JP3715225B2 - Paving material, paving body and paving method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pavement material in which soil and a solidifying material for solidifying the soil are mixed, and is installed in a state where the pavement material is solidified on the ground so as to exclusively use the specific properties of the pavement material. The present invention relates to a paving method in which the paving material is handled.
[0002]
[Prior art]
Conventionally, asphalt pavement has been widely used for pavements such as sidewalks, park roads, and roadways, but asphalt pavement has low water permeability, rainwater accumulates on the pavement surface during rainfall, and wets the feet of pedestrians. There are problems that are easy to make, and the pavement surface tends to have an inorganic finish, so there are problems with poor facial expressions.For example, in places where pavement with a natural atmosphere is required, in recent years, soil has been the main material. There is a tendency to use hardened soil pavement.
As shown in FIG. 5, a typical example of this soil pavement technique is a high-quality soil with relatively uniform grain size (referred to FIG. 4) called true sand soil (sandy soil formed by weathering granite). In the soil sieving test shown in the particle size accumulation curve reference 1), a pavement material h1 mixed with cement 2 is used. This pavement material h1 is laid on the ground G to a predetermined thickness, A pavement method of forming a pavement r1 by compaction was adopted.
That is, the pavement has a structure in which the pure sand soil is supported in a relatively coarse state by the cement component, and a water-permeable pavement that makes use of the texture of the pure sand soil is realized.
[0003]
[Problems to be solved by the invention]
As described above, the soil pavement can be finished to a pavement surface suitable for walking while taking advantage of the natural texture of the soil, but the resistance to wear by shoes and wheels is lower than that of asphalt pavement, and over time The present situation is that the soil is easily separated.
According to the above-mentioned conventional pavement technology, since the pure sand used as the main material is composed of particles having a uniform particle size as described above, the relationship between each particle is weak, for example, during rain Very easy to be washed away by rainwater. In other words, in the conventional pavement technology using soil having such properties, the soil particles are likely to be separated and washed away from the pavement, and the surface of the pavement becomes uneven or a groove is formed in the trace of the soil. There is a problem that the deterioration of the pavement surface is likely to become severe.
[0004]
Accordingly, an object of the present invention is to provide a pavement technique capable of solving the above-described problems and forming a highly durable pavement while taking advantage of the texture of the soil.
[0005]
[Means for Solving the Problems]
As illustrated in FIG. 1, the characteristic configuration of the invention of claim 1 is a pavement material in which soil 1 and a solidifying material 2 for solidifying the soil 1 are mixed, and the soil 1 and the solidifying material 2 are integrated. and solidifying grains 4 solidified granulated, the soil 1, and there and said solidifying material 2, where the uniformity coefficient is are mixed in 10 or more states.
[0006]
According to the characteristic configuration of the invention of claim 1, the solidified particles obtained by solidifying the soil and the solidified material into a single granular form are mixed together with the soil and the solidified material. The size of the pavement as a whole becomes a mixture in which the solidified material, the soil particles, and the solidified particles are mixed.
Therefore, compared to the particle size distribution of the soil particles alone, the solidified particles are mixed together, the particle size distribution width of the constituent particles is widened, and the strength of the engagement of each particle (sand flow resistance) can be increased. It becomes possible to make the pavement difficult for each particle to be washed away by water.
As a result, unevenness and grooves are less likely to occur on the pavement surface, and the durability of the pavement can be improved.
[0007]
According to a second aspect of the present invention, the soil 1 is a pure sand soil.
[0008]
According to the characteristic configuration of the invention of claim 2, in addition to being able to achieve the function and effect of the invention of claim 1, the unique and natural texture provided by the true sand soil is effectively utilized for the finish of the pavement surface. It becomes possible. Moreover, since the place of origin is a kind of soil that is widely present nationwide, it is easy to obtain and it is possible to proceed with pavement work at a low cost by reducing the cost of materials.
[0009]
The characteristic configuration of the invention of claim 3 is that the solidified particles 4 have a maximum particle size set larger than the maximum particle size of the soil 1.
[0010]
According to the characteristic configuration of the invention of claim 3, in addition to being able to achieve the operational effect of the invention of claim 1 or 2, the maximum particle size of the particles constituting the pavement is determined by the soil particles alone. Compared with what comprised this, the thing which mix | blended the solidified grain becomes large, and the whole particle diameter distribution width | variety of a pavement can be made wide. In other words, there are particles of various sizes in the pavement, from larger particles to smaller particles, with the middle particles located between the larger particles and the smaller particles between the middle particles. In other words, other particles enter between the particles, and this engagement structure makes it difficult for each particle to easily move. That is, it becomes easy to prevent each particle from being easily washed away by rainwater, and it is difficult to form irregularities and grooves on the pavement surface, thereby improving durability as pavement.
[0011]
As illustrated in FIG. 1, the characteristic configuration of the invention of claim 4 is a pavement in which a pavement mainly composed of soil 1 is solidified on the ground G, and the pavement is claimed in claim 1. It is in the place which is a pavement material as described in any one of 1-3.
[0012]
According to the characteristic configuration of the invention of claim 4, it is possible to form a pavement having the function and effect of any one of claims 1 to 3.
That is, in the pavement using the pavement material according to the invention of the first aspect, unevenness and grooves are less likely to occur on the pavement surface, and the durability of the pavement can be improved.
Moreover, in the paving body using the paving material according to the invention of claim 2, the unique and natural texture provided by the pure sand soil can be effectively utilized for the finishing of the paving surface, and the paving work can be carried out at a low cost by reducing the cost related to the material. It is possible to proceed.
Moreover, in the pavement using the pavement material according to the invention of claim 3, it is easy to form an engagement structure in which other particles enter between the particles, and it is easy to prevent each particle from being easily washed away by rainwater. It becomes possible to improve the durability as a pavement.
[0013]
The characteristic means of the invention of claim 5 is, as illustrated in FIG. 1, after separating the pavement r <b> 1 obtained by solidifying the soil 1 with the solidifying material 2 from the ground G, it is pulverized into granules and processed into solidified grains 4, A pavement material h2 having a uniformity coefficient of 10 or more including a mixture of the solidified grains 4 and the solidified material 2 is laid on the ground G, and the pavement material h2 is compacted to form a pavement r2. .
[0014]
According to the characterizing means of the invention of claim 5, since the existing pavement obtained by solidifying the soil with the solidifying material is processed into a solidified particle by pulverizing it into a granular shape, the solidified particle itself is composed of the soil and the solidified material in an integral granular form. It is easy to exhibit the form of the solidified grain, and it is possible to form a solidified grain having a larger diameter than a single particle of the soil and having a natural texture of the soil. In addition, in the process of crushing the pavement, naturally, small pulverized particles are also generated, so as a whole pavement material, the particle size distribution width of the constituent particles becomes wider than that of soil alone pavement, The strength of particle engagement (sand flow resistance) can be increased, and it becomes possible to form a pavement in which each particle is less likely to flow into water. As a result, unevenness and grooves are less likely to occur on the pavement surface, and the durability of the pavement can be improved.
In addition, since the solidified grains are made from the existing pavement that has been treated as waste in the past, the waste disposal cost can be omitted, and new soil is completely removed. Instead of using as a paving material, it is possible to reduce the material cost by using the solidified grains as a recycled material, and it is possible to reduce the cost of the entire paving work.
[0015]
The characteristic means of the invention of claim 6 is that, as illustrated in FIG. 1, the pavement material h <b> 2 is a mixture of the solidified grains 4, the solidified material 2, and the soil 1.
[0016]
According to the characteristic means of the invention of claim 6, in addition to being able to achieve the function and effect of the invention of claim 5, it becomes possible to form a pavement that makes better use of the natural texture of the soil. .
[0017]
The characteristic means of the invention of claim 7 is that the soil 1 is a pure sand soil.
[0018]
According to the characteristic means of the invention of claim 7, in addition to being able to achieve the function and effect of the invention of claim 5 or 6, the unique and natural texture provided by the true sand soil is effective for finishing the pavement surface. It is possible to make use of it. Moreover, since the place of origin is a kind of soil that is widely present nationwide, it can be easily obtained at a low cost, and the cost for materials can be further reduced.
[0019]
The characteristic means of the invention of claim 8 is that the solidified particles 4 have a maximum particle size set larger than the maximum particle size of the soil 1.
[0020]
According to the characterizing means of the invention of claim 8, in addition to being able to achieve the function and effect of any of the inventions of claims 5 to 7, the maximum particle size of the particles constituting the pavement is earth particles alone Compared with the structure of the pavement, the mixture of solidified grains is larger, so that the overall particle size distribution width of the pavement can be widened. In other words, there are particles of various sizes in the pavement, from larger particles to smaller particles, with the middle particles located between the larger particles and the smaller particles between the middle particles. In other words, other particles enter between the particles, and this engagement structure makes it difficult for each particle to easily move. That is, it becomes easy to prevent each particle from being easily washed away by rainwater, and it becomes possible to form a highly durable pavement in which unevenness and grooves are hardly formed on the pavement surface.
[0021]
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.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
FIG. 5 shows a sidewalk R before the pavement technique of the present invention is applied. The sidewalk R is formed on a pavement foundation G1 formed by compacting the ground G by means of rolling or the like. Equivalent) 1 and pavement material h1 containing cement (corresponding to solidified material) 2 are laid in a well-mixed state, sprayed with water 3 and rolled (rolled by a ridge or a rolling roller) and tightened By solidifying, the pavement r1 in a state where the sandy sand 1 is supported by the cement 2 is formed. A so-called sand sand pavement is applied to the sidewalk R.
[0024]
Since this true sandy soil pavement is finished in a state in which the particles of the true sandy soil 1 are exposed on the surface, it can have a natural texture.
FIG. 5 schematically shows the particle structure of the pavement r1. As will be understood, the true sand soil 1 described in the embodiment has a relatively uniform size of each particle, and shows a small value of about 5 to 6 when expressed by the uniformity coefficient Uc.
The uniformity coefficient Uc is a numerical value representing the uniformity of the particle size, and is obtained from the particle size accumulation curve (see FIG. 4) obtained by the soil sieving test. The soil particles of various particle sizes are mixed, and the smaller the value, the greater the uniformity of the particle size.
[0025]
[Expression 1]
Uc = D ₆₀ / D ₁₀
Uc ..... Uniformity coefficient D ₆₀ ..... Particle size D ₁₀ corresponding to 60% by weight in the particle size accumulation curve .... Particle size corresponding to 10% by weight in the particle size accumulation curve. ]
Next, FIG. 1 shows a sidewalk R to which the pavement technique of the present invention is applied. The sidewalk R is a modified pavement r1 formed by the above-described conventional pure sand soil pavement to form a new pavement r2. It is.
[0027]
Below, the formation procedure of the new pavement r2 is demonstrated.
[1] After separating the old pavement r1 obtained by solidifying the pure sand soil 1 with the cement 2 from the ground G, the lump-like separated pieces are pulverized by the pulverizer 3 to form the solidified solid particles 4 (FIG. 2).
[2] The solidified particles 4 are transferred to a mixing device 5 to adjust the particle size, and mixed with cement 2 (adding new pure sand soil if necessary) to form a new paving material h2 (see FIG. 3). .
[3] On the pavement base G1 formed by compacting the ground G by means of rolling or the like, the pavement material h2 is laid in a predetermined thickness in a well-mixed state, sprayed with water, Then, a new pavement r2 is formed by compacting with a rolling roller or the like (see FIG. 3).
[0028]
The new pavement thus formed is finished in a state in which the particles of the true sand soil 1 are exposed on the surface in the same manner as the true sand soil pavement before renovation, and thus can have a natural texture.
FIG. 1 schematically shows the particle structure of the pavement r2. As will be understood from this, the pavement material h2 includes particles such as solid particles 1a of the pure sand soil 1 and solidified particles 4 in which the cement 2 is solidified integrally with the soil particles 1a of the pure sand soil 1, Depending on the difference in the degree of pulverization by the pulverizing device 3 and the mixing device 5, those having various particle sizes from large particles to small particles exist. The pavement material h2 of the pavement r2 described in the embodiment has irregular particle sizes, and as shown in the figure, it is easy to adopt an engagement structure in which small particles enter a gap between large particles. It is formed in a state that is difficult to flow. When represented by the uniformity coefficient Uc, a large value of 10 or more is shown.
And the pavement r2 which consists of these wide particle size distribution is supported in the state which maintained the above-mentioned engagement structure of each particle | grain with hardening of the cement 2. As shown in FIG.
[0029]
The pulverizing apparatus 3 will be described. As shown in FIG. 2, a movable pulverizing apparatus main body 6 having a crawler 6a is provided. The crushing part 6c which crushes the crushing object thrown into 6b and makes it a fine granule, and the conveyor 6d which can carry out the granule crushed by the crushing part 6c from the crushing apparatus main body 6 are provided. . And between the said hopper 6b and the grinding | pulverization part 6c, the slipper removal mechanism which drops the fine-grain part in a crushing target object on the conveyor 6c is provided.
Accordingly, when the bulk separated piece of the old pavement r1 that is the object to be crushed is put into the hopper 6b, the fine particles are dropped directly onto the conveyor 6d by the slipping mechanism, and the massive separated piece to be crushed becomes, It is sent to the crushing part 6c and crushed. Then, the solidified grains 4 that have been crushed into grains are sent out to the mixing device 5 by the conveyor 6d in the same manner as the fine grains. Incidentally, although explanation is omitted, the crushing part 6c employs the same mechanism as a known crushing device that crushes this kind of crushing object.
Note that the target crushing dimensions can be set in advance by the crushing device body 6.
[0030]
The mixing device 5 will be described. As shown in FIG. 3, a movable mixing device main body 7 having a crawler 7a is provided, and on the mixing device main body 7, the solidified particles 4 can be charged freely. 7b, a second hopper 7c that can be charged with cement 2 for solidification, a mixing part 7d that can mix the solidified grains 4 from the first hopper 7b and the cement 2 from the second hopper 7e at a set ratio, A pavement material h2 mixed in the part 7d is provided with a conveyor 7e that can be carried out of the mixing device body 7. Between the hoppers 7c and 7e and the conveyor 7e, there is provided a mixing adjusting mechanism 7f capable of adjusting the particle size while mixing the solidified particles 4.
Therefore, when the solidified particles 4 to be mixed are put into the first hopper 7b, the cement 2 and the solidified particles 4 stored in advance in the second hopper 7c are respectively sent to the mixing unit 7d and paved. Mixed as material h2. Then, the pavement material h2 is sent to the mixing adjustment mechanism 7f, stirred, and finally subjected to particle size adjustment, and sent to the pavement target portion by the conveyor 7e.
In addition, the blending amount and the maximum particle size of the target pavement material h2 can be set in advance by the mixing device body 7. In the embodiment, the maximum particle size of the pavement material h2 is set to be larger than the maximum particle size of the true sand soil 1.
[0031]
According to the pavement technique of the present embodiment, the pavement that is supposed to be discarded should be crushed and regenerated into the solidified grains 4, thereby reducing the cost of the pavement work. While maintaining the texture of the pavement, it was possible to improve the performance of the pavement and make it a highly durable pavement.
[0032]
[Another embodiment]
Other embodiments will be described below.
[0033]
<1> The soil is not limited to the true sand soil described in the previous embodiment, and may be other soil. In short, any material that can reflect the natural texture of the soil in the pavement may be used.
<2> The pavement material is not limited to the composition composed of the solidified grains 4 and the solidified material 2 described in the previous embodiment. For example, a new soil is added, or calcium silicate which is a hardening component of cement. Further, a water-permeable soil hardening admixture mainly composed of calcium carbonate and quartzite powder that acts on calcium compounds such as calcium aluminate to increase water permeability, or other admixtures may be added. Further, the solidifying material is not limited to cement, and may be a material that can form a self-hardening binder component.
<3> The pavement method is not limited to using each facility described in the previous embodiment, but may be changed to a device with a different specification or performed manually without using a device. May be. In addition, regarding the mixing of water with the pavement material, as described in the previous embodiment, instead of the method of spraying after arranging the pavement material on the ground, in advance, after mixing the pavement material and water, The method of arrange | positioning them on the ground may be sufficient, Furthermore, you may use both methods together.
[Brief description of the drawings]
[Fig. 1] Schematic diagram showing the pavement situation [Fig. 2] Side view partially cut away sectional view showing the crushing device [Fig. 3] Side view partially cut away sectional view showing the mixing device [Fig. Diagram explaining radial accumulation curve [Fig. 5] Schematic diagram showing conventional pavement situation [Explanation of symbols]
1 soil 2 solidified material 4 solidified grain G ground h2 pavement material r1 pavement r2 pavement

Claims (8)

A pavement material in which soil and a solidifying material that hardens the soil are mixed,
And solidifying grains and the solidifying material and the soil is solidified integrally particulate, the soil, and, paving materials and the solidifying material, uniformity coefficient is are mixed in a state of 10 or more.   The pavement according to claim 1, wherein the soil is pure sand soil.   The paving material according to claim 1 or 2, wherein the solidified particles have a maximum particle size set larger than the maximum particle size of the soil. It is a pavement that is installed on the ground in a state where the pavement material mainly composed of soil is hardened,
The pavement which the said pavement is a pavement as described in any one of Claims 1-3. After the pavement made of solidified solidified material is separated from the ground, it is crushed into particles and processed into solidified particles, and a pavement material having a uniformity coefficient of 10 or more including a mixture of the solidified particles and the solidified material is obtained. A paving method for laying on the ground and compacting the paving material to form a paving body.   The pavement method according to claim 5, wherein the pavement material is a mixture of the solidified particles, the solidified material, and the soil.   The pavement method according to claim 5 or 6, wherein the soil is pure sand soil.   The pavement method according to any one of claims 5 to 7, wherein the solidified particles have a maximum particle size set larger than a maximum particle size of the soil.

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