Civil Engineering Unit

Abstract

To provide a civil engineering unit that can improve strength in the vertical direction. [Solution] A civil engineering unit having a pair of legged bases and a support column, wherein the legged base has a base portion, one or more hollow outer cylinders with an open bottom protruding upward from the base portion, and one or more hollow inner cylinders with an open top and a closed bottom protruding downward from the top surface of each of the one or more outer cylinders, an internal cavity formed inside the inner cylinder, an intermediate cavity formed between the outer cylinder and the inner cylinder, the pair of legged bases are arranged with the outer cylinders facing each other, and the support column is inserted into the internal cavity.

Description

Technical Field

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[0001] The present invention relates to a civil engineering unit, and particularly to a civil engineering unit used for constructing an underground buried civil engineering structure (frame structure / void structure).

Background Art

[0002] There is known a water storage tank in which a civil engineering structure formed by stacking a large number of blocks (pedestals) with a high void ratio is installed in a depression and filled with soil to form a rainwater storage space (for example, Patent Document 1). The civil engineering structure can also be used for forming a dam structure, an embankment, etc.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] The pedestals constituting the conventional civil engineering structure were made of plastic (for example, Patent Documents 2 and 3). Therefore, there was a problem that the strength in the vertical direction was low and it deformed due to soil pressure from above. An object of the present invention is to provide a civil engineering unit capable of improving the strength in the vertical direction.

Means for Solving the Problems

[0005] This application includes a civil engineering unit having a pair of pedestals and a column, where the pedestal is a base portion, one or more hollow outer cylinders with an open bottom protruding upward from the base portion, Each of the one or more outer cylinders has a hollow inner cylinder that is open at the top and closed at the bottom, projecting downwards from the top surface. It has, An internal cavity is formed inside the inner cylinder. An intermediate space is formed between the outer cylinder and the inner cylinder. The pair of legged bases are arranged facing each other, A civil engineering unit is disclosed in which the support column is inserted into the internal cavity. [Brief explanation of the drawing]

[0006] [Figure 1] This shows a water storage tank 3 using a civil engineering structure 1 according to one embodiment of the present invention. [Figure 2] A cross-sectional view of civil engineering structure 1 using civil engineering unit 6 is shown. [Figure 3] Civil engineering unit 6 is shown in a cross-sectional view. [Figure 4] The legged base 10 is shown. (a) is a plan view. (b) is a cross-sectional view. (c) is a perspective view. (d) is a bottom view. [Figure 5] A modified version of civil engineering unit 6 is shown. [Modes for carrying out the invention]

[0007] Figure 1 shows a water storage tank 3 using a civil engineering structure 1 according to one embodiment of the present invention. By installing the civil engineering structure 1 in a depression 2 covered with a waterproof sheet and backfilling it with soil, a water storage tank 3 capable of storing rainwater can be formed. The area above the water storage tank 3 can be used as a parking lot, road, park, etc. The civil engineering structure 1 may also be installed under a road surface or under a house to be used as an embankment, or it may be installed at the bottom of a dam to form a dam structure. Side walls 4 and a ceiling 5 may be provided on the sides or top of the civil engineering structure 1.

[0008] Figure 2 shows a civil engineering structure 1 using a base (block) 10 and a support column 20. The civil engineering structure 1 has multiple civil engineering units 6 arranged in a horizontal plane.

[0009] Figure 3 shows a cross-sectional view of the civil engineering unit 6. As shown in the figure, the civil engineering unit 6 has a pair of leg bases 10 and a support column 20. The pair of leg bases 10 are arranged facing each other vertically with the upper surfaces 13a of the outer cylinders 13 of the leg bases 10 facing each other. The support column 20 is inserted between the pair of leg bases 10.

[0010] As shown in the diagram, it is preferable that the pair of leg-supported bases 10 be spaced apart by a multiple of the height of the leg-supported bases 10. In the example shown in the diagram, the pair of leg-supported bases 10 are spaced apart by the height of two leg-supported bases 10.

[0011] Figure 4 shows the legged base 10 used in the civil engineering unit 6. If the legged base 10 is made of plastic, it will be lighter, which is advantageous as it will make stacking work easier.

[0012] As shown in the figure, the legged base 10 has a base portion 11 and leg portions 12 (Figure 4(a)). The leg portions 12 have a double structure consisting of an outer cylinder 13 and an inner cylinder 14. In the example shown in the figure, there are four leg portions 12 (outer cylinder 13). Therefore, there are four support columns 20 per civil engineering unit 6.

[0013] The leg portion 12 in this example has a hollow outer cylinder 13 that is open at the bottom and closed at the top, projecting upward from the base portion 11 (Figure 4(b)). It also has a hollow inner cylinder 14 that is open at the top and closed at the bottom, projecting downward from the top surface of the outer cylinder 13. The outside of the outer cylinder 13 may be a cylindrical shape with a constant cross-sectional area in the height direction, but it may also be a frustoconical shape that tapers upward as shown in the figure.

[0014] In this example, an internal cavity 15 is formed inside the inner cylinder 14 (Figures 4(a)-(c)). Also, an intermediate cavity 16 is formed between the outer cylinder 13 and the inner cylinder 14 (Figures 4(b),(d)).

[0015] As shown in Fig. 2-4, the support column (pipe) 20 is inserted into the inner cavity 15 of the pedestal 10 with legs. Thereby, the support column 20 is stabilized. Further, since the intermediate cavity 16 is formed, even if the support column 20 swings in the horizontal direction, only the inner cylinder 14 swings a little. Therefore, the civil engineering unit 6 has high horizontal strength. The support column 20 is preferably made of vinyl chloride in terms of easy availability in the market and light weight. It may also be made of steel or concrete.

[0016] The civil engineering unit 6 of the above embodiment can be constructed by manual arrangement / stacking. By inserting the support column 20 into the inner cavity 15, the vertical strength of the civil engineering unit 6 is improved. The creep resistance can also be improved. Since the support column 20 is easily available in the market as a ready-made product, the cost of the civil engineering unit 6 can be reduced.

[0017] The civil engineering unit 6 described in the above embodiment, or the dimensions, shapes, arrangements, numbers, etc. of these elements are examples, and other aspects are also possible.

[0018] Fig. 5 shows a modified example of the civil engineering unit 6. As shown in the figure, the distance between the pair of pedestals 10 with legs and the length of the support column 20 may be changed.

Explanation of Reference Numerals

[0019] 1 ··· Civil engineering structure 2 ··· Depression 3 ··· Water storage tank 4 ··· Side wall 5 ··· Ceiling 6 ··· Civil engineering unit 10 ··· Pedestal with legs 11 ··· Base part 12 ··· Leg part 13 ··· Outer cylinder 13a ··· Upper surface 14 ··· Inner cylinder 15 ··· Inner cavity 16 ··· Intermediate cavity 20 ··· Support column

Claims

1. A civil engineering unit having a pair of legs and a support column, The aforementioned legged base, The base and, One or more hollow outer cylinders with open bottoms protruding upward from the base portion, Each of the one or more outer cylinders has a hollow inner cylinder that is open at the top and closed at the bottom, projecting downwards from the top surface. It has, An internal cavity is formed inside the inner cylinder. An intermediate space is formed between the outer cylinder and the inner cylinder. The pair of legged bases are arranged facing each other, A civil engineering unit in which the support column is inserted into the aforementioned internal cavity.

2. The civil engineering unit according to claim 1, wherein the pair of leg-supported bases are spaced apart by a multiple of the height of the leg-supported bases.

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