JP2001115447A - Steel pipe pile, and construction method for continuous wall of steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel pipe pile which can easily and surely realize the water-sealing effect to a continuous wall to be executed underground, and can be pressed into the ground in a rotating manner, and a construction method for a continuous wall of steel pipe piles. SOLUTION: Steel pipe piles 1 and 10 construct a continuous wall by joining steel pipes 2 and 2 adjacent to each other via joining members 4 and 11 to be engaged with engagement plates 3 and 3, and comprise the steel pipe 2 and the engagement plates 3, 3 joined with an outer circumferential surface of the steel pipe 2. The steel pipe piles 1 and 10 can be pressed into the ground in an easily rotating manner since the engagement plate 3 which is not projected much is provided on the outer circumferential surface of the steel pipe 2. Since the steel pipe piles 1, 1, 10 and 10 can surely be connected using the engagement plate 3 and the joining members 4 and 11, the continuous wall high in strength can be constructed, and the water sealing effect is realized between the steel pipe piles 1....

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile constituting a continuous wall formed in the ground and a steel pipe pile continuous wall construction method using the steel pipe pile.

[0002]

2. Description of the Related Art For example, conventionally, when a continuous wall is constructed in the ground, as shown in FIG. 8, one of the objectives is to prevent water from entering from a gap between adjacent steel pipe sheet piles A. The joints B, B are attached in advance. The joint B has a slit C formed in part, and the joints B and B are fitted so as to engage the slit C,
It connects the steel pipe sheet piles A, A that are next to each other. The steel pipe sheet pile A has at least one or more joints B provided on an outer peripheral surface. After one steel pipe sheet pile A is driven into the ground and buried, the other steel pipe sheet pile A is connected to the other steel pipe pile sheet A. The joint B provided on the sheet pile A and the joint B provided on one of the steel sheet piles A are engaged and buried in the ground while being engaged. After the other steel pipe sheet pile A is buried, another steel pipe sheet pile A is buried in the ground in the same manner as in the above method, whereby a desired continuous wall is constructed.

[0003] However, such a steel pipe sheet pile A is
Since the joint B protruding outward from the outer peripheral surface is provided, it was impossible to press-fit the steel pipe sheet pile A into the ground while rotating it. To cope with the above, there are steel pipe piles proposed in Japanese Patent Laid-Open Nos. 5-112929 and 5-112929. For example, steel pipe piles D and E shown in FIGS. It is used as a steel pipe pile that can be pressed into the ground while being pressed. As shown in FIG. 9-a, the steel pipe pile D has a desired number of channel steels F welded inside the steel pipe pile D, and a slit is formed on a side surface of the steel pipe pile D to which the channel steel F is welded. G is provided. Therefore, since the steel pipe pile D does not have a protruding joint formed outside its outer peripheral surface, it can be pressed into the ground while rotating. After press-fitting the steel pipe piles D, D into the ground, the engaging members H having the H-shaped cross section move the ends I, I of the engaging portions H from the upper ends of the channel steels F, F exposed on the ground. By inserting while engaging, it is buried underground. Therefore, the steel pipe piles D, D joined by the engaging portion H form a continuous wall, and the web J of the engaging portion H cuts off the ground so as to bisect the ground to prevent infiltration. The continuous wall formed by the stake D will have water-blocking properties.

Further, as shown in FIG. 9-b, since the steel pipe pile E is not provided with a special member used as a joint on its outer peripheral surface, it can be pressed into the ground while rotating. is there. And the said steel pipe pile E is this steel pipe pile E
The water stop pipes K, K having a diameter smaller than the diameter of the steel pipe piles E are buried in the ground and pressed into the ground so as to be in contact with both outer peripheral surfaces of the adjacent steel pipe piles E, E. The wall is
Since the gap between the adjacent steel pipe piles E, E is shut off by the water stop pipe K, the water stop is provided.

[0005]

By the way, in order to weld the channel steel F inside the steel pipe pile D and to provide the slit G as described above, it is not only troublesome and costly, but also that the steel pipe pile D is required to be welded. At the time of press-fitting into the ground, earth and sand sometimes flowed into the channel F through the slit G. Further, after the steel pipe pile E with the water stop pipe K is pressed into the ground, the steel pipe pile E is put into an area surrounded by the two steel pipe piles E, E adjacent to the water stop pipe K, K. Not only does it take time to fill the water stopping material, but also because the water stopping pipe K and the steel pipe pile E are not guided, there is a possibility that the water stopping pipe K is separated from the steel pipe pile E. .

The present invention has been made in view of the above circumstances, and when a continuous wall is constructed underground, a water-stopping effect is easily and reliably applied to the continuous wall, and further, it is pressed into the ground while rotating. It is an object of the present invention to provide a steel pipe pile and a steel pipe pile continuous wall construction method that can be performed.

[0007]

In order to achieve the above object, a steel pipe pile according to a first aspect of the present invention is, as shown in FIGS. 1 to 7, for example, a steel pipe 2 serving as a pile body, And an engaging plate 3 joined to an outer peripheral surface of the steel pipe 2.
Steel pipe piles 1, 1 which are connected to each other via connecting members 4, 11 which engage with the engaging plate 3 to form a continuous wall
0, the engaging plate 3 is provided so as to extend along the outer peripheral surface of the steel pipe 2 and in the up-down direction, and one of the left and right side edges 5 of the engaging plate 3 is The steel pipe 2
And the side edges of the joining members 4 and 11 are sandwiched between the other side edge 6 of the engagement plate 3 and the steel pipe 2. Things.

The steel pipe 2 has, for example, a long cylindrical shape. The engagement plate 3 can hold the joining members 4 and 11 by joining to the outer peripheral surface of the steel pipe 2. For example, the engagement plate 3 extends continuously vertically in the vertical direction on the surface of the steel pipe 2. It is desirable to use a plate-like steel material. Preferably, the engaging plate 3 has an arc-shaped cross section along the outer peripheral surface of the steel pipe 2. Further, a plurality of the engagement plates 3 are provided on the surface of the steel pipe 2 as necessary. The joining members 4 and 11 preferably have substantially the same length as the steel pipe 2, and may be any as long as they can engage with the respective engaging plates 3 provided on the outer peripheral surface of the adjacent steel pipe 2. For example, a clamping portion 8 (flange) clamped by the other side edge 6 of the engagement plate 3
It is desirable that the holding portion 8 be constituted by a water stopping portion 9 (web) formed between the holding portions 8.

According to the steel pipe pile according to the first aspect, the engaging plates 3 provided on the steel pipe 2 are vertically long plates, so that they can be constructed at a minimum cost and at a minimum.
Even if the engaging plates 3 are joined to the outer peripheral surface of the steel pipe 2, the steel pipe piles 1 and 10 can be easily press-fitted while rotating because they do not protrude greatly. In addition, the adjacent steel pipes 2 can form a continuous wall by fitting the joining members 4 and 11 to the engagement plates 3. Can produce a water effect.

In the steel pipe pile continuous wall method according to the second aspect, for example, as shown in FIGS. 2 to 5 and FIG. 7, in the steel pipe pile according to the first aspect, the steel pipe piles 1 and 10 are buried in a line. Steel pipe piles 1, 1, 10, 1
The joining members 4 and 11 are arranged between the two to join the adjacent steel pipes 2 and 2 and, at the time of joining, the upper ends of the engaging plates 3 of the adjacent steel pipe piles 1, 1, 10 and 10. In a state where the lower end portions of the side edges of the joining members 4 and 11 are sandwiched between the other side edge 6 of the engaging plate 3 and the steel pipe 2, the joining members 4 and 1
1 is pushed downward, so that the joining members 4, 1 are located between the steel pipe 2 and the other side edge 6 of the engagement plate 3.
1 is characterized in that the side edge portion is held downward.

According to the steel pipe pile continuous wall method of the second aspect, the same effect as that obtained from the steel pipe pile of the first aspect can be obtained.

In the steel pipe pile continuous wall method according to the third aspect, as shown in FIGS. 2 to 5 and 7, for example, in the steel pipe pile continuous wall method according to the second aspect, before the steel pipe pile 1 is buried. The other side edge 6 of the engagement plate 3 is attached to the steel pipe 2,
A state in which it is detachably joined to the steel pipe 2 and a lower end of the side edge of the joining member 4 is sandwiched between the other side edge 6 of the engagement plate 3 and the steel pipe 2. After that, when the joining plate 3 is pushed down, the steel pipe 2
Between the steel pipe 2 and the other side edge 6 of the engagement plate 3 while disengaging the engagement between the steel tube 2 and the other side edge 6 of the engagement plate 3 downward. It is characterized in that the edge is clamped downward.

According to the third aspect of the present invention, the other side edge portion 6 of the engaging plate 3 is detachably joined to the steel pipe 2 from the steel pipe 2. 1 can be prevented from being turned up when embedding 1.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a steel pipe pile according to the present invention will be described below with reference to FIGS.

(First Embodiment) A steel pipe pile 1 of the present embodiment.
As shown in FIGS. 1 to 5, a continuous wall is constructed by joining adjacent steel pipes 2 and 2 via a joining member 4 which engages with an engaging plate 3 and 3. The steel pipe 2 serving as a main body is provided with the engagement plates 3 and 3 joined to the outer peripheral surface of the steel pipe 2.

The steel pipe 2 is a hollow and long tubular body, and has a circular cross section. In addition, the steel pipe 2
Is press-fitted to the required depth so that the required vertical support strength is obtained, but when the total length is long, a plurality of unit-length steel pipes 2 are sequentially connected by field welding or other methods to rotate. Press-fit. The engagement plate 3 is made of a bendable vertically long steel plate, and is disposed so as to extend in a vertical direction at two locations on the outer peripheral surface opposed to each other with the center of the steel pipe 2 interposed therebetween. One of the left and right side edges 5 of the plywood 3 is firmly joined (welded) to the steel pipe 2.
At the same time, the other side edge 6 of the engagement plate 3 is joined to the steel pipe 2 by intermittent welding (see FIG. 4) so as to be detachable from the steel pipe 2.

As shown in FIG. 4, between the upper end of the side edge 6 of the engaging plate 3 and the steel pipe 2, the upper end thereof is not joined to the steel pipe 2 but is connected to the steel pipe 2. A gap portion 7 bent away is formed. Further, before the intermittent welding of the steel pipe 2 and the side edge 6, between the side edge 6 and the outer peripheral surface of the steel pipe 2, a dry lubricating material for seizure prevention or water stop was also used. Bentonite powder is applied. Therefore, after the steel pipe pile 1 is press-fitted, the intermittent welding performed on the side edge portion 6 and the steel pipe 2 can be easily separated by inserting the joining member 4. When the steel pipe pile 1 is press-fitted into the ground while rotating, the engagement plate 3 is joined so as not to protrude greatly from the outer peripheral surface of the steel pipe 2, so that the engagement plate 3 does not interfere. In addition, one side edge 5 of the engagement plate 3
Since the steel pipe pile 1 is rotated with respect to the other side edge 6 in a direction that is the front side of the rotation of the steel pipe pile 1, the turning of the engagement plate 3 at the time of swivel press fitting is prevented, and the steel pipe pile 1 itself is rotated. It can be press-fit.

The joining member 4 is connected to the adjacent steel pipe piles 1, 1
Are formed in a substantially Z-shape so that they can be sandwiched between the side edges 6, 6 of the two engagement plates 2, 2, and have plate-like shapes extending in the vertical direction on both side edges thereof. It is composed of holding portions 8, 8, and a plate-like water stopping portion 9 provided between the holding portions 8, 8 and extending in the up-down direction.

When joining the adjacent steel pipe piles 1 arranged in a line to a predetermined depth and press-fitted at intervals corresponding to the size of the joining member 4, first, The lower ends of the holding parts 8, 8 of the joining member 4 are inserted into gaps 7, 7 provided between the upper ends of the engaging plates 3, 3 of the adjacent steel pipe piles 1, 1 and the steel pipe 2, respectively. Is done. Then, when the joining member 4 is press-fitted downward, the side edge 6 is intermittently joined to the steel pipe 2, so that the intermittent joining of the side edge 6 is disengaged downward, and the holding portion is 9 is tightly sandwiched between the steel pipe 2 and the other side edge 6 of the engaging plate 3, and the water stopping portion 9 blocks between the adjacent steel pipes 2, 2. A water stopping effect can be brought about in the gap between them. Further, the joining member 4
Is pressed from the ground to a depth at which a water-stopping effect can be obtained in order to obtain a water-stopping effect between the steel pipe piles 1.
Needless to say, the joining members 4 are press-fitted while being sequentially connected by welding or the like having a unit length as necessary, and the upper end thereof is positioned at substantially the same level as the upper end of the steel pipe pile 1.

Next, a steel pipe pile continuous wall method using the steel pipe pile 1 will be described. First, at a construction site, a plurality of steel pipe piles 1.
An engaging plate 3 provided on a surface of the adjacent steel pipe pile 1;
The steel pipe piles 1 and 1 are adjusted so that the pipes 3 face each other.
Thereafter, the lower ends of the holding portions 8, 8 of the joining member 4 are inserted into gaps 7, 7 provided at the upper ends of the engaging plates 3, 3 of the adjacent steel pipe piles 1, 1, respectively. The steel pipe 2 and the other side edge 6 of the engagement plate 3 are vertically press-fitted while releasing the intermittent engagement downward.

Therefore, in the steel pipe pile continuous wall construction method using steel pipe piles of the present embodiment, since the steel pipe pile 1 is provided with the engaging plate 3 which does not largely protrude from the outer peripheral surface of the steel pipe 2,
Press-fitting is possible while easily rotating. Moreover, since the connection between the steel pipe piles 1 and 1 can be reliably connected using the engaging plate 3 provided on the outer peripheral surface of the steel pipe 2 and the joining member 4, a continuous wall having high strength is constructed. And a water stopping effect can be provided between the steel pipe piles 1.

(Second Embodiment) A steel pipe pile 10 of the present embodiment.
Are steel pipes 2 and 2 adjacent to each other as shown in FIGS.
A continuous wall is constructed by joining the members together via a joining member 11 that engages with the engaging plates 3..., Wherein the steel pipe 2 serving as a pile main body and the steel pipe 2 joined to the outer peripheral surface of the steel pipe 2 are connected. Are provided.

The steel pipe pile 10 and the steel pipe pile continuous wall method using the steel pipe pile 10 are used for the steel pipe pile 1 and the steel pipe pile 1.
The difference from the steel pipe pile continuous wall method using
And the shape of the joining member 11, and the other points are the same. Therefore, among the components of the steel pipe pile 10, the same components as those of the steel pipe pile 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6, the engaging plate 3 has four outer peripheral surfaces opposed to each other with the center of the steel pipe 2 interposed therebetween.
The outer side edges 5, 5 of the engaging plates 3, 3 which are arranged so as to extend in the vertical direction and are adjacent to the vicinity thereof are firmly joined to the steel pipe 2, and the inner side of the engaging plates 3, 3 Side edge 6,
Reference numeral 6 is intermittently welded to the steel pipe 2 so as to be detachable from the steel pipe 2.

The joining member 11 is made of a steel material having a substantially H-shaped cross section.
12 with the engaging plates 3 of the adjacent steel pipes 2, 2,.
The steel pipe pile 10 can be joined by being fitted to the side edges 6... Of the joining members 11, and the web 13 of the joining member 11 cuts off between the adjacent steel pipes 2, so that the water stopping effect is obtained. Can bring. At this time, a space generated by fitting the joining member 11 to the engaging plates 3
A waterproof material 14 such as a grout material may be filled.

Therefore, in the steel pipe pile continuous wall method using steel pipe piles of the present embodiment, the steel pipe pile 10 is provided with the engaging plate 3 which does not protrude greatly on the outer peripheral surface of the steel pipe 2, so that the steel pipe pile 10 can be easily rotated while rotating. Can be press-fit. Also,
Since the connection between the steel pipe piles 10 and 10 can be reliably connected using the engaging plate 2 provided on the outer peripheral surface of the steel pipe 2 and the joining member 11, a continuous wall having high strength can be constructed. And a water stopping effect can be provided between the steel pipe piles 10.

A plurality of engaging plates 3 are provided at any position on the outer peripheral surface of the steel pipe 2 as necessary.
Therefore, even when the continuous wall is provided in an arc shape or a curved shape, each time the steel pipe piles 1 and 10 are attached to the engagement plate 3.
.. Can be easily joined by fitting the joining members 4 and 11 to each other, and a water stopping effect can be provided between the steel pipe piles 1.

[0028]

As described above, according to the steel pipe pile according to the first aspect, since the engaging plate provided on the steel pipe is a vertically long plate, it can be constructed at a minimum cost. Alternatively, even if the engaging plate is joined to the outer peripheral surface of the steel pipe, it does not protrude greatly, so that the steel pipe pile can be easily press-fitted while rotating. Further, it is possible to minimize the press-in resistance of the section (engagement plate) when press-fitting without rotating. Furthermore, since the adjacent steel pipes can form a continuous wall by fitting the joining member to the engagement plate, a water stopping effect can be easily provided in the gap between the steel pipes.

According to the steel pipe pile continuous wall method according to the second aspect of the invention, the same effect as the first aspect can be obtained.

According to the steel pipe pile continuous wall method according to the third aspect of the invention, the same effect as that of the second aspect can be obtained, and the other side edge of the engagement plate is formed of the steel pipe. Since it is detachably joined to the steel pipe,
When the steel pipe pile is buried, the engagement plate can be prevented from being turned up.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a steel pipe pile according to the present invention.

FIG. 2 is a plan view showing an example of a state in which the steel pipe piles according to the present invention are joined by joining members.

FIG. 3 is a plan view showing a joint state of an engagement plate in the steel pipe pile according to the present invention.

FIG. 4 is a main part front view showing an upper end portion of the steel pipe pile according to the present invention.

FIG. 5 is a plan view of a main part showing a state where the engagement plate and the joining member in the steel pipe pile according to the present invention are fitted.

FIG. 6 is a cross-sectional view showing another example of the steel pipe pile according to the present invention.

FIG. 7 is a plan view showing another example of a state in which the steel pipe piles according to the present invention are joined by joining members.

FIG. 8 is a main part plan view showing an example of a conventional steel pipe pile continuous wall method.

FIG. 9 is a main part plan view showing another example of the same.

[Explanation of symbols]

 1.10 Steel pipe pile 2 Steel pipe 3 Engagement plate 4.11 Joining member 5 One side edge 6 The other side edge

Claims (3)

[Claims] 1. A joint comprising: a steel pipe serving as a pile main body; and an engaging plate joined to an outer peripheral surface of the steel pipe. A plurality of the steel pipes are buried side by side, and adjacent steel pipes are engaged with the engaging plate. A steel pipe pile for constructing a continuous wall by joining via members, wherein the engaging plate is provided so as to extend along the outer peripheral surface of the steel pipe and extend in a vertical direction. One of the side edges is joined to the steel pipe, and the side edge of the joining member is sandwiched between the other side edge of the engagement plate and the steel pipe. A steel pipe pile characterized by being made. 2. A steel pipe pile continuous wall method using the steel pipe pile according to claim 1, wherein the steel pipe piles are arranged in a line and buried.
A joining member is arranged between the steel pipe piles buried adjacent to each other to join the adjacent steel pipes, and at the time of joining, at the upper end portion of the engaging plate of each of the steel pipe piles adjacent to each other, the other of the engaging plates is provided. After the lower end of the side edge of the joining member is sandwiched between the side edge and the steel pipe, by pressing down the joining member downward, the other side of the steel pipe and the engagement plate A steel pipe pile continuous wall method, wherein a side edge of the joining member is sandwiched downward between the edge and the edge. 3. The steel pipe pile continuous wall method according to claim 2, wherein, before embedding the steel pipe pile, the other side edge of the engaging plate is detachably joined to the steel pipe from the steel pipe;
When the lower end of the side edge of the joining member is sandwiched between the other side edge of the engagement plate and the steel pipe, and when the joining plate is pushed down, the steel pipe and While releasing the engagement with the other side edge of the engagement plate downward,
A steel pipe pile continuous wall method, wherein a side edge of the joining member is sandwiched downward between the steel pipe and the other side edge of the engagement plate.