CN109469239B

CN109469239B - Grid plate with shear-resistant plate

Info

Publication number: CN109469239B
Application number: CN201710799331.XA
Authority: CN
Inventors: 尹衍樑; 徐坤荣
Original assignee: Ruentex Engineering and Construction Co Ltd
Current assignee: Ruentex Engineering and Construction Co Ltd
Priority date: 2017-09-07
Filing date: 2017-09-07
Publication date: 2021-01-26
Anticipated expiration: 2037-09-07
Also published as: CN109469239A

Abstract

The invention relates to a grid plate with an anti-shearing plate and a technology for combining the grid plates in pairs, wherein the anti-shearing plate is precast in the grid plate and partially protrudes out of the side surface of the grid plate, the grid plate is spanned on a beam by contacting the lower edge of the anti-shearing plate with the beam when the grid plate is laid, and the grid plate does not need to be directly contacted with the beam.

Description

Grid plate with shear-resistant plate

Technical Field

The invention relates to a technology of a precast grid plate attached with a shear-resistant plate, wherein the shear-resistant plate is precast in the grid plate and partially protrudes out of the side surface of the grid plate.

Background

In the construction and civil engineering technology, a precasting method is often used to reduce the construction time. In the precasting method, the beam, the column, the floor slab (or a grid plate) and the like are precast outside the site, and are transported to the site for assembly, grouting and fixing during construction, so that the site can have an optimal construction line without occupying the site space and using a large amount of construction frames, and the site construction and the operation time can be greatly saved. Since the beams, columns and floor slabs (or grid plates) are manufactured in factories other than the construction site, the production yield is high and rapid, and the precision, flatness and quality are all easy to reach the required degree, so the precasting method has become the mainstream of the current building technology.

Grid panels are widely used in civil engineering and construction technology, such as floor slabs of factory buildings, especially wafer factory buildings. The grid plate can be cast on site or precast in a precast yard. The grid plate is internally provided with reinforcing steel bars to increase the strength of the grid plate, the plate surface is provided with a plurality of hollow parts, the arrangement of the hollow parts is convenient for wiring in a factory building, and on the other hand, the weight of the grid plate can be effectively reduced.

When a floor slab of a factory building is laid, the prefabricated concrete columns can be combined with the prefabricated grid plates within a proper span range, and the aim of shortening the construction period by reducing the workload of field construction is fulfilled.

The combination of grid panels is shown in figure 1. The

grid plates

70, 80 have projecting connecting

bars

71, 81 on their sides, which are connected by lap bars 91. When the floor slab is laid, the grid plates are arranged on the I-shaped beam 60 in a spanning mode, then concrete is poured into gaps between the

grid plates

70 and 80, and after the concrete is solidified, the

grid plates

70 and 80 can be connected and fixed with each other.

Except that the gap between the

grid plates

70, 80 may be too small, so that the overlapping distance between the overlapping reinforcing bars 91 and the

coupling reinforcing bars

71, 81 is too short, thereby causing insufficient overlapping strength after the concrete is poured. Although the disadvantages of insufficient strength due to too short overlap distance can be compensated by arranging more reinforcing bars or increasing the width of the beam, both methods cause inconvenience and increase in cost for construction at a construction site and manufacturing of precast members. To overcome this problem, it is also known to provide the pre-cast floor slabs to be joined with

grooves

24, 34, respectively, as shown in fig. 2. Several connecting

reinforcements

21, 22, 23 and 31, 32, 33 are arranged at the corresponding positions of each precast floor slab and protrude inwards from the inner sides of the

grooves

24, 34 respectively. The connecting

bars

21, 22, 23 and 31, 32, 33 are overlapped by the lapping bar 50, then the gap between the grid plates which are to be combined is poured with concrete, the gap between the

grid plates

20, 30 is wider than before due to the opening of the

grooves

24, 34, after the gap is poured and solidified with concrete, the contact area between the connecting bars and the lapping bar and the concrete is larger, and the strength of the connection of the grid plates can be improved.

The grid plate with the grooves still has the problem that the groove depth is limited by the thickness of the grid plate and cannot be deepened, and when the width of the I-beam is smaller, the grid plate still has the problem of insufficient gap width, so that the bonding strength of the grid plate is insufficient, and therefore, the design of the grid plate is necessary to be further improved.

Disclosure of Invention

The invention aims to overcome the problem of insufficient bonding strength of grids when the grid plates are laid on a beam.

Generally, when a floor slab is laid, the grid plates are placed on the beams, so that the bottom surfaces of the peripheries of the grid plates are in contact with the top surfaces of the beams, and both sides of the same beam are in contact with the edges of two grid plates, so that the gap between the two grid plates is limited by the width of the beams, and when the gap between the two grid plates is insufficient, the strength of the two grid plates after combination is insufficient.

In the invention, the grid plate is precast with the shear resistant plate, and the part of the shear resistant plate protrudes out of the side surface of the grid plate. When the grid plates are laid, the anti-shearing plates are in contact with the beams, in other words, the grid plates are not in direct contact with the beams, so that if a large gap is needed between the two grid plates, proper anti-shearing plates can be designed or selected to be precast on the grid plates, the grid plates can have larger gaps without being limited by the width of the beams, and the combination strength of the two grid plates is higher than that of the conventional grid plates.

Drawings

Figure 1 shows a prior art grid panel assembly when laying the grid panel;

FIG. 2 shows a modification of the grid plate shown in FIG. 1;

FIG. 3 shows a grid plate with an attached shear plate according to the present invention;

FIG. 4 shows the grid plates of the present invention connected to each other;

FIG. 5 shows a partial enlarged view of FIG. 4; and

fig. 6 shows another case where the shear resistant plate is disposed on the grid plate.

Detailed Description

Conventional grid panels are generally rectangular in shape and are provided with connecting

bars

71, 81, 91 (shown in fig. 1) or connecting

bars

21, 22, 23 and 31, 32, 33 (shown in fig. 2) on their sides. When the lattice plates 2 are connected to each other, the

connection bars

21, 22, 23 and 31, 32, 33 are connected to each other, and then concrete is poured to firmly connect the lattice plates 20 to each other. As shown in fig. 3, the grid plate 2 of the present invention is provided with a shear resistant plate 4 on its side surface, and the shear resistant plate 4 may be pre-cast on the grid plate 2 so that a part thereof protrudes from the grid plate 2. The shear resistant plate 4 may include a plurality of shear pins 6 on its surface which function to increase the strength of the bond between the shear resistant plate 4 and the grid plate 2 when it is pre-cast on the grid plate 2. As shown in fig. 4 and 5, the position of the shear-resistant plate 4 pre-cast on the grid plate 2 can be selected near the side of the corner of the grid plate 2, so that one side of the grid plate protrudes from the shear-resistant plate 4 near the corner, and the opposite side of the grid plate also protrudes from the shear-resistant plate 4 near the corner; it is also possible to have two sides of the corner perpendicular to each other projecting beyond the shear-resistant plate 4 (see fig. 6). The lower edge of the shear resistant plate 4 protruding from the side surface of the grid plate 2 is about the same height as the bottom surface of the grid plate 2, see also fig. 3.

The grid plates 2 with the shear resistant plates 4 can be interconnected with other identical grid plates with shear resistant plates 4 to form a continuous floor. As described above, the connection bars and the shear resistant plates 4 protrude from the gaps between the lattice plates 2, and after grouting the gaps and curing, the two lattice plates 2 can be firmly connected together.

As shown in fig. 3, 4 and 5, the junction of the grid panel 2 and the grid panel 2 is above the cross beam, as is the case with prior art grid panels, see fig. 1 and 2. The difference is that the grid plate of the prior art is placed on the supporting steel beam 60 and contacts with the top surface of the supporting steel beam, and the shear resistant plate 4 protruding out of the grid plate contacts with the top surface of the supporting steel beam 10 below with the lower edge thereof, so the grid plate 2 does not need to directly contact with the steel beam 10, therefore, the gap size between the grid plates is not limited by the width of the beam, even if the width of the supporting steel beam is small, the grid plate can maintain a gap with enough width as long as the appropriate size of the shear resistant plate is selected, and the connecting steel bars between the grid plates have enough length to have enough bonding strength between the grid plates after grouting. Spacers 8 of appropriate thickness may be used where the shear plate 4 contacts the beam 10 to adjust the height of the grid plate as necessary.

The above-described embodiments are intended to enable those skilled in the art to make and use the invention clearly and clearly, and are not intended to limit the scope of the invention, which is defined in the appended claims, and all such changes and modifications that fall within the true spirit of the invention are intended to be embraced therein.

Description of the symbols

2 grid plate

4 shear resistant plate

6 shear force nail

8 shim

10 Steel girder

20 grid plate

21 connecting steel bar

22 connecting steel bar

23 connecting reinforcing bar

24 groove

30 grid plate

31 connecting reinforcing bar

32 connecting reinforcing bar

33 connecting reinforcing bar

34 groove

50 lap joint reinforcing steel bar

60I-beam

70 grid plate

71 connecting reinforcing bar

80 grid plate

81 connecting reinforcing bar

91 lap joint reinforcing bar

Claims

1. A building structure comprising:

a first grid panel comprising:

a plurality of first shear plates, each first shear plate having a first portion pre-cast within the first grid plate and having a second portion protruding from a first side of the first grid plate, wherein the second portion extends and tapers from the first portion, the second portion having a first lower edge;

a second grid panel comprising:

a plurality of second shear plates, each second shear plate having a third portion pre-cast within the second grid plate and having a fourth portion protruding from a second side of the second grid plate, wherein the fourth portion extends from the third portion and tapers, the fourth portion having a second lower edge; and

a first I-beam disposed between the first side of the first grid plate and the second side of the second grid plate to support the first lower edge of each of the plurality of first shear plates and the second lower edge of each of the plurality of second shear plates;

wherein the second portion of each of the plurality of first shear plates and the fourth portion of each of the plurality of second shear plates are stacked in a direction perpendicular to a longitudinal direction of the first i-beam, wherein the stacked dimension is smaller than a length of the first lower edge of each of the plurality of first shear plates or a length of the second lower edge of each of the plurality of second shear plates, and wherein the first lower edge of each of the plurality of first shear plates and the second lower edge of each of the plurality of second shear plates are on a same horizontal plane of bottom surfaces of the first and second grid plates.

2. The building structure according to claim 1, wherein a width of the first I-beam is less than a distance between the first side of the first grid plate and the second side of the second grid plate such that the first and second grid plates do not contact the first I-beam, wherein each of a length of the first lower edge of each of the plurality of first shear plates and a length of the second lower edge of each of the plurality of second shear plates is less than the width of the first I-beam, and wherein each of the first and second shear plates includes a plurality of shear pins thereon.

3. The building structure according to claim 2, wherein each of the first and second shear plates is pre-cast in an area near a corner of the first or second grid plate.

4. The building structure according to claim 3, wherein the first grid panel further comprises a third shear resistant panel protruding from a third side of the first grid panel, wherein the first side of the first grid panel is perpendicular to the third side of the first grid panel.

5. The building structure according to claim 4, wherein the second grid panel further comprises a fourth shear resistant panel protruding from a fourth side of the second grid panel, wherein the second side of the second grid panel is perpendicular to the fourth side of the second shear resistant panel.

6. The building structure according to claim 5, further comprising a second I-beam, wherein a lower edge of the third shear resistant panel of the first grid panel and a lower edge of the fourth shear resistant panel of the second grid panel are disposed on a top surface of the second I-beam.

7. The building structure according to claim 6, wherein the first I-beam intersects the second I-beam and a top surface of the first I-beam is flush with the top surface of the second I-beam.

8. The building structure according to claim 7, wherein a spacer is provided between the first lower edge of each of the first shear plates and the first I-beam.

9. The building structure according to claim 8, wherein a spacer is provided between the second lower edge of each of the second shear plates and the first i-beam.