JPS6315402B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete projecting walkway block to be laid, for example, at the edge of an elevated walkway, and a method for laying the same.

Previously, in order to create a sidewalk at the edge of an irrigation canal or a road that ran through rice fields, it was necessary to fill in the irrigation canal or rice field. However, since sidewalks with this type of 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. That is, a substantially frame-shaped concrete foundation block A, a concrete overhanging beam B placed and fixed on the upper surface of the foundation block A, and a concrete overhanging beam B placed on the top surface of the foundation block A.
It is formed from anchor bolts C and D planted on the top surface of the foundation block A to be placed and fixed on the top surface.

To construct the sidewalk E, 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, concrete foundation blocks A are successively placed in parallel along the roadway F on the ready-mixed concrete as a base poured in this excavated part G,
Thereafter, fresh concrete H is poured into the foundation block A and solidified, and several anchor bolts C and D are then planted.

Next, the overhanging beam B is placed on the top surface of the foundation block A, and then, after being positioned on the foundation block A within several bolt insertion holes I and J previously provided in the base a of the overhanging beam B. the anchor bolt C,
D is inserted, and mortar h is poured into the bolt insertion holes I and J and solidified. 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, the surface plate part b on one side of the overhanging crosspiece B
Then, asphalt K and L are paved over the soil that has been backfilled into the excavated area G to create a sidewalk E.

However, in the conventional product shown in Fig. 1, the anchor bolts C and D are placed in the foundation block A on site by pouring the ready-mixed concrete H into the foundation block A. H
It takes a lot of time to cast the anchors, and it also takes time to measure the installation positions of the anchor bolts C and D, which results in the installation positions of the anchor bolts C and D being uneven for each foundation block A. was. Further, it was also time-consuming to attach the projecting beams B to the upper surfaces of the foundation blocks A that were arranged side by side along the roadway F. Therefore, this conventional product
The disadvantage was that it took a long time to construct Sidewalk E.

Furthermore, in order to fix the overhanging crosspiece B to the top surface of the foundation block A, the attachment positions of the anchor bolts C and D planted in the foundation block A vary from one foundation block A to another, so the overhanging crosspiece B If the mutual gap is placed at hand and several hundred meters away, the inner side (roadside side) and the outside (sidewalk side) will be uneven, making it impossible to create a sidewalk accurately along the roadway. Ta.

Furthermore, after the sidewalk was constructed, the foundation block A was likely to slip against the excavated portion G due to external forces such as earth pressure, vibrations caused by passing cars, and earthquakes. In addition, the foundation block A itself is structurally weak, and in particular the connection strength at the points where the foundation blocks A are connected to each other is structurally weak against external forces and internal stresses such as expansion of fresh concrete poured into the foundation block A. It had some inconveniences such as being cut or damaged.

The specified invention and the second invention have been made in view of the above-mentioned points, and the purpose thereof is to make it possible to create a sidewalk in a narrow space in a short construction period, and to improve the gap between the overhanging beams. The blocks can be laid with uniform gaps between the inner and outer sides of the one at hand and the one placed ahead, and can be securely fixed without slipping in the excavated area. Its own rigidity increases against external forces such as pressure and tension from both the longitudinal direction and the direction perpendicular to the longitudinal direction, as well as internal stress, making it structurally robust, and especially at the connection points between the foundation blocks. To provide an overhanging walkway block which has high strength and can be easily constructed on site, and a method for laying the same.

The first embodiment of the specified invention of the present application will be described below along with the laying method of the second invention with reference to FIGS. 2 to 4.

Reference numeral 1 designates an elevated roadway, for example, where an irrigation canal flows along the edge or runs through a rice field, and reference numeral 2 designates a sidewalk to be built 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,
5, two crosspieces 6, 6 as connecting members that connect the lower inner sides of the joint ends of the leg parts 5, 5, and the upper inner sides of the joint ends of the leg parts 5, 5 that extend outward. Two overhanging beams 7 that also serve as connecting members that can be extended out,
By connecting the beams 7, the frame structure is formed as a whole, and the beams 6, 6 and the projecting beams 7, 7 are resistant to external forces such as pressure and tension on the opposing leg portions 5, 5, and internal stress. This makes it more durable.

Reference numeral 4a denotes a connection space portion opened at the joint end in the longitudinal direction of the foundation block 4, and this connection space portion 4a is connected to the crosspieces 6, 6 as a connecting member between the leg portions 5, 5. By being located on the outside of the overhanging beams 7, 7, it is formed into a substantially U-shape in plan, and reinforcing bars 15', which will be described later, are placed inside, and the ready-mixed concrete 14 is placed and hardened. When connecting the foundation blocks 4 in succession, the installation area of the fresh concrete 14 relative to the excavation part 3 is increased to firmly fix the foundation blocks 4 to the excavation part 3, and the concrete is poured into the connection spaces 4a, 4a. The ready-mixed concrete 14 that has been set and solidified is attached to the leg parts 5,
As a result of being integrated with the plurality of crosspieces 6 and the plurality of overhanging crosspieces 7 connected above and below the foundation block 4.
In cooperation with a plurality of reinforcing bars 15' arranged in the leg parts 5, 5 of especially in basic block 4.
The mutually connected parts are structurally robust. 4b are leg parts 5, 5 whose end cross sections face each other.
and is surrounded by a plurality of crosspieces 6 and a plurality of overhanging crosspieces 7 from above and below, from left and right, and in the longitudinal direction, a connection space is provided via the crosspieces 6 and overhanging crosspieces 7. 4
a, 4a, and is a space formed approximately in the middle, and this space 4b and connection space 4a, 4a.
A plurality of reinforcing bars 15' are placed inside each of the holes, and fresh concrete 14 is placed and hardened.

Reference numeral 5a denotes an inclined wall surface formed on the opposing surface of the leg parts 5, 5 so that the width becomes narrower from above to below. The fresh concrete 14 is poured densely without forming many pores when poured and hardened in the space 4b between the spaces 4b and the connecting spaces 4a, 4a.
is cured and solidified, and the thickness of the leg parts 5, 5 is made thicker in the width direction at the lower part than at the upper part to increase the stability against ground contact.

Reference numeral 8 denotes a top plate part, and this top plate part 8 is constructed above the foundation block 4 and is attached to the leg parts 5, 5 on the upper surface of the two projecting beams 7, 7 extending outward. It is formed at right angles to the 9 is the ground cover, this ground cover 9
is adhered and solidified to the outer edge and upper surface of the top plate portion 8 using mortar, anchor bolts, and the like. Although this ground covering 9 is usually made of concrete, the inside thereof may be hollowed out as necessary to make it lightweight, although it is not shown in the drawings. 9A is a mounting hole provided in the ground covering 9, into which the lower end of the support column 11 is inserted and filled with concrete;
By solidifying, the guide fence 10 is erected. 1
2 is a guide rail, 13 is its support, 14 is ready-mixed concrete, and 15' is a reinforcing bar.

The first embodiment of the specific invention of the present application has the above-mentioned configuration, and the operation and construction method of the second invention will be explained below. In order to create the sidewalk 2, first, as a first step, an excavated portion 3 having a substantially L-shaped cross section is formed at the edge of the roadway 1.

Next, in the second step, the foundation block 4 is installed in the excavation section 3.
After placing a large number of blocks in parallel along the roadway 1, facing leg parts 5, 5 of the foundation block 4 are placed.
and a space 4b surrounded by the crosspiece 6 and the overhanging crosspiece 7 from the top, bottom, right and left, and a connection formed at the joint end of the leg parts 5, 5 via a connecting member to the space 4b. A plurality of reinforcing bars 15' are arranged in the openings 4a, 4a, and then the ready-mixed concrete 14 is placed in a substantially U-shaped planar opening at the joint end between the opposing leg parts 5, 5 of the foundation block 4. Connection spaces 4a, 4
By fixing the foundation block 4 to the excavation part 3 by pouring and solidifying it in the space 4b that is continuous with the connection spaces 4a and 4a, the foundation block 4 can be placed on the edge of the roadway 1. The overhanging beam 7 formed on the upper surface is cantilevered and supported. At this time, the fresh concrete 14 falls into the connecting spaces 4a, 4a and the space 4b while being guided by the inclined wall surfaces 5a, 5a that slope downward from above the opposing surfaces of the opposing leg parts 5, 5. The leg parts 5, 5 are packed tightly together, and have a large weight and a low center of gravity relative to the extended part of the overhanging beam 7, and the thickness of the lower part of the leg parts 5, 5 in the width direction is formed to be thicker than the thickness of the upper part. Since the center of gravity is lowered, the foundation block 4 is stable without tipping.

Furthermore, connection spaces 4a, 4a are formed at the joint ends of the foundation block 4, and a space 4b is formed in the middle via a plurality of crosspieces 6, 6 and overhanging crosspieces 7, 7 as connecting members. Since the ground contact area of the foundation block 4 with respect to the excavation part 3 increases, the poured fresh concrete 14 flows into the excavation part 3 and hardens, and the foundation block 4 is opened in the excavation part 3. is firmly fixed.

In this way, a plurality of crosspieces 6 serving as connecting members are connected below between the opposing leg portions 5, 5, and a plurality of overhanging crosspieces 7 which also serve as connecting members are connected above to form a rigid frame structure. Therefore, when external forces such as earth pressure, vibrations of automobiles, earthquakes, etc. or internal stresses such as expansion of fresh concrete 14 act in a direction perpendicular to the longitudinal direction of the foundation block 4, it exerts rigid force such as pressing and tension. do. In addition, in the longitudinal direction of the foundation block 4, there are opposing leg parts 5, 5, and a plurality of crosspieces 6.
A space portion 4b surrounded by a plurality of projecting beams 7
Since a plurality of reinforcing bars 15' are arranged in the continuous connection spaces 4a, 4a, and the ready-mixed concrete 14 is poured and hardened, external force and internal stress act in the longitudinal direction of the foundation block 4. Even if the reinforcing bars 15'
It exhibits rigidity against pressure, tension, twisting, etc. Moreover, the connection space 4 has a substantially U-shaped planar shape.
a, 4a are collided and fresh concrete 14 is placed inside.
Since the foundation blocks 4 are cast together, the connection points between the connected foundation blocks 4 are structurally robust against external force and internal stress.

Thereafter, in a third step, the ground cover 9 is fixed along the outer edge and upper surface of the top plate part 8 using mortar, anchor bolts, etc.

After that, as a fourth step, a sidewalk 2 is created by laying asphalt 15 on the top surface of the top plate part 8, and a roadway 1 is paved with asphalt 16 on the top surface of the soil filled in the void of the excavation part 3. Create.

Furthermore, as a fifth step, the lower ends of the columns 11 of the guide fence 10 are inserted into the mounting holes 9A of the ground cover 9, and concrete is filled and solidified to form the columns 11.
are erected to form the guide fence 10. Also road 1
A sidewalk 2 to be created by similarly erecting supports 13 on the sides to form guide rails 12.
Adjust the width of the In this way, even in a narrow space, the asphalt 15 can be cantilevered and supported on the edge of the roadway 1 by simply laying the asphalt 15 on the top plate part 8 formed on the top surface of the two projecting beams 7, 7 extending outward. It is possible to create a wide sidewalk 2 in a state where the pavement is closed.

5 and 6 show a second embodiment of the specified invention of the present application. In this embodiment, steps 7A, A are formed on the upper surfaces of the two overhanging beams 7, 7 placed above the foundation block 4 on the roadway 1 side, thereby making the roadway 1 a lower step than the sidewalk 2. It differs from the first embodiment in that it is created with a .

Furthermore, what is shown in FIGS. 7 and 8 is a third embodiment of the specified invention of the present application. This embodiment differs from the first and second embodiments in which the opposing leg parts 5, 5 are connected by several crosspieces 6, 6.
By connecting the two leg parts 5, 5 with connecting members 20, 20 in which several through holes 20a which coincide in the longitudinal direction are provided regularly in the vertical and horizontal directions, the foundation block 4 is installed in the excavated part 3 with ready-mixed concrete. 14, the installation position of the main reinforcement 21 can be accurately positioned by simply inserting the main reinforcement 21 into the through holes 20a, 20a provided in the connecting members 20, 20, without the need for pitch splitting. In addition, structurally robust reinforcement can be arranged without connecting the main reinforcements 21 with each other with distribution reinforcements. Thereafter, ready-mixed concrete 14 is continuously poured into the connection spaces 4a, 4a and space 4b between the opposing leg parts 5, 5 of the foundation blocks 4 installed in parallel, and the foundation blocks 4 are placed in the excavated part 3. This embodiment differs from the previous embodiments in that it is fixed.

In each of the embodiments described above, two projecting beams 7, 7 are formed on the lower surface of the top plate portion 8, but the present invention is not limited to this, and several pieces may be provided.

As described above, the present application, the first and second inventions include opposing leg portions, a connecting member that connects the leg portions,
an overhanging crosspiece that also serves as a connecting member that extends outward; a connection space that is approximately U-shaped in plan and opened at the joint end of the leg portion on the outside of the connecting member;
The block is formed from a space provided between the leg parts in the middle of the connection space via the connection member, and a sidewalk surface plate part formed on the upper surface of the overhanging crosspiece. The device itself is lightweight and easy to transport, and the structure is robust because it has a rigid frame structure with the opposing leg portions and the connecting member connected between the leg portions. A space surrounded by the opposing leg parts and a connecting member that connects the leg parts, and a connection space that is approximately U-shaped in plan and formed at the connecting end of the leg part via the connecting member. By arranging reinforcing bars inside the section and simultaneously placing and hardening fresh concrete, rigidity can be exerted by the leg sections and the connecting members connected between the leg sections. In addition, reinforcing bars are arranged in the space and connection space, and the grounding space of the foundation block with respect to the excavation part can be increased, so that earth pressure from the longitudinal direction of the foundation block and the direction orthogonal to the longitudinal direction, vibrations of automobiles, etc. The foundation blocks can be firmly fixed to the excavated area without slipping against external forces such as earthquakes and internal stresses such as the expansion of fresh concrete, and in particular, the connecting parts of the foundation blocks can be connected structurally solidly without breaking, and the construction By utilizing the space, a sidewalk can be created without the foundation blocks leaning on the edge of the roadway.

In this way, unlike conventional methods, the time and effort required to lay the formwork, the time and effort required to pour fresh concrete into the foundation block, harden it, and place the anchor bolts, the positioning work required for this, and the tensioning of the foundation block. Since the work of installing the projecting materials is omitted, the construction period is shortened and the construction cost is reduced.

In addition, as mentioned above, since the overhanging crosspiece is formed on the top surface of the foundation block, simply by arranging the foundation blocks side by side along the elevated roadway, the gap between the overhanging crosspieces at the front and the front can be adjusted to the inside and outside. Then, it becomes uniform and a sidewalk of desired width can be created along the roadway.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the installation state of a conventional overhanging sidewalk block, Fig. 2 is an exploded slope view showing the first embodiment of the specified invention, and Fig. 3 is an excavation installed on one side of the roadway. FIG. 4 is a cross-sectional view showing the installation state, FIG. 5 is an exploded slope view showing the second embodiment of the specified invention, and FIG. 6 is the same installation. A cross-sectional view showing the condition,
FIG. 7 is a perspective view showing a third embodiment of the specified invention, and FIG. 8 is a sectional view showing an example of the laid state. 1... roadway, 2... sidewalk, 3... excavation section, 4...
...Fundamental block, 4a...Connection space, 4b...
. . . Space portion, 5 . . . Leg member portion, 6 .

Claims (1)

[Scope of Claims] 1. Opposing leg parts, a connecting member that connects the leg parts, an overhanging member that connects the leg parts and extends outward, and the connecting member A substantially U-shaped connection space in a plan view opened at the joint end of the leg portion on the outside of the connecting member, and a connection space provided between the leg portion in the middle of the connection space via the connecting member. A concrete overhanging sidewalk block comprising a space and a sidewalk surface plate formed on the upper surface of the overhanging crosspiece. 2. A foundation block with opposing leg parts connected via a connecting member and an overhanging crosspiece extending outward is installed continuously in parallel in an excavation part provided at the edge of the roadway, and the foundation block is Reinforcing bars are arranged in a space surrounded by the opposing leg parts and the connecting member and in a connection space formed at the joint end of the leg part outside the connecting member, and ready-mixed concrete is placed inside the space. The fresh concrete is poured into the excavation part through the space part and the connection space part by continuous pouring and solidification, and is solidified to fix the foundation block to the excavation part and create a walkway. A method of laying concrete overhanging walkway blocks.