JPH10178731A - Method of executing construction work for protecting underground conduit and block for construction work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to execut a construction work simply, speedily and easily for protecting an underground conduit. SOLUTION: A pre-cast concrete block (a first block) 2 of a rectangular slab shape, on one surface of which stripes of grooves 5 of an arc cross section are formed, and a pre-cast concrete block (a second block) 3 of the rectangular slab shape, on both surfaces of which stripes of grooves 6 of an arc cross section are formed, are stacked. A conduit-protecting body 4 with conduits 1 passing through the roughly circular holes formed by the stripes of grooves 5, 6 is buried underground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground pipeline protection construction method and a construction block therefor, and more particularly to a method for protecting an underground pipeline such as a cable buried underground from a load applied from a road surface. The purpose is to prevent damage and destruction of the middle pipeline.

[0002]

2. Description of the Related Art Obscene aerial cables such as power lines and telephone lines in urbanized areas have been abolished under environmental beautification, and burying them all underground has been strongly promoted. In the middle pipeline, it is necessary to take measures against the load caused by vehicles traveling on the road surface. In other words, underground pipes are generally buried under the sidewalks of roads, but at T-shaped intersections, crossroads, and parking entrances that cross the sidewalks, an excessive load may be applied when vehicles pass. In some cases, the underground pipeline at the site may be damaged or destroyed.

[0003] Therefore, conventionally, the burial depth at the site is increased, or a reinforcement is formed from cast-in-place concrete by surrounding the underground pipeline in a box shape, and an iron plate is placed thereon. Burying has been done. That is, a part of the underground pipeline was hardened with concrete and reinforced, and even if it was dug down from the road surface, the iron plate was able to stop it.

[0004]

However, since the above-mentioned reinforcement of a part of the underground pipeline is all the work of placing ready-mixed concrete which requires on-site work, a certain number of workers and a concrete mixer truck are required. And the like, and the work cannot be completed until the concrete is solidified. Therefore, traffic regulation is prolonged, construction costs are increased, and traffic obstacles which hinder economic activities are caused.

Accordingly, the present invention provides an underground pipeline protection construction method and a construction block for the purpose of enabling simple, quick and easy underground pipeline protection construction.

[0006]

In the underground pipeline protection construction method according to the present invention, a rectangular disc-shaped precast concrete block having arc-shaped cross-section grooves formed on one surface and arc-shaped cross-section grooves are formed on both sides. It is characterized in that a rectangular disc-shaped precast concrete block is superimposed, and a conduit is inserted into a substantially circular hole formed by the groove and buried in the ground.

The underground pipeline protection construction block according to the present invention is a square-plate-shaped precast concrete block in which a groove having an arc-shaped cross section is formed on one side, and a precast concrete block having a groove-shaped groove having an arc-shaped cross section formed on both sides. It is characterized by being able to penetrate a conduit into a substantially circular insertion hole formed by vertically overlapping the two boards so that the grooves of the arc-shaped cross section are aligned vertically.

[0008] The groove having an arc-shaped cross section comprises an arc portion and a straight portion which opens from both ends of the arc portion at a predetermined angle toward the upper surface or the lower surface, and wherein the two precast portions are formed. The number of grooves of the arc-shaped cross section of the concrete block is the same, and furthermore, oblong holes and circular holes are formed alternately at the side edges in the longitudinal direction of the precast concrete block. It is characterized in that guide pins can be fitted and positioned relative to each other.

Therefore, since the precast concrete block is buried around the underground pipeline, it is not necessary to perform on-site construction, and the work can be performed simply and quickly, so that the construction cost can be reduced and the on-site restoration can be quickly performed. Traffic obstacles can be minimized.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a first block made of a square-plate-shaped precast concrete block in which a groove for forming an insertion hole for inserting an underground pipe 1 such as a vinyl chloride pipe for accommodating a cable or the like is formed on one side. 2 (hereinafter abbreviated as block 2) and a second block 3 (hereinafter abbreviated as block 3) composed of a square-panel-shaped precast concrete block having grooves on both sides formed with an insertion hole for inserting the underground pipeline 1. ) Is to protect a plurality of the above two types of blocks by surrounding them with a pipe protector 4 formed by overlapping the above and below.

The larger the blocks 2 and 3 are, the greater the strength is and the reinforcing ability is increased. However, since the factory productivity, workability and transportability are restricted, it is preferable to reduce the size of the blocks 2 and 3 as much as possible. Therefore, the blocks 2 and 3 which have been miniaturized as much as possible
As shown in FIG. 2, the upper and lower stages are stacked so as to be shifted from each other by half in the manner of the brickwork construction method. FIG.
As shown in the figure, by forming a gap between the ends of one side in the longitudinal direction of the blocks 2 and 3 densely on the same plane and forming a gap between the ends of the other side (the arrow a side), The road protector 4 can be curved. In addition, as shown in FIG. 1, an iron plate 7 may be placed on the pipe protection body 4 as in the related art.

The blocks 2 and 3 will be described. The first block 2 is, as shown in FIGS. 4 to 7, a rectangular disc-shaped precast concrete block having a predetermined length L, a width W and a thickness T. The second block 3 has the same predetermined length L, width W and thickness T as the block 2 as shown in FIGS.
A precast concrete block having a rectangular disk shape having dimensions, and having grooves 6 having the same arc-shaped cross section as the grooves 5 formed on both surfaces thereof. The number of the grooves 5 and 6 having the arc-shaped cross section is the same. However, the number of the grooves 5 and 6 may be one. In addition, as shown in FIGS.
The longitudinal reinforcing bars 16 and the transverse reinforcing bars 17 for reinforcement
Is buried.

As shown in FIG. 12, the grooves 5 and 6 having an arc-shaped cross section are composed of a circular arc portion 8 and linear portions 9 and 9 which are inclined from both ends thereof at a predetermined angle in the vertical direction. The arc portion 8 is a substantially semicircular portion having a radius substantially the same as the radius of the underground pipeline 1, and the straight portion 9 is directed to the left and right so as to easily introduce the underground pipeline 1 into the arc portion 8. Open at a given angle. Alternatively, as shown in FIG. 13, chamfered inclined surfaces 11, 11 may be formed on both sides of the ridge 10 formed between the grooves 5, 5, or 6, 6.

Further, a conical circular hole 13 and an elliptical oval hole 14 are formed at the side edges of the surfaces of the blocks 2 and 3 where the grooves 5 and 6 are formed. As shown in FIGS. 14A and 14B, the oblong hole 14 is an inner and outer double oval having a long axis and a short axis, the inner oval forms a hole bottom, and the outer oval. Is open. These holes 13,1
As shown in FIG. 14 (B), when the blocks 2 and 3 are stacked, they match up and down, and
Can be engaged with the guide pin 15. Guide pin 1
Numeral 5 is made of a metal such as steel, plastic, or the like, which is formed by joining two identical conical bodies together at their bases.

Therefore, the oblong hole 13 can be engaged with the guide pin 15 by displacing the position of the guide pin 15 in the longitudinal direction along the long axis, so that the conduit protection body 4 has a curve as shown in FIG. If necessary, a gap can be formed between the blocks 2 and 2 or between the blocks 3 and 3 on the side indicated by the arrow a in FIG. As shown in FIG. 14 (C), when the circular holes 13 and 13 are aligned vertically, the guide pins 15 are closely fitted to each other.
Cannot be displaced from each other.

Therefore, when forming the reinforcing portion 4, FIG.
As shown in FIGS. 3 to 3, a plurality of substantially circular insertion holes formed by stacking the two blocks 2 and 3 together with the grooves 5 and 6 or by connecting the two blocks 2 and 2 with the grooves 5 , 5 can be inserted into a plurality of substantially circular insertion holes formed by stacking the underground pipes 1 respectively.

The blocks 2 and 3 are laid in such a manner that the lowermost block 2 is laid at the bottom of the underground groove, the lowermost underground pipeline 1 is placed in the groove 5, and then the block 3 is mounted. On the underground conduit 1 with the groove 6 on the lower surface,
The blocks 2 and 3 and the underground pipeline 1 are alternately stacked such that the next-stage underground pipeline 1 is laid in the groove 6 on the upper surface. In this case, the upper and lower blocks 2 in the longitudinal direction of the reinforcing portion 4
3 and squeeze each other. When the reinforcing portion 4 is to be curved, an interval between the blocks 2 and 3 on one side of the reinforcing portion 4 is appropriately increased. As shown in FIG. 1, an iron plate 7 or the like may be placed on the upper surface of the conduit protection body 4 and backfilled as before.

Thus, the pipeline protector 4 necessary for the underground pipeline to cross the T-shaped intersection, the crossroad, the entrance of the parking lot, etc. can be constructed simply, quickly and easily with the precast concrete block.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The thickness T, width W and length L of the blocks 2 and 3 can be mass-produced according to predetermined standards with appropriate dimensions in consideration of factory productivity, workability and transportability. That is, since the underground pipeline 1 is currently used based on a predetermined standard, the thickness T can be determined in conformity with its dimensions.
This is because the necessary length of the reinforcing portion and the like can be determined by the width of the road surface or the like crossing the underground pipeline. Incidentally, the thickness T of the block 2 is about 83 mm, the width W is about 414 mm, and the length L is about 1000 mm. Also, the thickness T of the block 3
Is about 131 mm, width W is about 414 mm, and length L is about 10
00 mm. Further, the radius of the arc portion 8 of the grooves 5 and 6 is about 53 mm, and the opening interval between the straight portions 9 is about 107 mm. The distance between the grooves 5, 5 or 6, 6 (ridge 10) is about 17 mm
It is. The depth of the circular hole 13 is about 28 mm and the large diameter is about 1
5.5 mm, small diameter is about 7.5 mm. Oval hole 14
Has a depth of about 28 mm, a major axis length of about 54 mm, a minor axis length of about 18 mm, a bottom major axis length of about 30 mm, and a bottom minor axis length of about 10 mm.

[0020]

According to the present invention described above, a reinforcing member for an underground pipeline can be formed easily and quickly and easily by laminating precast concrete blocks. Eliminates personnel,
Moreover, since it can be backfilled immediately after the construction and the site can be quickly restored and immediately used for vehicle traffic, the construction period can be shortened, the construction cost can be reduced, and traffic obstacles due to the construction can be quickly resolved. Moreover, a large number of underground pipelines can be handled by combining two types of blocks.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of a working example of the present invention.

FIG. 3 is a perspective view of another construction example of the present invention.

FIG. 4 is a plan view of a first block showing an embodiment of the present invention.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a sectional view taken along line AA of FIG. 4;

FIG. 7 is a sectional view of FIG. 4;

FIG. 8 is a plan view of a second block showing the embodiment of the present invention.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a sectional view taken along line BB of FIG. 8;

FIG. 11 is a sectional view of FIG. 8;

FIG. 12 is a sectional view of a groove.

FIG. 13 is a sectional view of a main part between grooves.

14A is a plan view of an oblong hole, FIG. 14B is a cross-sectional view showing an engaged state between a circular hole and an oblong hole, and FIG. 14C is a sectional view showing an engaged state of a circular hole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Underground pipeline 2 ... 1st block 3 ... 2nd block 4 ... Pipeline protection body 5, 6 ... Strip groove 8 ... Arc part 9 ... Linear part 11 ... Chamfering inclined surface 13 ... Circular hole 14 ... Oval hole 15… Guide pin 16, 17… Bar arrangement

Claims (5)

[Claims] 1. A precast concrete block in the form of a square disk having an arc-shaped cross section formed on one side thereof and a precast concrete block in the form of a square disk having an arc cross section formed on both sides are formed to form the grooves. Underground pipeline protection construction method characterized by inserting a pipeline into a substantially circular hole to be buried underground. 2. A precast concrete block in the form of a square board having a groove having an arc-shaped cross section formed on one side and a precast concrete block having a square board formed with a groove having an arc cross section formed on both sides. An underground pipeline protection construction block characterized in that a pipeline can be inserted into a substantially circular insertion hole formed by vertically aligning the grooves of the arc-shaped cross section. 3. The ground according to claim 2, wherein the groove having the arc-shaped cross section includes an arc portion and a straight portion which is inclined at a predetermined angle from both ends of the arc portion toward the upper surface or the lower surface. Block for middle pipeline protection construction. 4. The underground pipeline protection construction block according to claim 2, wherein said two precast concrete blocks have the same number of grooves in an arc-shaped cross section. 5. The precast concrete block according to claim 2, wherein an oblong hole and a circular hole are formed at a side edge portion in a longitudinal direction of the precast concrete block, and guide holes are fitted into both holes to enable mutual positioning. 5. The underground pipeline protection construction block according to any one of items 4 to 4.