Fully-prefabricated plate-type foundation structure

Abstract

The utility model provides a fully prefabricated assembly type plate foundation structure which comprises a plurality of bottom layer plate units and a plurality of top layer plate units, the bottom layer plate units are spliced in parallel to form an assembly type bottom layer plate, and the top layer plate units are laid on the upper end face of the assembly type bottom layer plate in parallel. The top layer plate units are spliced to form an assembly type top layer plate, the bottom layer plate units are perpendicular to the top layer plate units, a plurality of spiral anchors are arranged at the bottom of the assembly type bottom layer plate, and rubber pads with the thickness of 5-10 mm are arranged at the contact positions of the top end faces of the spiral anchors and the assembly type bottom layer plate. The whole construction process of the foundation is subjected to specialized subdivision according to foundation pit excavation, cushion layer making, assembly hoisting and backfilling, streamlined continuous operation is achieved, construction quality is guaranteed, construction efficiency is improved at the same time, and according to the technical scheme, the foundation is convenient to assemble, high in construction efficiency and low in construction cost. The method is especially suitable for emergency engineering, first-aid repair engineering and other engineering with short construction period.

Description

Technical Field

[0001] The utility model patent relates to the field of building prefabricated foundations, and particularly relates to a fully prefabricated plate foundation structure. Background Art

[0002] As an advanced technical form, building prefabrication technology has the advantages of high engineering quality, fast construction speed, environmental friendliness, convenient construction, low on-site management and labor costs. However, the existing building prefabrication technology mainly targets the situation where both uplift and down-pressure conditions play a controlling role. This makes the building foundation mainly bear vertical pressure, and the horizontal and uplift forces received are very small. For the situation where the foundation mainly bears vertical pressure and the bearing capacity of the upper soil layer is very low, if the buried depth of the plate foundation is relatively shallow and the bottom is located in soft soil, it is difficult for the foundation bearing capacity to meet the design requirements. In view of the above situation, the utility model patent constructs a fully prefabricated plate foundation structure. Summary of the Utility Model

[0003] The utility model provides a fully prefabricated plate foundation structure.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A fully prefabricated plate foundation structure includes a plurality of bottom plate units and a plurality of top plate units. The plurality of bottom plate units are spliced in parallel to form a prefabricated bottom plate. A plurality of the top plate units are laid parallel on the upper end surface of the prefabricated bottom plate. The top plate units are spliced to form a prefabricated top plate. The bottom plate units and the top plate units are arranged perpendicular to each other. A plurality of screw anchors are provided at the bottom of the prefabricated bottom plate. A rubber pad with a thickness of 5 - 10 mm is provided at the contact part between the top end face of the screw anchor and the prefabricated bottom plate. A bearing platform main column is provided above the prefabricated top plate.

[0006] Further, the bearing platform main column, the prefabricated top plate, and the prefabricated bottom plate are coaxially arranged and the cross-sectional areas of the three increase in sequence. The bearing platform main column, the prefabricated top plate, and the prefabricated bottom plate are in a stepped shape.

[0007] Further, the screw anchors are arranged in a central symmetry along the axis of the bearing platform main column. The actual installation quantity of the screw anchors can be installed according to actual needs.

[0008] Further, the width of the bottom plate unit is not greater than 2.4 m.

[0009] Further, the width of the top plate unit is greater than the width of the bottom plate unit.

[0010] Furthermore, when the top slab unit is laid, the top slab unit is laid on the joint formed between two bottom slab units.

[0011] Benefits: The utility model is a fully prefabricated assembled plate foundation structure, which is mainly used in areas with soft surface soil that bear vertical forces. During the entire assembly process, the main columns of the pedestal, the assembled bottom plate, and the assembled top plate are all prefabricated in advance. During the assembly process, the prefabricated modules are directly stacked in the form of building blocks, without the need to use channel steel and other materials for welding or bolting, and without the need to set up post-casting strips, which can greatly improve the efficiency of on-site construction. The spiral anchor is driven into the hard soil layer, so that the spiral anchor provides local bearing capacity through the friction between itself and the soil around it, and strengthens the bearing capacity of the foundation structure to bear vertical forces. Brief Description of the Figures

[0012] Figure 1 It is a three-dimensional structural diagram of a fully prefabricated assembled plate-type foundation structure of the utility model;

[0013] Figure 2 This is a front view of a fully prefabricated plate-type foundation structure of the utility model;

[0014] Figure 3 This is a top view of a fully prefabricated plate-type foundation mechanism of the utility model.

[0015] In the figure: 01 bottom plate unit, 02 top plate unit, 1 assembled bottom plate, 2 assembled top plate, 3 screw anchor, 4 main column of the foundation. Specific implementation method

[0016] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0018] Reference Figure 1As shown in Fig. –3, a fully prefabricated plate-type foundation structure in Embodiment 1 of the present utility model includes a plurality of bottom plate units 01 and a plurality of top plate units 02. Preferably, three bottom plate units 01 are provided, and three top plate units 02 are provided. Each top plate unit 02 and bottom plate unit 01 are internally provided with threaded hoisting components, and the threaded hoisting components cannot be exposed on the plate surface, and the flatness of each precast plate should meet the installation requirements. The plurality of bottom plate units 01 are arranged in parallel in sequence to form an assembled bottom plate 1. On the upper end surface of the assembled bottom plate 1, a plurality of top plate units 02 are arranged in parallel in sequence to form an assembled top plate 2. When the top plate units 02 are paved, the top plate units 02 are laid on the joints formed between two bottom plate units 01. Preferably, the top plate units 02 cover the joints formed pairwise between the three bottom plate units 01. When the three bottom plate units 01 are laid, their ends are arranged flush. When the three top plate units 02 are laid, their ends are also arranged flush. A plurality of screw anchors 3 are provided at the bottom of the assembled bottom plate 1. After the assembled top plate 2 is laid, the assembled top plate 2 covers the screw anchors 3 on the assembled bottom plate 1. A rubber pad with a thickness of 10 mm is provided at the contact part between the top end face of the screw anchor 3 and the assembled bottom plate 1. A bearing platform main column 4 is fixed at the center position of the upper end face of the assembled top plate 2. The bearing platform main column 4, the assembled top plate 2, and the assembled bottom plate 1 are coaxially arranged and their cross-sectional areas increase in sequence to form a stepped shape. The bearing platform main column 4, the bottom plate unit 01, and the top plate unit 02 are tied up with corresponding different steel bar structures in sequence and are cast in place in sequence. A horizontal concrete cushion is provided on the bottom end face of the assembled bottom plate 1. The screw anchors 3 are arranged in a central symmetry along the axis of the bearing platform main column 4. The actual installation quantity of the screw anchors 3 can be installed according to actual requirements, preferably 5. The bearing platform main column 4 can be a completely precast member, but when the height of the main column is relatively large and it is not convenient for overall transportation, the bearing platform main column 4 can be split into two parts for prefabrication, namely the bearing platform and the main column, with grouting sleeves inside, and the bearing platform and the main column are connected together by grouting at the construction site.

[0019] Reinforcing bars for bearing are provided at the lower part inside the bottom plate unit 01, and structural reinforcing bars are provided above the reinforcing bars for bearing. Only structural reinforcing bars are configured for the bearing platform. Composite screw anchors 3 are provided below the lower plate. Through the friction force existing between the screw anchors 3 and the surrounding soil, partial bearing capacity is provided in soft soil foundations. To improve the mechanical properties of the screw anchors 3, grouting can be carried out inside the anchor rods to improve the bearing capacity of the screw anchors 3.

[0020] A fully prefabricated plate - type foundation structure. During assembly, first, the main column 4 of the bearing platform, the bottom - layer plate unit 01, and the top - layer plate unit 02 need to be prefabricated in blocks in advance. Dig a foundation pit. After the foundation pit is completed, lay a concrete cushion at the bottom of the foundation pit to ensure the flatness of the bottom of the foundation pit. Drive the screw anchor 3 into the lower soil layer. A rubber pad with a thickness of 5 - 10 mm, preferably 10 mm, is provided at the top end of the screw anchor 3. The rubber pad is pasted on the bottom - layer plate. The rubber pad is used for the contact between the screw anchor and the bottom - layer plate to transfer the vertical force and can also be used for leveling to avoid large elevation errors between the screw anchors 3 after the construction of the screw anchors. On the concrete layer, splice multiple bottom - layer plate units 01 in sequence to form an assembled bottom - layer plate 1. On the upper surface of the assembled bottom - layer plate 1, lay multiple top - layer plate units 02 in sequence to form an assembled top - layer plate 2. The bottom - layer plate unit 01 and the top - layer plate unit 02 are arranged vertically. Then, place the main column 4 of the bearing platform on the upper surface at the center position of the assembled top - layer plate 2 in a soft - contact connection manner. It should be noted that the centers of the main column 4 of the bearing platform, the assembled top - layer plate 2, and the assembled bottom - layer plate 1 should be on the same axis and their cross - sectional areas increase successively from top to bottom. After completing the above steps, backfill and bury the foundation pit, and finally compact it.

[0021] As described above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A fully prefabricated plate-type foundation structure, characterized in that: The invention comprises a plurality of bottom plate units (01) and a plurality of top plate units (02); the plurality of bottom plate units (01) are spliced ​​in parallel to form an assembled bottom plate (1); the plurality of top plate units (02) are laid in parallel on the upper end surface of the assembled bottom plate (1); the top plate units (02) are spliced ​​to form an assembled top plate (2); the bottom plate units (01) and the top plate units (02) are arranged vertically; a plurality of spiral anchors (3) are arranged at the bottom of the assembled bottom plate (1); a rubber pad with a thickness of 5 to 10 mm is arranged at the contact portion between the top end surface of the spiral anchor (3) and the assembled bottom plate (1); and a main support column (4) is arranged on the upper part of the assembled top plate (2).

2. A fully prefabricated plate-type foundation structure according to claim 1, characterized in that: The base main column (4), the assembled top plate (2) and the assembled bottom plate (1) are coaxially arranged and their cross-sectional areas increase successively to form a step shape.

3. A fully prefabricated plate-type foundation structure according to claim 1, characterized in that: The spiral anchors (3) are arranged in a centrally symmetrical manner along the axis of the main column (4) of the foundation, and the actual number of spiral anchors (3) installed can be installed according to actual needs.

4. A fully prefabricated plate-type foundation structure according to claim 1, characterized in that: The width of the bottom floor plate unit (01) is not greater than 2.4 m.

5. The fully prefabricated plate-type foundation structure according to claim 1, characterized in that: The width of the top plate unit (02) is greater than the width of the bottom plate unit (01).

6. A fully prefabricated plate-type foundation structure according to claim 1, characterized in that: When the top slab unit (02) is laid, the top slab unit (02) is laid on the joint formed between the two bottom slab units (01) 2.

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