Precast concrete box type foundation for frozen soil environment

Abstract

The utility model relates to the technical field of precast concrete foundations, and discloses a precast concrete box type foundation for a frozen soil environment, which comprises a plurality of concrete precast box culverts connected with one another, each concrete prefabricated box culvert comprises a first box culvert plate and a second box culvert plate, and the first box culvert plate is connected to the top of the second box culvert plate; the first box culvert plate comprises a first supporting flat plate and a plurality of first supporting legs, and the first supporting legs are connected to the bottom of the first supporting flat plate; the second box culvert plate comprises a second supporting flat plate and a plurality of second supporting legs, and the second supporting legs are connected to the top of the second supporting flat plate. According to the precast concrete box type foundation for the frozen soil environment, the first box culvert plate and the second box culvert plate are arranged and poured correspondingly, the size of a single precast member is reduced, solidification is facilitated, and a permeable hollow channel is formed between a first supporting flat plate of the first box culvert plate and a second supporting flat plate of the second box culvert plate; and ventilation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of precast concrete foundations, in particular to a precast concrete box foundation for frozen soil environment. Background Technique

[0002] Overhead ventilation is a common form adopted for the foundation heat dissipation in frozen soil environment to prevent freeze-thaw settlement damage. The foundation structural forms include rubble, culverts, pile foundations, pier foundations, etc., to ensure the air circulation inside and outside the foundation and achieve heat dissipation.

[0003] It is not easy to obtain stones in polar environments. The grading and piling technology of rubble, the specifications and layout technology of culverts, and the pile driving depth technology have high requirements and are not easy to operate. Pile foundations are adopted to reduce the use of rubble. Commonly used cast-in-place pile foundations are adopted. Due to the large volume of cast-in-place pier foundations, it is difficult to hydrate and solidify in polar environments, and the strength requirements cannot be met, resulting in foundation safety problems such as insufficient bearing capacity. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a precast concrete box foundation for frozen soil environment, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical scheme: a precast concrete box foundation for frozen soil environment, comprising: a plurality of interconnected precast concrete box culverts;

[0006] Each of the precast concrete box culverts includes a first box culvert plate and a second box culvert plate, and the first box culvert plate is connected to the top of the second box culvert plate;

[0007] The first box culvert plate includes a first support flat plate and a plurality of first legs, and the plurality of first legs are connected to the bottom of the first support flat plate;

[0008] The second box culvert plate includes a second support flat plate and a plurality of second legs, and the plurality of second legs are connected to the top of the second support flat plate, and the plurality of second legs are respectively connected to the plurality of first legs;

[0009] A hollow channel is formed between the first support flat plate and the second support flat plate.

[0010] Preferably, both the first support flat plate and the second support flat plate are polygons, and the number of the first legs is the same as the number of the corners of the first support flat plate, and the number of the second legs is the same as the number of the corners of the second support flat plate.

[0011] Preferably, both the first support flat plate and the second support flat plate are circular, and the plurality of first legs are distributed in a circular array with the central axis of the first support flat plate as the array center, and the positions of the plurality of second legs respectively correspond to the positions of the plurality of first legs.

[0012] Preferably, positioning columns are provided at the bottoms of the plurality of first legs, positioning grooves are formed at the tops of the plurality of second legs, and the positioning columns are inserted into the inner walls of the positioning grooves.

[0013] Preferably, chamfered portions are provided at the internal corners where the first support flat plate and the first legs meet and at the internal corners where the second support flat plate and the second legs meet.

[0014] Preferably, a plurality of lifting anchor point members are embedded in both the first support flat plate and the second support flat plate.

[0015] Preferably, the lifting anchor point members are made of steel.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] 1. For the precast concrete box foundation used in frozen soil environment, by providing the first box culvert slab and the second box culvert slab, pouring the first box culvert slab and the second box culvert slab respectively, the volume of a single precast member is reduced, which is convenient for solidification, and a hollow channel is formed between the first support flat plate of the first box culvert slab and the second support flat plate of the second box culvert slab, which is convenient for ventilation.

[0018] 2. For the precast concrete box foundation used in frozen soil environment, by providing positioning columns and positioning grooves, after the site is leveled, the second box culvert slab part is hoisted and placed, and then the first box culvert slab part is hoisted and placed. The positioning columns on the first legs of the first box culvert slab are inserted into the positioning grooves on the second legs of the second box culvert slab to complete the docking of the first box culvert slab and the second box culvert slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a side view structural schematic diagram of the present utility model;

[0021] Figure 3 is a structural schematic diagram of the first box culvert slab of the present utility model;

[0022] Figure 4 is a structural schematic diagram of the second box culvert slab of the present utility model.

[0023] In the figure: 1. First box culvert slab; 11. First support flat plate; 12. First legs; 2. Second box culvert slab; 21. Second support flat plate; 22. Second legs; 3. Hollow channel; 4. Positioning column; 5. Positioning groove; 6. Chamfered portion; 7. Lifting anchor point member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-3 , a precast concrete box foundation for frozen soil environment, comprising: a plurality of interconnected concrete precast box culverts, each concrete precast box culvert includes a first box culvert plate 1 and a second box culvert plate 2, the first box culvert plate 1 is connected to the top of the second box culvert plate 2, the first box culvert plate 1 includes a first support flat plate 11 and a plurality of first legs 12, the plurality of first legs 12 are connected to the bottom of the first support flat plate 11, the second box culvert plate 2 includes a second support flat plate 21 and a plurality of second legs 22, the plurality of second legs 22 are connected to the top of the second support flat plate 21, and the plurality of second legs 22 are respectively connected to the plurality of first legs 12, a hollow channel 3 is formed between the first support flat plate 11 and the second support flat plate 21, a single concrete precast box culvert is stacked and combined by two parts of the first box culvert plate 1 and the second box culvert plate 2, and the space of the hollow channel 3 between the two parts is used for ventilation and heat dissipation, equipment installation and flaw detection and maintenance.

[0026] Both the first support flat plate 11 and the second support flat plate 21 are polygonal, and the number of the first legs 12 is the same as the number of the corners of the first support flat plate 11, and the number of the second legs 22 is the same as the number of the corners of the second support flat plate 21.

[0027] Both the first support flat plate 11 and the second support flat plate 21 are circular, and the plurality of first legs 12 are distributed in a circular array with the central axis of the first support flat plate 11 as the array center, and the positions of the plurality of second legs 22 respectively correspond to the positions of the plurality of first legs 12.

[0028] Positioning columns 4 are provided at the bottoms of the plurality of first legs 12, positioning grooves 5 are provided at the tops of the plurality of second legs 22, and the positioning columns 4 are inserted into the inner walls of the positioning grooves 5.

[0029] Chamfered portions 6 are provided at the intersection of the first support flat plate 11 and the first legs 12 and at the intersection of the second support flat plate 21 and the second legs 22. The chamfered portions 6 are added to reduce local stress concentration and facilitate demolding.

[0030] A plurality of lifting anchor points 7 are pre-embedded on both the first support flat plate 11 and the second support flat plate 21. The lifting anchor points 7 are made of steel and are used for lifting the first box culvert plate 1 or the second box culvert plate 2.

[0031] Before the installation of the precast box culvert, the site shall be excavated, backfilled and leveled; after the site is leveled, the second part of the box culvert plate 2 shall be hoisted and placed, and then the first part of the box culvert plate 1 shall be hoisted and placed. The positioning column 4 on the first leg 12 of the first box culvert plate 1 is inserted into the positioning groove 5 on the second leg 22 of the second box culvert plate 2 to complete the docking of the first box culvert plate 1 and the second box culvert plate 2. Repeat the operation until the installation of all precast box culverts is completed. After all precast box culverts are installed, the fixation between the precast box culverts shall be completed by means of grouting or mechanical connection.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast concrete box foundation for frozen soil environment, characterized in that, Including: A plurality of interconnected precast concrete box culverts; Each of the precast concrete box culverts includes a first box culvert plate (1) and a second box culvert plate (2), and the first box culvert plate (1) is connected to the top of the second box culvert plate (2); The first box culvert plate (1) includes a first support flat plate (11) and a plurality of first legs (12), and the plurality of first legs (12) are connected to the bottom of the first support flat plate (11); The second box culvert plate (2) includes a second support flat plate (21) and a plurality of second legs (22), the plurality of second legs (22) are connected to the top of the second support flat plate (21), and the plurality of second legs (22) are respectively connected to the plurality of first legs (12); A hollow channel (3) is formed between the first support flat plate (11) and the second support flat plate (21).

2. The precast concrete box foundation for permafrost environment according to claim 1, characterized in that Both the first support flat plate (11) and the second support flat plate (21) are polygons, and the number of the first legs (12) is the same as the number of the corners of the first support flat plate (11), and the number of the second legs (22) is the same as the number of the corners of the second support flat plate (21).

3. A precast concrete box foundation for permafrost environment according to claim 1, characterized in that, Both the first support flat plate (11) and the second support flat plate (21) are circular, and the plurality of first legs (12) are distributed in a circular array with the central axis of the first support flat plate (11) as the array center, and the positions of the plurality of second legs (22) respectively correspond to the positions of the plurality of first legs (12).

4. A precast concrete box foundation for a frozen soil environment according to claim 2 or 3, characterized in that, Positioning columns (4) are provided at the bottoms of the plurality of first legs (12), positioning grooves (5) are formed at the tops of the plurality of second legs (22), and the positioning columns (4) are inserted into the inner walls of the positioning grooves (5).

5. A precast concrete box foundation for permafrost environment according to claim 4, characterized in that, Chamfered portions (6) are provided at the internal obtuse angles where the first support flat plate (11) and the first legs (12) meet and at the internal obtuse angles where the second support flat plate (21) and the second legs (22) meet.

6. The precast concrete box foundation for permafrost environment according to claim 4, characterized in that, A plurality of lifting anchor point members (7) are embedded in both the first support flat plate (11) and the second support flat plate (21).

7. The precast concrete box foundation for permafrost environment according to claim 6, characterized in that The lifting anchor point member (7) is made of steel.

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