JPS6332164Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an overhanging walkway block made of concrete that is laid, for example, at the edge of an elevated walkway.

Traditionally, in order to create a sidewalk along the edge of a road that runs through an irrigation canal or into a rice field, it was necessary to fill in the irrigation canal or the rice field.
Since sidewalks with such a structure are created by reclaiming irrigation canals and rice fields, they require a lot of effort and expense, and moreover, the irrigation canals and the like become useless.

BACKGROUND OF THE INVENTION Conventionally, there is a method of constructing a sidewalk by overhanging the edge of an elevated road (roadway) that is higher than the surrounding area without reclaiming irrigation canals, rice fields, etc., for example, there is a structure shown in FIG. First, foundation block A is formed by pouring fresh concrete on site.
and a concrete projecting beam B to be placed and fixed on the top surface of the foundation block A. It is formed from anchor bolts C and D planted on the top surface.

The case of creating sidewalk E will be described below with reference to Figure 2.

First, the soil at the edge of the roadway F is excavated to form an excavated portion G having a substantially L-shaped cross section. Next, pour ready-mixed concrete into this excavated portion G to create base concrete H.
form. Thereafter, the formwork J ₁ and J ₂ are placed facing each other on the base concrete H, and the formwork J ₁ ,
Reinforcement work is performed by arranging several main reinforcements K in succession within _J2 , and then arranging distribution reinforcements L at approximately equal intervals perpendicular to these several main reinforcements K. After that, anchor bolts C and D for fixing the overhanging beam B are measured and installed, and fresh concrete N is continuously poured and hardened between formworks J ₁ and J ₂ . As a result, a continuous basic block A was formed after curing.
Then, the anchor bolts C and D, which have been positioned on the foundation block A, are inserted into several bolt insertion holes O and P previously provided in the base b of the overhanging beam B, and the bolts C and D are inserted into the bolt insertion holes O and P, respectively. Place mortar Q inside P and harden it. Then, the overhanging beam B is fixed to the upper surface of the foundation block A by screwing nuts onto the anchor bolts C and D through washers. Furthermore, a sidewalk E is created by paving the surface of one side of the overhanging beam B and the soil backfilled in the excavated portion G with asphalt R and Z.

However, in the conventional product described above, in order to form the foundation block A, it is necessary to pour fresh concrete N into the formworks J ₁ and J ₂ assembled on site, and then remove the formworks J ₁ and J ₂ again. It takes time and money. In addition, in order to continuously reinforce the foundation block A structurally, it is necessary to measure and lay the respective installation positions of the main reinforcement K and the distribution reinforcement L placed perpendicularly to the main reinforcement K, so it is necessary to install reinforcement It was time consuming. Similarly,
The installation position of the anchor bolts C and D has to be determined continuously, which is time-consuming.

Furthermore, it was time-consuming because concrete had to be poured continuously and uniformly. As described above, the conventional product described above has the disadvantage that it takes a long time to construct the sidewalk E. Therefore, construction work could not be carried out quickly even in areas with heavy traffic.

In addition, because the installation positions of anchor bolts C and D vary within foundation block A, the distance between projecting beams B may differ between the one placed at hand and the one placed several hundred meters away from the inside (roadside side). The outside (sidewalk side) was uneven, and it was not possible to create a sidewalk accurately along the road. Particularly when constructing sidewalk E along a curve, it was difficult to lay formwork J ₁ and J ₂ , and to lay and position anchor bolts C, D, main reinforcement K, distribution reinforcement L, etc. .

In addition, since foundation block A and overhanging block B are made of concrete, they are heavy, and as overhanging block B protrudes outward from foundation block A, the overhanging block is placed on one side of the upper part of foundation block A. The load on material B becomes unstable, and since the foundation block A is not fixed to the excavated part G, the ground may become loose due to high moisture content, or may be affected by earth pressure, vibrations from automobiles, earthquakes, etc. There were structural weaknesses such as foundation block A and overhanging beam B slipping and leaning when external force is applied or internal stress is applied such as expansion of fresh concrete that is poured and hardened. .

The present invention was developed in view of the above points, and its purpose is to form the foundation block itself into a rigid frame structure to make the structure robust, and to make the reinforcement work of the main reinforcement opposite to the foundation block. It can be quickly and reliably moved to a predetermined position between the leg parts, and does not require a special formwork, and is surrounded by the opposing leg parts and the connecting member that connects the leg parts, so that almost the entire area is covered in the excavation part. By pouring fresh concrete into the opened space of the foundation block and hardening it, the ground contact area of the fresh concrete with the excavated area is increased, and the foundation block is not exposed to external forces such as earth pressure and vibrations from automobiles, and the fresh concrete is The foundation block can be firmly fixed to the excavated part without slipping due to internal stresses such as expansion during curing and solidification, and if necessary, excess material contained in the ready-mixed concrete after pouring can be removed between the leg parts. By draining water and excess moisture such as rain that accumulates on the roadway surface to the road shoulder, it prevents the foundation blocks from being eroded by water and cracking, and also prevents the ground at the excavated area from loosening due to excess moisture. In addition, the trouble of installing anchor bolts, the positioning work required for this, and the work of attaching the projecting crosspiece to the foundation block are omitted, making it suitable for use in narrow spaces. To provide an overhanging sidewalk block whose width can be freely constructed regardless of whether it is straight or curved.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 8.

Reference numeral 1 designates an elevated roadway with an irrigation canal flowing along its edge or a path through a rice field, and reference numeral 2 designates a sidewalk to be constructed at an elevated position on the edge of the roadway 1. Reference numeral 3 denotes an excavated portion having a substantially L-shaped cross section, which is formed by excavating the soil at the edge of the roadway 1 when constructing the sidewalk 2. 4 is a concrete foundation block, and this foundation block 4 has opposed leg parts 5 and 6.
and the two connecting members 7, 7 that connect the leg parts 5, 6, the whole exhibits a rigid frame structure, and is surrounded by the opposing leg parts 5, 6 and the connecting members 7, 7. a space portion 4a serving as a waste formwork having an opening on the lower surface that opens over substantially the entire area of the excavation portion 3;
Furthermore, it is formed from a top plate part 9 extending outward from the upper part of the foundation block 4.

7a has several stages at opposing positions of the connecting members 7, 7,
The insertion holes 7a are provided in several rows, and the main reinforcing bars 8 are inserted into the insertion holes 7a, which coincide with each other in the axial direction. The number of insertion holes 7a is not limited to those shown in the drawings, but is plural. Further, among the leg parts 5 and 6, the leg part 5 on the rear side (roadway side) is thicker and heavier than the other leg part 6, so that it is stabilized without being tilted. Reference numeral 9 denotes a top plate portion, and this top plate portion 9 is formed perpendicularly to the upper surfaces of two projecting beam portions 9A, 9A projecting to the outside of the upper portion of the foundation block 4. Further, the longitudinal edge of this top plate part 9 is formed with a downward slope part 9B which can freely collide with a substantially triangular cross section as shown in FIG. 8 when the foundation blocks 4 are connected to each other. There is. Reference numeral 10 denotes a ground covering, and this ground covering 10 is adhered and solidified to the outer edge and upper surface of the top plate portion 9 using mortar, anchor bolts, and the like. Further, although this ground cover 10 is usually formed of concrete, the inside thereof may be hollowed out as necessary to make it lightweight, although it is not shown in the drawings. Reference numeral 9C denotes a positioning protrusion provided on the outer edge of the top surface of the top plate portion 9, and the ground cover 10 is attached to this protrusion 9C.
By fitting into the recessed portion 10A provided on the lower surface of the base plate 1, the mounting position of the ground cover 10 to the top plate portion 9 is determined. Numerals 6A and 9D are knock-out type (thin-walled recesses) provided on the top plate portion 9 and the leg portion 6 facing the road shoulder. Among these, the drain hole 6A is a drainage hole for removing excess water contained in the fresh concrete 18 and the roadway 1 after pouring the fresh concrete 18 that is poured and hardened between the leg parts 5 and 6. This is to drain excess moisture that accumulates on the top surface of the road to the roadside. 11 is the two connecting members 7, 7
This is a step formed over the upper surface of the leg portion 5 and the leg portion 5. Reference numeral 10B denotes a mounting hole provided in the ground cover 10, into which the guide shelf 13 is erected by inserting the lower end of the support column 12 and filling and solidifying concrete. 14 is a guide rail, and 15 is a support thereof.

One embodiment of the present invention has the above-mentioned configuration, and in order to create the sidewalk 2, first an excavation portion 3 having a substantially L-shaped cross section is formed at the edge of the roadway 1. Next, base concrete 16 is poured into the excavated portion 3 and the roadway 1 is
A large number of foundation blocks 4 are arranged in parallel along the road. In this case, since the leg part 5 on the rear side (roadway side) of the foundation block 4 is thicker and heavier than the leg part 6 on the other side (sidewalk side), the top plate part provided on one side of the upper part of the foundation block 4 9 and the overhanging crosspieces 9A, 9A will not become unstable and the foundation block 4 will not fall down from the excavation part 3. Further, the slope portion 9B formed at the longitudinal edge of the top plate portion 9 of the adjacent foundation block 4 is formed downward, so that when the foundation blocks 4 are connected to each other, the cross section becomes approximately triangular as shown in FIG. The mortar M is formed so that it can collide freely so that the contact area with the bonding agent such as concrete is increased and the surface plate portions 9 arranged in parallel along the curve are formed so that they do not flow off. Even if it is opened on the outside, the mortar M will not leak out. After that, a plurality of insertion holes 7 are drilled in several stages and rows in the connecting members 7, 7 between the opposing leg parts 5, 6.
Several main reinforcements 8 are arranged between the leg portions 5 and 6 of the foundation blocks 4 arranged in parallel by inserting the main reinforcements 8 into the sections a. In this case, the connecting members 7, 7 of the foundation blocks 4 arranged in parallel have insertion holes 7 in several stages and rows.
Since the main reinforcing bars 8 are provided, the main reinforcing bars 8 are naturally positioned and placed at predetermined positions between the opposing leg parts 5 and 6. Then, when fresh concrete 18 is poured continuously between the leg parts 5 and 6 of each foundation block 4 installed in parallel, the ready-mixed concrete 18 connects the opposing leg parts 5 and 6 to the leg parts 5 and 6. The water is injected into the excavated part 3 through the space 4a, which is surrounded by the connected connecting members 7, 7, whose lower surface is opened over almost the entire area, and has a large ground contact area with the excavated part 3. The foundation block 4 is firmly fixed. Therefore, the foundation block 4 is subjected to earth pressure,
It can be firmly fixed to the excavated part 3 without slipping when subjected to external forces such as vibrations and earthquakes when a car is running, or when subjected to internal stress such as expansion of fresh concrete 18 when curing and solidifying. .
Moreover, the main reinforcement 8 can be easily positioned by being inserted into a plurality of insertion holes 7a bored at opposing positions of the connecting members 7, 7 that connect the leg parts 5, 6 of the foundation block 4. The leg parts 5, 6 are supported by the connecting members 7, 7 that connect the material parts 5, 6, and are reinforced regularly between the leg parts 5, 6, and the connecting members 7, 7 orthogonal thereto face each other. By connecting the spaces and creating a rigid frame structure, ready-mixed concrete 1
8 is poured and solidified, so that the foundation blocks 4 are firmly connected in a continuous state. Then excavation part 3
is backfilled with soil 19, and a ground cover 10 is fixed along the outer edge and upper surface of the top plate portion 9 using mortar, concrete, or the like. In this case, the upper surface of the top plate portion 9,
Since the ridge 9C is formed on the outer edge, the ridge 9C is fitted into the recess 10A provided on the lower surface of the ground cover 10, thereby fixing the ground cover 10 to the top plate portion 9. In addition, the ground may be loose due to a large amount of water contained in the excavated portion 3, or water such as rainwater may easily accumulate on the roadway 1, or the opposing leg portions 5 and 6
If the moisture content of the fresh concrete 18 that is poured and hardened during the process is higher than the required amount, several knock-out type drainage holes 6A are formed by punching out the thin walled parts as necessary. By doing so, moisture that collects on the upper surface of the roadway 1 through this drainage hole 6A and the fresh concrete 1 that is poured and hardened between the leg parts 5 and 6 are removed.
8 Remove the moisture. As a result, the foundation block 4 is prevented from being eroded by water, cracks are prevented from being accelerated, and moisture such as rainwater accumulated on the roadway 1 is drained to the road shoulder, thereby preventing the excavated portion 3 from being eroded by water.
Prevent the soil from loosening due to excessive moisture content.

Also, water that accumulates on the sidewalk 2 can be drained by punching out the drain holes 9D.

After that, in the case of a so-called mound up type where there is a step between the sidewalk 2 and the roadway 1, curb stones ₁₉₁ are installed in parallel at a certain distance from the ground cover 10, and then Pave asphalt 20 up to the curb 19 ₁ , and install the mounting hole 1 of the ground covering 10.
After inserting the lower end of the pillar 12 of the guide shelf 13 into 0B, the pillar 12 is erected by filling fresh concrete and solidifying it to form the guide shelf 13, and the sidewalk 2
Create. In addition, the backfilled soil 19 on the road 1 side
Pave asphalt 21 on the top surface to create roadway 1. (See Figure 6).

Furthermore, when constructing a so-called flat type sidewalk 2 in which the sidewalk 2 and the roadway 1 are flat, the lower ends of the supports 15 are placed a certain distance away from the ground cover 10 when pouring the fresh concrete 18 mentioned above. The guide shelf 14 on the roadway 1 side is formed by inserting and erecting it, and the lower end of the support column 12 of the guide shelf 13 is inserted into the mounting hole 10B of the ground covering 10 and filled with ready-mixed concrete, thereby forming the sidewalk 1. Side guide shelf 13
form. Thereafter, a sidewalk 2 and a roadway 1 are created by paving asphalt 20 on the top surface of the soil 19 that has been backfilled from the top surface of the surface board 9.

In addition, in the basic block 4 of the above embodiment, the leg portion 6
Although the top plate part 9 is integrally formed on the upper and outer side, if several projecting crosspieces 9A, 9A are provided on the outside of the leg part 6, the top plate part 9 can be separated from the foundation block 4. The top plate portion 9 may be fixed to the upper surface of the projecting crosspiece portions 9A, 9A by being provided on the body.

9 and 10 show another embodiment of the present invention. In this embodiment, the connecting members 7, 7 connected between the opposing leg parts 5, 6 are connected to the leg parts 5, 6. By forming the connecting members 7, 7 of the adjacent foundation blocks 4 in parallel with the side surfaces of the connecting members 6, the connecting members 7, 7 of the adjacent foundation blocks 4 are brought into contact with each other, thereby facilitating the mutual positioning of the foundation blocks 4. By inserting the main reinforcing bars 8 into the several insertion holes 7a, the main reinforcing bars 8 are automatically positioned accurately between the leg parts 5 and 6 serving as a waste form frame, and the reinforcement work can be carried out efficiently. Although similar to the example, in this example, the insertion hole 7a provided in the connecting member 7
In addition to inserting the required number of main reinforcements 8 into the base block 4 and arranging reinforcement between the leg parts 5 and 6, the insertion holes 7a are used to connect the adjacent foundation blocks 4 with bolts and nuts 30.
This embodiment differs from the first embodiment in that they are continuously and firmly connected to each other.

As mentioned above, in the present invention, the foundation block is formed into a rigid frame structure by connecting the opposing leg parts using the connection member, so that the foundation block itself can be structurally robust, and the By providing an insertion hole in the position, the main reinforcement can be placed in the specified position quickly and reliably by simply inserting the main reinforcement into the insertion hole. Moreover, fresh concrete is poured continuously into the space between the opposing leg parts of the foundation block without the need for special formwork, and the fresh concrete is poured into the excavated area without removing the formwork after curing. By increasing the ground contact area for the concrete, it is possible to firmly fix the foundation block with the protruding crosspiece on the outside to the excavated part formed at the edge of the roadway, and it will not be exposed to external forces such as vibrations from automobiles, and the fresh concrete will not cure or solidify. It is possible to create a sidewalk without causing slippage due to internal stress such as expansion when moving.

In addition, since drainage holes are provided in the leg parts on the overhanging side, there is a risk that the ready-mixed concrete contained between the leg parts after pouring will contain more water than necessary, or that excess water from rain etc. will get on the roadway surface. When water accumulates, draining it to the roadside prevents the foundation block from being eroded by water and shortening its lifespan, and also prevents cracks and prevents the excavated part from loosening due to excess moisture. Therefore, maintenance and management will be better.

In addition, as mentioned above, since the overhanging crosspieces are formed on the top surface of each foundation block, simply by arranging the foundation blocks side by side along the elevated roadway, the distance between the protruding crosspieces at hand and the other side can be moved inside. This makes it possible to accurately construct a wide sidewalk of a desired width even in a narrow place along a roadway, regardless of whether it is straight or curved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the installation state of a conventional overhanging walkway block, Fig. 2 is a slope view of the same, Fig. 3 is a slope view showing an embodiment of the overhanging walkway block of the present invention, and Fig. 4 The figure is a slope view of the foundation block that constitutes this embodiment, Figure 5 is a slope view of the ground cover being fixed to the top plate, and Figure 6 is a cross-sectional view showing the mound-up type installation. , Fig. 7 is a cross-sectional view showing a flat type installation state in another usage example, Fig. 8 is a cross-sectional view of a state in which adjacent top plate parts are butted with mortar, and Fig. 9 is a cross-sectional view showing a state in which the flat type is laid in another usage example. Slope view showing another example of the overhanging walkway block, 1st
Figure 0 is also a plan view. 4... Foundation block, 5, 6... Leg portion, 7... Connecting member, 7a... Insertion hole, 8... Main reinforcement, 9... Top plate part.

Claims (1)

[Scope of utility model registration request] An overhanging walkway block made of concrete with an overhanging crosspiece extending outside the upper part of the foundation block and a top plate formed on the upper surface, and opposed leg parts; opposing connections connecting the leg parts. member; a foundation block formed from a space surrounded by the leg part and the connecting member and having substantially the entire area open to the excavation part so that ready-mixed concrete can be poured continuously; An overhang consisting of an insertion hole provided at a position opposite to the connecting member so that the main reinforcement can be inserted freely, and a drain hole provided in the leg portion on the overhang side so as to communicate with the space and face the road shoulder. Sidewalk block.