JPS609177B2 - Ground protection method for slopes and mountains - Google Patents

Description

[Detailed Description of the Invention] Conventionally, slopes were constructed by excavating the ground or using embankments, and the protection of the slopes was finished according to the topography and condition of the ground. Complete greening methods using grass, etc. require a considerable amount of time to completely protect the slope, and there are many problems in various aspects such as the machinery, equipment, and human power used for the work.

Therefore, in slope reinforcement work, etc., instead of the above-mentioned complete greening with turf, etc., slope reinforcement methods such as using precast concrete blocks for on-site construction of slope frames and pouring concrete on-site are now being adopted. has been done.

However, in the former slope reinforcement method using precast concrete members, the weight of the precast concrete members is generally large, making it difficult to perform construction on steep slopes.

In addition, in the latter method of slope reinforcement, in which pouring concrete is placed on the ground, concrete flows out from between the ground surface of the ground and the formwork, which is a problem, and it is difficult to use on steep slopes. Formwork, reinforcing bars, and concrete pouring had very poor workability, and furthermore, the construction costs were high, posing an economic problem.

Therefore, in order to eliminate the above-mentioned conventional defects, the present invention manufactures a frame-shaped reinforcing bar in advance by connecting the upper and lower horizontal bars and the longitudinal bars on both sides in a factory, and then connects the upper and lower horizontal bars of the frame-shaped reinforcing bar on site. Screw together the flanged mounting tubes of the formwork mounting tubes into the screws on the protruding parts on both sides, and connect a large number of frame-shaped reinforcing bars with the above-mentioned mounting tubes to the main bars and arrange them in parallel at appropriate intervals. A suitable mesh of the deformable wire mesh formwork on both sides is attached to the above-mentioned mounting tube by competing and holding pieces to constitute a legal frame reinforcing bar,
We assemble slope reinforcing bars that can be easily deformed on-site without the need for machines such as welding machines, and install them using anchors at required points on the ground surface of slopes and ground, and automatically This relates to a ground protection method for slopes and ground, which is characterized by deforming along the unevenness of the slope and spraying concrete inside and outside of the slope reinforcing bars to complete a reinforced concrete slope.

To explain the structure of one embodiment of the present invention shown in the drawings, A indicates the legal frame reinforcing bars that form the bones of the legal frame, 1 is the main reinforcement thereof, and 2 is the frame-shaped reinforcing bar that is assembled and manufactured in the factory. , bend 4 the intermediate sides of the upper and lower horizontal bars 3 parallel to each other at appropriate intervals upward or downward, and connect the outer parts of the bent parts 4 with vertical bars 5 on both sides by welding or the like. Transverse muscle 3
A reinforcing bar 2 is constructed by installing screws 6 at the protruding tips on both sides of the reinforcing bar 2 .

a indicates a formwork attachment tool, 7 is a mounting tube for formwork attachment odor a,
A female screw 8 is provided in one end, a large-diameter collar 9 is provided at one end of the outer periphery, and a circumferential groove 10 is provided on the other side of the large-diameter collar 9 at an appropriate slight interval. Small-diameter flanges 11 and 12 are arranged side by side at an appropriate interval on the outer pond end, and a circumferential groove 13 is provided between the small-diameter flanges 11 and 12 to extend the outer side of the small-diameter flanges 12 on the pond side. There is no taper on one side 14, but in order to give elasticity to the other side of the mounting tube 7, a cut groove 15 is provided at the center of the other end surface to reach one side of the first side small collar 11.

Reference numeral 16 denotes a U-shaped holding piece, 18, which is provided with a cut groove 17 in a disc having the same diameter as the Oyotsuba 9 and is removably iron-attached to the circumferential groove 10' of the mounting tube 7.
It is a frame-shaped main reinforcement spacing made of a synthetic resin board, etc., and several main reinforcement competition holes 19 are arranged in parallel at appropriate intervals, and the main reinforcement joining holes 19 on both vertical pieces are on the 1 side, upper and lower, horizontally. The main reinforcement formation holes 19 on each side are narrowly opened □20 to the opposite side.

21 is a deformable formwork made of wire mesh.

The above-mentioned legal frame reinforcing bars A are constituted by assembling main bars 1, frame reinforcing bars 2, form fittings a, wire mesh forms 21, and the like. 22 is an anchor, 23 is the ground surface of a slope or a rock, 24 is a wire mesh laid on the ground surface 23, and 25 is sprayed concrete or mortar.

Next, its effect will be explained.

First, screw the internal threads 8 of the mounting tube 7 with the large-diameter flanges 9 of the formwork fixture a onto the screws 6 on both sides of the upper and lower transverse reinforcements 3 of the reinforcing bars 2, and attach a large number of the mounting tubes 7 to the four main bars 1. The reinforcing bars 2 are joined together, and the bent portions 4 of the upper and lower transverse bars 3 of the reinforcing bars 2 are attached to the main bars 1.
are engaged with each other and arranged in parallel at appropriate intervals. At that time, the main reinforcement spacing 18 shown in Fig. 5 is also used, and the four main reinforcement 1
When joining a large number of reinforcing bars 2 to the main bar, for example, as shown in FIG.
The reinforcing bars 2 are connected to the four main bars 1, and the main bar spacing retainer 18 is connected to the two main bars 1 on the upper and lower sides of the 1st side, respectively, so that the reinforcing bars 2 and the main bar spacing retaining smell 18 are connected to the four main bars 1. The bent portions 4 of the upper and lower transverse bars 3 of the reinforcing bars 2 are engaged with the main bars 1, respectively, and the reinforcing holes 19 at the four corners of the main bar spacing holder 18 are connected to the four main bars 1. If the main reinforcement spacing retainer 18 is interposed between the adjacent main reinforcements 1 by engaging them from the entrances 20, the main reinforcement spacing 18 will ensure that the spacing between the main reinforcements 1 is maintained at a predetermined level, and the main reinforcements 1 will be arranged in an orderly manner. It serves to construct the ideal slope reinforcing bar A.Then, its main bar 1
A wire mesh formwork (hereinafter simply referred to as formwork) is placed on both sides of the frame.

) 21 respectively, and after ironing the appropriate mesh of the formwork 21 to the large-diameter collar 9 to the mounting cylinder 7 of the formwork installation odor a, insert the U-shaped holding piece 16 into the circumferential groove 10 of the mounting cylinder 7. When the steel is attached from above, the formwork 21 is held between the large-diameter collar 9 of the mounting tube 7 and the U-shaped holding piece 16, and the main reinforcement 1, reinforcing bar 2, and formwork 2 on both sides are
1 are fixed together to constitute the slope reinforcing bars A. Therefore, the slope reinforcing bars A are placed as required on the ground surface 23 of the slope and the ground, and the anchors 22 are hooked to the reinforcing bars 2, etc., and driven into the ground. ground surface 2
3. Attach firmly to the required location on the top.

Next, a wire mesh 24 is laid on the ground surface 23 surrounded by the slope reinforcing bars A, and a suitable mesh at the edge of the wire mesh 24 is attached to the mounting tube 7 of the formwork installation odor a of the surrounding slope reinforcing bars A. Iron and wire mesh 2
4 is hooked on the tip circumferential groove 13, the edge is connected to the legal frame reinforcing bars A, and the wire mesh 24 is laid on the ground surface 23.

After that, concrete or mortar (hereinafter simply referred to as concrete) is applied.

) 25 on the ground surface 2 where the legal frame reinforcing bars A and the wire mesh 24 are laid.
3 to complete a reinforced concrete slope wall with a slope frame on the ground surface 23, thereby protecting the slope and the ground. At that time, the selection of concrete 25 and the amount of spraying are determined as appropriate depending on the condition of the slope and the ground, the purpose, etc.

In addition, instead of the plate-shaped U-shaped holding piece 16 that is joined to the circumferential groove 10 of the mounting tube 7 of the above-mentioned formwork mounting odor a, a similar shape to the U-shaped holding piece 16 is used to reduce the thickness from the closing side. Using a U-shaped wedge holding piece that becomes thinner toward the side, drive the U-shaped wedge into the cylindrical groove of the mounting joint 7, and press and hold the formwork 21 between this and the large collar 9 of the mounting cylinder 7. Even if you do this, it will work on the same machine as above.

Since the present invention protects the slope and the ground as described above, the slope reinforcing bars that form the bones of the slope frame for ground protection are connected in advance to the upper and lower vertical reinforcements and the longitudinal reinforcements on both sides in the factory. Then, the mounting tubes of the formwork mounting shell are screwed into the screws on both side protrusions of the upper and lower transverse bars of the frame-shaped reinforcing bars that have been assembled and brought to the site, and a plurality of frame-shaped reinforcing bars with the above-mentioned mounting tubes are attached. On both sides, a suitable mesh of the deformable wire mesh formwork is iron-fitted to the above-mentioned mounting tube up to its armor, and a presser piece is placed in the circumferential groove of the mounting tube. By iron-bonding, the formwork is held between the collar of the mounting tube and the holding piece, and the main reinforcement, frame-shaped reinforcing bars, and formwork are fixed together and constituted by them.

Therefore, on-site, workers can easily assemble the main bars, reinforcing bars, formwork fixtures, and formwork to construct the slope reinforcing bars without requiring machines such as welding machines to assemble the slope reinforcing bars. In addition, the main bars, auxiliary bars, and formwork of the slope reinforcing bars are prefabricated materials, and they are assembled in advance to construct the slope reinforcing bars, making the work easier. The labor required for assembling reinforcing bars and formwork on slopes with poor conditions is saved, and it is also lighter than conventional precast concrete members, making installation work easier and more accurate and improving work efficiency.

Furthermore, since the formwork used is a deformable wire mesh that can adapt to the unevenness of the ground surface, construction is easy without the need for leveling the ground surface, and filling the formwork with concrete is easy. By spraying, concrete can be easily sprayed into formwork on a slope.

In particular, since shotcrete has a low slump, concrete will not flow out from between the formwork and the ground surface of the slope or rock. Moreover, unlike the conventional shotcrete method, the shotcrete is used as an effective structural member, so when spraying concrete from the same machine as the conventional shotcrete method, Compared to conventional ones, the bending stiffness and bending strength of the cross section are significantly increased, which has the advantages of reinforced concrete member structure, making work easier, faster, more reliable, and
It has the advantage of being economically efficient.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional side view of a slope reinforcing bar used for protecting slopes and earth ground, showing one embodiment of the present invention, Fig. 2 is an exploded slope view of its formwork fixture, and Fig. 3 is an exploded slope view of the same method as above. FIG. 4 is a side sectional view, and FIG. 5 is a slope view of the main bar spacing holder for the slope reinforcing bars. A...Framing reinforcing bars, 1...Main bars, 2...
...Frame reinforcement, 3...Horizontal reinforcement, 6...Screw, a
...Formwork fixture, 7...Mounting tube, 8...
・Female thread, 9...Flame, 10...Peripheral groove, 16
... Pressing piece, 21 ... Wire mesh formwork, 2
2...Anchor, 23...Ground surface, 25.
··…concrete. O5 diagram new Z diagram O3 diagram O4 old diagram

Claims (1)

[Claims] 1. A frame-shaped reinforcing bar is manufactured in advance by connecting the upper and lower horizontal bars and the vertical bars on both sides at the factory, and the formwork fixtures are attached with flanges to the screws on the protruding parts on both sides of the upper and lower transverse bars of the frame-shaped reinforcing bar on site. The tubes are screwed together, and a large number of the frame-shaped reinforcing bars with the above-mentioned mounting tubes are fitted to the plurality of main bars and arranged in parallel at appropriate intervals, and on both sides, the appropriate mesh of the deformable wire mesh formwork is connected to the above-mentioned. Fit the mounting tube up to its flange, fit a presser piece into the circumferential groove of the mounting tube, and sandwich the formwork between the flange of the mounting tube and the presser piece to form a slope reinforcing bar. A ground protection method for slopes and ground, characterized in that the above-mentioned slope reinforcing bars are installed at required locations on the ground surface of the earth using anchors, and concrete is sprayed onto the slope reinforcing bars to create a reinforced concrete slope. .