Prefabricated slab for building foundation pit slope

Abstract

The utility model provides a precast slab for a building foundation pit slope, which comprises a precast slab, the precast slab comprises a plurality of first transverse steel bars and a plurality of first longitudinal steel bars, the plurality of first transverse steel bars are respectively arranged on the plurality of first longitudinal steel bars, a first pouring layer is arranged between the plurality of first transverse steel bars and the plurality of first longitudinal steel bars, and a second pouring layer is arranged between the plurality of first transverse steel bars and the plurality of first longitudinal steel bars. A reserved bending groove used for being matched with the corner of the foundation pit slope in a bending mode is formed between every two adjacent first longitudinal steel bars. The structure is reasonable, dust caused by on-site construction is reduced, the construction period is short, the construction thickness is easy to control and even, safety is high, and recycling can be achieved many times.

Description

Technical Field

[0001] The utility model relates to the slope of a building foundation pit, and specifically to a precast slab for the slope of a building foundation pit. Background Technique

[0002] At present, the slopes of building foundation pits basically all use on-site shotcrete to ensure the safety of slope structures and protect the soil body from landsliding and being washed away by rain. There are currently two types of on-site shotcrete: dry shotcrete and wet shotcrete. Dry shotcrete has a greater impact on the on-site environment (with more dust), and wet shotcrete will waste some materials. These two traditional slope construction processes (excavator earth excavation, manual slope repair, steel bar binding, shotcrete spraying, curing) have an impact on the dust in the construction site environment. Moreover, the construction period is slow, and it is not easy to control the thickness of the slope during construction, and it is uneven, which affects the safety and quality of the slope to a certain extent. And there is a risk of landsliding of the foundation pit slope during construction, with low safety. Now there is an urgent need for a precast slab for the slope of a building foundation pit to solve the above problems. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a precast slab for the slope of a building foundation pit to solve the problems raised in the above background technique. The structure of the utility model is reasonable, reducing the dust caused by on-site construction, with a short construction period, easy control and uniformity of the construction thickness, and high safety.

[0004] In order to achieve the above purpose, the utility model is realized through the following technical solutions: A precast slab for the slope of a building foundation pit, including:

[0005] The precast slab, which includes a plurality of first transverse steel bars and a plurality of first longitudinal steel bars. The plurality of first transverse steel bars are respectively arranged on the plurality of first longitudinal steel bars. A first pouring layer is arranged between the plurality of first transverse steel bars and the plurality of first longitudinal steel bars. A reserved bending groove for matching and bending with the corner of the foundation pit slope is arranged between adjacent first longitudinal steel bars.

[0006] Furthermore, a pair of grooves placed on both sides of the reserved bending groove and communicating with the reserved bending groove are arranged inside the first pouring layer. The reserved bending groove and the grooves are both provided with a second pouring layer.

[0007] Furthermore, a through reserved hole is arranged between adjacent first transverse steel bars and adjacent first longitudinal steel bars. A plurality of reserved holes are arranged and are placed inside the first pouring layer. Steel nails are arranged inside the reserved holes.

[0008] Furthermore, the axis line of the reserved hole is perpendicular to the top surface of the first pouring layer.

[0009] Furthermore, at least one reserved bending groove is provided.

[0010] Further, the first casting layer is a concrete casting layer, and the second casting layer is a concrete casting layer or a cement mortar layer.

[0011] Further, a plurality of stepping protrusions extend from the top of the first casting layer.

[0012] Further, a plurality of anti-slip protrusions extend from the bottom of the first casting layer.

[0013] Further, L-shaped connecting grooves for splicing precast slabs are provided on one side of the top of the first casting layer and the other side of the bottom of the first casting layer.

[0014] Further, a plurality of second transverse steel bars respectively corresponding to and connected with a plurality of first transverse steel bars are arranged inside the first casting layer. A plurality of second longitudinal steel bars are arranged between the plurality of second transverse steel bars. The second transverse steel bar includes a first horizontal section, an inclined section and a second horizontal section connected in sequence. The inclined section is connected with the first transverse steel bar. The first horizontal section and the second horizontal section respectively correspond to the inner walls of the L-shaped connecting grooves. The plurality of second longitudinal steel bars are placed on the first horizontal sections of the plurality of second transverse steel bars.

[0015] According to a precast slab for a building foundation pit slope of the present utility model, the precast slab is cast by the first casting layer in cooperation with a plurality of first transverse steel bars and a plurality of first longitudinal steel bars, and a reserved bending groove for matching the corner of the foundation pit slope is reserved and opened on the precast slab. Under the action of the reserved bending groove, the first transverse steel bar here can be longitudinally bent, so that the precast slab is bent to have the same shape as the foundation pit slope, thereby forming an effective overall protection for the foundation pit slope surface. The precast slab can be customized according to the size and angle of the foundation pit slope, and the angle can be adjusted through the reserved bending groove. Since the precast slab is precast, it is not necessary to carry out operations such as excavator earth excavation, manual slope repair, steel bar binding, shotcrete, and curing on site, thus reducing the dust generated by on-site construction. Moreover, after the precast slab is precast, it can be directly installed on the foundation pit slope, greatly shortening the construction period, and the construction thickness is easy to control and uniform. At the same time, the risk of foundation pit slope collapse is avoided, and the safety is high. Description of the Drawings

[0016] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present utility model will become more obvious:

[0017] Figure 1 It is a structural diagram of a precast slab for a building foundation pit slope according to an embodiment of the present utility model;

[0018] Figure 2 It is a bottom view sectional view of a precast slab for a building foundation pit slope according to an embodiment of the present utility model;

[0019] Figure 3Schematic diagram of the connection between a precast slab and a foundation pit for a building foundation pit slope according to an embodiment of the present utility model;

[0020] Figure 4 Schematic diagram of a precast slab for a building foundation pit slope containing multiple reserved bending grooves according to an embodiment of the present utility model;

[0021] Figure 5 Schematic diagram of the connection structure between a precast slab for a building foundation pit slope containing multiple reserved bending grooves and a foundation pit according to an embodiment of the present utility model;

[0022] Figure 6 According to an embodiment of the present utility model Figure 2 Enlarged view of A in;

[0023] Figure 7 According to an embodiment of the present utility model Figure 3 Enlarged view of B in;

[0024] Figure 8 According to an embodiment of the present utility model Figure 5 Enlarged view of C in;

[0025] Figure 9 Schematic diagram of the structure when splicing between precast slabs for a building foundation pit slope according to an embodiment of the present utility model;

[0026] Figure 10 Front view cross-sectional view when splicing between precast slabs for a building foundation pit slope according to an embodiment of the present utility model;

[0027] Figure 11 According to an embodiment of the present utility model Figure 10 Enlarged view of D in;

[0028] In the figure: 1. Precast slab; 101. First transverse steel bar; 102. First longitudinal steel bar; 103. First pouring layer; 1031. Step-up protrusion; 1032. Anti-slip protrusion; 104. L-shaped connection groove; 105. Second transverse steel bar; 1051. First horizontal section; 1052. Inclined section; 1053. Second horizontal section; 106. Second longitudinal steel bar; 2. Reserved hole; 3. Reserved bending groove; 31. Groove; 4. Second pouring layer; 5. Steel nail; 6. Foundation pit. Detailed implementation manners

[0029] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0030] As Figure 1As shown in the figure, the utility model provides a technical solution: a precast slab for a building foundation pit slope, including:

[0031] The precast slab 1, the precast slab 1 includes a plurality of first transverse steel bars 101 and a plurality of first longitudinal steel bars 102. The plurality of first transverse steel bars 101 are respectively arranged on the plurality of first longitudinal steel bars 102. A first casting layer 103 is arranged between the plurality of first transverse steel bars 101 and the plurality of first longitudinal steel bars 102. A reserved bending groove 3 for matching and bending at the corner of the foundation pit slope is arranged between adjacent first longitudinal steel bars 102. This design forms the precast slab 1 by pouring the first casting layer 103 in cooperation with the plurality of first transverse steel bars 101 and the plurality of first longitudinal steel bars 102, and a reserved bending groove 3 for matching the corner of the foundation pit slope is reserved and opened on the precast slab 1. Under the action of the reserved bending groove 3, the first transverse steel bars 101 here can be longitudinally bent, so that the precast slab 1 is bent to have the same shape as the foundation pit slope, thereby forming an effective overall protection for the foundation pit slope surface. The precast slab 1 can be customized according to the size and angle of the foundation pit slope, and the angle can be adjusted through the reserved bending groove 3. Since the precast slab 1 is precast, it is not necessary to carry out operations such as excavator earth excavation, manual slope repair, steel bar binding, shotcrete, and curing on site, thus reducing the dust generated by on-site construction. And after the precast slab 1 is precast, it can be directly installed on the foundation pit slope, greatly shortening the construction period, and the construction thickness is easy to control and uniform. At the same time, the risk of foundation pit slope collapse is avoided, and the safety is high.

[0032] Referring to Figure 2 , Figure 3 and Figure 8 , a pair of grooves 31 placed on both sides of the reserved bending groove 3 and communicating with the reserved bending groove 3 are arranged inside the first casting layer 103. The second casting layer 4 is arranged inside both the reserved bending groove 3 and the grooves 31. This design uses the second casting layer 4. When the reserved bending groove 3 is bent to match the corner of the foundation pit slope, then the second casting layer 4 is poured, so that the first casting layer 103 and the second casting layer 4 form a whole, forming an effective overall protection for the foundation pit slope surface. By using the second casting layer 4 arranged inside both the grooves 31 and the reserved bending groove 3, the overall stability of the precast slab 1 is increased.

[0033] Referring to Figure 1 and Figure 3 , a through reserved hole 2 is arranged between adjacent first transverse steel bars 101 and adjacent first longitudinal steel bars 102. A plurality of reserved holes 2 are arranged and placed inside the first casting layer 103. Steel nails 5 are arranged inside the reserved holes 2. This design uses the reserved holes 2 and the steel nails 5 to facilitate the installation of the precast slab 1 on the foundation pit slope.

[0034] Referring to Figure 2 and Figure 3, the axis line of the reserved hole 2 is perpendicular to the top surface of the first pouring layer 103. This design facilitates the insertion of the steel nail 5 into the reserved hole 2 to install the precast slab 1 on the foundation pit slope.

[0035] Refer to Figure 3 , Figure 4 and Figure 5 , at least one reserved bending groove 3 is provided. This design enables the precast slab 1 to be bent to match the shape of the foundation pit slope by using the reserved bending groove 3 after bending to match the corner of the foundation pit slope, thereby forming an effective overall protection for the foundation pit slope. Since there is one or more corners of the foundation pit slope, the number of reserved bending grooves 3 is set as required.

[0036] Refer to Figure 3 , Figure 5 and Figure 6 , the first pouring layer 103 is a concrete pouring layer, etc., and the second pouring layer 4 is a concrete pouring layer or a cement mortar layer, etc., which improves the rationality of this design.

[0037] Refer to Figure 1 , Figure 2 and Figure 4 , the multiple first transverse steel bars 101 and the multiple first longitudinal steel bars 102 are evenly distributed, which improves the bearing capacity of the precast slab 1.

[0038] Refer to Figure 3 and Figure 7 , a plurality of stepping protrusions 1031 extend from the top of the first pouring layer 103. This design facilitates the support of workers by using the plurality of stepping protrusions 1031, so as to serve as the stepping points for workers during the installation and removal of the precast slab 1, improving the safety of workers during construction. A plurality of anti-slip protrusions 1032 extend from the bottom of the first pouring layer 103. This design increases the friction between the precast slab 1 and the soil body of the foundation pit 6 by using the plurality of anti-slip protrusions 1032, thereby improving the stability of the installation of the precast slab 1.

[0039] Refer to Figure 9 and Figure 10 , L-shaped connection grooves 104 for splicing between the precast slabs 1 are provided on both one side of the top of the first pouring layer 103 and the other side of the bottom of the first pouring layer 103. This design facilitates the splicing between the precast slabs 1 by using the L-shaped connection grooves 104, thereby facilitating the lap joint between the precast slabs 1.

[0040] Refer to Figure 10 and Figure 11, a plurality of second transverse steel bars 105 respectively corresponding to and connected to the plurality of first transverse steel bars 101 are arranged inside the first pouring layer 103. A plurality of second longitudinal steel bars 106 are arranged between the plurality of second transverse steel bars 105. The second transverse steel bar 105 includes a first horizontal section 1051, an inclined section 1052 and a second horizontal section 1053 connected in sequence. The inclined section 1052 is connected to the first transverse steel bar 101. The first horizontal section 1051 and the second horizontal section 1053 respectively correspond to the inner walls of the L-shaped connection groove 104. The plurality of second longitudinal steel bars 106 are placed on the first horizontal section 1051 of the plurality of second transverse steel bars 105. This design ensures the stability of the pouring of the first pouring layer 103 by connecting the inclined section 1052 of the second transverse steel bar 105 to the first transverse steel bar 101, and making the first horizontal section 1051 and the second horizontal section 1053 of the second transverse steel bar 105 respectively correspond to the inner walls of the L-shaped connection groove 104 (i.e., the first horizontal section 1051 is parallel to the horizontal inner wall of the L-shaped connection groove 104 and the second horizontal section 1053 is perpendicular to the vertical inner wall of the L-shaped connection groove 104), and connecting the plurality of second longitudinal steel bars 106 to the first horizontal section 1051 of the plurality of second transverse steel bars 105, without affecting the reservation of the L-shaped connection groove 104, and at the same time improving the stability of the splicing part between the precast slabs 1.

[0041] Refer to Figures 1 - 11, as an embodiment of the present utility model: When the precast slab 1 needs to be used, the precast slab 1 is cast by the first casting layer 103 in cooperation with a plurality of first transverse steel bars 101 and a plurality of first longitudinal steel bars 102, and a reserved bending groove 3 matching the corner of the foundation pit slope is reserved and opened on the precast slab 1. Under the action of the reserved bending groove 3, the first transverse steel bar 101 here can be longitudinally bent, so that the precast slab 1 is bent to be the same as the shape of the foundation pit slope, thereby forming an effective overall protection for the foundation pit slope. Then, the steel nails 5 are inserted into the reserved holes 2 to install the precast slab 1 on the slope of the foundation pit 6. Finally, the reserved bending groove 3 after bending is cast with the second casting layer 4, so that the first casting layer 103 and the second casting layer 4 form a whole, further forming an effective overall protection for the foundation pit slope, thereby completing the installation of the precast slab 1 on the foundation pit 6. Since the precast slab 1 is precast, there is no need for on-site excavator earthwork excavation, manual slope repair, steel bar binding, shotcrete, curing, etc., thus reducing the dust caused by on-site construction. Moreover, the precast slab 1 can be directly installed on the foundation pit slope after being precast, greatly shortening the construction period, and the construction thickness is easy to control and uniform. At the same time, the risk of foundation pit slope collapse is avoided, and the safety is high. Among them, the precast slab 1 can be customized according to the size and angle of the foundation pit slope, and the angle can be adjusted through the reserved bending groove 3. At the same time, after removing the steel nails 5 on the precast slab 1, the precast slab 1 can be taken out and separated from the foundation pit 6, so that the precast slab 1 can be recycled and reused multiple times. When recycling and reusing later, the second casting layer 4 can be manually broken to expose the reserved bending groove 3, and then when recycling and reusing, after adjusting the slope angle through the reserved bending groove 3, the second casting layer 4 can be re-cast, thus completing the subsequent repeated recycling and utilization of the precast slab 1, and it can be recycled and used multiple times. Casting the second casting layer 4 is to adapt to different angles of each slope, improving the practicability of the present utility model.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0043] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A prefabricated plate for building foundation pit slope, characterized in that: include: A precast plate (1), the precast plate (1) comprising a plurality of first transverse steel bars (101) and a plurality of first longitudinal steel bars (102), the plurality of first transverse steel bars (101) being arranged on the plurality of first longitudinal steel bars (102) respectively, a first casting layer (103) being arranged between the plurality of first transverse steel bars (101) and the plurality of first longitudinal steel bars (102), and a reserved bending groove (3) for matching bending with a corner of a foundation pit slope being arranged between adjacent first longitudinal steel bars (102).

2. A prefabricated plate for building foundation pit slope according to claim 1, characterized in that: A pair of grooves (31) are provided inside the first casting layer (103) and are located on both sides of the reserved bending groove (3) and are connected to the reserved bending groove (3). A second casting layer (4) is provided inside both the reserved bending groove (3) and the grooves (31).

3. The prefabricated plate for construction foundation pit slope according to claim 1, characterized in that: A through reserved hole (2) is provided between adjacent first transverse steel bars (101) and adjacent first longitudinal steel bars (102), a plurality of the reserved holes (2) are provided and are placed inside the first casting layer (103), and a steel nail (5) is provided inside the reserved hole (2).

4. A prefabricated plate for construction foundation pit slope according to claim 3, characterized in that: The axis of the reserved hole (2) is perpendicular to the top surface of the first casting layer (103).

5. The prefabricated plate for construction foundation pit slope according to claim 1, characterized in that: At least one reserved bending groove (3) is provided.

6. The prefabricated plate for construction foundation pit slope according to claim 2, characterized in that: The first casting layer (103) is a concrete casting layer, and the second casting layer (4) is a concrete casting layer or a cement mortar layer.

7. The prefabricated plate for construction foundation pit slope according to claim 1, characterized in that: A plurality of footrest protrusions (1031) extend from the top of the first casting layer (103).

8. The prefabricated plate for construction foundation pit slope according to claim 1, characterized in that: A plurality of anti-slip protrusions (1032) extend from the bottom of the first casting layer (103).

9. The prefabricated plate for construction foundation pit slope according to claim 1, characterized in that: One side of the top of the first casting layer (103) and the other side of the bottom of the first casting layer (103) are both provided with L-shaped connecting grooves (104) for splicing the prefabricated panels (1).

10. The prefabricated plate for construction foundation pit slope according to claim 9, characterized in that: A plurality of second transverse steel bars (105) respectively connected to the plurality of first transverse steel bars (101) are arranged inside the first casting layer (103); a plurality of second longitudinal steel bars (106) are arranged between the plurality of second transverse steel bars (105); the second transverse steel bars (105) comprise a first horizontal section (1051), an inclined section (1052) and a second horizontal section (1053) which are connected in sequence; the inclined section (1052) is connected to the first transverse steel bars (101); the first horizontal section (1051) and the second horizontal section (1053) respectively correspond to the inner wall of the L-shaped connecting groove (104); and the plurality of second longitudinal steel bars (106) are placed on the first horizontal section (1051) of the plurality of second transverse steel bars (105).

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