CN111502117A - Large-section row reserved hole building structure on prestressed structural beam and construction method - Google Patents
Large-section row reserved hole building structure on prestressed structural beam and construction method Download PDFInfo
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- CN111502117A CN111502117A CN202010265701.3A CN202010265701A CN111502117A CN 111502117 A CN111502117 A CN 111502117A CN 202010265701 A CN202010265701 A CN 202010265701A CN 111502117 A CN111502117 A CN 111502117A
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- structural beam
- prestressed
- section
- reserved hole
- stirrups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
Abstract
The invention discloses a large-section row reserved opening building structure on a prestressed structural beam and a construction method thereof. The combined embedded system is tightly connected with the steel bar system in the prestressed structural beam, so that the safety and the rapidness of the prestressed structural beam with the large-section row reserved holes during construction are ensured.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to a large-section row reserved hole building structure on a prestressed structural beam and a construction method.
Background
Along with the development of modern buildings, the functions of the buildings are more and more diversified, a plurality of large-scale modern buildings have multiple electromechanical systems, various pipelines are huge in quantity and very complex in arrangement, the huge electromechanical systems occupy a large amount of space of the buildings, and the reasonable and sufficient reserved holes can enable the pipelines to be more reasonable in arrangement, so that the utilization efficiency of the internal space of the buildings is improved.
The prestressed structural beams have high structural stability requirement and great difficulty in reserving holes, so that the reserved holes in the prestressed structural beams of most of the prior buildings are small in size and small in quantity, the electromechanical pipelines are difficult to arrange, and the utilization rate of the internal space of the buildings is low.
Therefore, it is necessary to provide a construction method for a large-section row-reserved opening in a prestressed structural beam, which ensures the safety and rapidness of the construction of the prestressed structural beam with the large-section row-reserved opening.
Disclosure of Invention
In order to solve the defects existing in the prior art, the invention provides a building structure with rows of reserved holes with large sections on a prestressed structural beam and a construction method.
The technical scheme adopted by the invention is as follows: the utility model provides a entrance to a cave building structure is reserved in large cross-section in bank on prestressed structure roof beam which characterized in that: the combined pre-buried system comprises a pre-stressed structural beam and is characterized in that rows of pre-stressed structural beams are equidistantly combined in the length direction of the pre-stressed structural beam, the combined pre-buried system comprises a steel sleeve formed with a large-section reserved hole and reinforcing stirrups welded to the outer portion of the steel sleeve, the reinforcing stirrups are welded to beam reinforcements of the pre-stressed structural beam, unbonded prestressed reinforcements are buried in the length direction of the pre-stressed structural beam, and the unbonded prestressed reinforcements are symmetrically distributed on the upper side and the lower side of the steel sleeve.
The building structure is further improved in that the number of the large-section reserved holes on each prestressed structural beam is 5, the sections of the large-section reserved holes are rectangles with the length of 500mm and × 350mm, and the depth of each large-section reserved hole is equal to the width of each prestressed structural beam.
The building structure is further improved in that the beam steel bars of the prestressed structural beam comprise stressed steel bars arranged in a full length mode and beam stirrups bound on the stressed steel bars.
The building structure of the present invention is further improved in that the diameter and the number of limbs of the reinforcement stirrup are the same as those of the beam stirrup.
A further improvement of the building structure of the present invention is that the spacing of the reinforcement stirrups is smaller than the spacing of the beam stirrups.
The building structure is further improved in that a plurality of encrypted stirrups are welded on the beam reinforcing steel bars on two sides of the reserved hole with the large cross section, and the distance between the encrypted stirrups is smaller than that between the reinforced stirrups.
A construction method for a large-section row reserved hole building on a prestressed structural beam is characterized by comprising the following steps:
manufacturing a steel sleeve with a reserved hole with a large cross section, and welding a reinforcing stirrup outside the steel sleeve to form a combined embedded system;
mounting a bottom die of the prestressed structural beam and binding beam reinforcing steel bars, arranging a plurality of combined embedded systems in rows at equal intervals along the length direction of the prestressed structural beam, and welding and fixing the combined embedded systems with the beam reinforcing steel bars;
embedding unbonded prestressed reinforcements in the prestressed structural beam in the length direction, wherein the unbonded prestressed reinforcements are symmetrically distributed on the upper side and the lower side of the steel sleeve;
erecting a beam side mold of the prestressed structural beam to finish the concrete pouring of the prestressed structural beam;
and (4) dismantling the beam side die, and performing tensioning construction of the unbonded prestressed reinforcement.
The combined embedded system is tightly connected with the steel bar system in the prestressed structural beam, so that the safety and the rapidness of the prestressed structural beam with the large-section row reserved holes during construction are ensured.
The construction method is further improved in that when the steel bars of the prestressed structural beam are bound, a plurality of encrypted stirrups are arranged on the left side and the right side of each large-section reserved hole, and the distance between the encrypted stirrups is smaller than that between the reinforced stirrups.
The construction method is further improved in that a plurality of reinforcing stirrups are symmetrically arranged at the bottom and the top of the steel sleeve, the reinforcing stirrups are U-shaped or inverted U-shaped, and two ends of the opening side are respectively welded at the bottom or the top of the steel sleeve.
The construction method is further improved in that the deviation of the elongation value of the unbonded prestressed reinforcement is controlled within +/-6% in the process of tensioning the unbonded prestressed reinforcement.
According to the invention, the combined embedded system is arranged in the prestressed structural beam, so that rows of large-section reserved holes are formed in the prestressed structural beam, and the prestressed structural beam has the characteristics of high safety, low manufacturing cost, quick construction and the like. The method comprises the following steps: the combined pre-buried system comprises reinforcement stirrups and a steel sleeve, the large-section reserved hole is rectangular in shape and arranged in rows, and the combined pre-buried system is the same in size, height and distance. The combined embedded system is tightly connected with the steel bar system in the prestressed structural beam, so that the prestressed structural beam with the large-section row reserved holes is safe and quick in construction.
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 introduced 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 based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a large-section row-reserved hole building structure on a prestressed structural beam according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a combined pre-buried system in the embodiment of the present invention.
The correspondence of the symbols in the drawings is as follows:
the method comprises the following steps of 1-prestressed structural beam, 2-combined embedded system, 3-large-section reserved hole, 4-beam stirrup, 5-unbonded prestressed reinforcement, 6-stressed reinforcement, 7-concrete, 8-reinforced stirrup, 9-steel sleeve, 10-long-side steel plate, 11-short-side steel plate and 12-encrypted stirrup.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The invention is described in further detail below with reference to the figures and specific examples.
Referring to fig. 1 and 2, an embodiment of the present invention provides a large-section row reserved opening building structure on a prestressed structural beam and a method thereof, and as shown in the figures, the large-section row reserved opening building structure on the prestressed structural beam mainly includes three major parts, namely a prestressed structural beam 1, a combined embedded system 2, and a large-section reserved opening 3. The prestressed structural beam 1 comprises common beam stirrups 4, unbonded prestressed reinforcements 5, common stressed reinforcements 6 and cast-in-place concrete 7. The combined embedded system 2 comprises a reinforcement stirrup 8 and a steel sleeve 9. The large-section reserved holes 3 are formed in the steel sleeve 9, are rectangular, are arranged in rows along the length direction of the prestressed structural beam 1, and are identical in size, height and distance. Further, the total length of the prestressed structural beam 1 is 9000mm, the total height is 1000mm, and the total width is 300 mm. The number of the large-section reserved holes 3 on each prestressed structural beam 1 is 5, the sections of the large-section reserved holes are rectangles with the length of 500mm and the width of 350mm, and the depth of the large-section reserved holes is equal to the width of the prestressed structural beam 1.
As shown in fig. 2, the combined embedded body 2 is formed by welding and connecting the reinforcement stirrup 8 and the steel sleeve 9, and the diameter and the number of the limbs of the reinforcement stirrup 8 are the same as those of the common beam stirrup 4. The steel sleeve 9 can be further formed by welding and connecting 2 short-side steel plates 11 and 2 long-side steel plates 10, wherein the short-side steel plates 11 are 350mm long, 300mm wide and 10mm thick, and the long-side steel plates 10 are 500mm long, 350mm wide and 10mm thick. A method for constructing a building structure with large-section row reserved holes on a prestressed structural beam is characterized in that a combined embedded system 2 is tightly connected with a steel bar system in a prestressed structural beam 1, so that safety and rapidness in construction of the prestressed structural beam with the large-section row reserved holes are guaranteed. The specific method comprises the following steps: the reinforcement stirrup 8 of the combined embedded system 2 is welded and fixed on the stressed steel bars 6 of the prestressed structural beam 1, a plurality of reinforcement stirrups 12 are welded on the stressed steel bars 6 on two sides of the large-section reserved hole, the distance between the reinforcement stirrups 12 is smaller than that between the reinforcement stirrups 8, and the distance between the reinforcement stirrups 8 is smaller than that between the ordinary beam stirrups 4 of the prestressed structural beam 1. The prestressed structural beam is embedded with unbonded prestressed reinforcements 5 in the length direction, and the unbonded prestressed reinforcements 5 are symmetrically distributed on the upper side and the lower side (not connected with the reinforcement stirrups) of the steel sleeve 4.
The invention relates to a concrete method for implementing a building structure with large sections and rows of reserved holes on prestressed structural beams, which comprises the following steps:
first, steel plate processing and steel sleeve manufacturing are performed. The thickness of the steel plate is 10mm, the processing size is 500mm long and 350mm wide long side steel plate 10, 350mm long and 300mm wide short side steel/11. The steel plate is cut by flame, and the required size is accurate, and the cut is straight. Each steel sleeve 9 is welded and connected by two long-edge steel plates 10 and two short-edge steel plates 11, and the welding seam is full and firm.
And then, mounting a bottom die and binding beam reinforcing steel bars of the prestressed structural beam, wherein the beam reinforcing steel bars of the prestressed structural beam comprise common stressed reinforcing steel bars 6 arranged in a full length mode and common beam stirrups 4 bound on the common stressed reinforcing steel bars 6. The installation method of the bottom die and the common stressed steel bars 6 is the same as that of a common prestressed structural beam, when beam stirrups 4 are constructed, 3 nearest lines to two sides of a reserved hole are required to be arranged as the encrypted stirrups 12 at intervals of 5cm, 5 reinforced stirrups at the position of the reserved hole are welded with 1 steel sleeve to form a combined embedded system (as shown in figure 2), when construction is carried out, the position of the steel sleeve 9 is required to be correct, after the construction of the reinforced steel bars 8 and the steel sleeve 9 is completed, rechecking is required to be carried out on the positions, and the next construction is carried out after no errors are ensured.
Then, the unbonded prestressed reinforcement 5 is embedded in three steps. Firstly, manufacturing the unbonded prestressed reinforcement 5, stripping an extrusion section of unbonded outer skin when blanking and extruding the unbonded prestressed reinforcement 5, numbering the unbonded prestressed reinforcements 5 with different lengths after manufacturing, and sorting and stacking the unbonded prestressed reinforcements. Secondly, the unbounded fixed end is embedded and the stretching end is embedded. Finally, the installation of the unbonded prestressed reinforcement needs to be positioned accurately and straightly, and the protection of the outer skin needs to be paid attention.
And after the unbonded prestressed reinforcement is embedded, erecting a beam side template, pouring concrete, and protecting the position of the combined embedded system in the pouring process. And after the concrete grade reaches 75% of the design strength, removing the beam side mold, tensioning the unbonded prestressed reinforcement, adopting a 25t front clamping type jack, driving a high-pressure oil pump, controlling the deviation of the elongation value within +/-6% in the tensioning process of the unbonded prestressed reinforcement, cutting the reinforcement after tensioning, brushing anti-rust paint, sealing an anchor, and removing the beam bottom mold.
According to the invention, the combined embedded system is arranged in the prestressed structural beam, so that rows of large-section reserved holes are formed in the prestressed structural beam, and the prestressed structural beam has the characteristics of high safety, low manufacturing cost, quick construction and the like. The method comprises the following steps: the combined pre-buried system comprises reinforcement stirrups and a steel sleeve, the large-section reserved hole is rectangular in shape and arranged in rows, and the combined pre-buried system is the same in size, height and distance. The combined embedded system is tightly connected with the steel bar system in the prestressed structural beam, so that the prestressed structural beam with the large-section row reserved holes is safe and quick in construction.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a entrance to a cave building structure is reserved in large cross-section in bank on prestressed structure roof beam which characterized in that: the combined pre-buried system comprises a pre-stressed structural beam and is characterized in that rows of pre-stressed structural beams are equidistantly combined in the length direction of the pre-stressed structural beam, the combined pre-buried system comprises a steel sleeve formed with a large-section reserved hole and reinforcing stirrups welded to the outer portion of the steel sleeve, the reinforcing stirrups are welded to beam reinforcements of the pre-stressed structural beam, unbonded prestressed reinforcements are buried in the length direction of the pre-stressed structural beam, and the unbonded prestressed reinforcements are symmetrically distributed on the upper side and the lower side of the steel sleeve.
2. The pre-stressed structural beam pre-arranged row opening building structure with large cross sections as claimed in claim 1, wherein the number of the large cross section pre-arranged openings on each pre-stressed structural beam is 5, the cross section of the large cross section pre-arranged opening is 500mm × 350mm rectangle, and the depth is equal to the width of the pre-stressed structural beam.
3. The pre-stressed structural beam large-section row reserved hole building structure as claimed in claim 1, wherein: the beam reinforcing steel bar of the prestressed structural beam comprises a stress reinforcing steel bar arranged in the full length and a beam stirrup bound on the stress reinforcing steel bar.
4. The pre-stressed structural beam large-section row reserved hole building structure as claimed in claim 3, wherein: the diameter and the number of the limbs of the reinforcement stirrup are the same as those of the beam stirrup.
5. The pre-stressed structural beam large-section row reserved hole building structure as claimed in claim 3, wherein: the spacing of the reinforcement stirrups is smaller than the spacing of the beam stirrups.
6. The pre-stressed structural beam large-section row reserved hole building structure as claimed in claim 3, wherein: the two sides of the large-section reserved hole are welded with a plurality of encrypted stirrups, and the distance between the encrypted stirrups is smaller than that between the reinforced stirrups.
7. A construction method for a large-section row reserved hole building on a prestressed structural beam is characterized by comprising the following steps:
manufacturing a steel sleeve with a reserved hole with a large cross section, and welding a reinforcing stirrup outside the steel sleeve to form a combined embedded system;
mounting a bottom die of the prestressed structural beam and binding beam reinforcing steel bars, arranging a plurality of combined embedded systems in rows at equal intervals along the length direction of the prestressed structural beam, and welding and fixing the combined embedded systems with the beam reinforcing steel bars;
embedding unbonded prestressed reinforcements in the prestressed structural beam in the length direction, wherein the unbonded prestressed reinforcements are symmetrically distributed on the upper side and the lower side of the steel sleeve;
erecting a beam side mold of the prestressed structural beam to finish the concrete pouring of the prestressed structural beam;
and (4) dismantling the beam side die, and performing tensioning construction of the unbonded prestressed reinforcement.
8. The construction method of the large-section row reserved hole building on the prestressed structural beam as claimed in claim 7, characterized in that: when the reinforcing steel bars of the prestressed structural beam are bound, a plurality of encrypted stirrups are arranged on the left side and the right side of each large-section reserved hole, and the distance between the encrypted stirrups is smaller than that between the reinforced stirrups.
9. The construction method of the large-section row reserved hole building on the prestressed structural beam as claimed in claim 7, characterized in that: the bottom and the top of steel sleeve are provided with the multichannel the reinforcement stirrup, the reinforcement stirrup is the U type or the type of falling the U, and the both ends of opening side weld respectively the bottom or the top of steel sleeve.
10. The construction method of the large-section row reserved hole building on the prestressed structural beam as claimed in claim 7, characterized in that: and in the process of tensioning the unbonded prestressed reinforcement, controlling the deviation of the elongation value of the unbonded prestressed reinforcement within +/-6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265701.3A CN111502117A (en) | 2020-04-07 | 2020-04-07 | Large-section row reserved hole building structure on prestressed structural beam and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010265701.3A CN111502117A (en) | 2020-04-07 | 2020-04-07 | Large-section row reserved hole building structure on prestressed structural beam and construction method |
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| CN111502117A true CN111502117A (en) | 2020-08-07 |
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| CN202010265701.3A Pending CN111502117A (en) | 2020-04-07 | 2020-04-07 | Large-section row reserved hole building structure on prestressed structural beam and construction method |
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| JP2007051533A (en) * | 2005-07-21 | 2007-03-01 | Ohbayashi Corp | Reinforcing structure of reinforced concrete beam having opening, reinforcing method and beam structure |
| CN201087480Y (en) * | 2007-08-16 | 2008-07-16 | 同济大学 | Prestressed concrete composite beam |
| CN201512886U (en) * | 2009-09-11 | 2010-06-23 | 大连悦泰建设工程有限公司 | Cast-in-place concrete girderless hollow floorslab |
| CN102852279A (en) * | 2012-08-16 | 2013-01-02 | 杨众 | Prestressed reinforced concrete superposed beam having convex-concave superposed surfaces |
| CN103590535A (en) * | 2013-11-14 | 2014-02-19 | 苏州工业园区设计研究院股份有限公司 | Opening structure of reinforced concrete beam |
| CN108360821A (en) * | 2018-02-07 | 2018-08-03 | 上海建工二建集团有限公司 | A kind of construction method of beam |
| CN108487461A (en) * | 2018-03-20 | 2018-09-04 | 东南大学 | Precast prestressed concrete frame bean column node with additional bar and sleeve |
-
2020
- 2020-04-07 CN CN202010265701.3A patent/CN111502117A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007051533A (en) * | 2005-07-21 | 2007-03-01 | Ohbayashi Corp | Reinforcing structure of reinforced concrete beam having opening, reinforcing method and beam structure |
| CN201087480Y (en) * | 2007-08-16 | 2008-07-16 | 同济大学 | Prestressed concrete composite beam |
| CN201512886U (en) * | 2009-09-11 | 2010-06-23 | 大连悦泰建设工程有限公司 | Cast-in-place concrete girderless hollow floorslab |
| CN102852279A (en) * | 2012-08-16 | 2013-01-02 | 杨众 | Prestressed reinforced concrete superposed beam having convex-concave superposed surfaces |
| CN103590535A (en) * | 2013-11-14 | 2014-02-19 | 苏州工业园区设计研究院股份有限公司 | Opening structure of reinforced concrete beam |
| CN108360821A (en) * | 2018-02-07 | 2018-08-03 | 上海建工二建集团有限公司 | A kind of construction method of beam |
| CN108487461A (en) * | 2018-03-20 | 2018-09-04 | 东南大学 | Precast prestressed concrete frame bean column node with additional bar and sleeve |
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Application publication date: 20200807 |