JPH0762349B2 - Method of making steep slope on embankment slope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for making a steep slope on an embankment slope of a railway, a road or the like.

<Prior Art> In recent years, efficient use and advanced use of land are required, especially in urban areas.

However, as structures such as railroads and roads, embankment type structures are often used even in urban areas and occupy large sites.

Therefore, the slope of the embankment is made steep and effective use of the resulting land is attempted.

As a conventional steep slope construction method, a method of excavating the slope of the embankment to a steeper slope and spraying concrete on the slope after the excavation, or a method of covering the slope with a concrete plate or steel sheet pile is used. Has been.

<Problems to be Solved by the Present Invention> The conventional steep slope construction method described above has the following problems.

<B> In the steep slope construction method, it is necessary to complete the work within a short period of time after the operation of the railway, the road, etc. is stopped and the operation is restarted.

However, in the conventional method using sprayed concrete, it takes time to develop the strength of the concrete, and it may be impossible to work due to an unexpected accident (breakdown machine failure, etc.). It is not suitable when used for chemical methods.

<B> Further, in the case of sprayed concrete, it may be floated from the ground due to spring water, rain water, etc., and it becomes difficult to reliably control the slope.

<C> In the conventional method of covering the slope with a concrete plate or a steel sheet pile, since the concrete plate or the like is heavy, the workability is poor and the working time is long.

<Purpose of the present invention> The present invention has been made to solve the above problems, it is possible to easily steep the embankment in a short period of time, and the influence of spring water, rainwater, etc. It aims to provide a steep slope construction method for the embankment slope that is rarely received.

<Structure of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

<A> Compaction of the head of the embankment (Figs. 1 and 2) First, as shown in Fig. 2, a through hole is drilled in a substantially horizontal direction at a position on the head of the embankment as close to the shoulder as possible. .

Then, the reinforcing bar 1 is inserted into the hole and penetrated, and both ends thereof are exposed outside the hole.

Threaded portions are formed in advance on both exposed ends of the reinforcing bar 1.

On the other hand, along the extension direction of the embankment, the uprising members 2 are arranged at the upper ends of the slopes on both sides.

For this upholstery member 2, for example, a channel steel having a U-shaped cross section is used, and it is arranged so that the groove portion faces the outside.

In addition, a plurality of insertion holes for the reinforcing bar 1 are opened at intervals on the contact surface of the uprising member 2 with the slope, and the reinforcing bar 1 is inserted in the insertion holes.
Insert and place the exposed screw part of.

It should be noted that work can be easily carried out if the uprising member 2 is of a length that can be held by hand.

Then, a nut or the like is attached and fastened to both ends of the reinforcing bar 1 penetrating through the insertion hole of the uprising member 2.

As a result, the uprising member 2 acts as a bearing plate, so that the head of the embankment can be compacted from the slopes on both sides.

<B> Anchor rebar anchoring (Fig. 3) Next, as shown in Fig. 3, on the slope slightly below the riser 2, incline slightly downward toward the center of the embankment. , The two upper and lower anchor holes 3 are drilled.

Then, in the upper and lower anchor holes 3, the anchor rebar 31
Insert it all the way into the hole

A packer 32 is attached to the anchor reinforcing bar 31 on the far side of the hole on the sloped excavation line.

Further, the anchor rebar 31 is detachably connected by a joint fitting 33 so that the outside of the hole of the planned excavation line on the slope can be removed.

However, after excavation of the slope, the joint fitting 33 is attached to the outside of the hole from the planned excavation line of the slope so that the end of the anchor rebar 31 outside the hole slightly protrudes from the slope.

In addition, after excavation of the slope, a screw portion is formed in advance in a portion of the anchor rebar 31 that protrudes from the slope.

Then, the grant material is inserted into the anchor hole 3 by an injection pipe or the like.
34 is filled, and while the grout material 34 is hardened, the end of the anchor rebar 31 outside the hole is fixed to a bearing plate or the like arranged on the slope.

<C> Excavation on the slope (Fig. 4) Before excavation on the slope, the track or road is closed.

Then, as shown in FIG. 4, the slopes around the upper and lower anchor rebars 31 are steeply excavated at a predetermined angle.

Simultaneously with the excavation, the joint fitting 33 is removed, and the hole outside portion of the anchor reinforcing bar 31 is removed.

The packer 32 is attached so that the grout material 34 can be prevented from flowing out from the anchor hole 3.

<D> Installation of mesh body (Fig. 4) Next, as shown in Fig. 4, the exposed end portions 35 of the upper and lower anchor rebars 31 are made to penetrate the upper and lower edge portions of the mesh body 4 and the method after excavation is performed. The net body 4 is stretched on the surface.

Further, the exposed end portion 35 is made to penetrate through the insertion hole of the uprising member 2 arranged on the slope along the extension direction of the embankment.

Then, a nut or the like is attached to the exposed end portion 35 and fastened.

As a result, the upper and lower edges of the mesh body 4 are pressed against the slope by the uprising member 2, and the mesh body 4 can be reliably stretched on the slope.

For the net body 4 of the present invention, for example, a wire net such as expanded metal or a welded wire net, a plastic net, or the like can be used.

By using the net body 4 as the pressing member for the slope, spring water, rainwater, etc. can be drained well from the mesh of the net body 4, and the influence of spring water, rainwater, etc. is reduced.

Further, by disposing a sheet member having water permeability between the mesh body 4 and the slope, it is possible to prevent earth and sand finer than the mesh of the mesh body 4 from collapsing.

Further, a drain material for collecting and draining spring water or rainwater may be installed between the net body 4 and the slope.

After constructing the first stage as described above, the construction is proceeded downward in the same manner as the second stage and the third stage.

After the construction is completed to the end, the track or road will be closed.

<Other Example 1> As another example, as shown in FIGS. 5 and 6, it is possible to use a tensile member 5 instead of the anchor reinforcing bar 31 to introduce prestress.

In this case, first, the slope is steeply drilled at a predetermined angle, the tensile material 5 is inserted into the hole drilled in the slope, and the deep part of the hole of the tensile material is filled with the quick-setting material 51 or the like. And fix it.

Next, the net body 4 is stretched on the slopes between the exposed end portions of the upper and lower tension members 5 by the same method as described above, and the reentrant member 2 is attached.

Then, after the quick-setting material 51 is hardened, the tension material 5 is tensioned, and the exposed end portion is agitated and fixed to the material 2.

Finally, the grout material 52 is filled in the anchor holes, and the work is completed.

<Other Example 2> In each of the above examples, the reinforcing bar 1 is installed in the head of the embankment in a substantially horizontal direction, but as shown in FIG. When one side has a cut surface or the like, it is conceivable to compact the head of the embankment by using the anchor rebar 6.

In this case, an anchor hole is drilled in the head of the embankment in a substantially horizontal direction from the slope, and the anchor rebar 6 is inserted in the anchor hole.
Is a method of inserting and fixing with the grout material 61.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> In the steep slope construction method, it is necessary to complete the work within a short period of time after the operation of the railway, the road, etc. is stopped and the operation is restarted.

However, in the conventional method using sprayed concrete, it takes time to develop the strength of the concrete, and it may be impossible to work due to an unexpected accident (breakdown machine failure, etc.). It is not suitable when used for chemical methods.

On the other hand, according to the present invention, the slope can be surely pressed down by the net body of the off-the-shelf product.

Therefore, there is no need to wait for the strength to develop as in the conventional shotcrete construction method.

Therefore, the construction can be completed in a short time, and it can be said that the method is suitable for the steep slope construction method of the embankment.

Further, since no device such as a spraying machine is required, the work is not interrupted by an unexpected accident (breakdown of the spraying machine, etc.).

<B> In the case of conventional shotcrete, springs, rainwater, etc. may cause it to float from the ground, making it difficult to reliably control the slope.

On the other hand, according to the present invention, by using the mesh body as the pressing member for the slope, spring water, rainwater, etc. can be satisfactorily drained from the mesh of the mesh body.

Therefore, the slope can be surely suppressed without being affected by spring water, rainwater, or the like.

<C> In the conventional method of covering the slope with a concrete plate or a steel sheet pile, since the concrete plate or the like is heavy, the workability is poor and the working time is long.

However, according to the present invention, since the lightweight net body is used, the mounting work can be performed easily and in a short time, and the workability is improved.

<D> The present invention is particularly suitable for work during the downtime of a commercial line because the construction can be performed in a short time.

<E> The head of the embankment is compacted early by reinforcing bars without damaging the slope, so that lateral deformation of the embankment that occurs during excavation of the slope can be suppressed.

Therefore, it is possible to minimize the subsidence and the horizontal displacement of the roadbed or the roadbed on the top surface of the embankment, which improves safety.

<F> Since the work of compacting the head of the embankment need only be provided with reinforcing bars or the like in a substantially horizontal direction on the head of the embankment, all the work can be performed from the side.

Therefore, it is not necessary to close the route, and the work can be performed at a slow speed.

Therefore, it is possible to spare time for the work after the line is closed.

[Brief description of drawings]

 FIG. 1: Illustration of an embodiment of the present invention FIG. 2: Illustration of compaction of the head of the embankment FIG. 3, 4: Illustration of construction method FIGS. 5 and 6: Other example 1 Explanatory drawing FIG. 7: Explanatory drawing of other Example 2

(72) Inventor Yoichi Otaka 4199-1, Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa Rion's 3-502 (72) Inventor Satoshi Nishioka 4-3011-6 Iriya, Zama-shi, Kanagawa Prefecture 2 Zama Heights 2 ―1411 (72) Inventor Kazuyuki Nakamura 3-16-7 Hosoyama, Aso-ku, Kawasaki-shi, Kanagawa (72) Inventor Yukihiko Tamura 2-22-15 Katsuradai, Midori-ku, Yokohama-shi, Kanagawa Plastic seed Katsura 106 (72) Inventor Toshinobu Sasaki 1241-4 Okamoto, Kamakura City, Kanagawa Prefecture C-904 Kamakura C-904 (72) Inventor Kenzo Ochi 3-24-1-106 (72) Kirigigaoka, Midori-ku, Yokohama-shi Kanagawa (72) In front of Miyamae-ku, Kawasaki-shi, Kanagawa Tsubashi 2-15-2-506 (72) Inventor Tatsuya Tsubouchi 1-2-2 Higashiarima, Miyamae-ku, Kawasaki City, Kanagawa Prefecture

Claims (3)

[Claims] 1. A method of excavating a slope of a fill body to make it steep, in which a rebar is pierced through a head of the fill body in a substantially horizontal direction, and both ends of the rebar are along an extension direction of the fill body. Anchored to the upholstery material placed at the upper end of the slope, and anchored to the slope below the upholstered material in two steps, vertically inclining slightly toward the center of the embankment. Then, the slopes around these anchor rebars are excavated more steeply, a net is stretched over the slopes between the exposed ends of the upper and lower anchor rebars, and the upper and lower edges of the net are sandwiched. Then, the steep slope construction method of the embankment slope is characterized in that the exposed end of the anchor rebar is fixed to the waving material arranged on the slope along the extension direction of the embankment. 2. A method of excavating a slope of a fill body to make it steep, in which a rebar is pierced horizontally in the head of the fill body, and both ends of the rebar are extended along the extension direction of the fill body. It is settled on the upholstery material placed at the upper end of the slope, then the slope below the upholstery is excavated at a steeper slope, and the slope of the steep slope is centered on the embankment. Drilled in two steps vertically so as to incline downward, insert the tension material into this hole, fix the inner part of the hole in the tension material, and set the slope between the exposed ends of the upper and lower tension materials. It is characterized in that a net is stretched over the upper and lower edges of the net, and the tension member is tensioned and fixed to the waving material placed on the slope along the extension direction of the embankment. The steep slope construction method for the embankment slope. 3. The steep slope construction method for the embankment slope according to claim 1, wherein the head of the embankment is replaced by a reinforcing bar which is penetrated in a substantially horizontal direction. A steep slope construction method for the embankment slope where anchors are fixed to the head in a substantially horizontal direction.