JPH0721617Y2 - Concrete block for foundation work - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a concrete block for foundation work used in revetment work, more specifically, it has excellent durability against external pressure, etc. The present invention relates to a concrete block for foundation work that has effects such as difficulty in sinking.

Here, the foundation work means a support body that supports concrete upholstery for protecting the slope of a bank such as a river at the bottom of the slope.

(Prior Art) Conventionally, a foundation work used for revetment work was constructed by assembling a wooden formwork at a construction site and pouring cement into the formwork.

However, in this case, since it is necessary to construct wooden formwork one by one at the site, the construction period becomes long and the labor cost is high accordingly, and because wooden formwork is used, rainwater etc. Therefore, when submerged by water, the form frame floats up, and there is a drawback in that misalignment is likely to occur.

In view of the above drawbacks, it has been proposed to use a concrete block having a substantially U-shaped cross section having an injection port for injecting cement, without using a wooden form.

(Problems to be Solved by the Invention) However, the conventional one using the above concrete block has the following drawbacks although the drawbacks caused when a wooden form is used can be solved.

That is, when pouring cement from the pouring port, the positions of a plurality of adjacent concrete blocks are displaced or the side walls are easily broken due to external pressure, and the load from above due to water pressure or concrete tension and the concrete block itself. The concrete block had the drawback that it could easily sink below the ground due to its own weight.

The present invention was devised there, and its purpose is to have excellent durability against external pressure and to ensure that the positions of adjacent concrete blocks for foundation work do not shift when cement is injected. It is to provide a concrete block that can be constructed and that does not easily sink below the ground.

(Means for Solving the Problems) Means adopted by the present invention for achieving the above object will be described below with reference numerals used in the drawings corresponding to the embodiments.

That is, the structure of the concrete block for foundation work according to claim 1 is that "a pair of side walls and an upper wall are integrally formed in a substantially U shape, and the tips of the side walls are brought into contact with the ground. In a concrete block for foundation work used for revetment construction, an injection port (10) is provided on the upper wall for injecting cement, and the injection port (10) is provided on both end faces in the longitudinal direction of the upper wall. ) And a tightening hole (20) through which the tightening tool (21) is inserted, and a support hole (30) through which a support rod (31) provided near the center of the pair of side walls is inserted, Stoppers (41) provided at both ends of the pair of side walls in the longitudinal direction.
The concrete for a foundation work (100) characterized by having a connecting hole (40) through which the

Next, the structure of the concrete block for foundation work according to claim 2 is that "a pair of side walls and an upper wall are integrally formed in a substantially U shape, and the tips of the side walls are in contact with the ground. In the concrete block for foundation work to be used for revetment construction, an injection port (10) for injecting cement provided on the upper wall surface, and an injection port (10) provided on both end faces in the longitudinal direction of the upper wall. A tightening hole (20) which penetrates through (10) and through which a tightening tool (21) is inserted; and a support hole (30) through which a supporting rod (31) provided near the center of the pair of side walls is inserted. Stoppers (41) provided at both ends of the pair of side walls in the longitudinal direction.
And a connecting hole (40) through which the side walls are inserted, and the tip ends of the pair of side walls have a protrusion (50) protruding outside of the side walls. The content.

(Advantage of the Invention) With regard to the concrete block for foundation work according to claim 1 by the above means, as shown in FIG. 2 and FIG. A plurality of comrades are installed adjacent to each other, and the concrete block (100) is clamped with a fastener (21) that is inserted into a tightening hole (20) in the upper wall of the concrete block (100) so that there is no gap. Link.

Then, the support rod (31) is inserted through the support holes (30) of the pair of side walls to support the side walls, thereby improving the durability of the side walls against external pressure.

Also, attach the stoppers (4) to the connecting holes (40)
(1) is inserted and the concrete blocks (100) are connected to each other and locked to prevent displacement of the concrete blocks (100) when cement is injected from the injection port (10).

Furthermore, as shown in FIG. 7, if a pile is placed on the ground between the pair of side walls so as to leave the head on the ground, the cement injected from the injection port (10) on the upper wall , The head of this pile is solidified together and the concrete block (10
It suppresses subsidence due to its own weight, water pressure and load from above.

(Embodiment) An embodiment of the present invention according to claims 1 and 2 will be described in detail with reference to the drawings. However, this is a representative one, and the present invention is limited by this embodiment. Not a thing.

That is, as shown in FIGS. 1 to 4, the concrete block for foundation work (100) has a longitudinal length of 1000 mm and a height of 1 mm.
000mm, width 1060mm, wall thickness 100mm, side wall protrusion (5
It is composed of a concrete block (100) with a length of 0) of 30 mm.

And the inlet (10) on the top wall is 700 mm long in the longitudinal direction,
It is formed with a width of 350 mm, and cement is injected from this injection port (10).

Next, the tightening holes (20) on both end faces in the longitudinal direction are formed to have a diameter of 15 mm, and the tightening tool (21) is inserted through the tightening holes (20) to tighten the concrete block (100). A bolt and a nut that engages with the bolt are adopted for the.

Next, a supporting hole (30) provided near the center of the pair of side walls is formed with a diameter of 20 mm, and a turnbuckle is provided on the supporting rod (31) which is inserted through the supporting hole (30) to support the side wall. Has been adopted.

Next, the connecting holes (40) provided at both ends of the side wall in the longitudinal direction are
The stopper (41), which is formed to have a diameter of 10 mm, is inserted into the connecting hole (40) and is locked in a state where the concrete blocks (100) are connected to each other, includes a bolt and a nut engaging with the bolt. , A flat plate (42) is used.

In the above example, the concrete block for foundation work (100) has a longitudinal direction of 100.
The size is 0 mm, height 1000 mm, width 1060 mm, but other sizes are also possible, for example, if the construction site is vast, if a length of 2000 mm is adopted, This is convenient because the time required to install the concrete block (100) can be shortened.

Next, the length of the protrusion (50) at the tip of the side wall is set to 30 mm, but it may be other than this, so that the subsidence of the concrete block (100) can be effectively suppressed. It may be arbitrarily selected according to the state of.

Next, the inlet (10) on the top wall has a length of 700 mm and a width of 3
The size is 50mm, but other sizes may be used.
It may be selected according to the size of the concrete block (100).

Next, the diameter of the tightening hole (20) is set to 15 mm, but it may be other than this and may be selected according to the size of the tightening tool (21) to be inserted therethrough. Further, the shape of the tightening hole (20) may be any shape other than circular as long as the tightening tool (21) can be inserted therethrough.

Next, a bolt and a nut that engages with the bolt are used as the fastening tool (21), but if the concrete block (100) can be fastened by being inserted into the fastening hole (20), It may be other than that.

Next, the diameter of the support hole (30) near the center of the side wall is 20 mm.
However, other than this, it may be selected according to the size of the support rod (31) to be inserted there. Further, the support hole (30) may have any shape other than a circle as long as the support rod (31) can be inserted therethrough.

Next, a turnbuckle is adopted as the support rod, but any other one can be used as long as it can support the pair of side walls.

Next, the diameter of the connecting holes (40) provided at both ends in the longitudinal direction of the side wall is set to 10 mm, but it may be other than this, depending on the size of the stopper (41) to be inserted there. You may choose. Further, the shape of the connecting hole (40) may be any shape other than circular as long as the stopper (41) can be inserted therethrough.

Next, a bolt and a nut that engages with this, and a flat plate (42) are used for the stopper (41), but they are inserted into the connecting hole (40) to connect the concrete blocks (100) to each other. Other than this, as long as it can be locked,
For example, a rivet may be used instead of the bolt, and the rivet may be caulked to connect the concrete blocks (100) to each other.

Further, as shown in FIGS. 5 and 6, the side wall is provided with notches (43) on both end faces in the longitudinal direction, and when the concrete blocks (100) are connected to each other, the connection holes (40 ) May be formed, the stopper (42) may be inserted into the connecting hole (40). In this case, since only one connecting hole (40) is required, only one stopper (42) can be inserted, which is advantageous in terms of cost.

The concrete block for foundation work (100) according to this example obtained in this way was adopted for revetment work on a river as shown in FIG. 7, and compared with a conventional one using a wooden formwork. The construction period was less than half, and not only was the construction done quickly, but the construction cost was also reduced. Further, there was almost no subsidence of the concrete block below the ground.

(Effects of the Invention) As described above, the present invention according to claim 1 or 2 has the following effects.

First, the concrete block for foundation work according to claim 1 has tightening holes on both end surfaces of the upper wall in the longitudinal direction, and the adjacent concrete block blocks should be tightened by fasteners inserted into the tightening holes. Since there is no gap, therefore, even when cement is injected from the injection port, this cement does not leak and reliable construction is possible.

A pair of side walls has a support hole near the center, and the side walls are supported by a support rod that is inserted into the support holes.The durability against concrete load, water pressure and other external pressure is improved, so the service life should be extended. You can

Since the concrete blocks have connecting holes at both end portions in the longitudinal direction of the side wall and the concrete blocks are connected and locked by the stoppers inserted through the connecting holes, the positional displacement of the concrete blocks does not occur. Not only is it easy to perform, but reliable construction is possible.

Cement is injected through the inlet to solidify together with the piles placed from above the ground to prevent the concrete block from sinking below the ground.

Since it is not necessary to assemble a wooden formwork at the construction site, construction can be done quickly, and the construction period is short and construction costs are low.

Next, since the concrete block for foundation work according to claim 2 has a projecting portion at the tip of the side wall outside the side wall, in addition to the effect of the concrete block for foundation work according to claim 1, the grounding area is increased by the projecting portion. Therefore, the concrete block is prevented from sinking below the ground due to its own weight, water pressure, and other loads from above.

[Brief description of drawings]

FIG. 1 is a perspective view of a concrete block for foundation work according to an embodiment of the present invention, FIG. 2 is a partially omitted perspective view showing a state where a plurality of concrete blocks for foundation work are used adjacent to each other, and FIG. The same plan view, FIG. 4 is the same side view, FIG. 5 is a partially omitted perspective view of a concrete block for foundation work according to another embodiment, and FIG. 6 is a state in which the concrete blocks for foundation work are adjacent to each other. FIG. 7 is a partially omitted front view, and FIG. 7 is a cross-sectional view showing a state where a concrete block for foundation work according to an embodiment of the present invention is used in a river. Explanation of reference numerals 10 ... injection port, 20 ... tightening hole, 30 ... supporting hole, 40 ... connecting hole, 50
… Projection part, 100… Concrete block for foundation work according to the embodiment of the present invention.

Claims (2)

[Scope of utility model registration request] 1. A concrete block for foundation work, comprising a pair of side walls and an upper wall integrally formed in a substantially U shape, the tip of the side walls being in contact with the ground for use in revetment work. An injection port for injecting cement, which is provided on the upper wall surface, and a tightening hole which is provided on both end surfaces in the longitudinal direction of the upper wall and which penetrates the injection port and into which a fastener is inserted, A pair of side walls provided with a support hole through which a support rod is inserted, and a pair of side walls with connection holes through which stoppers are inserted, which are provided at both ends in the longitudinal direction. Concrete block for foundation work. 2. The concrete block for foundation work according to claim 1, wherein the tip ends of the pair of side walls have a projecting portion projecting to the outside of the side walls.