JP2003213686A - Construction method of earth retaining wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of earth retaining wall capable of performing a construction under a sever condition such as no setting place for a temporary scaffold, and suppressing the term of works and the construction cost. <P>SOLUTION: In this construction method of earth retaining wall, an inclinable inclined mast part is provided between a chuck part and a mast part through a rotating seat. Accordingly, the rotating motion of the inclined mast part within the vertical plane is never disturbed by the existing pile grasping part or the like, and the inclined mast part is rotatable within the vertical plane to the existing pile grasping part, so that both a vertical pile or pile sheet and an oblique pile can be pressed in. Thus, the temporary scaffold is dispensed with, and construction of an earth retaining wall or the like can be performed even in a narrow space having no setting place for the temporary scaffold, which is contributable to the shortening of the term of works and the saving of the construction cost. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing an earth retaining wall using a self-propelled press-fitting construction machine.

[0002]

2. Description of the Related Art A concrete retaining wall represented by an L-shaped retaining wall has been the mainstream of earth retaining walls such as road retaining walls. However, it is difficult to install a normal concrete retaining wall in a place where construction conditions are severe, such as near construction, existing traffic, and impact on the surrounding environment. In that case, steel pipe sheet pile, steel sheet pile, box type sheet pile, H type sheet pile, etc. The earth retaining wall of the structure which made the sheet pile and underground continuous wall self-supporting is used.

[0003]

The above-mentioned conventional techniques have the following problems. Firstly, if a ground anchor is used for a soil retaining wall with a high wall in a place where the construction conditions are severe, a temporary scaffold for installing a boring machine for drilling will be required continuously, resulting in a longer construction period. With
The construction cost is also high. Secondly, in places where construction conditions are severe, such as close construction, current traffic, and the effect on the surrounding environment, there was no place to install the temporary scaffolding itself, making it impossible to construct the earth retaining wall itself. The present invention is made in view of the above problems, and provides a method of constructing an earth retaining wall that enables construction under severe construction conditions such as no installation site for temporary scaffolding and that can reduce construction period and construction cost. The purpose is to do.

[0004]

In order to solve the above-mentioned problems, the invention of claim 1 takes a reaction force from an existing pile or a sheet pile (for example, sheet pile 2) as shown in FIGS. A new pile or sheet pile (for example, sheet pile 2 etc.) is press-fitted, and it moves on the existing pile or sheet pile (for example sheet pile 2 etc.) and is newly added to a position adjacent to the existing pile or sheet pile (for example sheet pile 2). While pressing the piles or sheet piles into the
A method for constructing an earth retaining wall 50 using a self-propelled press-fitting construction machine 1 capable of changing the press-fitting angle of a new pile or sheet pile,
A new pile or sheet pile (for example, sheet pile 2) while taking a reaction force from the existing pile or sheet pile (for example, sheet pile 2) to the sheet pile wall 2a used as the earth retaining wall 50 by the self-propelled press-fitting construction machine 1.
A slanted pile 3 that is constructed by press-fitting and that suppresses the displacement of the sheet pile wall 2a while taking a reaction force from the existing pile or sheet pile (for example, sheet pile 2) by the self-propelled press-fitting construction machine 1. The slanting pile 3 and the sheet pile wall 2a are joined by press-fitting obliquely into the sheet pile wall 2a.

According to the method of constructing the earth retaining wall according to the first aspect of the present invention, by using the self-propelled press-fitting construction machine 1, the pile sheet wall 2a is newly piled while taking a reaction force from the existing pile or the pile sheet 2. Pressing the sheet pile 2 into place, the existing pile or sheet pile 2
The earth retaining wall 50 can be constructed by press-fitting the slant pile 3 that suppresses the displacement of the sheet pile wall 2a while taking a reaction force from the slant to the sheet pile wall 2a and joining the slant pile 3 and the sheet pile wall 2a. Thereby, while constructing the sheet pile wall 2a, it is possible to efficiently construct the earth retaining wall 50 capable of suppressing the displacement of the sheet pile wall 2a by the oblique pile 3. That is, the sheet pile 2 that constitutes the earth retaining wall 50 and the earth retaining wall 50
The space required for the machine can be suppressed by also using the mechanism for press-fitting the oblique pile 3 that reinforces the ground anchor, and the ground anchor (oblique pile 3) is provided even in a narrow place where there is no temporary scaffolding installation place. It is possible to shorten the construction period for constructing the earth retaining wall 50 and reduce the construction cost.

The invention of claim 2 is, for example, as shown in FIGS. 3 and 4, in the method of constructing the earth retaining wall according to claim 1, the self-propelled press-fitting construction is performed during the construction of the sheet pile wall 2a. After the press-fitting of the plurality of sheet piles 2 by the machine 1, the press-fitting of the diagonal piles 3 is repeated, so that the plurality of the diagonal piles 3 are press-fitting obliquely at intervals.

According to the second aspect of the present invention, during the construction of the sheet pile wall 2a, the self-propelled press-fitting construction machine 1 presses a plurality of sheet piles 2 and then the diagonal piles 3 are diagonally press-fitted. The press-fitting of the plurality of sheet piles 2 and the work of press-fitting the plurality of oblique piles 3 at intervals can be continuously performed. Since the self-propelled press-fitting construction machine 1 has a feature that it is difficult to move backward, if the machine constructs the sheet pile 2 and the diagonal pile 3 separately, in order to press-fit the diagonal pile 3 after the construction of the sheet pile wall 2a, It is necessary to arrange the machine again or to use a plurality of machines, but by performing the work of inserting the plurality of sheet piles 2 and the plurality of oblique piles 3 obliquely by the same machine in succession, one self machine is installed. The earth retaining wall 50 can be efficiently constructed by the traveling press-fitting construction machine 1.

According to the third aspect of the present invention, for example, as shown in FIG. 4, the oblique pile 3 is a rotary press-fitting pile (for example, a rotary press-fitting steel pipe pile 31) having a screw 3a having a spiral shape at least at its tip end. It is characterized in that the rotary press-fitting pile (for example, the rotary press-fitting steel pipe pile 31) is press-fitted while rotating.

According to the third aspect of the present invention, the oblique pile is the rotary press-fitting pile 31 having the spiral screw 3a at least at its tip portion, and the rotary press-fitting pile 31 is press-fitted while being rotated. The rotation press-fitting pile 31 can be smoothly press-fitted while rotating in accordance with. Also, for example, earth pressure is applied to the sheet pile wall 2a in the horizontal direction (arrow F in FIG. 4),
A force that pulls out the oblique pile 3 is applied. With respect to such a force, in the normal oblique pile 3, only the resistance due to the friction between the oblique pile 3 and the earth and sand is used. However, by using the rotary press-fit pile 31 including the screw 3a, the friction between the rotary press-fit pile 31 and the earth and sand. In addition to the resistance due to, the load of earth and sand on the screw 3a is applied. Furthermore, when the screw 3a exerts a force to lift the earth and sand, in the support layer P, due to the stress against the shearing force generated between the earth and sand to which the force to be lifted by the screw 3a acts and the surrounding earth and sand. High pullout resistance can be obtained, and it is possible to cope with back soil pressure.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A method of constructing an earth retaining wall according to the present invention will be described below with reference to the drawings. First, the self-propelled press-fitting construction machine 1 used for the method of constructing the earth retaining wall in the present embodiment will be described. FIG. 1 is a diagram showing a main part of a self-propelled press-fitting construction machine 1 according to the present embodiment, and FIG. 2A shows an arrow A of the self-propelled press-fitting construction machine of FIG.
It is the side view seen from the direction, and FIG.2 (b) is the side view which looked at the self-propelled press-fitting construction machine of FIG. 1 from the arrow B direction. The self-propelled press-fitting construction machine 1 has an existing pile gripping portion 7 that detachably grips the previously pressed press-fitting sheet pile 2 (pile) and takes a reaction force from the sheet pile 2.
And a chuck part 8 for removably gripping the sheet pile 2 to be press-fitted, and for vertically press-fitting the grasped sheet pile 2, and an existing pile gripping part 7, ... And a tilted mast portion 5 that can be tilted diagonally,
The existing pile holding portion 7 and a mast portion 9 that is pivotally provided so as to be able to change its direction to the left and the right constitute a main portion.

The existing pile gripping portion 7 includes the existing pile gripping portion 7
On the other hand, there is provided a slide portion 72 that can be moved back and forth (in the direction of arrow C in FIG. 1), and the mast portion 9 is pivotable on the slide portion 72 so as to turn left and right. It is installed. Further, the lower part of the existing pile gripping portion 7 is provided with clamps 71, ... Which are fixed to the cylindrical sheet pile 2 (steel pipe sheet pile) previously press-fitted by pushing open from the inside thereof.

A swivel seat 6 is provided on the front surface of the mast portion 9, and the slanted mast portion 5 is mounted on the swivel seat 6.
However, it is attached so as to be rotatable so as to be inclined to the left and right. Further, the mast portion 9 and the inclined mast portion 5
Hydraulic cylinders 10, 10 are attached to both sides of the swivel seat 6 as drive means for swiveling the inclined mast portion 5 with respect to the mast portion 9.

The chuck portion 8 is provided with a grip portion 81 for gripping the sheet pile 2 or the inclined pile 3, is vertically movably attached to the front surface of the inclined mast portion 5, and is vertically moved by a hydraulic cylinder 82 provided on the upper portion of the chuck portion 8. It is designed to be driven up and down.

Incidentally, the main difference between the conventional self-propelled press-fitting construction machine and the self-propelled press-fitting construction machine of the present embodiment is that a chuck part that can move up and down is attached to the front surface of the mast in the past. However, the self-propelled press-fitting construction machine 1 of the present embodiment is provided with the inclined mast portion 5 between the mast portion 9 and the chuck portion 8 so as to be rotatable with respect to the mast portion 9. ing. Therefore, when the inclined mast portion 5 is inclined, the chuck portion 8 is inclined with respect to the mast portion 9 and the chuck portion 8 can move up and down, so that the vertical piles or the sheet piles 2 and the inclined piles 3 cannot be press-fitted. This is a possible point.

Next, a method of constructing the earth retaining wall in the present embodiment will be described. Using the method of constructing the earth retaining wall according to the present embodiment, for example, as shown in FIG. 3, a plurality of sheet piles 2 (pile) are sequentially press-fitted in a state in which they are engaged with each other in the locking portion 20, and this row On one surface of a sheet pile wall 2a formed by a plurality of sheet piles 2, ...
The diagonal piles 3 are arranged at a predetermined interval from the position adjacent to the upper part of the sheet pile 2,
The work of press-fitting is performed while inclining with respect to the longitudinal direction of the sheet pile 2.

When press-fitting the sheet pile 2, the inclined mast portion 5
In the vertical state, the sheet pile 2 is grasped by the grasping portion 81 as in the conventional case, and the chuck portion 8 grasping the sheet pile 2 by the hydraulic cylinder 82 of the chuck portion 8 is lowered to lower the sheet pile 2 to the ground. Press into.

On the other hand, when press-fitting the oblique pile 3, the existing sheet piles 2, ... Are grasped by the clamps 71 ,.
With the chuck 8 raised, the hydraulic cylinders 10, 1
When 0 moves in the opposite direction, the swivel seat 6 connected to the hydraulic cylinders 10, 10 swivels, and the tilted mast portion 5 engaged with the swivel seat 6 tilts. Then, the hydraulic cylinder 82 provided in the chuck portion 8 is obliquely lowered in the ground direction, so that the chuck portion 8 holding the oblique pile 3 by the grip portion 81 is lowered, and the oblique pile 3 is inclined with respect to the sheet pile 2. Is pressed into the ground.

With the oblique pile 3 being press-fitted,
After fastening the existing sheet pile 2 and the slant pile 3 with the connecting member 32, concrete D is poured and solidified, and the slant pile 3 and the pile wall 2 are fastened.
Join a.

It should be noted that the self-propelled press-fitting construction machine does not have the inclined mast portion 5 but takes a reaction force from the existing piles to press the piles substantially vertically and is capable of self-propelled on the existing piles. The thing is known, and this self-propelled press-fitting construction machine 1 is self-propelled in the same manner as this example.

By rotating the grip portion 81 with respect to the main body of the chuck portion 8, it is possible to press-fit the gripped slant pile 3 while rotating it. With such a configuration, for example, as shown in FIG. 4, a rotary press-fitted steel pipe pile 31 (rotary press-fitted pile) having a spiral screw 3a at the tip thereof.
Can be used. Such a rotary press-fit steel pipe pile 31
If the press-fitting is performed while rotating according to the direction of the screw 3a, the rotary press-fitting steel pipe pile 31 can be smoothly press-fitted. Further, the sheet pile wall 2a has a horizontal direction (arrow F direction in FIG. 4).
Earth pressure is applied to the so that the oblique pile 3 is pulled out. With respect to such a force, in the normal oblique pile 3, only the resistance due to the friction between the oblique pile 3 and the earth and sand is used.
By using the rotary press-fitting steel pipe pile 31 having the above, the load of earth and sand on the screw 3a is applied. Furthermore, when a force such as lifting the earth and sand is applied by the screw 3a, in the support layer P, due to the stress against the shearing force generated between the earth and sand to which the force that the screw 3a lifts act and the surrounding earth and sand, High pull-out resistance can be obtained, and back soil pressure can be dealt with.

According to the method of constructing the earth retaining wall in the present embodiment, the sheet pile 2 which has been previously press-fitted (the existing sheet pile) is moved and the sheet pile 2 is newly press-fitted in a position adjacent to the existing sheet pile 2. You can Further, the inclined pile 3 can be press-fitted into at least one of the front portion and the rear portion of the sheet pile wall 2a formed by the sheet piles 2, ..., A mechanism for press-fitting the pile in the vertical direction and the inclination direction is provided. Can be combined. This allows
While constructing the sheet pile wall 2a, the earth retaining wall 50 capable of suppressing the displacement of the sheet pile wall 2a can be efficiently constructed by the oblique pile 3 that is press-fitted obliquely, and is stable even if the height is high. The work of constructing the earth retaining wall 50 standing upright becomes easy. Further, even in a narrow place where there is no temporary scaffolding installation place, the earth retaining wall 50 having the ground anchor (oblique pile 3) can be constructed, and the construction period can be shortened and the construction cost can be suppressed. .

Further, since the inclined mast portion 5 is connected to the mast portion 9 through the swivel seat 6 provided on the front surface of the mast portion 9, the swiveling operation of the inclined mast portion 5 is prevented from occurring in the mast portion 9 and the mast portion 9. There is no restriction of the existing pile holding part 7. Further, since the hydraulic cylinder 10 is provided outside the mast portion 9, there is no restriction on the size of the hydraulic cylinder 10 by the mast portion 9 and the inclined mast portion 5, and it becomes possible to provide a large driving force. The inclination angle of 5 can be increased, and the inclined state of the inclined mast portion 5 can be maintained.

In the construction of the earth retaining wall 50, since the sheet pile 2 and the inclined pile 3 are press-fitted and installed, vibration and noise are suppressed and construction space and construction are reduced as compared with the construction by the hammering method or the hollow excavation method. The cost can be reduced.

The earth retaining wall 50 according to the present embodiment.
In the construction method, the existing sheet pile 2 and the diagonal pile 3 are connected to each other by the connecting member 3
After fastening with 2, the sheet pile wall 2a and the stake pile 3 are joined by pouring and hardening the concrete D, but the present invention is not limited to this. The point is that the sheet pile wall 2a and the stake pile 3 are joined together. Any joining method can be used as long as they can be joined.

Further, the inclined pile 3 is arranged on the side to be pulled out with respect to the earth pressure F from the side, but it is not limited to this, and it is arranged on the side to be compressed, for example. Good. Further, as a procedure of construction, the sheet pile 2 may be continuously press-fitted to complete the sheet pile wall 2a, and then the oblique pile 3 may be press-fitted.

The earth retaining wall 50 according to the present embodiment.
In the construction method, the sheet pile 2 is press-fitted in the vertical direction, but a pile may be used as long as the earth retaining wall can be constructed.

[0027]

According to the construction method of the earth retaining wall of the present invention,
Using the self-propelled press-fitting construction machine, press-fit the piles or sheet piles in sequence, and press diagonally press the diagonal piles against the sheet pile wall to suppress the displacement of the sheet pile wall while taking the reaction force from the existing piles or sheet piles. The retaining wall can be easily constructed. Further, it is possible to move on the existing piles or sheet piles and newly press-fit the piles or sheet piles at positions adjacent to the existing piles or sheet piles. Therefore, the pile or the sheet pile that constitutes the earth retaining wall and the diagonal pile (anchor) that reinforces the sheet pile wall.
Since a self-propelled press-fitting construction machine that can press-fit and is self-propelled is used, it is not necessary to install a temporary scaffold. This eliminates the need to install temporary scaffolds, which not only contributes to the reduction of construction period and cost, but also in a narrow space where there is no temporary scaffolding installation site, etc. Can be constructed.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an embodiment of a self-propelled press-fitting construction machine used in a method of constructing an earth retaining wall according to the present invention.

2 is a side view of the self-propelled press-fitting construction machine shown in FIG. 1, and FIG. 2 (a) is a side view seen from the direction of arrow A in FIG.
(B) is a side view seen from the arrow B direction in FIG. 1.

FIG. 3 is a diagram showing an example in which a pile or a sheet pile that constitutes a sheet pile wall and a diagonal pile that suppresses the displacement of the sheet pile wall are press-fitted by using the method for constructing an earth retaining wall according to the present invention. ) Is a plan view thereof, and (b) is a side view thereof.

FIG. 4 is an example in which a pile or a sheet pile that constitutes a sheet pile wall and a rotary press-fitted steel pipe pile as a diagonal pile that suppresses the displacement of the sheet pile wall are press-fitted by using the method for constructing the earth retaining wall according to the present invention. It is a figure which shows, (a) is the top view, (b) is the side view.

[Explanation of symbols]

1 Self-propelled press-fitting construction machine 2 sheet piles 3 oblique pile 3a screw 2a sheet pile wall 31 Rotary press-fit steel pipe pile (rotary press-fit pile) 50 earth retaining wall

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuo Minami             3948 Nunoshida, Kochi City, Kochi Prefecture Co., Ltd.             Giken Factory (72) Inventor Hiroyuki Yasuoka             1-38 Ariake, Koto-ku, Tokyo Co., Ltd.             Giken Factory (72) Inventor Ikoma Kimura             1-38 Ariake, Koto-ku, Tokyo Co., Ltd.             Giken Factory (72) Inventor Hisao Yamashita             2-6-3 Otemachi, Chiyoda-ku, Tokyo New             Nippon Steel Corporation (72) Inventor Kenji Saikai             20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares             Company Technology Development Division (72) Inventor Takashi Hirata             20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares             Company Technology Development Division (72) Inventor Yu Hirashima             20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares             Company Technology Development Division F term (reference) 2D049 FB03 FB14 FC03 FE06                 2D050 AA08 CB22 CB23 EE04 EE13

Claims (3)

[Claims] 1. A pile or sheet pile is newly press-fitted by taking a reaction force from the existing pile or sheet pile and moving on the existing pile or sheet pile to newly place a pile or sheet pile at a position adjacent to the existing pile or sheet pile. It is a method of constructing an earth retaining wall using a self-propelled press-fitting construction machine capable of changing the press-fitting angle of a new pile or sheet pile while sequentially press-fitting the piles. The sheet pile wall will be constructed by press-fitting new piles or sheet piles while taking reaction force from the existing piles or sheet piles, and while taking reaction force from the existing piles or sheet piles by the self-propelled press-fitting construction machine. A method for constructing an earth retaining wall, comprising press-fitting obliquely piles that suppress the displacement of the sheet pile wall into the sheet pile wall obliquely and joining the diagonal piles and the sheet pile wall. 2. During construction of the sheet pile wall, after press-fitting a plurality of the sheet piles by the self-propelled press-fitting construction machine,
By repeating press-fitting the diagonal pile diagonally,
The method for constructing an earth retaining wall according to claim 1, wherein a plurality of the oblique piles are press-fitted obliquely at intervals. 3. The method for constructing an earth retaining wall, characterized in that the oblique pile is a rotary press-fit pile having a spiral screw at least at its tip, and the rotary press-fit pile is press-fitted while rotating.