JP4785020B2 - Underground conduit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to underground pipeline for laying communication cables and power cables.
[0002]
[Prior art]
In recent years, in the field of laying communication cables and power cables underground, the number of cables to be laid in the same place has increased, so the number of cable drawing pipes has increased in multiple rows and multiple stages. Yes. Moreover, since the diameter of the pipe buried in the ground is determined according to the outer diameter of the cable accommodated therein, pipes of various diameters are often buried in the same place.
[0003]
FIG. 7 shows a conventional method in which a plurality of tubes having different diameters are buried in a plurality of rows and stages. In this method, a tube pillow 12 that supports the tube 10 with an appropriate interval in the longitudinal direction is used. The tube pillow 12 is composed of a lower half member 13A and an upper half member 13B, and a semicircular groove-like tube sandwiching portion 14 is formed on the opposing surface of both the half members 13A and 13B. The inner diameter of the tube clamping portion 14 is set slightly larger than the outer diameter of the tube 10. The tube 10 is sandwiched between such tube pillows 12, and the tube 10 is first piped in a plurality of rows in the groove 16 dug in the ground, and further stacked in a plurality of stages in the vertical direction. Thereafter, the groove 16 is backfilled with sand and the pipe 10 is buried.
[0004]
The tube pillow 12 varies in size depending on the diameter of the tube 10 and is designed so that the interval between the upper, lower, left and right tubes is constant when a tube having the same diameter is embedded. Therefore, when a pipe line is composed only of pipes of the same diameter, the distance between the pipes is kept constant, so that when sand is backfilled, sand enters vertically between the pipes, and the filling pressure is fully effective. be able to. However, as shown in FIG. 7, when pipes having different diameters are embedded, the gap between the pipes arranged in the lower stage and the gap between the pipes arranged in the upper stage are shifted laterally. It will enter diagonally as shown by the arrow S, and it will be difficult to fill the space between the tubes, and the pressure will not be effective. As a result, there may be a problem that the sand on the lower side of the pipe is not sufficiently collected and the road on the pipe is depressed after refilling.
[0005]
In addition, conventional tube pillows can be connected in the horizontal direction if they are the same size, but they cannot be connected in the horizontal direction if the sizes are different, so if tubes with different diameters are arranged in the horizontal direction, do not connect the tube pillows. However, in this case, since the stability of the stacked pipes cannot be ensured, there is also a problem that the stacked pipes may fall down during piping work or backfilling work.
[0006]
An object of the present invention is to provide an underground pipe line that is easy to be filled with backfill sand and is also effective in filling when pipes having different diameters are buried in a plurality of rows and stages.
Another object of the present invention is to provide an underground pipe line in which pipes stacked during piping work and backfilling work do not fall down.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses a tube pillow that supports a lower half member having a semicircular groove-like tube pinching portion on an opposing surface and a tube pillow supported by sandwiching the tube with an upper half member. In the underground pipe line where multiple pillows are arranged in multiple rows and multiple stages by arranging the pillows in multiple rows in the horizontal direction and stacking in multiple stages in the vertical direction,
The tube pillow is formed so that the size of the width and height decreases as the tube diameter decreases according to the diameter of the tube to be sandwiched,
The plurality of rows of the plurality of rows of pipes are piped so that the diameter becomes smaller toward the upper row by stacking the tube pillows in order of size.
The lower surface of the lower half member of the tube pillow and the upper surface of the upper half member are fitted so that the distance in the width direction is the same at a symmetrical position with respect to the center in the width direction, regardless of the size of the tube pillow. The tube pillows adjacent to each other are stacked so that only one tube pillow is placed on one tube pillow by fitting the fitting portion,
The lower half member and the upper half member of the tube pillow are formed with a slide ridge in the up and down direction on one side, and a slide ridge in the up and down direction on the other side. The tube pillows adjacent to each other in the horizontal direction are connected by sliding and fitting the slide ridges and slide ridges in the vertical direction.
It is characterized by this.
In this way, the gaps between the tubes are aligned in the vertical direction even if the sizes of the tubes are different, so that the backfilling sand is easily filled and the filling pressure is also effective.
[0008]
Delete [0009]
Delete [0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
Embodiment 1 FIG. 1 shows an embodiment of the present invention. This underground buried pipe is also supported by sandwiching one pipe 10 with a pair of lower half member 13A and upper half member 13B having a semicircular groove-like tube sandwiching portion 14 on the opposite surface as in the prior art. Use tube pillow 12 to do. In order to embed a plurality of tubes having different diameters in a plurality of rows and stages using such a tube pillow 12, the thickest tube is first formed at the bottom of a groove (not shown) dug in the ground. Tube pillows 12 sandwiching 10 are arranged in a plurality of rows in the horizontal direction. Next, tube pillows 12 with the second largest tube 10 sandwiched thereon are stacked and arranged in a plurality of rows in the horizontal direction. At this time, the central axis of the upper tube 10 is aligned with the central axis of the lower tube 10 in the vertical direction. Further, tube pillows 12 sandwiching the third thickest tube 10 are stacked thereon and arranged in a plurality of rows in the horizontal direction. At this time, the central axis of the upper tube 10 is aligned with the central axis of the lower tube 10 in the vertical direction.
[0012]
When the pipes 10 having different diameters are laid in a plurality of rows and stages in this order from the thicker, the gaps between the pipes 10 are aligned in the vertical direction. Therefore, when the groove is backfilled with sand, the sand is easily filled in the gaps between the pipes 10, and the filling pressure after filling can be sufficiently applied.
[0013]
When tubes with different diameters are arranged in multiple rows and stages as described above, the size of the tube pillow 12 becomes smaller as the tube becomes thinner (the tube pillow has an interval between the left and right tubes when the same size tube is embedded). (It is designed to be constant) In the second and higher stages, there is a gap between the tube pillows, and the tube pillows cannot be connected horizontally. In order to stabilize the position of the tube pillow even in such a state, a half member as shown in FIG. 2 may be used as the lower half member and the upper half member constituting the tube pillow. Although only the lower half member 13A is shown in FIG. 2, the upper half member 13B has the same structure as this, except that it is upside down.
[0014]
The lower half member 13A shown in FIG. 2 has a semicircular groove-shaped tube sandwiching portion 14 on the surface facing the upper half member, and the locking projections 18 and the locking holes 20 are formed on the flat surfaces on both sides thereof. Have. A claw that is hooked on the edge of the locking hole 20 is formed at the tip of the locking projection 18. As a result, when a tube is placed on the tube clamping portion 14 of the lower half member 13A and the upper half member having the same structure is placed thereon, the latch protrusion 18 and the latch hole 20 of both half members are engaged. Thus, both the half members are joined in a state where the pipe is sandwiched.
[0015]
On the lower surface of the lower half member 13A (the upper surface of the upper half member), a fitting convex portion 22 and a fitting concave portion 24 are formed at positions symmetrical with respect to the center in the width direction. When the tube pillows are stacked, the fitting convex portion 22 and the fitting concave portion 24 are fitted to each other so that the upper half member of the lower tube pillow and the lower half member of the upper tube pillow are It is the part to join. A claw that is caught inside the fitting recess 24 is formed at the tip of the fitting projection 22. The interval W between the fitting convex portion 22 and the fitting concave portion 24 is set to be constant regardless of the size of the tube pillow. In this way, even when the tube pillows 12 having different diameters are stacked as shown in FIG. 1, the central axis of the tube clamping portion 14 is aligned in the vertical direction.
[0016]
Further, a slide ridge 26 is formed in the vertical direction on one side surface of the lower half member 13A, and a slide ridge 28 is formed in the vertical direction on the other side surface. The slide ridges 26 and slide ridges 28 are arranged such that when a plurality of lower half members 13A are arranged adjacent to each other in the lateral direction, they are slid and fitted in the vertical direction so that they are adjacent to each other. This is a part for connecting the members 13A to each other.
[0017]
Next, a procedure for constructing the underground conduit as shown in FIG. 1 using the half member of FIG. 2 will be described. First, as shown in FIG. 3 (A), the thickest lower half member 13A for a pipe is arranged at predetermined intervals on the bottom of a groove dug in the ground. At this time, the lower half member 13 </ b> A adjacent in the lateral direction connects the slide projection 26 and the slide recess 28 by sliding fitting. Next, as shown in FIG. 5B, a plurality of the thickest pipes 10 are piped so as to be placed on the pipe holding portion 14 of each lower half member 13A. Thereafter, the upper half member 13B is covered from the top of the tube 10, and the locking projections 18 and the locking holes 20 (see FIG. 2) of the lower half member 13A are connected to the locking holes 20 of the upper half member 13B. By fitting the locking projection 18, the lower half member 13A and the upper half member 13B are coupled. As a result, the thickest pipe 10 is positioned by the pipe pillow 12 and piped as shown in FIG.
[0018]
Next, as shown in FIG. 4 (A), the lower half member 13B for the second thickest pipe is stacked on the upper half member 13B for the thickest pipe. At this time, the fitting concave portion 24 and the fitting convex portion 22 on the lower surface of the lower half member 13A are fitted into the fitting convex portion 22 and the fitting concave portion 24 on the upper surface of the upper half member 13B, respectively. As a result, the upper half member 13B for the thickest tube and the lower half member 13A for the second thickest tube are joined together with the central axis of the tube clamping portion 14 aligned vertically. Next, as shown in FIG. 5B, after piping a plurality of pipes so that the second thickest pipe 10 is placed on the pipe sandwiching portion 14 of each lower half member 13A, the upper half member 13B from above is piped. To cover the lower half member 13A. The coupling method is the same as in the first stage. Thereafter, if a thick tube is piped on the third surface using a tube pillow for the third thickest tube in the same manner, an underground conduit similar to that in FIG. 1 can be obtained.
[0019]
[ Related Art 1 ] FIG. 5 shows a related art of the present invention. In this related technique , when pipes having different diameters are piped in a plurality of rows and stages, the pipes having the same diameter are arranged in the vertical direction. In this related technique , first, the lower half member 13A for the thickest pipe and the lower half member 13A for the second thickest pipe are formed at the bottom of the groove dug in the ground as shown in FIG. , Side by side. At this time, the slide ridges 26 and slide ridges 28 on both side surfaces are slid and fitted in the vertical direction to connect the lower half members 13A and 13A having different sizes in the horizontal direction.
[0020]
Next, as shown in FIG. 5 (B), the thickest pipe 10 and the second thickest pipe 10 are respectively piped on the connected lower half members 13A and 13A, and the thickest pipes are respectively provided on the pipes. The upper half member 13B and the second thicker pipe upper half member 13B are covered and joined to the lower half members 13A and 13A. Also at this time, the slide ridges on the side surface and the slide ridges are slid in the vertical direction. As a result, the tube pillows 12 having different sizes sandwich the tube 10 and are connected in the lateral direction. After that, the lower half member 13A, the pipe 10, and the upper half member 13B of the same size are stacked on the upper half member 13B for the thickest pipe, and on the upper half member 13B for the second thickest pipe. The lower half member 13A, the tube 10, and the upper half member 13B of the same size are stacked.
[0021]
In this way, if the half members 13A and 13B as shown in FIG. 2 having the slide ridges 26 and the slide ridges 28 that are slidably fitted in the vertical direction on the side surfaces are used, the tube pillows 12 of different sizes can be horizontally When connecting pipes with different diameters in multiple rows and stages, stacking pipes with the same diameter in the vertical direction eliminates the risk of the stacked pipes falling down, and there is no gap between the pipes 10. Since they are aligned in the vertical direction, sand is easily filled between the pipes 10 during backfilling, and the effect of filling pressure is improved.
Note that FIG. 5 shows the case where there are two types of tube diameters for the sake of simplicity, but the same applies to cases where there are three or more types of tube diameters.
[0022]
Embodiment 2 FIG. 6 shows another embodiment of a lower half member and an upper half member constituting the tube pillow. Although only the lower half member 13A is shown in FIG. 6, the upper half member 13B has the same structure as this, except that the top and bottom are reversed. The lower half member 13A is different from that shown in FIG. 2 in that a slide convex portion 30 and a slide concave portion 32 extending in the tube axis direction are formed at symmetrical positions with respect to the center in the width direction on the lower surface. . The slide convex portion 30 and the slide concave portion 32, when stacking the tube pillow, by slidingly fitting them in the tube axial direction with the other slide concave portion and slide convex portion, the upper half member of the lower tube pillow and It is a part which couple | bonds the lower half member of an upper tube pillow. The interval W between the slide protrusion 30 and the slide recess 32 is set to be constant regardless of the size of the tube pillow. Even in such a configuration, when the tube pillows 12 having different diameters are stacked as shown in FIG. 1, the central axis of the tube clamping portion 14 can be aligned in the vertical direction. Since the configuration other than the above is the same as that of FIG. 2, the same parts are denoted by the same reference numerals and description thereof is omitted.
[0023]
【The invention's effect】
As described above, according to the present invention, when pipes having different diameters are piped in multiple rows and multiple stages and buried underground, the gaps between the pipes are aligned in the vertical direction. In addition, it becomes easier to fill the gaps between the pipes with sand, and the filling pressure also becomes more effective. Therefore, the ground surface can be prevented from sinking after construction.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an underground conduit according to the present invention.
2 shows an embodiment of a lower half member that constitutes the tube pillow underground pipe road according to the present invention, (A) is a plan view, (B) is a front view, (C) is Bottom view, (D) is a left side view, (E) is a right side view.
FIGS. 3A to 3C are front views showing a procedure for constructing the first stage of the underground conduit as shown in FIG. 1 using the halved member of FIG. 2;
FIGS. 4A and 4B are front views showing a procedure for configuring the second stage in the same manner.
FIGS. 5A and 5B show related technologies of underground buried pipes according to the present invention, FIG. 5A is a front view at the beginning of assembly, and FIG. 5B is a front view after assembly.
FIGS. 6A and 6B show another embodiment of a lower half member constituting the pipe pillow for the underground pipe according to the present invention, FIG. 6A is a plan view, FIG. 6B is a front view, and FIG. Is a bottom view, (D) is a left side view, and (E) is a right side view.
7A is a plan view and FIG. 7B is a cross-sectional view showing a conventional underground conduit before being backfilled.
[Explanation of symbols]
10: Tube
12: Tube pillow
13A: Lower half member
13B: Upper half member
14: Tube clamping part
18: Locking protrusion
20: Locking hole
22: Mating protrusion
24: Mating recess
26: Slide ridge
28: Slide groove
30: Slide convex part
32: Slide recess

Claims (1)

Using the tube pillow (12) that supports the tube (10) with the lower half member (13A) and the upper half member (13B) having a semicircular groove-shaped tube sandwiching portion (14) on the opposing surface, Tubes (10) sandwiched between pipes (10) are arranged in multiple rows in the horizontal direction and stacked in multiple rows in the vertical direction, so that multiple tubes (10) with different diameters are piped in multiple rows and multiple rows In the underground conduit that was buried underground,
The tube pillow (12) is formed so that the size of the width and height decreases as the tube diameter decreases according to the diameter of the tube to be sandwiched,
The multi-row, multi-stage pipes (10) are piped so that the diameter decreases toward the upper stage by stacking the pipe pillows (12) in order of size,
Regardless of the size of the tube pillow, the lower half member (13A) of the tube pillow and the upper surface of the upper half member (13B) are spaced apart in the width direction (W ) Are formed so that the fitting parts (22, 24) are the same, and the tube pillows that are adjacent to each other on the top and bottom are fitted on one tube pillow by fitting the fitting parts (22, 24). Stacked so that only one tube pillow is on board,
The lower half member (13A) and the upper half member (13B) of the tube pillow have a slide protrusion (26) formed vertically on one side surface and a slide recess vertically formed on the other side surface. A strip (28) is formed, and the tube pillow (12) adjacent in the lateral direction at the bottom is connected by sliding the slide ridge (26) and slide ridge (28) in the vertical direction. ing,
Underground conduits characterized by that.

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