Construction method of embankment structure

Abstract

To provide a construction method of an embankment structure that uses lightweight embankment blocks, improves workability, and is also practical.SOLUTION: A construction method of an embankment structure using a lightweight embankment material comprises: a lightweight embankment block preparation process (S1) of preparing a plurality of lightweight embankment blocks made by pre-solidifying the lightweight embankment material; a block placement process (S3) of placing the lightweight embankment blocks at a target location where the embankment structure is constructed with gaps provided between the lightweight embankment blocks; and an inter-block filling process (S4) of filling the gaps between the lightweight embankment blocks with a fluid filler material and solidifying it.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for constructing an embankment structure. [Background technology]

[0002] Lightweight embankment methods are used for embankments on soft ground for roads and bridges, and for holding down embankments at tunnel entrances. By using lightweight embankment methods to make the embankment itself lighter, it is possible to reduce the earth pressure on the embankment. Known lightweight embankment methods include the EPS method, which uses expanded polystyrene blocks, and methods that use lightweight aerated materials (FCB method, N-SPC method, etc.).

[0003] An example of the procedure for a conventional construction method using aerated lightweight materials will be described below with reference to Fig. 6. Fig. 6 shows a schematic diagram of an embankment structure 31 constructed on a slope S of natural ground, on which a road R is built. (1) Forming and excavating the slope S of the ground: Plowing the surface and cutting the earth. (2) Install drainage material on the ground and spray mortar. (3) Insert reinforcing bars (shear bolts 32) to stabilize the ground. (4) After excavating the foundation, the foundation blocks 33 are installed and the anchors 34 are installed. (5) Install the panel 35, secure it with connecting members, and waterproof the gaps in the panel 35. (6) The plant equipment is placed at the construction site, and aerated lightweight material 36 (air milk or air mortar) is poured to match the height of the panels 35. (7) Repeat steps (5) and (6) above to complete construction to the desired height. In Figure 6, the height positions of the aerated lightweight material poured in each stage are indicated by dotted lines, and the final poured portion of the aerated lightweight material 36 is indicated by hatching. (8) After the aerated lightweight material 36 has been poured, a waterproofing work 37 (prime coat or waterproof sheet) is installed on top of it.

[0004] In construction methods using aerated lightweight materials, the cement, aerated material, water, and other components are test-mixed at the construction site to determine the mix ratio for quality control. Furthermore, humidity temperature, air content, flow value, and uniaxial compression tests are conducted on each pouring day. However, the workload associated with quality control is significant, and large-scale plant equipment is required at the construction site, resulting in a significant labor and work process. Furthermore, in recent years, there has been concern about a shortage of skilled workers and management engineers in the construction industry, and from this perspective, there is a demand for improved workability in the construction of embankment structures.

[0005] A method using lightweight embankment blocks has been proposed as a way to address the issues with the construction method using aerated lightweight materials. This method uses lightweight embankment blocks that have been pre-formed (e.g., precast) instead of preparing aerated lightweight materials on-site.

[0006] For example, Patent Document 1 describes an embankment structure constructed by stacking lightweight embankment blocks, each made by mixing and solidifying recycled coal ash into a polygonal prism, in layers. The lightweight embankment blocks are, for example, hexagonal prisms, with other lightweight embankment blocks stacked adjacent to each face in a honeycomb pattern. Furthermore, when the lightweight embankment blocks are rectangular prisms, they have mating recesses on the top surface and mating protrusions on the bottom surface. When the lightweight embankment blocks are stacked one on top of the other, the mating protrusions of the upper blocks fit into the mating recesses of the lower blocks, resulting in a regular stack. The gap between the backside of the stacked lightweight embankment blocks and the slope is then filled with lightweight soil to backfill the gap.

[0007] Patent Document 2 describes a lightweight embankment block that has fitting protrusions and fitting grooves on its outer surface and has geotextiles embedded inside. These lightweight embankment blocks are stacked one on top of the other and joined together with connecting members to apply prestress to form an embankment unit, and these embankment units are joined front to back, left to right to form an embankment layer. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-11108 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-277910 Summary of the Invention [Problem to be solved by the invention]

[0009] As mentioned above, by using lightweight embankment blocks, large-scale plant equipment like that used for aerated lightweight materials is not required at the construction site, and the quality control associated with aerated lightweight materials (on-site mix testing and quality control at each pour) is also not required.

[0010] However, despite the advantages of using lightweight embankment blocks, they have not yet been put to practical use as a method for constructing embankment structures.

[0011] The present invention has been made in consideration of these circumstances, and aims to provide a construction method for embankment structures that uses lightweight embankment blocks, improves workability, and is practical. [Means for solving the problem]

[0012] In order to solve the above-mentioned problems, the inventors focused on the structure of lightweight embankment blocks in embankment structures that have been proposed in the past. Specifically, because lightweight embankment blocks are placed (buried) in embankment structures with their surfaces exposed, they are susceptible to the effects of the external environment, which is thought to cause deterioration over time. Specifically, it was thought that water absorption by lightweight embankment blocks could increase the weight of the lightweight embankment blocks, which could lead to a decrease in block strength and an increase in earth pressure on the embankment structure. The present invention was made based on this idea.

[0013] The method for constructing an embankment structure of the present invention is a method for constructing an embankment structure using lightweight embankment material, and is characterized by comprising a lightweight embankment block preparation process for preparing a plurality of lightweight embankment blocks made by pre-solidifying the lightweight embankment material, a block placement process for placing the lightweight embankment blocks at the target location where the embankment structure will be constructed, with gaps between each lightweight embankment block, and a block inter-filling process for filling the gaps between the lightweight embankment blocks with a fluid filler material and solidifying it.

[0014] The inter-block filling process is characterized in that it is a process of filling and solidifying the fluid filler over substantially the entire embankment structure so that the surfaces of the lightweight embankment blocks are not exposed.

[0015] The lightweight embankment block has a plurality of protruding, unconnected legs on any one side, and in the block placement process, the legs of one lightweight embankment block come into contact with the face of another adjacent lightweight embankment block, so that the parts other than the contacting legs become the gaps between the lightweight embankment blocks, and in the inter-block filling process, the fluid filler is filled into the gaps from between the legs.

[0016] One form of the above method is a method for constructing the embankment structure on a slope, which includes a retaining wall formation process before the block placement process, in which panels are stacked on foundation blocks at the bottom of the slope to form a retaining wall, the target area in the block placement process is the space between the retaining wall and the slope, and the inter-block filling process involves filling and solidifying the fluid filler, including the gaps between the retaining wall and the lightweight embankment blocks.

[0017] Another form of the above method is a method for constructing the above embankment structure on a slope, characterized in that in the lightweight embankment block preparation process, a panel is fixed integrally to one side of some of the prepared lightweight embankment blocks, and in the block placement process, the lightweight embankment blocks with the panel fixed are stacked so that they are positioned at the forefront of the target area to form a retaining wall. [Effects of the Invention]

[0018] The method for constructing an embankment structure of the present invention is a method for constructing an embankment structure using multiple lightweight embankment blocks made from pre-solidified lightweight embankment material. This method does not require large-scale plant equipment at the construction site as is the case with conventional aerated lightweight materials, and also eliminates the need for quality control associated with aerated lightweight materials (on-site mix testing and quality control at each pouring), which is expected to shorten construction times and improve workability.

[0019] Furthermore, the construction method includes a block placement step of placing lightweight embankment blocks at the target location where the embankment structure will be constructed, leaving gaps between each lightweight embankment block, and a block filling step of filling the gaps between the lightweight embankment blocks with fluid filler and solidifying it. The solidified fluid filler fills the gaps between the lightweight embankment blocks, allowing the lightweight embankment blocks to be joined together. Furthermore, the fluid filler covers at least a portion of the surface of the lightweight embankment blocks, preventing their surface from being exposed. As a result, deterioration over time due to water absorption and other factors can be suppressed, and a decrease in block strength and an increase in earth pressure on the embankment structure can be suppressed, resulting in an embankment structure that can be put into practical use.

[0020] The inter-block filling process involves filling and solidifying a fluid filler over almost the entire embankment structure so that the surface of the lightweight embankment blocks is not exposed.This means that the surfaces of the lightweight embankment blocks are covered with the fluid filler, making it even easier to prevent changes over time due to water absorption, etc.

[0021] The lightweight embankment blocks have multiple protruding, unconnected legs on any one face, and during the block placement process, the legs of one lightweight embankment block come into contact with the face of another adjacent lightweight embankment block, causing the parts other than the contacting legs to become gaps between the lightweight embankment blocks, and fluid filler is filled into the gaps between the legs, making it easier to reliably interpose fluid filler in the gaps between adjacent lightweight embankment blocks in the vertical direction.

[0022] One form of the above method is a method for constructing an embankment structure on a slope, which includes a retaining wall formation process before the block placement process, in which panels are stacked on foundation blocks at the bottom of the slope to form a retaining wall, and in the inter-block filling process, fluid filler is filled and solidified, including into the gaps between the retaining wall and the lightweight embankment blocks.This means that the solidified fluid filler is present not only in the gaps between the lightweight embankment blocks, but also in the gaps between the retaining wall and the lightweight embankment blocks, allowing the retaining wall and multiple lightweight embankment blocks to be joined together as a single unit, making it easier to ensure the strength of the embankment structure as a whole.

[0023] Another form of the above method is a method for constructing an embankment structure on a slope, in which, in the lightweight embankment block preparation process, panels are fixed integrally to one side of some of the manufactured lightweight embankment blocks, and in the block placement process, the lightweight embankment blocks with the panels fixed to them are stacked so that they are positioned at the forefront of the target area to form a retaining wall, thereby eliminating the need for separate work of stacking panels, leading to further improvements in workability. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a flow chart showing an example of a method for constructing an embankment structure of the present invention. [Figure 2] 1 is a plan view of an example of a lightweight embankment block. [Figure 3] 1 shows a schematic diagram of an intermediate stage in the construction of an embankment structure of the present invention. [Figure 4] 1 is a schematic diagram of an embankment structure constructed by the construction method of the present invention. [Figure 5] FIG. 5 is an enlarged view of part A in FIG. 4. [Figure 6] 1 is a schematic diagram of an embankment structure constructed using a conventional method using cellular mixed lightweight materials. DETAILED DESCRIPTION OF THE INVENTION

[0025] The method for constructing an embankment structure of the present invention is a construction method using lightweight embankment blocks. This construction method can replace the construction method using aerated lightweight materials, and can be applied to all locations where aerated lightweight materials are used. For example, the construction method of the present invention can be applied to the construction of road and bridge embankments on soft ground, and filling embankments at tunnel entrances.

[0026] An example of a method for constructing an embankment structure of the present invention will be described using the flow chart in Figure 1. Figure 1 shows an example of a method for constructing an embankment structure on a slope. This method comprises a lightweight embankment block preparation step (S1), a retaining wall formation step (S2), a block placement step (S3), and a block-space filling step (S4). Note that the retaining wall formation step (S2) only needs to be performed before the block placement step (S3), and there is no particular restriction on the order of the lightweight embankment block preparation step (S1). Furthermore, the retaining wall formation step (S2) may be omitted as necessary.

[0027] Each step will be explained below.

[0028] [Lightweight embankment block preparation process (S1)] In this process, a plurality of lightweight embankment blocks are prepared by pre-solidifying lightweight embankment materials. Lightweight embankment materials are embankment materials that are lighter than regular soil, and examples of such materials include aerated lightweight soil, foamed bead lightweight soil, coal ash, and granulated slag. A suitable mixture of these materials may also be used. For example, aerated lightweight soil is a lightweight material made by mixing raw soil (sandy soil), cement, water, and an aerating agent.

[0029] The lightweight embankment blocks used in the present invention are solidified into a predetermined shape, for example, a rectangular prism. Figure 2 shows an example of a lightweight embankment block. Figure 2(a) shows a plan view of the lightweight embankment block, Figure 2(b) shows a bottom view, and Figure 2(c) shows a side view.

[0030] The lightweight embankment block 1 shown in Fig. 2 is, for example, a rectangular parallelepiped with a square shape of about 1000 mm in plan view and a height H (including the protruding height h of the legs 2) of about 500 mm. The lightweight embankment block 1 is manufactured, for example, in a factory.

[0031] In Figure 2, the top surface 1a and side surfaces 1c of the lightweight embankment block 1 are flat. On the other hand, a plurality of protruding, unconnected legs 2 are formed on the bottom surface 1b. The legs 2 are provided at the four corners of the bottom surface 1b and inside (the center), for a total of five legs 2. The legs 2 provided at the four corners are formed so that their outer side surfaces are flush with the side surfaces 1c of the lightweight embankment block 1. Furthermore, in the lightweight embankment block 1, it is preferable that the bottom surface 1b and the legs 2 are connected by an inclined surface.

[0032] In Figure 2, the shape of the legs 2 is square in plan view, but this is not limited to this. The number and arrangement of the legs 2 can be changed as appropriate depending on the size of the lightweight embankment block, etc. Since the legs 2 support the load, it is preferable to arrange the legs 2 so that the load is not unevenly distributed among the legs.

[0033] When multiple lightweight embankment blocks 1 are stacked vertically (in the y-axis direction in FIG. 3), the legs 2 come into contact with the upper surfaces of adjacent lightweight embankment blocks on the underside. In this case, gaps are formed between the lightweight embankment blocks in areas other than the legs that are in contact with other lightweight embankment blocks, and in step S4, which will be described later, fluid filler is filled into these gaps from between the legs 2. This lightweight embankment block 1 is not configured to fit into adjacent lightweight embankment blocks so that there are no gaps, as are the lightweight embankment blocks described in Patent Documents 1 and 2, but rather is configured so that gaps are intentionally formed between adjacent lightweight embankment blocks.

[0034] In the lightweight embankment block 1, the legs 2 are not connected to each other but are formed independently, and are formed so that the fluid filler can easily flow into the gaps between the lightweight embankment blocks.

[0035] In Figure 2, the protruding height h of each leg portion 2 is formed to be equal to one another. The protruding height h is not particularly limited and is set, for example, to 30 mm to 200 mm. By setting it within this range, the fluid filler can easily flow into the gaps formed by the legs 2 and the load on the legs 2 can be reduced. The protruding height h of the legs 2 may be set to 50 mm to 150 mm. Furthermore, the protruding height h may be 1% to 10% of the height H of the lightweight embankment block 1.

[0036] In the present invention, even if the lightweight embankment block 1 is made of a material that easily absorbs water, deterioration over time due to water absorption can be suppressed by covering at least a part of the surface with a fluid filler. The lightweight embankment block 1 is made of, for example, aerated lightweight soil, and its density is, for example, 0.50 g / cm 3 ~0.80g / cm 3 and 0.60 g / cm 3 ~0.75g / cm 3 The shape of the lightweight embankment block 1 is not limited to the configuration shown in Fig. 2, and may be a cube or a shape other than a quadrangular prism.

[0037] [Retaining wall formation process (S2)] In this process, the panels are stacked on foundation blocks at the bottom of the slope to form a retaining wall. The foundation blocks (see Figure 6) are installed after the foundation is excavated and secured in place by anchors pressed into the ground.

[0038] Figure 3 is a schematic diagram of an intermediate stage in the construction of the embankment structure of the present invention, illustrating steps S2 and S3. Note that foundation blocks, shear bolts, etc. are omitted from Figure 3 (as are Figure 4). In Figure 3, the x-axis indicates the front-to-back direction of the embankment structure relative to slope S, and the y-axis indicates the height direction of the embankment structure.

[0039] As shown in Figure 3, the retaining wall 5 is made up of multiple panels 3. The panels 3 are made up of precast concrete plates, concrete plates, steel plates, resin plates, etc. The size of the panels 3 is not particularly limited, and for example, the height (vertical) is about 1000 mm and the depth (horizontal) is about 2000 mm. The retaining wall 5 is formed by connecting multiple panels 3 in the height and depth directions. The panels 3 have through holes in the height direction, for example, and are fixed to each other by connecting members 4 (e.g., SPC rods) inserted into the through holes. The retaining wall 5 serves as a protective wall located in front of the embankment structure.

[0040] The joints between the panels are preferably caulked with a sealant to ensure watertightness. To make the caulking easier, the upper corners of the panels 3 are preferably notched with inclined surfaces.

[0041] The height of the panel 3 is preferably higher than the height H of the lightweight embankment blocks (see Figure 2), and can be, for example, about 1.5 to 3 times the height H of the lightweight embankment blocks. In Figure 3, the height of the panel 3 is twice the height H of the lightweight embankment blocks, making it easier to fix reinforcing bolts, which will be inserted into gaps between the lightweight embankment blocks (described later), to the panel 3.

[0042] [Block placement process (S3)] In this step, lightweight fill blocks are placed in the target area where the embankment structure will be constructed, with gaps between each lightweight fill block. In this case, the target area in step S3 is the space between the retaining wall and the slope. The placement of lightweight fill blocks will be explained with reference to Figure 3.

[0043] In Figure 3, multiple lightweight embankment blocks are placed in the space between the retaining wall 5 and the slope S, and three types of lightweight embankment blocks are used. Specifically, lightweight embankment block 1A, which is rectangular in the xy plane, lightweight embankment block 1B, which is square in the xy plane, and lightweight embankment block 1C, which is trapezoidal in the xy plane, are used. In Figure 3, lightweight embankment block 1A is placed as the main block, and lightweight embankment blocks 1B and 1C are used to efficiently fill the space between lightweight embankment block 1A and the slope S. It is also possible to use one type of lightweight embankment block (for example, 1A) and fill the space between that block and the slope S with foundation concrete or the like.

[0044] In FIG. 3, the lightweight embankment blocks 1A, 1B, and 1C have the legs described in FIG. 2 formed on the bottom surface thereof.

[0045] The lightweight embankment blocks in the first row (bottom row) are placed on a concrete foundation (not shown) or the like, with their legs facing downwards. In FIG. 3, two lightweight embankment blocks 1A and one lightweight embankment block 1C are placed in a row along the x-axis direction on the first row. When placing these, a gap g is provided between the lightweight embankment blocks 1A and between the lightweight embankment blocks 1A and 1C. Furthermore, it is preferable to provide a gap g between the retaining wall 5 and the lightweight embankment blocks 1A.

[0046] The second tier of lightweight embankment blocks is placed on top of the first tier of lightweight embankment blocks with its legs facing downwards. In the second tier, two lightweight embankment blocks 1A, one lightweight embankment block 1B, and one lightweight embankment block 1C are arranged in a row along the x-axis direction, with a gap g between each lightweight embankment block. In addition, gaps g are also created between adjacent lightweight embankment blocks in the vertical direction (1A and 1A, 1A and 1A, 1B and 1C, 1C and 1C) by the legs of the lightweight embankment blocks on the upper tier.

[0047] Although not shown in the figure, lightweight embankment blocks are also arranged in the depth direction, and gaps are also provided between adjacent lightweight embankment blocks in the depth direction.

[0048] An example of the final configuration of stacked lightweight embankment blocks is shown in Figure 4. Figure 4 is a schematic diagram of an embankment structure constructed using the construction method of the present invention. As shown in Figure 4, the lightweight embankment blocks are stacked in a regular pattern, with the lightweight embankment blocks in each layer arranged in a row along the x-axis direction, with gaps between each lightweight embankment block. Furthermore, lightweight embankment blocks 1A are arranged in a row along the y-axis direction.

[0049] In Figure 4, the width of the gaps between adjacent lightweight embankment blocks in the x-axis direction and the depth direction need only be wide enough to allow the fluid filler to flow into the gaps, and is set to, for example, 30 mm to 200 mm, or may be 50 mm to 150 mm. The width of these gaps may be the same as the protruding height of the legs described above, or it may be smaller. Because the width of the gaps between adjacent lightweight embankment blocks in the x-axis direction and the depth direction extends vertically, it is easier to fill them than gaps (formed by the legs) that extend horizontally, and therefore it is thought that the gaps can be filled uniformly even if the width is smaller than the protruding height of the legs.

[0050] [Block filling process (S4)] In this process, fluid filler is filled into the gaps between the lightweight embankment blocks and hardened. As shown in Figure 4, fluid filler 6 is filled into the gaps between the lightweight embankment blocks and the gaps between lightweight embankment block 1A and retaining wall 5 and hardened, thereby integrally joining multiple lightweight embankment blocks 1A, 1B, and 1C to retaining wall 5 and constructing embankment structure 7.

[0051] Step S4 is preferably a step of filling and solidifying the fluid filler 6 over substantially the entire embankment structure 7 so that the surfaces of the lightweight embankment blocks 1A, 1B, and 1C are not exposed. The embankment structure 7 in Fig. 4 is covered over substantially the entire structure with the fluid filler 6 so that the surfaces of the lightweight embankment blocks 1A, 1B, and 1C are not exposed. This makes it possible to effectively suppress water absorption by the lightweight embankment blocks.

[0052] 4, gaps are provided between adjacent lightweight embankment blocks in the x-axis direction, y-axis direction, and depth direction, but it is sufficient if gaps are provided between at least some of the blocks. For example, some lightweight embankment blocks may be placed together without gaps to form a unit, in which case the unit may be covered with fluid filler 6 so that the surface of the unit is not exposed when viewed as a whole.

[0053] The fluid filler 6 is a fluid material that hardens over time, and it is preferable to use grout (non-shrinkage mortar). By using grout, the drying shrinkage of the fluid filler is suppressed, and the occurrence of voids caused by the drying shrinkage of the fluid filler between the lightweight embankment blocks or between the lightweight embankment blocks and the retaining wall is suppressed. Any known material for civil engineering and construction can be used as grout.

[0054] It is preferable to fill the fluid filler in multiple steps to make it easier to spread the fluid filler evenly in the gaps between the lightweight embankment blocks. For example, after arranging one layer of lightweight embankment blocks, fill the fluid filler until the gaps between the lightweight embankment blocks in that layer are filled and then solidify. Next, another layer of lightweight embankment blocks is placed on top of that, and the fluid filler is filled into that layer. In this way, the placement of the lightweight embankment blocks (step S3) and the filling of the fluid filler (step S4) may be repeated. The construction method of the present invention also encompasses such construction methods.

[0055] As shown in Fig. 4, in the embankment structure 7, the upper surface of the uppermost lightweight embankment block may be filled with the fluid filler 6 so as to be covered with the fluid filler 6. Alternatively, it may be covered with backfill soil or the like.

[0056] The embankment structure 7 is fixed to the natural ground by shear bolts (not shown) driven into the slope.

[0057] After constructing the embankment structure 7 as described above, concrete is poured on top of it as needed, and an asphalt roadbed is laid, thereby forming, for example, a road.

[0058] The construction method of the present invention is not limited to the method described above.

[0059] For example, in the arrangement of the lightweight embankment blocks, in step S3, the lightweight embankment blocks 1A are arranged in a row (vertical row) along the y-axis direction as shown in Figures 3 and 4, but for example, the lightweight embankment blocks 1A of any tier may be arranged in a staggered pattern, with the lightweight embankment blocks 1A of the tier above them offset in the x-axis direction. Specifically, the lightweight embankment blocks 1A of the tier above may be arranged offset in the x-axis direction from the lightweight embankment blocks 1A of any tier by a length equivalent to approximately half the dimension of the lightweight embankment blocks 1A of the tier above them.

[0060] Furthermore, in step S3, the reinforcing bolts fixed to the retaining wall may be inserted into the gaps between the lightweight embankment blocks. This will be explained using FIG. 5. FIG. 5 is an enlarged view of part A in FIG. 4. As shown in FIG. 5, a hole 3a is formed in the panel 3 along the horizontal direction, and a reinforcing bolt 8 is inserted into the hole 3a and fixed to the connecting member 4. In other words, the reinforcing bolt 8 is fixed to the retaining wall. The reinforcing bolt 8 is inserted into the gap g between the lightweight embankment blocks 1A, 1A. With the reinforcing bolt 8 inserted, fluid filler 6 is filled into the gap g in the subsequent step S4, whereupon the reinforcing bolt 8 is buried and solidified. As a result, the retaining wall and the lightweight embankment blocks can be more firmly joined. In this case, the fluid filler 6 may also be filled into the hole 3a and solidified.

[0061] While Figure 5 illustrates reinforcing bolts fixed to the retaining wall, shear bolts driven into the slope or accessory members fixed to them may be inserted into the gaps between the lightweight embankment blocks. In this case, with the accessory members inserted, fluid filler is filled into the gaps, and the accessory members are buried and solidified, thereby more firmly joining the slope and the lightweight embankment blocks.

[0062] In addition, in Figure 4 and other figures, the panels and lightweight embankment blocks that make up the retaining wall are stacked separately, but in step S1, for example, panels can be fixed integrally to one side of some of the prepared lightweight embankment blocks, and in step S2, the lightweight embankment blocks with the fixed panels can be stacked so that they are positioned at the forefront of the target area to form the retaining wall. This eliminates the need to stack panels separately, further improving workability. [Industrial Applicability]

[0063] The method for constructing an embankment structure of the present invention is a construction method that uses lightweight embankment blocks, which improves workability and allows for the construction of a practical embankment structure.Specifically, it can suppress the water absorption of the lightweight embankment blocks and suppress changes in the embankment structure over time, making it widely applicable to road embankments and the like. [Explanation of symbols]

[0064] 1, 1A, 1B, 1C Lightweight embankment blocks 2 legs 3 Panels 4 Connecting members 5. Retaining walls 6 Fluid filler 7 Embankment structure 8 Reinforcement bolts

Claims

1. A method for constructing an embankment structure using lightweight embankment materials, comprising: a lightweight embankment block preparation step of preparing a plurality of lightweight embankment blocks formed by pre-solidifying the lightweight embankment material; a block placement process of placing the lightweight embankment blocks at a target location where the embankment structure will be constructed, with gaps between each lightweight embankment block; a block filling step for filling the gaps between the lightweight embankment blocks with fluid filler and solidifying it.

2. A method for constructing an embankment structure as described in claim 1, characterized in that the block-to-block filling process is a process of filling and solidifying the fluid filler over almost the entire embankment structure so that the surface of the lightweight embankment blocks is not exposed.

3. The lightweight embankment block has a plurality of protruding, unconnected legs on any one surface, In the block placement step, the leg of the lightweight embankment block comes into contact with the surface of another adjacent lightweight embankment block, and the portion other than the contacting leg becomes the gap between the lightweight embankment blocks, 3. The method for constructing an embankment structure according to claim 1, wherein in the step of filling between the blocks, the fluid filler is filled into the gaps between the legs.

4. A method for constructing the embankment structure on a slope, a retaining wall forming step of stacking panels on the foundation blocks at the bottom of the slope to form a retaining wall before the block arranging step; the target location in the block placement step is a space between the retaining wall and the slope, A method for constructing an embankment structure as described in claim 1 or claim 2, characterized in that in the inter-block filling process, the fluid filler is filled and solidified, including into the gaps between the retaining wall and the lightweight embankment blocks.

5. A method for constructing the embankment structure on a slope, In the lightweight embankment block preparation step, a panel is fixed integrally to one surface of a part of the prepared lightweight embankment blocks, A method for constructing an embankment structure as described in claim 1 or claim 2, characterized in that in the block placement process, lightweight embankment blocks to which the panels are fixed are stacked so that they are positioned at the forefront of the target area to form a retaining wall.

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