JP4283393B2 - Steel pipe pile and steel pipe pile continuous wall method - Google Patents

Description

[0001]
BACKGROUND 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 this steel pipe pile.
[0002]
[Prior art]
For example, conventionally, when constructing a continuous wall in the ground, as shown in FIG. 8, a joint B having a water stop effect for preventing water intrusion from a gap between adjacent steel pipe sheet piles A and A, B is attached in advance. The joint B is formed with a slit C in a part thereof, and the joints B and B are fitted so as to engage the slit C, and the adjacent steel pipe sheet piles A and A are connected. .
The steel pipe sheet pile A is provided with at least one joint B on the outer peripheral surface, and after one steel pipe sheet pile A is driven into the ground and buried, the other steel pipe sheet pile A is used as the other steel pipe. In a state where the joint B provided on the sheet pile A and the joint B provided on one steel pipe sheet pile A are engaged, they are driven into the ground and buried. After embedding the other steel pipe sheet pile A, the construction of a desired continuous wall is performed by embedding another steel pipe sheet pile A in the ground in the same manner as described above.
[0003]
However, since such a steel pipe sheet pile A is provided with a joint B that protrudes outward from the outer peripheral surface, it is impossible to press-fit the steel pipe sheet pile A into the ground while rotating the steel pipe sheet pile A. Therefore, there are steel pipe piles proposed in Japanese Patent Laid-Open Nos. H5-112928 and H5-112929 to cope with the above. 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.
As shown in FIG. 9A, the steel pipe pile D has a desired number of groove steels F welded to the inside of the steel pipe piles D, and a slit is formed on the side surface of the steel pipe pile D to which the groove steel F is welded. G is provided. Therefore, the steel pipe pile D can be press-fitted into the ground while being rotated because no protruding joint is formed outside the outer peripheral surface thereof. After the steel pipe piles D and D are press-fitted into the ground, the engaging member H having an H-shaped cross section is connected to both ends I and I of the engaging portion H from the upper ends of the grooved steels F and F exposed on the ground. By being inserted while being engaged, it is buried in the ground. Therefore, the steel pipe piles D and D joined by the engaging portion H form a continuous wall, and the web J of the engaging portion H is cut off so as to bisect the ground to prevent inundation. The continuous wall formed by the pile D will have a water-stopping property.
[0004]
In addition, as shown in FIG. 9B, the steel pipe pile E can be press-fitted into the ground while rotating because the member used as a joint is not provided on the outer peripheral surface. The steel pipe pile E is press-fitted into the ground so that the water stop pipes K, K having a diameter smaller than the diameter of the steel pipe pile E are in contact with both outer peripheral surfaces of the steel pipe piles E, E that are buried in the ground and adjacent to each other. Thus, the continuous wall formed by the steel pipe pile E has water-stopping properties because the gap between the adjacent steel pipe piles E and E is blocked by the water stop pipe K.
[0005]
[Problems to be solved by the invention]
By the way, in order to weld the grooved steel F inside the steel pipe pile D and provide the slit G as described above, it takes time and cost, and when the steel pipe pile D is pressed into the ground, In some cases, earth and sand flow into the grooved steel F through the slit G.
Moreover, the steel pipe pile E with the water stop pipe K is in the area | region enclosed by the two steel pipe piles E and E adjacent to this water stop pipe K and K after the steel pipe pile E press-fits in the ground. Not only does it take time and effort to fill the water stop material, but the water stop pipe K and the steel pipe pile E are not guided, so that the water stop pipe K may be separated from the steel pipe pile E. .
[0006]
The present invention has been made in view of the above circumstances, and when constructing a continuous wall in the ground, it can provide a water-stopping effect to the continuous wall easily and reliably, and can be press-fitted into the ground while rotating. It aims at providing the steel pipe pile and the steel pipe pile continuous wall construction method.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a steel pipe pile according to claim 1 of the present invention includes a steel pipe 2 as a pile body and a joint joined to the outer peripheral surface of the steel pipe 2 as shown in FIGS. A plurality of the steel pipes 2 are arranged side by side and embedded, and the adjacent steel pipes 2 and 2 are joined to each other via the joining members 4 and 11 engaged with the engaging plate 3 to construct a continuous wall. Steel pipe piles 1, 10, wherein the engagement plate 3 is provided so as to extend in the vertical direction along the outer peripheral surface of the steel pipe 2, and one of the left and right side edges of the engagement plate 3. A side edge portion 5 is joined to the steel pipe 2 and the other side edge portion 6 of the engagement plate 3 is detachably joined from the steel pipe 2 , and the other side edge portion 6 is removed from the steel pipe 2. while the, that side edge portions of the joining member 4 and 11 is adapted to be clamped It is an butterfly.
[0008]
The steel pipe 2 has a long cylindrical shape, for example.
The engagement plate 3 can sandwich the joining members 4 and 11 by being joined to the outer peripheral surface of the steel pipe 2. For example, the engagement plate 3 continuously extends vertically on the surface of the steel pipe 2. The existing plate-shaped steel material is desirable. The engagement plate 3 preferably has an arcuate 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. It is preferable that the joining members 4 and 11 have substantially the same length as the steel pipe 2, and any member that can engage with the respective engagement plates 3 provided on the outer peripheral surface of the adjacent steel pipe 2 may be used. For example, it is comprised by the clamping part 8 (flange) clamped by the other side edge part 6 of the said engagement board 3, and the water stop part 9 (web) formed between these clamping parts 8 and 8. FIG. Is desirable.
[0009]
According to the steel pipe pile of claim 1,
The engagement plates 3 provided on the steel pipe 2 are vertically long plate-like shapes, so that they can be configured at a minimum cost, and the engagement plates 3 are joined to the outer peripheral surface of the steel pipe 2. However, since it does not protrude greatly, the steel pipe piles 1 and 10 can be press-fitted while rotating easily.
Moreover, since the adjacent steel pipes 2 and 2 can construct | assemble a continuous wall by fitting the said joining members 4 and 11 to the said engagement plates 3 ..., it stops in the clearance gap between the said steel pipes 2 and 2 easily. Can bring water effect.
[0010]
The steel pipe pile continuous wall construction method according to claim 2 is a steel pipe pile continuous wall construction method using the steel pipe pile according to claim 1, for example, as shown in FIGS. 2 to 5 and 7. 10 are arranged in a row, and at the upper end portion of the engagement plate 3 of each of the adjacent steel pipe piles 1, 1, 10, 10, between the other side edge 6 of the engagement plate 3 and the steel pipe 2. When the joining members 4 and 11 are pushed downward after the lower end portions of the side edges of the joining members 4 and 11 are sandwiched , the other side of the steel pipe 2 and the engagement plate 3 While releasing the engagement with the edge 6 downward, the side edges of the joining members 4 and 11 are moved downward between the steel pipe 2 and the other side edge 6 of the engagement plate 3. It is characterized by being pinched.
[0011]
According to the steel pipe pile continuous wall construction method according to claim 2, the same effect as that obtained from the steel pipe pile according to claim 1 can be obtained.
In particular, since the other side edge 6 of the engagement plate 3 is detachably joined to the steel pipe 2 from the steel pipe 2, the engagement plate 3 is prevented from being turned over when the steel pipe pile 1 is embedded. be able to.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Below, the embodiment in the steel pipe pile which concerns on this invention is described based on FIGS.
[0015]
(First embodiment)
As shown in FIGS. 1 to 5, the steel pipe pile 1 of this example constructs a continuous wall by joining adjacent steel pipes 2 and 2 via a joining member 4 that engages engagement plates 3 and 3. The steel pipe 2 serving as a pile body and the engagement plates 3 and 3 joined to the outer peripheral surface of the steel pipe 2 are provided.
[0016]
The said steel pipe 2 is a hollow elongate cylinder, The cross section is formed circularly. Further, the steel pipe 2 is rotationally press-fitted to a required depth so as to obtain a required vertical support strength. When the total length is increased, a plurality of unit length steel pipes 2 are welded by field welding or other methods. Connected sequentially and press-fitted.
The engagement plate 3 is made of a vertically long bendable steel plate, and is disposed so as to extend in the vertical direction at two outer peripheral surfaces facing each other across the center of the steel pipe 2. One side edge 5 of the left and right side edges of the plywood 3 is firmly joined (welded) to the steel pipe 2, and the other side edge 6 of the engagement plate 3 is removable from the steel pipe 2. Thus, the steel pipe 2 is intermittently welded (see FIG. 4) and joined.
[0017]
Further, as shown in FIG. 4, the upper end of the engagement plate 3 is separated from the steel pipe 2 without being joined to the steel pipe 2, as shown in FIG. 4. A bent gap 7 is formed. Further, before the intermittent welding between the steel pipe 2 and the side edge portion 6, between the side edge portion 6 and the outer peripheral surface of the steel pipe 2, it also serves as a dry type lubricant for preventing seizure or water stoppage. Bentonite powder is applied. Therefore, after the steel pipe pile 1 is press-fitted, the intermittent welding applied to the side edge portion 6 and the steel pipe 2 can be easily separated by inserting the joining member 4.
And when the said engagement plate 3 press-fits rotating the said steel pipe pile 1 in the ground, since it joins so that it may not protrude greatly from the outer peripheral surface of the said steel pipe 2, the said engagement plate 3 does not become obstructive. In addition, since one side edge 5 of the engagement plate 3 is rotated in the direction of the front side of the rotation of the steel pipe pile 1 with respect to the other side edge 6, the engagement plate at the time of swiveling press-fitting is used. The turning-up of 3 is prevented, and the steel pipe pile 1 itself can be press-fitted while rotating.
[0018]
The said joining member 4 is formed in the substantially cross-sectional Z shape so that it can be clamped by the side edge parts 6 and 6 in both the engagement plates 2 and 2 of the adjacent steel pipe piles 1 and 1, The both sides It is comprised by the plate-shaped clamping parts 8 and 8 each extended in an up-down direction at the edge part, and the plate-shaped water stop part 9 provided between these clamping parts 8 and 8 and extended in the up-down direction.
[0019]
When joining the steel pipe piles 1... That are press-fitted in a row to a predetermined depth at intervals corresponding to the size of the joining member 4, the joining member 4 is first joined. The lower end portions of the sandwiching portions 8 and 8 are respectively inserted into gap portions 7 and 7 provided between the upper end portions of the engagement plates 3 and 3 of the adjacent steel pipe piles 1 and 1 and the steel pipe 2. Thereafter, when the joining member 4 is press-fitted downward, the side edge portion 6 is intermittently joined to the steel pipe 2, so that the intermittent joining of the side edge portion 6 is removed downward, and the clamping portion 9 is tightly sandwiched between the steel pipe 2 and the other side edge 6 of the engagement plate 3, and the water stop portion 9 blocks between the adjacent steel pipes 2, 2. A water stop effect can be brought about in the gap between them.
Moreover, in order to obtain the water stop effect between the steel pipe piles 1..., The joining member 4 is press-fitted from the ground to a depth at which the water stop effect can be obtained. Then, the unit length is press-fitted while being sequentially connected by welding or the like, and the upper end portion thereof is set at a position substantially the same as the upper end portion of the steel pipe pile 1.
[0020]
Next, the steel pipe pile continuous wall construction method using the said steel pipe pile 1 is demonstrated.
First, a plurality of steel pipe piles 1 are pressed into a predetermined depth at appropriate intervals at a construction site, and the steel pipe piles 1, 3 provided on the surfaces of adjacent steel pipe piles 1, 1 are substantially opposed to each other. Adjust the piles 1 and 1. Thereafter, after inserting the lower end portions of the sandwiching portions 8, 8 of the joining member 4 into the gap portions 7, 7 provided at the upper end portions of the engaging plates 3, 3 of the adjacent steel pipe piles 1, 1, The intermittent engagement between the steel pipe 2 and the other side edge 6 of the engaging plate 3 is vertically press-fitted while releasing downward.
[0021]
Therefore, in the steel pipe pile continuous wall construction method using the steel pipe pile of the present example, the steel pipe pile 1 is provided with the engagement plate 3 that does not protrude greatly on the outer peripheral surface of the steel pipe 2, and therefore is easily press-fitted while rotating. Can do. Moreover, since the steel pipe piles 1 and 1 can be reliably connected using the engagement plate 3 and the joining member 4 provided on the outer peripheral surface of the steel pipe 2, a high-strength continuous wall is constructed. In addition, it is possible to provide a water stop effect between the steel pipe piles 1.
[0022]
(Second Embodiment)
As shown in FIGS. 6 and 7, the steel pipe pile 10 of the present example is configured to construct a continuous wall by joining adjacent steel pipes 2, 2 via joining members 11 that engage with the engagement plates 3. And the said steel pipe 2 used as a pile main body and the said engaging plate 3 ... joined to the outer peripheral surface of this steel pipe 2 are comprised.
[0023]
The steel pipe pile 10 and the steel pipe pile continuous wall construction method using the steel pipe pile 10 are different from the steel pipe pile 1 and the steel pipe pile continuous wall construction method using the steel pipe pile 1 in that the mounting position of the engagement plate 3 and The shape of the joining member 11 is the same in other respects. Therefore, the same code | symbol is attached | subjected about the component similar to the said steel pipe pile 1 among each component of the said steel pipe pile 10, and the description is abbreviate | omitted.
[0024]
As shown in FIG. 6, the engagement plate 3 is disposed so as to extend along the vertical direction at four outer peripheral surfaces facing each other across the center of the steel pipe 2, and is adjacent to the vicinity of the engagement plate 3. 3, the outer side edge portions 5, 5 are firmly joined to the steel pipe 2, and the inner side edge portions 6, 6 of the engagement plates 3, 3 are detachable from the steel pipe 2. The steel pipe 2 is intermittently welded and joined.
[0025]
The joining member 11 is made of a steel material having a substantially H-shaped cross section, and the side edges of the flanges 12, 12 of the joining member 11 are connected to the side edges 6 of the engaging plates 3 of the adjacent steel pipes 2, 2. The steel pipe piles 10 can be joined by being fitted to ..., and the web 13 of the joining member 11 can cut off between the adjacent steel pipes 2 and 2, thereby providing a water stop effect. At this time, a space generated by fitting the joining member 11 to the engagement plates 3 may be filled with a water stop material 14 such as a grout material.
[0026]
Therefore, in the steel pipe pile continuous wall construction method using the steel pipe pile of the present example, the steel pipe pile 10 is provided with the engagement plate 3 that does not protrude greatly on the outer peripheral surface of the steel pipe 2, and therefore is easily press-fitted while rotating. Can do. Further, since the steel pipe piles 10 and 10 can be reliably connected using the engagement plate 2 and the joining member 11 provided on the outer peripheral surface of the steel pipe 2, a continuous wall having high strength is constructed. In addition, it is possible to provide a water stop effect between the steel pipe piles 10.
[0027]
In addition, the said engaging plate 3 is provided with two or more in the position in any one of the outer peripheral surface of the said steel pipe 2 as needed. Therefore, even when the continuous wall is provided in an arc shape or a curved shape, the steel pipe piles 1 and 10 can be easily joined by fitting the joining members 4 and 11 to the engagement plates 3. While being able to do, it can bring about a water stop effect between the steel pipe piles 1.
[0028]
【The invention's effect】
As mentioned above, according to the steel pipe pile of Claim 1,
Since the engagement plate provided on the steel pipe is a vertically long plate-like shape, it can be configured at a low cost as much as possible, and even when the engagement plate is joined to the outer peripheral surface of the steel pipe, it protrudes greatly. Therefore, the steel pipe pile can be press-fitted while rotating easily. Further, it is possible to minimize the press-fitting resistance of the section portion (engagement plate) when press-fitting without rotating. Furthermore, since the adjacent steel pipe can construct | assemble a continuous wall by fitting the said joining member to the said engagement plate, it can bring about the water stop effect easily in the clearance gap between the said steel pipes.
[0029]
According to the steel pipe pile continuous wall construction method according to the invention of claim 2, the same effect as that of claim 1 can be obtained.
Moreover, since the other side edge part of the said engagement plate is detachably joined to the said steel pipe from this steel pipe, when the said steel pipe pile is embed | buried, the turn-up of the said engagement plate can be prevented.
[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 steel pipe piles according to the present invention are joined by a joining member.
FIG. 3 is a plan view showing a joining state of engagement plates in a steel pipe pile according to the present invention.
FIG. 4 is a main part front view showing an upper end portion of a steel pipe pile according to the present invention.
FIG. 5 is a plan view of a principal part showing a state in which an engagement plate and a joining member are fitted in a steel pipe pile according to the present invention.
FIG. 6 is a cross-sectional view showing another example of a steel pipe pile according to the present invention.
FIG. 7 is a plan view showing another example of a state in which steel pipe piles according to the present invention are joined by a joining member.
FIG. 8 is a plan view of an essential part showing an example of a conventional steel pipe pile continuous wall construction method.
FIG. 9 is a plan view of a principal part showing another example.
[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 (2)

A steel pipe as a pile main body and an engagement plate joined to the outer peripheral surface of the steel pipe, and a plurality of the steel pipes are arranged and buried, and the adjacent steel pipes are joined via a joining member that engages the engagement plate. A steel pipe pile for building a continuous wall by
The engaging plate is provided so as to extend in the vertical direction along the outer peripheral surface of the steel pipe, one side edge of the left and right side edges of the engaging plate is joined to the steel pipe, and the The other side edge portion of the engagement plate is detachably joined from the steel pipe, and the side edge portion of the joining member is sandwiched while the other side edge portion is removed from the steel pipe . A steel pipe pile characterized by that. A steel pipe pile continuous wall construction method using the steel pipe pile according to claim 1,
The steel pipe piles are buried in a row, and at the upper end portion of the engagement plate of each adjacent steel pipe pile, the lower end of the side edge portion of the joining member is provided between the other side edge portion of the engagement plate and the steel pipe. When the joining member is pushed down after the part is clamped , the steel pipe and the engagement member are disengaged downward while releasing the engagement between the steel pipe and the other side edge of the engagement plate. A steel pipe pile continuous wall construction method characterized in that the side edge portion of the joining member is sandwiched downward between the other side edge portion of the plywood.

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