JP5054407B2 - Buried object protection plate and buried object protection plate installation structure - Google Patents

Description

  The present invention provides a cutter blade that is disposed along a longitudinal direction of the long buried object between the long buried object buried under the pavement surface and the pavement surface, and cuts the pavement surface. It is related with the buried object protection board for preventing that the said long buried object receives damage, and a buried object protection board installation structure.

The embedded object protection plate is often used as a rectangular plate made of ceramics. For example, a plurality of such plates are arranged in a band and embedded and fixed on the upper surface of concrete placed so as to cover a long embedded object. When the cutter is put on the pavement surface due to road construction, etc., the cutter blade acts on the buried object protection plate before acting on the buried object buried under the pavement surface. This is to make the cutting operator feel abnormal due to a phenomenon such as an increase in cutting resistance or a change in cutting sound. If the cutting operator can feel an abnormality, it is possible to take measures such as changing the cutting position to a safe position, and prevent an accident of damaging the buried object.
And as this kind of buried thing protection board B, as shown in FIG. 8, there exist some which were flat and formed all parts in the same thickness dimension.
Moreover, regarding the installation structure of the buried object protection plate, as shown in FIG. 8, the flat buried object is formed on the upper surface of the protector 4 formed by placing concrete or mortar so as to cover the long buried object 2. The protective plate B was provided in an embedded state, and the protective metal plate 5 for improving the impact resistance against the embedded object protective plate B and the pavement were laminated thereon.
The buried object protection plate B may be provided over the entire upper surface of the protector 4 as shown in FIG. 8A (see, for example, Patent Document 1), or as shown in FIG. In some cases, it is provided only below the left and right side edges of the protective metal plate 5 that tends to be the starting end side (or the terminal end side) when the cutter blade 3 is inserted (see, for example, Patent Document 2), and the latter compared to the former. In this case, since the total volume of the buried object protection plate B formed of an expensive material can be suppressed, the material cost can be reduced.

Japanese Patent Laying-Open No. 2005-282755 (FIG. 5) JP 2007-037240 A (FIGS. 1-2)

  According to the above-mentioned conventional buried object protection plate and the installation structure of the buried object protection plate, it is necessary to increase the thickness of the buried object protection plate in order to improve the safety against the cutter cutting of the long buried object, As a result, there has been a problem that the material cost of the buried object protection plate is greatly increased.

  Accordingly, an object of the present invention is to provide a buried object protection technique capable of improving the safety against cutting of a long buried object while eliminating the above-described problems and suppressing an increase in material cost. is there.

A first characteristic configuration of the present invention is that, between a long buried object buried under a pavement surface and the pavement surface, an upper side of the long buried object along one longitudinal direction. prevent and arranged to each of the other side, cut by the cutter blade for cutting the pavement surface to warn of the presence of the long buried object at early time points, long buried object is being damaged The protection plate body is made of a hard material, and is larger than the thickness dimension of the other end on the one end in the width direction of the protection plate main body. thickening portion Ri Ah provided, the planar shape of the protective plate body, one end portion in the longitudinal direction of the protective plate body is formed in a mountain shape, the other end is freely engaged with each other and the end portion A line that is formed in a valley shape and connects the top of the one end and the bottom of the other end in plan view is the width of the protection plate body. Is in place is formed in a shape biased parallel to either the left and right of the center line in the direction.

According to the first characteristic configuration of the present invention, the protective plate main body is made of a hard material, and the thickness of the other end on the one end in the width direction of the protective plate main body Since the large thickened portion is provided, the safety against cutter cutting can be improved by increasing the thickness of the thickened portion without increasing the overall thickness dimension of the protective plate body.
That is, if the buried object protection plate is installed so that the thickened portion is positioned on one side in the width direction of the long buried object, the width from one side to the other side in the width direction of the long buried object At the initial stage of cutting, a warning can be issued due to an increase in resistance or a change in sound due to the thickened portion, and the safety against cutter cutting can be improved.
Of course, if the buried object protection plate is installed so that the thickened portion is located on the other side in the width direction of the long buried object, the other side in the width direction of the long buried object is changed to one side. At the initial stage of cutting, a warning can be issued due to an increase in resistance or a change in sound due to the thickened portion, and the safety against cutter cutting can be improved.
And if the two said embedded object protection plates are each installed so that the said thickening part may be located in the one side and the other side in the width direction of a long embedded object, in the width direction of a long embedded object At the initial stage of cutting from either direction on one side or the other side, a warning can be issued due to an increase in resistance or a change in sound due to the thickened portion, further improving the safety against cutter cutting be able to.
Moreover, for the parts other than the thickened part of the protective plate body, it is difficult to reduce the safety level even if the thickness is made thinner than the thickened part. Rather, it is possible to reduce the number of materials, thereby suppressing an increase in material costs and reducing costs.
In addition, if the upper surface of the protective plate body is formed as a flat surface, when a protective metal plate or the like is installed on the protective plate body, it is easy to install both in close contact with each other, and work during burial construction Efficiency can be improved. Furthermore, when the close contact between the protective metal plate and the protective plate main body is improved, it is possible to receive the impact of the loading load or the cutter device in a distributed manner, for example, a buried object protection plate made of a material that is easily broken such as ceramics. Even when formed, it is possible to make it difficult to damage.
Furthermore, when the protective plate bodies are installed side by side in the length direction, it is possible to prevent mistakes in the front and back and in the right and left by simply fitting the mountain top and the valley bottom so that each is continuous in a strip shape. .

  The second characteristic configuration of the present invention is that one surface is formed as a flat surface in the thickness direction of the protective plate body.

  According to a third characteristic configuration of the present invention, the thickening portion is continuously increased from the other end portion to the one end portion so that the thickening portion is thicker toward the one end portion. It is in place where it is thick.

The 4th characteristic structure of this invention exists in the place which comprised the said protection board main body with the hard material made from ceramics.

According to a fifth feature of the present invention, there is a long buried object buried under a pavement surface and a longitudinal direction of the long buried object between the long pavement surface and the long buried object. A pair of buried object protection plates made of a hard material are installed separately on both sides across the object, and the existence of the long buried object at the initial stage of cutting with a cutter blade that cuts the paved surface. In the embedded object protection plate installation structure for warning and preventing damage to the long embedded object , the embedded object protection plate is provided at one end in the width direction of the other end. configuration tare Rutotomoni provided thickness greater increase thickness portion, the planar shape of the protective plate body, one end portion in the longitudinal direction of the protective plate body is formed in a mountain shape, the other end portion at one end Formed in a valley shape that can be fitted to each other, and the top of the one end and the other end in plan view Line connecting the bottom, Ri tare formed in a shape biased parallel to either the left and right from the center line in the width direction of the protective plate body, the increase thickness portion, the width direction outer side of the long buried objects The pair of buried object protection plates are installed separately to face each other.

According to the fifth characteristic configuration of the present invention, the buried object protection plate is configured such that a thickened portion larger than the thickness dimension of the other end is provided at one end in the width direction. Yes, because the pair of buried object protection plates are installed separately so that the thickened portion faces outward in the width direction of the long buried object, one side in the width direction of the long buried object・ While starting to insert the paving surface from any direction on the other side, at the initial stage of cutting, a warning can be issued due to an increase in resistance or a change in sound due to the thickened portion, and the cutter is cut. It is possible to further improve the safety level against.
In addition, despite the fact that such effects can be exhibited, since the thickness of the portion other than the thickened portion of the buried protection plate is thinner than that of the thickened portion, the material used as the whole buried protection plate is used. The amount can be reduced as compared with the case where all the parts are formed by the thickness of the thickened portion, and the cost of the material can be reduced.
Furthermore, when the protective plate bodies are installed side by side in the length direction, it is possible to prevent mistakes in the front and back and in the right and left by simply fitting the mountain top and the valley bottom so that each is continuous in a strip shape. .

According to a sixth characteristic configuration of the present invention, a protective metal plate is laid above the pair of buried object protection plates so as to cover the pair of buried object protection plates.

According to the sixth characteristic configuration of the present invention, it is possible to receive an overload acting on the pavement surface or an impact caused by a cutter device or the like in a dispersed state by the entire area of the protective metal plate. Even in the case where the buried object protection plate is formed, it is possible to mitigate the direct and concentrated impact on the buried object protection plate and make it difficult to damage.

According to a seventh characteristic configuration of the present invention, an upper surface of the buried object protection plate is formed as a flat surface, and a protective metal is formed on the upper surface of the pair of buried object protection plates. A plate is laid and the protective metal plate is placed in close contact with the upper surface of the buried object protection plate.

According to an eighth characteristic configuration of the present invention, the protection plate body is made of a ceramic hard material, and the thickened portion is thicker toward the end portion on the one side. The thickness of the buried object protection plate is continuously increased from one end to the one end, and the upper surface of the buried object protection plate is formed as a flat surface. The protective metal plate is laid in a state extending over the pair of buried object protection plates, and the protective metal plate is placed in close contact with the upper surface of the buried object protection plate.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.

[First Embodiment]
FIG. 1 shows a depth of less than 200 mm below the asphalt pavement surface 1 constituting the road surface, for example, a protective pipe through which a power transmission cable or a communication cable is inserted, or a long pipe such as a water pipe or a gas pipe. To show that the buried object 2 is not damaged by the rotary cutter blade 3 such as a diamond wheel cutting the pavement surface 1, the area around the buried object 1 is concrete, It is covered with a protective body 4 made of mortar or the like, and an embedded object protection plate (hereinafter simply referred to as a protection plate) A1 as an example of the embedded object protection plate A of the present invention is embedded in the upper surface side of the protective body 4. The upper part is fixed, covered with a steel plate (an example of a protective metal plate) 5, covered with soil 6, and paved with asphalt 7.

  That is, as shown in FIG. 1 and FIG. 2, the buried object 2 is laid in a trench for excavation in the ground before paving, and the protective body 4 is driven in a band shape so as to wrap the buried object 2, A plurality of protective plates A having the same shape are arranged in parallel and in a belt shape on both sides of the uncured protective body 4 in the width direction, and are embedded and fixed in the cured protective body 4.

The protective plate A1 is composed of a hard ceramic protective plate body 8 made of hard ceramic powder such as titanium boride, silicon nitride, zirconia, etc., and is formed in the width direction of the protective plate main body 8. The thickened portion 9 larger than the thickness of the other end portion 8B is provided on the one end portion 8A. However, the end portions 8A and 8B mentioned here do not mean only the end face portion of the member, but a range extending from the end face portion to the width direction by about 1/3, preferably about 1/4. In short, it means the entire range on the end side with respect to the central range in the width direction.
In the case of this embodiment, as shown in FIG. 3, the trapezoidal cross-sectional shape is such that the thickness is maximum at one end surface 8Aa in the width direction of the protective plate body 8 and the thickness is minimum at the other end surface 8Ba. It is formed. Therefore, the thickened portion 9 corresponds to the thickened side half section in the width direction of the protective plate body 8. Each peripheral surface is formed as a flat surface.
As shown in FIGS. 3 and 4, the planar shape of the protective plate A1 is such that one end 8C in the length direction of the protective plate main body 8 is formed in a mountain shape, and the other end 8D is It is formed in a valley shape that can be fitted to the one end portion 8C. The line connecting the peaks (tops) and valleys (bottoms) of the one end 8C and the other end 8D in plan view is set to be parallel to either the left or right of the center line in the width direction. . According to this configuration, when the protective plate main bodies 8 are installed side by side in the length direction, the front and back are mistaken or the left and right are mistaken by simply fitting the peaks and valleys so that each of them is connected in a strip shape. Can be prevented.
Therefore, it is possible to always arrange the thickened portion 9 of the protective plate body 8 on the intended side in the width direction.
Further, the one end portion 8C and the other end portion 8D are formed in a mountain / valley shape in plan view, so that, for example, as shown in FIG. 4, the cutter blades 3 are arranged between the protective plates A1 adjacent in the length direction. Even if it enters the joint, the cutting line L1 and the joint line L2 cross each other, and the cutter blade 3 always reaches the protection plate A1 and can prevent the long embedded object 2 from being cut carelessly.
Incidentally, the inner angle of the top of the mountain is preferably 130 to 170 degrees.

  As shown in FIG. 1, the protective plate A1 is provided separately on both sides along the lower surface of the steel plate 5. Both the right row and the left row are provided with the thickened portion 9. The steel plate 5 is installed in a state located on the end side in the width direction.

According to the protection plate A1 and the installation structure of the present embodiment, the cutting of the pavement surface 1 can be started from any direction on the one side or the other side in the width direction of the long embedded object 2. At an early stage, a warning can be issued due to an increase in resistance or a change in sound due to the thickened portion 9, and the safety level due to cutter cutting can be further improved.
In addition, in spite of being able to exert such an effect, the thickness of the portion other than the thickened portion 9 in the protective plate A1 is made thinner than that of the thickened portion. Therefore, it is possible to reduce the total thickness compared to that formed by the thickness of the thickened portion 9 and to reduce the cost of the material.
Furthermore, since the upper surface of the protective plate A1 is formed as a flat surface and is disposed along the lower surface of the steel plate 5, the closeness between the two is improved, and depending on the loading load, the cutter device, etc. The impact can be dispersed and received throughout, and an environment in which the protective plate A1 is difficult to break can be created.

[Second Embodiment]
FIG. 5 shows an embedded object protection plate (hereinafter simply referred to as a protection plate) A2 which is a second embodiment of the embedded object protection plate A of the present invention, and the description of the configuration overlapping with that of the previous embodiment is as follows. Omitted and the differences are mainly explained.

The protective plate A <b> 2 is formed to have a width dimension that can cover all the upper part of the long embedded object 2. In addition, the material of the protection plate A2 of this embodiment is made of cast iron instead of the ceramic described in the previous embodiment.
The protective plate main body 8 has a thickened portion 9 larger than the thickness of the intermediate portion 8E at each end 8A, 8B on one side of the intermediate portion 8E in the width direction and on the other side of the intermediate portion 8E. Are provided.
In the embodiment, as shown in the figure, the intermediate portion 8E has the same thickness dimension, and the thickened portions 9 on both sides of the intermediate portion 8E also have the same thickness dimension over the entire range in the thickened portion 9. Is formed.
Therefore, in the state where it is installed in the ground, in addition to being able to protect the upper part of the long embedded object 2 by the protective plate A2, both sides are formed at the initial point of cutting, particularly when the cutter is put into the pavement. The thickened portion 9 can appeal that the long buried object 2 exists below, and can prevent a cutting crisis in advance.

[Another embodiment]
Other embodiments will be described below.

<1> In the buried object protection plate according to the present invention, in addition to roads such as roadways and sidewalks, long buried objects embedded under pavement surfaces such as parking lots, playgrounds, and plazas cut the pavement surfaces. In order to prevent damage from being caused by the cutter blade being used, it may be embedded and fixed.
<2> The shape of the buried object protection plate is not limited to that described in each of the first and second embodiments. For example, it has a cross-sectional shape as shown in FIGS. It may be. That is, as shown in each figure, the shape of the thickened portion 9 can be changed as appropriate, and the position thereof is not only provided on the end surface portion in the width direction of the protective plate body 8, but also from the end surface portion. The thickened portion 9 may be formed at a position close to the center side (see FIGS. 6 (H) to (H) and FIGS. 7 (B) to (C)). Further, the thickened portion 9 and other portions may be formed in a shape including a curved surface (see FIGS. 6 (G) to (H) and FIGS. 7 (B) to (D)). And the upper surface of a buried object protection board is not necessarily a flat surface, For example, what was provided with the convex part like FIG.
Furthermore, as a longitudinal cross-sectional shape of the buried object protection plate, for example, a joint (an end portion 8C, the other end portion 8D in the longitudinal direction) with the other buried object protection plate to be adjacent is decided (aijakuri). It may be formed in a structure and applied in piles.
Further, the planar shape is not limited to that of the previous embodiment. For example, as described in the previous embodiment, the peaks of the one end portion 8C and the other end portion 8D in the longitudinal direction of the buried object protection plate. The line connecting the (top) and the valley (valley bottom) is not limited to the left or right side of the center line in the width direction, and may be formed so as to coincide with the center line. Good. Furthermore, the shape of the one end 8C and the other end 8D is not limited to a linear peak / valley shape, and may be a peak / valley shape including a curve, for example. Further, it may be a buried protection plate having a flat shape such as a rectangle or a parallelogram with no peaks and valleys, and can be changed as appropriate.
<3> Regarding the installation of the buried object protection plate, as described in the previous embodiment, it is not limited to the one arranged above the long buried object, for example, installed in a state of being stacked in a plurality of layers, It may be more reinforced.
Moreover, the material of the buried object protection plate may be any of the hard ceramics and cast iron described above, and may be a material having the same or higher hardness.
<4> In the installation structure of the buried object protection plate described in the previous embodiment, the protection metal plate 5 is disposed above. However, the protection metal plate 5 is not necessarily provided. However, in that case, it is preferable to increase the thickness dimension and the width dimension of the buried object protection plate.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

Sectional drawing which shows the installation condition of the buried object protection board of 1st Embodiment The disassembled perspective view which shows the installation condition of the buried object protection board of 1st Embodiment The top view and end view showing the buried object protection plate of the first embodiment Arrangement of buried object protection plate according to the first embodiment Sectional drawing which shows the installation condition of the buried object protection board of 2nd Embodiment Installation sectional view of buried object protection plate of another embodiment with respect to the first embodiment Installation sectional view of buried object protection plate of another embodiment with respect to the second embodiment Installation cross-section of the conventional buried object protection plate

DESCRIPTION OF SYMBOLS 1 Asphalt pavement surface 2 Long embedded object 3 Rotary cutter blade 5 Protective metal plate 8 Protective plate main body 8A One end portion 8B The other end portion 8C One end portion in the length direction of the protective plate main body 8D Protective plate main body The other end in the length direction 8E Intermediate part 9 Thickened part A Buried object protection plate

Claims (8)

Between the long buried object buried under the pavement surface and the pavement surface, the upper part of the long buried object is arranged on each of one side and the other side along the longitudinal direction. , the cleavage by the cutter blade for cutting the pavement surface to warn of the presence of the long buried object at early time points, a buried object protection plate for long buried object is prevented from being damaged ,
Protective plate body is Yes constituted of a hard material, the end of one side in the width direction of the protective plate body, Ri Oh and thickness greater increase thickness of the end of the other side is provided,
The planar shape of the protective plate main body is formed such that one end portion in the length direction of the protective plate main body is formed in a mountain shape, and the other end portion is formed in a valley shape that can be fitted to the one end portion. The buried object protection is formed such that a line connecting the peak portion of the one end portion and the valley bottom portion of the other end portion is viewed in parallel to the left or right of the center line in the width direction of the protection plate body. Board.   The buried object protection plate according to claim 1, wherein one surface is formed as a flat surface in the thickness direction of the protection plate body.   The thickened portion is provided by continuously increasing the thickness from the other end to the one end so that the thicker portion is thicker toward the one end. The buried object protection plate according to 2. The buried object protection plate according to any one of claims 1 to 3 , wherein the protection plate body is formed of a ceramic hard material. Between the long buried object buried under the pavement surface and the pavement surface, along the longitudinal direction of the long buried object and on both side positions straddling the long buried object, are made of a hard material. A pair of constructed buried protection plates are installed separately to warn of the presence of the long buried object at the initial stage of cutting with a cutter blade that cuts the paved surface, and the long buried object is damaged. It is a buried object protection plate installation structure to prevent receiving ,
The buried object protection plate, the end of one side in the width direction, the other end of the thickness provided dimensions greater increase thickness portion configured tare Rutotomoni, the planar shape of the protective plate body, One end portion in the length direction of the protection plate body is formed in a mountain shape, the other end portion is formed in a valley shape that can be fitted to the one end portion, and the peak portion of the one end portion in plan view wherein Ri and the other end line connecting the root portion of the portion is formed in a shape biased parallel to either the left and right from the center line in the width direction of the protective plate body tare, the increase thickness portion, the long buried objects The embedded object protection plate installation structure in which the pair of embedded object protection plates are separately installed in a state facing outward in the width direction. 6. The buried object protection plate installation structure according to claim 5 , wherein a protective metal plate is laid above the pair of buried object protection plates so as to cover the pair of buried object protection plates. The upper surface of the buried object protection plate is formed as a flat surface,
A protective metal plate is laid on the upper surface of the pair of buried object protection plates so as to cover the pair of buried object protection plates, and the protective metal plate is installed in close contact with the upper surface of the buried object protection plate. Item 5. The buried object protection plate installation structure according to Item 5 . The protective plate body is made of a ceramic hard material,
The thickened portion is provided by continuously increasing the thickness from the other end portion to the one end portion so that the thicker portion is thicker toward the one end portion,
The upper surface of the buried object protection plate is formed as a flat surface,
A protective metal plate is laid on the upper surface of the pair of buried object protection plates so as to cover the pair of buried object protection plates, and the protective metal plate is installed in close contact with the upper surface of the buried object protection plate. Item 5. The buried object protection plate installation structure according to Item 5 .

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