Civil and wooden structures

Abstract

The objective is to provide a civil engineering structure that can achieve both improved vertical strength and reduced construction costs. [Solution] A civil engineering structure comprising a stack of legged bases having a base and legs protruding from the base, wherein the legs have a cavity and a PVC pipe support is inserted into the cavity.

Description

Technical Field

[0001] The present invention relates to a pedestal suitable for use in a buried civil structure (frame structure / void structure), and a civil structure using the pedestal.

Background Art

[0002] There is known a water storage tank that forms a rainwater storage space by installing a civil structure in which a large number of blocks (pedestals) with a high void ratio are stacked in a depression and backfilling with soil (for example, Patent Document 1). The civil 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] Conventional civil structures were laminates of plastic pedestals (for example, Patent Documents 2 and 3). Therefore, there was a problem that the strength in the vertical direction was low and deformation occurred due to earth pressure from above. As a countermeasure, the inventor has studied the reinforcement of civil structures using concrete columns. However, the concrete columns are heavy, causing problems such as high construction costs. The present invention aims to provide a civil structure that can achieve both an improvement in vertical strength and a reduction in construction costs.

Means for Solving the Problems

[0005] This application includes A civil engineering structure comprising a stack of legs, each having a base and legs protruding from the base, The aforementioned leg portion has a cavity, A civil engineering structure is disclosed in which a PVC pipe support is inserted into the aforementioned cavity. [Brief explanation of the drawing]

[0006] [Figure 1] A civil engineering structure 1 according to the first embodiment of the present invention is shown. [Figure 2] A side view of civil engineering structure 1 is shown. [Figure 3] The legged base 10 is shown. (a) is a perspective view. (b) is a side view. (c) is a cross-sectional view. [Figure 4] Spacer 60 is shown. [Figure 5] A civil engineering structure 1A according to a second embodiment of the present invention is shown. [Figure 6] The legs 10a and 10b are shown. [Figure 7] This indicates joint 40. [Modes for carrying out the invention]

[0007] Figure 1 shows a civil engineering structure 1 according to a first 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. Wall materials 4 or a top plate 5 may be provided on the sides or top of the civil engineering structure 1.

[0008] Figure 2 shows a side view of the civil engineering structure 1. The civil engineering structure 1 has multiple stacked bodies 6 arranged in a horizontal plane. Each stacked body 6 has multiple legged bases 10 stacked vertically. As shown in the figure, it is preferable to arrange vertically adjacent legged bases 10 in opposite directions.

[0009] The civil engineering structure 1 has a PVC pipe support column 20 erected in the cavity 12a inside the leg portion 12. Other rigid resins may also be used.

[0010] As shown in the figure, the laminated body 6 may further have protective material 30 that fits with the upper or lower end of the support column 20. The protective material 30 fits with the end of the support column 20 and protects the top and bottom of the support column 20 and / or the top plate 5. The protective material 30 should be made of a hard material (hard resin / metal, etc.). PVC is particularly good. In the figure, protective material 30 is placed only at the ends of the topmost and bottommost support column 20 of the laminated body 6, but protective material 30 may also be placed at the other ends.

[0011] Figure 3 shows a legged base 10. As shown in the figure, the legged base 10 has a base portion 11 and leg portions 12 that protrude from the base portion 11. The leg portion 12 may be cylindrical with a constant cross-sectional area in the height direction, or it may be a frustoconical shape that tapers upwards. In the figure, the cross-section of the leg portion 12 is circular, but it may be a polygon or other shape. The leg portion 12 has a cavity 12a that is closed at the top and open at the bottom, and an inner wall 12b of the cavity 12a. A PVC pipe support 20 is inserted into the cavity 12a. The cross-sectional shape of the inner wall 12b may be circular, polygonal, or the like.

[0012] As shown in Figure 4, the horizontal strength may be improved by having a spacer 60 between the inner wall 12b of the leg portion 12 and the support column 20. The spacer 60 may be a cylindrical member having a hole with an inner diameter through which the support column 20 can pass. If the outer shape of the spacer 60 is matched to the cross-sectional shape of the inner wall 12b, it may be able to withstand forces from any horizontal direction.

[0013] The civil engineering structure 1 in the above embodiment is easy to construct (assemble) because each component (legged base 10, support column 20, etc.) can be made small and lightweight, and can even be constructed by hand. The presence of the support column 20 improves the vertical strength of the civil engineering structure 1.

[0014] Figure 5 shows a civil engineering structure 1A of a second embodiment of the present invention. As shown in the figure, the civil engineering structure 1A has a plurality of stacked bodies 6a arranged in a horizontal plane. Each stacked body 6a has a plurality of first legged bases 10a and second legged bases 10b.

[0015] The laminate 6a further has a second support column 20a made of PVC pipe. The second support column 20a is erected at the center of the laminate 6a (the center of the base portion 11 / the position between the plurality of leg portions 12). The second support column 20a may also be made of PVC pipe. The second support column 20a further improves the vertical strength of the civil engineering structure 1. As shown in the figure, it may have a protective material 30a similar to the protective material 30 that fits with the end of the second support column 20a.

[0016] The first pedestal 10a is installed at a place where it contacts the end of the second support column 20a, and the second pedestal 10b is installed in the middle of the second support column 20a.

[0017] FIG. 6 shows the first and second pedestals 10a and 10b used in the second embodiment of the present invention. As shown in FIG. 6(a), the pedestal 10a may have a recess 13 for positioning the second support column 20a or the protective material 30a at the center of the base portion 11. As shown in FIG. 6(b), the pedestal 10b in the middle of the second support column 20a has a column hole 14 at the center of the base portion 11. Otherwise, both the pedestals 10a and 10b can be the same as the pedestal 10.

[0018] Returning to FIG. 5, if the laminate 6a further has a joint 40 and a beam 50 made of PVC pipe, the horizontal strength of the civil engineering structure can also be improved. The joint 40 is inserted externally into the second support column 20a and held at a predetermined height position of the second support column 20a. In the figure, the joint 40 is held by the second support column 20a at the intermediate height between the upper and lower two base portions 11 facing the leg portions 12. A known method such as screwing can be used for the fixing method. The joint 40 may be held at the height position where the joint 40 is placed on the upper surface 11a of the base portion 11. The beam 50 connects between adjacent laminates 6a (the joints 40 thereof).

[0019] FIG. 7 shows the joint 40 used in the second embodiment of the present invention. The joint 40 is preferably a PVC pipe having a pipe hole 40a with an inner diameter larger than the outer diameter of the second support column 20a so that the second support column 20a can be inserted therein. As shown in the figure, the joint 40 has a protrusion 41 protruding in the horizontal direction.

[0020] The projection 41 should have an outer diameter smaller than the inner diameter of the beam 50 so that the beam 50 can be extrapolated as shown in the figure. The projection 41 may be rod-shaped, or it may be pipe-shaped with a hole 41a. A PVC pipe is particularly suitable. The adjacent laminated bodies 6a are connected by inserting both ends of the beam 50 into the projections 41 of the joint 40, which is extrapolated to the second support column 20a of the adjacent laminated body 6a, and supporting it.

[0021] The PVC pipes used for the columns 20, 20a, joints 40, and beams 50 of the civil engineering structure 1,1A are all readily available on the market as off-the-shelf products, thus reducing the cost of the civil engineering structure 1,1A. The dimensions, shapes, arrangements, and quantities of the civil engineering structure and its elements described in the above embodiment are illustrative examples, and other configurations are also possible. [Explanation of symbols]

[0022] 1,1A...Civil engineering structure 2... depression 3. Water storage tank 4. Wall materials 5. Tabletop 6,6a...Laminate 10, 10a, 10b... Stand with legs 11...base 11a...Top surface 12...legs 12a...Cavity 12b...Inner wall 13.. recessed area 14...post holes 15. Outer cylinder 16...Inner cylinder 20...post 20a...Second pillar 30,30a...Protective material 40... Joint 40a...Pipe hole 41...protrusion 50...beam 60... Spacer

Claims

1. A civil engineering structure comprising a stack of legs, each having a base and legs protruding from the base, The aforementioned leg portion has a cavity, A civil engineering structure in which PVC pipe supports are inserted into the aforementioned cavity.

2. The civil engineering structure according to claim 1, wherein a spacer is provided between the inner wall of the leg portion and the support column.

3. The civil engineering structure according to claim 1, further comprising a second support column made of PVC pipe in the center of the aforementioned laminate.

4. A joint for a PVC pipe externally fitted to the second support column, the joint having a plurality of projections protruding horizontally, A PVC pipe beam, the same as the one in claim 3, wherein both ends are fitted onto the projections of the joints of adjacent laminates, and the structure further comprises a beam connecting the laminates.

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