JPH06101206A - Precast concrete pavement slab for road heating - Google Patents

Abstract

PURPOSE:To enable execution and to make it possible to reduce a construction period to obtain the pavement surface having snow-melting function. CONSTITUTION:Concrete pavement slabs 4 are laid on the upper part of a U-shaped channel 1 capable of passing inside the channel. A hot water pipe 6 is buried in the concrete pavement slabs 4 at a plant, and both screw sockets 8 as the pipe ends of the hot water pipe 6 are projected to the rears of the pavement slabs 4. Both screw sockets 8 projected to the rears of the concrete slabs 4 are connected to a pressure-feed pipe 11 and a drain pipe 12 piped to the inside of the U-shaped channel 1. Hot water is circulated into the pressure-feed pipe 11, hot-water pipe 6 and drain pipe 12 to melt snow on the surface. Workers can operate and inspect connecting positions of the hot water pipe 6 with the pressure-feed pipe 11 and drain pipe 12 through the inside of the U-shaped channel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete pavement plate for road heating, and more particularly to a precast concrete pavement plate for road heating which is laid above a U-shaped groove to form a pavement surface.

[0002]

2. Description of the Related Art Generally, a concrete paved surface for road heating has a hot water pipe embedded in a concrete layer, and the pipe end of the hot water pipe is connected to a pumping pipe and a distribution pipe which are pipe lines buried in the soil. The hot water sent from the pressure feed pipe is passed through the hot water pipe to melt snow on the pavement surface and drained to the drain pipe. After that, the concrete is poured and the hot water pipe is embedded in the concrete layer to form a paved surface. By the way, water pipes, gas pipes, telephone line cables, etc. are buried in the soil below the pavement surface, and these are singly or in plurals arranged in a U-shaped groove buried in the soil, a so-called common groove. It is also known that a lid is provided on the upper portion of the U-shaped groove so that the upper surface of the lid can pass through.

[0003]

In the above-mentioned U-shaped groove of the prior art, a lid is provided on the upper portion of the lid, and the upper surface of the lid is passable. However, in a snowfall region, the lid is placed above the lid during the winter. There was a problem that it was blocked by the snow.
Therefore, the U-shaped groove must be buried in a place where there are no people or vehicles passing, and at the site where people or vehicles pass, the road heating concrete pavement or the like is used on site to remove snow. However, it is difficult to shorten the construction period because many processes such as hot water pipe piping, concrete pouring and curing are performed on site in such on-site construction, and hot water is circulated through the hot water pipe. The pipe is embedded in the soil below the pavement surface, and the hot water pipe and the pipe are connected at regular intervals via a valve. An inspection port must be provided for each, and there was a problem that construction time and construction cost were required.

Therefore, an object of the present invention is to provide a concrete paving slab for road heating, which is easy to construct and can shorten the construction period in order to obtain a paving surface having a snow-melting function.

[0005]

SUMMARY OF THE INVENTION The present invention is a pavement slab which is laid on the upper part of a U-shaped groove through which the inside can pass and forms a pavement surface. The pavement slab has a hot water pipe embedded in a concrete pavement plate. However, the pipe end of the hot water pipe is projected to the back surface of the pavement plate.

[0006]

With the above construction, the precast concrete pavement slab molded in the factory is laid on the upper part of the U-shaped groove, and the pipe end of the hot water pipe protruding to the back surface of this concrete pavement is piped into the U-shaped groove. A pavement surface with a snow-removing function can be obtained by connecting to a pipeline for the purpose. Then, the worker can operate and inspect each connection point between the hot water pipe and the pipeline through the U-shaped groove.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention, in which 1 is a U-shaped groove made of concrete which is buried in the soil under the sidewalk A.
For example, the outer width of the upper part is 3000 mm, the outer width of the lower part is 1620 mm, and the height is 1200 mm as shown in the sectional view of FIG.
It has a thickness of about 200 mm and is molded at a certain length in the factory to be lined up and buried in the length direction at the site, or a formwork (not shown) is assembled at the site and the concrete in the formwork is placed. Formed. Further, in the U-shaped groove 1,
A passage 2 through which an operator can pass is provided, and a water main 3 having a diameter of 400 mm, for example, is also provided.

Reference numeral 4 denotes a concrete pavement plate laid on the U-shaped groove 1 to close the U-shaped groove 1. The concrete pavement plate 4 has a width substantially equal to the outer width of the upper portion of the U-shaped groove 1. Has a width of 3000 mm and a length of 200 in this example.
It has a thickness of 0 mm and a thickness of approximately 200 mm. In the concrete paving slab 4, a hot water pipe 6 made of polybutene pipe or stainless steel pipe is arranged in a meandering manner on a reinforcing bar 5 assembled in a plane lattice shape in a formwork (not shown) at a factory, and the concrete is placed in the formwork. And the rebar 5 and the hot water pipe 6 are embedded in the concrete paving slab 4, and the hot water pipe 6 is connected to the hot water pipe 6 via a connecting adapter 7.
Both stainless steel screw sockets 8 bent at 0 degrees are connected, and the connecting adapter 7 and both screw sockets 8 form a part of the hot water pipe 6, and both of which are pipe ends of the hot water pipe 6. A screw socket 8 projects downward from the back surface of the concrete paving slab 4. Further, as shown in FIG. 1, tiles such as granite tiles 9 are laid on the upper surface of the concrete paving slab 4. In this example, the concrete pavement plate 4 is laid in the U-shaped groove 1, and then the granite tile 9 is laid on the upper surface of the concrete pavement plate 4.

Supports 10 are provided in the U-shaped groove 1 at regular intervals in the longitudinal direction, and a hot water pressure feed pipe 11 and a drain pipe 12 connected to the hot water pipe 6 are arranged on the support 10 in parallel. The pipes 11 and 12 are each equipped with a saddle type branch plug 13 for diversion, and the branch plug 13 of the pressure feed pipe 11 has a ball valve 14 and a flow from the pressure feed pipe 11 to the hot water pipe 6. It is connected to a constant flow valve 15 that keeps the amount of warm water constant.
And the two screw sockets 8 on one side, which are the pipe ends of the hot water pipe 6, are connected by a flexible connecting pipe 16 made of stainless steel,
On the other hand, a ball valve 14 is connected to the branch plug 13 of the drainage pipe 12, and the ball valve 14 and the other two screw sockets 8 that are the pipe ends of the hot water pipe 6 are connected by a stainless connection pipe 16. Further, as shown in FIG. 3, warm water warmed by a heater 17 or warmed antifreeze liquid is pressure-fed by a pressure-feeding device 18 such as a pump to the pressure-feeding pipe 11, and the hot water flows in the hot-water pipe 6. The water is drained from the drain pipe 12 and circulated. 19 is a concrete paving plate 4
It is a lid provided on the
A worker can enter and leave the U-shaped groove 1 by using 20. Further, B in FIG. 1 is a roadway.

At the site, a concrete pavement slab 4 preformed in a factory is laid on the U-shaped groove 1 and two screw sockets 8 and 8 which are pipe ends protruding from the back surface of the concrete pavement slab 4 are installed. The granite tile 9 is laid on the upper surface of the concrete paving slab 4 which is connected to the pumping pipe 11 and the drainage pipe 12 via the connecting pipe 16 and the like. As a result, the concrete placing work for forming the concrete paved surface at the site is omitted, the site process is reduced, and the construction period is shortened. Then, at the time of use or inspection such as during the winter season, the lid 19 provided on one of the plurality of concrete pavement plates 4 is removed and the worker enters the U-shaped groove 1 Both ball valves 14 are opened to pass through the groove 1, and hot water warmed by the heater 17 or warmed antifreeze is flowed into the hot water pipe 6 to melt snow on the pavement surface. In addition, as a construction procedure, a concrete pavement slab 4 is laid, tiles are laid on the top surface of the concrete pavement slab, and then passage of the pavement surface is resumed. After that, piping work for the pressure feed pipe 11 and the drain pipe 12 in the U-shaped groove 1 Also, it is possible to perform a connection work between the hot water pipe 6 and the pressure feed pipe 11 and the drain pipe 12.

As described above, in this embodiment, the pavement plate is laid on the upper portion of the U-shaped groove 1 through which the inside can pass and forms a pavement surface. Since the hot water pipe 6 is buried and both screw sockets 8 which are the ends of the hot water pipe 6 are projected to the back surface of the paving slab 4, the precast concrete paving slab 4 molded at the factory is formed into the U-shaped groove 1. By installing the pipe end of the hot water pipe 6 which is laid on the upper part of the concrete pavement plate 4 and protrudes from the back surface of the concrete pavement plate 4 to the pumping pipe 11 and the drain pipe 12 which are piped in the U-shaped groove 1, a short construction time and low cost can be achieved. It is possible to obtain a pavement surface with a snow-removing function at a low construction cost. Further, since the pipe end of the hot water pipe 6 is provided in advance on the back surface of the concrete paving slab 4, it is possible to easily perform the connecting work with the pressure feed pipe 11 and the drain pipe 12 which are piped in the U-shaped groove 1. . Moreover, the pumping pipe 11 and the drainage pipe 12 for circulating the hot water can also serve as the U-shaped groove 1 which is a so-called common groove used for piping such as the mains 3 for water supply. The work of burying the pressure pipe 11 and the drain pipe 12 in the lower part of the
Also, since the piping work of the drain pipe 12 only needs to be done inside the U-shaped groove 1, the construction is easy. Further, it is not necessary to provide a lid for operating and inspecting the valve 14 and the like for each concrete paving slab 4, and the operator is provided with only one lid in a certain section.
It is possible to enter the U-shaped groove 1 from 19 places and to operate and inspect the valve 14 etc. through the U-shaped groove 1.

Further, as an effect of the embodiment, in construction, a concrete paving slab 4 is laid, tiles are laid on the upper surface of the concrete paving slab, and then passage of the paving surface is resumed. Since the piping work of 11 and the drainage pipe 12 and the connection work of the pumping pipe 11 and the drainage pipe 12 and the hot water pipe 6 can be performed, the passage can be restarted in a short period of time.
Further, when repairing the pavement surface, only the damaged concrete pavement plate 4 needs to be replaced, and the repair work can be performed in a short time and at a relatively low cost.

FIG. 5 shows a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. This is an example of using a U-shaped groove 1A suitable for being embedded in a U-shaped groove, which is a precast product that is pre-molded in the factory and has a U-shaped cross section. The wide part 21 is formed on the upper part of the side plate. For example, the outer width shown in the cross section of FIG. 5 is 5000 mm, the height is 2200 mm, the width of the wide part 21 is 450 mm, and the other thickness is 200 mm. Further, the length dimension is about 2000 to 2500 mm, and the reinforcing bar 22 in the longitudinal direction and sectional width direction in FIG. 5 in the U-shaped groove 1A, and a plurality of reinforcing bars in the longitudinal direction of the U-shaped groove 1A. 23 is embedded, and the corners and the wide portion 21 are made of PC steel over the entire length in the length direction. A duct 25 for inserting the material 24 is formed, and a step portion 27 for mounting both sides of the concrete paving plate 4A via a supporting material 26 such as rubber is formed inside the wide portion 21 thereof. . Further, in the concrete paving slab 4A manufactured at the factory, the ridges 28 are formed on both sides and the center of the lower surface over the entire length in the longitudinal direction, and the PC steel material 29 is inserted corresponding to the locations of these ridges 28. A duct 30 for is formed over the entire length in the lengthwise direction, and a reinforcing bar 31 in the cross-sectional direction and a reinforcing bar 32 in the lengthwise direction are embedded therein, and
Multiple PC steel materials 29 in the width direction of the concrete paving slab 4A
A is embedded, and a tension force is applied to the PC steel material 29A by a pre-tension method or a post-tension method, and a tension force is applied in the width direction of the concrete paving slab 4A. The width of the concrete paving slab 4A is 500
0 mm, length 2000-2500 mm, thickness 250
The thickness including the protrusions 28 is about 300 mm. Further, in the concrete paving slab 4A, as in the first embodiment, the hot water pipe 6 is embedded in a meandering shape, and the hot water pipe 6 is connected to the hot water pipe 6 via a connecting adapter 7.
Both stainless steel screw sockets 8 bent at 0 degrees are connected, and the connecting adapter 7 and both screw sockets 8 form a part of the hot water pipe 6, and both of which are pipe ends of the hot water pipe 6. The screw socket 8 is the concrete paving plate 4A.
It projects downward from the back of the. Further, a plurality of upper mounting holes 33 for mounting anchor bars are vertically formed on both sides of the concrete paving slab 4A, and lower mounting holes are formed in the step 27 of the U-shaped groove 1A corresponding to the upper mounting holes 33. 34 is formed, the anchor bar 35 made of steel or the like is loosely inserted into both mounting holes 33, 34, and the grout material 36 is filled in the mounting holes 33, 34 on the left side in the figure, and the width direction of the concrete paving plate 4A is determined. Both ends and U
A joint material 37 is filled between the groove 1A.

At the site, a plurality of U-shaped grooves 1A preformed at the factory are lined up and buried, and a PC steel material 24 is inserted into the ducts 25 of the U-shaped grooves 1A arranged in the lengthwise direction to make a plurality of tensions. The U-shaped groove 1A of 1 is tightly integrated. After that, the concrete paving slab 4A is laid along the step 27 of the U-shaped groove 1A via the support member 26, and at the same time, the upper and lower mounting holes 33, 34 are attached.
Anchor bar 35 is loosely inserted into the upper and lower mounting holes 33, 34 on one side.
Is filled with grout material 36, whereby the left side of the concrete paving slab 4A shown in the figure is fixed to the U-shaped groove 1A, and the right side of the figure is obtained by loosely inserting the anchor bar 35 into the upper and lower mounting holes 33, 34. The right side of 1A in the figure is movably attached. Further, the PC steel material 29 is inserted into the ducts 30 of the concrete paving slab 4A arranged in the lengthwise direction and tensioned, so that the plurality of concrete paving slabs 4A are tensioned and integrated. After that, the two screw sockets 8, 8 that are the pipe ends protruding on the back surface of the concrete paving slab 4A are connected to the pressure pipe 11 and the drain pipe 12 via the connecting pipe 16 and the like.
, Respectively, which eliminates the work of placing concrete to form the concrete paving surface at the site, reduces the number of site processes, and shortens the construction period. Then, when using or inspecting during the winter season, etc., the operator removes the lid 19 provided on one of the plurality of concrete paving slabs 4A, and enters the U-shaped groove 1A.
Both ball valves 14 are opened to pass through the groove 1A, and hot water warmed by the heater 17 or warmed antifreeze is flowed into the hot water pipe 6 to melt snow on the pavement surface. Although not shown, in the U-shaped groove 1A, as in the first embodiment, a water main, a telephone cable, a gas pipe, etc. are provided.

As described above, in the present embodiment, the pavement plate is laid on the upper portion of the U-shaped groove 1A through which the inside can pass and forms a pavement surface. This pavement plate is used as a concrete pavement plate 4A at the factory. Since the hot water pipe 6 is buried and both screw sockets 8 which are the ends of the hot water pipe 6 are projected to the back surface of the pavement plate 4A, the precast concrete pavement plate 4A molded at the factory is formed into the U-shaped groove 1A. By laying it on the upper part of the concrete paving slab 4A and connecting the end of the hot water pipe 6 protruding to the back surface of the concrete pavement slab 4A to the pumping pipe 11 and the drainage pipe 12 installed in the U-shaped groove 1A, a short construction time and low cost can be achieved. It is possible to obtain a pavement surface with a snow-removing function at a low construction cost. The hot water pipe 6
Since the end of the pipe is projected on the back surface of the concrete paving slab 4A in advance, it is possible to easily connect the pumping pipe 11 and the drainage pipe 12 arranged in the U-shaped groove 1A, and further It is not necessary to provide a lid for operation and inspection of the valve 14 or the like for each paving plate 4A, and the operator enters the U-shaped groove 1A from the lid 19 provided only at one location in a certain section and enters the U-shape. The valve 14 and the like can be operated and inspected through the groove 1A, and the same action and effect as those of the first embodiment can be obtained.

Further, as an effect of the embodiment, the duct 25 is formed in the U-shaped groove 1A in the longitudinal direction, and a plurality of U-shaped grooves 1A are formed on the PC.
The strength of the U-shaped groove 1A is increased by the tension integration by the steel material 24, and sufficient strength can be obtained even when a comparatively large load such as a wheel load is applied to the concrete paving slab 4A. Tension force is applied by the PC steel material 29A in the width direction of the concrete pavement slab 4A by the pre-tensioning method, and the duct 30 is formed in the lengthwise direction of the concrete pavement slab 4A. By integrating the tension in
The strength of the concrete paving slab 4A can be improved. Further, one side in the width direction of the concrete paving slab 4A is provided with a U-shaped groove 1A.
Even if a large concrete pavement slab 4A is formed in the width direction by fixing it to the other side and movably providing the other side, the movable other side can absorb a change in the width due to a temperature change or the like. Due to the thermal expansion and contraction of 4A, an unreasonable force does not act on the concrete pavement plate 4A and the U-shaped groove 1A, and the relatively large U-shaped groove 1A and the concrete paving plate 4A are satisfactorily combined to obtain a wide paved surface. be able to.

FIG. 6 shows a third embodiment of the present invention. The same parts as those in the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted. An example in which the water main 3 is arranged in the U-shaped groove 1A of the second embodiment is shown. The water main 3 is surrounded by a concrete frame 38, and the pump pipe 11 and the drain pipe are provided on the upper surface of the concrete frame 38. 12 are provided, and supports 39 and 39 are attached to the upper and lower sides on the inner surface on the left side in the figure, and various communication cables 40 and the like are provided via these supports 39 and 39. Also, in this example, a U-shaped groove 1A
Duct 25 through which PC steel material 24 for tension is also inserted in the center of the bottom surface of
Is formed over the entire length in the length direction.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, a hot water pipe is provided with both screw sockets and a pipe. Although the end is shown, the shape of the pipe end can be appropriately selected. For example, the polybutene pipe or the stainless pipe shown in the embodiment may be projected on the back surface of the concrete paving plate 4. Various patterns can be used as the piping pattern of the hot water pipe 6. Further, tiles 9 may be laid at the factory on the upper surface of the concrete paving slab 4 to form a tile-integrated precast concrete paving slab for road heating. Further, without laying tiles on the concrete paving slab 4, the surface of the concrete may be finished into a brushed concrete shape. Furthermore, a telephone cable or a gas pipe may be provided in the U-shaped groove instead of the water main, and at least one of the water main, the telephone cable, the gas pipe and the like may be provided. You may make it arrange | position. Further, the paved surface formed using the concrete paving slab of the present invention is not limited to the sidewalks shown in the examples, and may be a roadway, and may be a place other than the road, such as a park, a parking lot, or a place where people or vehicles pass. It can be applied anywhere. Further, as the PC steel material, an ampoule PC steel material coated with asphalt or tar or the like, or a post-tension PC steel material using a sheath or the like may be appropriately used because concrete does not adhere to the PC steel material.

[0019]

INDUSTRIAL APPLICABILITY The present invention is a paving plate which is laid on the upper part of a U-shaped groove through which the inside can pass and forms a paving surface. This paving plate is constructed by embedding a hot water pipe in a concrete paving plate. Providing a concrete pavement for road heating that is easy to construct and can shorten the construction period in order to obtain a pavement surface with a snow-removing function, in which the pipe end of the pipe is projected to the back surface of the pavement can do.

[Brief description of drawings]

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

FIG. 2 is an enlarged cross-sectional view of a main part showing the first embodiment of the present invention.

FIG. 3 is a partially cutaway plan view showing a first embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 5 is a sectional view showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 1,1A U-shaped groove 2 Passage 4,4A Concrete pavement plate 6 Hot water pipe 8 Both screw sockets (pipe end)

Claims (1)

[Claims] 1. A pavement slab having a pavement surface laid on an upper portion of a U-shaped groove through which the inside can pass, the pavement slab having a hot water pipe embedded in a concrete pavement and a pipe end of the hot water pipe. A precast pavement plate for road heating, wherein the precast pavement plate is formed by projecting on the back surface of the pavement plate.