JPH0762350B2 - 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 business of railways and roads is stopped and before the business 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 will be 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 and the like are 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-described problems, and it is possible to easily make a steep slope of an embankment in a short period of time, and to prevent the influence of spring water, rainwater, and the like. 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 position approximately as close to the shoulder as possible on the head of the embankment in a substantially horizontal direction. .

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 the threaded portions at both ends of the reinforcing bar 1 penetrating through the insertion hole of the derrick 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> Anchoring of anchor rebar (Fig. 3) Next, as shown in Fig. 3, on the slope slightly below the uprising member 2, incline slightly downward toward the center of the embankment. , The anchor hole 3 is drilled.

Then, the anchor rebar 31 is inserted into the anchor hole 3 as far as the hole.

To this anchor rebar 31, a pucker 32 is attached 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 metal fitting 33 is attached to the hole slightly outside the planned excavation line of the slope so that the end of the anchor bar 31 outside the hole slightly projects 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 grout material is put 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 work on the slope, the track or road is closed.

Then, as shown in FIG. 4, the slope around the anchor rebar 31 is excavated steeply 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 drain material (FIGS. 1, 4, and 6) Next, as shown in FIGS. 1 and 4, a plurality of drain materials 4 are arranged at intervals on the slope after excavation.

Further, the drain material 4 is installed vertically so as to be continuous in the vertical direction of the embankment.

This drain material 4 collects spring water and rainwater in the embankment,
This is for good drainage.

For example, as shown in FIG. 6, it is conceivable that the water permeable sheet 41 is formed in a tubular shape and a corrugated spacer 42 is attached to the inside of the water permeable sheet 41 to secure an internal space of the water permeable sheet 41.

<E> Installation of bag (Figs. 4 and 5) Next, as shown in Figs. 4 and 5, the bag 5 made of cloth or the like is placed on the drain material 4 over the entire slope after excavation. .

At this time, the exposed end portion 35 of the anchor reinforcing bar 31 penetrates the central portion of the bag body 5.

The penetrating portion of the anchor reinforcing bar 31 of the bag body 5 is perforated so that the mortar 51 injected therein does not flow out.

Next, the mortar 51 having early strength is injected into the bag body 5.

After the mortar 51 has developed a predetermined strength, a pressure bearing plate, a nut, etc. are attached to the exposed end portion 35 and fastened.

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. 7 and 8, it is possible to use a tensile member 6 instead of the anchor reinforcing bar 31 to introduce prestress.

In this case, first, the slope is excavated at a predetermined angle with a steep slope, and the tension member 6 is inserted into the hole drilled in the slope to insert the quick-setting member 61 or the like in the deep portion of the hole of the tension member. Fill and fix.

Next, the exposed end portion of the tension member 6 is penetrated, the bag body 5 is attached to the slope, and the mortar 51 is poured into the bag body 5.

After the mortar 51 develops a predetermined strength, the tension member 6 is tensioned to fix the exposed end portion of the tension member 6 to the bag body 5.

Finally, the grout material 62 is filled in the anchor hole, and the operation is completed.

<Other Example 2> In each of the above Examples, the reinforcing bar 1 was 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 use the anchor rebar 7 to compact the head of the embankment.

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 7 is inserted in the anchor hole.
Is inserted and fixed by the grout material 71.

<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 business of railways and roads is stopped and before the business is restarted.

However, in the conventional method using sprayed concrete, unless the strength of the concrete is sufficiently developed, the anchor cannot be tightened and it takes time.

In addition, there is a possibility that the work cannot be performed due to an unexpected accident (broken machine failure, etc.), and it takes a lot of work time, so it is not suitable for use in the steep slope construction method.

On the other hand, in the present invention, since the bag-shaped mold is present as compared with the sprayed concrete, the anchor can be tightened even if the strength of the concrete is small to some extent.

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 sprayed concrete, it may be floated from the ground due to spring water, rain water, etc., and it is difficult to reliably hold the slope.

On the other hand, according to the present invention, since the bag body made of cloth or the like is used as the concrete formwork, the adhesion to the ground is good.

Further, by disposing the drain material between the bag body and the slope, spring water, rainwater, etc. can be drained well.

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 and the like are heavy, the workability is poor and the working time is long.

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

<D> The present invention is particularly suitable for the work during the downtime of the 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 body only needs to be installed in the head of the embankment in a substantially horizontal direction, 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 FIGS. 3-5: Illustration of construction method FIG. 6: Illustration of drain material FIG. 8: Explanatory diagram of other example 1 FIG. 9: Explanatory diagram of other example 2

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoichi Otaka Yoichi Otaka 4199-1, Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa Rionz 3-502 (72) Inventor Satoshi Nishioka 4-3011-6 Iriya, Zama-shi, Kanagawa Zama Heights 2-1411 (72) Inventor Kazuyuki Nakamura 3-16-7 Hosoyama, Aso-ku, Kawasaki City, Kanagawa Prefecture (16) (72) Inventor Yukihiko Tamura 2-22-15, Katsuradai, Midori-ku, Yokohama City, Kanagawa Prefecture 106 (72) ) Inventor Toshinobu Sasaki 1241-4 Okamoto, Kamakura City, Kanagawa Prefecture Rojuman C-904, Kamakura (72) Inventor Kenzo Ochi 3-24-1-106 Kiritsuga, Midori-ku, Yokohama City, Kanagawa Prefecture (72) Inventor, Koji Zheng, Kawasaki, Kanagawa Prefecture 2-15-2-2 Tsuchihashi, Miyamae-ku, Ichi, 506 (72) Inventor Tatsuya Tsubouchi 1-2-2 Higashiarima, Miyamae-ku, Kawasaki-shi, Kanagawa

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 upholstery material so as to incline slightly toward the center of the embankment, and then The slopes around these anchor rebars are excavated more steeply, the exposed ends of the anchor rebars are penetrated, a bag is attached to the slope, mortar is injected into the bag, and the mortar A steep slope construction method for the embankment slope, characterized in that the exposed end of the anchor rebar is fixed to the bag after the strength of 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 fixed on the bellows placed at the upper end of the slope, then the slope below the riser is excavated at a steeper slope, and on the slope excavated at this steep slope, at the center of the embankment. Drill a hole so that it tilts slightly downward, insert the tension material into this hole, fix the inner part of the hole in the tension material, and then penetrate the exposed end of the tension material to form a bag on the slope. Attaching the mortar, the mortar is injected into the bag body, and after a predetermined strength is developed in the mortar, the tension material is tensioned to fix the exposed end of the tension material to the bag body, A 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.