CN212388856U - Cast-in-place clear water concrete batter post structure of prestressing force - Google Patents
Cast-in-place clear water concrete batter post structure of prestressing force Download PDFInfo
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- CN212388856U CN212388856U CN202020741517.7U CN202020741517U CN212388856U CN 212388856 U CN212388856 U CN 212388856U CN 202020741517 U CN202020741517 U CN 202020741517U CN 212388856 U CN212388856 U CN 212388856U
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Abstract
The utility model discloses a prestressed cast-in-situ clear water concrete inclined column structure, which comprises a concrete inclined column body, wherein the concrete inclined column body comprises a steel reinforcement framework and a concrete structure poured and formed along the steel reinforcement framework; the prestressed tendons are distributed on the inner side of the steel reinforcement framework and are longitudinally and uniformly distributed along two inclined side edges of the steel reinforcement framework, and each prestressed tendon is composed of a plurality of prestressed tendons; the column top embedded part comprises an installation part connected with the steel reinforcement framework, a top plate fixedly connected with the installation part and located at the top end of the concrete inclined column body, and a pouring hole and an air vent are formed in the top plate. The utility model discloses an increase prestressing tendons and make the concrete batter post greatly improve its bearing capacity, exert the performance of concrete in the batter post better, simultaneously relative shaped steel concrete batter post reduces and uses the steel volume.
Description
Technical Field
The utility model relates to a cast in situ concrete technical field especially relates to a cast-in-place clear water concrete batter post structure of prestressing force.
Background
With the continuous pursuit of building modeling in the building industry, concrete members with various special shapes are continuously emerged in building structures. The batter post is a common modeling component, and the appearance of a building and the appearance of the post are changed through different designs.
In the evolution of the design of the batter post and the building, the cross section size of the batter post is continuously reduced, which affects the bearing capacity of the batter post, but in the process of building arrangement, under the pursuit of a large-span space, the cross section size of the batter post as a building supporting member is difficult to balance the contradiction between modeling and stress calculation.
The large-scale venue adopts large-span space structure steel as the roof, and the independent structural column used for supporting the roof is a reinforced concrete batter post. Because the center of the inclined column deviates from the column top and the column foot, the inclined column cannot better exert the axle center stress of concrete due to the nature of the inclined column, and is difficult to bear larger load. At present, most building structures adopt the steel reinforced concrete inclined column to improve the bearing capacity of the steel reinforced concrete inclined column, but the steel reinforced concrete structures often find that the steel reinforced column core conflicts with the steel bar, the installation process is difficult, the installation quality is difficult to ensure, and the stress performance is finally influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a cast-in-place clear water concrete batter post structure of prestressing force, improve the bearing capacity of concrete.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a cast-in-place clear water concrete batter post structure of prestressing force, includes:
the concrete inclined column body comprises a steel reinforcement framework and a concrete structure poured and formed along the steel reinforcement framework;
the prestressed tendons are distributed on the inner side of the steel reinforcement framework and are longitudinally and uniformly distributed along two inclined side edges of the steel reinforcement framework, and each prestressed tendon is composed of a plurality of prestressed tendons;
the column top embedded part comprises an installation part connected with the steel reinforcement framework and a top plate fixedly connected with the installation part and positioned at the top end of the concrete inclined column body, and a pouring hole and an air vent are formed in the top plate;
and a gap is formed between the bottom of the top plate and the top end of the concrete inclined column body, and the grouting layer is poured in the gap.
Optionally, the bottom of prestressing tendons for bury underground in stiff end in the concrete batter post substructure, the stiff end is the supporting first fixed part that is connected with respectively, first fixed part overlaps including from top to bottom establishing in proper order first spiral muscle, first pressure-bearing backing plate and the extrusion ground tackle on the prestressing tendons, the top of prestressing tendons restraints for set up in the tensioning end at concrete batter post top of the body post, tensioning end is supporting connection with second fixed part respectively, second fixed part includes by lower supreme establishing in proper order second spiral muscle, second pressure-bearing backing plate and the porous ground tackle on the prestressing tendons restraints, porous ground tackle bury underground in the grout layer.
Optionally, the number of the prestressed tendons of the concrete inclined column body is the same and the positions of the prestressed tendons are symmetrical, and the number of the prestressed tendons of each prestressed tendon at one side of the concrete inclined column body, which forms an acute angle with the ground, is less than the number of the prestressed tendons of each prestressed tendon at one side of the concrete inclined column body, which forms an obtuse angle with the ground.
The utility model discloses owing to adopt above-mentioned technical scheme, make it have following beneficial effect:
1. the concrete batter post greatly improves the bearing capacity by adding the prestressed tendons, better exerts the performance of concrete in the batter post, and simultaneously reduces the steel consumption of the relative steel reinforced concrete batter post.
2. The utility model discloses well construction method adopts the support system reasonable, easy operation.
3. Under the condition that reinforcing bars in the concrete batter post are dense and the construction content is large, the reinforcing bars can be accurately positioned, the installation of all components in the concrete batter post and the smooth implementation of concrete pouring are ensured, the good appearance and quality of the batter post are ensured, and the effect of fair-faced concrete is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows the overhead structure schematic view of the prestressed cast-in-place clear water concrete batter post structure of the embodiment of the present invention.
Fig. 2 shows the front structure diagram of the cast-in-place clear water concrete batter post structure of prestressing force of the embodiment of the utility model.
Fig. 3 shows a schematic structural diagram of a first implementation step of the embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of a fourth implementation step of the embodiment of the present invention.
Fig. 5 is a schematic front structural diagram illustrating a fifth implementation step according to an embodiment of the present invention.
Fig. 6 shows a schematic side structure diagram of the fifth implementation step of the embodiment of the present invention.
Fig. 7 is a schematic top view of the fifth implementation step of the embodiment of the present invention.
Fig. 8 shows a schematic top view of a positioning stirrup in an embodiment of the present invention.
Fig. 9 shows a perspective view of the dustpan hopper in the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the utility model discloses cast-in-place clear water concrete batter post structure of prestressing force, including concrete batter post body 1, prestressing force muscle bundle 3, capital embedded 4 and grout blanket 5, wherein:
the concrete inclined column body 1 comprises a steel reinforcement framework 2 and a concrete structure cast along the steel reinforcement framework 2; the plurality of prestressed tendons 3 are distributed on the inner side of the steel reinforcement framework 2 and are longitudinally and uniformly distributed along two inclined side edges of the steel reinforcement framework 2, and the plurality of prestressed tendons 3 are respectively composed of a plurality of prestressed tendons 31; the column top embedded part 4 comprises an installation part connected with the steel reinforcement framework 2 and a top plate which is fixedly connected with the installation part and is positioned at the top end of the concrete inclined column body 1, and a pouring hole 41 and a vent hole 42 are formed in the top plate; and a grouting layer 5 is poured in a gap formed by the bottom of the top plate and the top end of the concrete inclined column body 1.
The concrete batter post greatly improves the bearing capacity by adding the prestressed tendons, better exerts the performance of concrete in the batter post, and simultaneously reduces the steel consumption of the relative steel reinforced concrete batter post.
In this embodiment, the steel reinforcement framework 2 is built according to the shape of the concrete batter post to be poured, so that the concrete batter post body 1 can be shaped according to the appearance of the concrete batter post to be poured. The steel reinforcement framework 2 is mainly a cage body formed by longitudinal bars 21 and stirrups 22, the longitudinal bars 21 are uniformly arranged along the side line of the concrete inclined column body 1, and a steel reinforcement protective layer with the thickness not less than 3cm is formed on the outer surface of a poured concrete structure and the side edge of the steel reinforcement framework 2. The closed stirrups are arranged along the outer sides of the longitudinal reinforcements 21, and the rest stirrups 22 are required to be arranged according to the shape of the cross section of the concrete batter post.
In this embodiment, the tendon 31 is a slowly bonded tendon 31, and the process is simple, the installation and arrangement are flexible, and the bonding performance is good under the condition that the longitudinal bar 21 and the stirrup 22 are very dense. The prestressed reinforcement bundles 3 are respectively composed of a plurality of prestressed reinforcements 31, the bottom ends of the prestressed reinforcements 31 are fixed ends embedded in the lower layer structure of the concrete inclined column body 1, the fixed ends are respectively and cooperatively connected with first fixing parts, the first fixing parts comprise first spiral reinforcements, first pressure-bearing base plates and extrusion anchors (not shown) which are sequentially sleeved on the prestressed reinforcements 31 from top to bottom, the top ends of the prestressed reinforcement bundles 3 are tensioning ends arranged at the top of the concrete inclined column body 1, the tensioning ends are respectively and cooperatively connected with second fixing parts, the second fixing parts comprise second spiral reinforcements 33, second pressure-bearing base plates 32 and porous anchors which are sequentially sleeved on the prestressed reinforcement bundles 3 from bottom to top, and the porous anchors are embedded in the grouting layer 5. And the prestressed tendons 3 arranged at the two sides of the concrete oblique cylinder 1 are the same in number and symmetrical in position, as shown in fig. 1, the number of the prestressed tendons 31 of each prestressed tendon 3 at one side of the concrete oblique cylinder 1 forming an acute angle with the ground is less than the number of the prestressed tendons 31 of each prestressed tendon 3 at one side of the concrete oblique cylinder 1 forming an obtuse angle with the ground.
In this embodiment, the top end of the inclined concrete column 1 is provided with a column top embedded part 4, the column top embedded part 4 is equivalent to a measure steel bar for connecting an upper-end external steel structure bottom support, and the column top embedded part 4 is provided with a plurality of pouring holes 41 and air holes 42 for pouring the concrete structure of the inclined concrete column 1. The reserved clearance between the roof of piece 4 is buried to the capital and the batter post concrete top is about 50mm, and grout blanket 5 does not have shrink grout material for the high strength and seals this reserved clearance and form for when the clearance between the closely knit capital piece 4 and the concrete, still fill the anchor sealing recess that 1 top of concrete batter post is used for prestressing force muscle bundle 3.
Construction the utility model discloses a cast-in-place clear water concrete batter post of prestressing force of embodiment time includes following step:
step S1, as shown in fig. 3, the column base longitudinal rib 211, the prestressed rib 31 and the fixed end of the prestressed rib 31 are embedded when constructing the lower structure of the concrete batter post, the column base longitudinal rib 211 and the lower structure column are mechanically connected, and the straight thread connection is used to install in a positive and negative thread manner, so that the problem of installation failure is avoided. The fixed end of the tendon 31 is connected with a first fixing component embedded in the lower mechanism, and the first fixing component comprises a first spiral tendon, a first pressure bearing backing plate and an extrusion anchor (not shown) which are sequentially sleeved on the tendon 31 from top to bottom. Wherein the embedded depth of the tendon 31 is not less than 1.5 m.
Since the angle of each column base longitudinal rib 211 is not uniform, the column base longitudinal rib 211 needs to be positioned by the positioning stirrup 23. The post foot is indulged muscle 211 and is being measured and confirm the mounted position after, indulge a plurality of location stirrup 23 of ligature in order to reach the rigidity on the muscle 211 at the post foot, and electric welding welded fastening, location stirrup 23 adopts the reinforcing bar more than diameter 16, suitably carry out the segmentation to location stirrup 23 with reinforcing bar quantity according to the shape in post cross-section, and indulge the vertical every interval 1m left and right sides ligature outer hoop formula location stirrup 23 of muscle 211 along the post foot, thereby it is accurate to indulge the mounted position of muscle 211 with guaranteeing every post foot, location stirrup 23 structure is as shown in figure 8.
Before the step S1 is performed, computer software is used to perform auxiliary lofting on the structure of the concrete batter post, so as to determine the space requirement of each component (including embedded parts, reinforcing steel bars, prestressed tendons 31 and anchorage devices thereof) in the dense space in the batter post, and at the same time, the construction materials (longitudinal bar reinforcing steel bars, binding reinforcing steel bars, prestressed tendons, batter post forming templates, diagonal braces, buttresses and the like) are processed. Wherein: bending, segmenting, processing and threading the longitudinal bars 21 according to the angle of each steel bar, classifying and stacking, and correspondingly numbering each steel bar according to the installation position of the steel bar; each prestressed tendon 31 is processed according to the whole length of the concrete batter post, and the length of each prestressed tendon 31 is properly prolonged by considering the bottom embedded length and the top tensioning length; the batter post template adopts a customized steel mould, and the steel mould panel adopts a steel plate; the secondary ridges 72 are made of small-specification channel steel and are longitudinally arranged; as shown in fig. 5, the main ridge 71 is horizontally arranged by double-spliced large-size channel steel, the template fragments are connected by reinforcing screws in the horizontal direction and are connected by flanges in the longitudinal direction; a discharge hole 82 for pouring concrete is arranged at the top die of the batter post template, and is arranged every 3m and has the size of 300 multiplied by 300 mm; simultaneously, a discharge hole 82 template and a dustpan 81 matched with the discharge hole 82 are processed, and the structure of the dustpan 81 is shown in FIG. 9; the inclined column template is mainly supported and fixed through a plurality of inclined strut 61 rod pieces, and brackets 65 of double steel plates for connecting the inclined strut 61 are arranged on the periphery of the template; as shown in fig. 5, the inclined strut 61 is a phi 60 steel pipe, one end of the inclined strut is connected with the buttress 63 through a bolt, the other end of the inclined strut is welded with a matched nut and connected with a phi 48 screw 64 to achieve the effect of telescopic length of the rod, and the screw 64 is connected with the middle of the double steel plates of the bracket 65 through a bolt.
Step S2, installing the formwork and the formwork diagonal brace 61 on the side where the concrete diagonal brace and the ground form an acute angle, as shown in fig. 5 and 7, specifically including:
s201, installing a plurality of buttresses 63 for installing the bottom of the formwork diagonal brace 61 on the ground, wherein the installation positions of the buttresses 63 need to correspond to the length of the diagonal brace 61, so that the included angle between the diagonal brace 61 and the horizontal plane is not less than 60 degrees;
s202, cleaning the inner side surface of the template and coating a release agent;
s203, installing a template;
s204, adjusting the length of the template inclined strut 61 by rotating the screw 64 so as to adjust the inclination angle required for connecting the template, and connecting and fixing the bracket 65 on the template and the top of the corresponding template inclined strut 61;
s205, transversely arranged connecting rods 62 are installed between the formwork inclined struts 61 on the same side, and the installation interval of the connecting rods 62 is about 1.5 m.
Step S3, on column base indulges muscle 211, install upper portion and indulge the muscle and carry out stirrup 22 ligature formation concrete batter post' S framework of steel reinforcement 2 to upper portion indulges the muscle, upwards take up prestressing tendons 31 simultaneously and be fixed in on framework of steel reinforcement 2 with prestressing tendons 31, specifically include:
s301, according to the number of each longitudinal bar 21 steel bar during the construction material processing, an upper longitudinal bar is arranged at the upper end of the column base longitudinal bar 211 and connected through a straight thread sleeve joint, the joint percentage is not more than 50%, and if the processing forming cannot meet the joint percentage requirement, a first-level joint can be adopted.
And S302, erecting a steel pipe operating frame along the periphery of the concrete batter post.
And S303, installing a positioning steel pipe at the position of the steel pipe operation frame corresponding to the elevation corresponding to each row of upper longitudinal ribs.
S304, under the auxiliary positioning effect of the positioning steel pipe, the upper longitudinal bars are accurately adjusted to the designed installation position by using tools such as cloth belts and the like.
S305, the stirrups 22 are sleeved from the upper ends of the upper longitudinal bars to sequentially bind the upper longitudinal bars from bottom to top to form a steel reinforcement framework 2, and steel reinforcement protective layer cushion blocks are bound at intervals of 1m around the stirrups 22 of the cage body of the steel reinforcement framework 2.
S306, upwards strain prestressing tendons 31 and lie in 2 tops of framework of steel reinforcement department installation pressure-bearing backing plate 32 at prestressing tendons 31 to carry out the ligature with prestressing tendons 31 and framework of steel reinforcement 2 fixedly, every 1m is left and right fixed with prestressing tendons 31 at the top to the middle part on the vertical direction of framework of steel reinforcement 2, and the mode of forbidding to adopt the electric welding is fixed.
Step S4, installing the column top embedded part 4 at the top end of the steel reinforcement framework 2, as shown in fig. 4, the column top embedded part 4 includes an installation part for installing with the steel reinforcement firmware and a top plate fixedly arranged at the upper end of the installation part, wherein a reserved gap is arranged between the bottom of the top plate and the top end of the steel reinforcement framework 2, and two pouring holes 41 and two vent holes 42 are reserved on the column top embedded part 4, so as to smoothly pour the concrete and grouting material at the later stage.
Before the column top embedded part 4 is installed, the bent anchor section of the upper longitudinal reinforcement column top should avoid the space of the column top embedded part 4, if avoiding measures cannot be taken, the bent anchor section steel bar of the part which conflicts with the column top embedded part 4 is cut off, and after the column top embedded part 4 is installed and fixed, a steel bar net with the same specification as the binding is laterally inserted into the elevation position of the upper longitudinal reinforcement bent anchor section for reinforcement.
Step S5, installing the remaining formwork and formwork diagonal brace 61 on each side of the concrete diagonal column, as shown in fig. 5, 6 and 7, the specific steps are the same as those of S201 to S205, which are not described herein again. And vibrators 9 are installed and fixed to the outer surfaces of the bottom and middle portions in the vertical direction of the formwork.
Step S6, pouring concrete in the formwork space formed by the four-side formworks, and the concrete pouring method specifically comprises the following steps:
s601, pouring cement mortar on the outer rings of the bottoms of the four-side formworks, wherein the pouring height is at least 5cm, so that bottom slurry leakage is prevented when concrete is poured subsequently.
S602, inserting a soft corrugated pipe with the diameter of 100mm into the steel reinforcement framework 2 before concrete pouring, forming a groove with the width of 70mm on the surface of the corrugated pipe, placing a vibrating rod with the width of 50mm into the groove, and keeping the vibrating rod in the corrugated pipe along with lifting. Meanwhile, the corrugated pipe is used as a string cylinder during pouring, and base mortar and bottom concrete are conveyed downwards.
S603, pouring concrete into the space of the template sequentially through a plurality of discharge ports 82 formed in the template from bottom to top, wherein the concrete is self-compacting concrete, the slump of the concrete is 210-230 mm, and the expansion degree of the concrete is 370-450 mm.
And S604, when the concrete is poured to the height of the discharge hole 82, blocking the discharge hole 82 at the height until the top end of the steel pipe framework is poured, and when the top end is poured, pouring is carried out through the pouring hole 41 in the column top embedded part 4.
When the strength of the concrete structure reaches the strength required by form removal, the form boards except the form board on the side forming an acute angle with the ground are removed, and the concrete surface is sprayed with water and then wrapped by a covering film for about two weeks.
And step S7, when the concrete strength of the concrete batter post reaches a tensioning condition, installing a prestressed anchorage device at the top end of the prestressed tendon 31 and tensioning, and after tensioning is finished, cutting off the exposed prestressed tendon 31 by a mechanical method.
And S8, installing a hanging mould in a reserved gap between the bottom of a top plate of the column top embedded part 4 and the top end of the steel reinforcement framework 2, and pouring a grouting layer 5 in a hanging mould space, wherein the hanging mould can be made of a customized steel mould or a common wood mould, and nails driven into the surface of the inclined column concrete at the bottom of the hanging mould can be used as temporary supporting.
And finally, removing the templates on the rest side to finish construction.
It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the equivalent embodiment without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (3)
1. The utility model provides a cast-in-place clear water concrete batter post structure of prestressing force which characterized in that includes:
the concrete inclined column body comprises a steel reinforcement framework and a concrete structure poured and formed along the steel reinforcement framework;
the prestressed tendons are distributed on the inner side of the steel reinforcement framework and are longitudinally and uniformly distributed along two inclined side edges of the steel reinforcement framework, and each prestressed tendon is composed of a plurality of prestressed tendons;
the column top embedded part comprises an installation part connected with the steel reinforcement framework and a top plate fixedly connected with the installation part and positioned at the top end of the concrete inclined column body, and a pouring hole and an air vent are formed in the top plate;
and a gap is formed between the bottom of the top plate and the top end of the concrete inclined column body, and the grouting layer is poured in the gap.
2. The prestressed cast-in-place clear water concrete batter post structure of claim 1, characterized in that: the bottom of prestressing tendons for bury underground in the stiff end in the concrete batter post substructure, the stiff end is the supporting first fixed part that is connected with respectively, first fixed part overlaps including from top to bottom establishing in proper order first spiral muscle, first pressure-bearing backing plate and the extrusion ground tackle on the prestressing tendons, the top of prestressing tendons restraints is for setting up in the tensioning end at concrete batter post top of the body post, tensioning end is supporting connection with second fixed part respectively, the second fixed part includes by lower supreme establishing in proper order second spiral muscle, second pressure-bearing backing plate and porous ground tackle on the prestressing tendons restraints, porous ground tackle bury underground in the grout layer.
3. The prestressed cast-in-place clear water concrete batter post structure of claim 1, characterized in that: the prestressed reinforcement bundles are arranged on two sides of the concrete inclined cylinder body, the number of the prestressed reinforcement bundles is the same, the positions of the prestressed reinforcement bundles are symmetrical, and the number of the prestressed reinforcement bundles on one side of the concrete inclined cylinder body, which forms an acute angle with the ground, is less than that of the prestressed reinforcement bundles on one side of the concrete inclined cylinder body, which forms an obtuse angle with the ground.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111424883A (en) * | 2020-05-08 | 2020-07-17 | 中国建筑第八工程局有限公司 | Prestressed cast-in-place clear water concrete inclined column structure and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111424883A (en) * | 2020-05-08 | 2020-07-17 | 中国建筑第八工程局有限公司 | Prestressed cast-in-place clear water concrete inclined column structure and construction method thereof |
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