Civil engineering structure

Abstract

To provide a civil engineering structure capable of improving vertical strength.SOLUTION: This civil engineering structure has a pair of footboards formed by stacking two footboards having a base part and a leg part so that the leg parts face each other, and a column arranged in the leg part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to civil engineering structures. [Background technology]

[0002] A water tank is known in which a civil engineering structure (framework structure / porous structure) made of a large number of stacked high-porosity blocks (pedestals) is placed in a depression and backfilled with soil to form a rainwater storage space (see, for example, Patent Document 1). Civil engineering structures can also be used to form dam structures, embankments, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-211316 [Patent Document 2] Japanese Patent Application Publication No. 11-222886 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-280775 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional civil engineering structures have had bases with legs made of plastic (see, for example, Patent Documents 2 and 3). This resulted in low vertical strength and the problem of deformation due to soil pressure from above. The present invention aims to provide a civil engineering structure that can improve vertical strength. [Means for solving the problem]

[0005] In this application, a pair of legged stands, each having a base and legs, stacked one on top of the other with the legs facing each other; A civil engineering structure is disclosed having a column disposed within the leg. [Brief explanation of the drawings]

[0006] [Figure 1] 1 shows a water tank 3 using a civil engineering structure 1 according to an embodiment of the present invention. [Figure 2] A side view of a civil engineering structure 1 is shown. [Figure 3] 1 shows a legged stand 10, in which (a) is a perspective view and (b) is a cross-sectional view. [Figure 4] 1 shows a support 20. (a) is a plan view, and (b) is a cross-sectional view. [Figure 5] 1 shows a pair of legs 6. (a) is a plan view, and (b) is a cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0007] FIG. 1 shows a water tank 3 using a civil engineering structure 1 according to one embodiment of the present invention. The civil engineering structure 1 is placed in a depression 2 covered with a waterproof sheet and backfilled with soil to form a water tank 3 capable of storing rainwater, etc. The space above the water tank 3 can be used as a parking lot, road, park, etc. The civil engineering structure 1 may be placed under a road surface or underground to be used as an embankment, or may be placed at the bottom of a dam to form a dam structure. Side walls 4 and a ceiling 5 may be provided on the sides and top of the civil engineering structure 1.

[0008] FIG. 2 shows a civil engineering structure 1 using pedestals (blocks) 10. The civil engineering structure 1 has a stack of one or more pairs of pedestals 6, each stacked so that the legs 12 of the pedestals 10 face each other. As shown in the figure, the stacks of the civil engineering structure 1 can also be arranged horizontally. As shown in the figure, the stacks may be spaced apart horizontally, or they may be closely spaced. A beam 30 may be placed between the horizontally arranged stacks to connect them. The pair of pedestals 6 has a support 20 within the legs 12 of the opposing pedestals 10.

[0009] FIG. 3 shows one embodiment of a pedestal 10 used in a civil engineering structure 1. The pedestal 10 is preferably made of plastic, as this makes the pedestal 10 lightweight and facilitates stacking work. As shown in the figure, the pedestal 10 has a base 11 and legs 12 protruding from the base 11. The legs 12 may be cylindrical with a constant cross-sectional area in the height direction, or may be frustum-shaped tapering upward as shown in the figure. In the figure, the cross section of the legs 12 is circular, but they may also be polygonal or other shapes.

[0010] As shown in the figure, a protrusion 13 and an engagement hole 14 are formed at the tip 12a of the leg portion 12. The engagement hole 14 is arranged at a rotationally symmetrical position that engages with the protrusion 13 when the legged bases 10 are stacked one on top of the other (FIG. 3(a)). Therefore, the legged bases 10 can be positioned and reliably stacked one on top of the other to construct a pair of legged bases 6 and a civil engineering structure 1.

[0011] In the above embodiment, the base 10 has one leg, but the number of legs may be any number. For example, a base with four legs may be used.

[0012] FIG. 4 shows the support 20. The support 20 is preferably made of PVC due to its availability on the market and light weight. It may also be made of metal. The support 20 is particularly preferably pipe-shaped (hollow) as shown in the figure. The cross section of the support 20 may be circular, polygonal, H-shaped, etc., but as shown in the figure, a shape with a baffle 21 (for example, a cross shape) is preferred because it greatly improves vertical strength. This also has the advantage of allowing for a large cross-sectional shape that does not interfere with the protrusion 13. Other shapes (star-shaped, hand-shaped, etc.) are also acceptable.

[0013] FIG. 5 shows a pair of pedestals 6, illustrating the positional relationship between the pedestal 10 and the support 20. As shown in the figure, the pair of pedestals 6 has upper and lower pedestals 10a and 10b. On top of these, pedestal 10b is placed with its leg 12 facing downward so that the protrusion 13 of pedestal 10b engages with the engagement hole 14 of pedestal 10a (FIG. 5(b)). As shown in the figure, the protrusion 13 of pedestal 10a should protrude through the engagement hole 14 of the leg 12 of pedestal 10b. The same applies to the protrusion 13 of pedestal 10b. In this case, if the support is placed so that the joint portion 21 of the support 20 is aligned with the position of the protrusion 13 of pedestals 10a and 10b of the pair of pedestals 6, the cross section of the support 20 can be made large without interfering with the protrusion 13.

[0014] The civil engineering structure 1 of the above embodiment can be constructed by manually arranging / stacking. The placement of the support columns 20 within the legs 12 improves vertical strength. Creep resistance can also be improved.

[0015] The civil engineering structures and the dimensions, shapes, arrangements, numbers, etc. of their elements described in the above embodiments are merely examples, and other embodiments are also possible. [Explanation of symbols]

[0016] 1...Civil engineering structure 2... depression 3. Water tank 4...Side wall 5. Ceiling 6. Pair of legs 10, 10a, 10b... Leg stand 11...base 12...legs 12a···Tip 13...protrusion 14 Engagement hole 20...post 21. Binding section 30...beam material

Claims

1. a pair of legged stands, each of which has a base portion and a leg portion, stacked one on top of the other with the legs facing each other; A civil engineering structure having a support column disposed within said leg.

2. 2. The civil engineering structure of claim 1, wherein the cross section of said support column is cruciform.

3. A civil engineering structure as claimed in claim 1, wherein a protrusion and an engagement hole that engages with the protrusion are formed at the tip of the leg, the protrusion of one of the pair of footrests protrudes through the engagement hole of the other of the pair of footrests, the support has a notch, and the support is positioned so that the positions of the notch and the protrusion coincide.

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