Steel concrete foundation

Abstract

To provide a steel concrete foundation capable of ensuring the verticality and / or height of a steel foundation column member while improving rigidity against lateral forces.SOLUTION: A steel concrete foundation of the present invention comprises a steel foundation column member supported on the ground, a maintenance mechanism interposed between the steel foundation column member and the ground and configured to maintain the steel foundation column member at a predetermined verticality and / or height, a steel foundation beam member attached to the steel foundation column member, and foundation concrete covering the surroundings of the steel foundation beam member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a steel-concrete foundation.

Background Art

[0002] For example, a technique is known in which a steel foundation beam member is installed on the ground and a steel foundation column member is pin-connected on the steel foundation beam member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to improve the rigidity against lateral forces, the inventors considered placing a steel foundation column member on the ground. However, due to unevenness of the ground, etc., it was difficult to ensure the verticality and / or height of the steel foundation column member, and thus the verticality and / or height of the upper column integrally extending or joined by rigid connection to the upper part of the steel foundation column member.

[0005] Therefore, an object of the present invention is to provide a steel-concrete foundation capable of ensuring the verticality and / or height of a steel foundation column member while improving the rigidity against lateral forces.

Means for Solving the Problems

[0006] The steel-concrete foundation according to the first aspect of the present invention is (1) a steel foundation column member supported by the ground, and a maintenance mechanism interposed between the steel foundation column member and the ground to maintain the steel foundation column member at a predetermined verticality and / or height, A steel frame foundation beam member attached to the steel frame foundation column member, and foundation concrete covering the periphery of the steel frame foundation beam member, comprising a steel frame concrete foundation.

[0007] A steel frame concrete foundation as one embodiment of the present invention, (2) The maintaining mechanism, comprises a base plate placed on the ground at a position vertically below the steel frame foundation column member, and an adjusting body capable of adjusting the vertical distance between the base plate and the steel frame foundation column member on the base plate, being the steel frame concrete foundation according to (1) above.

[0008] A steel frame concrete foundation as one embodiment of the present invention, (3) The steel frame foundation column member is provided with a plate-shaped flange portion at its lower end, the plate-shaped flange portion has a plurality of screw holes penetrating in the vertical direction and having female screw portions formed on the inner surface, the adjusting body of the vertical maintaining mechanism is a bolt body having a male screw portion formed on the outer surface, penetrating the screw hole, and one end abutting against the base plate, by adjusting the screwing state between the male screw portion of the bolt body and the female screw portion of the screw hole of the plate-shaped flange portion of the steel frame foundation column member, the vertical distance between the base plate and the steel frame foundation column member can be adjusted at a plurality of locations on the base plate, being the steel frame concrete foundation according to (1) or (2) above.

[0009] A steel frame concrete foundation as one embodiment of the present invention, (4) The steel frame foundation beam member is in surface contact and fixed to the side surface of the steel frame foundation column member, being the steel frame concrete foundation according to any one of (1) to (3) above.

[0010] A steel frame concrete foundation as one embodiment of the present invention, (5) The steel frame foundation column member includes an extended portion that extends vertically upward from the upper surface of the steel frame foundation beam member. The steel frame concrete foundation according to any one of (1) to (4) above, wherein the periphery of the extended portion is exposed without being covered by the foundation concrete.

[0011] A steel frame concrete foundation as one embodiment of the present invention is (6) The steel frame concrete foundation according to any one of (1) to (5) above, wherein at least a part of the upper end portion of the steel frame foundation beam member is exposed without being covered by the foundation concrete.

Effect of the Invention

[0012] According to the present invention, it is possible to provide a steel frame concrete foundation that can ensure the verticality and / or height of the steel frame foundation column member while improving the rigidity against lateral forces.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

[0014] Hereinafter, embodiments of a steel reinforced concrete foundation according to the present invention will be exemplified and described with reference to the drawings. The same reference numerals are given to the common configurations in each figure.

[0015] FIGS. 1 and 2 show a steel reinforced concrete foundation 100 as a first embodiment of a steel reinforced concrete foundation according to the present invention. The steel reinforced concrete foundation 100 includes a steel reinforced foundation column member 10, a maintenance mechanism 20, a steel reinforced foundation beam member 30, and a foundation concrete 40.

[0016] As shown in FIGS. 1 and 2, a groove 200g is excavated in the ground 200. As shown in FIG. 2, the groove 200g may be located directly below and around the steel reinforced foundation beam member 30 in the vertical direction. A hole 200h deeper than the groove 200g may be excavated directly below and around the steel reinforced foundation column member 10 in the vertical direction. The hole 200h may be rectangular parallelepiped.

[0017] As shown in FIG. 1, a pile 300 may be driven into the hole 200h in the ground 200. A flange portion 300f is formed at the upper end of the pile 300. The flange portion 300f is disposed below the ground surface GL. Instead of the pile 300, other pile-like ground reinforcements may be provided.

[0018] The waste concrete layer 400 may cover the flange portion 300f of the pile 300, the upper surface of the hole 200h, and the upper surface of the groove 200g.

[0019] The maintaining mechanism 20 is interposed between the steel frame foundation column member 10 and the ground 200, and maintains the steel frame foundation column member 10 at a predetermined verticality and / or height. The steel frame foundation column member 10 is supported by the ground 200 via the maintaining mechanism 20.

[0020] Specifically, the base plate 21 of the maintaining mechanism 20 may be placed on the ground 200 at a position vertically below the steel frame foundation column member 10. The base plate 21 may be placed on the upper surface of the discarded concrete layer 400 of the hole 200h. One end (lower end) of the bolt body 22 as the adjusting body provided in the maintaining mechanism 20 may be in contact with the base plate 21.

[0021] The base plate 21 may be square when viewed from the extending direction of the steel frame foundation column member 10. Each edge of the base plate 21 may be parallel to the opposing side surface of the hole 200h. Each edge of the base plate 21 may have an angle of 45° with respect to each of the adjacent side surfaces in the hole 200h when viewed from the extending direction of the steel frame foundation column member 10.

[0022] The bolt body 22 may be able to adjust the vertical distance between the base plate 21 and the steel frame foundation column member 10 at the base plate 21. Specifically, the bolt body 22 may have a male thread portion formed on the outer surface. The plate-like flange portion 11 described later may have a plurality of threaded holes that penetrate vertically and have female thread portions formed on the inner surfaces. The bolt body 22 may penetrate the threaded holes of the plate-like flange portion 11. By adjusting the screwing state between the male thread portion of the bolt body 22 and the female thread portion of the threaded hole of the plate-like flange portion 11 of the steel frame foundation column member 10, the vertical distances d1, d2, and d3 between the base plate 21 and the steel frame foundation column member 10 may be independently adjustable at a plurality of locations on the base plate 21. By adjusting the screwing state between the male thread portion of the bolt body 22 and the female thread portion of the threaded hole of the plate-like flange portion 11 of the steel frame foundation column member 10, the inclination of the plate-like flange portion 11 with respect to the base plate 21 may be adjustable.

[0023] More specifically, by rotating the bolt body 22 in one direction to separate the lower end portion of the bolt body 22 from the plate-shaped flange portion 11, the vicinity of the threaded hole through which the bolt body 22 penetrates in the plate-shaped flange portion 11 may approach the base plate 21. By rotating the bolt body 22 in the reverse direction to bring the lower end portion of the bolt body 22 closer to the plate-shaped flange portion 11, the vicinity of the threaded hole may be separated from the base plate 21.

[0024] The maintaining mechanism 20 may include a plurality of bolt bodies 22. By some of the bolt bodies 22 approaching or separating the vicinity of the through threaded hole in the plate-shaped flange portion 11 with respect to the base plate 21, the inclination of the plate-shaped flange portion 11 with respect to the base plate 21 may be adjustable.

[0025] There may be unevenness in the ground 200. In such a case, the horizontality of the base plate 21 may not be ensured. Even in this case, by providing the maintaining mechanism 20 with a plurality of bolt bodies 22, the straightness of the steel frame foundation column member 10 can be ensured.

[0026] As shown in FIGS. 1 and 2, the bolt body 22 may be inserted into the bolt hole from above the plate-shaped flange portion 11. Some or all of the bolt bodies may be full-thread bolt bodies, the full-thread bolt bodies may be inserted into the bolt holes, and nuts may be attached to the full-thread bolt bodies from above and below the plate-shaped flange portion 11.

[0027] The maintaining mechanism may be realized by other structures such as a jack.

[0028] The steel frame foundation column member 10 may be a cylinder with a square cross-section. Note that the cross-section of the steel frame foundation column member 10 may be of other shapes. The steel frame foundation column member 10 may be solid. The height of the steel frame foundation column member 10 may be half of the distance d (see FIG. 1) between the steel frame foundation beam member 30 and the second floor beam 500. The side surface of the steel frame foundation column member 10 may be parallel to the opposing side surface of the hole 200h in the ground 200.

[0029] The steel frame foundation column member 10 may be arranged vertically above the base plate 21. A plate-shaped flange portion 11 may be formed at the lower end portion of the steel frame foundation column member 10. The plate-shaped flange portion 11 may be square when viewed from the extending direction of the steel frame foundation column member 10. The screw holes of the plate-shaped flange portion 11 may be formed near the corners of the plate-shaped flange portion 11. A female screw portion may be formed on the inner surface of the screw hole.

[0030] The steel frame foundation beam member 30 is attached to the steel frame foundation column member 10. With this configuration, the rigidity against lateral forces can be improved. The steel frame foundation beam member 30 may be fixed in surface contact with the side surface of the steel frame foundation column member 10. More specifically, the end plate on the end surface of the steel frame foundation beam member 30 may be fixed by bolts 30b in a state of being in surface contact (butting) with the side surfaces of two adjacent steel frame foundation column members 10. The maintenance mechanism 20 can ensure a high verticality of the steel frame foundation column member 10 required for the surface contact.

[0031] In FIG. 2, three steel frame foundation beam members 30 extend in the horizontal direction from the steel frame foundation column member 10, but one, two, or four or more steel frame foundation beam members 30 may extend from the steel frame foundation column member 10 in other directions.

[0032] The steel frame foundation beam member 30 may be composed of H-shaped steel. Bolt holes 30h may be formed in each of the flanges 30f1, 30f2 and the web 30w of the steel frame foundation beam member 30. An opening 30о may be formed in the web 30w of the steel frame foundation beam member 30.

[0033] As shown in FIG. 3, the foundation concrete 40 covers the periphery of the steel frame foundation beam member 30. The foundation concrete 40 may be plain concrete. The foundation concrete 40 covers the upper and lower surfaces of the web 30w and the lower flange 30f2 of the steel frame foundation beam member 30, respectively. The foundation concrete 40 may cover the lower surface of the upper flange 30f1 of the steel frame foundation beam member 30. In other words, at least a part of the upper end portion of the steel frame foundation beam member 30 (for example, the upper surface of the upper flange 30f1) may be exposed without being covered by the foundation concrete 40. Through the bolt holes 30h of the upper flange 30f1, the steel frame foundation beam member 30 may be connected to the floor slab, wall, etc. By covering the periphery of the steel frame foundation beam member 30 with the foundation concrete 40, it is possible to prevent a decrease in the flexural strength due to lateral buckling of the steel frame foundation beam member 30.

[0034] The foundation concrete 40 may cover the periphery of the steel frame foundation column member 10 below the steel frame foundation beam member 30.

[0035] The foundation concrete 40 may extend along the steel frame foundation beam member 30. The foundation concrete 40 may be supported by the ground 200.

[0036] As shown in FIGS. 2 and 3, the steel frame foundation column member 10 may include an extended portion (upper column) 10e that extends vertically upward from the upper surface 30u of the steel frame foundation beam member 30. The periphery of the extended portion 10e may be exposed without being covered by the foundation concrete 40. The extended portion 10e may extend integrally with the upper part of the steel frame foundation column member 10. The extended portion may be an upper column that is rigidly joined to the upper part of the foundation column of the steel frame foundation column member 10.

[0037] As shown in FIG. 8, the second-floor beam 500 may be attached to the upper column 10e. Specifically, the end plate of the built-in steel frame of the second-floor beam 500 may be fixed by bolts in a state of being in surface contact with the side surface of the adjacent upper column 10e. In the steel frame foundation column member 10, the second-floor beam 500 may be in surface contact with a side surface different from the side surface where the steel frame foundation beam member 30 is in surface contact.

[0038] Next, with reference to FIGS. 4 to 8, an example of a method for constructing the steel frame concrete foundation 100 will be described.

[0039] (Step 1) As shown in FIG. 4, a groove 200g is excavated in the ground 200. As shown in FIG. 2, the groove 200g may be located directly below and around the vertical direction of the steel frame foundation beam member 30. A hole 200h deeper than the groove 200g is excavated directly below and around the vertical direction of the steel frame foundation column member 10.

[0040] As shown in FIG. 2, a pile 300 is driven into the hole 200h of the ground 200. Instead of the pile 300, other pile-like ground reinforcements may be provided.

[0041] A disposable concrete layer 400 is provided to cover the flange portion 300f of the pile 300, the upper surface of the hole 200h, and the upper surface of the groove 200g. Marking may be performed on the disposable concrete layer 400.

[0042] (Step 2) As shown in FIG. 5, the base plate 21 of the maintaining mechanism 20 is placed on the upper surface of the disposable concrete layer 400 of the hole 200h. The bolt body 22 is inserted into the bolt hole from above the plate-shaped flange portion 11 of the foundation column 10b of the steel frame foundation column member 10. The foundation column 10b is moved so that the bolt body 22 abuts against the upper surface of the base plate 21.

[0043] The vertical distance between the base plate 21 and the foundation column 10b is adjusted by the bolt body 22. Specifically, by rotating the bolt body 22, the vicinity of the screw hole through which the bolt body 22 penetrates in the plate-shaped flange portion 11 approaches or separates from the base plate 21. By this adjustment, the verticality and / or height of the steel frame foundation column member can be ensured.

[0044] (Step 3) As shown in FIG. 6, a steel foundation beam member 30 is attached to the foundation column 10b. Specifically, the end plate of the built-in steel frame of the steel foundation beam member 30 is in surface contact with the side surface of the adjacent foundation column 10b and is fixed by bolts 30b. The foundation column 10b and the steel foundation beam member 30 define the structural surface of the foundation.

[0045] (Step 4) As shown in FIG. 7, an upper column 10e as an extension part is joined to the upper part of the foundation column 10b by rigid connection.

[0046] Foundation concrete 40 is coated around the steel foundation beam member 30. Specifically, a formwork surrounding the steel foundation beam member 30 is provided. Then, concrete is filled into the formwork so as to cover the steel foundation beam member 30. Thereafter, the concrete solidifies. This step may be performed after Step 5.

[0047] (Step 5) As shown in FIG. 8, a second-floor beam 500 is attached to the upper column 10e. Specifically, the built-in steel frame of the second-floor beam 500 is in surface contact with the side surface of the adjacent upper column 10e and is fixed by bolts.

Explanation of Reference Numerals

[0048] 100: Steel Reinforced Concrete Foundation 10: Steel Foundation Column Member 10b: Foundation Column 10e: Extension Part 11: Plate-shaped Flange Part 20: Maintenance Mechanism 21: Base Plate 22: Bolt Body 30: Steel Foundation Beam Member 30: Opening 30b: Bolt 30f1: Upper Flange 30f2: Lower Flange 30h: Bolt Hole 30u: Upper Surface 30w: Web 40: Foundation Concrete 200: Ground 200g: Groove 200h: Bolt hole 300: Pile 300f: Flange part 400: Concrete layer 500: Second - floor beam GL: Ground surface d: Distance between the steel - frame foundation beam member and the second - floor beam d1, d2, d3: Vertical distance between the base plate and the steel - frame foundation column member

Claims

1. A steel frame foundation column member supported by the ground, a maintenance mechanism interposed between the steel frame foundation column member and the ground to maintain the steel frame foundation column member at a predetermined verticality and / or height, a steel frame foundation beam member attached to the steel frame foundation column member, and a foundation concrete covering the periphery of the steel frame foundation beam member. A steel frame concrete foundation comprising the above.

2. The maintenance mechanism is, a base plate placed on the ground at a position vertically below the steel frame foundation column member, and an adjusting body capable of adjusting the vertical distance between the base plate and the steel frame foundation column member on the base plate. The steel frame concrete foundation according to Claim 1, comprising the above.

3. The steel frame foundation column member has a plate-shaped flange portion at the lower end, the plate-shaped flange portion has a plurality of screw holes penetrating in the vertical direction and having female screw portions formed on the inner surface, the adjusting body of the vertical maintenance mechanism is a bolt body having a male screw portion formed on the outer surface, penetrating the screw hole, and one end abutting against the base plate, and by adjusting the screwing state between the male screw portion of the bolt body and the female screw portion of the screw hole of the plate-shaped flange portion of the steel frame foundation column member, the vertical distance between the base plate and the steel frame foundation column member can be adjusted at a plurality of locations on the base plate. The steel frame concrete foundation according to Claim 2.

4. The steel frame foundation beam member is fixedly in surface contact with the side surface of the steel frame foundation column member. The steel frame concrete foundation according to any one of Claims 1 to 3.

5. The steel frame foundation column member has an extended portion extending vertically upward from the upper surface of the steel frame foundation beam member, and the periphery of the extended portion is exposed without being covered by the foundation concrete. The steel frame concrete foundation according to any one of Claims 1 to 3.

6. At least a part of the upper end portion of the steel frame foundation beam member is exposed without being covered by the foundation concrete. The steel frame concrete foundation according to any one of Claims 1 to 3.

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