JP2005155166A - Lightweight filling structure and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight filling structure and its construction method capable of decreasing resin foam pressure acting on a wall surface material or its strut to decrease a design load of the strut of the wall surface material, alternatively reducing the number of struts so that a construction cost can be lowered in the lightweight filling structure by synthetic resin foaming and its construction method. <P>SOLUTION: It is so characterized that the lightweight filling structure is constituted of a plurality of struts erected on the ground separating a predetermined distance from the back ground stretching to the ground at predetermined intervals in the horizontal direction, the wall surface material fixed to the struts, a net-like reinforcing material constructed on the ground and connecting the front end section to the wall surface material or the struts and a filling layer formed by discharging/foam solidifying a foam synthetic resin raw material in a space defined with the wall surface material, the net-like reinforcing material and the back ground and that its construction method is included. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light-weight embankment structure that is formed by discharging and foam-curing a foamed synthetic resin material such as polyurethane in the field to form a embankment, and a construction method thereof.

Conventionally, embankment reinforcement work has been widely performed for road and port construction, residential land construction, abutment construction, etc., but when embankment is formed only with earth and sand, slippage occurs between the lower layers due to its weight It was easy. Therefore, a so-called lightweight embankment structure has been widened in which part or all of the embankment is formed by laminating a foamed synthetic resin block made of foamed polystyrene or the like to reduce the weight of the entire embankment to, for example, 40 kg / m ³ or less. . However, in the case of this lightweight embankment structure, the number of man-hours increases because it is necessary to adopt a construction method in which a large number of blocks formed according to a certain standard at a factory or the like are transported to the site and stacked. At the same time, since the degree of freedom in design is low, it is not easy to construct a bank according to the topography of the site.

Therefore, in order to solve these problems, a lightweight embankment is formed by using polyurethane or the like as the foamed synthetic resin raw material, and discharging and foaming and curing the foamed synthetic resin raw material such as polyurethane at the construction site. A structure has been adopted (see, for example, Patent Document 1).
JP 2001-323470 A

However, in the lightweight embankment structure described in Patent Document 1, when the embankment is constructed by foaming polyurethane, the foaming pressure of polyurethane is as high as 0.1 to 2.0 kg / cm ² , so that the wall material (urethane) There is a problem in that the pressure applied to the struts of the light weight embankment and the struts to prevent UV deterioration and fire is extremely large, and therefore the struts of the wall surface material must be rigid and costly.

  In light of the above-described problems, the present invention reduces the resin foam pressure applied to the wall material and its support in the lightweight embankment structure by synthetic resin foaming and its construction method, or reduces the design load of the wall material support, or The purpose is to be able to reduce the number of support columns and to reduce the construction cost.

In order to achieve the above object, the first aspect of the lightweight embankment structure according to the present invention is:
A plurality of support columns erected on the ground at a predetermined distance from the back ground that is connected to the ground, at a predetermined interval in the lateral direction, a wall surface material fixed to the support columns, and a front end portion laid on the ground It is formed by discharging and foam-curing a foamed synthetic resin raw material in a space defined by a wall surface material or a mesh-like reinforcing material connected to the support, and the wall surface material, the mesh-like reinforcing material, and a back ground. It is characterized by comprising an embankment layer.

And in the first aspect of the lightweight embankment structure,
Other wall surface material mounted and connected on the wall surface material and fixed to the column, and other mesh-like reinforcement laid on the embankment layer and having a front end connected to the wall surface material or the column And other embankment layers formed by discharging and foam-curing a foamed synthetic resin material into a space defined by the other wall surface material, the other mesh-like reinforcing material, and the back ground. The structure is further characterized by repeating one or more times.

Moreover, the 2nd aspect of the lightweight banking structure by this invention is the following.
A plurality of support columns standing at a predetermined interval on a ground separated from a back surface ground connected to the ground, a wall surface material fixed to the support columns, and a front end portion laid on the ground and the front end portion of the wall surface material or A mesh reinforcement connected to the support; a sill that contacts the support from the opposite side of the wall material and is placed on the mesh reinforcement; the sill and the mesh reinforcement; It is characterized by comprising an embankment layer formed by discharging and foaming and curing a foamed synthetic resin raw material in a space defined by the back ground.

And in the second aspect of the lightweight embankment structure,
Another wall surface material placed and connected on the wall surface material and fixed to the column, and another mesh shape laid on the embankment layer and having a front end connected to the other wall surface material or the column material The reinforcing material, the other sill material placed on the sill material via the other mesh reinforcing material, the other sill material, the other mesh reinforcing material, and the back ground are defined. It is characterized by repeating one or more structures composed of another embankment layer formed by discharging and foaming and curing a foamed synthetic resin raw material in the space to be formed.

Furthermore, in each above-mentioned embankment structure,
The embankment layer is composed of a plurality of foamed synthetic resin layers sequentially formed and laminated.

Moreover, the 1st aspect of the lightweight banking construction method by this invention is as follows.
A plurality of columns are erected on the ground at a predetermined distance from the back ground that is connected to the ground, with a predetermined interval in the horizontal direction, the wall material is fixed to the columns, and a mesh-like reinforcing material is laid on the ground. And the front end part is connected to the wall surface material or the support column, and the embankment layer is formed by discharging and foaming and curing the foamed synthetic resin raw material in a space defined by the wall surface material, the mesh-like reinforcing material, and the back ground. It is characterized by forming.

And in the 1st mode of the above-mentioned lightweight embankment construction method,
Another wall surface material is placed on and connected to the wall surface material and fixed to the column, another mesh-like reinforcing material is laid on the embankment layer, and the front end thereof is the other wall surface material or the column. A step of forming another embankment layer by discharging and foaming and curing a foamed synthetic resin raw material in a space defined by the other wall surface material, the other mesh reinforcing material and the back ground. Further, one or more repetitions are performed.

Moreover, the second aspect of the lightweight banking construction method according to the present invention is as follows.
A plurality of columns are erected on the ground at a predetermined distance from the back ground that is connected to the ground, with a predetermined interval in the horizontal direction, the wall material is fixed to the columns, and a mesh-like reinforcing material is laid on the ground. And the front end part is connected to the wall surface material or the column, the sill material is brought into contact with the column from the opposite side of the wall surface material, and is placed on the mesh reinforcing material, and the sill material and the mesh shape The embankment layer is formed by discharging and foaming and curing a foamed synthetic resin material in a space defined by the reinforcing material and the back ground.

And in the second aspect of the lightweight embankment construction method,
Another wall surface material is placed on and connected to the wall surface material and fixed to the column, another mesh-like reinforcing material is laid on the embankment layer, and the front end thereof is the other wall surface material or the column. The other sill material is placed on the sill material via the other mesh reinforcement, and is defined by the other sill material, the other mesh reinforcement, and the back ground. The step of forming another embankment layer by discharging and foaming and curing the foamed synthetic resin raw material in the space is further repeated one or more times.

Furthermore, in each of the above lightweight embankment construction methods,
The embankment layer is formed by sequentially forming and laminating a plurality of foamed synthetic resin layers.

  According to the first aspect of the light weight embankment structure and construction method, since the mesh reinforcement is connected to the wall material or the column and the embedding layer of the foamed synthetic resin firmly fixes the mesh reinforcement, the wall material and its The resin foaming pressure applied to the support is reduced. Therefore, the design load of the column supporting the wall material can be reduced, or the number of columns can be reduced. As a result, the construction cost is reduced.

  In addition, according to the second aspect of the light weight embankment structure and construction method, of course, it has the same effect as the first aspect, but the resin foaming pressure is applied to the sill material and not directly on the wall surface material. Even when wall materials that are long in the lateral direction are used, these wall materials are not distorted by the resin foaming pressure.

1st Embodiment of the lightweight banking structure and its construction method by this invention is described based on FIG.
FIG. 1 is a cross-sectional view showing the first embodiment, and a back ground 2 is connected to the ground 1. In this embodiment, a plurality of support columns 3 erected at predetermined intervals in the horizontal direction on the ground 1 separated from the back surface ground 2 connected to the ground 1 by a predetermined distance, and wall surfaces 4 fixed to the support columns 3; In a space defined by a mesh-like reinforcing material 6 laid on the ground 1 and having a front end connected to the wall surface material 4 or the column 3, the wall material 4, the mesh-like reinforcing material 6, and the back surface ground 2. The first embankment structure including the first embankment layer 5 formed by discharging and foaming and curing the foamed synthetic resin material is included.

  Further, another wall surface material 4a mounted on and connected to the wall surface material 4 and fixed to the support column 3, and laid on the first embankment layer 5 and its front end connected to the wall surface material 4a or the support column 3 It was formed by discharging and foaming and curing a foamed synthetic resin raw material in the space defined by the other mesh-like reinforcing material 6a, the wall surface material 4a, the mesh-like reinforcing material 6a, and the back ground 2. A second bank structure composed of the second bank layer 5a is provided on the first bank structure. Further, the third, fourth,... Bank structure having the same configuration as the second bank structure is repeated until a desired height is reached.

  If the construction method of this embodiment is demonstrated, the ground construction which excavates the ground 1 first and forms the upper surface of the ground 1 in a plane will be performed. If necessary, a waterproof primer is applied on the ground 1 and the back ground 2 to give the ground 1 and the back ground 2 waterproof, and adhesion between the foamed synthetic resin embankment described later, the ground 1 and the back ground 2 is performed. You may improve the nature.

  Next, a plurality of columns 3 made of H steel or the like are erected on the ground 1 separated from the back ground 2 by a predetermined distance in the lateral direction (direction perpendicular to the drawing). Fix to the pillar 3 so as to face the ground 2. As the wall material 4, various materials such as a concrete panel and a concrete block having a height of about 50 cm and a horizontal length of about 2 m are used. Then, a mesh-like reinforcing material 6 such as geotextile is laid on the upper surface of the ground 1, the front end portion is connected to the wall surface material 4 or the support column 3, and the rear end portion is connected to the back ground 2 by an anchor (not shown) as necessary. To do. The term “mesh” used herein includes “lattice” in a broad sense. The mesh reinforcing material 6 such as geotextile may be made of metal or synthetic resin. And

  Next, a foamed synthetic resin raw material is discharged and foam-cured in a space defined by the wall material 4, the mesh-like reinforcing material 6, and the back ground 2 to form an embankment layer. It is desirable to use foam raw materials, and the components, isocyanate and polyol, catalyst, foaming agent, and other additives are divided into A liquid and B liquid, for example, and transported to the construction site. The mixture is discharged and foam-cured while mixing both liquids, and a plurality of times are repeated to form a banking layer having a predetermined height.

  Specifically, first, the two liquids are mixed on the mesh-like reinforcing material 6 and uniformly sprayed to a thickness of several millimeters. Then, the discharged and sprayed mixed liquid is foamed and cured by a chemical reaction to form a first layer 5-1 of foamed synthetic resin having a height of 1 to 30 cm. In addition, when foaming synthetic resin is foaming urethane, the foam volume magnification with respect to the liquid mixture is about 30 times. Then, this is repeated a plurality of times, for example, four times, and the second layer 5-2, the third layer 5-3, the fourth layer 5-4, and the fifth layer 5-5 of the foamed synthetic resin are sequentially formed and laminated, The first embankment layer 5 having a height of 50 to 100 cm is formed. The foamed synthetic resin layers that are in contact with each other are made of the same material and are therefore firmly bonded to each other. Further, since the first layer 5-1 of the foamed synthetic resin is in contact with the surface of the ground 1 through the mesh of the mesh reinforcing material 6, the first layer 5-1 is firmly bonded to the ground 1 and is attached to the mesh reinforcing material 6. The anchor effect is demonstrated. Furthermore, since it is in direct contact with the back ground 2, it is firmly bonded to the back ground 2.

  Next, another wall surface material 4 a is mounted on the wall surface material 4 and fixed to the support column 3. Then, another mesh-like reinforcing material 6a is laid on the upper surface of the first embankment layer 5, that is, the upper surface of the fifth layer 5-5 of the foamed synthetic resin. At that time, the front end portion of the mesh-like reinforcing material 6a is connected to the wall surface material 4 or the support column 3, and the rear end portion is connected to the back ground 2 by an anchor (not shown) as necessary.

  Then, the said foaming synthetic resin raw material is discharged and foam-cured in the space defined by the wall surface material 4a, the mesh-like reinforcement material 6a, and the back ground 2, and a 2nd embankment layer is formed. Specifically, the sixth solution of foamed synthetic resin having a height of 1 to 30 cm is obtained by uniformly discharging and spraying the both liquids on the mesh-like reinforcing material 6a to a thickness of several millimeters while being mixed and foaming and curing by chemical reaction. Layers 5-6 are formed. Then, this is repeated a plurality of times, for example, four times, and the seventh layer 5-7, the eighth layer 5-8, the ninth layer 5-9, and the tenth layer 5-10 of the foamed synthetic resin are sequentially formed and laminated, A second embankment layer 5a having a height of 50 to 100 cm is formed. The foamed synthetic resin layers that are in contact with each other are made of the same material and are therefore firmly bonded to each other. Further, since the fifth layer 5-5 and the sixth layer 5-6 are in contact with each other through the mesh of the mesh reinforcing material 6a, the fifth layer 5-5 and the sixth layer 5-6 are firmly bonded to each other and exert an anchor effect on the mesh reinforcing material 6a. .

  Further, another wall surface material 4 b is placed on and connected to the wall surface material 4 a and fixed to the column 3. Then, another mesh reinforcing material 6b is laid on the upper surface of the second embankment layer 5a, that is, the upper surface of the tenth layer 5-10 of the synthetic foam resin. At that time, the front end portion of the mesh reinforcing member 6b is connected to the wall surface material 4a or the support column 3, and the rear end portion is connected to the back ground 2 by an anchor (not shown) as required. Subsequently, the foamed synthetic resin raw material is discharged and foam-cured into a space defined by the wall surface material 4b, the mesh-like reinforcing material 6b, and the back ground 2 by a process similar to the process of forming the second embankment layer 5a. Then, the third embankment layer 5b composed of a plurality of foamed synthetic resin layers that are sequentially formed and laminated is formed. And the said process is repeated until the height of the whole embankment becomes desired height, and a lightweight embankment structure is completed.

  According to the light weight embankment structure and the construction method thereof according to the first embodiment, the mesh reinforcements 6, 6a, 6b... Are connected to the wall surface materials 4, 4a, 4b. Are firmly fixed to the mesh reinforcements 6, 6a, 6b, etc., so that the resin foam pressure applied to the wall surface materials 4, 4a, 4b, etc. Is reduced. Therefore, the design load of the columns 3 that support the wall material can be reduced, or the number of columns 3 can be reduced, resulting in a reduction in construction cost.

Next, a second embodiment of the lightweight embankment structure and construction method according to the present invention will be described with reference to FIG.
FIG. 2 is a cross-sectional view showing a second embodiment. In this embodiment, a plurality of support columns 3 standing at predetermined intervals in the horizontal direction on the ground 1 separated by a predetermined distance from the back surface ground 2 connected to the ground 1, a wall surface material 4 fixed to the support columns 3, and A mesh-like reinforcing material 6 laid on the ground 1 and whose front end is connected to the wall surface material 4 or the column 3, and abuts on the column 3 from the opposite side of the wall material 4 and is placed on the mesh-like reinforcement material 6 It is formed by discharging and foam-curing a foamed synthetic resin raw material in a space defined by the sill material 7 such as a resin sheet or foamed resin board, the sill material 7, the mesh reinforcement 6 and the back ground 2. 1st embankment structure which consists of the made 1st embankment layer 5 is included.

  Further, another wall surface material 4a mounted on and connected to the wall surface material 4 and fixed to the support column 3, and laid on the first embankment layer 5 and its front end connected to the wall surface material 4a or the support column 3 Another mesh reinforcing material 6a formed, another sill material 7a placed on the sill material 7 via the mesh reinforcing material 6a, the sill material 7a and the mesh reinforcing material 6a, A second embankment structure comprising a second embankment layer 5 formed by discharging and foaming and curing a foamed synthetic resin material in a space defined by the back ground 2 is provided on the first embankment structure. ing. Further, the third, fourth,... Bank structure having the same configuration as the second bank structure is repeated until a desired height is reached.

This second embodiment is different from the first embodiment in that the sill materials 7, 7a, 7b... Are placed on the column 3 from the opposite side of the wall surface materials 4, 4a, 4b. They are arranged so as to contact and face the back ground 2. Then, a sill material 7 is formed on the mesh reinforcing material 6, a sill material 7a is disposed on the sill material 7 via the mesh reinforcing material 6a, and a sill material is disposed on the sill material 7a via the mesh reinforcing material 6b. 7b is placed, and the first embankment layer 5 is formed in the space defined by the sill material 7, the mesh reinforcement 6 and the back ground 2, and the sill 7a, the mesh reinforcement 6a and the back ground 2 The second embankment layer 5a is formed in the space defined by the above, and the third embankment layer 5b is formed in the space defined by the sill material 7b, the mesh-like reinforcing material 6b, and the back ground 2, and the above-mentioned foamed synthetic resin. It is formed by discharging and foam-curing the raw material.
Except for these points, the same structure and construction method as in the first embodiment are employed.

  According to this structure and construction method, the resin foaming pressure is applied to the sill materials 7, 7a, 7b... And not directly applied to the wall materials 4, 4a, 4b. , 4b, etc., these wall materials are not distorted by the resin foaming pressure.

It is sectional drawing of the 1st embodiment of this invention. It is sectional drawing of the 2nd embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ground, 2 ... Back surface ground, 3 ... Support | pillar, 4, 4a, 4b ... Wall surface material, 5, 5a ..., 6, 6a, 6b ... Reinforcement material, 7, 7a, 7b ... Sill material.

Claims (10)

A plurality of support columns erected at predetermined intervals in the horizontal direction on a ground that is separated from a back surface ground that is connected to the ground, a wall surface material fixed to the support columns, and a front end portion that is laid on the ground and has a front end portion. It is formed by discharging and foam-curing a foamed synthetic resin raw material into a space defined by a wall surface material or a mesh-like reinforcing material connected to the support, and the wall surface material, the mesh-like reinforcing material, and a back ground. A lightweight embankment structure characterized by comprising an embankment layer. Other wall materials placed on and connected to the wall material and fixed to the column, and other meshes laid on the embankment layer and having a front end connected to the other wall material or the column And other embankment layers formed by discharging and foam-curing a foamed synthetic resin raw material in a space defined by the other wall surface material, the other mesh-like reinforcing material and the back ground, The lightweight embankment structure according to claim 1, wherein the structure consisting of is further repeated one or more times. A plurality of support columns standing at predetermined intervals on a ground separated from a back ground surface that is connected to the ground, a wall surface material fixed to the support columns, and a front end portion laid on the ground and the front end portion of the wall surface material or A mesh reinforcement connected to the support; a sill that contacts the support from the opposite side of the wall material and is placed on the mesh reinforcement; the sill and the mesh reinforcement; A lightweight embankment structure comprising an embankment layer formed by discharging and foaming and curing a foamed synthetic resin material in a space defined by a back ground. Another wall surface material placed and connected on the wall surface material and fixed to the column, and another mesh shape laid on the embankment layer and having a front end connected to the other wall surface material or the column material The reinforcing material, the other sill material placed on the sill material via the other mesh reinforcing material, the other sill material, the other mesh reinforcing material, and the back ground are defined. The lightweight embankment structure according to claim 3, wherein one or more of the structures composed of another embankment layer formed by discharging and foaming and curing a foamed synthetic resin material in the space to be further repeated.   The lightweight embankment structure according to any one of claims 1 to 4, wherein the embankment layer is composed of a plurality of foamed synthetic resin layers formed and laminated sequentially. A plurality of columns are erected on the ground at a predetermined distance from the back ground that is connected to the ground, with a predetermined interval in the horizontal direction, the wall material is fixed to the columns, and a mesh-like reinforcing material is laid on the ground. And the front end part is connected to the wall surface material or the support column, and the embankment layer is formed by discharging and foaming and curing the foamed synthetic resin raw material in a space defined by the wall surface material, the mesh-like reinforcing material, and the back ground. A lightweight embankment method characterized by forming Another wall surface material is placed on and connected to the wall surface material and fixed to the column, another mesh-like reinforcing material is laid on the embankment layer, and the front end thereof is the other wall surface material or the column. A step of forming another embankment layer by discharging and foaming and curing a foamed synthetic resin raw material in a space defined by the other wall surface material, the other mesh reinforcing material and the back ground. Furthermore, the lightweight embankment construction method according to claim 6, wherein one or more are repeated. A plurality of columns are erected on the ground at a predetermined distance from the back ground that is connected to the ground, with a predetermined interval in the horizontal direction, the wall material is fixed to the columns, and a mesh-like reinforcing material is laid on the ground. And the front end part is connected to the wall surface material or the column, the sill material is brought into contact with the column from the opposite side of the wall surface material, and is placed on the mesh reinforcing material, and the sill material and the mesh shape A lightweight embankment structure characterized by forming an embankment layer by discharging and foaming and curing a foamed synthetic resin material in a space defined by a reinforcing material and a back ground. Another wall surface material is placed on and connected to the wall surface material and fixed to the column, and another mesh-like reinforcing material is laid on the embankment layer, and its front end is attached to the other wall surface material or the column. The other sill material is placed on the sill material via the other mesh reinforcement, and is defined by the other sill material, the other mesh reinforcement, and the back ground. 9. The lightweight embankment construction method according to claim 8, further comprising repeating one or more steps of forming another embankment layer by discharging and foaming and curing a foamed synthetic resin material in the space. The lightweight embankment construction method according to any one of claims 6 to 9, wherein the embankment layer is formed by sequentially forming and laminating a plurality of foamed synthetic resin layers.

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