JPH05195531A - Drawing work of reinforcing pile with cut in sheathing wall - Google Patents

Abstract

PURPOSE:To raise the efficiency of construction by a method in which an impact is applied to the top of a reinforcing pile exposed to release the close adhesion with the sheathing wall, and the reinforcing pile is drawn out. CONSTITUTION:In pulling out a reinforcing pile 1 having a cut in its intermediate part corresponding to a removing length, the sheathing wall 31 around the pile 1 is chipped to form a recessed part 5 around the pile 1. An impact such as striking and vibration is applied to the top of the pile 1 by an impacting means 8 to release close adhesion between the pile 1 and the wall 31. The reinforcing pile above the cut portion is drawn out by using a drawing machine, and the hole formed after drawing is packed with sand and soil and tamped. The reinforcing pile can thus be quickly, simply, and safely drawn out at low cost while preventing damage such as bending to the reinforcing part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a notched reinforcing material (mainly an H-shaped steel core material) in an earth retaining wall (mainly a soil cement wall, hereinafter referred to as a soil cement wall). It is related to the method of pulling out (punching out or removing).

[0002]

2. Description of the Related Art Conventionally, for example, a notched reinforcing material inserted into a soil cement wall, which was constructed prior to foundation work for a structure such as a highway shown in FIG. It is obliged to pull it out after the end (in addition to this, for example, the notched reinforcing material that became unnecessary,
In some cases, withdrawal may be required. But,
I will omit the explanation. ).

The following construction method is considered as a construction method for pulling out (removing) the above-mentioned notched reinforcing material.

That is, as schematically shown in FIG. 2, the soil cement wall at a portion where the notched reinforcing material is not inserted is cut or destroyed (shown by A), and the notched reinforcing material is inserted. Separated and separated soil cement walls.

After that, one side of the separated and separated soil cement wall is excavated (shown by a), and a tensile load is applied to the soil cement wall which has become free on the three sides, and the inside of the soil cement wall is cut. To generate a crack.

As a result, the adhesion between the notched reinforcing material and the soil cement wall material is released, and then the notched reinforcing material is pulled out through a pulling work machine such as a crane.

The traces of the notched reinforcing material extracted as described above are filled with earth and sand, and the next notched reinforcing material is taken out.

The subsequent work of pulling out the notched reinforcing material is performed in substantially the same manner as described above.

[0009]

Although the pulling-out method described above can surely perform the pulling-out work, it requires an operation or procedure of excavating in three directions and applying a tensile load.

Because of that, the movement or arrangement of the working machine,
It is necessary to repeat various operations, etc., workability is extremely poor, there is human loss, and work such as excavation and pulling on three sides is required, which is especially difficult,
Issues such as a significant extension of work time and an increase in work cost can be considered.

[0011]

SUMMARY OF THE INVENTION Therefore, the present invention has an object to drastically shorten the working time and to drastically omit the working process, or to facilitate the working and reduce the cost. , Adopt the following configuration.

That is, according to the method of extracting the notched reinforcing material in the earth retaining wall of the present invention, after the notched reinforcing material in the earth retaining wall is cued, the head of the notched reinforcing material is removed. Is a construction method in which impact means such as impact shock and vibration impact are added to the adhesive to break the adhesion between the earth retaining wall material and the cut-in reinforcement material, and then the cut-in reinforcement material is pulled out. ..

[0013]

Next, the operation (removal method) of the present invention will be described.

First, using a scraping machine or a scraping tool (not shown), scrape the soil cement wall material a little,
As shown in FIG. 2, a concave portion around the notched reinforcing material is formed, and the notched reinforcing material is cued.

When the hitting means by the drop hammer is adopted, it is preferable to reduce the cueing, but when the hitting means by vibration or the like is adopted, it is considered to be ideal to increase it slightly.

When one cue or continuous cueing is completed as described above, the percussion work heavy machine is moved, and the drop hammer is appropriately above the notched reinforcing material. Deploy in position.

Then, the drop hammer is dropped.
This drop is usually once, but may be repeated several times.

As described above, when the notched reinforcing material is hit with a drop hammer, the adhesion between the notched reinforcing material and the soil cement wall material is released (the difference between the physical properties of the two is utilized. Yes.).

Then, subsequently, the operation of striking another notched reinforcing material is performed, but the operation or procedure is performed in the same manner as described above.

After the adhesiveness between the one or several notched reinforcing materials and the soil cement wall material is released as described above, the one or several notched reinforcing materials are pulled out. Then, the one or several notched reinforcing members are sequentially pulled out through chucking by a pulling tool by a pulling work machine (not shown) and pulling out.

The extracted traces are filled with earth and sand and, if necessary, built up (compacted),
Here, all the work is completed.

The sequence, operation, and procedure of the cueing, striking means, or earth and sand filling work are merely examples, and the present invention is not limited to the above examples.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The notched reinforcing material 1 (H-shaped steel core material) to be pulled out according to the present invention is a soil cement wall 3 constructed in the vicinity of a foundation 2 such as a highway, a reinforcing bar structure or a skyscraper.
(It is called a wall such as a so-called earth retaining wall or a mountain retaining wall.) It is installed inside, and the cut-in reinforcing material 1 is taken into consideration in consideration of pulling out (removal) after the completion of construction. Reinforcement material 1
In the ground where is installed, it is 4
However, a cut portion 1a is formed at a portion below the removal length of the cut reinforcement material 1.

Generally, in the present invention, the notched reinforcing material 1 above the notched portion 1a is to be pulled out.

Therefore, the concrete pulling procedure will be explained below. Peeling the soil cement wall material 31 around the notched reinforcing material 1 through the peeling work (when excavating work is also used). The same applies to the following), and the recess 5 is formed around the cut reinforcing material 1.

As a general rule, the work for the cueing 6 by forming the recess 5 is carried out individually or continuously, but the operation or procedure is selected according to the situation at the site.

As described above, when the cueing 6 of the notched reinforcing material 1 is completed, the one notched reinforcing material 1 is used alone or several of the other notched reinforcing materials 1 are continuously cut. Reinforcement material 1
11, 112, etc. are provided with impact means 8 by hitting with a drop hammer 7 to reinforce the cut-in reinforcing material 1,
The adhesiveness 9 between the other reinforcing materials 111, 112 with cuts and the soil cement wall material 31 is released.

Of course, if it is insufficient to release the adhesion 9 by one hit, it is possible to repeat the hit with the drop hammer 7 several times.

In consideration of convenience and the like, the adhesiveness 9 is released individually or continuously, and one withdrawable reinforcing member 1 with a notch or one withdrawable. Several other notched reinforcements 111, 112 etc. are formed.

As described above, if one of the notched reinforcing members 1 that can be pulled out, or several other notched reinforcing members 111 and 112 that can be pulled out is formed, the pulling work machine ( Through the pulling tool 14 (not shown), for example, the notched reinforcing material 1 and another notched reinforcing material 11
1, 112, etc. are sequentially pulled out, but at that time, as described above, the notched reinforcing member 1, the other notched reinforcing members 111, 1
Since the notch 12a is provided in each of 12 and the like, the pulling out work can be performed easily and quickly.

Then, the extraction marks 10 are filled with earth and sand and are usually built and solidified as described above.

In the figure, 11 is a percussion work heavy machine, 12 is a leader, and 13 is a rope for raising and lowering the drop hammer 7.

The impact means 8 includes other vibrations, electric impacts, and the like.

[0035]

As described above, according to the present invention, after the incised reinforcing material is squeezed out, the impact is applied to the head or the like to bring the incised reinforcing material and the soil cement wall material into close contact with each other. It is a construction method that removes the property and then pulls out the notched reinforcing material, and has the following effects.

(1) The notched reinforcing material can be pulled out easily and with good workability.

(2) The pulling out work of the notched reinforcing material can be speeded up and facilitated, and the cost can be remarkably reduced.

(3) The work of pulling out the notched reinforcing material is
You can do it safely.

Further, in the present invention, as described above, the method is one in which the impacting means is performed after the head is slightly moved, and has the following effects.

(4) Without damaging the notched reinforcing material,
Can be pulled out.

(5) In particular, the occurrence of impact bending at the time of impact impact (striking means) is eliminated.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a construction situation of a notched reinforcing material to be pulled out.

FIG. 2 is a schematic plan view illustrating a procedure for pulling out a notched reinforcing material.

FIG. 3 is a schematic diagram for explaining the cueing of a notched reinforcing material.

FIG. 4 is a schematic diagram showing striking with a drop hammer.

FIG. 5 is a schematic view of a main part showing a relationship of adhesion between a notched reinforcing material and a soil cement wall material.

FIG. 6 is a schematic view of a main part for explaining a situation of pulling out a notched reinforcing material.

FIG. 7 is a schematic view of a main part showing a situation where earth and sand are filled in a trace of pulling out a notched reinforcing material.

[Explanation of sign]

 1 Reinforcing Material with Cut 1a Cut 2 Foundation 3 Soil Cement Wall 31 Soil Cement Wall Material 4 Peel 5 Recess 6 Heading out 7 Drop Hammer 8 Impact Means 9 Adhesion 10 Trace 11 Impact Heavy Machine 12 Leader 13 Rope 14 Pulling out tool 111 Other notched reinforcing material 112 Other notched reinforcing material

Claims (5)

[Claims] 1. The earth retaining wall material is formed by locating the notched reinforcing material in the earth retaining wall and then adding impact means such as impact impact or vibration impact to the head of the notched reinforcing material. And a method of removing the indented reinforcing material in the earth retaining wall configured to pull out the indented reinforcing material. 2. The method for extracting the notched reinforcing material in the earth retaining wall according to claim 1, wherein the earth retaining wall according to claim 1 is a soil cement wall. 3. The cue according to claim 1, wherein the earth retaining wall, at least the earth and sand around the cut-in reinforcing material is eliminated to form a recess in the periphery, and the at least cut-in is performed. The method for pulling out the notched reinforcing material in the earth retaining wall according to claim 1, wherein the head around the reinforcing material is exposed in the ground. 4. The earth retaining wall according to claim 2, wherein the earth and sand in the vicinity of the notch of the notched reinforcing material according to claim 2 and the soil cement wall are formed by means of an abrasion work. A construction method to pull out the notched reinforcement material. 5. The method for pulling out the notched reinforcing material in the earth retaining wall according to claim 1, wherein the notched reinforcing material of claim 1 is an H-shaped steel.