JP2010163769A - Step preventive construction method and structure for paved road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step preventive construction method for a paved road for constructing the paved road easily and maintaining satisfactory functions of the road even if the ground is deformed due to an earthquake or the like. <P>SOLUTION: In this step prevention construction method for the paved road constituted by stacking a roadbed, a base course, and a hard paved layer on an upper part of a foundation support layer and having a rigid structure inside the roadbed or the base course, a shock absorbing layer is formed by surrounding a filler by a reinforcing material in a boundary part of the rigid structure and the roadbed or the base course, a plurality of shock absorbing layers are formed and overlapped to form a shock absorbing part, and the base course and the hard paved layer are formed on the upper part of the shock absorbing part to construct the paved road. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a level difference suppressing method and a level difference suppressing structure for a paved road.

The structure of a general paved road is a laminate of a road bed 4 located at the top of the road body, a road bed 3 located at the top of the road bed 4, and a hard pavement layer 2 located at the top of the road bed 3. In this structure, the load acting on the vehicle or the like is distributed downward and transmitted. (Fig. 8 (a))
The road floor 4 is often provided with a concrete rigid structure 5 such as an underground passage, a water channel, and a common groove.

When the paved road receives a large load due to an earthquake or the like, the lower road body and the road bed 4 are deformed.
When the rigid structure 5 is present in the road bed 4, the rigid structure 5 is not deformed. Therefore, the paved road where the rigid structure 5 exists and the paved road where the rigid structure 5 does not exist are deformed. The thickness of the road body and the layer of the road floor 4 is different, and the deformation amount of the portion where the rigid structure 5 exists is smaller.
For this reason, a large level difference A is generated on the paved road above the boundary portion of the rigid structure 5. (Fig. 8 (b))

In recent years, facilities such as nuclear power plants and airports have been constructed by reclaiming sandy beaches and seas, and many rigid structures are arranged below the paved roads of such facilities.
The ground formed by reclamation has a large displacement due to liquefaction during an earthquake, resulting in steps at the boundaries of many rigid structures, blocking road traffic within the facility. As a result, the function of the facility is lost, and the economic loss until the restoration increases.

  An object of the present invention is to provide a method for suppressing a level difference in a paved road that can be easily constructed and can maintain a road function even when the ground is deformed due to an earthquake or the like.

The first invention of the present application made to achieve the above object is a paved road comprising a road bed, a roadbed, and a hard pavement layer laminated on an upper part of a basic support layer, and a rigid structure inside the roadbed or the roadbed. A step-suppressing method, wherein a buffer layer is formed by surrounding a filler with a reinforcing material at a boundary between the rigid structure and the roadbed or the roadbed, and a plurality of buffer layers are formed. The present invention provides a method for suppressing a level difference in a paved road, characterized in that a buffer portion is constructed, a roadbed and a hard pavement layer are formed on the upper portion of the buffer portion, and a paved road is constructed.
According to a second invention of the present application, in the step suppression method for a paved road according to the first invention, the buffer layer lays the reinforcing material at a boundary portion between the rigid structure and the roadbed or the roadbed, The filler material is sprinkled on the reinforcing material, the both ends of the reinforcing material are rewound and laid on the filler material, and an upper layer reinforcing material that forms an upper buffer layer is laid on the filler material, and the reinforcing material The present invention provides a method for suppressing the level difference of a paved road, characterized in that it is formed by connecting the upper layer reinforcing material and the upper layer reinforcing material.
3rd invention of this application is a level | step difference suppression construction method of the paved road of 2nd invention, apply | coats the mortar to the said reinforcing material laid, and sprinkles out the said filler on the said reinforcing material which apply | coated the mortar, It is characterized by the above-mentioned. , Provide a method to suppress the level difference of paved roads.
The fourth invention of the present application is the step suppression method for a paved road according to any one of the first invention to the third invention, wherein the buffer layer is laid from one boundary portion to the other boundary portion of the rigid structure, Provided is a step-suppressing method for a paved road, wherein a plurality of the buffer layers are polymerized, and a buffer portion is constructed over the rigid structure.
5th invention of this application is a level | step difference suppression structure of the paved road which laminated | stacks a road bed, a roadbed, and a hard pavement layer on the upper part of a foundation support layer, and has a rigid structure in a roadbed or a roadbed inside, The said hard A lower part of the pavement layer, and having a buffer part at a boundary part between the rigid structure and the road bed or the road bed, and the buffer part includes a plurality of buffer layers in which a filler is surrounded by a reinforcing material. Provided is a step-suppressing structure for a paved road, characterized by being formed by polymerization.
6th invention of this application is the level | step difference suppression structure of the paved road of 5th invention, The said buffer part is comprised ranging from one boundary part of the said rigid structure to the other boundary part, The paved road characterized by the above-mentioned. A level difference suppressing structure is provided.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
Since the <1> buffer layer is configured by surrounding the filler with a reinforcing material, the construction is easy and the curing period is unnecessary, so the construction period can be shortened.
<2> Since only the upper boundary of the rigid structure is excavated and constructed, the existing road can be reinforced in a short construction period.

Explanatory drawing of the level | step difference suppression structure of the paved road of this invention Explanatory drawing of reinforcing material laying work for level difference control method Illustration of buffer layer construction Illustration of buffer construction Explanatory drawing at the time of level difference generation of level difference control structure of the present invention Explanatory drawing of the buffer layer construction work concerning Example 2 of the present invention Explanatory drawing of the level | step difference suppression structure which concerns on Example 3 of this invention. Explanatory drawing of the conventional paved road structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[1] Outline of the step restraining structure The paved road step restraining structure according to the construction method of the present invention is composed of a road bed 4 positioned at the upper part of the road body, a road bed 3, and asphalt or concrete located above the road bed 3. In a paved road comprising a hard pavement layer 2 and placing a rigid structure 5 made of concrete, such as an underground passage, a waterway, a common ditch, etc., on the road floor 4, in the road bed 4 or the road bed 3 above the rigid structure 5, The buffer portion 1 is arranged and configured to protrude from the end portion of the rigid structure 5. (Figure 1)

(1) Buffer part The buffer part 1 is provided in either the road bed 4 or the roadbed 3 located in the upper part of the rigid structure 5, and supports an upper paved road.
The buffer portion 1 is formed by superposing a plurality of buffer layers 10 formed by surrounding a filler 12 with a reinforcing material 11.
The buffer portion 1 is arranged so that one end is hooked on the upper portion of the rigid structure 5 and the other overhangs from the rigid structure 5 over a predetermined range from the end of the rigid structure 5.

(2) Buffer Layer The buffer layer 10 is configured by surrounding the filler 12 rolled to a predetermined thickness with a reinforcing material 11.
The reinforcing material 11 is a well-known various sheet-like thing or net-like thing which has a certain amount of tensile strength and flexibility.
In addition to earth and sand, the filler 12 can be sand, crushed stone, various waste materials that are being disposed of, or a mixture thereof.

[2] Construction Method Next, a construction method of the paved road level difference suppressing structure will be described.

(1) Laying of reinforcing material When a paved road is newly constructed, a paved structure or a rigid structure 5 is constructed up to a position immediately below the position where the buffer portion 1 is formed.
Moreover, when performing earthquake-resistant paving on an existing paved road, the paved road is excavated to a position where the buffer portion 1 is formed.
At this time, since the buffer portion 1 is disposed within a predetermined range from the end portion of the rigid structure 5, it is only necessary to excavate the existing paved road to that extent, so that the construction can be performed at a low cost and in a short construction period. .
In addition, when the upper portion of the rigid structure 5 is located in the roadbed 5, only the hard pavement layer 2 and the roadbed 5 need be excavated, so that the construction can be performed at a low cost and in a short construction period.

Next, a reinforcing material 11a constituting the lowermost buffer layer 10a is laid on the upper surface of the formed road bed 4 or rigid structure 5. (Figure 2)
Since both ends of the reinforcing material 11a are rewound and used, the reinforcing material 11a is laid so that both ends come out from the position where the buffer portion 1 is disposed.
Formwork 13a is arranged at both ends of the laid reinforcing material 11a at positions where the reinforcing material 11a is wound back.
The mold 13 is a U-shaped or J-shaped member, and is a member for forming the end of the buffer layer 10 by rewinding the reinforcing material 11 along the outer periphery of the mold 13.

(2) Construction of Buffer Layer Next, the filler 12a is sprinkled between the arranged molds 13 up to the height of the buffer layer 10a to be formed.
The filler 12a is formed to have a layer thickness of the buffer layer 10a using various rolling devices.
When the filler 12a is rolled out and leveled, both ends of the reinforcing material 11a are rolled back along the mold 13 and laid on the upper surface of the filler 12a.
The mold 13 is a discarded mold, and the buffer layer 10a is constructed while being disposed inside.

(3) Bonding of reinforcing material Reinforcing material 11b constituting the upper buffer layer 10b is laid on the upper surface of the buffer layer 10a. (Figure 3)
The reinforcing material 11b is the same quality as the reinforcing material 11a.
The reinforcing material 11a and the reinforcing material 11b are surrounded by the reinforcing materials 11a and 11b by being connected by a binding material such as a rope material.
By comprising in this way, the buffer layer 10a can be made into a lump shape with high shear strength, bending strength, and toughness by the restraining action of the reinforcing members 11a, 11b.
Further, when the reinforcing material 11a and the reinforcing material 11b are coupled, after joining one end of the reinforcing material 11a, the other end may be coupled while pulling the reinforcing material 11a.
By binding the reinforcing material 11a to the reinforcing material 11b while pulling the reinforcing material 11a, the restraining action of the reinforcing material 11a is increased by the tensile force, and the shear strength, bending strength and toughness of the buffer layer 10a can be increased.

By repeating the above (2) to (3), a plurality of buffer layers 10a to 10c are polymerized to construct the buffer unit 1. (Fig. 4)
The road bed 3 and the road bed 4 around the buffer part 1 may be constructed according to the height of the buffer layer 10 constructed every time the buffer layer 10 is constructed, or constructed after the buffer part 1 is constructed first. May be.
The number of layers for polymerizing the buffer layer 10 can be selected in consideration of the importance of the paved road and the distance between the rigid structure 5 and the hard pavement layer 2.
The uppermost buffer layer 10c surrounds the filler 12c by bonding the reinforcing material 11c wound back from both ends with a bonding material while pulling each other.

(4) Construction of paved road A roadbed 3 and a hard pavement layer 2 are formed on the upper part of the buffer part 1 constructed as described above, and a stepped structure for paved road as shown in FIG. 1 is constructed.

(5) Effect of buffer part The buffer part 1 combines the buffer layer 10 with high shear strength, bending strength, and toughness. For this reason, it deform | transforms, following a deformation | transformation of a lower road body and the road bed 4 smoothly.

When a disaster such as an earthquake occurs, the subgrade 4 or road located at the bottom of the pavement structure collapses due to liquefaction, etc., resulting in uneven settlement at the boundary of the rigid structure 5, resulting in a step A However, the buffer portion 1 obtained by polymerizing the buffer layer 10 having high shear strength, bending rigidity and toughness smoothly deforms following the deformation of the road bed 4 and the road body, and supports the hard pavement layer 2 and the roadbed 3. Therefore, the step A is suppressed. (Fig. 5)
As a result, road traffic can be maintained without causing a steep step in the hard pavement layer 2.

When constructing the buffer layer 10, the mortar 14 may be applied to the laid reinforcing material 11 in a range where the filler 12 is squeezed out, and the filler 12 may be sprinkled thereon. (Fig. 6)
Since the reinforcing material 11 has a sheet shape or a net shape, the reinforcing material 11 is reinforced by the mortar 14, and the reinforcing material 11 and the filler 12 are integrated with each other through the mortar 14. Can be reinforced.
When the buffer portion 1 is deformed following the deformation of the road bed 4, stress (tensile stress) acts on the lower portion of the buffer layer 10 c along the lower surface. By applying the mortar 14 in this range, this portion is reinforced, so that the rigidity of the buffer portion 1 can be effectively increased.

In the above embodiment, the buffer portion 1 is provided in a predetermined range from the end portion of the rigid structure 5, but the buffer portion 1 provided at both end portions is provided over the entire upper range of the rigid structure 5. Therefore, it may be integrally formed. (Fig. 7)
By forming integrally, compared with the case where two or more buffer parts 1 are constructed | assembled, each process needs only once and it can construct | assemble in a short construction period.

DESCRIPTION OF SYMBOLS 1 Buffer part 10 Buffer layer 11 Reinforcement material 12 Filler material 13 Formwork frame 14 Mortar 2 Hard pavement layer 3 Roadbed 4 Roadbed 5 Rigid structure

Claims (6)

A roadbed, roadbed, and hard pavement layer are laminated on the upper part of the support layer, and the method for suppressing the step of a paved road having a rigid structure inside the roadbed or the roadbed,
At the boundary between the rigid structure and the roadbed or the roadbed, a filler is surrounded by a reinforcing material to form a buffer layer,
A plurality of buffer layers are formed and polymerized to construct a buffer part,
In the upper part of the buffer part, a roadbed and a hard pavement layer are formed to construct a paved road,
A leveling control method for paved roads. In the level | step difference suppression method of the paved road of Claim 1,
The buffer layer is
Laying the reinforcing material at the boundary between the rigid structure and the roadbed or the roadbed,
Sprinkling the filler on the reinforcement,
Wrapping both ends of the reinforcing material on the filler
Laying an upper layer reinforcing material forming an upper buffer layer on the filler,
The reinforcing material and the upper-layer reinforcing material are connected and formed,
A leveling control method for paved roads. In the level | step difference suppression method of the paved road of Claim 2,
Placing the mortar into a thin layer on the laid reinforcing material,
The filler is sprinkled on the reinforcing material coated with mortar,
A leveling control method for paved roads. In the level | step difference suppression construction method of the paved road as described in any one of Claims 1 thru | or 3,
Laying the buffer layer from one boundary part of the rigid structure to the other boundary part,
A plurality of the buffer layers are polymerized, and a buffer portion is constructed over the rigid structure,
A leveling control method for paved roads. A roadbed, roadbed, and hard pavement layer are laminated on the upper part of the foundation support layer, and a leveling suppression structure for a paved road having a rigid structure inside the roadbed or the roadbed,
A lower part of the hard pavement layer, having a buffer part at a boundary between the rigid structure and the roadbed or the roadbed;
The buffer portion is formed by polymerizing a plurality of buffer layers in which a filler is surrounded by a reinforcing material,
Stepped structure for paved roads. In the level | step difference suppression structure of the paved road of Claim 5,
The buffer portion is configured to extend from one boundary portion of the rigid structure to the other boundary portion,
Stepped structure for paved roads.

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