Anchor structure for steel plate of large steel structure base

Abstract

The present invention relates to an anchoring structure for a large steel structure base steel plate, and mainly to the technical field of connection between a large steel structure base steel plate and a concrete foundation. The top of a large-diameter steel rod is passed through a steel rod hole reserved at a corner of a steel plate with a relatively large thickness, and the steel rod and the steel plate are plug-welded. Shear stiffening ribs are arranged on the top of the steel rod, and anti-pull stiffening ribs are arranged on the bottom of the base steel plate. Large-diameter anchor bolts and steel shear keys are arranged around and in the middle of the base steel plate in accordance with the needs of the upper large steel structure. The diameter, length of the large-diameter steel rod and the anchor bolt, and the cross-sectional size of the steel shear key are determined according to the shear force, axial force and bending moment to be borne. The entire large embedded part is conducive to the connection and fixation of the large steel structure base steel plate and the concrete foundation. The advantages of the present invention are: simple production, clear force transmission, and appropriate cost.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to an anchoring structure of a large steel structure base steel plate. Background Art

[0002] Steel structure is a structure made of steel materials. It is one of the main types of building structures. It is mainly composed of beams, steel columns, steel trusses and other components made of steel sections and steel plates. Large and heavy power machines also use steel structures.

[0003] Traditional steel column anchoring generally adopts insertion, outsourcing or exposure. The exposed column foot anchor bolts generally do not bear horizontal shear force, which is borne by the friction between the bottom plate and the concrete foundation or the shear key. Some large steel structures generally adopt the exposed type due to process requirements.

[0004] The horizontal shear force at the bottom of large steel structures is very large, far greater than the friction between the steel structure bottom plate and the concrete foundation and the bearing capacity of the shear keys. Ensuring the anchoring performance of the steel structure bottom plate in the concrete foundation is an important issue to ensure the reliable operation of large steel structures.

[0005] Generally speaking, large steel structures are directly inserted because the internal forces they bear are too strong, and the exposed method is rarely used. Summary of the invention

[0006] The present invention designs an anchoring structure for a steel plate of a large steel structure base, which solves the technical problem that the horizontal shear force at the bottom of the large steel structure in the prior art is very large, far greater than the friction between the steel structure base plate and the concrete foundation and the bearing capacity of the shear key, and the anchoring performance of the steel structure base plate in the concrete foundation cannot be guaranteed.

[0007] In order to solve the above-mentioned technical problems, the present invention adopts the following solutions:

[0008] An anchoring structure for a large steel structure base steel plate, characterized in that it comprises a steel structure base steel plate (1), a large diameter steel rod (2), a large diameter anchor bolt (3) and a steel shear key (4); the steel structure base steel plate (1) is provided with a steel rod hole for the large diameter steel rod (2) to pass through and an anchor bolt hole for the large diameter anchor bolt (3) to pass through; the top of the large diameter steel rod (2) passes through the steel rod hole reserved for the large steel structure base steel plate (1) and is welded and fixed to the steel structure base steel plate (1); the top of the large diameter anchor bolt (3) passes through the anchor bolt hole reserved for the steel structure base steel plate (1) and is welded and fixed to the steel structure base steel plate (1). The steel shear key (4) is welded and fixed to the steel structure base steel plate (1).

[0009] Preferably, the large-diameter steel rod (2) is provided with a large-diameter steel rod top shear-resistant stiffening rib (21) and a large-diameter steel rod bottom anti-pullout stiffening rib (22).

[0010] Preferably, the large-diameter steel rod top shear stiffening rib (21) comprises a plurality of first vertical portions (211), a plurality of second vertical portions (212) and a first horizontal portion (213); the first vertical portion (211) and the second vertical portion (212) form a T-shaped structure, the vertical sides of the plurality of T-shaped structures are connected to the large-diameter steel rod (2), the large-diameter steel rod (2) is connected to the plurality of T-shaped structures, two adjacent T-shaped structures are connected via the first horizontal portion (213), and the first horizontal portion (213) is also fixedly connected to the large-diameter steel rod (2).

[0011] Preferably, the anti-pullout stiffening rib (22) at the bottom of the large-diameter steel rod comprises a plurality of third vertical portions (221) and a second horizontal portion (222); the plurality of third vertical portions (221) are connected to the large-diameter steel rod (2) and are evenly dispersed along the radial direction of the large-diameter steel rod (2); the second horizontal portion (222) is connected to the end of the large-diameter steel rod (2), and the bottom ends of the plurality of third vertical portions (221) are also fixedly connected to the second horizontal portion (222).

[0012] Preferably, the large-diameter anchor bolt (3) comprises an anti-displacement stiffening rib (31) in the middle of the large-diameter anchor bolt; the anti-displacement stiffening rib (31) in the middle of the large-diameter anchor bolt comprises a plurality of fourth vertical portions (311) and a third horizontal portion (312); the plurality of fourth vertical portions (311) are connected to the large-diameter anchor bolt (3) and are evenly dispersed along the radial direction of the large-diameter anchor bolt (3); the third horizontal portion (312) is passed through and connected by the large-diameter anchor bolt (3), and the bottom ends of the plurality of fourth vertical portions (311) are fixedly connected to the third horizontal portion (312);

[0013] Preferably, the large-diameter anchor bolt (3) further comprises an anti-displacement stiffening rib (32) at the bottom of the large-diameter anchor bolt, wherein the anti-displacement stiffening rib (32) at the bottom of the large-diameter anchor bolt comprises a plurality of fifth vertical portions (321) and a fourth horizontal portion (322), wherein the plurality of fifth vertical portions (321) are connected to the large-diameter anchor bolt (3) and are evenly dispersed along the radial direction of the large-diameter anchor bolt (3); the fourth horizontal portion (322) is connected to the end of the large-diameter anchor bolt (3), and the bottom ends of the plurality of fifth vertical portions (321) are also fixedly connected to the fourth horizontal portion (322).

[0014] Preferably, the steel rod hole is 2 mm larger in diameter than the large-diameter steel rod (2), and the opening is V-shaped; or / and, the anchor bolt hole is 2 mm larger in diameter than the large-diameter anchor bolt (3), and the opening is V-shaped.

[0015] Preferably, the longer the length of the large-diameter steel bar top shear stiffening rib (21) and the larger the thickness of the large-diameter steel bar bottom anti-pullout stiffening rib (22), the greater their ability to withstand shear force, axial force and bending moment. Conversely, the shorter the length of the large-diameter steel bar top shear stiffening rib (21) and the larger the thickness of the large-diameter steel bar bottom anti-pullout stiffening rib (22), the smaller their ability to withstand shear force, axial force and bending moment.

[0016] Preferably, the longer the length of the large-diameter anchor middle anti-pullout stiffening rib (31) and the larger the thickness of the large-diameter anchor bottom anti-pullout stiffening rib (32), the greater their ability to withstand shear force, axial force and bending moment. Conversely, the shorter the length of the large-diameter anchor middle anti-pullout stiffening rib (31) and the larger the thickness of the large-diameter anchor bottom anti-pullout stiffening rib (32), the smaller their ability to withstand shear force, axial force and bending moment.

[0017] Preferably, the cross-sectional size of the steel shear key (4) is determined according to the shear resistance of the column foot plate, and the buried depth is twice the cross-sectional height.

[0018] The anchoring structure of the large steel structure base steel plate has the following beneficial effects:

[0019] (1) The present invention utilizes the synergistic effect of large-diameter steel rod shear stiffeners, large-diameter anchor bolts and concrete to generate strong horizontal shear resistance.

[0020] (2) The anchoring structure of the steel plate of the large steel structure base of the present invention can be applied to ultra-large-span building structures with a small number of floors, bridges, large-scale power machinery foundations with very strong centrifugal force or disturbance force, and equipment foundations with very strong horizontal shear force.

[0021] (3) The advantages of the present invention are simple manufacturing, clear force transmission and appropriate cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : A three-dimensional schematic diagram of an anchoring structure embodiment 1 of a large steel structure base steel plate of the present invention;

[0023] Figure 2 : Figure 1 Schematic diagram of the structure of medium and large diameter steel bars;

[0024] Figure 3 : Figure 1 Schematic diagram of the structure of medium and large diameter anchor bolts;

[0025] Figure 4 : Figure 1 Schematic diagram of the structure of medium steel shear key;

[0026] Figure 5 : A three-dimensional schematic diagram of an anchoring structure embodiment 2 of a large steel structure base steel plate of the present invention

[0027] Description of reference numerals:

[0028] 1—steel structure base steel plate, 2—large diameter steel rod; 21—shear stiffening rib at the top of large diameter steel rod; 211—first vertical part; 212—second vertical part; 213—first horizontal part; 22—anti-pullout stiffening rib at the bottom of large diameter steel rod; 221—third vertical part; 222—second horizontal part; 3—large diameter anchor bolt; 31—anti-pullout stiffening rib in the middle of large diameter anchor bolt; 311—fourth vertical part; 312—third horizontal part; 32—anti-pullout stiffening rib at the bottom of large diameter anchor bolt; 321—fifth vertical part; 322—fourth horizontal part; 33—nut; 4—steel shear key. DETAILED DESCRIPTION

[0029] Combine the following Figures 1 to 5 , the present invention is further described:

[0030] Embodiment 1:

[0031] like Figure 1 As shown, the large steel structure base steel plate anchoring structure of the present invention comprises a steel structure base steel plate 1, a large diameter steel rod 2, a large diameter anchor bolt 3 and a steel shear key 4. The diameter of the large diameter anchor bolt is 56 mm, and the diameter of the large diameter steel rod is 200 mm. Generally speaking, the diameter of the large diameter anchor bolt is 56 mm-100 mm, and the diameter of the large diameter steel rod is more than 160 mm.

[0032] The steel structure base steel plate 1 is in the shape of a U-shaped steel sheet. Four large-diameter steel bars 2 are fixed on the four corners of the steel structure base steel plate 1 . A plurality of large-diameter anchor bolts 3 are fixed on the four sides of the steel structure base steel plate 1 .

[0033] The steel structure base steel plate 1 is reserved with steel rod holes for the large diameter steel rod 2 and anchor holes for the large diameter anchor bolts 3. The steel rod holes and anchor holes are machined by mechanical methods, and the minimum hole diameter is 2mm larger than the diameter of the large diameter steel rod and large diameter anchor bolt, and the opening is V-shaped.

[0034] The top of the large diameter steel rod 2 passes through the steel rod hole reserved in the large steel structure base steel plate 1 and is welded and fixed to the steel structure base steel plate 1. Specifically, the large diameter steel rod is welded and fixed to the steel structure base steel plate 1 through the shear stiffening rib 21 at the top.

[0035] The top of the large-diameter anchor bolt 3 passes through the anchor bolt hole reserved in the steel structure base steel plate 1 and is welded and fixed to the steel structure base steel plate 1 .

[0036] The steel shear key 4 is welded and fixed to the steel structure base steel plate 1 .

[0037] like Figure 2 As shown, the large diameter steel rod 2 is provided with a large diameter steel rod top shear stiffening rib 21 and a large diameter steel rod bottom anti-pull stiffening rib 22.

[0038] The shear stiffening rib 21 at the top of the large-diameter steel rod includes multiple first vertical parts 211, multiple second vertical parts 212 and a first horizontal part 213; the first vertical part 211 and the second vertical part 212 form a T-shaped structure, the vertical sides of the multiple T-shaped structures are connected to the large-diameter steel rod 2, the large-diameter steel rod 2 is connected to four T-shaped structures, and two adjacent T-shaped structures are connected by the first horizontal part 213, and the first horizontal part 213 is also fixedly connected to the large-diameter steel rod 2.

[0039] The anti-pushing stiffening rib 22 at the bottom of the large-diameter steel rod includes a plurality of third vertical portions 221 and a second horizontal portion 222 . Figure 2 There are 8 third vertical parts 221, which are connected to the large diameter steel rod 2 and are evenly distributed along the radial direction of the large diameter steel rod 2. The second horizontal part 222 is connected to the end of the large diameter steel rod 2, and the bottom ends of the plurality of third vertical parts 221 are also fixedly connected to the second horizontal part 222.

[0040] like Figure 3 As shown, the large diameter anchor bolt 3 comprises a large diameter anchor bolt middle anti-displacement stiffening rib 31 and a large diameter anchor bolt bottom anti-displacement stiffening rib 32 .

[0041] The middle anti-extrusion stiffening rib 31 of the large-diameter anchor bolt includes a plurality of fourth vertical portions 311 and a third horizontal portion 312. The plurality of fourth vertical portions 311 are connected to the large-diameter anchor bolt 3 and are evenly dispersed along the radial direction of the large-diameter anchor bolt 3. The third horizontal portion 312 is passed through and connected by the large-diameter anchor bolt 3, and the bottom ends of the plurality of fourth vertical portions 311 are fixedly connected to the third horizontal portion 312. Whether the large-diameter anchor bolt 3 is provided with the middle anti-extrusion stiffening 31 is determined according to the shear force, axial force and bending moment borne and the anchoring embedment depth limit requirements.

[0042] The anti-pushing stiffening rib 32 at the bottom of the large-diameter anchor bolt includes a plurality of fifth vertical portions 321 and a fourth horizontal portion 322. The plurality of fifth vertical portions 321 are connected to the large-diameter anchor bolt 3 and are uniformly dispersed along the radial direction of the large-diameter anchor bolt 3. The fourth horizontal portion 322 is connected to the end of the large-diameter anchor bolt 3, and the bottom ends of the plurality of fifth vertical portions 321 are also fixedly connected to the fourth horizontal portion 322.

[0043] A thread and a nut 33 are provided at one end of the large diameter anchor bolt 3 .

[0044] like Figure 4 As shown, the cross section of the steel shear key 4 is an I-shape.

[0045] Embodiment 2:

[0046] like Figure 5 As shown, the large-scale steel structure base steel plate anchoring structure of the present invention includes a steel structure base steel plate 1, a large-diameter steel rod 2 and a large-diameter anchor bolt 3.

[0047] The large diameter steel rod 2 comprises a shear stiffening rib 21 at the top of the large diameter steel rod and a pull-out stiffening rib 22 at the bottom of the large diameter steel rod.

[0048] The large diameter anchor bolt 3 comprises an anti-pushing stiffening rib 32 at the bottom of the large diameter anchor bolt.

[0049] The large steel structure base steel plate 1 is reserved with steel rod holes and anchor bolt holes, which are processed mechanically, and the minimum hole diameter is 2 mm larger than the diameter of the large diameter steel rod and large diameter anchor bolt, and the opening is V-shaped.

[0050] The top of the large-diameter steel rod 2 passes through the steel rod hole reserved in the large-scale steel structure base steel plate 1 and is welded and fixed to the base steel plate 1 .

[0051] The shear-resistant stiffening rib 21 on the top of the large-diameter steel rod is welded and fixed to the base steel plate 1 .

[0052] The top of the large-diameter anchor bolt 3 passes through the anchor bolt hole reserved in the large-scale steel structure base steel plate 1 and is welded and fixed to the base steel plate 1 .

[0053] The difference between Example 2 and Example 1 is that: the steel structure base steel plate 1 in Example 1 has an opening structure in the middle, while the steel structure base steel plate 1 in Example 2 has no opening structure and is a complete steel plate. The four large-diameter steel bars 2 in Example 2 are fixed to the four corners of the steel structure base steel plate 1, and a plurality of large-diameter anchor bolts 3 are evenly distributed in the quadrilateral defined by the four large-diameter steel bars 2.

[0054] It can be seen that the anchoring structure of the steel plate of the large steel structure base of the present invention utilizes the synergistic effect of the large diameter steel bar shear stiffening ribs, the large diameter anchor bolts and the concrete to generate a strong horizontal shear resistance. Under the premise of ensuring the anchoring strength, the large diameter steel bar, the large diameter steel bar top shear stiffening ribs, the large diameter steel bar bottom anti-pull stiffening ribs, the large diameter anchor bolts, the large diameter anchor bolt middle anti-pull stiffening ribs, the large diameter anchor bolt bottom anti-pull stiffening ribs, and the steel shear key can be flexibly arranged to form an overall stable system to ensure the connection and fixation of the large steel structure base steel plate and the concrete foundation.

[0055] The working principle of the present invention is as follows: the large-diameter steel rod 2 bears most of the horizontal shear force at the bottom of the large steel structure, and the horizontal shear force borne by the large-diameter steel rod 2 is quickly offset by the concrete foundation through the top shear stiffening rib 21; the large-diameter anchor bolt 3 also bears a considerable proportion of the horizontal shear force at the bottom of the large steel structure through the synergistic effect with the concrete foundation; on the contrary, the friction force between the steel shear key 4, the steel structure base steel plate 1 and the concrete foundation bears a small proportion of the horizontal shear force at the bottom of the large steel structure.

[0056] It is worth mentioning that the present invention designs an anchoring structure for a large steel structure base steel plate. The steel structure base steel plate is used in large and heavy power machinery platforms and construction platforms. It has a large thickness and is not a thin steel plate in the general sense. It has very high requirements for bearing horizontal shear forces.

[0057] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An anchoring structure for a large steel structure base steel plate, characterized in that: The invention comprises a steel structure base steel plate (1), a large diameter steel rod (2), a large diameter anchor bolt (3) and a steel section shear key (4); the steel structure base steel plate (1) is provided with a steel rod hole for the large diameter steel rod (2) to pass through and an anchor bolt hole for the large diameter anchor bolt (3) to pass through; the top of the large diameter steel rod (2) passes through the steel rod hole reserved in the large steel structure base steel plate (1) and is welded and fixed to the steel structure base steel plate (1); four large diameter steel rods (2) are fixed to the four corners of the steel structure base steel plate (1); the top of the large diameter anchor bolt (3) passes through the anchor bolt hole reserved in the steel structure base steel plate (1) and is welded and fixed to the steel structure base steel plate (1); the steel section shear key (4) is connected to the steel structure base steel plate (1) The large diameter steel rod (2) is welded and fixed; the large diameter steel rod (2) is provided with a large diameter steel rod top shear stiffening rib (21) and a large diameter steel rod bottom anti-pullout stiffening rib (22); the large diameter steel rod top shear stiffening rib (21) includes a plurality of first vertical portions (211), a plurality of second vertical portions (212) and a first horizontal portion (213); the first vertical portion (211) and the second vertical portion (212) form a T-shaped structure, the vertical sides of the plurality of T-shaped structures are connected to the large diameter steel rod (2), the large diameter steel rod (2) is connected to the plurality of T-shaped structures, two adjacent T-shaped structures are connected via a first horizontal portion (213), and the first horizontal portion (213) is also fixedly connected to the large diameter steel rod (2); the large diameter steel rod bottom anti-pullout stiffening rib (21) includes a plurality of first vertical portions (211), a plurality of second vertical portions (212) and a first horizontal portion (213); the first vertical portion (211) and the second vertical portion (212) form a T-shaped structure, the vertical sides of the plurality of T-shaped structures are connected to the large diameter steel rod (2), the large diameter steel rod (2) is connected to the plurality of T-shaped structures, and two adjacent T-shaped structures are connected via a first horizontal portion (213), and the first horizontal portion (213) is also fixedly connected to the large diameter steel rod (2); the large diameter steel rod bottom anti-pullout stiffening rib (21) includes a plurality of first vertical portions (211), a plurality of second vertical portions (212) and a first horizontal portion (213); The rib (22) comprises a plurality of third vertical portions (221) and a second horizontal portion (222); the plurality of third vertical portions (221) are connected to the large diameter steel rod (2) and are uniformly dispersed along the radial direction of the large diameter steel rod (2); the second horizontal portion (222) is connected to the end of the large diameter steel rod (2), and the bottom ends of the plurality of third vertical portions (221) are also fixedly connected to the second horizontal portion (222); the large diameter anchor bolt (3) comprises a large diameter anchor bolt middle anti-displacement stiffening rib (31); the large diameter anchor bolt middle anti-displacement stiffening rib (31) comprises a plurality of fourth vertical portions (311) and a third horizontal portion (312); the plurality of fourth vertical portions (311) are connected to the large diameter anchor bolt (3) and are uniformly dispersed along the radial direction of the large diameter anchor bolt (3) radially uniformly dispersed; the third horizontal portion (312) is penetrated and connected by the large-diameter anchor bolt (3), and the bottom ends of the plurality of fourth vertical portions (311) are fixedly connected to the third horizontal portion (312); the large-diameter anchor bolt (3) further comprises a large-diameter anchor bolt bottom anti-displacement stiffening rib (32), and the large-diameter anchor bolt bottom anti-displacement stiffening rib (32) comprises a plurality of fifth vertical portions (321) and a fourth horizontal portion (322), the plurality of fifth vertical portions (321) are connected to the large-diameter anchor bolt (3) and are uniformly dispersed radially along the large-diameter anchor bolt (3); the fourth horizontal portion (322) is connected to the end of the large-diameter anchor bolt (3), and the bottom ends of the plurality of fifth vertical portions (321) are also fixedly connected to the fourth horizontal portion (322).

2. The anchoring structure of the large steel structure base steel plate according to claim 1 is characterized in that: The steel rod hole is 2 mm larger in diameter than the large-diameter steel rod (2), and the opening is V-shaped; the anchor bolt hole is 2 mm larger in diameter than the large-diameter anchor bolt (3), and the opening is V-shaped.

3. The anchoring structure of the large steel structure base steel plate according to claim 2 is characterized in that: The longer the length of the large-diameter steel bar top shear stiffening rib (21) and the larger the thickness of the large-diameter steel bar bottom anti-pullout stiffening rib (22), the greater their ability to withstand shear force, axial force and bending moment. Conversely, the shorter the length of the large-diameter steel bar top shear stiffening rib (21) and the smaller the thickness of the large-diameter steel bar bottom anti-pullout stiffening rib (22), the smaller their ability to withstand shear force, axial force and bending moment.

4. The anchoring structure of the large steel structure base steel plate according to claim 3 is characterized in that: The longer the length of the large-diameter anchor middle anti-pullout stiffening rib (31) and the larger the thickness of the large-diameter anchor bottom anti-pullout stiffening rib (32), the greater the shear force, axial force and bending moment they can withstand. Conversely, the shorter the length of the large-diameter anchor middle anti-pullout stiffening rib (31) and the larger the thickness of the large-diameter anchor bottom anti-pullout stiffening rib (32), the smaller the shear force, axial force and bending moment they can withstand.

5. The anchoring structure of the large steel structure base steel plate according to any one of claims 1 to 4, characterized in that: The cross-sectional size of the steel shear key (4) is determined according to the shear resistance of the column foot bottom plate, and the buried depth is twice the cross-sectional height.

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