Orthogonal-diagonal modular assembly type grating raft foundation

Abstract

An orthogonal and diagonal modular assembly type grating raft foundation comprises a plurality of grating raft foundation units, each grating raft foundation unit is composed of a plurality of rib plates which are arranged in an orthogonal and diagonal crossed mode, a hollow cavity is defined by the rib plates, and the rib plates are also arranged in the orthogonal and diagonal crossed mode; external corner protrusions and internal corner recesses are continuously and alternately formed on the four edges of each grid raft foundation unit, shearing force protruding blocks and shearing force grooves are arranged on the external corner protrusions respectively, bolt penetrating holes are formed in the shearing force protruding blocks and the shearing force grooves, bolts are arranged in the bolt penetrating holes, and reserved mounting holes are formed in the grid raft foundation units. By means of the grid type foundation shape which is arranged in an orthogonal and oblique crossed mode, the grid type foundation can be transported to a site to be assembled in a modularized mode after being prefabricated, the structural strength is effectively guaranteed through the structural design, the use amount and the self weight of foundation concrete are reduced, transportation and carrying are convenient, meanwhile, the shear protrusions and the shear grooves are arranged in the assembly contact area, and the assembly contact area is not prone to deformation. Therefore, positioning and reinforcing can be carried out during assembly, and the structural strength cannot be obviously lost.

Description

Technical Field

[0001] The utility model relates to a raft foundation, belongs to the field of transformer equipment, and particularly relates to an orthogonal oblique modular assembled grid raft foundation. Background Art

[0002] At present, the foundations of main equipment in my country's substations mostly adopt traditional cast-in-place concrete column independent foundations. Usually, this type of foundation needs to go through on-site formwork, steel bar binding, concrete pouring, maintenance and other processes, resulting in a long construction period, inconsistent design dimensions of different foundations, a large number of consumed formwork types, and a high degree of construction complexity.

[0003] With the rapid development of construction technology, prefabricated and assembled structures have been vigorously promoted by the state and local governments for their modular design, industrialized production and green construction. Prefabricated and assembled technologies have been widely used in the construction of green substations. At present, the foundations of most domestic main transformers are still based on traditional cast-in-place concrete construction, but some research institutes and enterprises have conducted certain explorations, research and applications on the assembled foundations of main transformers. For example, in the "Force Performance and Numerical Analysis of GSU Module Assembled Foundation of Substation", a "GSU" composed of several modules suitable for the main transformer (GSU) equipment of green modular substations was designed. The GSU modular prefabricated foundation is composed of several prefabricated modular foundation units. Prefabricated concrete components can form one GSU prefabricated foundation modular unit. Four units are connected by horizontal sleeves to form a modular GSU prefabricated foundation as a whole. However, it simply splits the various components of a cast-in-place foundation, such as foundation beams and pedestals, into several prefabricated components, or splits one component into several components. This will reduce the strength of the foundation to a certain extent, and there is no innovation in the structural form. There are problems such as reduced strength, large amount of concrete, heavy foundation self-weight, and inconvenient transportation. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned defects and problems existing in the prior art and to provide an orthogonal oblique modular assembled grid raft foundation which not only has good strength but also can effectively reduce the amount of concrete.

[0005] To achieve the above purpose, the technical solution of the utility model is: an orthogonal oblique modular assembled grid raft foundation, the grid raft foundation includes a plurality of grid raft foundation units, the grid raft foundation units are composed of a plurality of ribs arranged orthogonally obliquely and crosswise, and hollow cavities are formed between two adjacent ribs, and the plurality of hollow cavities are arranged orthogonally obliquely and crosswise;

[0006] The four sides of the grid raft basic unit are continuously and alternately formed into positive corner protrusions and negative corner depressions, and the positive corner protrusions on the opposite sides of the grid raft basic unit are respectively provided with shear protrusions and shear grooves, and the shear protrusions and shear grooves are used for splicing and assembling between two horizontally opposite grid raft basic units;

[0007] A plurality of bolt through holes are provided on the shear force protrusions and the shear force grooves, and bolts for fixing the grid raft foundation units which are horizontally spliced ​​and assembled in pairs are arranged in the plurality of bolt through holes;

[0008] The grid raft foundation unit is provided with reserved installation holes for installing a transformer foundation or assembling two grid raft foundation units vertically relative to each other.

[0009] The shearing protrusion is vertically arranged along the height direction of the grid raft foundation unit, one end of the shearing protrusion is flush with the top surface of the grid raft foundation unit, and the other end of the shearing protrusion extends downward and does not exceed the bottom surface of the grid raft foundation unit;

[0010] The shearing force protrusion comprises a protrusion body and a plurality of protrusions. The protrusion body is a long rectangular structure, and the plurality of protrusions are symmetrically spaced and distributed on both sides of the protrusion body.

[0011] The shear groove is vertically arranged along the height direction of the grid raft foundation unit, one end of the shear groove is flush with the top surface of the grid raft foundation unit, and the other end of the shear groove extends downward and does not exceed the bottom surface of the grid raft foundation unit;

[0012] The shear groove comprises a groove body and a plurality of grooves. The groove body is a long rectangular structure, and the plurality of grooves are symmetrically spaced and distributed on both sides of the groove body.

[0013] When two horizontally opposite grid raft foundation units are spliced ​​and assembled, the shear projections fit into the shear grooves.

[0014] When two horizontally opposite grid raft foundation units are spliced ​​and assembled, a gap for filling concrete mortar is formed between the shear projections and the shear grooves.

[0015] The turning point of the male corner protrusion is a chamfered structure, the shearing protrusion and the shearing groove are both arranged on the chamfered structure, and the turning point of the female corner depression is a rounded structure.

[0016] The four corner regions of the grid raft foundation unit are all chamfered structures, and the positive corner protrusions and negative corner depressions are alternately formed between two adjacent four corner regions.

[0017] The reserved installation holes are arranged at the orthogonal oblique intersections of two ribs, and connectors are arranged in the reserved installation holes. The connectors are used to connect and fix the substation foundation or the grid raft foundation units that are assembled vertically and oppositely in pairs.

[0018] A plurality of bolt through holes are vertically spaced and distributed on the shearing protrusion and the shearing groove.

[0019] A rectangular pad is arranged at the bottom of the grid raft foundation unit, and the top surface of the rectangular pad is inclined from four sides to the center.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model discloses an orthogonal oblique modular assembled grid raft foundation, which includes a plurality of grid raft foundation units. The grid raft foundation unit is composed of a plurality of ribs arranged orthogonally obliquely and crosswise. A hollow cavity is formed between two adjacent ribs, which are also arranged orthogonally obliquely and crosswise. The four sides of the grid raft foundation unit are continuously and alternately formed into positive corner protrusions and negative corner depressions. The positive corner protrusions are respectively provided with shear convex blocks or shear grooves. The shear convex blocks and the shear grooves can be coupled and matched with each other. The shear convex blocks and the shear grooves are both provided with a plurality of bolt through holes. Bolts for fixing are provided inside, and reserved installation holes for assembly are opened on the grid raft foundation unit. In the application of this design, the grid-type foundation shape formed by the orthogonal oblique cross arrangement can be prefabricated in the factory and then transported to the site for modular assembly. This structural design effectively ensures the structural strength, reduces the amount of foundation concrete, reduces the foundation's own weight, and facilitates transportation and handling. At the same time, shear protrusions and shear grooves are set in the assembly contact area to facilitate positioning and reinforcement during assembly without significantly losing structural strength.

[0022] 2. In an orthogonal oblique modular assembled grid raft foundation of the utility model, the turning point of the positive corner protrusion is a chamfered structure, the shear protrusion or the shear groove is arranged on the chamfered structure, and the turning point of the negative corner recess is a rounded structure; in the application of this design, the chamfered structure reduces the stress concentration of the right-angle structure, which is prone to breakage, and the rounded structure can further weaken the stress, and together they work together to improve the overall structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is one of the structural schematic diagrams of the utility model.

[0024] Figure 2 This is the second structural diagram of the present utility model.

[0025] Figure 3 It is a structural schematic diagram of the shearing protrusion in the utility model.

[0026] Figure 4 It is a top view of the utility model.

[0027] Figure 5 It is one of the extended example diagrams in Example 1 of the present utility model.

[0028] Figure 6 This is the second extended example diagram in Embodiment 1 of the present utility model.

[0029] Figure 7 This is an extended example diagram in Example 4 of the present utility model.

[0030] In the figure: grid raft foundation unit 1, rib 11, hollow cavity 12, positive corner protrusion 13, shear projection 131, projection body 1311, projection 1312, shear groove 132, groove body 1321, groove 1322, negative corner recess 14, bolt through hole 133, reserved installation hole 15, four corner area 16, connector 17, rectangular pad 2. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Embodiment 1:

[0033] See also Figure 1 , an orthogonal oblique modular assembled grid raft foundation, the grid raft foundation comprises a plurality of grid raft foundation units 1, the grid raft foundation unit 1 is composed of a plurality of ribs 11 arranged orthogonally obliquely and crosswise, a hollow cavity 12 is formed between two adjacent ribs 11, and a plurality of the hollow cavities 12 are arranged orthogonally obliquely and crosswise; the four sides of the grid raft foundation unit 1 are continuously and alternately formed into positive corner protrusions 13 and negative corner recesses 14, and the positive corner protrusions 13 on the opposite sides of the grid raft foundation unit 1 are respectively provided with shear protrusions 1 31 and shear grooves 132, the shear protrusions 131 and shear grooves 132 are used for splicing and assembling grid raft foundation units 1 that are horizontally opposite to each other in pairs; the shear protrusions 131 and the shear grooves 132 are each provided with a plurality of bolt through holes 133, and the plurality of bolt through holes 133 are each provided with bolts for fixing the grid raft foundation units 1 that are horizontally opposite to each other in pair; the grid raft foundation unit 1 is provided with reserved installation holes 15 for installing a transformer foundation or assembling grid raft foundation units 1 that are vertically opposite to each other.

[0034] In application, the grid raft foundation unit 1 formed by the ribs 11 arranged orthogonally and obliquely cross has a plurality of hollow cavities 12 arranged orthogonally and obliquely cross. Compared with the solid foundation with the same base area and the same bending stiffness, the hollow cavities of this design can effectively reduce the amount of concrete without reducing the bearing strength. Moreover, through modular assembly, there is no need for complex and time-consuming construction operations such as formwork, pouring and maintenance on site, which greatly simplifies the construction process and shortens the construction period.

[0035] See also Figure 5 During construction, two grid raft foundation units 1 can be assembled vertically relative to each other. Connectors 17 can be set in the reserved installation holes 15 in advance to perform positioning, limiting and fastening devices. Then, the connectors 17 are passed through the reserved installation holes 15 of the two grid raft foundation units 1 opposite to each other, and fastened to complete the stacking assembly. At the same time, the connectors 17 can also be used as connectors for the substation foundation placed on the grid raft foundation unit 1. When the reserved installation holes 15 are not needed, grouting and sealing can be performed.

[0036] See also Figure 6 During construction, two adjacent grid raft foundation units 1 are horizontally assembled relative to each other, the shear protrusion 131 of one grid raft foundation unit 1 is correspondingly spliced ​​with the shear groove 132 of other grid raft foundation units 1, and then the two are fastened by bolts passing through the bolt holes 133 to complete the horizontal assembly; the bolt holes 133 are respectively vertically arranged on the shear protrusion 131 and the shear groove 132, and preferably set to 2-4.

[0037] See also Figure 6 The grid raft foundation unit 1 can be in the form of three rows, four rows, or even a single row. It can be prefabricated into a corresponding shape according to the size and weight of the transformer it carries, and is not limited to the specific application. Figure 1 The two sides shown are respectively provided with shear protrusions 131 and shear grooves 132, or all four sides may be provided with shear protrusions 131 and shear grooves 132, or all four sides may be provided with shear protrusions 131 and shear grooves 132, or only one side may be provided with shear protrusions 131 and only one side may be provided with shear grooves 132, and so on.

[0038] Embodiment 2:

[0039] See also Figure 2-Figure 3The shear protrusion 131 is vertically arranged along the height direction of the grid raft base unit 1, one end of the shear protrusion 131 is flush with the top surface of the grid raft base unit 1, and the other end of the shear protrusion 131 extends downward and does not exceed the bottom surface of the grid raft base unit 1; the shear protrusion 131 includes a protrusion body 1311 and a plurality of protrusions 1312, the protrusion body 1311 is a long rectangular structure, and the plurality of protrusions 1312 are symmetrically spaced on both sides of the protrusion body 1311.

[0040] The shear groove 132 is vertically arranged along the height direction of the grid raft foundation unit 1, one end of the shear groove 132 is flush with the top surface of the grid raft foundation unit 1, and the other end of the shear groove 132 extends downward and does not exceed the bottom surface of the grid raft foundation unit 1; the shear groove 132 includes a groove body 1321 and a plurality of grooves 1322, the groove body 1321 is a long rectangular structure, and the plurality of grooves 1322 are symmetrically distributed on both sides of the groove body 1321.

[0041] In application, the shear protrusion 131 and the shear groove 132 have basically the same shape. Through the protrusions and depressions symmetrically distributed on the main body and both sides, they can be limited in all directions after coupling to avoid misalignment of the grid raft foundation after splicing, thereby affecting the support effect.

[0042] Embodiment 3:

[0043] When two horizontally opposite grid raft foundation units 1 are spliced ​​and assembled, the shear projections 131 fit into the shear grooves 132 .

[0044] In application, during assembly construction, the shear protrusions 131 and the shear grooves 132 fit together, and after fitting together, they can have better friction, so that the grid raft foundation units 1 assembled in pairs have better integrity and are not prone to shaking and bumping.

[0045] Embodiment 4:

[0046] See also Figure 7 When two horizontally opposite grid raft foundation units 1 are spliced ​​and assembled, a gap for filling concrete mortar is formed between the shear protrusions 131 and the shear grooves 132.

[0047] In application, during assembly construction, the shear protrusion 131 and the shear groove 132 can be coupled with each other, and a certain gap is formed between the two. This gap can be in all directions. By filling the gap with concrete mortar, the grid raft foundation units 1 assembled in pairs can be solidified to form a whole to enhance the structural strength. At the same time, it can also prevent the bolts from being exposed to the air, thereby preventing oxidation corrosion from causing a decrease in bearing capacity.

[0048] Embodiment 5:

[0049] The turning point of the male corner protrusion 13 is a chamfered structure, the shearing protrusion 131 or the shearing groove 132 is arranged on the chamfered structure, and the turning point of the female corner recess 14 is a rounded structure.

[0050] The four corner regions 16 of the grid raft foundation unit 1 are all chamfered structures, and the positive corner protrusions (13) and negative corner recesses 14 are alternately formed between the four corner regions 16 adjacent to each other.

[0051] In application, the stress of the right-angle structure is more concentrated and it is easy to be damaged. Therefore, the chamfered structure of the positive corner protrusion 13 is not only used to place the shear bump 131 or the shear groove 132, so that the relatively assembled grid raft foundation unit 1 can be tightly combined, but also reduces the occurrence of damage. The rounded corner structure of the negative corner recess 14 does not require other structures to be set up. Setting it as a rounded corner structure can further weaken the stress and improve the structural strength.

[0052] See also Figure 6 The chamfered structure of the four corner areas 16, after the grid raft foundation units 1 that are horizontally opposite to each other are spliced ​​and assembled, the area between the diagonals is also formed into a hollow cavity 12, ensuring the consistency of the overall structure.

[0053] Embodiment 6:

[0054] A rectangular pad 2 is provided at the bottom of the grid raft foundation unit 1, and the top surface of the rectangular pad 2 is inclined from four sides to the center.

[0055] See also Figure 1 In application, the rectangular pad 2 at the bottom of the grid raft foundation unit 1 can ensure the stress dispersion of the foundation, so that it can be placed on a relatively soft mud ground without sinking due to stress concentration, and the top surface of the rectangular pad 2 is inclined from the four sides to the center, which can provide lateral support for the rib 11, further ensuring the stability of the structure.

[0056] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limitations on the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An orthogonal oblique modular assembled grid raft foundation, characterized by: The grid raft foundation comprises a plurality of grid raft foundation units (1), wherein the grid raft foundation units (1) are composed of a plurality of ribs (11) arranged in an orthogonal, oblique and cross arrangement, and hollow cavities (12) are formed between two adjacent ribs (11), and the plurality of hollow cavities (12) are arranged in an orthogonal, oblique and cross arrangement; The four sides of the grid raft foundation unit (1) are continuously and alternately formed into positive corner protrusions (13) and negative corner recesses (14); the positive corner protrusions (13) on the opposite sides of the grid raft foundation unit (1) are respectively provided with shearing protrusions (131) and shearing grooves (132); the shearing protrusions (131) and shearing grooves (132) are used for splicing and assembling two grid raft foundation units (1) that are horizontally opposite to each other; A plurality of bolt through holes (133) are provided on the shear force protrusion (131) and the shear force groove (132), and bolts for fixing the grid raft foundation units (1) which are horizontally spliced ​​and assembled in pairs are arranged in the plurality of bolt through holes (133); The grid raft foundation unit (1) is provided with reserved installation holes (15) for installing a transformer foundation or for assembling two grid raft foundation units (1) vertically relative to each other.

2. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: The shearing protrusion (131) is vertically arranged along the height direction of the grid raft foundation unit (1), one end of the shearing protrusion (131) is flush with the top surface of the grid raft foundation unit (1), and the other end of the shearing protrusion (131) extends downward and does not exceed the bottom surface of the grid raft foundation unit (1); The shear force protrusion (131) comprises a protrusion body (1311) and a plurality of protrusions (1312); the protrusion body (1311) is a long rectangular structure; and the plurality of protrusions (1312) are symmetrically spaced and distributed on both sides of the protrusion body (1311).

3. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: The shear groove (132) is vertically arranged along the height direction of the grid raft foundation unit (1), one end of the shear groove (132) is flush with the top surface of the grid raft foundation unit (1), and the other end of the shear groove (132) extends downward and does not exceed the bottom surface of the grid raft foundation unit (1); The shear groove (132) comprises a groove body (1321) and a plurality of grooves (1322); the groove body (1321) is a long rectangular structure; and the plurality of grooves (1322) are symmetrically spaced and distributed on both sides of the groove body (1321).

4. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: When two horizontally opposite grid raft foundation units (1) are spliced ​​and assembled, the shear projections (131) fit into the shear grooves (132).

5. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: When two horizontally opposite grid raft foundation units (1) are spliced ​​and assembled, a gap for filling concrete mortar is formed between the shear projections (131) and the shear grooves (132).

6. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: The turning point of the male corner protrusion (13) is a chamfered structure, the shearing protrusion (131) and the shearing groove (132) are both arranged on the chamfered structure, and the turning point of the female corner recess (14) is a rounded structure.

7. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: The four corner regions (16) of the grid raft foundation unit (1) are all chamfered structures, and the positive corner protrusions (13) and negative corner recesses (14) are alternately formed between two adjacent four corner regions (16).

8. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: The reserved installation holes (15) are arranged at the orthogonal oblique intersections of two ribs (11), and a connecting piece (17) is arranged in the reserved installation holes (15). The connecting piece (17) is used to connect and fix the substation foundation or the grid raft foundation units (1) which are spliced ​​and assembled in pairs vertically relative to each other.

9. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: A plurality of bolt through holes (133) are vertically spaced and distributed on the shearing protrusion (131) and the shearing groove (132).

10. The orthogonal inclined modular assembled grid raft foundation according to claim 1, characterized in that: A rectangular pad (2) is provided at the bottom of the grid raft foundation unit (1), and the top surface of the rectangular pad (2) is inclined from four sides toward the center.

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