JP4614928B2 - Lightweight embankment method - Google Patents

Description

The present invention relates to a lightweight embankment method applied to embankments on soft ground and inclined surfaces.

  When a road or a railway is constructed, construction is performed by embankment to form a road surface or a vehicle traveling surface that is higher than the surrounding ground.

  FIG. 37 shows a general embankment method. On the foundation ground surface GL, sand and crushed stone are added to high-quality soil, compacted with a vibrator, and then further compacted, and several layers are formed. Build and fill up. In the figure, W is the road width, B is the road shoulder, S is the slope, and SW is the slope width.

  In this way, on the road surface or the vehicle running surface where the embankment is performed, in addition to the earthquake and flood disasters, as shown in FIG. 38, the embankment natural collapse is often caused only by the passage of time. This is because the foundation ground surface GL becomes soft due to the heavy pressure of compacting the embankment and the weight and vibration of the vehicle, resulting in poor durability and depression. Moreover, the slope S of the embankment collapses and flows out to the side not receiving pressure.

  This phenomenon does not occur in the whole embankment construction at once, but there are places where the foundation surface is hard and soft, and the embankment becomes uneven along the vertical direction, so-called uneven settlement. In the 5 to 10 years after construction, the embankment has subsided and the slope has collapsed.

  The light weight embankment method is a method of reducing the load on the foundation ground by reducing the weight of the embankment body itself, in contrast to the conventional reinforced earth method that reinforces the weak foundation ground. As a typical construction method, there is an EPS (Expanded Poly-Styrene Method) construction method using expanded polystyrene as embankment material.

  The feature of the ESP construction method is that the density of polystyrene foam is super lightweight, so it can be constructed without using large machines, and there are merits such as proximity construction of important structures, influence on the surrounding environment, shortening of construction period, Moreover, since the uniaxial compressive strength is large and the self-supporting property is high, the lateral pressure is small.

  FIG. 39 is a sectional view of a road constructed by an EPS method using a polystyrene foam block. In this construction method, the entire embankment is lightened in a place where the foundation ground layer is soft, including the field, and many layers of foamed polystyrene blocks C are laminated to reduce the pressure and gravity from the embankment, thereby eliminating land subsidence. The shape and formation of the embankment is maintained. The construction method using this expanded polystyrene block C is disclosed by patent documents 1-4, for example.

  Patent Document 5 discloses that a foamed urethane layer is formed by forming a water permeable layer on a molded embankment construction place without foaming a polystyrene block and foaming a urethane foam stock solution on the water permeable layer. .

  Patent Document 6 discloses a foamed resin block for countermeasure against buoyancy in which a large number of through holes are provided in order to eliminate the weakness of the EPS construction method against buoyancy such as flooding.

JP-A-8-41883 JP-A-1-66316 JP-A-4-281919 Japanese Patent Laid-Open No. 5-118039 JP-A-6-33438 JP-A-8-144285

  40 to 42 are explanatory views showing a phenomenon caused by a defect in the shape of the expanded polystyrene layer used in the conventional EPS method. Conventionally, the shape of the expanded polystyrene block C is a rectangular parallelepiped, and the single unit is simply matched to the embankment shape and stacked.

  As shown in FIG. 40, there is no adhesion and comprehensiveness between the rectangular polystyrene foam block C and the soil of the slope S, the slope S collapses due to the weight of the soil, the slope is not formed, and the road surface is also vertical. Collapse in the direction.

  Further, in the conventional EPS construction method, the connection between the foamed polystyrene blocks C is not performed. Therefore, when an earthquake occurs, the foamed polystyrene blocks C are individually subjected to force as shown in FIG. . Even if it is a ridge in some places, the entire embankment will be destroyed.

  Further, as shown in FIG. 42, when the flood level WL reaches the road surface, the foamed polystyrene block C having a specific gravity extremely smaller than that of water receives buoyancy, and the embankment formation destruction occurs.

  On the other hand, paying attention to the slope of the side of the embankment structure, when the slope is formed only of soil, the soil particles are heavy, and at a certain height, the bonds between the stable particles break down, As shown in 43 (a), the soil slips at a regular angle. This phenomenon is called regular slip α. Further, when the soil contains water, as shown in FIG. 43 (b), the entire soil collapses like an avalanche and flows as shown in FIG. This is called arc slip β and may cause disasters such as landslides.

The present invention aims at providing a lightweight fill method that can in suppressing the embankment formation breakdown due to loose movement between the foamed resin block member.

In order to solve the above-mentioned problem, the first configuration of the present invention is that a foamed resin layer which is a single layer and has cavities provided at equal intervals is fitted with a fitting convex portion which does not come off in the horizontal direction. A plurality of light-weight embankment block members are connected to each other by a concave portion, and the foamed resin layer is laminated on the ground so that the cavities coincide with each other in the vertical direction. This is a lightweight embankment method characterized in that an adjustment block made of foamed resin is attached to the inside of the material to adjust the weight and strength of the entire embankment .

  In the first configuration, the plurality of block members are connected by the fitting convex portion and the fitting concave portion so as not to be removed in the horizontal direction to form one layer of the foamed resin layer. As a result, each block member is interconnected and integrated, so even if non-uniform loads and stresses act over time or earthquakes, some block members do not pop out or sink, Banking destruction is suppressed. This lightweight embedding block has a cavity, and when a plurality of lightweight embedding blocks are combined, the cavity becomes an upper and lower through-hole to reduce buoyancy, and earth and sand in the through-hole. The integration with the ground is strengthened by packing the quarry. Moreover, the through-hole can permeate rainwater into the ground, and can suppress the depletion of groundwater veins and the concentration of rainwater in the gutter.

  In addition, although foamed resin generally refers to expanded polystyrene (expanded polystyrene), a lightweight member obtained by foaming other synthetic resin materials can also be used.

The 2nd structure of this invention is a lightweight banking method in which the groove | channel along a horizontal direction is formed in the bottom face of the said block for lightweight banking in the 1st structure .
In this second configuration, it is possible to construct the horizontal belt in a state where the upper layer and the lower layer lightweight banking block are in close contact with each other by forming a groove for accommodating the thickness of the horizontal belt described later on the bottom surface of the lightweight banking block. I can .

According to a third configuration of the present invention , in the first or second configuration, a non- slip plate having a thickness smaller than the thickness of the foamed resin layer is disposed on a side portion of the foamed resin layer, and a soil layer is interposed therebetween. A lightweight embankment method characterized in that a plurality of steps are connected at predetermined vertical intervals to form a slope on the side of the foamed resin layer.

  In this third configuration, by connecting a plurality of anti-slip plates to the sides of the foamed resin layer and constructing the sloped sand layer between the anti-slip plates, The bond is strengthened and the slope collapse is suppressed. This suppresses regular slip and arc slip of the slope, stabilizes the slope, and enables a steep slope. The action of the cavity according to the third configuration is the same as that of the first configuration.

Fourth configuration of the present invention, in the second configuration, the foamed resin layer, between the concrete Tob lock installed on both sides of the free-standing straight high walls, a plurality of layers so that the cavity is matched to the vertical direction Laminating and interposing a horizontal belt fixed between the concrete blocks between the foamed resin layers, and installing a lightweight embankment block so that a groove of the lightweight embankment block is fitted to the horizontal belt, the concrete It is a lightweight embankment method characterized by constructing a lightweight embankment between blocks.

  In this fourth configuration, concrete retaining wall blocks are erected on both sides of the area where the embankment is to be constructed, and the foamed resin layer composed of the lightweight embankment block is disposed between the concrete retaining wall blocks. A plurality of layers are laminated so that the values coincide with each other in the vertical direction. At that time, by interposing a horizontal belt with both ends fixed to the concrete retaining wall block between each foamed resin layer, the concrete retaining wall block will receive the vertical load of the embankment in a self-supporting state, and the slope construction will be It becomes unnecessary.

According to a fifth configuration of the present invention, in the first to fourth configurations, a reinforcing material such as earth and sand or crushed stone is filled in a cavity in which a block made of foamed resin is not mounted among the plurality of cavities. And it is a lightweight embankment method characterized by reinforcing the strength of the whole embankment.
When nothing is filled in the vertically penetrating cavities in the laminated foamed resin layer, an excessive stress may be applied to the foamed resin layer depending on the load. Therefore, the strength of the whole embankment is reinforced by filling a part or all of the cavities with a reinforcing material.

According to the present invention, the block members are connected to each other by forming a foamed resin layer for one layer by connecting the plurality of block members so as not to be horizontally removed by the fitting convex portions and the fitting concave portions. Therefore, even if a non-uniform load or stress is applied due to the passage of time or an earthquake, some block members do not pop out or sink, and the embankment formation failure is suppressed. This lightweight embankment block has a cavity, and when a plurality of lightweight embedding blocks are combined in the vertical and horizontal directions, the top and bottom are arranged evenly in the vertical and horizontal directions in plan view. It becomes a through-hole penetrating into the ground, reducing buoyancy, and by integrating earth and sand and quarrying into the through-hole, integration with the ground is strengthened. Moreover, the through-hole can permeate rainwater into the ground, and can suppress the depletion of groundwater veins and the concentration of rainwater in the gutter.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a hollow polystyrene foam layer that is the main embankment of the present invention, FIG. 2 is a plan view showing a lightweight embankment block according to Embodiment 1 of the present invention, and FIG. 3 is a perspective view thereof. FIG. 4 is a plan view showing a state in which a plurality of lightweight embedding blocks are connected.

  In FIG. 1, reference numeral 1 denotes a foamed polystyrene layer composed of a foamed polystyrene plate, and 2 denotes a vertically penetrating cavity formed in the foamed polystyrene layer 1.

  The polystyrene foam layer 1 integrated as a single layer is stacked according to the shape of the embankment. The cavities 2 are rectangular in this example, and are provided at equal intervals. Sand and crushed stone are put into the cavity 2. Sand and crushed stone are added to the same height as the upper surface of the expanded polystyrene layer 1. Sand and crushed stone are high in strength and have sufficient durability against road and vehicle loads. In addition, the effects of running water and drainage due to rain and flooding are high, and even if water enters the embankment, it will not collapse.

  In addition, even when the water level rises above the road surface during floods, the sand and crushed stone in the uniformly arranged cavities 2 have a considerable weight, the friction with the expanded polystyrene layer 1 is large, and the buoyancy of the expanded polystyrene layer 1 is strong. Even if it works, the whole is balanced and the foamed polystyrene layer 1 does not rise. Further, even when an earthquake occurs, the entire foamed polystyrene layer 1 is shaken uniformly, releasing the force of the earthquake, and the foamed polystyrene layer 1 is not scattered or partially collapsed. Moreover, the expanded polystyrene layer 1 has an elastic ability to restore and has high durability against earthquakes. In this case, the weight of the whole embankment is reduced and the strength is adjusted by attaching a foamed polystyrene block (not shown) having the same shape as the cavity 2 to a part of the cavity 2 (including a part in the height direction). Can also be planned.

  In order to simplify the work of embankment construction, the expanded polystyrene layer 1 is divided into blocks, and the blocks are connected to form an integrated expanded polystyrene layer 1. The shape of the block is shown in FIGS. In FIG. 2, a lightweight embankment block (hereinafter simply referred to as a block) 10 according to the first embodiment basically has four corners of a rectangular parallelepiped in plan view cut out toward a central portion 11. 12 is formed in a cross shape, and four tip trapezoidal arm portions 13 are coupled to the central portion 11. At the tips of the four arm portions 13, a fitting convex portion 14 is formed on one of the opposing surfaces, and a fitting concave portion 15 is formed on the other side. The shape is a shape that does not come off, and the fitting convex portion 14 is fitted into the fitting concave portion 15 from above.

  As shown in FIG. 4, the entire foamed polystyrene layer is firmly integrated by fitting the fitting convex portion 14 and the fitting concave portion 15, and the block 10 is not pulled or laterally displaced. When the truncated quadrangular pyramid-shaped convex part 16 provided in the central part 11 is fitted into a concave part (not shown) provided in the lower surface part, the block 10 is stacked in two or three stages, This prevents the combination of the stacked blocks 10 from shifting back and forth and from side to side.

  Moreover, the cavity 2 formed by the cut part 12 of the adjacent block 10 exhibits the effect of the strength improvement of a banking structure, flowing water, and drainage by putting sand and crushed stone at the time of construction.

  FIG. 5 is a plan view showing a block according to Embodiment 2 of the present invention. The block 20 has a structure in which a hole 21 is provided in the inside thereof, the friction surface between the sand, crushed stone, and the block 20 entering the hole 21 is increased, and resistance to buoyancy of the block 20 is increased. Moreover, the fitting convex part 22 and the fitting recessed part 23 for connecting the adjacent block 20 are provided.

  FIG. 6 is a plan view showing a block according to Embodiment 3 of the present invention. This block 30 makes the hole 31 circular and speeds up the sand and crushed stone. Further, a fitting convex portion 32 and a fitting concave portion 33 for connecting adjacent blocks 30 are provided.

  FIG. 7 is a plan view showing a block of a reference example. The block 40 has a simplified structure by omitting the fitting type connection by the fitting convex part and the fitting concave part. The cut portion 41 is provided, which saves labor and time for the formation of a polystyrene block, manufacturing work, and reduces the cost of the block. However, since the blocks 40 are not connected, there is a risk of collapse after embankment construction. There is.

Next, the slope protection means according to the lightweight embankment method of the present invention will be described.
As described above, the soil particles are heavy, and when they reach a certain height, the bonds between the stable particles of the slope are broken, and a regular slip α is generated as shown in FIG. . Further, when the slope soil contains water, as shown in FIG. 43 (b), an arc slip β occurs.

  In the present invention, in order to suppress such regular slip α and arc slip β, as shown in FIG. 8A, a certain interval is provided on the conventional slope, and the thin anti-slip plate 50 is lowered. Stack from top to bottom. The anti-slip plate 50 sandwiched between the soils stops the movement of the regular slip α and the arc slip β of the soil and keeps the slope stable.

  As shown in FIG. 8B, the slope that is stabilized by the anti-slip plate 50 does not collapse even when it becomes a steep slope. However, since the non-slip plate 50 alone may be pushed out to the slope side due to the weight load of the soil, it is used in combination with the block 10 described above.

  The configuration of the anti-slip plate 50 is shown in FIG. 9A is a plan view, and FIG. 9B is a cross-sectional view taken along the line AA in FIG. The anti-slip plate 50 is formed of foamed polystyrene, and includes a connecting portion 51 and a flat plate portion 52. The connecting portion 51 is fitted into the cavity 2 of the block 10. The anti-slip plate 50 is formed with a hole 53 for coupling with the upper and lower soils and a protrusion 54 for increasing the friction between the surface soils.

  FIG. 10 is a plan view showing a state in which the block 10 and the anti-slip plate 50 are combined, and FIG. Thus, since the connection part 51 of the edge part of the anti-slip | skid board 50 is couple | bonded with the cavity 2 of the block 10, the anti-slip | skid board 50 is not pushed out of a slope by the weight of soil. Further, the cavity 2 of the block 10 acts to pull the anti-slip plate 50, and the slope is stabilized. The hole 53 of the non-slip plate 50 discharges moisture contained in the soil from rain and flood, and increases the stability of the slope. The ridges 54 increase the frictional resistance against the anti-slip plate 50 and the soil, and prevent the soil from flowing out and slackening due to the regular slip α of the soil. As a result, the slope can be steep.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
FIG. 12 shows a first block according to the fourth embodiment, where (a) is a plan view and (b) is a front view. FIG. 13 shows a second block according to the fourth embodiment, where (a) is a plan view and (b) is a side view. FIG. 14 is a plan view showing a state in which the first block and the second block are combined.

  In FIG. 12, the first block 60 has a rectangular shape in plan view, a fitting convex portion 61 is formed on one end in the longitudinal direction, a fitting concave portion 62 is formed on the other, and the width direction side is also formed. A fitting convex part 63 is formed on one of the parts, and a fitting concave part 64 is formed on the other. Further, a quadrangular frustum-shaped projecting portion 65 is formed at the center of the upper surface, and a recessed portion 66 complementary to the projecting portion 65 is formed at the center of the bottom surface. In addition, two grooves 67 along the width direction are formed on the bottom surface of the first block 60. A trapezoidal vertical groove 68 is formed on the side surface in the width direction.

  In FIG. 13, the second block 70 is shorter (approximately 1/3) than the first block 60, and a fitting convex portion 71 is formed on one of the opposing surfaces, and a fitting concave portion 72 is formed on the other. ing. A longitudinal groove 73 is formed on the side surface.

  The fitting concave portion 72 of the second block 70 is inserted into the fitting convex portion 63 formed on the side portion in the width direction of the first block 60 from above, and the fitting concave portion 72 of the first block is inserted into the fitting concave portion 64 of the first block 60. When the fitting convex portion 71 is inserted from above, a cross-shaped combination block as shown in FIG. 14 is obtained.

  An example of forming a foamed polystyrene layer using the first block 60 and the second block 70 is shown in FIGS. 15 and 16. When the first block 60 has a large size, for example, the length in the longitudinal direction is 1.8 m, the length in the width direction is 0.8 m, and the thickness is 0.5 m. In order to efficiently assemble this, as shown in FIG. 15, the first blocks 60 are first connected in the longitudinal direction and arranged in parallel at a predetermined interval. Next, as shown in FIG. 16, the first block 60 is connected in the width direction using the second block 70. Thereby, the polystyrene foam layer integrated in the horizontal direction can be formed.

  In the fourth embodiment, the light block is basically constructed by combining the first block 60 and the second block 70, but the third to sixth blocks shown in FIGS.

  FIG. 17 shows the third block 80, where (a) is a plan view, (b) is a front view, and (c) is a side view. The third block 80 has a quadrangular shape in plan view, and has a concave portion 80a into which a half of the protruding portion 65 of the first block 60 fits at the bottom end.

  FIG. 18 shows the fourth block 81, where (a) is a plan view and (b) is a side view. The fourth block 81 is a rectangular parallelepiped.

  FIG. 19 shows the fifth block 82, where (a) is a plan view and (b) is a side view. This fifth block 82 is for embedding in the hollow portion of the foamed polystyrene layer in which the first block 60 and the second block 70 shown in FIG. 16 are combined, and has a vertical convex portion 82a for filling the vertical grooves 68 and 73. is doing.

  FIG. 20 shows the sixth block 83, where (a) is a plan view and (b) is a side view. The sixth block 83 is for filling a cavity when the number of connected second blocks 70 connected in the width direction of the first block 60 is 3 or more, and has a vertical recess 83a for filling the vertical groove 73. Have.

  FIG. 21 and FIG. 22 show a non-slip plate base and a connecting plate that are fitted into a hollow portion at the width side (slope side) end of the expanded polystyrene layer to suppress slip of the slope.

  FIG. 21 shows the anti-slip plate base 84, where (a) is a plan view and (b) is a side view. The anti-slip plate base 84 includes a connecting portion 84a that is fitted in a cavity formed between the side portions of the second blocks 70 that are installed in parallel, and a protrusion 84b that increases friction between the upper and lower soils, It has a coupling recess 84c into which the coupling projection of the connecting plate fits.

  22A and 22B show the connecting plate 85, where FIG. 22A is a plan view and FIG. 22B is a side view. This connecting plate 85 greatly increases the friction between the upper and lower soils, the connecting convex portion 85a that fits into the connecting concave portion 84c of the anti-slip plate base 84, the connecting concave portion 85b that fits into the connecting convex portion 85a of the next connecting plate 85, and the like. It has the protrusion 85c for doing.

  FIG. 23 shows the combination of the first block 60, the second block 70, the third block 80, the fifth block 82, the anti-slip plate base 84, and the connecting plate 85 of the fourth embodiment to form the uppermost polystyrene foam layer and surface layer. It is the perspective view which showed the example to do. Five types of members are used, and the design and construction look complicated, but if the functions and effects of each member are understood, the construction is simple and proceeds smoothly. Since all the members are provided with connecting portions that do not come off in the horizontal direction, construction can be performed quickly, and the completed members are integrated into a solid embankment.

  FIG. 24 shows a first construction example using the first block 60 and the second block 70 according to the fourth embodiment, where (a) is a plan view and (b) is an A- in (a). It is A sectional drawing. In this first construction example, a foamed polystyrene layer is formed on the ground while connecting the first block 60 and the second block 70, and a part of the formed cavity 2 is filled with sand or crushed stone. It is intended to build an embankment that is integrated with. The other cavities 2 are left as cavities to reduce the weight.

  FIG. 25 shows a second construction example using the block according to the fourth embodiment, where (a) is a plan view and (b) is a cross-sectional view along line BB in (a). In the second construction example, as in the construction example 1, a foamed polystyrene layer is formed on the ground while connecting the first block 60 and the second block 70, and sand or a part of the formed cavity 2 is formed. Filled with crushed stone or earth and sand to construct a bank that is integrated with the ground, and after connecting the anti-slip plate base 84 and the connecting plate 85 to the slope portion to reinforce the slope, the third block 80 on the top, The fourth block 81 is set, a surface layer 86 is laid thereon, and a pavement layer 87 is further formed. Thereby, since the slope can be reinforced, the slope can be steep.

  FIG. 26 shows a third construction example using the block according to the fourth embodiment, where (a) is a plan view and (b) is a cross-sectional view taken along the line CC in (a). In this third construction example, as in construction example 2, the foamed polystyrene layer is formed on the ground while connecting the first block 60 and the second block 70, but one of the hollow portions of the foamed polystyrene layer on the ground side is formed. By installing the fifth block 82 and the sixth block 83 in the part, the strength of the ground is improved. Other configurations and operations are the same as those of the second construction example.

  Next, the embankment formation method of the self-supporting straight high wall which does not form a slope is demonstrated using FIGS. In these drawings, (a) is a front view and (b) is a plan view. FIG. 27 shows an example of a concrete block that forms a self-standing straight wall. In FIG. 27, a self-standing straight high wall is formed by the foundation blocks 90 and 91 having a low height (for example, 50 cm) installed on the concrete foundation and the wall block 92 having a high (for example, 1 m) stacked thereon. The foundation block 91 has a male shape and a female shape, and is abutted with each other to form an intermediate foundation block. Steel foundation anchors 93 for connecting a horizontal belt (described later) are embedded in the foundation blocks 90 and 91 and the wall block 92 at predetermined intervals, and vertical anchors 94 for preventing overturning project. It is inserted and connected to a hole (not shown) at the bottom.

  A self-standing straight wall embankment method using the foundation blocks 90 and 91 and the wall block 92 and the first block 60 and the second block 70 will be described with reference to FIGS. 28 to 35. In these drawings, (a) is a side view and (b) is a plan view.

  First, as shown in FIG. 28, a concrete foundation 100 is placed and sand is laid between the concrete foundations 100 on both sides with the level adjusted to the top edge.

  Next, as shown in FIG. 29, foundation blocks 90 and 91 are installed on the concrete foundation 100.

  Next, as shown in FIG. 30, a horizontal belt 101 made of steel material with rust prevention is fixed between the horizontal anchors 93 of the foundation blocks 90 and 91 on both sides by bolting or welding.

  Next, as shown in FIG. 31, the first block 60 is installed on the horizontal belt 101 while measuring the interval. At this time, the groove 67 (see FIG. 12) of the first block 60 is fitted into the horizontal belt 101.

  Next, as shown in FIG. 32, the second block 70 is installed between the first blocks 60.

  When the installation of the first block 60 and the second block 70 is completed between the base blocks 90 and 91, sand or crushed stone is put in the cavity formed by the first block 60 and the second block 70 as shown in FIG. Lay down.

  Next, as shown in FIG. 34, the wall surface block 92 is raised on the foundation blocks 90 and 91 by inserting the vertical anchor 94 into the hole at the bottom.

  Next, as shown in FIG. 35, the horizontal belt 101 is stretched horizontally, the first block 60 is installed, and the second block 70 is filled with sand or crushed stone in the same manner as the foundation, and this is repeated. To the design level.

  FIG. 36 shows the structure of embankment by the self-supporting straight wall in this construction example, (a) is a plan view, and (b) is a DD cross-sectional view in (a). In this example, an example in which the fifth block 82 is fitted in a part of the cavity is shown. Thus, since the foundation blocks 90 and 91, the wall surface block 92, the 1st block 60, the 2nd block 70, and the horizontal belt 101 (not shown) are integrated, the wall surface block 92 collapses outward. Therefore, it is possible to construct an embankment having a self-supporting straight wall with no slope.

  The present invention is a lightweight embankment block and a lightweight embankment construction method that can suppress embankment formation failure due to disjointed movement between polystyrene foam blocks and can suppress the collapse of the slope, for embankment construction of road and railway laying ground Can be used.

It is a perspective view of the foamed polystyrene layer which becomes the embankment main body used as the premise of this invention. It is a top view which shows the block for lightweight embankments which concerns on Embodiment 1 of this invention. It is a perspective view which shows the block for lightweight embankment which concerns on Embodiment 1 of this invention. It is a top view which shows the state which connected the block for several lightweight embankments. It is a top view which shows the block which concerns on Embodiment 2 of this invention. It is a top view which shows the block which concerns on Embodiment 3 of this invention. It is a top view which shows the block of a reference example. It is explanatory drawing which shows the suppression effect | action of the regular slip and circular arc slip by this invention. The structure of the anti-slip | skid board which concerns on embodiment of this invention is shown, (a) is a top view, (b) is AA sectional drawing of (a). It is a top view of the state which combined the block and slipper board which concern on embodiment of this invention. It is sectional drawing of the slope part of the installation state of the block which concerns on embodiment of this invention, and a non-slip board. The 1st block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a front view. The 2nd block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. It is a top view which shows the state which combined the 1st block and 2nd block which concern on Embodiment 4 of this invention. It is a perspective view which shows the example which forms a polystyrene foam layer using the 1st block and 2nd block which concern on Embodiment 4 of this invention. It is a perspective view which shows the example which forms a polystyrene foam layer using the 1st block and 2nd block which concern on Embodiment 4 of this invention. The 3rd block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a front view, (c) is a side view. The 4th block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. The 5th block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. The 6th block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. The anti-slip | skid board base part which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. The connection board which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is a side view. It is the perspective view which showed the example which forms the uppermost foamed polystyrene layer and surface layer using the member which concerns on Embodiment 4 of this invention. The 1st construction example using the 1st block and 2nd block which concern on Embodiment 4 of this invention is shown, (a) is a top view, (b) is AA sectional drawing in (a). is there. The 2nd construction example using the block concerning Embodiment 4 of the present invention is shown, (a) is a top view and (b) is a BB sectional view in (a). The 3rd construction example using the block which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is CC sectional drawing in (a). The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The embankment formation method of the self-supporting straight wall which concerns on Embodiment 4 of this invention is shown, (a) is a front view, (b) is a top view. The structure of the embankment by the self-standing straight wall in the construction example which concerns on Embodiment 4 of this invention is shown, (a) is a top view, (b) is DD sectional drawing in (a). It is sectional drawing which shows the general embankment construction method. It is sectional drawing which shows the embankment natural collapse by the time passage of a general embankment method. It is sectional drawing of the road constructed by the EPS construction method using the conventional polystyrene block. It is explanatory drawing which shows the phenomenon which arises by the defect of the shape of the polystyrene layer used for the conventional EPS construction method. It is explanatory drawing which shows the phenomenon which arises by the defect of the shape of the polystyrene layer used for the conventional EPS construction method. It is explanatory drawing which shows the phenomenon which arises by the defect of the shape of the polystyrene layer used for the conventional EPS construction method. It is explanatory drawing of the slip of the slope by the conventional EPS construction method.

Explanation of symbols

1 Styrofoam layer 2 Cavity 10 Lightweight embankment block (block)
11 central part 12 cut part 13 arm part 14 fitting convex part 15 fitting concave part 16 convex part 20 block 21 hole 22 fitting convex part 23 fitting concave part 30 block 31 hole 32 fitting convex part 33 fitting concave part 40 block 41 Cut portion 50 Non-slip plate 51 Connecting portion 52 Flat plate portion 53 Hole 54 Projection 60 First block 61 Fitting convex portion 62 Fitting concave portion 63 Fitting convex portion 64 Fitting concave portion 65 Protruding portion 66 Recessed portion 67 Groove 68 Vertical groove 70 Second block 71 Fitting convex portion 72 Fitting concave portion 73 Vertical groove 80 Third block 80a Recessed portion 81 Fourth block 82 Fifth block 82a Vertical convex portion 83 Sixth block 83a Vertical concave portion 84 Non-slip plate base portion 84a Connecting portion 84b Ridge 84c coupling recess 85 coupling plate 85a coupling projection 85b coupling recess 85c ridge 90,91 foundation block 92 wall block Click 93 horizontal anchor 94 vertical anchor 100 concrete foundation 101 horizontal belt

Claims (5)

A foamed resin layer that is a single layer and provided with cavities at equal intervals is formed by combining a plurality of light-weight embedding block members with fitting protrusions and fitting depressions that do not come off in the horizontal direction, A plurality of layers of the foamed resin layer are laminated on the ground so that the cavities coincide with the vertical direction, and an adjustment block made of foamed resin is mounted inside some of the cavities, A lightweight embankment method characterized by adjusting the overall weight and strength. The lightweight embankment method according to claim 1, wherein a groove along a horizontal direction is formed on a bottom surface of the lightweight embankment block. A non-slip plate thinner than the thickness of the foamed resin layer is connected to the side of the foamed resin layer in a plurality of stages at a predetermined vertical interval with an earth and sand layer interposed therebetween, The lightweight embankment method according to claim 1 or 2, wherein a slope is formed on the side portion. A plurality of layers of the foamed resin layer are laminated between the concrete blocks installed on both sides of the self-supporting straight wall so that the cavity coincides with the vertical direction, and the foamed resin layer is fixed between the concrete blocks between the foamed resin layers. A lightweight bank is installed by interposing a horizontal belt, the groove of the lightweight bank is fitted to the horizontal belt, and a lightweight bank is constructed between the concrete blocks. Lightweight embankment method described. From the plurality of cavities, a reinforcing material such as earth and sand or crushed stone is filled in a cavity where a block made of foamed resin is not mounted to reinforce the strength of the whole embankment. 4. The lightweight embankment method according to any one of items 4 .

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