JPH0361809B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a formwork used when pouring concrete onto a slope, and more specifically, the present invention relates to a formwork used when pouring concrete onto a slope. A method characterized in that a formwork space is formed on a slope by providing continuous frames and supporting the entire continuous unit formwork by means of batten material built on top of the unit formwork. Regarding surface formwork.

(Technical background) When pouring concrete on slopes such as coastal breakwaters, retaining walls for roads, or downstream backs of dams, multiple anchor bolts are planted across the entire slope, and tie bars, etc. are attached to these anchor bolts. A construction method has been used in which a sheet material is attached through the slope, and concrete is poured into the formwork space formed by the sheet material and the slope.

However, in order to construct these formwork spaces, it is necessary to install multiple anchor bolts across the entire slope, and as a result of the sheet material being subjected to excessive lateral pressure during concrete pouring, the anchor bolts themselves Accidents such as loosening or falling off the slope may occur, which delays the construction period and increases construction costs.

Therefore, in the "Flexible Formwork Construction Method" (Japanese Patent Application No. 58-193935), which the inventors had previously filed, rope anchors were planted at predetermined intervals on the slope, and tightening metal fittings were installed between the rope anchors. We proposed a flexible formwork construction method that applies the so-called suspension bridge theory, in which the lateral pressure of poured concrete applied to the flexible sheet is dispersed by the wire rope inserted through the wire rope.

Compared to conventional formwork, this flexible formwork method can form a concrete layer with a predetermined slope on a slope more uniformly and accurately. The concrete surface becomes wavy. Furthermore, there were many unresolved parts such as wire ropes and fastening metal fittings, which resulted in enormous construction costs and many other issues that remained to be resolved.

(Purpose) After careful consideration, the inventors decided to create a formwork that would prevent the surface of poured concrete from becoming wavy and that would be reused many times due to the small amount of filler material. The frames are arranged in a row, and the formwork supports each unit formwork by means of batting material installed on the top of the unit formwork, which can sufficiently resist the lateral pressure of the poured concrete and maintain a smooth surface of the poured concrete. In addition to ensuring safety, it is possible to construct a slope where filler members are rare.

(Summary of the Invention and Examples) Hereinafter, the slope formwork of the present invention will be explained in detail based on the drawings.

FIG. 1 is a schematic side view showing a state in which sacrificial concrete 103 is placed between a slope 101 and a slope 102 on a slope 100 of a sandy ground, and a formwork space according to the present invention is formed on the upper surface thereof. be.

That is, from the head of the temple 101 to the end of the temple 102,
Root cutting is performed using an excavator such as a excavator, and sacrificial concrete 103, 103 is poured directly into the root cutting.

Waste concrete 103, 103, slope 100
The end portions are formed into a band shape along the inclination direction, and are formed to form a so-called frame body on the side surface. On such a slope 100, support anchor bolts 10 are placed on waste concrete 103, 103 placed at both ends.
4,104... are implanted at predetermined intervals in the inclined direction.

Then, the unit formworks 1, 1... are laid in a continuous manner between the waste concrete 103, 103, and the unit formworks 1, 1... , and then the butter material 5, 5...
Anchor bolts 104,
104.

Therefore, on the slope 100, there is 10 pieces of waste concrete.
A formwork space O is formed by the unit forms 3, 103, . . . and the unit formworks 1, 1, .

FIG. 2 is a plan view of the unit formwork 1.

This unit formwork 1 is formed by forming elongated members 11, 11, 11, 11 made of so-called angle steel materials into a substantially rectangular shape, and has a middle crosspiece 12 installed in the horizontal center.

In the unit formwork 1 having the above-described shape, an expanded metal 2 as a porous surface material is stretched over the weir plate surface 13, and a fiber material 3 is adhered to the outer surface of the expanded metal 2.

That is, as shown in FIG. 3, which is a cross-sectional view taken along the line A-A in FIG. The fiber material 3 is entirely covered on the outer surface side of the expanded metal 2.

Incidentally, the elongated materials 11, 11, which are formed into a substantially rectangular shape
11, 11 and the expanded metal 2 are fixed together by spot welding or the like. Furthermore, the fibrous material 3 is directly screwed to the elongated materials 11, 11, .

As the porous surface material, in addition to the expanded metal described above, a perforated foam made of steel or resin, a so-called porous foam, etc. can be used.

FIG. 4 shows unit formworks 1, 1... having the above configuration.
... is a partially omitted plan view showing a state in which they are laid in series on a slope 100.

In other words, a plurality of unit formworks 1, 1... are laid in a row on waste concrete 103, 103, and the unit formworks 1, 1... placed at the outermost part of the slope 100 are made of waste concrete. 103,103
Anchor bolts 104, 104...
Other unit formworks 1, 1... long materials 11, 1 are placed through the unit formworks 1, 1... and are connected to these unit formworks 1, 1...
1... They are fixed to each other with bolts or clamps (not shown).

On the other hand, a batten material 5 is constructed from the upper part of the unit formworks 1, 1..., which have been laid, and anchor bolts 10 are installed.
4, 104, the elongated materials 11, 11, . . . of the unit formworks 1, 1, .

Also, the unit formworks 1, 1, . . . are supported by the supporting metal fittings 4, 4, . . . That is, as shown in the partially omitted diagram of FIG. 5, the expanded metal 2 and the fiber material 3 are integrally connected by a washer 41 fixed to the lower end of the shaft of the supporting metal 4 and a cone 42 screwed to the lower end thread. to pinch. Further, at the upper part, a nut N is screwed through a washer 6 to support two continuous single pipes 51 and 51 as a butterfly member 5.

Therefore, the unit formworks 1, 1, .

If the supporting metal fittings 4, 4... are provided at appropriate locations of the unit formworks 1, 1..., the unit formworks 1, 1... will be connected to each other, and the unit formworks 1, 1... will be Parallel weir plate surfaces 13, 13... are formed.

FIG. 6 is a partially omitted view of the case where a steel beam 52 is used as the butterfly material 5. FIG.

Like the single pipe 51 described above, the steel beam 52 has a high cross-sectional efficiency and is free from buckling and twisting, so even if the span between the waste concrete 103, 103 is large, it can be used to form a plurality of unit formworks 1, 1... can be supported.

FIG. 7 is a view taken along the line BB in FIG. 4.

That is, the above-mentioned waste concrete 103, 10
A plurality of unit formworks 1, 1... laid between 3,
The slope surface 100 is supported by the supporting metal fittings 4, 4... which support the batten materials 5, 5... constructed on the upper part of the batten materials 5, 5... and the unit formworks 1, 1... to the batta materials 5, 5...
A predetermined formwork space O is formed above.

This formwork space O is the above-mentioned head 101 and end 1.
02, and the poured concrete is normally poured from the head 101.

In addition, as shown in the plan view of Fig. 8, if the waste concrete 103, 103... is arranged in a lattice shape and the concrete is poured within this lattice, the method shown in Fig. 9 (Fig.
As shown in the cross-sectional view taken along the line C--C in the figure, a concrete inlet 14 is opened approximately in the center of the unit formwork 1, and concrete is appropriately placed through the inlet 14. Furthermore, the size of the lattice and the size of the unit formwork 1 are formed to be approximately equal, so that the waste concrete 10
3,103...Siebold 10 planted above
5, 105, . . ., the formwork 1 can be installed in alignment with the grid.

In addition, in order to move the unit formwork 1, as shown in the schematic diagram of FIG. It is also possible to facilitate refilling and movement.

(Effects) When concrete is poured into the slope formwork having the above configuration, the unit formwork does not bulge against the lateral pressure of the poured concrete, and is smooth over the entire slope and has a predetermined thickness. A concrete layer is created.

Moreover, everything other than the supporting metal fittings can be reused.
Component costs are also significantly reduced.

Furthermore, since the weir plate surface of the unit formwork has a porous surface material and a fiber material is attached to its outer surface, air bubbles and hardening surplus water contained in the poured concrete are absorbed by capillary action caused by the fiber material. It can be transmitted to the outside from the entire surface of the weir plate.

Therefore, air avatars are not generated on the surface of the poured concrete, and the initial strength and abrasion resistance are increased.

This enables early demolding of the formwork and increases the number of times the unit formwork can be reused.

Furthermore, the fiber material itself has the effect of retaining heat in the winter and as a heat insulating material in the summer, so it has a significant curing effect, preventing cracks caused by temperature differences when constructing dams and other mountainous areas. .

[Brief explanation of drawings]

Figure 1 is a schematic side view explaining the concrete formwork for the slope, Figure 2 is a plan view of the unit formwork, and Figure 3
The figure is a sectional view taken along the line A-A in Fig. 2.
The figure is a partially omitted plan view showing a state in which the unit formwork is laid on a slope, FIG. FIG. 6 is a partially omitted view illustrating a state in which a unit panel is supported by supporting metal fittings using a steel beam, and FIG. 7 is a view taken along the line B--B in FIG. 4. Fig. 8 is a plan view showing the grid-like waste concrete, Fig. 9 is a sectional view taken along line C-C in Fig. 8, and Fig. 10 is a view of the rollers provided at the end of the unit formwork. It is a schematic diagram. 1... Unit formwork, 11, 11... Long material, 10
3... Waste concrete, 2... Expanded metal, 3... Textile material, 4, 4... Supporting metal fittings, 5, 5
...Bata wood, 51,51...Single pipe, 52,52...
...Steel beam, O...Formwork space, R...Roller.

Claims (1)

[Scope of Claims] 1. Batter material is constructed between a pair of sacrificial concrete provided in a band shape along the slope direction of the slope, and a plurality of unit formworks are laid on the lower surface side of the bata material. The slope formwork forms a formwork space between concrete and a plurality of unit formworks, and the butterfly materials are fixed at both ends to support anchor bolts implanted at predetermined intervals on the waste concrete. The unit formwork is made of angle steel material formed into a substantially rectangular shape, with a porous facing material stretched over the weir plate surface, and a fibrous material coated on the entire surface of the porous facing material on the side that contacts the concrete. Then, the outermost unit formwork among the plurality of unit formworks is sandwiched between the upper surface of the waste concrete and the butter material via the support anchor bolts, and each unit formwork is mutually A slope formwork characterized in that the perforated face material and the fiber material of each unit formwork are integrally sandwiched together via a supporting metal fitting provided on the butter material.