JPS5965108A - Principal rafter-shaped steel dam and its construction - Google Patents

Abstract

PURPOSE:To simply construct a checkdam or embankment by a method in which a box having a nearly trapezoidal form is made up of a foundation frame, a foundation iron-bar beam frame, beam iron bars, principal rafter-shaped iron bars, and shield panels and soil, sand, and broken stones are packed into the box. CONSTITUTION:Plural foundation iron bars 3 are set between foundation frames 2 set in parallel on the ground, and principal rafter-shaped iron bars 6 are built in and fixed to the foundation frames 2. Beam frames 4 are set on the upper ends of the iron bars 6 and fixed, and shield panels 7 are fixed to the iron bars 6 with hook bolts to build up a box 8 of a nearly trapezoidal cross section. Broken stons, soil, and sand are packed into the box 8 to construct a principal rafter-shaped steel dam. Stabilized embankment having a simple structure can be easily constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gravity-type steel gassho dam that is constructed as an erosion control, a protection wall, or a retaining wall, and a method for constructing the same. Conventionally, this type of dam has been made of reinforced concrete or made of steel box frame, but dams made of reinforced concrete require a lot of temporary materials and manpower, which increases construction costs and takes a long time. was there.

On the other hand, dams made of steel box frames use a large amount of extremely heavy and large crushed stones that cannot be lifted by hand, making the filling process extremely troublesome. Furthermore, since this type of crushed stone is generally expensive, it was inevitable that construction costs would increase.

This invention was proposed in order to solve the above-mentioned conventional problems, and aims to provide a field-made gassho dam that allows erosion control, embankments, or retaining walls to be constructed extremely easily, in a short period of time, and at low cost. purpose.

Hereinafter, this invention will be explained with reference to an illustrated embodiment. The steel gassho dam 1 includes a plurality of foundation frames 2, foundation reinforcing bars 3, beam frames 4, beam reinforcing bars 5, gassho reinforcing bars 6, and a plurality of A box 8 having a substantially trapezoidal cross section is constructed from the shielding panel 7,
It is constructed by filling the head 8 with earth and sand or crushed stones.

The foundation frame 2 is formed of H-shaped steel, and is laid on the construction ground surface of the dam at appropriate intervals in the width direction of the foundation frame 20. The laid foundation Freno-2 is appropriately anchored to the ground with anchor bolts, etc.

Between the left and right foundation frames 2, 2, a plurality of foundation reinforcing bars 3, such as screw reinforcement bars, are laid at predetermined intervals in the longitudinal direction of the foundation frame 2, and both ends thereof are connected to the webs 2a, 2aK of the foundation frames 2, 2. Fixing nuts 9, 9 are screwed into the penetrating portions of the foundation reinforcing bars 3.

The beam frame 4 is formed of a chevron-shaped piece, and is installed directly above the left and right foundation frames 2, 2 at intervals narrower than the interval between the left and right foundation frames 2.2.

The installed beam frames 4, 4 are connected to the foundation frame 2 by the column fleno, 10, made of section steel such as II section steel.
2 are connected to each other. Pillar Flare A I Old
, arR frame 2 and the beam flanges 4 are erected at both ends in the longitudinal direction with a slight inclination, and both upper and lower ends thereof are connected to the foundation frame 2 and the beam beams 4 with bolts and nuts. In addition, a plurality of lattice reinforcing bars 12 are installed between the left and right column frames 10 and 10, and the lattice reinforcing bars 12
Both ends of the lattice reinforcing bars 12 are passed through the left and right column frames 10 and 10, and nuts are screwed into the penetrating portions of the lattice reinforcing bars 12. Between the left and right beam frames 4, 4, a plurality of beam reinforcing bars 5 made of threaded reinforcing bars are laid at predetermined intervals in the longitudinal direction of the beam flange 4. The vertical flanges 4a and 4aK of 4° are passed through, and fixing nuts 9.9 are screwed into the portions through which the beam reinforcing bars 5 pass.

Between the foundation frame 2 and the beam frame 4, a plurality of gassho reinforcing bars 6 made of threaded reinforcing bars are erected at predetermined intervals in the longitudinal direction of the foundation frame 2 and the beam frame 4, slightly tilted inward. Both ends are passed through the 7 langes 2b of the foundation frame 2 and the horizontal flange 4b of the beam frame 4, and fixing nuts 9, 9 are screwed into the portions where the gassho reinforcing bars 60 pass through. In addition, in order to connect the gassho reinforcing bars 6 to the beam frame 4, an abbreviated notch 4C is formed in the horizontal flange 4b of the beam frame 4, and the upper end of the gassho reinforcing bars 6 is passed through the temple notch 4C. A fixing nut 9 is screwed into the penetrating portion.

Further, a shielding panel 7 made of an asbestos slate board, a synthetic resin board, a corrugated chain board, a concrete board, a fiber concrete board, or the like is attached between the foundation frame 2 and the beam frame 4.

The shielding panels 7 are installed while facing each other sequentially in the width direction and the vertical direction, and each of the shielding panels 7 has a hook bolt 1.
1 to the gassho reinforcing bars 6.

The box 8 having a substantially trapezoidal cross section configured in this manner is filled with crushed stones and earth 14. In addition, the strength of the box 8 can be significantly increased by double-layering it on the outside and inside as shown in Figure t44 of the embodiment. If you fill the trap with cut gravel or other earth and sand, and fill the trap inside the outer box 8 with crushed stone (cobblestone),
It is possible to save on crushed stone and prevent soil from being washed away. In addition, due to the weight of crushed stones and earth, the left and right gassho reinforcement bars 6, 6
If it bulges outward, the left and right gassho reinforcing bars 6, 6 are tied together with a plurality of hoop reinforcing bars 15.

In such a configuration, during construction, first, the foundation frame 2.2 is installed on the excavated ground surface of the dam approximately parallel to the foundation frame 2 while appropriately connecting the foundation frame 2 in the longitudinal direction, and is appropriately fixed to the ground with anchor bolts, etc. .

Next, a plurality of foundation reinforcing bars 3 are installed between the left and right foundation frames A 2 + 2. The foundation reinforcing bars 3 are fixed by having both ends thereof penetrate the webs 2fL, 2a of the foundation frames 2, 2, and screwing fixing nuts 9, 9 into the penetrating portions. To connect the foundation frames 2.2, the sides of the web 2a and the flange 2 of the butt part of the foundation frames 2, 2 are connected.
Connecting plates) 13.13 are attached to the b side, and the ends of the foundation reinforcing bars 3 and gassho reinforcing bars 6 are passed through the connecting plates 13.13, the web 2a, and the flange 2b,
A fixing nut 9 is screwed into the penetrating portion.

Next, the gassho reinforcing bars 6 are built in, and the lower ends of the gassho reinforcing bars 6 are passed through the seven lunges 2b of the foundation frame 2, and fixed by screwing the fixing nuts 9 into the penetrating portions. When erecting gassho reinforcing bars 6, the work can be simplified by connecting a plurality of gassho reinforcing bars 6 into a unit by connecting members made of light bush-shaped steel or the like, and hoisting this unit with a crane. Immediately after erection, the gassho reinforcing bars 6 are supported by assembling a support made of steel pipes on the inside thereof, and leaning against the support.

Next, a beam frame 4 is installed on the upper end of the gassho reinforcing bar 6, the upper end of the gassho reinforcing bar 6 passes through the notch 4cVc of the beam frame 4, and a fixing nut 9 is screwed into the penetrating portion of the gassho reinforcing bar 6. In addition, a beam reinforcing bar 5 is laid between the left and right beam frames 4°4, and both ends of the fine reinforcing bar 5 are passed through the vertical flanges 4a, 4a of the left and right beam frames 4, 4, and 50 pieces of beam reinforcing bar; Screw on the fixing nut 9.9.

Next, install the continuous panels '1 one after another in the width direction and vertical direction, each with a hook pole).
11 to fix it to the gassho reinforcing bars 6.

Note that a conventional concrete block can also be used as the continuous panel 7. In this case, the concrete block is installed by inserting gassho reinforcing bars 6 into the holes of the concrete block.

Next, crushed stones and earth 14 are placed in a box 8 having a roughly trapezoidal cross section.
Fill it. In addition, if shoring l, steel pipes, etc. are used to support the gassho reinforcing bars 6 immediately after erection, they will be buried, and the horizontal parts tj of the shorings will have both ends attached to the constructed steel gassho weir vI-1. It can also be used as a flow channel by protruding from the side.

Next, as another example of this steel gassho dam, the structure illustrated in FIG. 9 will be described. A plurality of foundation frames 2 are installed at appropriate intervals in the width direction of the dam, and the foundation frames 2, 2 They are connected to each other by foundation reinforcing bars 3 to form a foundation part.

On the top of the foundation frame 2, beam frames 4 in multiple stages and rows are installed vertically and horizontally using beam reinforcing bars 5 and gassho reinforcing bars 6.
The left and right sides are connected using bolts and nuts.

In this case, as shown in FIG. 9, in the cross section of the dam, the beam reinforcing bars 5 and gassho reinforcing bars 6 are formed in a somewhat lattice shape, and beam frames 4 are formed at some or all of the intersection points of the lattice.
can be used to increase the rigidity of the entire dam.

Further, by decreasing the number of gassho reinforcing bars 6 from the lower part of the dam to the upper part, it is possible to form a trapezoidal box with a slightly stepped cross section of the dam.

In this case, it is also possible to form the beam frame 4, the foundation frame, and the beam frame 2 by using the same material, and the foundation frame 2 and the beam frame 4 can be arranged closely at the bottom of the necessary 0. , the upper part may be arranged roughly 7, #fT lg Figure t, 15'1 when the entire envelope gassho dam is implemented according to the present invention! In this example, C1 is a dam with a continuous panel disposed outside, but in order to illustrate the inside, the continuous panel is partially removed from the drawing 17.

In addition, 2 of the boxes having a roughly trapezoidal cross section shown in FIGS. 3 and 4.
In heavy-duty I'A construction, it may be a redundant structure in which the interior and exterior are completely separated, or it may be a composite I-1 structure in which the interior and exterior are interconnected by means of reinforcing bars or the like.

In the cross section of the dam as shown in Figure 9, it is possible to construct four double or triple J-trap dams by installing continuous panels on the gassho reinforcing bars 6 inside the dam. The dam is connected to each other by threaded reinforcing bars, specifically beam reinforcing bars 5 and foundation reinforcing bars 3, so multiple 'F(
Embankment 1j is a dam with a complex structure.

Since this invention consists of the above tl components, the following effects can be expected.

■ Since the structure is extremely simple, construction work can be simplified, labor can be saved, and the construction period can be significantly shortened.

■ The box is made of continuous panels made of shaped steel, reinforcing bars, asbestos slate, etc.
The box is constructed entirely from local materials, and the box can be filled with earth and sand generated in large quantities on site instead of expensive crushed stone, making it possible to significantly reduce construction costs.

■ As a gravity-type dam, it is constructed with an ideal trapezoidal cross-section, making it extremely stable structurally. .

■Thus, according to this invention, erosion control, embankments, or retaining walls can be constructed extremely easily, reliably, and at an extremely low cost.

■ Since the dam is constructed by interconnecting threaded reinforcing bars, foundation frames, and beam frames, it can be easily constructed according to the topography of the site.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the copper gassho dam, Figure 2 is a vertical cross-sectional view of the steel gassho dam, Figure 3 is a side view of the box of the steel gassho dam, and No. 4I\I is (
(A perspective view of the Gassho Weir made by No. 1. Figure 5 is a perspective view of the Gassho Weir made by Manufacturer No. 1. Fig. 7 is a perspective view showing the connecting part of the foundation frame, Fig. 8 is a cross-sectional view showing the enclosed state of the trl continuous panel; Beam frame of other embodiments) 1. Reinforcing bar arrangement j, i Fig. 14, Fig. 10 Fig. 10 is a perspective view of the dam from t.・Person, 3. Reinforcing bar with base η), 4. Beam 71 no person, 5. Beam reinforcing bar, (i. Gassho reinforcing bar, 7. Connecting panel, 8. Box, 9. Fixing nut. , 1()... Column Freno..., Jl
・・Futsukubo/I<1・, 12・・Hoop reinforcing bar, 13・
・Connection plate, 14. Crushed stone and earth, 15. Hoop reinforcing bar.

Claims (4)

[Claims] (1) A plurality of foundation frames are connected by a plurality of foundation reinforcing bars and installed in parallel, and on top of the foundation frames, a plurality of beam frames are installed in parallel vertically and horizontally, and the beam frames installed in parallel on the left and right are beams. The beam frames are connected by reinforcing bars and placed vertically in parallel, and one end is connected to the lower foundation frame using gassho reinforcing bars.The beam frames are connected by gassho reinforcing bars, which form a roughly box-shaped box body that is filled with earth and stones. A steel gassho dam. (2) The steel gassho dam according to claim 1, wherein either or both of the beam frame and the foundation frame are replaced with reinforcing bars. (3) A plurality of foundation frames are installed in parallel, and the foundation frames installed in parallel are connected to each other with a plurality of foundation reinforcing bars to form the lower surface of the box. The beam frames are installed side by side, and the 7 parallel beams are connected to each other with multiple beam reinforcing bars to form the upper surface of the box body, and the upper and lower surfaces are connected with multiple gassho reinforcing bars. . , a method for constructing a silver gassho dam, characterized by forming a central part of the box body, and building the dam by filling the inside of the box with earth and stones. (4) A feature of constructing a box having a substantially trapezoidal cross section in a complex or overlapping manner such as double or triple.
Ki4 gassho dam construction method.