CN104594556A - Prefabricated type steel reinforced concrete beam with transverse steel partition boards and construction method - Google Patents
Prefabricated type steel reinforced concrete beam with transverse steel partition boards and construction method Download PDFInfo
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Abstract
The invention relates to a prefabricated type steel reinforced concrete beam with transverse steel partition boards. By adopting the idea of partial prefabrication and partial cast-in-situ, the prefabricated type steel reinforced concrete beam is composed of a prefabrication part and a cast-in-situ part, and specifically includes: a precast U-shaped high-strength concrete groove; cast-in-situ common concrete 1 filling the precast U-shaped high-strength concrete groove; section steel that is disposed in the precast U-shaped high-strength concrete groove and parallel to the groove length direction; transverse steel partition boards that are disposed in the precast U-shaped high-strength concrete groove and are perpendicular to the groove length direction; several closed stirrups that are disposed in the precast U-shaped high-strength concrete groove and are perpendicular to the groove length direction; several longitudinal bars 1 that are disposed at the bottom of the precast U-shaped high-strength concrete groove and are parallel to the groove length direction; and a cast-in-situ frange plate disposed at the top of the precast U-shaped high-strength concrete groove. The invention also provides a construction method of the beam. The construction method provided by the invention can improve the longitudinal anti-shearing effect between precast concrete and cast-in-place concrete, at the same time prevents lateral damage, and improves the crack resistance, durability and fire resistance of the beam.
Description
Technical field
The invention belongs to technical field of buildings, particularly a kind of prefabrication and assembly construction girder with rolled steel section en cased in concrete with horizontal steel diaphragm and construction method.
Background technology
In modern reinforced concrete structure, most widely used form of structure is the earliest used to be monolithic reinforced concrete structure, it is formwork the structure of monobloc cast at the scene, there is the advantages such as overall performance is good, rigidity is large, barrier properties is good, adaptive capacity built flexibly to out-of-shape and space also very strong simultaneously.But in use also have a lot of shortcomings, as carried out formwork and construction at the scene, working procedure is various, labo r usage is large, and material usage is many, and the cycle is long, high in cost of production, does not play positive impetus for establishing resource economy type and friendly environment society.
Therefore along with the development of building construction technology, be there is development in prefabricated concrete structure.It is the concrete structure being coagulated native component or parts assembly connection by concrete.The making of building unit can be made not by impact and the restriction in season relative to cast-in-place concrete structure fabricated construction, realize suitability for industrialized production, because component carries out building and maintenance in factory, the quality of component is ensured, and substantially reduce the construction period, accelerating construction progress, has saved a large amount of shuttering supportings, but it also also exists many shortcomings simultaneously, overall performance is poor, impervious poor, unfavorable antidetonation, also has certain deficiency in use and aesthetic.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of prefabrication and assembly construction girder with rolled steel section en cased in concrete with horizontal steel diaphragm and construction method, remain cast-in-place and advantage that is prefabricated concrete structure, solve the deficiency of two kinds of structures simultaneously, there is the feature of easy construction, with low cost, function admirable.
To achieve these goals, the technical solution used in the present invention is:
With a prefabrication and assembly construction girder with rolled steel section en cased in concrete for horizontal steel diaphragm, comprising:
Prefabricated U-shaped high-strength concrete groove 1;
Be filled in the cast-in-place ordinary concrete 1 in prefabricated U-shaped high-strength concrete groove 1;
To be arranged in prefabricated U-shaped high-strength concrete groove 1 and the length direction shaped steel 9 parallel with flute length direction;
Be arranged at some horizontal steel diaphragm 7 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction;
Be arranged at some closed stirrup 5 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction;
Be arranged at prefabricated U-shaped high-strength concrete groove 1 bottom land and the some vertical muscle one 6 parallel with flute length direction;
And,
Be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove 1 top.
The bottom of described stirrup 5 is arranged in cell wall and the bottom land of prefabricated U-shaped high-strength concrete groove 1, vertical muscle 1 is welded on the bottom of stirrup 5, the vertical muscle 28 that the welded top of stirrup 5 is parallel with vertical muscle 1, the bottom of described shaped steel 9 is arranged in the bottom land of prefabricated U-shaped high-strength concrete groove 1, top is positioned at below the top of stirrup 5, and described prefabricated U-shaped high-strength concrete groove 1, stirrup 5, vertical muscle 1, horizontal steel diaphragm 7, vertical muscle 28 and shaped steel 9 are pre-erection.
Described cast-in-place ordinary concrete 1 and cast-in-place frange plate are cast-in-place part.
In the longitudinal direction, prefabricated U-shaped high-strength concrete groove 1 is stretched out at two ends to described shaped steel 9.
Described shaped steel 9 is H profile steel, i iron or cellular steel.
Described cast-in-place ordinary concrete 1 is different from the concrete strength that prefabricated U-shaped high-strength concrete groove 1 adopts with the concrete strength that cast-in-place frange plate adopts.
The concrete strength that the concrete strength that described cast-in-place ordinary concrete 1 and cast-in-place frange plate adopt adopts lower than prefabricated U-shaped high-strength concrete groove 1.
The concrete that described cast-in-place ordinary concrete 1 and cast-in-place frange plate adopt is regeneration concrete, light weight aggregate concrete, rubber concrete, sound absorption concrete or thermal-insulating concrete.
Described cast-in-place frange plate adopts composite slab with profiled steel sheeting or laminated floor slab.
Described composite slab with profiled steel sheeting is made up of profiled sheet or precast concrete plank 3 and cast-in-place ordinary concrete 24, and wherein profiled sheet or precast concrete plank 3 are connected with the top of prefabricated U-shaped high-strength concrete groove 1.
The construction method of the prefabrication and assembly construction girder with rolled steel section en cased in concrete of the horizontal steel diaphragm of this band, step is as follows:
1, in factory, vertical muscle 1 is welded on the bottom of stirrup 5, vertical muscle 28 is welded on the top of stirrup 5, is built in prefabricated U-shaped high-strength concrete groove 1 in the bottom of the bottom of stirrup 5, shaped steel 9 and horizontal steel diaphragm 7, completes pre-erection;
2, at the scene, the two ends of shaped steel 9 are directly connected with coupled column or steel column, or are connected with concrete column transition;
3, in prefabricated U-shaped high-strength concrete groove 1, cast-in-place ordinary concrete 1 is built;
4, above prefabricated U-shaped high-strength concrete groove 1, cast-in-place frange plate is built.
Compared with prior art, the invention has the beneficial effects as follows:
(1) easy construction.
The precasting steel frame part of PSRC beam comprises beam bottom and indulges stirrup in muscle, beam, shaped steel and bottom concrete, the production that is all prefabricated in the factory of this part completes, in building site by being directly connected with coupled column or steel column by the shaped steel of pre-erection (or being connected with concrete column transition), more namely concreting floor completes the construction and installation of PSRC beam.Compared with the construction and installation of traditional SRC beam, on-the-spot without temporary support under assembling reinforcement, formwork, form removal and erection beam.If floor adopts composite slab with profiled steel sheeting or laminated floor slab, then in whole floor construction process all without the need to formwork, form removal and temporary support, on-site construction processes, construction material and construction all greatly reduce man-hour.Through appropriate design, the construction and installation of PSRC beam will be same with girder steel or steel-concrete composite beam convenient and quick, and workability will greatly improve.
(2) flexible design.
In PSRC beam, under positive bending moment effect, in girder span, pre-erection is in tensile region, for improving the construction stage rigidity of PSRC beam, cracking resistance, shear capacity, durability and fire resistance, its pre-erection adopts the U-shaped high-strength concrete of band steel diaphragm formula, and the cast-in-place part being in pressure zone is owing to having shaped steel top flange and the effect of concrete frange plate, without the need to adopting high-strength concrete, adopt regular tenacity concrete.Under hogging moment effect, beam-ends is in the pre-erection for adopting high-strength concrete of pressure zone, and because concrete strength is higher, cross section depth of compression zone is less, simultaneously in conjunction with stirrup encryption restraint and high-strength concrete, cross section plastic rotation can better be ensured or be improved a lot.Therefore, in PSRC beam, pre-erection and cast-in-place part can adopt the concrete of different intensity grades, cause design more flexible.Therefore, the present invention has good engineer applied and is worth and popularizing application prospect, has good Social benefit and economic benefit.
3) functional promotion.
As mentioned above, can adopt high-strength concrete at pre-erection in PSRC beam, cast-in-place part adopts regular tenacity concrete, and the two strength grade of concrete can be different.Therefore, in practical engineering application, can not limit by concrete strength in beam when floorslab concrete is selected, select all kinds concrete of different qualities, effective lift structure using function demand.Such as cast-in-place part concrete and the floorslab concrete of PSRC beam, be the energy that economizes on resources, can regeneration concrete be adopted; For alleviating superstructure deadweight, light weight aggregate concrete can be adopted; For improving superstructure shock-absorption sound-insulation effect, rubber concrete or sound absorption concrete can be adopted; For improving superstructure heat-insulating property, thermal-insulating concrete can be adopted.
4) cost is reduced.
In traditional SRC beam construction, ordinary circumstance underbeam concrete is built together with floorslab concrete, and namely beam concrete and floorslab concrete are necessary for same kind and strength grade concrete.Girder with rolled steel section en cased in concrete many employings high-strength concrete that span is larger, causes floor to need too to adopt high-strength concrete, thus causes construction cost to increase; Simultaneously owing to adopting high-strength concrete, also can significantly improve the minimum steel ratio limit value of floor, thus floor bar consumption is increased, cause construction cost to strengthen further.And in PSRC beam, only can adopt high-strength concrete in beam prefabricated part, and the cast-in-place part of beam and floorslab concrete all can adopt ordinary concrete, regeneration concrete or light weight aggregate concrete, strength grade of concrete does not need too high, cause the minimum steel ratio limit value of floor bar to reduce, reduce so the amount of reinforcement of whole superstructure adopts during high-strength concrete relatively.
5) construction quality is good.
In the construction of traditional SRC beam, because SRC beam working procedure is many, difficulty of construction large, often to occur in SRC web that concrete vibrating is poor, the quality problems such as misplace of rebars in Concrete intensity insufficient and beam, construction quality is wayward.And in PSRC beam, the web part of PSRC beam is prefabrication, concreting is vibrated convenient and can be adopted stream curing, concrete construction quality is easy to control, the concrete lateral partitions adopted in U-type groove can prevent the longitudinal shear slippage between new-old concrete effectively, especially, time for employing high-strength concrete, PSRC beam advantage in quality control on construction is more obvious.
Generally speaking, adopt the PSRC beam of prefabrication and assembly construction technology compared with traditional SRC beam, simplify working procedure and difficulty of construction, effectively can solve the crucial problem that the traditional SRC beam of long-term restriction is applied, and can give full play to and effectively promote the significant advantage of traditional SRC beam in stress performance, endurance quality, fire resistance and economic performance etc., can be widely used in all kinds of steel concrete and steel building, be particularly useful for large span, heavy load or complexity, irregular highrise building and super highrise building.Therefore, further investigation is carried out to PSRC beam and have practical meaning in engineering to promote it to apply.
Accompanying drawing explanation
Fig. 1 is precast and assembled reinforced concrete beam section schematic diagram of the present invention.
Fig. 2 is the schematic perspective view of pre-erection of the present invention.
Fig. 3 is the lateral view of pre-erection of the present invention.
Fig. 4 is the top view of pre-erection of the present invention.
Fig. 5 is A-A direction view in Fig. 4, i.e. prefabricated U-shaped high-strength concrete slot cross-section figure.
Fig. 6 is B-B direction view in Fig. 4, i.e. the sectional view of horizontal steel diaphragm in prefabricated U-shaped high-strength concrete groove.
Fig. 7 is the schematic perspective view of the cast-in-place part of the present invention.
Fig. 8 is the top view of pre-erection of the present invention.
Fig. 9 is C-C direction view in Fig. 4, i.e. prefabricated U-shaped high-strength concrete slot cross-section figure.
Figure 10 is D-D direction view in Fig. 4, i.e. the sectional view of horizontal steel diaphragm in prefabricated U-shaped high-strength concrete groove.
Detailed description of the invention
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
A kind of prefabrication and assembly construction girder with rolled steel section en cased in concrete with horizontal steel diaphragm of the present invention, adopts the thought that partial precast assembled portion is cast-in-place, is made up of, as shown in Figures 1 to 10, comprises: prefabricated U-shaped high-strength concrete groove 1 pre-erection and cast-in-place part; Be filled in the cast-in-place ordinary concrete 1 in prefabricated U-shaped high-strength concrete groove 1; To be arranged in prefabricated U-shaped high-strength concrete groove 1 and the length direction shaped steel 9 parallel with flute length direction; Be arranged at some horizontal steel diaphragm 7 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction, horizontal steel diaphragm 7 can be welded on shaped steel 9; Be arranged at some closed stirrup 5 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction; Be arranged at prefabricated U-shaped high-strength concrete groove 1 bottom land and the some vertical muscle one 6 parallel with flute length direction; And be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove 1 top.
Wherein, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, in the cell wall that the bottom of stirrup 5 is embedded in prefabricated U-shaped high-strength concrete groove 1 and bottom land, the top of stirrup 5 is unsettled, vertical muscle 1 is welded on the bottom of stirrup 5, the vertical muscle 28 that the welded top of stirrup 5 is parallel with vertical muscle 1, the bottom of shaped steel 9 is embedded in the bottom land of prefabricated U-shaped high-strength concrete groove 1, top is positioned at below the top of stirrup 5, and prefabricated U-shaped high-strength concrete groove 1, stirrup 5, vertical muscle 1, horizontal steel diaphragm 7, vertical muscle 28 and shaped steel 9 are pre-erection.
As shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10, cast-in-place ordinary concrete 1 and cast-in-place frange plate form cast-in-place part.Cast-in-place frange plate can adopt composite slab with profiled steel sheeting or laminated floor slab.With composite slab with profiled steel sheeting in the present embodiment, be made up of profiled sheet or precast concrete plank 3 and cast-in-place ordinary concrete 24, wherein profiled sheet or precast concrete plank 3 are connected with the top of prefabricated U-shaped high-strength concrete groove 1.After cast-in-place, the top of shaped steel 9, the top of stirrup 5 and vertical muscle 28 are all arranged in cast-in-place part.
Wherein:
1) concrete involved by pre-erection adopts high-strength concrete, can improve the cracking resistance of precast and assembled reinforced concrete beam, endurance quality and fire resistance.
2) setting of horizontal steel diaphragm, can improve the longitudinal cementation between prefabricated and cast-in-situ concrete.
3) shaped steel 9 in the longitudinal direction, prefabricated U-shaped high-strength concrete groove 1 is stretched out at two ends, that is, at the overhanging segment shaped steel of precasting steel frame part, when construction and installation, shaped steel bolt overhanging with pre-buried column is connected, thus is convenient to prefabricated high-strength concrete cage of reinforcement.
4) the horizontal each design parameters such as intensity, thickness, width, spacing involved by steel diaphragm of the present invention can be optimized design according to corresponding design and calculation method.
5) shaped steel 9 can adopt H profile steel or i iron, and for there being pre-buried horizontal pipeline in instructions for use beam, H profile steel or i iron can be changed into cellular steel, and adjustment cellular steel cavity size is with satisfied actual user demand.
Concrete construction method is:
First be prefabricated in the factory the web part, bottom of PSRC beam, then install the web part, bottom of PSRC beam at building-site, finally whole top frange plate part of watering PSRC beam together with concrete floor.Whole shaped steel top flanges in the beam prefabricated part of PSRC, part shaped steel web and stirrup expose.The prefabricated web part, bottom of PSRC beam is the high-strength concrete cage of reinforcement of the horizontal steel diaphragm of band and U-shaped high-strength concrete groove (i.e. web); The cast-in-place frange plate part in top of beam can be the forms such as armored concrete slab, composite slab with profiled steel sheeting and precast concrete superimposed sheet, and wherein cast-in-situ concrete can be the dissimilar concrete such as ordinary concrete, regeneration concrete, light weight aggregate concrete.By the mutual combination of multi-form prefabricated web part and multi-form cast-in-place frange plate, optimum organization all kinds PSRC beam can be become, and each tool performance characteristics and advantage, be suitable for different project situation demand.
The present invention is on conventional u-shaped precast beam basis, pre-erection adopts shaped steel, horizontal steel diaphragm is built together with high-strength concrete, the anti-slipping property at effective raising pre-erection globality and new-old concrete interface, significantly reduce pre-erection deadweight, meeting on-site hoisting requirement, is a kind of good method for prefabricating.According to the present invention, method for designing is proposed, can the optimised coagulation soil material of dividing plate, thickness and spacing further, shaped steel kind (Ripple Sternum, cellular steel etc.), precast concrete inner surface lines, the parameters such as pre-erection concrete strength, cast-in-situ concrete intensity and kind (regeneration concrete, light weight aggregate concrete etc.) are to realize the design of this example optimal.
Claims (10)
1. the prefabrication and assembly construction girder with rolled steel section en cased in concrete with horizontal steel diaphragm, is characterized in that, comprising:
Prefabricated U-shaped high-strength concrete groove (1);
Be filled in the cast-in-place ordinary concrete one (2) in prefabricated U-shaped high-strength concrete groove (1);
To be arranged in prefabricated U-shaped high-strength concrete groove (1) and the length direction shaped steel (9) parallel with flute length direction;
Be arranged at some horizontal steel diaphragm (7) in prefabricated U-shaped high-strength concrete groove (1) and vertical with flute length direction;
Be arranged at some closed stirrup (5) in prefabricated U-shaped high-strength concrete groove (1) and vertical with flute length direction;
Be arranged at prefabricated U-shaped high-strength concrete groove (1) bottom land and the some vertical muscle one (6) parallel with flute length direction;
And,
Be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove (1) top.
2. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, the bottom of described stirrup (5) is arranged in cell wall and the bottom land of prefabricated U-shaped high-strength concrete groove (1), vertical muscle one (6) is welded on the bottom of stirrup (5), the vertical muscle two (8) that the welded top of stirrup (5) is parallel with vertical muscle one (6), the bottom of described shaped steel (9) is arranged in the bottom land of prefabricated U-shaped high-strength concrete groove (1), top is positioned at below the top of stirrup (5), described prefabricated U-shaped high-strength concrete groove (1), stirrup (5), vertical muscle one (6), horizontal steel diaphragm (7), vertical muscle two (8) and shaped steel (9) are pre-erection.
3. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, is characterized in that, described cast-in-place ordinary concrete one (2) and cast-in-place frange plate are cast-in-place part.
4. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, described shaped steel (9) in the longitudinal direction, prefabricated U-shaped high-strength concrete groove (1) is stretched out at two ends, and described shaped steel (9) is H profile steel, i iron or cellular steel.
5. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, described cast-in-place ordinary concrete one (2) is different from the concrete strength that prefabricated U-shaped high-strength concrete groove (1) adopts with the concrete strength that cast-in-place frange plate adopts.
6. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, the concrete strength that the concrete strength that described cast-in-place ordinary concrete one (2) and cast-in-place frange plate adopt adopts lower than prefabricated U-shaped high-strength concrete groove (1).
7. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, the concrete that described cast-in-place ordinary concrete one (2) and cast-in-place frange plate adopt is regeneration concrete, light weight aggregate concrete, rubber concrete, sound absorption concrete or thermal-insulating concrete.
8. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, is characterized in that, described cast-in-place frange plate adopts composite slab with profiled steel sheeting or laminated floor slab.
9. the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 8 with horizontal steel diaphragm, it is characterized in that, described composite slab with profiled steel sheeting is made up of profiled sheet or precast concrete plank (3) and cast-in-place ordinary concrete two (4), and wherein profiled sheet or precast concrete plank (3) are connected with the top of prefabricated U-shaped high-strength concrete groove (1).
10. the construction method of the prefabrication and assembly construction girder with rolled steel section en cased in concrete according to claim 1 with horizontal steel diaphragm, it is characterized in that, step is as follows:
1), in factory, the bottom that muscle one (6) is welded on stirrup (5) will be indulged, vertical muscle two (8) is welded on the top of stirrup (5), the bottom of the bottom of stirrup (5), shaped steel (9) and horizontal steel diaphragm (7) are built in prefabricated U-shaped high-strength concrete groove (1), completes pre-erection;
2), at the scene, the two ends of shaped steel (9) are directly connected with coupled column or steel column, or are connected with concrete column transition;
3), in prefabricated U-shaped high-strength concrete groove (1), cast-in-place ordinary concrete one (2) is built;
4), cast-in-place frange plate is built to prefabricated U-shaped high-strength concrete groove (1) top.
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| CN201410749386.6A CN104594556A (en) | 2014-12-05 | 2014-12-05 | Prefabricated type steel reinforced concrete beam with transverse steel partition boards and construction method |
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| CN105821750A (en) * | 2016-03-24 | 2016-08-03 | 中国十七冶集团有限公司 | Prefabricated prestress double-T board and use method thereof |
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| CN108756061A (en) * | 2018-06-19 | 2018-11-06 | 西安建筑科技大学 | A kind of partial precast assembly prestress steel reinforced concrete hybrid beam and construction method |
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| CN110042984A (en) * | 2019-04-19 | 2019-07-23 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam of splitting type holes in soffit |
| CN110258920A (en) * | 2019-04-19 | 2019-09-20 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam of holes in soffit |
| CN110306724A (en) * | 2019-04-19 | 2019-10-08 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam for the welded type holes in soffit that misplaces |
| CN111155713A (en) * | 2020-02-17 | 2020-05-15 | 西安建筑科技大学 | Prefabricated superposed beam and construction method |
| CN111962767A (en) * | 2020-08-17 | 2020-11-20 | 东华理工大学 | Web plate open-hole section steel partially-wrapped concrete composite beam and construction method thereof |
| CN114016740A (en) * | 2021-12-14 | 2022-02-08 | 北京国际建设集团有限公司 | Construction method for seismic mitigation and isolation conversion layer of subway upper cover structure |
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| CN105821750A (en) * | 2016-03-24 | 2016-08-03 | 中国十七冶集团有限公司 | Prefabricated prestress double-T board and use method thereof |
| CN108166681A (en) * | 2018-03-02 | 2018-06-15 | 东华理工大学 | A kind of assembled partial precast part external wrapping concrete combination beam and its construction method |
| CN108755963A (en) * | 2018-06-12 | 2018-11-06 | 西安建筑科技大学 | A kind of partial precast assembled steel reinforced concrete giant frame structure and construction method |
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| CN110042984A (en) * | 2019-04-19 | 2019-07-23 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam of splitting type holes in soffit |
| CN110258920A (en) * | 2019-04-19 | 2019-09-20 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam of holes in soffit |
| CN110306724A (en) * | 2019-04-19 | 2019-10-08 | 北京工业大学 | A kind of prefabricated package Honeycomb Beam for the welded type holes in soffit that misplaces |
| CN111155713A (en) * | 2020-02-17 | 2020-05-15 | 西安建筑科技大学 | Prefabricated superposed beam and construction method |
| CN111962767A (en) * | 2020-08-17 | 2020-11-20 | 东华理工大学 | Web plate open-hole section steel partially-wrapped concrete composite beam and construction method thereof |
| CN114016740A (en) * | 2021-12-14 | 2022-02-08 | 北京国际建设集团有限公司 | Construction method for seismic mitigation and isolation conversion layer of subway upper cover structure |
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