JP2669498B2 - Method of driving structure and structure for driving - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a structure used for driving a structure by a pile driver or the like, and a structure for driving.

[0002]

2. Description of the Related Art Generally, hitting, vibration and press-fitting are known as methods for driving structures such as piles and sheet piles. The present applicant has already proposed a pile driving machine (press-fitting / pulling-out machine) that takes in a reaction force from a previously driven structure and press-fits the structure with hydraulic pressure. The pile driving by the press-in / pull-out machine described above, unlike the pile driving by impact or vibration, had extremely low noise and vibration and hardly caused pollution.

As shown in FIG. 10, the press-fitting / pulling-out machine 1 is provided with a clamp part 2 for sandwiching a structure already driven therein, and a power device (not shown) such as a hydraulic cylinder arranged on the clamp part 2. ), A main body 3 having a control device (not shown) and the like, and an elevating unit 4 that can move up and down while holding a structure on the front surface of the main body 3.

By sandwiching the structure already driven, the clamp part 2 can take a reaction force from the structure already driven when newly driving the structure or pulling out the structure. It has become.

The elevating unit 4 moves up and down while gripping a structure such as a pile or a sheet pile, thereby pressing a structure such as a pile or a sheet pile into the ground e and removing the structure from the ground e of the structure. It can be pulled out. As described above, when the structure is pressed into the ground e and pulled out from the ground e, a reaction force is taken from the already driven structure.

The elevating unit 4 is capable of moving back and forth with respect to the main unit 3, so that several structures can be driven in a row while the clamp unit 2 is fixed. I have. Further, the elevating unit 4 can rotate the grasped structure around the vertical direction as an axis, and can rotate the entire elevating unit 4,
For example, when the sheet piles are driven into a rectangular frame shape, the sheet piles can be driven in a direction perpendicular to the row of sheet piles with the clamp portions 2 fixed to the row of sheet piles.

There are various shapes of piles and sheet piles, but conventionally, those made of H-shaped steel are known. The H-shaped steel sheet pile 5 is formed of a plate-like member extending in the vertical direction, and has a relatively small tip resistance because the tip surface area is relatively small.

Therefore, except when the ground e is particularly hard,
The H-shaped steel sheet pile 5 having the H-shaped tip surface was press-fitted by the press-fitting / pulling machine 1 as it was. When the ground e is extremely hard, the jet method using jet jet water is also used to eject the jet jet water from the lower end of the H-shaped steel sheet pile 5 to jet the ground e into which the H-shaped steel sheet pile 5 is driven. Excavation and agitation were performed by the jet water, and the H-shaped sheet pile 5 was press-fitted.

[0009]

If the ground e is made of a small stone such as earth and sand, since the tip resistance of the H-shaped steel sheet pile 5 is relatively small, the press-in / pull-out machine 1 can be used.
There is no particular problem in press-fitting the H-shaped sheet pile 5 by the method described above. However, when the ground e includes a relatively large stone S, for example, as shown in FIG. If there is a large stone S directly below the H-shaped steel sheet pile 5 to be driven during continuous driving, H
After the tip of the shaped steel sheet pile 5 hits the stone S, the stone S is pressed together with the H shaped steel sheet pile 5. In this case, while the tip resistance of the H-shaped steel sheet pile 5 is relatively small, a stone S having a large tip resistance must be pressed in, and a large pressure is required.

When the above jet method is also used, the tip resistance at the time of press-fitting is basically small, but when earth and sand are excavated by jet jet water, lightweight earth and sand and pebbles are It will be in a state of being stirred in water,
Heavy stones S may accumulate at the bottom of the portion excavated in the jet water.

Further, the jet jet water also excavates the periphery of the portion where the H-shaped steel sheet pile 5 is driven, but when a heavy stone S is present in the peripheral portion, this stone S is excavated. There is a possibility of rolling down to the bottom of the portion excavated in the jet jet water, that is, below the H-shaped steel sheet pile 5 to be driven. Therefore, when the jet water is used in the ground e including a lot of relatively large stones S, there is a possibility that the stones S collect on the portion where the H-shaped steel sheet pile 5 is driven. There is a possibility that driving the shaped steel sheet pile 5 may be difficult.

The present invention has been made in view of the above circumstances, and prevents a stone in the ground from hindering the driving of a structure formed of a plate-like member extending along a vertical direction, such as an H-section steel. It is an object of the present invention to provide a method and a structure for driving a structure which can be driven.

[0013]

According to a first aspect of the present invention, there is provided a method for driving a structure, wherein a structure formed of a plate-like member extending in a vertical direction is driven into the ground at the lower end of the structure. This is a method of driving a structure into which the above-mentioned structure is driven into the ground after the tip with the sloped bottom surface is provided.
When the above structures are to be driven continuously in a row
, The lower surface of the above-mentioned tip part of the structure side already driven
The side edge is low and the opposite side edge is high.
This is the means for solving the above problems.

Further, for driving according to claim 2 of the present invention
The structure consists of a plate-shaped member along the vertical direction, and
The main body that is continuously driven in a row and the lower end of the main body
And a lower surface of the tip portion, which is provided with
However, the side edge of the body that has already been driven in is low, and the opposite side
The side edge of the slope is a high slope.
It was a step.

[0015]

According to the structure of claim 1, the structure
When you hit, the tip of the structure hit a stone
Also, by driving the structure as it is, the above-mentioned tip
The slope of the lower surface has deviated the above stone from the driving direction of the structure
Will push it into position.

Therefore, the ground containing a lot of relatively large stones
It is also possible to drive the above structure against it.

Further , when the lower surface of the tip portion is an inclined surface,
When driving the above structure, place the structure on the slope of the tip.
A bending force acts in the direction opposite to the facing direction.
Also, when a stone hits the slope of the above-mentioned tip,
Bend the structure in the direction opposite to the side facing the slope.
Big force will work.

However, the above structures are continuously struck in a row.
And the bottom surface of the tip is already
The side edge on the side of the structure that has been inserted is low, and the side edge on the opposite side
If the part has a high slope, the end of the structure to be driven
A force that bends the end to the already driven structure side works
become.

In this case, the structure to be driven is already
Since it will be pressed down by the driven structure,
Due to the slope of the tip, the driving direction of the structure
I won't. In addition, stones on the slope of the tip above
Even if it hits, it will still be pressed against the already driven structure.
Since it has been obtained, the driving direction of the structure is bent
There is no end.

According to the above-mentioned structure of claim 2,
Consisting of plate-shaped members along the vertical direction and continuous in a row
And a main body to be driven in and a lower end portion of the main body,
And driving with a tip having a slope formed on the lower surface
In the construction structure, the lower surface of the tip is already driven
The slanted side edge of the main body is low and the opposite side edge is high.
Since it is a surface, the structure according to claim 1 is provided.
The same effect can be achieved.

[0021]

【Example】 Below, the driving of the structure of one embodiment of the present invention
The polishing method and the driving structure will be described.

In this embodiment, the structure of the present invention is used.
Fig. 1 shows the method of driving the structure and the structure for driving.
H-shaped steel sheet pile (main body of structure, driving structure) 5
The press-fitting / pulling-out machine described in the conventional example (see FIGS. 10 and 1).
It is applied when press fitting by 1)
You.

Further, press-fitting / pulling used in this embodiment
The removing machine 1 has the same configuration as that described in the above-mentioned conventional example.
And its description is omitted.

Here, before describing the method of driving the structure of this embodiment, the structure for driving will be described. FIG. 1 shows a striking structure of this embodiment, and as shown in FIG.
It comprises a shaped steel sheet pile 5 and a tip portion 6 provided at the lower end portion of the H shaped steel sheet pile 5.

As is well known, the H-shaped steel sheet pile 5 basically has a web plate 5 which is a plate-like member along the vertical direction.
a and flange plates 5b and 5b joined to the right and left side edges of the web plate 5a at right angles to the web plate 5a, respectively. That is, H
The steel sheet pile 5 is composed of three plate-like members extending in the vertical direction. In this embodiment, the flange plates 5b of the H-shaped steel sheet pile 5 are formed at their lower ends with bolt holes 5c for fastening the tip portions 6.

FIG. 2 shows the above-mentioned tip portion 6,
FIG. 2A is a perspective view of the distal end portion 6, and FIG.
2C is a left side view of the tip portion 6, FIG.
2D is a front view of the distal end portion 6, and FIG. 2E is a bottom view of the distal end portion 6. Then, as shown in FIGS. 1 and 2, the tip portion 6 has a horizontal upper surface 6a connected to the H-shaped steel sheet pile 5.
And a vertical surface 6b on the back side perpendicular to the upper surface 6a,
It is a tetrahedron composed of a front slope 6c, a left slope 6d, and a right slope 6e.

As shown in FIG. 1, connection pieces 7 for connecting to the H-shaped steel sheet pile 5 are provided on the upper surface 6a of the tip end in correspondence with the positions of the bolt holes 5c of the H-shaped steel sheet pile 5. Has been established. Each of the connection pieces 7 is formed with one screw hole 7a that communicates with the bolt hole 5c of the H-shaped steel sheet pile 5. And H type steel sheet pile 5 and tip 6
Means that the bolt holes 5c and the screw holes 7a can communicate with each other and can be fastened by bolts 8 (only one is shown in FIG. 1).

The vertical surface 6b of the tip portion is shown in FIGS.
As shown in (1), when the H-shaped sheet piles 5 are continuously driven in a row, the side faces of the H-shaped sheet piles 5 (side edges of the flange plates 5b, 5b) are directed toward the already driven H-shaped sheet piles 5 side.
It is the portion that is brought into contact with the. The front side slope 6
As shown in FIGS. 3 and 4, c is a position where the stone S deviates from the driving direction of the H-shaped steel sheet pile 5 when the stone S hits the tip portion 6 by driving the H-shaped steel sheet pile 5. It was formed in order to exclude it.

As shown in FIGS. 3 and 4, the front side slope 6c has a lower side edge on the side of the H-shaped sheet pile 5 already driven and a higher side on the opposite side. Therefore, when the H-shaped steel sheet pile 5 to which the tip portion 6 is attached is driven, especially when the tip portion hits the stone S,
The front slope 6c exerts a force to bend the H-shaped steel sheet pile 5 to be driven toward the already-H-shaped steel sheet pile 5 side.

However, the side surface of the H-shaped steel sheet pile 5 to be driven is in contact with the side surface of the already driven H-shaped steel sheet pile 5 and the vertical surface 6b is in contact with the already driven H-shaped steel sheet pile 5. Since they are in contact with each other, even if the bending force to the H-shaped steel sheet pile 5 side already driven into the H-shaped steel sheet pile 5 to be driven by the front slope 6c acts, the H-shaped steel sheet pile 5 has already been pressed down. In this state, the driving direction of the H-shaped sheet pile 5 to be driven does not bend.

The left slope 6d and the right slope 6e are formed to make the tip 6 pointed downward, and are provided to reduce the tip resistance of the tip 6. . The left slope 6d and the right slope 6e have the same shape and the same slope, and the left slope 6d and the right slope 6e do not change the driving direction of the H-shaped steel sheet pile 5. It has become.

Next, a method for driving a driving structure having the above-mentioned H-shaped steel sheet pile 5 and the tip 6 will be described. First, when driving the H-shaped steel sheet pile 5, as shown in FIG. 1, the tip portion 6 is fastened to the lower end of the H-shaped steel sheet pile 5 with a bolt 8.

Next, as shown in FIG. 3, a driving structure comprising an H-shaped sheet pile 5 and a tip 6 is continuously driven in a line by the press-in / pull-out machine 1 (FIGS. 10 and 11). At this time, in the H-shaped steel sheet pile 5, a force acts so as to bend to the H-shaped steel sheet pile 5 side already driven as described above due to the front side inclined surface 6c of the tip portion 6, but the H-shaped steel sheet pile 5 already pressed. Since it is pressed by the shape steel sheet pile 5, the driving direction does not bend.

When the tip 6 attached to the lower end of the H-shaped steel sheet pile 5 hits a large stone S, H
By further press-fitting the shaped steel sheet pile 5, as shown in FIG. 4, the front side sloped surface 6c of the tip portion 6 removes the stone S from the H-shaped steel sheet pile 5.
It will be pushed out of the driving direction.
Therefore, the lower end of the H-shaped steel sheet pile 5 abuts against the large stone S, so that the pressure required for press-fitting the H-shaped steel sheet pile 5 can be prevented from greatly increasing, and the ground having a relatively large stone S can be prevented. Also in this case, the H-shaped steel sheet pile 5 can be press-fitted.

As described above, according to the structure driving method and the driving structure of this embodiment, the H-shaped sheet pile 5 can be driven even in the ground having a relatively large stone S. In addition, in the said Example, by attaching the front-end | tip part 6 to the H-shaped steel sheet pile 5 with a comparatively small front-end area, a front-end area will increase and when comparing the front-end | tip resistance in the state without the stone S, , The tip resistance may be greater when the tip portion 6 is attached than when only the H-type steel sheet pile 5 is attached.

In such a case, the press-fitting / pulling-out machine 1
When the H-shaped steel sheet pile 5 is driven by using the jetting method, the pressure for press-fitting the driving structure can be reduced by using the jet construction method using jet water. When the jet method is used, the jet method can be easily adapted by providing the jet port 9 for jet water at the tip end portion 6 as shown in FIG.

In the above embodiment, the H-shaped sheet pile 5 is used as the main body of the driving structure. However, the shape of the main body of the driving structure is not limited to the H-shape. The main body of the driving structure may be a steel pipe, for example. Further, the application of the driving structure is not limited to the sheet pile, but may be a pile or another structure.

Although the press-fitting / pulling-out machine 1 is used to drive the striking structure in the above embodiment, any device may be used as long as it is a device for striking a structure such as a pile or a sheet pile. . However, a pile driving machine that drives a pile or a sheet pile by impact or vibration causes pollution due to noise, vibration, or the like. Therefore, it is preferable to use the press-in / pull-out machine 1.

The shape of the tip 6 is not necessarily limited to the shape shown in FIG. Basically, since the lower surface of the tip portion 6 is a slope, when the stone S collides with the lower surface of the tip portion 6, the stone S is removed to a position deviating from the driving direction of the H-shaped sheet pile 5. What is necessary is just to be the shape which can do. Therefore, the shape of the tip may be, for example, the tip 10 shown in FIG. 6 or the tip 11 shown in FIG. 7, or may be another shape.

In the tip portion 10 shown in FIG. 6, the front side slope 6c of the tip portion 6 is eliminated and the left and right slopes 10 are removed.
a and 10b are directly abutted, and
The left and right slopes 10a, 10b are not only inclined to the left and right, but the already driven H like the front side slope 6c.
The side edge of the shape steel sheet pile 5 side is low, and the opposite side is high. In the ridge portion where the left and right slopes 10a and 10b are abutted, the H-shaped steel sheet pile 5 already driven in is low, and the opposite side is high.

Therefore, when the tip 10 hits the stone S, basically the stone S is disengaged from the driving direction of the H-shaped steel sheet pile 5 by the abutted ridge portions of the left and right slopes 10a, 10b. Will be extruded.
Also, the left and right slopes 10a, 10b have already been driven into H
Since the side edge of the shape steel sheet pile 5 side is low and the other side is inclined so as to be high, the H type steel sheet pile 5 to be driven in the same way as the tip portion 6 is pushed to the side of the H type steel sheet pile 5 already driven. However, it is held by the driven H-shaped sheet pile 5.

Further, in the tip portion 11 shown in FIG. 7,
It has a shape in which left and right inclined surfaces 11a and 11b that are inclined left and right are formed. Since the tip 11 has only the left and right slopes 11a and 11b, when the tip 11 hits the stone S, the stone S is pushed to the right or left of the H-shaped sheet pile 5.

Since the tip portion 11 is in a state of being balanced left and right without the stone S,
The H-shaped steel sheet pile 5 will be driven straight,
When the tip 11 hits the stone S, the driving direction of the H-shaped steel sheet pile 5 may be bent depending on the size of the stone S. Therefore, when the H-shaped sheet pile 5 is driven continuously in a row, the tip portion 11 shown in FIG.
Can be suitably used.

In the above embodiment, the tip 6 is fastened to the H-shaped steel sheet pile 5 with the bolt 8.
The joining method between the H-shaped steel sheet pile 5 and the above-mentioned tip portions 6, 10, 11 is not limited to the fastening using the bolt 8, but may be, for example, welding.

In each of the above-mentioned tip portions 6, 10 and 11, the tip portions have a three-dimensional shape. However, as shown in FIGS. 8 and 9, the tip portions 12 and 13 are formed from plate bodies. It may be done. The tip 12 shown in FIG. 8 is formed by welding the left and right plate bodies 12a and 12b after the lower end of the H-shaped steel sheet pile 5 is cut diagonally left and right, and the tip 1 shown in FIG.
It is formed in the same shape as 0. Therefore, it operates substantially in the same manner as the tip portion 10.

The tip portion 13 shown in FIG. 9 cuts the lower end of the H-shaped sheet pile 5 obliquely so that the already driven H-shaped sheet pile 5 side is low and the opposite side is high. The body 13a is welded. Therefore, the plate 13a of the distal end portion 13 shown in FIG.
It works similarly to c.

Further, each of the above-mentioned tip portions 10, 11, 12,
In 13 as well, the jet port 9 for jet jet water such as the tip portion 6 shown in FIG.
May be formed on each of the tip portions 10, 11, 12, and 13.

[0048]

As described in detail above, according to the method for driving a structure according to the first aspect, even if the tip of the structure strikes a stone when the structure is driven,
By driving the structure as it is, the slope of the lower surface of the tip portion can push the stones to a position deviated from the driving direction of the structure. Therefore, the above-mentioned structure can be driven into the ground containing a lot of relatively large stones.

If an inclined surface is provided on the lower surface of the tip,
In that case, when a stone hits the slope of the tip , a force to bend the structure in the direction opposite to the direction of the slope will work, but the structures are continuously driven in a row. In addition, the lower surface of the front end portion is driven into the already driven structure side by making the side edge of the already driven structure side low and the opposite side edge of the lower surface a high slope. The force that bends the tip of the structure to be worked will be exerted.

In this case, the structure to be driven in is already
Since it will be pressed down by the driven structure,
Due to the slope of the tip, the driving direction of the structure
I won't. Therefore, if the tip hits the stone
However, it is possible to drive the structure straight.

According to the above-mentioned structure of claim 2,
Consisting of plate-shaped members along the vertical direction and continuous in a row
And a main body to be driven in and a lower end portion of the main body,
And driving with a tip having a slope formed on the lower surface
In the construction structure, the lower surface of the tip is already driven
The slanted side edge of the main body is low and the opposite side edge is high.
Since it is a surface, the structure according to claim 1 is provided.
The same excellent effect can be achieved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a driving structure according to an embodiment of the present invention.

FIG. 2 is a drawing showing a tip end portion of the driving structure of the above embodiment.

FIG. 3 is a side view showing a method for driving a structure according to an embodiment of the present invention.

FIG. 4 is a side view showing a method for driving a structure according to the above embodiment.

FIG. 5 is a perspective view showing a tip portion different from the tip portion of the above embodiment.

FIG. 6 is a perspective view showing a tip portion different from the tip portion of the above embodiment.

FIG. 7 is a perspective view showing a tip portion different from the tip portion of the above embodiment.

FIG. 8 is a view showing a tip portion different from the tip portion of the above-described embodiment.

FIG. 9 is a view showing a tip portion different from the tip portion of the above-described embodiment.

FIG. 10 is a side view showing the conventional method for driving a structure.

FIG. 11 is a side view showing a conventional method for driving a structure.

[Explanation of symbols]

 5 H-shaped steel sheet pile (structure, main body of structure) 5a Web plate (plate-like member) 5b Flange plate (plate-like member) 6 Tip 6c Front slope 6d Left slope 6e Right slope 10 Tip 10a Left slope 10b Right Slope 11 Tip part 11a Left slope 11b Right slope 12 Tip part 13 Tip part

Claims (2)

(57) [Claims] 1. When driving a structure composed of a plate-shaped member along a vertical direction into the ground, a lower end portion of the structure is provided with a tip end portion having an inclined lower surface, and then the structure is grounded. A method of driving a structure to be driven, wherein when the above structures are driven continuously in a line,
The lower surface of the tip is the side edge of the structure that has already been driven in.
Is low and the opposite side is a high slope
A method for driving a structure characterized by: 2. A plate-shaped member extending in the vertical direction,
One, the main body that is continuously driven in a row, and the lower end of the main body
And a tip portion provided on the
The lower surface has a low side edge on the side of the body that has already been punched in,
The striking feature is that the opposite side edge has a high slope.
Structure for insertion.