strength of reinforcing bar in the constructional column has been guaranteed, length when only needing the reinforcing bar unloading of first floor has to some extent difference can, follow-up constructional column main muscle length all according to the layer height on cell layer with steel reinforcement's overlap joint length unloading can.
Preferably, when the grout pipe is positioned in step a2, the lower end of the grout pipe is positioned between the middle of the side of the body girder and the bottom layer of steel bars in the body girder.
In this way, the positioning hole on the grouting pipe is positioned between the middle-lower part of the beam height and the lower floor steel bar, namely the middle-lower part of the embedded bar, and the steel bracket is positioned at the top end of the embedded bar, so that the positioning hole and the steel bracket are respectively positioned at two sides of the middle part of the embedded bar, and the limiting effect on the embedded bar is better; simultaneously, when the lower extreme of slip casting pipe was located the middle part of main part roof beam and the bottom reinforcing bar, space was more sufficient when pre-buried slip casting pipe in the roof beam like this, had made things convenient for the pre-buried of slip casting pipe.
And optimally, the preformed holes corresponding to the main ribs of each layer of constructional columns coincide with the vertical projections of the preformed holes on the main beams of the upper floor or the main beams of the lower floor.
Therefore, the vertical direction of the main reinforcement of the constructional column can be ensured, the verticality of the main reinforcement of the constructional column is ensured, the error of the constructional column is smaller, and the stability of a masonry structure is better.
Preferably, after the grouting pipe is fixed in step a2, a detachable upper cover is arranged on the upper end cover of the grouting pipe to prevent concrete of the main body beam from entering the grouting pipe and blocking the grouting pipe, and the upper cover is opened when the grouting pipe is grouted in step c.
In conclusion, the beneficial effects of the invention are as follows: through at the pre-buried positioning mechanism of major structure construction stage, when subsequent constructional column construction, the preformed hole that the embedded stick formed after extracting is vertical through-hole in the main part roof beam, need not carry out mechanical drilling on the main part roof beam, the follow-up construction process of giving the constructional column has been simplified, and the upper end through the constructional column owner muscle that has accomplished stretches into in this floor, fixed effect has been played to the constructional column owner muscle, consequently also need not be planted the muscle and also be the reinforcing bar and draw the experiment, the construction cycle of constructional column has been shortened, and the reinforcing bar joint of every floor constructional column has been reduced, workman's work load has been reduced, building material has also been practiced thrift.
Drawings
For purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made in detail to the present invention as illustrated in the accompanying drawings, in which:
FIG. 1 is a schematic view of a structure involved in the method of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a schematic structural view of the positioning mechanism of FIG. 1;
fig. 4 is a top view of the body rail of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Reference numerals in the drawings of the specification include: the main body beam comprises a main body beam 1, a grouting pipe 2, a preformed hole 3, an embedded rod 4, a main rib 5 and a steel bracket 6.
The construction method of the constructional column in the specific embodiment comprises the following steps of (a) during the construction stage of the main body beam before the construction of the constructional column, carrying out measurement and setting-out according to a construction drawing, and forming a reserved hole 3 for inserting a main reinforcement 5 during the subsequent construction of the constructional column on each layer of the main body beam 1; (a1) firstly, obtaining a positioning mechanism for forming a preformed hole 3, wherein the positioning mechanism comprises a vertical embedded rod 4 and an obliquely arranged grouting pipe 2, the lower end of the grouting pipe 2 is provided with a horizontal bending end, and the upper end of the grouting pipe is abutted against a side die of a main body beam 1 as shown in figures 1 to 4; the end opening of the bending end is closed, the upper pipe wall and the lower pipe wall of the bending end are provided with two positioning holes which are coaxial and allow the lower end of the embedded rod 4 to vertically penetrate through, and the aperture of each positioning hole is matched with the outer diameter of the embedded rod 4; (a2) then after the positions of two positioning holes in the grouting pipe 2 are detected to be matched with the positions of main reinforcements 5 corresponding to the constructional column on the drawing, the grouting pipe 2 is fixedly connected to the reinforcements of the main body beam 1, then the lower end of an embedded rod 4 vertically penetrates through the two positioning holes and then reaches the bottom of the main body beam 1, the upper end of the embedded rod extends out of the beam top elevation of the main body beam 1, embedding of a positioning mechanism is completed, and the outer diameter of the embedded rod 4 is larger than the diameter of the main reinforcements 5 of the constructional column; (a3) pouring concrete of the main body beam 1, and maintaining to complete the main body structure; (a4) when the secondary structure constructional column is constructed, the embedded rod 4 in the beam is pulled out, after the embedded rod 4 is taken out, a preformed hole 3 for the constructional column main reinforcement 5 to pass through is formed in the main body beam 1, the preformed hole 3 is cleaned, the preformed hole 3 is ensured to be smooth, and the blanking of the constructional column main reinforcement 5 is waited; (b) blanking a main reinforcement 5 of the constructional column, wherein the middle position of the constructional column in the length direction is positioned in the reserved hole 3, and two ends of the constructional column are respectively positioned in the middle positions of two adjacent floors; when the building is blanked, the lower end of the main reinforcement 5 of the constructional column of the building is bound and connected with the upper end of the main reinforcement 5 of the constructional column, which is already finished and extends into the middle position of the building from the lower floor, and the upper end of the main reinforcement 5 of the constructional column of the building extends upwards in advance into the middle position of the building to be constructed from the upper floor to wait for the binding connection of the lower end of the main reinforcement 5 of the constructional column when the building is constructed from the upper floor, so that the steel bar blanking of the constructional column of the building is finished; (c) the grouting pipe 2 is communicated with the preformed hole 3, flexible caulking materials are injected into the pipe orifice of the grouting pipe 2 on the top side surface of the main body beam 1 to seal the preformed hole 3, and grouting is finished until grout is discharged from the top end of the preformed hole 3; (d) after the plugging of the preformed hole 3 is finished, sequentially performing the working procedures of stirrup binding, filler wall building, template supporting, concrete pouring and the like on the constructional column of the floor, and finally curing and forming the constructional column of the floor; (e) and then, constructing the constructional columns of the upper floor, wherein when the constructional columns of the upper floor are constructed, the lower ends of the main ribs 5 of the constructional columns are bound and connected with the upper ends of the main ribs 5 of the constructional columns which just extend into the middle position of the floor, the upper ends of the main ribs 5 of the constructional columns are extended into the middle position of the floor to be constructed of the upper floor in advance, and then the steps (c) and (d) are repeated in sequence until the constructional columns of all the floors of the building are constructed.
In the construction method of the constructional column, a positioning mechanism is arranged in advance when a main structural beam is constructed, an upper positioning hole and a lower positioning hole are formed at the bending end of a grouting pipe 2 in the positioning mechanism, the two positioning holes can limit the embedded rod 4, the embedded rod 4 is prevented from moving left and right after penetrating through the positioning holes and can only move vertically, and the embedded rod 4 is similar to be in sliding connection with the positioning holes, so that the positioning and the limiting of the embedded rod 4 are ensured, the embedded rod 4 can be conveniently pulled out upwards during the subsequent construction of the constructional column, other positioning supports are not needed for fixing the embedded rod 4, and the operation of workers is very simple; simultaneously the upper end of slip casting pipe 2 contacts in the roof beam side, and pre-buried stick 4 is extracted and is formed preformed hole 3 in main part roof beam 1 after, because slip casting pipe 2 communicates with each other with preformed hole 3, makes its slip casting pipe 2 have the effect of slip casting hole, therefore slip casting pipe 2 has the dual function of location and slip casting, slip casting pipe 2 and pre-buried stick 4 sliding connection in addition, and follow-up pre-buried stick 4 is extracted very laborsaving.
More importantly, a preformed hole 3 formed after the embedded rod 4 is pulled out is a vertical through hole in the main body beam 1, the diameter of the preformed hole 3 is larger than that of a main reinforcement 5 of the constructional column by about 4mm, and therefore the blanking length and the blanking mode of the main reinforcement 5 of the constructional column are correspondingly changed; meanwhile, when the constructional column is constructed, the construction is carried out from a low floor to a high floor, namely from bottom to top, half of the main constructional column reinforcements 5 of the previous floor are positioned in the floor, so that the half of the main constructional column reinforcements 5 are correspondingly fixed due to the completion of the construction of the constructional column below the floor, correspondingly, when the floor is constructed, the lower half of the main constructional column reinforcements 5 of the floor are positioned in the floor and are in reinforcement binding connection with the fixed main constructional column reinforcements 5, the upper half of the main constructional column reinforcements 5 of the floor also upwards penetrates through the reserved holes 3 to extend into the middle part of the floor to be constructed immediately above the floor, and by analogy, the upper half of the constructed main column reinforcements 5 extend into the floor, so that the main constructional column reinforcements 5 of the floor are not easy to be pulled out, and conventional reinforcement drawing tests are not needed to be carried out on the reinforcements, thus, the construction process of the constructional column is simplified, and the construction period is shortened; similarly, when the building is constructed, the upper half section of the main reinforcement 5 of the constructional column of the building can also extend into the middle position of the floor to be constructed of the upper building; the floor height of each floor is generally 2.8-3m, so the reinforcing steel bar joint for constructing the main reinforcement 5 of each floor is generally at the position of 1.4-1.5m, and the operation is very convenient for workers.
In a specific embodiment, each constructional column comprises four main bars 5, the four main bars 5 are rectangular in horizontal projection on the main body beam 1, four groups of positioning mechanisms are embedded in each main body beam 1, and four preformed holes 3 formed by four embedded rods 4 are respectively in one-to-one correspondence with the four main bars 5 of the constructional column.
Like this, in the normal work progress, every constructional column includes four main muscle 5, and every main muscle 5 all has corresponding preformed hole 3 on the roof beam, and during subsequent constructional column construction like this, only need every main muscle 5 pass corresponding preformed hole 3 can, need not readjust the position of constructional column main muscle 5 again, reduced the installation degree of difficulty of constructional column main muscle 5.
In a specific embodiment, in the step a, an X-shaped horizontal steel bracket 6 is arranged at the upper end of each of the four embedded rods 4 extending out of the top of the beam, and four end points of the steel bracket 6 are respectively and fixedly connected with the upper ends of the corresponding embedded rods 4, so that the four embedded rods 4 can be taken out of the main beam 1 through the steel brackets 6 when the embedded rods 4 are removed.
Thus, because the main body beam 1 is in the construction process, only two side dies and a bottom die are supported in the template engineering of the beam, the upper ends of the four embedded bars 4 can extend out of the top of the beam, the embedded bars 4 are convenient to find subsequently without marking, and the embedded bars 4 are also convenient to pull out; in addition, in order to deal with the tendency that the embedded rod 4 floats upwards under the buoyancy action of concrete when the concrete of the main body beam 1 is poured, a load can be added on the steel bracket 6, the embedded rod 4 is prevented from floating upwards, and the reserved hole 3 formed in the main body beam is ensured to be a through hole.
In a specific embodiment, when the embedded rod 4 is embedded in the step a, the embedded rod 4 is round steel wrapped with a layer of foam cotton, so that the round steel is more easily separated from the main body beam; the grouting pipe 2 is a steel pipe.
In this way, the embedded rod 4 is made of round steel, and the round steel is wrapped with a layer of foam cotton on the periphery of the round steel, so that the round steel can be prevented from directly contacting with concrete in the beam, and the surface of the round steel does not have crescent patterns, so that the round steel and the foam cotton can slide up and down, and a worker can save more labor when pulling out the embedded rod 4; the grouting pipes 2 are arranged to be steel pipes, so that the grouting pipes 2 are not prone to deformation caused by stress change of concrete in the beam, the positioning holes are formed in the steel pipes, the limiting rigidity of the embedded rods 4 can be guaranteed through the positioning holes formed in the steel pipes, the embedded rods 4 are not prone to left and right deflection caused by the stress change of the concrete, and the embedding accuracy of the embedded rods 4 is guaranteed.
In a specific embodiment, in the step a4, after the round steel is separated from the main body beam, the small-diameter round steel is used for removing foam cotton in the main body beam, and hole drilling is adopted for the partially blocked preformed hole 3.
Like this, because need the slip casting in the preformed hole 3, consequently need clear away the foam cotton in the preformed hole 3, the grout of pouring into in the preformed hole 3 like this can directly contact with the concrete of main part roof beam, and the main muscle 5 of constructional column is better with the concrete associativity in the main part roof beam like this.
In a specific embodiment, in the step b, when the steel bar joints of the main bars 5 of the construction column are bound, the binding joints of the four main bars 5 of the first-layer construction column are staggered and not positioned on the same horizontal plane.
Like this, when carrying out first floor constructional column construction, the ligature of four main muscle 5 connects and staggers each other not to be located same horizontal plane, then the normal unloading of reinforcement joint of follow-up floor, also can guarantee that reinforcement joint still can stagger in succession, accord with the construction standard requirement, the shear strength of reinforcing bar in the constructional column has been guaranteed, length when only needing the reinforcement unloading of first floor has the difference to some extent can, follow-up constructional column main muscle 5 length all according to the layer height on cell layer with reinforcement's overlap joint length unloading can.
In a specific embodiment, when the grout pipe 2 is positioned in step a2, the lower end of the grout pipe 2 is positioned between the middle of the side of the body girder and the bottom layer of steel bars in the body girder.
In this way, the positioning hole on the grouting pipe 2 is positioned between the middle-lower part of the beam height and the lower floor steel bar, namely the middle-lower part of the embedded bar 4, the steel support 6 is positioned at the top end of the embedded bar 4, and thus the positioning hole and the steel support 6 are respectively positioned at two sides of the middle part of the embedded bar 4, and the limiting effect on the embedded bar 4 is better; simultaneously, when the lower extreme of slip casting pipe 2 was located the middle part of main part roof beam and the bottom reinforcing bar between, the space was more sufficient when pre-buried slip casting pipe 2 in the roof beam like this, had made things convenient for the pre-buried of slip casting pipe 2.
In a specific embodiment, the preformed hole 3 corresponding to each layer of constructional column main reinforcement 5 is superposed with the vertical projection of the preformed hole 3 on the main beam of the upper floor or the main beam of the lower floor.
Therefore, the vertical direction of the main reinforcement 5 of the constructional column can be ensured, the verticality of the main reinforcement 5 of the constructional column is ensured, the error of the constructional column is smaller, and the stability of a masonry structure is better.
In the concrete implementation process, after the grouting pipe 2 is fixed in the step a2, a detachable upper cover is arranged on the upper end cover of the grouting pipe 2 to prevent the concrete of the main body beam from entering the grouting pipe 2 to block the grouting pipe 2, and when the grouting pipe 2 is grouted in the step c, the upper cover is opened.
In the specific implementation process, the upper end of the grouting pipe can be positioned on the side surface of the main body beam or the top surface of the main body beam; when the height of the main body beam is 30-50 cm, the upper end of the grouting pipe can extend out of the beam top due to the low height of the main body beam, so that grouting can be directly performed on the floor when the grouting pipe is grouted, and the operation is convenient; when the beam height of the main body beam is 50cm-70cm, the beam height of the main body beam is higher, so that the length of the grouting pipe is reduced in order to avoid the displacement of the grouting pipe in the concrete pouring process, the upper end of the grouting pipe can be located in the middle of the side face of the main body beam, and the stability of the grouting pipe can be guaranteed.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A constructional column construction method is characterized in that: comprises the following steps of (a) carrying out,
(a) during the main beam construction stage before constructional column construction, measurement paying-off is carried out according to construction drawings, and a reserved hole into which a main rib is inserted during subsequent constructional column construction is formed on each layer of main beam; (a1) firstly, acquiring a positioning mechanism for forming a reserved hole, wherein the positioning mechanism comprises a vertical embedded rod and an obliquely arranged grouting pipe, the lower end of the grouting pipe is provided with a horizontal bending end, and the upper end of the grouting pipe is abutted against a main beam side mold; the end opening of the bending end is closed, the upper pipe wall and the lower pipe wall of the bending end are provided with two positioning holes which are coaxial and allow the lower end of the embedded rod to vertically penetrate through, and the aperture of each positioning hole is matched with the outer diameter of the embedded rod; (a2) then after the positions of two positioning holes in the grouting pipe are detected to be matched with the positions of corresponding main reinforcements of the constructional column on the drawing, the grouting pipe is fixedly connected to the reinforcements of the main body beam, then the lower end of the embedded rod vertically penetrates through the two positioning holes and then reaches the bottom of the main body beam, the upper end of the embedded rod extends out of the top elevation of the main body beam, embedding of a positioning mechanism is completed, and the outer diameter of the embedded rod is larger than the diameter of the main reinforcements of the constructional column; (a3) pouring main body beam concrete, and maintaining to complete the main body structure; (a4) when the secondary structure constructional column is constructed, the embedded rod in the beam is pulled out, after the embedded rod is taken out, a reserved hole for the main rib of the constructional column to pass through is formed in the main beam, the reserved hole is cleaned, the reserved hole is guaranteed to be smooth, and blanking of the main rib of the constructional column is waited;
(b) blanking a main reinforcement of the constructional column, wherein the middle position of the constructional column in the length direction is positioned in the reserved hole, and the two ends of the constructional column are respectively positioned in the middle positions of two adjacent floors; when the building is blanked, the lower end of the main reinforcement of the constructional column of the building is bound and connected with the upper end of the main reinforcement of the constructional column of the completed lower floor, which extends into the middle position of the building, and the upper end of the main reinforcement of the constructional column of the building extends upwards in advance into the middle position of the upper floor to be constructed to wait for the binding and connection of the lower end of the main reinforcement of the constructional column of the building, so that the steel bar blanking of the constructional column of the building is completed;
(c) the grouting pipe is communicated with the preformed hole, and flexible caulking materials are injected into the pipe orifice of the grouting pipe on the top side surface of the main body beam of the layer to block the preformed hole until slurry is discharged from the top end of the preformed hole, so that grouting is completed;
(d) after the preformed hole is plugged, sequentially performing the processes of binding stirrups of the constructional column, building a filler wall, erecting a template and pouring concrete, and finally curing and forming the constructional column of the floor;
(e) then, constructing the constructional columns of the upper floor, binding and connecting the lower ends of the main ribs of the constructional columns with the upper ends of the main ribs of the constructional columns which just extend into the middle position of the floor, extending the upper ends of the main ribs of the constructional columns into the middle position of the floor to be constructed of the upper floor in advance, and repeating the steps (c) and (d) in sequence until the construction of the constructional columns of all floors of the multi-storey building is completed;
each constructional column comprises four main bars, the horizontal projection of the four main bars on the main body beam is rectangular, four groups of positioning mechanisms are embedded in each main body beam, and four preformed holes formed by the four embedded bars are respectively in one-to-one correspondence with the four main bars of the constructional column;
in the step a, an X-shaped horizontal steel support is arranged at the upper end of each of the four embedded rods extending out of the top of the beam, and four end points of each steel support are respectively and fixedly connected with the upper end of the corresponding embedded rod, so that the four embedded rods can be taken out of the main beam through the steel supports together when the embedded rods are dismounted; the load is added on the steel support, the embedded rod is prevented from floating upwards, and the preformed hole formed in the main body beam is guaranteed to be a through hole.
2. The construction method of a constructional column as set forth in claim 1, wherein: when embedding the embedded rod in the step a, the embedded rod is round steel wrapped with a layer of foam cotton so that the round steel is easier to separate from the main body beam; the grouting pipe is a steel pipe.
3. The construction method of a constructional column as set forth in claim 2, wherein: in the step a4, after the round steel is separated from the main body beam, the small-diameter round steel is used for removing foam cotton in the main body beam, and hole drilling is adopted for the partially blocked preformed hole.
4. The construction method of a constructional column as set forth in claim 1, wherein: in the step b, when the steel bar joints of the main bars of the constructional column are bound, and when four main bars of the constructional column of the first floor are blanked, the four binding joints are staggered and are not positioned on the same horizontal plane.
5. The construction method of a constructional column as set forth in claim 1, wherein: when the grout pipe is positioned in step a2, the lower end portion of the grout pipe is positioned between the middle of the side of the body girder and the underlying steel reinforcement inside the body girder.
6. The construction method of a constructional column as set forth in claim 1, wherein: the preformed hole that every layer of constructional column owner muscle corresponds all coincides with the vertical projection of preformed hole on the main body roof beam of upper storied building or the main body roof beam of lower floor.
7. The construction method of a constructional column as set forth in claim 1, wherein: and c, after the grouting pipe is fixed in the step a2, arranging a detachable upper cover on the upper end cover of the grouting pipe to prevent the concrete of the main body beam from entering the grouting pipe to block the grouting pipe, and opening the upper cover when the grouting pipe is grouted in the step c.
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| CN112031273B (en) * | 2020-09-07 | 2022-04-19 | 华创建筑设计有限公司 | Fabricated building constructional column and construction method thereof |
| CN117888678A (en) * | 2024-01-12 | 2024-04-16 | 广东建邦兴业集团有限公司 | Novel constructional column |
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