阅读说明：本技术 一种预应力空心叠合板的连接结构及其施工方法 (Connecting structure of prestressed hollow composite slabs and construction method thereof ) 是由 应森源 封佳伟 徐科杰 李芬芬 裘卫明 于 2019-10-28 设计创作，主要内容包括：一种预应力空心叠合板的连接结构及其施工方法,属于预应力空心叠合板技术领域；倒扣U型钢筋组实现相邻两块预应力空心板之间的连接强度更高,叠合层钢筋网与倒扣U型钢筋组之间捆扎固定,提高了混凝土的强度；梯形凹口与斜口使相邻两块预应力空心板之间形成一个开放式腔体,实现相邻两块预应力空心板之间浇筑的混凝土更好地与两块预应力空心板结合的效果,梯形凹口与斜口均带有倾斜面,这使两块预应力空心板与浇筑的混凝土之间更具有承载力；本发明通过设置有倒扣U型钢筋组、辅助钢筋和叠合层钢筋使两个或多个预应力空心板之间的连接更加固定,达到整体性好、刚度大、抗裂性好等效果,且在不增加钢筋消耗的同时实现了大跨度。(connecting structure of prestressed hollow composite slabs and construction method thereof, belonging to the prestressed hollow composite slab technical field, the inverted U-shaped steel bar group realizes higher connecting strength between two adjacent prestressed hollow slabs, the binding and fixing between the superimposed steel bar net and the inverted U-shaped steel bar group improves the strength of concrete, the trapezoidal notch and the bevel connection enable open cavities to be formed between the two adjacent prestressed hollow slabs, the effect of better combining the concrete poured between the two adjacent prestressed hollow slabs and the two prestressed hollow slabs is realized, the trapezoidal notch and the bevel connection are both provided with inclined planes, the bearing capacity between the two prestressed hollow slabs and the poured concrete is higher, the connection between two or more prestressed hollow slabs is more fixed by the inverted U-shaped steel bar group, the auxiliary steel bars and the superimposed steel bars, the effects of good integrity, large rigidity, good crack resistance and large span are realized without increasing the consumption of the steel bars.)

The hollow superimposed sheet's of kinds of prestressing force connection structure, including a plurality of hollow slab (1), a plurality of back-off U type rebar sets (2) and superimposed layer reinforcing bar net (4), its characterized in that the hollow slab of prestressing force (1) is the concrete slab of cuboid forms, the inside center of the hollow slab of prestressing force (1) is equipped with a plurality of hollow holes (5), hollow hole (5) run through both ends around hollow slab (1) of prestressing force, the middle part of the hollow slab of prestressing force (1) both sides all is equipped with trapezoidal notch (6), the bottom of the hollow slab of prestressing force (1) both sides all is equipped with oblique mouth (7), both ends all seted up section notch (8) around hollow hole (5) are located in the left and right sides of the hollow slab of prestressing force (1), the downside and hollow hole (5) of notch (8) link up, the inboard below of corner (8) is equipped with blockking-up piece (9) in hollow hole (5), blockking-up piece (9) with the hollow slab of prestressing force (1) and the embedded steel bar net (10) and the hollow slab of prestressing force (1) and the hollow slab of prestressing force (10) and the horizontal extension of the hollow slab of reinforcing bar net (1) and the hollow slab of prestressing force (10) and the same length of pouring and the hollow slab of reinforcing bar (1) are located and are arranged as a plurality of the hollow slab of the hollow bar (10) and are equipped with the hollow bar net the hollow bar and are arranged in the hollow bar groove (10) and are equipped with the hollow slab of the hollow bar groove opening (10) and are arranged in hollow bar groove (10) and are arranged as a plurality of the hollow bar groove to the hollow bar groove (1) of the hollow bar groove (1), the hollow bar groove (10) of the hollow slab of the hollow bar groove (10) of the hollow bar (1) and the hollow slab of the hollow bar groove (10) and are arranged.

2, A construction method of the prestressed hollow composite slab as claimed in claim 1, characterized in that the construction method comprises:

s1, arranging a plurality of prestressed hollow slabs (1) to enable the two ends of each prestressed hollow slab to be aligned, and reserving slab joints (12) between every two adjacent prestressed hollow slabs (1);

s2, plugging two ends of the middle part of the hollow hole (5) by using a plugging block (9) to seal the hollow hole, so as to prevent poured concrete from entering;

s3, according to the building construction standard, stirring and forming cement, sand, stone and water to prepare concrete (13), and stirring for later use;

s4, placing the inverted U-shaped steel bar group (2) into a notch (8) between two adjacent prestressed hollow slabs (1), and pre-fixing the position of the inverted U-shaped steel bar group (2) through a small amount of concrete;

s5, hanging the overlapped laminated steel bar mesh (4) on the stress-affected hollow slab (1), and bundling and fixing the overlapped laminated steel bar mesh (4) and the plurality of reversed U-shaped steel bar groups (2) through steel wires;

s6, covering and sealing the bottom surfaces of the slab joints (12), the two ends of the hollow holes (5) and the peripheries of the prestressed hollow slabs (1) by using a template to prevent the concrete (13) from overflowing during injection;

s7, pouring the stirred concrete (13) into the slab joint (12) and the notch (8), filling the hollow hole (5) on the lower side of the notch (8) with the concrete (13) poured in the notch (8), keeping the concrete (13) poured in the notch (8) level with the upper side of the prestressed hollow slab (1), and keeping the surface of the concrete poured in the slab joint (12) lower than the surface of the prestressed hollow slab (1) by three centimeters;

s8, pouring concrete (13) on the upper sides of the plurality of prestressed hollow slabs (1), wherein the pouring amount of the concrete (13) is higher than that of the laminated layer reinforcing mesh (4), three centimeters of space reserved above slab joints (12) is filled with the concrete (13), and the concrete (13) is poured on the upper sides of the plurality of prestressed hollow slabs (1) to form a concrete laminated layer (14).

Technical Field

The invention belongs to the technical field of prestressed hollow composite slabs, and particularly relates to a connecting structure of prestressed hollow composite slabs and a construction method thereof.

Background

The composite slab is kinds of structure forms combining prefabricated and cast-in-place concrete, the prestressed hollow slab and the upper cast-in-place concrete layer are combined into integrations and are used together, the prestressed hollow slab is used as a bottom die of the cast-in-place concrete layer, so that no additional template support is needed, and the composite slab has the characteristics of good integrity, high rigidity, good crack resistance, no increase of reinforcing steel bar consumption, template saving and the like.

The steel bar truss composite slab has the advantages that the steel bar truss plays a role in shearing resistance, integrity is good, and at present, is used widely, however, too many on-site floor slab temporary supports are needed during construction of the steel bar truss composite slab, span is limited, the steel bar truss composite slab can only be used for a floor slab with a short span, and space of truss steel bars is limited, so that equipment pipelines cannot penetrate through the steel bar truss composite slab.

Therefore, kinds of prestressed hollow composite slabs are connected and their construction method are proposed to solve the above problems, the prestressed hollow slabs are used as assembled floor slabs, temporary support is reduced, large span is realized, maximum span can reach 18 m, space of laminated layers is sufficient, pipe arrangement is convenient and flexible, and the slab integrity is better by the construction and connection method of slab sides.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art and provides a connecting structure of prestressed hollow composite slabs and a construction method thereof.

The technical problem is solved by adopting the technical scheme that the connecting structure of prestressed hollow composite slabs comprises a plurality of inverted U-shaped steel bar groups and a laminated steel bar net, wherein each prestressed hollow slab is a cuboid concrete slab, a plurality of hollow holes are formed in the center of the prestressed hollow slab and penetrate through the front end and the rear end of the prestressed hollow slab, trapezoidal notches are formed in the middle of two sides of each prestressed hollow slab, oblique openings are formed in the bottoms of two sides of each prestressed hollow slab, sections of notches are formed in the front end and the rear end of each hollow hole in the left side and the right side of each prestressed hollow slab, the lower sides of the notches are communicated with the hollow holes, blocking blocks are arranged in the hollow holes below the inner sides of the notches and seal the hollow holes in the middle of the prestressed hollow slabs, each inverted U-shaped steel bar group comprises a plurality of inverted U-shaped steel bars and two auxiliary steel bars, the inverted U-shaped steel bars are arranged in the same direction, the two auxiliary steel bars are respectively arranged in the left side and the right side of the upper side of the inverted U-shaped steel bar groups, the transverse notches of the laminated steel bar groups are arranged in the hollow slab, and the longitudinal joints of the prestressed hollow slab, and the longitudinal steel bar net are formed by pouring the longitudinal joints of the two U-slab, and the longitudinal steel bar groups, and the longitudinal steel bar joints of the longitudinal steel bar groups of the laminated steel bar groups, and the longitudinal steel bar net, and the longitudinal steel bar groups are arranged in the longitudinal steel bar groups, and the longitudinal steel bar joints of the longitudinal steel bar groups are arranged in the longitudinal steel.

The construction method of the prestressed hollow composite slab comprises the following steps:

s1, arranging a plurality of prestressed hollow slabs so that two ends of each prestressed hollow slab are aligned, and reserving slab joints between every two adjacent prestressed hollow slabs;

s2, plugging two ends of the middle part of the hollow hole by using a plugging block to seal the hollow hole, so as to prevent poured concrete from entering;

s3, according to the building construction standard, stirring and forming cement, sand, stone and water to prepare concrete, and stirring for later use;

s4, placing the inverted U-shaped steel bar group into a notch between two adjacent prestressed hollow slabs, and pre-fixing the position of the inverted U-shaped steel bar group through a small amount of concrete;

s5, hanging the overlapped laminated steel bar mesh on a plurality of prestressed hollow slabs, and bundling and fixing the laminated steel bar mesh and a plurality of reversed U-shaped steel bar groups through steel wires;

s6, covering and sealing the bottom surfaces of the slab joints, the two ends of the hollow holes and the peripheries of the prestressed hollow slabs by using the templates to prevent concrete from overflowing during injection;

s7, pouring the stirred concrete into the slab joints and the notches, filling the hollow holes on the lower sides of the notches with the concrete poured in the notches, keeping the concrete poured in the notches flush with the upper side faces of the prestressed hollow slabs, and keeping the surface of the concrete poured in the slab joints lower than the surface of the prestressed hollow slabs by three centimeters;

and S8, pouring concrete on the upper sides of the plurality of prestressed hollow slabs, wherein the pouring amount of the concrete is higher than that of the laminated layer reinforcing mesh, three centimeter spaces reserved above slab joints are filled with the concrete, and the concrete is poured and leveled on the upper sides of the plurality of prestressed hollow slabs to form a concrete laminated layer.

The invention has the advantages that the reverse buckling U-shaped steel bar group is used for realizing higher connection strength between two adjacent prestressed hollow plates, the binding and fixing between the laminated layer steel bar net and the reverse buckling U-shaped steel bar group are realized, the strength of a concrete laminated layer is improved, open cavities are formed between the two adjacent prestressed hollow plates through the trapezoidal notch and the bevel, the effect that concrete poured between the two adjacent prestressed hollow plates is better combined with the two prestressed hollow plates is realized, the trapezoidal notch and the bevel are provided with the inclined planes, the bearing capacity is better realized between the two prestressed hollow plates and the poured concrete, the blocking block is used for preventing the concrete poured at the notch from entering the middle part of the hollow hole, the connection between the two or more prestressed hollow plates is more fixed through the reverse buckling U-shaped steel bar group, the auxiliary steel bars and the laminated layer steel bars, the equivalent effects of good integrity, high rigidity and good crack resistance are achieved, and the large span is realized without increasing the consumption of the steel bars.

Drawings

FIG. 1 is a schematic view of lateral structures of the present invention;

FIG. 2 is a schematic diagram of top views of the present invention;

FIG. 3 is a schematic view of configurations of the front end portion of the pre-stressed hollow core panel of the present invention;

fig. 4 is a schematic view of types of structures of the inverted U-shaped steel bar group of the present invention.

In the figure: 1. a prestressed hollow slab; 2. reversing the U-shaped steel bar group; 4. overlapping a layer of reinforcing mesh; 5. a hollow bore; 6. a trapezoidal notch; 7. a bevel opening; 8. a notch; 9. blocking; 10. an inverted U-shaped steel bar; 11. auxiliary reinforcing steel bars; 12. plate sewing; 13. concrete; 14. a concrete laminated layer.

Detailed Description

The technical solution of the present invention is further specifically described by way of example with reference to the accompanying drawings.