JP2003304616A - Underground burried pipe and burying method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure and a piping method, by which pipes having different forms can be easily stacked on a pipe body laid in parallel, and damage of the pipe body on lower side and its deformation with time can be minimized, when constructing an electric wire common groove. <P>SOLUTION: A pipe wall 1 is constituted of a pipe body P, which is arranged alternately and is formed by a sectional square wall portion 2 and a sectional circular wall portion 3 in the pipe axial direction, and a sectional circular pipe K disposed in the upper part thereof, wherein the piping position is secured by a pipe pillow 4 for controlling the piping position, by which the sectional circular pipe K is arranged at the prescribed intervals in the longitudinal direction and the pipe body P is provided on the lower side of respective pipe pillows 4, etc., with a sectional U-shaped load distribution covers c, etc., having a length extending over a plurality of walls 2, etc., in the sectional square wall portion 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire in which a plurality of pipes or a large number of pipes used for inserting and protecting cables such as electric wires, telephone lines and optical cables are buried in the ground in parallel. The present invention relates to an underground buried pipe for constructing a common ditch (usually called CC Box) and a method of burying it.

[0002]

2. Description of the Related Art Conventionally, underground buried joint grooves for wiring cables have been constructed in various forms.
Further, as the common groove forming pipe, a corrugated pipe whose pipe wall is formed in an annular or spiral corrugated corrugated shape and a straight pipe formed in a straight shape without irregularities are widely known and already used. Has been done.

[0003]

However, such a generally known tubular body has a circular shape over its entire length in the circumferential direction in both the former corrugated pipe and the latter straight pipe. In the piping, there is a problem that it is easy to rotate in the circumferential direction and the stability is poor, and it is difficult to maintain the parallelism when a plurality of pipes are arranged in parallel.

Therefore, the person involved in the present invention pays attention to the problems that the conventional circular pipe body has, and as a pipe body that solves the problems that these conventional pipes have, FIG. As shown in FIG. 12, the shape of the tube wall 1 is a structure in which the cross-section rectangular wall portions 2 and the cross-section circular wall portions 3 are alternately arranged in the tube axis direction, and the cross-section rectangular wall portions 2 ... Has been developed and already proposed (see Japanese Patent Application Laid-Open No. 8-219333), in which the tubular body is prevented from being rotationally moved in the circumferential direction.

The present invention distinguishes between the latter new tubular body and the former circular tubular body (hereinafter, these tubular bodies are distinguished from each other. Body, the latter tubular body is called a circular tube, and when both are included, it is simply referred to as a tubular body.) The present invention has been made for the purpose of providing a piping structure and a piping method suitable for parallel piping and stacked piping of the above-mentioned pipe body.

That is, the present inventor, when constructing the electric wire common groove, uses a tube body of both of these forms at the same time from the viewpoints of inserting and wiring the cable into the pipe and protecting the pipe inserting cable. Assuming that piping is done, parallel piping and stacked piping between pipes can be performed as easily as possible, and a pipe structure and a piping method that can minimize damage to each pipe and deformation over time are provided. Is proposed to.

[0007]

The construction of the underground buried pipe according to the present invention, which was devised to solve this problem, is such that the pipe wall 1 is
Square wall section 2 and circular wall section 3 in the pipe axial direction
And a tube body P having a circular cross section arranged above the tube body P, and the circular tube cross section K is arranged at predetermined intervals in its length direction. A pipe posture is ensured by the pipe pillows 4 for regulation, and the pipe body P has a length below the pipe pillows 4 ... It is configured to include load distribution covers c ...

The first means for burying the underground pipe is that the pipe wall 1 has a circular cross-section and a rectangular cross-section wall portion 2 in the pipe axial direction at a pipe body burying place excavated in the ground. A tubular body P in which wall portions 3 are alternately formed is arranged along the horizontal direction of the rectangular cross-section wall portion 2, and a plurality of walls of the rectangular cross-section wall portion 2 are arranged at predetermined intervals in the longitudinal direction. Load-distributed covers c having a U-shaped cross-section having a length extending over 2, 2, ... Are placed in a saddle shape, and a horizontally long plate body is formed on top of each load-distributed cover c. The lower pipe pillows 4a having the semicircular cut recesses d formed at the edges are arranged orthogonal to the pipe body P with the recesses d facing upward, and the pipe K having a circular cross section is piped on the recesses d. Further, on each of these lower tube pillows 4a, a semi-circular cut is formed on the lower side in a symmetrical manner with the lower tube pillows 4a. Recess d The formed upper tube pillow 4b ... were arranged, in which a structure for piping tubes K to the tubular body on P.

A second means for burying the underground pipe is that the pipe wall 1 is a circular cross-section and a square wall portion 2 in the pipe axial direction at a pipe body burying place where the underground is excavated. A tubular body P in which wall portions 3 are alternately formed is arranged along the horizontal direction of the rectangular cross-section wall portion 2, and a plurality of walls of the rectangular cross-section wall portion 2 are arranged at predetermined intervals in the longitudinal direction. A plurality of load distribution covers c having a U-shaped cross section having a length extending over 2, 2, ... Are mounted in a saddle shape, while a plurality of substantially rectangular plate bodies having circular through holes D are formed. , The tube pillow 4 having a circular cross section is inserted into the through hole D, and the tube pillows 4 are arranged in the posture orthogonal to the pipe body P above the load distribution cover c. The pipe K is arranged on the pipe body P.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In carrying out this, the material of the tubular body is not particularly limited, but a synthetic resin material is mainly used, and in the case of the rectangular tubular body,
Polyolefin resins such as polyethylene and polypropylene are often used because of their excellent water resistance and pressure resistance. The load distribution cover c formed in a U-shaped cross section is also preferably made of a polyolefin resin because it is less likely to deteriorate with time. However, the load distribution cover c is not limited to the one made of synthetic resin, and may be made of, for example, an iron plate which is rust-proofed by resin coating or other means.

Further, the sectional shape of the rectangular wall portion 2 of the tubular body P used in the present invention is not limited to an angular square shape, but the corner portions may be formed as shown in the embodiment drawings. The shape may be an arc shape, and the shape is not limited to a square shape, and may be a rectangular shape that is long in the horizontal or vertical direction.

[0012]

Embodiments of the present invention will now be described with reference to the accompanying drawings. FIGS. 1 to 6 show a basic embodiment of the present invention as a first embodiment. FIG. 1 is a perspective view showing a main part of a piping state, and FIG. 2 shows a pipe body and a load distribution cover. FIG. 3 is a perspective view for explaining the relationship between the components, FIG. 4 is a front view of FIG. 1, FIG. 5 is a side view thereof, and FIG. 6 is a front view showing the state of FIG. 4 in a long state. .

The rectangular tube P shown in the first embodiment is a tube formed by blow molding means by a generally known caterpillar system, and the tube P has a tube wall as shown in the drawing. The shape of 1 is formed so that a rectangular wall portion 2 having a substantially square cross-sectional shape with rounded corners and a circular wall portion 3 having a substantially circular cross-sectional shape are alternately and continuously formed in the tube axis direction. It is a polyethylene resin tube. Further, the outer diameter of the circular wall portion 3 shown in this embodiment is smaller than the four sides of the square wall portion 2.

Thus, the rectangular pipe body P is stably piped at the time of piping by using the straight side of the rectangular wall portion 2 of the section at the piping place so that the side runs along the horizontal direction. Next, at a predetermined interval in the longitudinal direction of the pipe body P, the upper surface of the pipe body P has a length that extends over almost four walls 2, 2 ... The formed large number of load distribution covers c ...
Place it like a saddle, as you can see. The load distribution covers c shown in the embodiment are made of polyethylene resin like the prismatic tube P.

Next, a plate body which is oblong as a whole,
From the lower pipe pillow 4a having a semi-circular cut recess d formed on the upper edge, and the upper pipe pillow 4b having a semi-circular cut recess d formed on the lower side symmetrically with the lower pipe pillow 4a. First, the lower tube pillows 4a on the lower side are placed above the intermediate portions in the lengthwise direction of the load distribution covers c, with the recesses d directed upward. And the cylindrical tube K having a circular cross section on each of the recesses d.
Are laid in a recumbent shape, and further, the upper tube pillows 4b are arranged on the lower tube pillows 4a with the respective semicircular cut recesses d facing downward.

As shown in FIGS. 4 and 5, the circular tube K formed in a straight tube shape with a circular cross section in this way is separated from the upper and lower tube pillows 4a and 4b at predetermined intervals in the longitudinal direction. In a state where the pipe posture is regulated by the pipe pillow 4 for regulating the pipe posture, that is, in a state where the free movement rotation in the circumferential direction is blocked, the rectangular tubular body P is passed through the pipe pillows 4 ... The load is distributed and supported by the plurality of rectangular wall portions 2 of the rectangular pipe body P by the load distribution covers c ...

7 to 9 show that the loads of the circular pipes K ... Piped upward in this way are distributed to the plurality of rectangular wall portions 2 ... And supported by the lower rectangular pipe body P. FIG. 7 shows an example of the pipes that have been piped. In the pipe example shown in FIG. 7, one circular pipe K is stacked above one polygonal pipe P shown in the first embodiment. 4 shows an example in which the perforated pipes are formed by connecting four pipes in parallel to each other in the lateral direction.

FIG. 8 shows parallel pipes in which 10 circular pipes K ... are stacked in 5 rows and 5 rows in a row above and above each of the rectangular pipes P .. Then, the perforated conduit is formed. As described above, the rectangular pipe body P to be piped downward may not be limited to only one stage but may be piled up in plural pipes in two or more stages, and in the case of the circular pipe K to be piped in the upper stage, two or more stages. It may be stacked in multiple stages. Further, the tube pillow 4 shown in the embodiment diagram has tube pillows 4a ..., 4 arranged at the lowermost part and the uppermost part.
The intermediate pipe pillows 4c are arranged in the middle portion of b, and the tubular pillows having semicircular cut recesses d are formed on both upper and lower edges. The intermediate tube pillows 4c ... Can be used not only in a single stage but also in a plurality of stages as needed, and a plurality of pipes K can be stacked and piped on the pipe body P. The intermediate tube pillow 4c referred to here is the tube pillow 4a of the lowermost part and the uppermost part.
, 4b ... of course can be used, but the intermediate tube pillow 4c shown in the embodiment is preferable because it has a small number of parts and is easy to stabilize.

Further, FIG. 9 shows that the through holes h1 ... h1 ..., h2 ... are pierced by pipes of a required diameter, and a plurality of pipes are piped vertically and horizontally with a predetermined space therebetween. , A rectangular pipe P with three horizontal rows and two vertical stages ...
And a state in which a plurality of circular pipes K ... are stacked and piped in two rows above and below to form a perforated pipe line thereabove. Further, the tube pillow 4 shown here is for intermediate placement in which the tube pillow 4a arranged at the lowermost portion, the tube pillow 4b arranged at the uppermost portion, and semicircular cut recesses d ... Are formed on both upper and lower edges. The intermediate tube pillow 4c and the intermediate tube pillow 4c are all elongated in the lateral direction, and three cut recesses d ... Are formed in the lateral direction. The tube pillow 4 according to the present invention may be one that is horizontally long as described above and that supports a plurality of tubes.

FIG. 10 shows still another embodiment, in which the pipe pillow 4 according to the present invention is piped like the conventional pipe holders H1 and H2 shown in FIG. It is assumed that a required number of through holes D ... Of a size corresponding to the pipe diameter are formed on a rectangular board in the vertical and horizontal directions.
Pipe K of required diameter to be piped in each through hole D ...
, And each of these tube pillows 4 is placed on a plurality of rectangular pipes P that are previously piped, and is placed in an orthogonal posture to the pipes P at the upper part of the load distribution cover c. Tube P
A plurality of pipes K are arranged on the upper part to form a perforated conduit. Further, the load distribution cover c having a U-shaped cross section shown in the embodiment is not used for one rectangular pipe P, but a plurality of rectangular pipes P ,.
In the illustrated case, the three rectangular tubular bodies P ... Are integrally formed to have a lateral width. The load distribution cover c, as referred to in the present invention, is thus implemented assuming that it has a lateral width equivalent to two widths or four widths of the rectangular tubular body P using the cover c. You can In such a case, there is also an advantage that the adjacent intervals of the plurality of rectangular tubular bodies P ... Are held at a predetermined interval.

The load distribution cover c according to the present invention has a length,
That is, there is no particular limitation on the length in the tube axis direction, but preferably the length is equivalent to the pitch of the three rectangular walls 2 ... Or the four rectangular walls 2 of the rectangular tube P. Things are good. For example, in the case where both end portions in the pipe axis direction have a length such that they are placed on two adjacent rectangular walls 2 and 2 (a length of about 1.5 pitch of the waveform of the rectangular pipe body P) When placed on the rectangular pipe P, both end portions are located on the circular wall portions 3 and 3 of the pipe P due to the carelessness of the operator or some external force action after the placement, and the middle portion is a single piece. Since the position of the circular pipe K located above one square wall 2 is concentrated on the single square wall 2, it is expected that the load of the circular pipe K arranged above will be concentrated on the single square wall 2. In order to avoid it, the length of the corrugated body of the rectangular pipe P is not less than 2 pitches, and it is always ensured that two or more rectangular walls 2,
It is preferable that it is set so as to get on top of 2.

Although the representative embodiments of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. For example, the circular tube K having a cross section may be replaced with a straight tube. A pipe having a bellows shape formed in a corrugated corrugated shape having a circular cross section is provided, and the constitutional requirements mentioned above are provided in the present invention, and the object referred to in the present invention is achieved, and appropriately modified within a range having the following effects Can be implemented.

[0023]

As is apparent from the above description, the underground buried pipe according to the present invention ensures that the pipe posture is secured by the pipe pillows for regulating the pipe posture at the predetermined intervals in the longitudinal direction of the circular cross-section pipe. Under each of these tube pillows, the tubular body for supporting the load of the circular pipe is provided with a load distribution cover having a U-shaped cross section having a length that spans a plurality of walls of the rectangular cross section wall portion. Since the load of the circular pipe in the upper section and the load of earth and sand that presses the circular pipe are concentrated on the single cross-section rectangular wall portion of the rectangular tubular body through the pipe pillow, the rectangular wall portion is compressed. A unique method of forming a perforated pipe line in a safe state, while circular pipes are laminated on a rectangular pipe body without causing the unexpected situation of deformation or damage. It has an effect.

Further, in the method for burying a underground pipe according to the present invention, the circular pipes of the circular pipe are provided below the pipe pillows for regulating the pipe posture arranged at predetermined intervals in the length direction of the circular pipe. By placing a load distribution cover, which has a U-shaped cross section, on the square tube that supports the load in a saddle shape, the load of the circular tube transmitted through the tube pillow and the load of earth and sand added to the circular tube. Is not concentrated on one square wall portion of the rectangular tube, but is distributed to multiple square wall portions via the load distribution cover, so that the square wall portion that receives the load is compressed and deformed, or locally. There is an advantage that it is possible to expect a remarkable effect that the perforated pipeline can be formed in a state in which the unexpected situation of being damaged due to damage to the pipe is minimized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a pipe according to a first embodiment.

FIG. 2 is a perspective view of a tube body and a load distribution cover.

FIG. 3 is a perspective view illustrating the relationship between each component.

FIG. 4 is a front view of FIG.

5 is a vertical side view of FIG.

FIG. 6 is a front view showing the state of FIG. 4 in a lengthy state with an intermediate portion omitted.

FIG. 7 is a vertical sectional side view showing a piping state.

FIG. 8 is a vertical sectional side view showing another example of a piping state.

FIG. 9 is a vertical sectional side view showing still another example of a piping state.

FIG. 10 is a vertical sectional side view showing still another example of a piping state.

FIG. 11 is a perspective view showing a conventional tubular body.

FIG. 12 is a front view showing a conventional tubular body.

[Explanation of symbols]

1 pipe wall 2 Sectional square wall 3 circular wall part 4 tube pillow 4a Lower tube pillow 4b Upper tube pillow K circular tube P tube D through hole c Load distribution cover d Notch recess

Claims (4)

[Claims] 1. A pipe body (P) in which a pipe wall (1) is formed by alternately arranging a square wall portion (2) and a circular wall portion (3) in a cross section in a pipe axis direction, and above the pipe body (P). The pipe cross section (K) with a circular cross section (K), which has a circular cross section, is secured by pipe pillows (4) for regulating the pipe posture that are arranged at predetermined intervals in the length direction. Under each of these tube pillows (4), the tubular body (P) has a cross section having a length that spans the plurality of walls (2), (2) of the cross section rectangular wall portion (2). Underground pipe with a character-shaped load distribution cover (c). 2. A pipe wall (1) is formed by alternately forming a rectangular cross-section wall portion (2) and a circular cross-section wall portion (3) in a pipe axis direction at a pipe assembly burying place excavated in the ground. A pipe (P)
The cross-section rectangular wall portion (2) is piped along the horizontal direction, and the length across the plurality of walls (2), (2) of the cross-section rectangular wall portion (2) at predetermined intervals in the length direction. A load distribution cover (c) having a U-shaped cross section having a cross section is placed in a saddle shape, and a horizontally long plate is formed on the upper edge of each load distribution cover (c). Lower pipe pillows (4a) with arc-shaped cut-out recesses (d) are arranged so that the recesses (d) face upward and are orthogonal to the tubular body (P), and a circular cross section is formed on the recesses (d). Pipe (K) of the above, and further, on each of these lower pipe pillows (4a) ...
The upper tube pillows (4b) having a semicircular cut recess (d) formed on the lower side symmetrically with (4a) are arranged respectively, and the tube body (P) is arranged.
Underground method of burying underground pipe with pipe (K) on top. 3. A pipe wall (1) is formed by alternately forming a square wall portion (2) and a circular wall portion (3) in a cross section in the pipe axis direction at a pipe assembly burying place excavated in the ground. A pipe (P)
The cross-section rectangular wall portion (2) is piped along the horizontal direction, and the length across the plurality of walls (2), (2) of the cross-section rectangular wall portion (2) at predetermined intervals in the length direction. A load distribution cover (c) having a U-shaped cross section having a cross section is placed in a saddle shape, and a horizontally long plate is formed on the upper edge of each load distribution cover (c). Lower pipe pillows (4a) with arc-shaped cut-out recesses (d) are arranged so that the recesses (d) face upward and are orthogonal to the tubular body (P), and a circular cross section is formed on the recesses (d). Pipe (K) of the intermediate pipe pillow (4) is formed on each of the lower pipe pillows (4a). 4c) ... are respectively arranged, and the pipe (K) having a circular cross section is laid once or a plurality of times over the recess (d) on the upper edge side thereof, and further, each of these intermediate pipe pillows (4c) … Above, symmetrically with the lower tube pillow (4a) Upper tube pillow a recess (d) cuts semicircular in side (4b) ...
And burying a plurality of pipes (K) on the pipe body (P), and laying the pipes (K) in a plurality of stages, and burying the pipes (K). 4. A pipe wall (1) is formed by alternately forming a rectangular cross-section wall portion (2) and a circular cross-section wall portion (3) in a pipe axis direction at a pipe assembly burying place excavated in the ground. A pipe (P)
The cross-section rectangular wall portion (2) is piped along the horizontal direction, and the length across the plurality of walls (2), (2) of the cross-section rectangular wall portion (2) at predetermined intervals in the length direction. A load distribution cover (c) with a U-shaped cross section is placed in a saddle shape, while a plurality of pipe pillows (C) that are circular plates and have circular through holes (D) ( 4)… Use this through-hole (D) with a circular cross-section tube (K)
Insert each of these tube pillows (4) ...
(c) A method for embedding an underground pipe in which the pipe (K) is arranged on the pipe (P) in a posture orthogonal to the pipe (P) above the pipe (P).