Fabricated independent foundation and construction method thereof

Abstract

The invention relates to an assembly type independent foundation and a construction method thereof, the independent foundation comprises a short column and a plurality of groove type foundation blocks, and the short column and the groove type foundation blocks are all prefabricated parts; a plurality of groove-shaped foundation blocks are spliced into an assembly foundation layer, connecting fin plates are arranged at the bottoms of the short columns, and the connecting fin plates are inserted into the assembly foundation layer and fixedly connected with at least part of the groove-shaped foundation blocks; the groove openings of at least part of the groove type foundation blocks face upwards, and groove cavities of the groove type foundation blocks are filled with concrete filling blocks in a cast-in-place mode. According to the invention, the plurality of groove-shaped foundation blocks are spliced to form the assembled foundation layer, and the connection between the short columns and the foundation layer is realized through the connecting fin plates, so that the construction is convenient, and the assembly construction is facilitated; the groove-shaped foundation block is light in weight and easy to hoist, adjust on-site positions and the like; by means of limited types of prefabricated parts and different combinations, the prefabricated parts can adapt to various application environments, adjustment is flexible and convenient, the field installation efficiency is high, and the field construction period is greatly shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a prefabricated independent foundation and a construction method thereof. Background Art

[0002] The main transformer, that is, the main transformer, is the core part of the substation. The main transformer foundation is a structure for installing the main transformer equipment, generally including a foundation layer and piers (short columns) arranged on the foundation layer for supporting the upper equipment. The traditional main transformer foundation is generally a cast-in-place concrete foundation, which requires operations such as on-site formwork support, steel bar binding, pouring, and curing, with a long construction period and high labor intensity for workers. At present, with the development of prefabrication construction technology, the main transformer foundation also gradually adopts prefabrication construction technology.

[0003] The existing prefabricated independent foundation is usually planned according to the on-site drawings, and the precast members of the foundation layer and the short column precast members are prefabricated offline, and then transported and hoisted to the site for installation. However, the precast members of the foundation layer have problems such as large volume and heavy weight, resulting in relatively high transportation and on-site hoisting costs. Moreover, generally only the foundation layer with the target shape and specifications can be assembled, with relatively small adjustability and variability, and a small scope of application. Summary of the Invention

[0004] In view of the technical defects and drawbacks existing in the prior art, the embodiments of the present invention provide a prefabricated independent foundation and a construction method thereof that overcome or at least partially solve the above problems.

[0005] The prefabricated independent foundation includes a short column and a plurality of trough-shaped foundation blocks, and both the short column and the trough-shaped foundation blocks are precast members;

[0006] A plurality of the trough-shaped foundation blocks are assembled into an assembled foundation layer, a connecting wing plate is provided at the bottom of the short column, and the connecting wing plate is inserted into the assembled foundation layer and fixedly connected to at least part of the trough-shaped foundation blocks;

[0007] At least part of the trough-shaped foundation blocks have their trough openings facing upward, and concrete filling blocks are cast and filled in the trough cavities of these trough-shaped foundation blocks.

[0008] Preferably, a plurality of the trough-shaped foundation blocks are arranged in an array and are spaced apart from each other to form gap grooves, and there are a plurality of the connecting wing plates which are respectively inserted into the respective gap grooves, and each connecting wing plate is fixedly connected to the two adjacent trough-shaped foundation blocks respectively.

[0009] Preferably, the connecting wing plate is fixedly connected to the corresponding trough-shaped foundation block by bolts.

[0010] Preferably, the width of the connecting wing plate gradually increases from top to bottom.

[0011] Preferably, a cast-in-place concrete layer is formed above the assembled foundation layer, and the cast-in-place concrete layer is integrally cast with the concrete filling block.

[0012] Preferably, the bottom surface of the short column abuts against the cast-in-place concrete layer.

[0013] Preferably, the bottom surface of the short column abuts against the trough-shaped foundation block directly below, so that the short column is partially embedded in the cast-in-place concrete layer.

[0014] Preferably, cushion channel holes are provided on the bottom plate of at least some of the trough-shaped foundation blocks with the notch facing upwards.

[0015] Preferably, the shapes and specifications of the trough-shaped foundation blocks are the same.

[0016] The construction method of the prefabricated independent foundation includes:

[0017] Prefabricating the short column and each trough-shaped foundation block;

[0018] Assembling a plurality of the trough-shaped foundation blocks into an assembled foundation layer, inserting the connecting wing plates of the short column into the assembled foundation layer and fixedly connecting them to the corresponding trough-shaped foundation blocks;

[0019] Casting the concrete filling block in place.

[0020] The present invention has the following beneficial effects:

[0021] In the present invention, a plurality of trough-shaped foundation blocks are assembled into an assembled foundation layer, and the connection between the short column and the foundation layer is realized through the connecting wing plates, which is convenient for construction and facilitates prefabricated construction; the trough-shaped foundation blocks are light in weight, making it easy to hoist and adjust the on-site position, etc.;

[0022] Through a limited variety of prefabricated components, through different combinations, it can adapt to a variety of application environments, with flexible and convenient adjustment, high on-site installation efficiency, and greatly reducing the on-site construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the prefabricated independent foundation provided by the embodiment of the present invention;

[0024] Figure 2 is Figure 1 exploded structural diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0026] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a prefabricated independent foundation, including a short column 1 and a plurality of trough-shaped foundation blocks 2. The short column 1 and the trough-shaped foundation blocks 2 are both prefabricated components;

[0027] A plurality of the trough-shaped foundation blocks 2 are assembled into an assembled foundation layer. A connecting wing plate 11 is provided at the bottom of the short column 1. The connecting wing plate 11 is inserted into the assembled foundation layer and fixedly connected to at least part of the trough-shaped foundation blocks 2;

[0028] At least part of the trough-shaped foundation blocks 2 have their trough openings facing upwards, and concrete filling blocks are cast in the trough cavities of these trough-shaped foundation blocks 2.

[0029] As Figure 1 and Figure 2 shown, the trough-shaped foundation block 2 includes a bottom plate and an annular side enclosure. The annular side enclosure is arranged on the bottom plate and encloses to form the trough cavity of the trough-shaped foundation block 2. The end of the annular side enclosure far from the bottom plate is open, which constitutes the trough opening of the trough-shaped foundation block 2.

[0030] Optionally, the cross-section of the above-mentioned annular side enclosure is rectangular, that is, it is a square annular side enclosure including four side walls of the foundation block; in another embodiment, the cross-section of the above-mentioned annular side enclosure can also be in the shape of a cylindrical ring or the like, or can be in a special shape.

[0031] In one embodiment, as Figure 1 and Figure 2 shown, a plurality of the trough-shaped foundation blocks 2 are arranged in an array and are spaced apart from each other to form a gap groove 20. There are a plurality of connecting wing plates 11 which are respectively inserted into the gap grooves 20. Each connecting wing plate 11 is fixedly connected to two adjacent trough-shaped foundation blocks 2 respectively. This structure can effectively ensure the installation reliability of the short column 1 and the bonding reliability with the foundation layer.

[0032] Optionally, as Figure 1 and Figure 2 shown, directly below the short column 1 are four trough-shaped foundation blocks 2 arranged in an array. Two columnar gap grooves 20 and two row-wise gap grooves 20 are formed between the four trough-shaped foundation blocks 2. Correspondingly, there are four connecting wing plates 11 which are respectively inserted into the four gap grooves 20.

[0033] The two plate surfaces of the connecting fin plate 11 are preferably respectively in contact with two adjacent trough-shaped foundation blocks 2 to further ensure the connection reliability between the short column 1 and the foundation layer.

[0034] Take the square ring side of the slot-type foundation block 2 as an example. Figure 1 and Figure 2 The four gap grooves 20 are all rectangular grooves, and the connecting fin plate 11 is correspondingly a flat plate. The thickness of the connecting fin plate 11 is the same as the groove width of the gap groove 20.

[0035] The four gap grooves 20 are interconnected, and correspondingly, the four connecting fins 11 are intersected and connected, including but not limited to making the four connecting fins 11 integrally formed, which can further improve the connection integrity and coordinated force bearing properties of each groove-shaped foundation block 2 and the short column 1.

[0036] For the connection between the connecting fin plate 11 and the trough-type foundation block 2, preferably, a bolted connection is adopted. Accordingly, Figure 1 and Figure 2 Bolt mounting holes 30 are provided on the annular side of the trough-shaped foundation block 2, and matching bolt mounting holes 30 are also provided on the connecting fin plate 11. When the connecting fin plate 11 is fixedly connected to two adjacent trough-shaped foundation blocks 2, bolts are sequentially passed through one trough-shaped foundation block 2, the connecting fin plate 11, and the other trough-shaped foundation block 2 before being tightened with nuts. This not only facilitates bolt assembly, but also ensures that the two adjacent trough-shaped foundation blocks 2 are connected as a whole and bear force in a coordinated manner, thereby further improving the application reliability of the prefabricated independent foundation.

[0037] There are multiple bolt mounting holes 30 on the connecting fin plate 11 , and the bolt mounting holes 30 on the annular side are designed to be matched, which can further ensure the connection reliability between the short column 1 and the foundation layer.

[0038] Based on the groove structure of the groove-type foundation block 2, especially the groove-type foundation block 2 with the groove facing upward, the bolt installation and locking operations can be conveniently performed, thereby improving the construction efficiency and construction quality; the bolt assembly operation can be performed after the groove-type foundation block 2 and the short column 1 are hoisted into place, so that the hoisting construction of the groove-type foundation block 2 and the short column 1 can be performed separately and independently, and the construction convenience, safety and construction quality can be improved.

[0039] Optionally, when long bolts are used and part of the studs extend into the concrete filling block, the integration between the concrete filling block and the trough foundation block 2 can be correspondingly improved, as well as the connection reliability between the connecting fin plate 11 and the trough foundation block 2; therefore, the bolts can be double-headed studs, with both ends of the studs respectively extending into the trough cavities of the corresponding two trough foundation blocks 2 and being consolidated by the corresponding concrete filling blocks.

[0040] Taking the intersection of the four gap grooves 20 directly below the short column 1 as the groove intersection point, the groove-shaped base block 2 directly below the short column 1 is defined as the reference base block; optionally, a buckle plate extends from one end of the connecting fin 11 away from the groove intersection point, and the dihedral angle between the plate surface of the buckle plate and the plate surface of the connecting fin 11 is greater than 0° and less than or equal to 90°, and the buckle plate abuts against the side wall of the adjacent reference groove-shaped base block 2 away from the groove intersection point. In this way, the constraint effect of the base layer on the short column 1 can be better, ensuring the structural stability of the short column 1, and improving the anti-tilting and anti-shaking effects of the short column 1, thereby improving the application reliability of the independent foundation. Taking the example that the reference base block adopts a square annular side enclosure, the connecting fin 11 and the buckle plate extending from one end thereof respectively abut against the side walls of the adjacent two base blocks of the same reference base block.

[0041] In one embodiment, a cast-in-place concrete layer is formed above the assembled base layer, and the cast-in-place concrete layer is integrally cast with the concrete filling block. That is, when constructing the cast-in-place concrete layer, the concrete also fills the cavity of the groove-shaped base block 2. This not only facilitates construction, but more importantly, makes each groove-shaped base block 2 better connected as a whole, ensuring that the base layer better supports the short column 1 and the equipment above, and improving the application reliability of the prefabricated independent foundation.

[0042] In addition, it can be understood that when constructing the cast-in-place concrete layer, the concrete also fills the gap grooves 20 between the groove-shaped base blocks 2.

[0043] Furthermore, the bottom surface of the short column 1 abuts against the cast-in-place concrete layer, ensuring the support reliability of the base layer for the short column 1. In another embodiment, the bottom surface of the short column 1 abuts against the groove-shaped base block 2 directly below, so that the short column 1 is partially buried in the cast-in-place concrete layer, that is, the cast-in-place concrete layer wraps part of the column body of the short column 1. This structure can further improve the structural reliability and mechanical properties of the short column 1.

[0044] Among them, the cast-in-place concrete layer will wrap each connecting fin 11. This method can improve the constraint effect of the base layer on the short column 1 and also improve the structural integrity between the short column 1 and the base layer; in particular, one or more ribs are convexly provided on the connecting fin 11, and these ribs extend into the cast-in-place concrete layer, which can further improve the structural integrity and cooperative stress of the short column 1 and the cast-in-place concrete layer. The load of the short column 1 can be reliably transmitted to the cast-in-place concrete layer and each groove-shaped base block 2 through the connecting fin 11, thus correspondingly improving the application reliability of the prefabricated independent foundation.

[0045] Optionally, as Figure 1 and Figure 2, the width of the connecting wing plate 11 gradually increases from top to bottom. Among them, in addition to the height parameter in the vertical direction and the thickness parameter matching the above-mentioned gap groove 20, the other dimension parameter in the horizontal direction of the connecting wing plate 11 is the width parameter. Based on this design, the restraint effect of the cast-in-place concrete layer on the connecting wing plate 11 and the short column 1 can be improved, and the anti-tilting and anti-shaking capabilities of the short column 1 can be enhanced.

[0046] Preferably, the notches of all the trough-shaped foundation blocks 2 face upward; in another embodiment, the notches of a small number of trough-shaped foundation blocks 2 can face downward, and a concrete pouring channel is opened on the bottom plate (which is the top of the trough-shaped foundation block 2 at this time) of these trough-shaped foundation blocks 2. This concrete pouring channel can also be used as a channel for bolt assembly operations, and / or a bolt assembly operation channel is opened on the side walls of these trough-shaped foundation blocks 2, and this bolt assembly operation channel can also be used as a concrete pouring channel.

[0047] Preferably, cushion channel holes are provided on the bottom plates of at least some of the trough-shaped foundation blocks 2 with notches facing upward. When pouring concrete into the trough-shaped foundation blocks 2, the concrete also fills the gaps between the trough-shaped foundation blocks 2 and the underlying foundation through the cushion channel holes, further improving the structural reliability of the assembled independent foundation.

[0048] In this embodiment, a plurality of trough-shaped foundation blocks 2 are assembled into an assembled foundation layer, and the connection between the short column 1 and the foundation layer is realized through the connecting wing plate 11, which is convenient for construction and facilitates assembled construction; through a limited variety of precast components, through different combinations, it can adapt to various application environments (such as main transformer foundations, independent foundations of multi-story buildings, etc.), with flexible and convenient adjustment, high on-site installation efficiency, and greatly reducing the on-site construction period.

[0049] Preferably, the shapes and specifications of the trough-shaped foundation blocks 2 are the same, which is convenient for standardized precast production.

[0050] The embodiment of the present invention also provides a construction method for the above-mentioned assembled independent foundation, including:

[0051] Precast the short column 1 and each of the trough-shaped foundation blocks 2;

[0052] Assemble a plurality of the trough-shaped foundation blocks 2 into an assembled foundation layer, insert the connecting wing plate 11 of the short column 1 into the assembled foundation layer and fixedly connect it to the corresponding trough-shaped foundation block 2;

[0053] Cast the concrete filling block.

[0054] Among them, the short column 1 can be installed after each trough-shaped foundation block 2 is in place, or the trough-shaped foundation blocks 2 and the short column 1 can be installed synchronously.

[0055] For other construction steps of the prefabricated independent foundation, such as the construction of the cast-in-place concrete layer, etc., they have been described in the previous content and will not be elaborated here.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembled independent foundation, characterized in that, It includes a short column and a plurality of grooved foundation blocks, both the short column and the grooved foundation blocks are precast components; The plurality of grooved foundation blocks are assembled into an assembled foundation layer. A connecting wing plate is provided at the bottom of the short column, and the connecting wing plate is inserted into the assembled foundation layer and fixedly connected to at least part of the grooved foundation blocks; The notch of at least part of the grooved foundation blocks faces upward, and a concrete filling block is cast in situ in the cavity of these grooved foundation blocks.

2. The prefabricated independent foundation according to claim 1, wherein The plurality of grooved foundation blocks are arranged in an array, and a gap groove is formed by spacing between adjacent grooved foundation blocks. There are a plurality of connecting wing plates which are respectively inserted into each gap groove, and each connecting wing plate is fixedly connected to two adjacent grooved foundation blocks respectively.

3. The prefabricated independent foundation according to claim 1, characterized in that, The connecting wing plate is fixedly connected to the corresponding grooved foundation block by bolts.

4. The prefabricated independent foundation according to claim 1, wherein, The width of the connecting wing plate gradually increases from top to bottom.

5. The prefabricated independent foundation according to any one of claims 1 to 4, characterized in that, A cast-in-situ concrete layer is formed above the assembled foundation layer, and the cast-in-situ concrete layer is integrally cast with the concrete filling block.

6. The prefabricated independent foundation according to claim 5, wherein The bottom surface of the short column abuts against the cast-in-situ concrete layer.

7. The prefabricated independent foundation according to claim 5, characterized in that, The bottom surface of the short column abuts against the grooved foundation block directly below, so that the short column is partially buried in the cast-in-situ concrete layer.

8. The prefabricated independent foundation according to claim 1, characterized in that, Pad channel holes are provided on the bottom plates of at least part of the grooved foundation blocks with the notch facing upward.

9. The prefabricated independent foundation according to claim 1, wherein The shapes and specifications of the grooved foundation blocks are the same.

10. The construction method of the prefabricated independent foundation according to any one of claims 1 to 9, characterized in that, The construction method includes: Precasting the short column and each grooved foundation block; Assembling the plurality of grooved foundation blocks into an assembled foundation layer, inserting the connecting wing plate of the short column into the assembled foundation layer and fixedly connecting it to the corresponding grooved foundation block; Casting the concrete filling block in situ.

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