JP5816420B2 - Retaining wall construction water storage block - Google Patents

Description

The present invention relates to a water storage block for retaining wall construction that supports slopes of embankments and cuts and slopes of natural ground.

The retaining wall stabilizes the slope against the back earth pressure, and a wall body having a necessary weight according to the stress is designed. At this time, if the weight is increased more than necessary, the supporting force is excessively required for the base, which increases the cost. Therefore, the minimum weight is generally set within an appropriate range that allows for a safety factor.

Not only the earth pressure from the back side but also the rainwater infiltrated into the spring water and the soil, and the water pressure due to the residual water after the increase in the river act on the retaining wall. If the amount of water behind the retaining wall becomes excessive, such as when there is a large amount of rainfall in a short period of time, the retaining wall has insufficient drainage capacity with respect to the amount of water flowing out from the slope on the back, and the retaining wall There is a risk of collapse. Therefore, it is general to provide a drainage hole penetrating before and after the retaining wall and increase the weight of the retaining wall itself to reduce the risk of collapse during heavy rain. In recent years, local and sudden torrential rains have frequently occurred, and the need to prepare a retaining wall with a higher weight has increased the cost of building a retaining wall.

On the other hand, for example, Patent Document 1 discloses a retaining wall that supports the slope with functionality. Patent Document 1 discloses a box-type hollow block for a retaining wall. Specifically, the retaining wall is constructed by stacking blocks having the inflow port 36 on the back surface and the drain port 61 on the bottom surface in multiple stages. The box-type hollow block of Patent Document 1 allows water to flow into the block from the back, uses the inside of the block stacked in multiple stages as a water channel, and has a drain outlet 29 disposed on the front wall of the lower drainage block 12. It is designed to prevent pedestrians from splashing water by draining from the area.

The box-type hollow block of Patent Document 1 is excellent in consideration of pedestrians and the like, but since the drainage port 29 is only at the lower stage, the drainage from the drainage block 12 is not in time during heavy rain, and it is retained. The wall could collapse. Patent Document 1 is a drainage block, not a water storage block.

On the other hand, Patent Document 2 discloses a box-type hollow block to which a water field function is added. This box-shaped hollow block has a bird inlet / outlet 4 at the front, a drain pipe 22 at the bottom, and a drain pipe 10 through which water flows in at the back. Water accumulates inside the block and serves as a watering place for birds.

Similarly to that of Patent Document 1, the box-shaped hollow block of Patent Document 2 does not take into account collapse during heavy rain. Specifically, among the blocks stacked in multiple stages, only the upper 11b is hollow and has a water field formed therein.

The present applicant has previously proposed a retaining wall in which box-shaped hollow blocks are stacked in multiple stages and filled with earth and sand as in Patent Document 3 and Patent Document 4. These retaining walls have excellent stability against earth pressure, but the retaining wall has a large weight and must be a strong base that can support it (Fig. 1, reference numeral 2 in Patent Document 3). It was.

JP 2000-282494 A JP 2006-37489 A JP-A-11-303105 JP 2001-348892 A

When it rains, rainwater is stored in the box-shaped hollow block to increase the weight of the retaining wall to reduce the risk of collapsing. It is an object of the present invention to provide a water storage block for retaining wall construction that can reduce the load and a retaining wall using the same.

The present invention is a box-shaped hollow block including a frame body and a bottom plate, and the frame body connects a front wall which is a front surface of a retaining wall, a back wall which is a slope side, and a front wall and a back wall. It consists of left and right side walls, a water inlet is provided on the back wall, an overflow port is provided on the front wall to keep the water level in the water storage block constant, and an overflow port provided on the front wall is provided on the left and right side walls. In the state where the retaining wall is constructed at a higher position, a communication hole is provided that allows the adjacent water storage blocks to communicate with each other in the left-right direction, and the bottom plate is provided with a small hole for dripping the water stored in the water storage block. Keeping the weight of the retaining wall increased until the water pressure on the back of the retaining wall drops so that the water introduced into the reservoir block through the small holes does not flow out quickly. Increases the weight of the retaining wall, and gradually draws water from the small holes when it is not raining. The empty retaining wall construction for water storage block internal water storage block by draining to solve the above problems. Further, the present invention is a retaining wall configured by stacking such retaining wall construction water storage blocks.

The retaining wall construction water storage block of the present invention is a retaining wall formed by stacking a plurality of retaining wall construction water storage blocks in front of a slope formed by cutting, embankment, etc., or a slope of natural ground. Prevent the occurrence of earth and sand disasters. The feature of the present invention is that the weight of the wall body is automatically adjusted according to the amount of water flowing out from the slope. That is, when the amount of water outflow during rainfall increases, water flows into the retaining wall construction storage block from the inlet of the back wall, stores water, increases the weight of the retaining wall, and collapses the retaining wall. prevent. Once the rain stops, the amount of water flowing out from the slope decreases, and when the water pressure on the back of the retaining wall decreases, the water in the retaining wall construction storage block is gradually drained to the outside, or due to natural evaporation Lighten. In other words, the outflow of water from the slope is reduced, the risk of collapsing the retaining wall is reduced, and the water in the water storage block is drained, reducing the weight of the retaining wall and reducing the load on the foundation. is there.

The drainage of the water stored in the retaining wall construction water storage block is carried out by a small hole or groove provided in the bottom plate, or the back wall inlet is located near the bottom plate, and the retaining wall construction storage block via the inlet Drain the water temporarily stored inside. In the latter case, when the retaining wall collapses during rain, the water pressure on the back surface of the retaining wall becomes higher, so there is no concern that the water in the retaining wall construction water storage block will flow backward.

The small holes provided in the bottom plate prevent the rainwater introduced into the retaining wall construction water storage block as a small diameter from flowing down quickly. In the case where a small groove (slit) is provided in the bottom plate, the width of the groove is reduced so that rainwater introduced into the retaining wall construction water storage block is not quickly washed away. Specifically, it is a small hole or groove that allows the stored rainwater to drip. As a result, the weight of the retaining wall is kept increased until the water pressure on the rear surface of the retaining wall is lowered, and when the supply of water from the rear surface of the retaining wall is stopped, the water is sequentially drained to the lower block, and the interior returns to the hollow state. When the small groove is provided on the bottom plate, the small groove may be formed on one plate, or a plurality of plates may be arranged to form the small groove therebetween.

The frame body and the bottom plate may be formed separately, and a gap may be provided at a connection portion between the frame body and the wall body, and rainwater may be allowed to flow into or drain from the retaining wall construction water storage block through the gap.

The diameter, number, and shape of the inlet provided in the back wall are not particularly limited, and the number, diameter, and shape may be such that rainwater or the like is not stored on the back surface of the retaining wall during rain. For example, the inlet may be formed by inserting a PVC pipe. Similarly, the diameter, number, and shape of the overflow port provided on the front wall are not particularly limited, and the diameter, number, and shape of the overflowing water should be sufficient to prevent the rainwater from collecting on the back of the retaining wall during rainfall. That's fine.

The position of the overflow opening provided on the front wall determines the water level in the storage block for retaining wall construction during rainfall. The height of the overflow outlet is appropriately determined according to the water retention capacity of the slope and the expected rainfall. If you want the retaining wall to have a large weight, the position of the overflow port should be high, and vice versa.

Inflow of rainwater, etc. to the water storage block is performed for each water storage block for retaining wall construction. Therefore, a large amount of water flows into the retaining wall at the portion where the amount of water flowing out from the slope is large, and the weight of the retaining wall increases accordingly. If the retaining wall is constructed using the retaining wall construction water storage block of the present invention, the self-adjusting function of its own weight can be provided. In addition, inflow of rainwater etc. from the block where rainwater etc. from the slope concentrates by providing a communication hole between adjacent retaining wall construction water storage blocks on the side wall higher than the overflow outlet on the front wall Rainwater etc. can escape to the storage block for retaining wall construction with few. Thereby, it can prevent effectively that a retaining wall collapses in the part where the outflow of rainwater etc. concentrates.

The shape of the retaining wall construction block is not particularly limited as long as it can construct a retaining wall having a necessary and sufficient strength and can appropriately store and drain water by providing a water inlet or an overflow outlet. For example, a block that is square in front view and square in plan view can be suitably used. Further, the front wall and the side wall portion may be rectangular in plan view, and the back wall may be arched, triangular, trapezoidal, or the like.

According to the present invention, effluent water from a slope can be temporarily stored in a retaining wall construction water storage block. Temporarily increasing the weight of the retaining wall with temporarily stored water can support the slope and effectively prevent the occurrence of landslides. When there is no spilled water from the slope, the weight of the retaining wall can be reduced to minimize the load on the base.

By providing the small hole or the small groove in the bottom plate, the water stored in the retaining wall construction water storage block can be gradually drained to the outside of the retaining wall. Thereby, the weight of the retaining wall can be reduced as the water pressure on the back surface of the retaining wall decreases.

When the frame body and the wall body are formed separately and the frame body is placed on the bottom plate, a gap is naturally formed between the bottom plate and the frame body. From there, it becomes possible to allow water to flow in or drain from the slope. Thereby, when the water pressure on the back surface of the retaining wall is high, water flows in to increase the weight of the retaining wall. On the other hand, when the water pressure on the back surface of the retaining wall is low, the weight of the retaining wall can be decreased.

By providing a communication hole that connects to the adjacent retaining wall construction storage block on the side wall that is higher than the overflow port, if the runoff from the slope becomes excessive, the adjacent retaining wall construction storage block It is possible to release excess water.

It is sectional drawing of the retaining wall constructed | assembled using the water storage block for retaining wall construction of this invention. It is a perspective view of the water storage block for retaining wall construction used for constructing the retaining wall of FIG. It is AA sectional drawing of the retaining wall of FIG. In order to show the positional relationship between the overflow port and the communication hole, FIG. 3 shows the overflow port for convenience of explanation. It is sectional drawing of the retaining wall constructed | assembled using the water storage block for retaining wall construction which provided the inflow port near bottom plate. It is sectional drawing which showed a mode that water was drained from the retaining wall of FIG. It is sectional drawing of the retaining wall constructed | assembled using the retaining wall construction water storage block which shape | molded the frame and the baseplate separately. It is sectional drawing which showed a mode that water was drained from the retaining wall of FIG. It is sectional drawing of the retaining wall constructed | assembled using the water storage block for retaining wall construction comprised so that cross-sectional shape might become a parallelogram. It is sectional drawing of the leaning retaining wall constructed | assembled using the water storage block for retaining wall construction comprised so that cross-sectional shape might become a rectangle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, the water storage block for retaining wall construction is simply referred to as a water storage block.

[Example 1: Figs. 1 to 3]
FIG. 1 is a cross-sectional view of a retaining wall 1 constructed by stacking multiple concrete water storage blocks 2 configured to have a rectangular cross-sectional shape. In Example 1, the water storage blocks 2 were stacked in four stages. Each water storage block 2 is configured to increase in depth from the lower level to the upper level so as to match the slope of the slope 3. Between the retaining wall 1 and the slope 3 is filled with cracked stone 4. A base 5 is provided under the retaining wall 1 to support the retaining wall 1.

As shown in FIG. 2, the water storage block 2 according to the first embodiment is a box-shaped hollow block having a square shape including a frame body 21 and a bottom plate 22. The frame body 21 includes a front wall 211 that is the front surface of the retaining wall 1, a back wall 212 that is a slope side, and left and right side walls 213 that connect the front wall 211 and the back wall 212 (the same applies to the embodiments described later). Box-shaped hollow block). The front wall 211 has one overflow port 211a, the left and right side walls 213 have one communication hole 213a, the back wall 212 has one inlet 212a, and the bottom plate 22 has one small hole 22a. is there. Although not shown, a small groove may be provided in the bottom plate 22 instead of the small hole 22a.

In the first embodiment, as schematically shown by the arrows in FIG. 1, rainwater or the like flows from the inlet 212 a of the back wall 212, and excess water is drained from the overflow port 211 a provided in the front wall 211. It has become. In Example 1, since the inflow port 212a is provided at a position higher than the overflow port 211a, the water level in the water storage block and the weight of the water storage block 2 are determined by the height of the overflow port 211a.

Further, the water storage block 2 of the first embodiment is configured such that the stored water in the water storage block 2 is dripped into the lower water storage block 2 from the small holes 22a provided in the bottom plate 22 as shown in FIG. The water in the water storage block 2 is finally drained to the outside through a small hole 22a provided in the lower water storage block 2. Thereby, as the supply of water from the back of the retaining wall decreases and the risk of collapse of the retaining wall decreases, the stored water is drained to the outside from the retaining wall 1 and the weight of the retaining wall 1 decreases. Yes.

Moreover, as shown in FIG.1 and FIG.2, the water storage block 2 of Example 1 is provided with one communicating hole 213a in the left and right side walls 213, respectively. Since the communication hole 213a is provided on the side wall at a position higher than the overflow port 211a, even if inflow of rainwater or the like is concentrated in a part of the retaining wall, as shown in FIG. It is possible to effectively prevent the water pressure from being excessively increased in part of the retaining wall 1 by escaping the stored water to the adjacent water storage block 2.

[Example 2: Figs. 4 to 5]
The second embodiment is based on the water storage block 2 of the first embodiment described above, and the concrete water storage block 2 in which the small holes 22a are removed from the bottom plate 22 and the inlet 212a of the back wall 212 is arranged near the bottom plate 22. It is. In the second embodiment, similarly to the first embodiment, the back surface of the retaining wall 1 is filled with the walnut stone 4, and the base 5 is provided under the retaining wall 1.

In the second embodiment, as schematically shown by the arrows in FIG. 4, rainwater or the like flows from the inlet 212 a of the back wall 212, and excess water is drained from the overflow port 211 a provided in the front wall 211. It has become. Accordingly, the water level in the water storage block and the weight of the water storage block derived therefrom are determined by the height of the overflow port 211a.

In the second embodiment, the inlet 212a is provided in the vicinity of the bottom plate 22, and the inlet 212a such as rainwater is also used as a drain outlet. When it is necessary to increase the weight of the retaining wall by causing rainwater or the like to flow into the retaining wall 1, the water pressure on the back surface of the retaining wall increases. Therefore, in such a case, there is no possibility that water flows backward from the inlet 212a to the slope 3 side.

When the rain stops or the water pressure on the slope side decreases, the stored water is gradually drained from the inflow port 212a as schematically shown by the arrows in FIG. Thereby, as the supply of water from the back of the retaining wall decreases and the risk of collapse of the retaining wall decreases, the stored water is drained to the outside from the retaining wall 1 and the weight of the retaining wall 1 decreases. Yes.

[Example 3: Figs. 6 to 7]
In the third embodiment, the water storage block 2 of the first embodiment is used as a basic configuration, the small holes 22a are removed from the bottom plate 22, and the frame body 21 and the bottom plate 22 are separately molded. In the third embodiment, the back wall of the retaining wall 1 is filled with the quarry stone 4 and the base 5 is provided under the retaining wall 1 as in the first embodiment.

The third embodiment is a concrete water storage block 2 that allows rainwater or the like to flow in from a gap formed by placing the frame body 21 on the bottom plate 22 and the inlet 212a and discharges the stored water from the gap. Similarly to the second embodiment, when it is necessary to increase the weight of the retaining wall by causing rainwater or the like to flow into the retaining wall 1, the water pressure on the back surface of the retaining wall increases. Therefore, in the case where the water pressure on the slope 3 is increased, there is no possibility that water flows backward to the slope 3 side from the gap. In order to increase the inflow speed of water from the back surface of the retaining wall, it is necessary to provide an inlet 212a on the back surface. Although the small holes 22a for drainage described in the first embodiment are not essential, they may be provided to adjust the drainage speed.

In the third embodiment, as schematically shown by the arrows in FIG. 6, rainwater or the like flows from the inlet 212 a of the back wall 212, and excess water is drained from the overflow port 211 a provided on the front wall 211. It has become. In the third embodiment, surplus water flowing from the back surface of the retaining wall 1 is mainly discharged from the overflow port 212a. Accordingly, the water level in the water storage block and the weight of the water storage block derived therefrom are determined by the height of the overflow port 211a.

When the rain stops or the water pressure on the slope side decreases, the stored water is gradually drained from the gap between the frame body 21 and the bottom plate 22 as schematically shown by the arrows in FIG. Thereby, as the supply of water from the back of the retaining wall decreases and the risk of collapse of the retaining wall decreases, the stored water is drained to the outside from the retaining wall 1 and the weight of the retaining wall 1 decreases. Yes.

The cross-sectional shape of the water storage block 2 of Examples 1 to 3 may be changed as shown in FIGS. 8 and 9 and configured as a retaining wall. In FIG. 8, the cross-sectional shape is a parallelogram. In FIG. 9, the cross-sectional shape is rectangular, and a retaining wall is formed by putting a foundation block 6 between the retaining wall 1 and the ground 5.

The water storage block 2 of the first to third embodiments increases its own weight by storing water during the rain to support the slope 3, and once the rain stops, the water is discharged to the outside to reduce its own weight and load on the base 5 It functioned as a water storage block 2 that can reduce the size.

1 Retaining Wall 2 Reservoir Block (Reservoir Block for Retaining Wall Construction)
21 Frame body 211 Front wall 211a Overflow port 212 Back wall 212a Inlet port 213 Side wall 213a Communication hole 22 Bottom plate 22a Small hole 3 Slope 4 Warrior stone 5 Base 6 Base block

Claims (2)

A box-shaped hollow block consisting of a frame and a bottom plate,
The frame body includes a front wall that is a retaining wall front surface, a back wall that is a slope side, and left and right side walls that connect the front wall and the back wall,
The back wall has a water inlet, the front wall has an overflow port to keep the water level in the water storage block constant, and the left and right side walls are higher than the overflow port on the front wall. In the state where the wall is constructed, a communication hole is provided that allows the adjacent water storage blocks to communicate with each other in the left-right direction, and the bottom plate is provided with a small hole for dripping the water stored in the water storage block.
Keeping the weight of the retaining wall increased until the water pressure on the back of the retaining wall drops so that the water introduced into the reservoir block through the small holes does not flow out promptly. Increase the weight of the wall,
Retaining wall construction storage block that empties the interior of the storage block by gradually draining water from small holes during non-rainfall . A retaining wall constructed by stacking the retaining wall construction water storage blocks according to claim 1.

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