Method for constructing an earth-filled structure

Abstract

A construction method using lightweight embankment blocks, which can improve workability and provide a practical embankment structure construction method. 【Solution means】A construction method of an embankment structure for constructing an embankment structure using lightweight embankment materials, comprising a lightweight embankment block preparation step (S1) of preparing a plurality of lightweight embankment blocks obtained by previously solidifying lightweight embankment materials, and a block placement step (S3) of placing the lightweight embankment blocks at a location where the embankment structure is to be constructed with a gap provided between each lightweight embankment block, and an inter-block filling step (S4) of filling the gap between the lightweight embankment blocks with a fluid filling material and solidifying it.

Description

Technical Field

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

Background Art

[0002] In the embankment of roads and bridges on soft ground, the retaining embankment at the tunnel entrance, etc., a lightweight embankment construction method is used. By making the embankment itself lighter with the lightweight embankment construction method, it is possible to reduce the earth pressure of the embankment. As the lightweight embankment construction method, an EPS method using expanded polystyrene blocks and methods using air-entrained lightweight materials (FCB method, N-SPC method, etc.) are known.

[0003] An example of the procedure of a conventional method using an air-entrained lightweight material will be described below with reference to FIG. 6. FIG. 6 shows a schematic view of constructing an embankment structure 31 on a slope S of natural ground and forming a road R thereon. (1) Shaping and excavation of the slope S of natural ground: Scrape and cut the surface layer. (2) Install a back drainage material on the natural ground and perform mortar spraying. (3) Perform steel bar insertion work (shear bolt 32) to stabilize the natural ground. (4) After excavating the foundation part, install a foundation block 33 and construct an anchor 34. (5) Install a panel 35, fix it with a connecting member, and perform water stop in the gap of the panel 35. (6) Arrange plant equipment at the construction site and place an air-entrained lightweight material 36 (air milk or air mortar) according to the height of the panel 35. (7) Repeat the above (5) and (6) until the construction reaches a predetermined height. In FIG. 6, the height positions of the air-entrained lightweight materials placed at each stage are shown by dotted lines, and the portion where the air-entrained lightweight material 36 is finally placed is shown by hatching. (8) After the placement of the air-entrained lightweight material 36 is completed, install a water barrier 37 (prime coat or waterproof sheet) on its upper surface.

[0004] In the construction method using the air bubble mixed lightweight material, for the quality control of the air bubble mixed lightweight material, at the construction site, the cement, air bubble material, water, and others used are tested and kneaded to determine the mixture ratio. Also, for each placement day, wetting temperature, air volume, flow value, and uniaxial compression tests are conducted. However, the work burden associated with quality control is large, and large-scale plant equipment is required at the construction site, so a great deal of labor and work processes are needed. In recent years, it has also been pointed out that there is a shortage of personnel and lack of experience among workers and management technicians in the construction industry. From this perspective as well, an improvement in workability in the construction of embankment structures is required.

[0005] As a method for addressing the problems in the construction method using the air bubble mixed lightweight material, a construction method using lightweight embankment blocks has been proposed. In this method, instead of adjusting the air bubble mixed lightweight material on-site, pre-blocked (for example, precast) lightweight embankment blocks are used.

[0006] For example, Patent Document 1 describes an embankment structure constructed by hierarchically stacking lightweight embankment blocks formed by mixing and solidifying fly ash, which is a recycled material, into a multi-prismatic body. The lightweight embankment blocks are, for example, hexagonal prisms, and other lightweight embankment blocks are stacked in a honeycomb shape adjacent to each surface. Also, when the lightweight embankment blocks are square prisms, a fitting recess is formed on the upper surface and a fitting protrusion is formed on the lower surface. When stacking vertically, the fitting protrusion of the upper block fits into the fitting recess of the lower block, and they are stacked regularly. Then, lightweight soil is filled and backfilled in the gap between the back side and the slope of the stacked lightweight embankment blocks.

[0007] Also, Patent Document 2 describes a lightweight embankment block having a fitting protrusion and a fitting concave groove on the outer surface, and having a geotextile embedded inside. These lightweight embankment blocks are stacked vertically and joined by applying prestress with a connecting member to form an embankment unit, and these embankment units are joined front, back, left, and right to form an embankment layer.

Prior Art Documents

Patent Document

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0009] As described above, by using lightweight earth retaining blocks, large-scale plant facilities such as aerated lightweight materials are not required at the construction site, and quality control associated with aerated lightweight materials (on-site mixing tests and quality control for each placement) is also no longer necessary.

[0010] However, although the method of using lightweight earth retaining blocks has the above-mentioned advantages, it has not been put into practical use as a method for constructing an earth retaining structure at present.

[0011] The present invention has been made in view of such circumstances, and is a construction method using lightweight earth retaining blocks, aiming to improve workability and provide a construction method for a practical earth retaining structure.

Means for Solving the Problems

[0012] In order to solve the above problems, the present inventors focused on the structure of lightweight earth retaining blocks in the conventionally proposed earth retaining structures. That is, since the lightweight earth retaining blocks are arranged (embedded) in a state where the surface of the blocks is exposed in the earth retaining structure, they are easily affected by the external environment, and aging due to this is considered. Specifically, it was considered that when the lightweight earth retaining blocks absorb water, the weight of the lightweight earth retaining blocks increases, which may lead to a decrease in block strength and an increase in earth pressure of the earth retaining structure. The present invention has been made based on such considerations.

[0013] The method for constructing an embankment structure of the present invention is 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 obtained by previously solidifying the lightweight embankment materials, a block placement step of placing the lightweight embankment blocks at a location where the embankment structure is to be constructed with a gap provided between each lightweight embankment block, and an inter-block filling step of filling the gap between the lightweight embankment blocks with a fluid filling material and solidifying it.

[0014] The inter-block filling step is characterized in that the fluid filling material is filled and solidified so that the surface of the lightweight embankment blocks is not exposed over substantially the entire embankment structure.

[0015] The lightweight embankment block has a plurality of protruding non-connected legs on any one surface, and in the block placement step, the legs of the lightweight embankment block contact the surface of another adjacent lightweight embankment block, so that the portion other than the contacting legs becomes the gap between the lightweight embankment blocks, and in the inter-block filling step, the fluid filling material is filled into the gap from between the legs.

[0016] One form of the method is a method for constructing the embankment structure on a slope, and before the block placement step, it has a retaining wall forming step of stacking panels on a base block at the lower part of the slope to form a retaining wall, the target location in the block placement step is the space between the retaining wall and the slope, and in the inter-block filling step, the fluid filling material is filled and solidified including the gap between the retaining wall and the lightweight embankment blocks.

[0017] Another form of the method is a method for constructing the embankment structure on a slope, and in the lightweight embankment block preparation step, a panel is integrally fixed to one surface of some of the prepared lightweight embankment blocks, and in the block placement step, the lightweight embankment blocks with the panel fixed are stacked so as to be located at the forefront of the target location to form a retaining wall.

Advantages of the Invention

[0018] The construction method of the embankment structure of the present invention is a method of constructing an embankment structure using a plurality of lightweight embankment blocks obtained by previously solidifying lightweight embankment materials. Large-scale plant facilities such as conventional air-entrained lightweight materials are not required at the construction site, and quality control associated with air-entrained lightweight materials (on-site mixing tests and quality control for each placement) is also unnecessary, and shortening of the construction period can be expected, etc., and the workability can be improved.

[0019] Furthermore, the above construction method includes a block placement step of arranging lightweight embankment blocks with a gap provided between each lightweight embankment block at a location where the embankment structure is to be constructed, and an inter-block filling step of filling the gap between the lightweight embankment blocks with a fluid filling material and solidifying it. Therefore, by the presence of the solidified fluid filling material in the gap between the lightweight embankment blocks, the lightweight embankment blocks can be integrally joined, and furthermore, at least a part of the surface of the lightweight embankment block is covered with the fluid filling material, so that the exposure of the surface of the lightweight embankment block can be suppressed. As a result, the aging due to water absorption of the lightweight embankment block can be suppressed, the decrease in block strength and the increase in earth pressure of the embankment structure can be suppressed, and a practical embankment structure can be obtained.

[0020] The inter-block filling step is a step of filling and solidifying the fluid filling material so that the surface of the lightweight embankment block is not exposed over substantially the entire embankment structure. Therefore, the surface of the lightweight embankment block is covered with the fluid filling material, and it becomes easier to further suppress the aging due to water absorption and the like.

[0021] The lightweight embankment block has a plurality of protruding and unconnected legs on any one surface. In the block placement step, by the legs of the lightweight embankment block contacting the surface of another adjacent lightweight embankment block, the portion other than the contacting legs becomes the gap between the lightweight embankment blocks, and the fluid filling material is filled into the gap from between the legs. Therefore, it becomes easier to surely interpose the fluid filling material in the gap between the lightweight embankment blocks adjacent in the height direction.

[0022] One form of the above method is a method of constructing an embankment structure on a slope. Before the block placement step, it has a retaining wall formation step of stacking panels on the foundation blocks at the lower part of the slope to form a retaining wall. In the block filling step, a fluid filling material is filled and solidified including the gap between the retaining wall and the lightweight embankment blocks. Therefore, in addition to the gaps between the lightweight embankment blocks, a solidified fluid filling material is also interposed in the gap between the retaining wall and the lightweight embankment blocks, and the retaining wall and the plurality of lightweight embankment blocks can be integrally joined, making it easier to ensure the strength of the entire embankment structure.

[0023] Another form of the above method is a method of constructing an embankment structure on a slope. In the lightweight embankment block preparation step, a panel is integrally fixed to one surface of some of the manufactured lightweight embankment blocks. In the block placement step, the lightweight embankment blocks with the panels fixed are stacked so as to be located at the forefront of the target location to form a retaining wall. Therefore, there is no need for the work of stacking the panels separately, leading to further improvement in workability.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0025] The construction method of the embankment structure of the present invention is a method using lightweight embankment blocks. This method can be an alternative to the method using aerated lightweight materials and can be applied to all locations where the method using aerated lightweight materials is being carried out. For example, in the construction of embankments for roads and bridges on soft ground, retaining embankments at the tunnel openings, etc., the construction method of the present invention can be applied.

[0026] An example of the construction method of the embankment structure of the present invention will be described with reference to the flowchart of FIG. 1. FIG. 1 shows an example of a method for constructing an embankment structure on a slope. This method includes a lightweight embankment block preparation step (S1), a retaining wall formation step (S2), a block placement step (S3), and a block gap filling step (S4). Note that the retaining wall formation step (S2) only needs to be performed before the block placement step (S3), and the order with the lightweight embankment block preparation step (S1) is not particularly limited. Also, the retaining wall formation step (S2) may be omitted as necessary.

[0027] Each step will be described below.

[0028] [Lightweight Embankment Block Preparation Step (S1)] In this step, a plurality of lightweight embankment blocks obtained by previously solidifying a lightweight embankment material are prepared. The lightweight embankment material is an embankment material that is lighter than ordinary soil. For example, aerated lightweight soil, expanded bead mixed lightweight soil, coal ash, granulated slag, etc. can be used, or a mixture of these appropriately can also be used. For example, aerated lightweight soil is obtained by mixing raw soil (sandy soil), cement, water, and a foaming agent and making it lighter.

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

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

[0031] In Fig. 2, the upper surface 1a and the side surface 1c of the lightweight embankment block 1 are formed as flat surfaces. On the other hand, a plurality of protruding and unconnected legs 2 are formed on the bottom surface 1b. The legs 2 are provided at the four corners and inside (the central part) of the bottom surface 1b, respectively, and a total of five are formed. The legs 2 provided at the four corners are formed such that the outer side surfaces are flush with the side surface 1c of the lightweight embankment block 1. Also, 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 Fig. 2, the shape of the legs 2 is square in plan view, but it is not limited to this. Also, the number and arrangement of the legs 2 can be appropriately changed according to the size of the lightweight embankment block and the like. Since the legs 2 are the parts that support the load, it is preferable to arrange the legs 2 so that the load is not uneven between the legs.

[0033] When a plurality of lightweight embankment blocks 1 are stacked in the height direction (the y-axis direction in Fig. 3), the legs 2 contact the upper surface of another adjacent lightweight embankment block below. In this case, gaps are formed between the lightweight embankment blocks in the portions other than the legs that are in contact with the other lightweight embankment blocks, and in the S4 process described later, the fluid filling material is filled into the gaps from between the legs 2. This lightweight embankment block 1 does not have a configuration in which it fits with adjacent lightweight embankment blocks and is arranged without gaps, like the lightweight embankment blocks described in Patent Document 1 and Patent Document 2, but has a configuration in which 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 and are individually formed, and are formed such that the fluid filling material can easily flow into the gaps between the lightweight embankment blocks.

[0035] In Fig. 2, the protruding heights h of the respective legs 2 are formed to be equal to each other. 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 filling material easily flows into the gap formed by the legs 2, and the load on the legs 2 can be easily reduced. The protruding height h of the legs 2 may be set to 50 mm to 150 mm. Further, 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, it is possible to suppress the change over time due to water absorption by covering at least a part of the surface with a fluid filling material. The lightweight embankment block 1 is made of, for example, aerated lightweight soil, and its density is, for example, 0.50 g / cm 3 ~0.80 g / cm 3 and may be 0.60 g / cm 3 ~0.75 g / cm 3 Note that the shape of the lightweight embankment block 1 is not limited to the configuration of Fig. 2, and may be cubic, or may have a shape other than a quadrangular prism shape.

[0037] [Retaining wall forming step (S2)] In this step, panels are stacked on the foundation blocks at the lower part of the slope to form a retaining wall. The foundation blocks (see Fig. 6) are installed after excavating the foundation part and are fixed by anchors pressed into the ground.

[0038] Fig. 3 shows a schematic view of a stage during the construction of the embankment structure of the present invention as an explanatory view of steps S2 and S3. Note that in Fig. 3 (similarly for Fig. 4), the illustration of foundation blocks, shear bolts, etc. is omitted. In Fig. 3, the x-axis direction indicates the front-rear direction of the embankment structure with respect to the slope S, and the y-axis direction indicates the height direction of the embankment structure.

[0039] As shown in FIG. 3, the retaining wall 5 is composed of a plurality of panels 3. The panel 3 is composed of a precast concrete plate, a concrete plate, a steel plate, a resin plate, etc. The size of the panel 3 is not particularly limited. For example, the height (vertical) is about 1000 mm and the depth (horizontal) is about 2000 mm. A plurality of panels 3 are connected in the height direction and the depth direction to form the retaining wall 5. The panel 3 has, for example, through holes in the height direction and is fixed to each other by a connecting member 4 (for example, an SPC rod) inserted through the through holes. The retaining wall 5 serves as a protective wall located on the front surface of the embankment structure.

[0040] At the connection part between the panels, in order to ensure watertightness, it is preferable to perform caulking treatment with a sealing material. In order to facilitate the construction of the caulking treatment, it is preferable that the upper end corners of the panel 3 are cut out with inclined surfaces.

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

[0042] [Block Arrangement Step (S3)] In this step, lightweight embankment blocks are arranged at the location where the embankment structure is to be constructed, with gaps provided between the lightweight embankment blocks. In this case, the location in the S3 step is the space between the retaining wall and the slope. The arrangement of the lightweight embankment blocks will be described with reference to FIG. 3.

[0043] In FIG. 3, a plurality of lightweight earth retaining blocks are arranged in the space between the retaining wall 5 and the slope S, and three types of lightweight earth retaining blocks are used. Specifically, a lightweight earth retaining block 1A that is rectangular in the xy-plane view, a lightweight earth retaining block 1B that is square in the xy-plane view, and a lightweight earth retaining block 1C that is trapezoidal in the xy-plane view are used. In FIG. 3, the lightweight earth retaining block 1A is mainly arranged, and the lightweight earth retaining blocks 1B and 1C are used to efficiently fill the space between the lightweight earth retaining block 1A and the slope S. Note that the space between one type of lightweight earth retaining block (for example, 1A) and the slope S may be filled with foundation concrete or the like.

[0044] In FIG. 3, the lightweight earth retaining blocks 1A, 1B, and 1C are each formed with the legs described in FIG. 2 on their respective bottom surfaces.

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

[0046] The lightweight earth retaining blocks in the second row are installed with their legs facing downward on top of the lightweight earth retaining blocks in the first row. In the second row, two lightweight earth retaining blocks 1A, one lightweight earth retaining block 1B, and one lightweight earth retaining block 1C are arranged in a row along the x-axis direction, and gaps g are provided between each lightweight earth retaining block. Also, gaps g are provided by the legs of the lightweight earth retaining blocks in the upper row between the lightweight earth retaining blocks adjacent in the height direction (1A and 1A, 1A and 1A, 1B and 1C, 1C and 1C).

[0047] Also, although not shown in the drawing, lightweight earth retaining blocks are arranged in the depth direction, and gaps are provided between the lightweight earth retaining blocks adjacent in the depth direction.

[0048] Then, an example of the structure in which lightweight embankment blocks are finally stacked is shown in FIG. 4. FIG. 4 is a schematic view of an embankment structure constructed by the construction method of the present invention. As shown in FIG. 4, the lightweight embankment blocks are regularly stacked, the lightweight embankment blocks in each stage are arranged in a row along the x-axis direction, and gaps are provided between the lightweight embankment blocks. Further, the lightweight embankment blocks 1A are arranged in a row along the y-axis direction.

[0049] In FIG. 4, the width of the gap between the lightweight embankment blocks adjacent in the x-axis direction and the depth direction may be any width as long as a fluid filling material can flow into the gap. For example, it is set to 30 mm to 200 mm, and may be 50 mm to 150 mm. The width of these gaps may be the same as the protruding height of the above-described legs, or may be smaller. Since the width of the gap between the lightweight embankment blocks adjacent in the x-axis direction and the depth direction extends in the vertical direction, compared with the gap extending in the horizontal direction (formed by the legs), it is easier to fill, so it is considered that even if the width of the gap is smaller than the protruding height of the legs, it can be filled uniformly.

[0050] [Block Interstitial Filling Step (S4)] In this step, a fluid filling material is filled into the gaps between the lightweight embankment blocks and solidified. As shown in FIG. 4, by filling and solidifying the fluid filling material 6 into the gaps between the lightweight embankment blocks and the gap between the lightweight embankment block 1A and the retaining wall 5, a plurality of lightweight embankment blocks 1A, 1B, 1C and the retaining wall 5 are integrally joined, and the embankment structure 7 is constructed.

[0051] It is preferable that the S4 step is a step of filling and solidifying the fluid filling material 6 so that the surfaces of the lightweight embankment blocks 1A, 1B, 1C are not exposed over substantially the entire embankment structure 7. The embankment structure 7 in FIG. 4 is covered with the fluid filling material 6 so that the surfaces of the lightweight embankment blocks 1A, 1B, 1C are not exposed over substantially the entire structure. Therefore, water absorption of the lightweight embankment blocks can be preferably suppressed.

[0052] In FIG. 4, it was described that gaps are provided between lightweight embankment blocks adjacent to each other in the x-axis direction, y-axis direction, and depth direction. However, it is sufficient that gaps are provided between at least some of the blocks. For example, some lightweight embankment blocks may be provided without gaps and unitized. In that case, it may be covered with the fluid filling material 6 so that the surface of the unit is not exposed when viewed as a whole unit.

[0053] The fluid filling material 6 is a fluid material that solidifies over time, and it is preferable to use grout (non-shrinking mortar). By using grout, the drying shrinkage of the fluid filling material is suppressed, and the generation of voids due to the drying shrinkage of the fluid filling material between the lightweight embankment blocks and between the lightweight embankment blocks and the retaining wall is suppressed. As the grout, those known as civil engineering and construction materials can be used.

[0054] The filling of the fluid filling material is preferably carried out in multiple steps in order to easily spread the fluid filling material evenly in the gaps between the lightweight embankment blocks. For example, after arranging the lightweight embankment blocks in one layer, the fluid filling material is filled until the gaps between the lightweight embankment blocks in that one layer are filled and solidified. Next, one layer of lightweight embankment blocks is arranged on top of that, and the fluid filling material is filled for that one layer. In this way, the arrangement of the lightweight embankment blocks (step S3) and the filling of the fluid filling material (step S4) may be repeated. The construction method of the present invention also includes such a construction method.

[0055] As shown in FIG. 4, in the embankment structure 7, the fluid filling material 6 may be filled so that the upper surface of the uppermost lightweight embankment block is covered with the fluid filling material 6. Also, it may be covered with backfill soil or the like.

[0056] Note that 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, if necessary, concrete is placed thereon and an asphalt roadbed is laid, etc., to form, for example, a road.

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

[0059] For example, regarding the arrangement of the lightweight embankment blocks, in the S3 step, as shown in FIGS. 3 and 4, the lightweight embankment blocks 1A were arranged in a single row (vertical row) along the y-axis direction. However, for example, the lightweight embankment blocks 1A at any stage and the lightweight embankment blocks 1A in the upper stage may be arranged in a staggered pattern shifted in the x-axis direction. Specifically, for the lightweight embankment blocks 1A at any stage, the lightweight embankment blocks 1A in the upper stage may be arranged with a shift in the x-axis direction by a length corresponding to approximately 1 / 2 of their dimension.

[0060] Also, in the S3 step, the reinforcing bolts fixed to the retaining wall may be inserted into the gaps between the lightweight embankment blocks. This will be described with reference to FIG. 5. FIG. 5 is an enlarged view of part A of FIG. 4. As shown in FIG. 5, holes 3a are formed in the panel 3 along the horizontal direction, and the reinforcing bolts 8 are inserted into the holes 3a and fixed to the connecting member 4. That is, the reinforcing bolts 8 are fixed to the retaining wall. These reinforcing bolts 8 are inserted into the gap g between the lightweight embankment blocks 1A, 1A. When the fluid filling material 6 is filled into the gap g in the subsequent S4 step in the state where the reinforcing bolts 8 are inserted, the reinforcing bolts 8 are buried and solidified. As a result, the retaining wall and the lightweight embankment blocks can be more firmly joined. In this case, the holes 3a may also be filled with the fluid filling material 6 and solidified.

[0061] In FIG. 5, the reinforcing bolts fixed to the retaining wall were described, but shear bolts cast on the slope or the attached members fixed thereto may be inserted into the gaps between the lightweight embankment blocks. In this case, with the attached members etc. inserted, the fluid filling material is filled into the gap, and the attached members etc. are buried and solidified, whereby the slope and the lightweight embankment blocks can be more firmly joined.

[0062] Also, in FIG. 4 and the like, the panels constituting the retaining wall and the lightweight embankment blocks are stacked separately. However, for example, in the S1 step, a panel is integrally fixed to one surface of some of the prepared lightweight embankment blocks, and in the S2 step, the lightweight embankment blocks with the panel fixed are stacked so as to be located at the forefront of the target location to form a retaining wall. This eliminates the need for the separate stacking operation of the panels, leading to further improvement in workability.

Industrial Applicability

[0063] The method for constructing the embankment structure of the present invention is a construction method using lightweight embankment blocks. It can improve workability and construct a practical embankment structure. Specifically, since it can suppress the water absorption of the lightweight embankment blocks and suppress the change over time of the embankment structure, it can be widely applied to road embankments and the like.

Explanation of Reference Numerals

[0064] 1, 1A, 1B, 1C Lightweight embankment blocks 2 Legs 3 Panels 4 Connecting members 5 Retaining wall 6 Fluid filling material 7 Embankment structure 8 Reinforcing bolts

Claims

1. A method for constructing an embankment structure using a lightweight embankment material, comprising: A lightweight embankment block preparation process for preparing a plurality of lightweight embankment blocks formed by previously solidifying the lightweight embankment material; A block arrangement process of arranging the lightweight embankment blocks at a target location where the embankment structure is to be constructed, with gaps between each of the lightweight embankment blocks; and a block filling step of filling and solidifying a fluid filler into the gaps between the lightweight embankment blocks, 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 the adjacent lightweight embankment block, and the portion other than the leg becomes the gap between the lightweight embankment blocks. In the inter-block filling step, the fluid filler is filled into the gaps between the legs. A method for constructing an embankment structure.

2. 2. A method for constructing an embankment structure as described in claim 1, characterized in that the inter-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. A method for constructing the embankment structure on a slope, comprising: A retaining wall forming step is provided before the block arranging step, in which a retaining wall is formed by stacking panels on the foundation blocks at the lower part of the slope, 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.

4. A method for constructing the embankment structure on a slope, comprising: 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 as to be positioned at the forefront of the target area to form a retaining wall.

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