JP2691353B2 - Road widening block - Google Patents

Description

TECHNICAL FIELD The present invention relates to a road widening block suitable for widening a road provided along a mountain or the like.

(Conventional technology and problems)

Conventionally, the following methods have been mainly adopted as a method of expanding the road width or newly adding a sidewalk to a narrow existing road such as a mountain road.

The first method is to newly embank the valley side slope to the road.

However, this method requires a large amount of sediment, and
In order to prevent slippage collapse between the old topsoil and the new topsoil, steps must be provided on the old topsoil, measures to ensure safety such as hitting piles are required, and rainwater etc. from the new topsoil (slope surface) Protective work such as lawn planting is necessary to prevent penetration and erosion collapse on the slope. For this reason, there are problems that the construction becomes large, the construction cost becomes high, and it takes a long time for the embankment portion to harden and stabilize.

The second method is to raise a stone wall or concrete retaining wall from an appropriate position on the valley side slope to the road, fill the space between the stone wall and the old slope with sand, and compact it to widen the road.

However, this method has a drawback that the allowable scale is limited depending on the conditions such as topography and soil quality, and there is a problem that it collapses if unreasonable construction is carried out, which causes danger.

An object of the present invention is to provide a road widening block that solves the problems existing in such conventional methods.

[Means for solving the problem]

The widening block 3 according to the present invention has a fuchin portion 4a at the lower end.
And a leg block 4 to be installed on the stepped ground 2 formed at a position lower than the road R by excavating and cutting the valley side slope S with respect to the road R, and a reinforcing outer edge portion 23 and a support projecting downward on the lower surface. In addition to having the portion 6, the width of the upper surface 5u has a stepped ground 2
Has a surface continuous with the road R on the upper surface 5u and is installed on the leg block 4 so that the reinforcing outer edge portion 23 is provided on the side surface on the road R side above the leg block 4. And a road forming block 5 for connecting the support portion 6 to a side surface of the lower portion of the leg block 4 opposite to the side surface.

In this case, according to a preferred embodiment, the support part 6 is inclined and the lower end is connected to the footin part 4a. The widening block 3 also includes a hard rubber plate interposed between the leg block 4 and the road forming block 5 including the reinforcing outer edge portion 23 and the support portion 6.

[Action]

 Next, the operation of the present invention will be described.

According to the road widening block 3 of the present invention, the width of the road R can be expanded by installing the widening block 3 on the stepped ground 2 formed on the valley side slope S. The widening block 3 is integrated with a leg block 4 directly installed on the stepped ground 2 and a road forming block 5 whose upper surface 5u can be directly used as a road surface. As a result, the stepped ground 2 need only have a width for providing the leg blocks 4, and the road R is widened by the upper surface 5u having a width wider than the effective width of the stepped ground 2.

〔Example〕

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, a widening method using the road widening block 3 according to the present invention will be described with reference to FIGS. 5 to 7.

FIG. 5 shows a cross section of an asphalt-paved road R provided on a mountain slope. 6th to the road R
As shown in the figure, the valley side slope S is excavated to form a steep slope 11, and a substantially level step ground 2 is formed at a required position lower than the road.
Build. That is, road shoulders (slopes), slopes (slopes), etc. are exposed to rainwater and the like and are unstable as the ground, and it is difficult to support heavy objects such as automobiles. Therefore, by excavating the valley-side slope S at an appropriate position in the vertical direction and cutting the soil, it is possible to expose the ground with tightness and to secure a certain horizontal width. This step is constructed on a stable ground and foundation base that can sufficiently resist the weight of the building and the load of the car.
Then, a widening block 3 is provided on the stepped ground 2 constructed as shown in FIG. The widening block 3 can form a surface whose upper surface 5u is continuous with the road R, and the upper surface 5u is formed wider than the effective width of the stepped ground 2. As a result, the block 3 has a road forming portion that projects to the valley side, and expands the substantial width of the road R.

Next, the structure and construction method of the widening block 3 will be described with reference to FIGS. 1 and 2.

First, in FIG. 1, foundation work similar to that of a general concrete building is performed on the stepped ground 2. For example, the foundation 21 is constructed by laying and crushing crushed stones, hammering waste concrete, assembling reinforcing bars and dams, and placing concrete. It should be noted that it does not prevent necessary auxiliary work such as staking work in a place with low bearing capacity.

The widening block 3 is a leg block 4 and a road forming block 5.
Consists of The leg block 4 may be pre-manufactured as a precast concrete block in which a cap nut 22 with an anchor is embedded and a through hole is provided in a wide fuchin portion 4a or the like, and this may be installed on the foundation 21 by a crane or the like. Then
Alternatively, the reinforcing bars and the formwork may be assembled on the foundation 21 and concrete may be poured to make it on site.

On the other hand, the road forming block 5 is manufactured in advance as a precast concrete block having an appropriate length. At that time, as shown in FIG. 1, the support portion 6 inclined from the lower surface of the end portion on the side opposite to the road R side to the leg block 4 side, the reinforcing outer edge portion 23, and the ground cover 24 are integrally formed. To do. Further, a plurality of anchor cap nuts 22 are embedded in predetermined positions of the support portion 6 and the reinforcing outer edge portion 23, and the block 5
Is installed on the leg block 4 with a crane, etc., and the support part 6
The lower end of the leg block 4 and the footing portion 4a of the leg block 4 are coupled via the coupling mechanism 25a, and the reinforcing outer edge portion 23 and the upper side surface of the leg block 4 are coupled via the coupling mechanism 25b. The coupling mechanism 25b is shown in FIG. To configure. First, each cap nut with anchor 22 has a hard rubber plate (seismic isolation rubber plate) 27
28, L-shaped metal fitting 2 for connecting the leg block 4 and the outer edge portion 23
9. Fix the hard rubber packings 30 and 31, the washers 32 and 33 with the fixing bolts 34 and 35. The insertion hole of the L-shaped metal fitting 29 through which the fixing bolts 34 and 35 are inserted is the fixing bolt.
It is made larger than the diameter of 34 and 35, and hard rubber plates 27 and 28
Fit a part of. Such a coupling structure 25b can be similarly applied to the other coupling mechanism 25a, and it can be dealt with by changing the shape of the L-shaped metal fitting 29. Further, the hard rubber plate is interposed between the lower surface of the road forming block 5 and the upper surface of the leg block 4, and also between the support portion 6 and the footin portion 4a to function as the bearings 36 and 37. By using such hard rubber plate, etc., dimensional error (twist and shrinkage after mounting)
Absorb horizontal and vertical loads due to vibrations and vibrations. In addition,
The road forming blocks 5 are connected along the road R,
Hard rubber or the like is interposed between the joints and caulking is performed with asphalt material or the like.

The method of connecting the leg block 4 and the road forming block 5 varies depending on the size of the blocks 4 and 5 such as shape, weight, size, and the situation of the mounting place, and is limited to the above method. Not something to do.

On the other hand, the installed widening block 3 is backfilled with earth and sand T. If necessary, a curb 39 protruding upward is provided at an appropriate position of the road forming block 5 to divide the roadway and the sidewalk W. Further, the asphalt pavement H is applied to the upper surface 5u so as to be continuous with the existing asphalt pavement of the road R. In addition, ancillary work such as installing guardrails, protecting slopes (planting grass, etc.) and installing drainage pipes will be carried out as necessary.

Such road forming blocks 5 are formed to have a predetermined length in the direction along the road, and are sequentially arranged along the road R. A plurality of leg blocks 4 can be combined with one road forming block 5 at a predetermined interval.
Alternatively, the foundation 21 and the leg blocks 4 may be provided by intermittently excavating along the road R. Depending on the site conditions such as topography and soil quality, the foundation 21 and the leg blocks 4 may be integrally formed with the site formwork. , You can also put concrete to build. Reinforcing bars are inserted in each of the blocks 4 and 5 if necessary.

Next, an applied embodiment will be described with reference to FIG.

In the application example shown in FIG. 3, the foundation 21 is further provided with a steep slope 11.
Is provided along with and functions as a retaining wall portion 21a for the steep slope 11 and has a function of supporting the road R side of the road forming block 5a. Further, the support portion 6a is prepared separately from steel, the lower end is coupled to the footing portion 4a of the leg block by the bolt nut mechanism 40, and the lower surface of the road forming block 5a is supported by the upper end bearing extending obliquely upward. . In addition, 41 shows the side for reinforcement, 42 shows a well-known bearing.
This embodiment is suitable when an earth retaining wall is additionally required depending on the soil quality of the road R, the depth of excavation of the slope S, and the like, and when the foundation or the like cannot relatively greatly extend to the left and right.

Still another applied embodiment will be described with reference to FIG. The road forming block 5b shown in FIG. 4 has a modified shape. The road forming block 5b is formed by bending the support portion 6b in the middle so that a part of the road forming block 5b has a horizontal shape and is combined with a reinforcing beam 45 provided in the central portion of the block 5b to integrally form the support portion 6b. It is possible to prevent the buckling of the leg block and support the leg block or the foundation as close to the road R as possible. Therefore, it is possible to form a road that relatively overhangs on the valley side slope.

In this way, the present invention makes the embankment of the riverbed as wide as possible,
This is effective when you want to use it as a road, or when you want to widen the valley side of a narrow mountain road.

As described above, the embodiments have been described in detail, but the present invention is not limited to such embodiments, and the configuration, shape,
The material and the like can be arbitrarily changed without departing from the gist of the present invention.

〔The invention's effect〕

Thus, the road widening block according to the present invention has the following effects.

Construction is easier and construction costs are lower than conventional methods.

Various on-site work on the shoulders and slopes is dangerous, but the use of precast members can shorten the construction period and ensure construction safety.

By reducing the excavated portion of the slope and effectively expanding the road width, it can contribute to the safe passage of people and vehicles.

Since the reinforcing outer edge portion of the lower surface is connected to the side surface on the road side in the upper portion of the leg block, and the support portion is connected to the side surface opposite to the side surface in the lower portion of the leg block, the road forming block is provided. The road forming blocks can be securely, safely and firmly connected to each other, so that reliability and safety can be dramatically improved. Moreover, the road width that can be widened can be further increased as compared with the conventional construction method.

According to a preferred embodiment, if a hard rubber plate is interposed between the road forming block including the reinforcing outer edge portion and the support portion and the leg block, it may become horizontal due to dimensional error (twist and contraction after mounting) or vibration. Also, the vertical load can be absorbed.

[Brief description of the drawings]

1 is a longitudinal sectional view of a widening block according to the present invention, FIG. 2 is an enlarged view of a coupling mechanism in the widening block, and FIG. 3 is a vertical sectional view of a widening block according to an application example of the present invention. Fig .: Front view of a road forming block in a widening block according to another application of the present invention, Figs. 5 to 7: Explanatory diagrams sequentially showing a widening method using the road widening block according to the present invention. In the drawing, 2: stepped ground, 3: widening block, 4: leg block, 4a: footin part 5: road forming block, 6: support part, 5u: upper surface 23: outer edge for reinforcement, S: valley side slope, R: Road

Claims (3)

(57) [Claims] 1. A leg block having a footing portion at a lower end, which is installed on a stepped ground formed by excavating and cutting a valley side slope with respect to a road to a position lower than the road, and a reinforcing outer edge protruding downward on a lower surface. And a support portion, the width of the upper surface is wider than the effective width of the stepped ground, and the upper surface has a surface continuous with the road, and the reinforcing outer edge portion is installed on the leg block. A road forming block that connects the upper side of the leg block to a side surface on the road side and the support portion to a lower side of the leg block on a side surface opposite to the side surface. block. 2. The widening block for a road according to claim 1, wherein the support portion is inclined and the lower end is connected to the footin portion. 3. A road widening block according to claim 1, further comprising a hard rubber plate interposed between the road forming block including the reinforcing outer edge portion and the support portion and the leg block.