JP2004092304A - Form unit for constructing road and constructing method for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a base material from infiltrating into an adjacent soil even when the bed material including a toxic material is used and provide a road construction method using a form unit for constructing the road capable of easily constructing a road structure in which the management of the base material is controlled in an unified way and the road construction method using the form unit are provided. <P>SOLUTION: The form unit for constructing a road has a side wall part having substantially the same height with the depth of the bed to be obtained and the bottom receiving the bottom of the bed and provided with a pair of side members disposed while positioning the bottom side oppositely and at least one bottom member arranged so as to form the above mentioned bottom together with the bottom of both side members. The side members and the bottom member are assembled and the upper opening frame having an inner sectional face with a sectional shape of the bed is freely formed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a road construction frame unit and a road construction method.
[0002]
[Prior art]
Generally, garbage discharged from households is incinerated at garbage incineration sites of local governments, etc., and disposed of at landfill disposal sites. There are also problems such as elution of harmful components.
Then, the inventor of the present invention uses the method of removing dioxins and heavy metals by further treating the incinerated ash (see Japanese Patent Application Laid-Open No. 2001-132930) to convert the roasting furnace ash into a solidified material for a roadbed. (Japanese Patent Application No. 2001-373640).
That is, the present invention uses a roasting furnace ash obtained by rendering incinerated ash harmless as a solidifying material, thereby effectively utilizing the incinerated ash that has been conventionally disposed of by landfill, thereby eliminating waste of resources and landfill disposal. The enormous costs of securing land are no longer necessary.
In addition, if the roasting furnace ash is used, a solidified roadbed can be formed only by compaction. In addition, since it is not mortared, excavation at the time of repair or the like can be easily performed, and the excavated roadbed material can be reused as civil material for the roadbed.
[0003]
By the way, in the case of the above roasting furnace ash, it is detoxified as described above, and sufficient safety is secured under current environmental standards, but harmful components are mixed due to human error and the like. However, there is no guarantee that there is no possibility that these harmful components are eluted by rainwater or the like soaked into the roadbed and contaminate nearby soil.
It is also conceivable that even the above-mentioned roasting furnace ash, which can be used now because the environmental standards have been revised, will need to be collected.
However, once laid as a roadbed material, even if the roadbed material is to be recovered, it is mixed with the existing soil, so that the surrounding soil must be recovered in excess, resulting in a large loss.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and even when a roadbed material containing a harmful substance is used, the roadbed material is not mixed into adjacent soil, and the roadbed material is centrally managed. It is an object of the present invention to provide a frame unit for road construction that can easily construct a road structure that can be constructed, and a road construction method using the frame unit.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the road construction frame unit according to claim 1 of the present invention (hereinafter referred to as "the unit of claim 1") is substantially the same as the depth direction of the roadbed to be obtained. A pair of side members having a side wall portion having a height and a bottom portion for receiving the bottom of the roadbed portion, and being arranged so as to form the bottom together with a pair of side members arranged with the bottom sides facing each other, and the bottom portions of both side members. At least one bottom member, wherein the both side members and the bottom member are assembled to form a frame of an upper opening having an inner cross-section of a roadbed section.
[0006]
The frame unit for road construction according to claim 2 of the present invention (hereinafter referred to as “unit of claim 2”) is a unit according to claim 1, wherein the side member and the bottom member are made of recycled material or waste as aggregate. It is characterized by being a concrete molded product containing.
[0007]
The frame unit for road construction according to claim 3 of the present invention (hereinafter referred to as “unit of claim 3”) is the unit of claim 1 or claim 2, wherein the side member is provided at the lower end of the side wall portion. It is characterized by having a drainage channel leading to the outside of the frame.
[0008]
The road construction frame unit according to claim 4 of the present invention (hereinafter referred to as “the unit of claim 4”) is a unit according to any one of claims 1 to 3, wherein the side member is formed of a side wall portion. It is characterized in that it is provided with a collapse prevention member which is detachably attached to the outer wall surface and is provided along the outer wall surface to prevent collapse of the embankment.
[0009]
According to a fifth aspect of the present invention, there is provided a road construction method comprising the steps of: assembling the unit according to any one of the first to fourth aspects to form a frame at a road construction position; Forming a roadbed portion in the frame by filling and compacting through an opening.
[0010]
In the present invention, examples of the material of the side member and the bottom member include reinforced concrete, glass fiber reinforced resin, and wood material. A concrete molded product containing a recycled material or a waste as an aggregate as in the unit of claim 2 is used. Is preferred. That is, by using the recycled material, it is possible to reduce the waste disposal cost of the waste and to reduce the manufacturing cost of the side member and the bottom member.
[0011]
Examples of the recycled material include, but are not particularly limited to, recycled crushed stone, crushed concrete, asphalt crushed material, recycled products such as recycled crusher run, and molten slag.
[0012]
The roasting furnace ash contained in the roadbed material is more preferably a roasting furnace ash containing 15% by weight or more (more preferably 20% by weight or more) of calcium oxide.
That is, when calcium oxide is contained, the strength of the roadbed increases over time due to the action of calcium oxide, but if the content of calcium oxide is less than 15% by weight, the effect becomes insufficient. .
[0013]
Further, the roadbed portion is not particularly limited. For example, when the roadbed portion is formed from three layers of a road body, a lower roadbed, and an upper roadbed in order from the lower side, the composition of the material used for each layer is different. In the case of the upper subbase, a subbase material obtained by mixing roasting furnace ash containing 15% by weight or more of calcium oxide, coarse aggregate, fine aggregate, and water is preferably used.
The mixing ratio of the roasting furnace ash, the coarse aggregate, and the fine aggregate is not particularly limited, but is 1.0 to 2.5: 0.5 to 1.5: 0.3 by volume ratio. It is preferable to mix at a ratio of 1.0 to 1.0, more preferably 1.5 to 2.5: 0.75 to 1.25: 0.3 to 0.7, and 2.0: 1.0: 0.5 is more preferred.
[0014]
The above-mentioned coarse aggregate has a particle size of 3 mm to 40 mm, preferably 5 mm to 15 mm, and the fine aggregate has a particle size of less than 3 mm, preferably 0.1 mm to 2 mm.
Coarse aggregates and fine aggregates are not particularly limited, for example, as coarse aggregates, recycled products such as gravel, recycled crushed stone, crushed concrete, crushed asphalt, recycled crusher run, molten slag, and the like, Examples of the fine aggregate include sand, molten slag, and the like, and a crushed stone in which a coarse aggregate having a large particle size serving as a coarse aggregate and a fine aggregate having a fine particle size serving as a fine aggregate are mixed may be used.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.
FIG. 1 to FIG. 3 show a first embodiment of a road construction frame unit according to the present invention.
[0016]
As shown in FIG. 1, the road construction frame unit (hereinafter, simply referred to as “unit”) 1a includes a reinforced concrete side member 2a containing recycled material as an aggregate, a first bottom member 3, and a second bottom member. And a bottom member 4.
As shown in FIGS. 1 to 3, the side member 2 a has a side wall 21 having substantially the same height as the depth of the roadbed to be obtained, and a lower end of the side wall 21, which is orthogonal to the side wall 21. And a pedestal portion 22 provided so as to have a substantially inverted T-shaped cross section.
[0017]
The side wall portion 21 has a groove receiving portion 23 and a collapsing prevention member 24 which can be freely attached and detached via bolts and nuts on its outer wall surface, and the inner wall surface at the upper end portion of the side wall portion 21 is cut out in a stepwise manner. A first drain hole 25 is formed at a position facing the side groove 9 at the center of the notch 21a. A vertical drain groove 26 is formed in the center of the inner wall surface of the side wall 21.
[0018]
One of the pedestal portions 22 is a bottom portion 27 that forms a part of a bottom for receiving a roadbed portion described later with the side wall portion 21 interposed therebetween.
On the upper surface of the portion of the pedestal portion 22 protruding outside the frame A, a ridge 22a for preventing collapse is provided.
[0019]
The bottom portion 27 is provided with a horizontal drain groove 28 along a corner with the side wall portion 21, and a drain portion of the horizontal drain groove 28 directly below the first drain hole 25, which drains outside a frame A described later. A second drain hole 29 is formed with a downward slope toward the outside as a road. At the end of the bottom 27, an engaging portion 27a having an engaging ridge 27b on its upper surface is provided.
Although the first drain hole 25, the second drain hole 29, the vertical drain groove 26, and the horizontal drain groove 28 are filled with the permeable filler 12, liquid such as rainwater is drained smoothly. Materials are not discharged.
[0020]
The first bottom member 3 is provided with a first engaging portion 32 at one end in the width direction of the main body 31 and a second engaging portion 33 at the other end of the main body 31. The first engaging portion 32 is disposed so as to overlap with the engaging portion 27a of the bottom portion 27 from above, and a groove 32a into which the engaging ridge 27b is fitted is formed on the lower surface. On the other hand, the second engaging portion 33 has the same structure as the engaging portion 27a.
The second bottom member 4 is provided with engaging portions 42 on both sides in the width direction of the main body 41.
[0021]
The engaging portion 42 has the same structure as the first engaging portion 32, and is disposed so as to overlap the second engaging portion 33 of the first bottom member 3 or the engaging portion 27 a of the bottom 27 from above. It has become.
The side member 2a, the first bottom member 3, and the second bottom member 4 each have a first connection overlap portion 20a at one end in the longitudinal direction, and the first connection overlap portion 20a at the other end, as shown in FIG. And a second connection overlapping portion 20b overlapping with the second connection overlapping portion 20b. In other words, the first member 20a is overlapped with the second connection member 20b of the adjacent side member 2a (the first bottom member 3 and the second bottom member 4) so that the inner member becomes flat. 2a, the first bottom member 3 and the second bottom member 4 can be connected in the longitudinal direction of a frame A described later.
[0022]
By using the unit 1a, for example, a road R can be constructed as follows.
(1) At the predetermined position of the road construction ground G, the bottom 27 of the two side members 2a faces each other, and the width of the roadbed portion 6 at which the interval between the side wall portions 21 is to be obtained is set. Deploy.
[0023]
(2) After laying the first bottom member 3 on the road construction ground G such that the first engagement portion 32 of the first bottom member 3 is engaged with the engagement portion 27a of the bottom 27 of the one side member 2a. And the second bottom member so that both engagement portions 42 of the second bottom member 4 engage with the second engagement portion 33 of the first bottom member 3 and the engagement portion 27a of the bottom portion 27 of the other side member 2a, respectively. 4 is laid on the road construction ground G, and a frame A having an upper opening is assembled.
(3) If necessary, the side member 2a, the first bottom member 3, and the second bottom member 4 are similarly formed in the longitudinal direction of the frame A while the first connection overlap portion 20a and the second connection overlap portion 20b are overlapped. To extend the frame A one after another.
[0024]
(4) Side member 2a and side member 2a, first bottom member 3 and first bottom member 3, overlapping portion of second bottom member 4 and second bottom member 4, side member 2a and first bottom member 3, first member The caulking material 7 is filled into the engagement portions between the bottom member 3 and the second bottom member 4 and between the second bottom member 4 and the side member 2a.
(5) At the bottom of the frame A, an invert 61 which is a water-impermeable layer having a slope descending from the center in the width direction of the frame A toward the corner between the side wall 21 and the bottom 27 of the side member 2a is laid. .
[0025]
(6) The road ash 62 is formed by compacting furnace ash, construction sludge, construction waste soil, and the like on the invert 61.
(7) A roadbed obtained by mixing a roasting furnace ash containing 15% by weight or more of calcium oxide on a road body 62, recycled crushed stone as coarse aggregate, molten slag as fine aggregate, and water. The material is compacted to form the roadbed 63.
[0026]
(8) The non-permeable layer 64 is formed on the roadbed 63 by asphalt or concrete.
(9) Apply the water-permeable pavement 65 on the water-impermeable layer 64.
[0027]
(10) With the groove receiving portion 23 and the collapse prevention member 24 fixed to the outer wall surface of the side wall portion 21, the embankment 8 is applied so as to form a slope along the outer wall surface of the side wall portion 21. The U-shaped side groove 9 is received on the portion 23.
(11) If necessary, plant plants on the embankment 8 and lay the sidewalk WR.
[0028]
As described above, the unit 1a simply forms the frame A in which the inside of the upper opening has the cross-sectional shape of the roadbed section 6 simply by combining the side member 2a, the first bottom member 3, and the second bottom member 4. can do.
Then, if the roadbed material is filled in the frame A and compacted, the roadbed material can be easily compacted because the periphery is surrounded by the frame A.
[0029]
Further, since the side member 2a, the first bottom member 3, and the second bottom member 4 are made of reinforced concrete containing recycled material or waste as aggregate, the production cost can be reduced, and the processing cost such as landfill of waste can be reduced.
Further, since the side member 2a has the first drain hole 25, the vertical drain groove 26, the horizontal drain groove and the second drain hole 29, the water that has entered the frame A is smoothly drained out of the frame A. it can. In addition, since the first drain hole 25, the vertical drain groove 26, the horizontal drain groove, and the second drain hole 29 are filled with the water-permeable filler 12, the roadbed material filled in the frame A is filled. It does not flow out of the frame A. That is, only water is discharged.
[0030]
On the other hand, according to the road construction method using the unit 1a, the roadbed material containing waste such as roasting furnace ash and molten slag, which has been conventionally landfilled, is filled in the frame A formed by combining the units 1a. Since the roadbed portion 6 is formed by pressing and compacting, it is not necessary to secure a land for landfill disposal of waste as described above. In addition, not only can the roasting furnace ash and the molten slag etc. be used effectively, but also the roasting furnace ash and the molten slag can be thoroughly managed because they are used in roads where public management is possible. That is, the roadbed material containing the above-described roasting furnace ash does not mix with the adjacent soil. Therefore, even if it is found that a harmful substance or the like is contained in the roadbed material and it is necessary to dig up and remove it, only the roadbed material in the unit 1a can be easily and reliably removed. That is, the waste can be safely and effectively used in a state where the waste is centrally managed so as not to spread to other places.
[0031]
In addition, since the roasting furnace ash is used in the roadbed material, a strong roadbed can be formed only by compacting the roadbed material, and since it does not become mortar, the roadbed excavation at the time of road surface repair, etc. can be easily performed. Can be reused as roadbed material.
In addition, since the impermeable layer 64 is provided above the roadbed 63, rainwater does not normally penetrate into the frame A, but cracks and the like enter the impermeable layer 64, and Even if it enters, it can be smoothly drained out of the frame A via the vertical drain 26, the horizontal drain and the second drain 29.
[0032]
Further, even if harmful substances are eluted from the roasting furnace ash or the molten slag in the roadbed section 6, a plant is planted on the embankment 8, and the harmful substance, which is impregnated by the plant into the embankment 8, for example, heavy metal. Is sucked and chelated in the plant to detoxify it. Organic compounds are decomposed and detoxified by rhizobia or the like attached to plant roots.
In addition, it is preferable that both ends in the longitudinal direction of the frame A be closed with a water-blocking lid-like material, a concrete block, or the like.
[0033]
FIG. 5 shows a second embodiment of a road construction frame unit according to the present invention.
As shown in FIG. 5, in this unit 1b, the side member 2b has a substantially L-shaped cross section, the existing ground G is dug in a groove shape, and the side member 2b is Except that the frame B is formed using the first bottom member 3 and the second bottom member 4, it is the same as the above-described embodiment.
[0034]
Note that the present invention is not limited to the above embodiment. For example, the unit 1a has two bottom members, but may have one bottom member or three or more bottom members.
In the above embodiment, the concrete invert 11 is laid at the bottom of the frame A, but the invert 11 may be made of rubber or synthetic resin.
[0035]
Further, in the above embodiment, the water-permeable filler 12 is previously filled in the first drain hole 25, the second drain hole 29, the vertical drain groove 26, and the horizontal drain groove 28. It may be filled at the time of construction.
Further, the road construction frame unit and the road construction method road structure of the present invention can be used not only for new roads but also for gradually changing existing road structures at the time of road repair.
[0036]
【The invention's effect】
Since the road construction unit according to the present invention is configured as described above, when a roadbed material containing a harmful substance is used, a road where the roadbed material is not mixed with the adjacent soil can be easily formed. Can be built.
[0037]
According to the unit of the second aspect, the manufacturing cost of the unit can be reduced, and the cost of treating waste can be reduced.
According to the unit of the third aspect, the roadbed material in the frame does not flow out due to rainwater or the like that has entered the frame.
[0038]
According to the unit of the fourth aspect, when the slope is formed along the road by the embankment, the collapse of the embankment can be prevented. That is, the slope forming operation can be performed safely and quickly.
[0039]
On the other hand, the road construction method according to the present invention can solve the landfill disposal problem by effectively utilizing the roasting furnace ash generated in various places as described above, and can be eluted in the roadbed material. Even if various harmful substances are contained, these harmful substances do not pollute the soil and water system around the road, and can be highly safe.
In addition, since the waste is used in a place such as a road where public management is possible, the waste such as roasting furnace ash and molten slag can be centrally managed, and the waste can be prevented from flowing out to another place. Further, even in the event that recovery is necessary, the waste does not mix with the surrounding soil, so that only the necessary parts can be reliably recovered, and the cost can be minimized.
[0040]
In addition, since the roasting furnace ash is used in the roadbed material, a strong roadbed can be formed only by compacting the roadbed material, and since it does not become mortar, it is easy to excavate the roadbed when repairing the road surface. Can be reused as roadbed material.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a construction state of a road construction frame unit according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of the road construction frame unit of FIG. 1;
FIG. 3 is a view in the direction of arrow X in FIG. 2;
FIG. 4 is a view as seen in the direction of the arrow Y in FIG. 1;
FIG. 5 is a sectional view showing a construction state of a road construction frame unit according to a second embodiment of the present invention.
[Explanation of symbols]
1a, 1b Road Construction Frame Units 2a, 2b Side Member 3 First Bottom Member 4 Second Bottom Member 6 Subbase 8 Fill 12 Filler 21 Side Wall 24 Collapse Prevention Member 27 Bottom 29 Second Drainage Hole (Drainage Channel)
A, B Frame G Ground (Road construction position)

Claims (5)

A pair of side members having a side wall portion having substantially the same height as the depth direction of the roadbed portion to be obtained and a bottom portion receiving the bottom of the roadbed portion, and a pair of side members arranged so that the bottom side faces each other; At least one bottom member disposed so as to form the bottom together with the bottom of the member, and the side member and the bottom member are assembled to form a frame of an upper opening having an inner cross-section of a roadbed portion. A frame unit for road construction, which is free. The road construction frame unit according to claim 1, wherein the side member and the bottom member are concrete molded products including a recycled material or a waste as an aggregate. The road construction frame unit according to claim 1 or 2, wherein the side member includes a drainage channel communicating with the outside of the frame at a lower end portion of the side wall portion. The road construction according to any one of claims 1 to 3, wherein the side member includes a collapse preventing member which is detachably attached to an outer wall surface of the side wall portion and is provided along the outer wall surface to prevent collapse of the embankment. Frame unit. A step of assembling the frame unit for road construction according to any one of claims 1 to 4 to form a frame at a road construction position, and filling and compacting a roadbed material including a roasting furnace ash from an upper opening. Forming a roadbed portion inside the road.

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