JP2599297B2 - How to correct the slope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to the slope of a slope of an already completed embankment,
It relates to a method of correcting a steeper gradient.

<Conventional technology> Embankment is a method in which a wide flat surface is newly created by raising the soil, and a house, a railroad, a road, and the like are provided thereon and used.

The slope of the slope of such embankments is generally formed by the angle of repose of the soil, but if the slope is modified to a steep one, great benefits can be obtained, especially in cities where land prices are soaring.

Conventionally, many piles of H steel or the like are driven vertically, and a pile is inserted horizontally between the piles to retain the soil, or a tie rod is installed in the ground to prevent collapse of the slope. The construction method is adopted.

<Problems to be Solved by the Present Invention> Such a conventional construction method is uneconomical in that the construction scale is large, and a great deal of cost and construction time are required.

In addition, since large construction machinery is required, the construction may be extremely difficult depending on the terrain because the machinery cannot access the site.

In particular, when there is a house on a flat surface on a slope or used for railways, even if the slope is slightly loosened by excavation, it will cause enormous damage.

<Object of the present invention> The present invention has been made to solve such a problem, and the slope can be corrected steeply by a simple construction with almost no influence on the land thereon. The aim is to provide a method.

<Configuration of the Present Invention> Next, an embodiment of the present invention will be described for the case where the gradient of the embankment of a railway is corrected.

<A> First-stage excavation (Fig. 1) The first-stage excavation is performed from the uppermost shoulder of the slope 1.

The angle of this excavation is an angle to be corrected, and is set to a gradient steeper than the slope of the existing slope (substantially vertical in the figure of the embodiment).

The depth of the first-stage excavation is set to a size that does not affect the structure above the embankment, and is determined by the soil quality, gradient, and the like of the embankment.

<B> Applying a slide plate (FIG. 2) The new excavated surface is covered with the slide plate 2.

The slide plate 2 is formed by using a long plate such as a steel sheet pile in a horizontal direction, and in particular, has a structure in which a plurality of long holes 3 are opened in parallel in a vertical direction.

<C> Bolt insertion and fixing (Fig. 3) An anchor bolt 4 is inserted into the elongated hole 3 of the slide plate 2 from outside.
And the anchor bolt 4 itself is inserted into the embankment.

At this time, it is advantageous to penetrate the anchor bolt to a position close to below the long hole 3 in order to increase the descending range of the slide plate 2.

As a method of inserting the anchor bolt 4 into the embankment, a known method such as a method of opening a hole with a drilling machine in advance and inserting the anchor bolt 4 into the hole can be adopted.

After being inserted into the embankment, a hardening agent such as mortar is injected around the anchor bolt 4 to fix the anchor bolt 4 to the ground.

<D> Head treatment of anchor bolt Only the head of the anchor bolt 4 is exposed to the outside from the elongated hole 3 of the slide plate 2.

A plate 5 having an area larger than the width of the elongated hole 3 is fixed to the exposed portion.

As a result, the slide plate 2 can be slid in the vertical direction by using the anchor bolt 4 penetrating the elongated hole 3 as a guide member.

<E> Second-stage excavation (Fig. 4) The above operation completes the protection of the first-stage new slope by the slide plate 2.

 Therefore, the second stage excavation is performed.

Then, since the lower surface of the slide plate 2 is no longer supported, the slide plate 2 gradually descends along the elongated hole 3 according to the excavation height.

Therefore, without exposing the new excavation surface to the outside,
Excavation can be continued while always protecting from the external environment and preventing collapse with the anchor bolts 4.

<F> Subsequent work (Fig. 5) After the slide plate 2 has been lowered by the length of the elongated hole 3, the lower slide plate 2 is attached in the same manner as in the above-described process to protect the surface from the external environment. Continue drilling.

<Effects of the present invention> Since the present invention is constructed in the above order, the following effects can be achieved.

<B> Because it is a method of accumulating small-scale construction,
Simple construction with small machines and human power is possible.

Therefore, not only is it economical, but it is also possible to reliably perform construction work even on scaffolds and in poor terrain.

<B> Rather than excavating a large area at once, this is a construction method in which the slide plate is gradually lowered and the excavation is advanced while protecting its surface.

Therefore, even if the railway vehicle is running on the upper plane, the correction of the slope can be completed without affecting the operation.

<C> The newly excavated ground is unstable and easily collapsed by rainfall or earthquake.

However, according to the method of the present invention, the new ground is always covered with the descending slide plate and is fixed to the embankment by the anchor bolts, so that it does not collapse even due to a change in the external environment or vibration.

[Brief description of the drawings]

 1 to 4: explanatory views of the construction sequence of the present invention FIG. 5: perspective view of the construction state

Continuation of the front page (72) Inventor Yukihiko Tamura 2-22-15 Katsuradai, Midori-ku, Yokohama-shi, Kanagawa Presidious 106 (72) Inventor Tetsu Nishioka 4-3011-6, 2- 1411 (72) Iriya, Zama-shi, Kanagawa ) Inventor Koji Zheng 2-15-2-506, Tsuchihashi, Miyamae-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Tatsuya 2-13-12, Miyazaki, Miyama-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Susumu Kadowaki Chiba City, Chiba Prefecture 288-153 Naganuma-cho (72) Inventor Yoichi Otaka 41199-1,3-502-72, Midori-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Toshinobu Sasaki 7-15-6 Nagatsuda, Midori-ku, Yokohama-shi, Kanagawa Izumi-so 206 ( 56) References Japanese Utility Model Showa 49-69209 (JP, U) Japanese Utility Model Showa 52-79606 (JP, U) Japanese Utility Model Showa 59-24446 (JP, U)

Claims (1)

(57) [Claims] (1) When correcting the slope of a slope of an existing embankment, a small depth is excavated at a new angle to be corrected from above the slope, and the excavated surface is cut into a longitudinal slot. Cover with an open slide plate, insert an anchor bolt into the embankment through this long hole, fix it, and excavate the slope while lowering the slide plate while supporting it with the anchor bolt, correcting slope slope Method