CN219100118U - Basic prefabricated PC template - Google Patents

Abstract

The utility model discloses a foundation precast PC template for foundation pit modeling, which relates to the technical field of building foundation pit modeling, and comprises precast concrete slabs and precast concrete bases, wherein reinforcing steel bars are embedded in the precast concrete slabs; the precast concrete board is of a square structure, the upper side, the lower side, the left side and the right side of the precast concrete board are integrally processed with frames, the frames are protruded on the back surface of the precast concrete board and enclose a soil filling groove, the top surface of the frame at the upper part is provided with a board tenon groove, and the bottom surface of the frame at the lower part is provided with tenons; the top edge of the precast concrete base is provided with a base mortise; for one precast concrete board, the rabbet can be matched and inserted into the base rabbet to form a rabbet structure, or matched and inserted into the rabbet structure of the slab rabbet groove of other precast concrete boards. The utility model adopts prefabrication production, has convenient construction, saves labor, time and materials, ensures high-quality construction, and is not easy to crack or collapse in the process of backfilling the back of the plate with earth.

Description

Basic prefabricated PC template

Technical Field

The utility model relates to the technical field of building foundation pit modeling, in particular to a basic prefabricated PC template.

Background

At present, in the modeling of a building foundation pit, a basement raft plate, a bearing platform and the like are molded by adopting traditional brick bed-jig, namely shale brick blocks are bonded into a whole by means of masonry mortar, a certain gradient is formed, the back earthwork is supported by means of dead weight, a hard surface is formed as a waterproof layer base layer, the construction period is long, the labor input amount is large, the material cost is high, and the construction requirement of a building site is not met.

Disclosure of Invention

The present utility model aims to provide a basic prefabricated PC template which alleviates the above problems.

In order to alleviate the problems, the technical scheme adopted by the utility model is as follows:

a basic precast PC template for foundation pit modeling comprises precast concrete slabs and precast concrete bases, wherein reinforced bars are embedded in the precast concrete slabs;

the precast concrete slab is of a square structure, the upper side, the lower side, the left side and the right side of the precast concrete slab are uniformly processed with frames, the frames are protruded on the back surface of the precast concrete slab and enclose a filling slot, the top surface of the frame at the upper part is provided with a tenon slot with a through slot structure, the bottom surface of the frame at the lower part is provided with tenons, and the two ends of the slot bottom of the tenon slot are provided with triangular slots with downward sharp corners;

the top edge of the precast concrete base is provided with a base mortise;

for a certain precast concrete slab, the rabbets can be matched and inserted into the base rabbets to form a rabbet structure, or the rabbets of other precast concrete slabs can be matched and inserted into the rabbet structures, and triangular splicing reinforcing holes which are positioned at two ends of the rabbet structure and are downward in tip are formed, wherein the triangular splicing reinforcing holes are formed by the rabbet bottom surfaces and the triangular grooves above the triangular splicing reinforcing holes.

In a preferred embodiment of the present utility model, the precast concrete slab has a thickness of 5cm, so that the precast concrete slab does not cause excessive waste of mass under the condition that the requirement of stability and flatness can be achieved.

In a preferred embodiment of the utility model, the precast concrete slab comprises a steel bar frame and a steel wire mesh positioned in the steel bar frame, wherein the steel bar frame is surrounded by phi 6 steel bars arranged along the length direction of the frame, and the steel wire mesh is formed by interweaving steel wires with phi 1.2.

In a preferred embodiment of the utility model, glass filaments are incorporated into both the precast concrete panel and the precast concrete foundation.

Compared with the prior art, the utility model has the beneficial effects that:

1) The prefabricated production and construction are convenient, even if the prefabricated plate and tire membrane assembly is manufactured according to a basic drawing before excavation, the prefabricated plate can be cut by using plates with standard specifications, and the prefabricated plate is convenient to bond and easy to operate;

2) Labor and time saving and material saving: the prefabricated plate moulding bed is lighter and thinner after being matched with the steel bars, so that the material and the labor amount are saved compared with the building brick moulding bed, the surface of the prefabricated plate is smooth, a waterproof layer can be directly constructed without plastering, and the labor, the materials and the time of a plastering procedure are saved;

3) The quality is ensured: the strength of the prefabricated plate tire membrane is far higher than that of the brick tire membrane, an adhesive can be used between the plates, and the prefabricated plate tire membrane is not easy to crack or collapse in the process of backfilling earthwork on the back of the plate;

4) The frame protrudes towards the soil filling surface, namely protrudes out of the back surface of the precast concrete slab, the formed soil filling groove can fill soil, the top of the frame is subjected to vertical gravity load of soil after the soil filling, the advantage of the integral stability of the precast slab tire is achieved, and the principle is the same as that of a wing plate of a concrete retaining wall belt;

5) The connecting surface of the frame is wider than the thickness of the precast slab (the thickness adopted by the utility model is 5 cm), so that the adhesive has a larger contact surface and larger adhesive force, the strength of the whole tire membrane is improved, and the deformation and the fracture are not easy to occur;

6) The section thickness of the plate is increased at the frame, so that the plate is not easy to crack integrally due to collision in transportation;

7) The tongue-and-groove structure is designed, so that the side force rigidity of a part of soil body can be provided, and then cementing materials can be saved during splicing.

8) The tank bottom both ends of board tongue-and-groove are provided with the triangular groove that closed angle is downward, and after two precast concrete boards splice, can form triangle concatenation reinforcing hole, can insert a screw thread reinforcing bar in two adjacent triangle concatenation reinforcing holes on the horizontal direction then, ensure the concatenation stability between the precast concrete board.

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a first exploded view of a basic prefabricated PC form according to the present utility model;

FIG. 2 is a second exploded view of the basic prefabricated PC form of the present utility model;

FIG. 3 is a schematic diagram of the assembly of a basic prefabricated PC form according to the present utility model;

FIG. 4 is a schematic cross-sectional view of a precast concrete panel according to the present utility model;

FIG. 5 is a schematic top view of a precast concrete panel according to the present utility model;

FIG. 6 is a schematic illustration of the application of the basic prefabricated PC form of the present utility model;

in the figure: 1-precast concrete base, 2-base mortises, 3-precast concrete slabs, 4-plate mortises, 5-tenons, 6-filling soil grooves, 7-frames, 8-reinforcing steel bar frames, 9-steel wire nets and 10-triangular grooves.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 5, the utility model provides a basic precast PC formwork for foundation pit modeling, which comprises precast concrete slabs 3 and precast concrete bases 1, wherein steel bars are embedded in the precast concrete slabs.

The precast concrete board 3 is square structure, and its upper and lower, left and right four sides all integrated into one piece have frame 7, and frame 7 stands out in precast concrete board 3's back to enclose into a fill groove 6, see that fig. 1, 3 show, upper portion's frame 7 top surface is provided with logical groove structure's tenon groove 4, and lower portion's frame 7 bottom surface is provided with tenon 5, and the tank bottom both ends of tenon groove 4 are provided with closed angle triangular groove 10 down, and the both ends of tenon groove 4 are deeper promptly, are triangular groove 10, and when the concatenation, the bellied groove flat bottom in the middle of tenon groove 4 is used for with tenon 5 contact.

The top edge of the precast concrete base 1 is provided with a base mortise 2, which is shown in figures 1 and 2.

For a certain precast concrete slab 3, the rabbet 5 can be matched and inserted into the base rabbet 2 to form a rabbet structure, as shown in fig. 3, or matched and inserted into the plate rabbet 4 of other precast concrete slabs 3 to form a rabbet structure, and triangular splicing reinforcement holes which are positioned at two ends of the rabbet structure and are downward in tip. As shown in fig. 6, the bottom is the precast concrete base 1, other parts are assembled by precast concrete boards 3 through a tongue-and-groove structure (60 ° is assembled and indicated, namely, outwards inclined, in addition, can be assembled into 90 °), the formed triangular splicing reinforcing holes are hidden therein, the triangular splicing reinforcing holes are formed by the bottom surfaces of tenons 5 and triangular grooves 10, when in splicing, the threaded steel bars of phi 14 are inserted into the triangular splicing reinforcing holes, namely, for two triangular splicing reinforcing holes butted in the horizontal direction, two half sections of the threaded steel bars are respectively inserted into the triangular splicing reinforcing holes, namely, adjacent precast boards are connected by the threaded steel bars, and due to the triangular structure with downward tips, the threaded steel bars can be firmly clamped under the action of self gravity, so that the splicing stability between the precast concrete boards is ensured, and the spliced boards formed after the precast concrete boards are spliced are flat. Each precast concrete slab 3 is contacted through a frame 7, and the contact surfaces of the frames 7 are all made of adhesive, so that the splicing firmness is improved.

Volume weight of reinforced concrete precast slab (24 KN/m) ³ ) Is larger than brick wall (16 KN/m) ³ ) The strength of the plate is greatly higher than that of the brick wall, so that the thickness of the precast slab is not required to be referred to the thickness of the brick wall, and only the requirements of stability and flatness can be met, and the waste of excessive quality is not required to be caused.

Therefore, in the present utility model, the thickness of the precast concrete panel 3 is designed to be 5cm. The precast concrete slab 3 comprises a steel bar frame 8 and a steel wire mesh 9 positioned in the steel bar frame 8, the steel bar frame 8 is surrounded by phi 6 steel bars arranged along the length direction of the frame 7, and the steel wire mesh 9 is formed by interweaving steel wires of phi 1.2, as shown in figure 4. According to multiple test practices, the reinforced concrete slab with the thickness of 5cm can meet the use requirement.

The prefabricated plate has higher hardness, but the prefabricated plate has thinner thickness of 5cm, insufficient flexibility, easy breakage and small loss in the transportation and installation processes. Therefore, glass fiber filaments are doped in the precast concrete slab 3 and the precast concrete base 1, and the glass fiber has high tensile strength and high elongation, so that the bending resistance and the impact resistance of the concrete sheet can be improved, and the cracking can be prevented.

When the foundation prefabricated PC template is applied to foundation pit modeling, the surface of a foundation cushion layer needs to be cleaned, and corners are installed firstly, namely, a prefabricated concrete base 1 is installed firstly, a base mortice is utilized to carry out a base horizontal positioning groove, and then the next procedure is carried out, so that the foundation control elevation is stabilized. After the precast concrete foundation 1 is installed, the precast concrete panel 3 thereon is installed. The height of the foundation pit bearing platform is less than 600mm, and the precast concrete board 3 (bearing platform side mould) is manufactured and molded at one time; the height of the bearing platform is more than or equal to 600mm, a mode of assembling a plurality of precast concrete boards 3 is adopted, the precast concrete boards are connected by an adhesive while being installed, in the process of assembling, the threaded reinforcing steel bars with phi 14 are inserted into the triangular splicing reinforcing holes, and fig. 6 is a form example after the precast concrete boards are assembled.

After the foundation pit modeling is completed for 1 day, the back earth backfilling can be performed. During backfilling, a method of thin backfilling, slow speed and multiple times is adopted, manual backfilling is adopted, the thickness of the backfill soil Fang Yici is not more than 250mm, wherein a part of backfill soil can be filled into the backfill soil groove 6 on the back of the precast concrete slab 3, so that the precast concrete slab 3 and the backfill soil are tightly combined; the protection work of the precast concrete board 3 is needed to be done in the backfill soil stratified ramming, and the precast concrete board 3 is prevented from being damaged.

In the present utility model, the precast concrete panel 3 has a thickness of 5cm, and the side length specification thereof may be 300 x 1200/400 x 1200/500 x 1200/600 x 1200, units of mm.

When the foundation prefabricated PC template is installed, a commonly adopted hoisting machine is a tower crane or an automobile crane, and the machine comprises a steel beam, a hanging grab, a shackle, an anti-falling device, a hanging rope and the like.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (4)

1. The foundation precast PC formwork is characterized by comprising precast concrete slabs (3) and precast concrete bases (1) which are embedded with reinforcing steel bars;

the precast concrete board (3) is of a square structure, frames (7) are integrally processed on the upper side, the lower side, the left side and the right side of the precast concrete board, the frames (7) are prominently arranged on the back surface of the precast concrete board (3) and enclose a soil filling groove (6), a board tenon groove (4) of a through groove structure is formed in the top surface of the upper frame (7), tenons (5) are arranged on the bottom surface of the lower frame (7), and triangular grooves (10) with downward sharp angles are formed in two ends of the groove bottom of the board tenon groove (4);

the top edge of the precast concrete base (1) is provided with a base mortise (2);

for a certain precast concrete board (3), the rabbet (5) can be matched and inserted into the base rabbet (2) to form a rabbet structure, or the rabbet structure is formed by matching and inserting the board rabbets (4) of other precast concrete boards (3), and triangular splicing reinforcing holes are arranged at two ends of the rabbet structure.

2. A basic prefabricated PC formwork according to claim 1, characterized in that the thickness of the precast concrete panel (3) is 5cm.

3. The basic prefabricated PC formwork according to claim 1, characterized in that the precast concrete slab (3) comprises a steel bar frame (8) and a steel wire mesh (9) located in the steel bar frame (8), the steel bar frame (8) is surrounded by phi 6 steel bars arranged along the length direction of the frame (7), and the steel wire mesh (9) is formed by interweaving steel wires of phi 1.2.

4. A basic prefabricated PC formwork according to claim 1 or 3, characterized in that glass filaments are incorporated in both the precast concrete panel (3) and precast concrete foundation (1).

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