JP2001032264A - U-shaped steel sheet pile, and method for juxtaposing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the work execution period from being prolong by preventing the expansion and contraction between side plate parts in driving steel sheet piles. SOLUTION: In a U-shaped steel sheet pile integratedly having a plate-like center part 2, a pair of continuous side plate parts 3, 3 therefrom on both sides, and adjacent sheet pile connection parts 4, 4 provided on free edge parts of the side plate parts 3, 3 is provided with reinforcing members 5, 5 which are fixed to each of a pair of side plate parts 3, 3 thereacross, and keeps the angle of the side plate parts 3, 3 with respect to a center part 1 at a specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a U-shaped sheet pile and a method for juxtaposing U-shaped sheet piles using the same.

[0002]

2. Description of the Related Art As is well known, steel sheet piles are plate-like piles that are driven into the ground for earth retaining, water retaining, and the like. Generally, a plurality of steel sheet piles are arranged side by side along a target line without gaps. As the shape, there are a U type, a Z type, a straight type, an H type and the like, and as shown in FIG.
Reference numeral 0 denotes a plate-shaped central portion 101, a pair of side plate portions 102, 102 connected to both sides thereof, and an adjacent sheet pile connecting portion 1 provided at a free edge of each side plate portion 102, respectively.
03 as a unit. When a plurality of such U-shaped steel sheet piles 100 are arranged side by side, the adjacent sheet piles 1
00 and 100 are connected to each other at connecting portions 102 and 102.

[0003]

However, in the conventional U-shaped sheet pile, the side plate portion is easily bent along a boundary portion with the center portion, and when such a U-shaped sheet pile is driven, the center of the side plate portion is formed. The bent angle with respect to the portion changes, and the side plate portions on at least one of the upper end side and the lower end side are deformed so as to expand or contract, and the side plate portions on the non-installed side are inclined with respect to the driving direction (the longitudinal direction of the sheet pile). There was sometimes.

[0004] Such an inclination may not be a problem when driving only one U-shaped sheet pile. But U
When arranging a plurality of steel sheet piles side by side, it is necessary to drive a new sheet pile following the existing sheet pile in which such a non-installed side plate part is inclined. In this case, the connection part of the existing sheet pile is also inclined, so Not only is it difficult to drive a new sheet pile while interconnecting, but also the new sheet pile is inclined as a whole, and at least the slope remains on the side plate part on the non-installed side sheet, and a side sheet part similar to that of the existing sheet pile Due to the expansion or contraction between them, the non-installed sheet pile side part of the new sheet pile was sometimes further inclined.

When a large number of sheet piles are juxtaposed, such an inclination increases, and finally, it becomes impossible to drive.
There has been a problem that a predetermined number of sheet piles cannot be driven into a predetermined parallel line. In addition, although it depends on the geology, in a normal case, as shown in FIG. 8, the sheet pile 100 is deformed so that the gap between the upper ends of the non-installed steel plate 102L and the existing steel plate 102R is expanded, and the central part 101 Has not been deformed, and it has been found that when a large number of sheet piles 100, 100,...

On the other hand, in the case where the above-mentioned inclination occurs, it has conventionally been dealt with by re-inserting a sheet pile that has been inclined and installed. In some cases, this was not fixed, and a prolonged construction period was inevitable.

Accordingly, a main object of the present invention is to prevent the expansion and contraction between the side plates at the time of driving a sheet pile,
Further, when the existing sheet pile is inclined with respect to the driving direction due to expansion and contraction between the side plate portions, it is possible to correct the inclination, thereby preventing the construction period from being lengthened.

[0008]

According to a first aspect of the present invention, there is provided a plate-shaped central portion, a pair of side plates connected to both sides thereof, and a free edge on each side plate. In a U-shaped steel sheet pile integrally having an adjacent sheet pile connecting portion provided on each of the portions, an angle of each of the side plate portions with respect to the central portion fixed to each of the pair of side plate portions is fixed. A U-shaped steel sheet pile provided with a reinforcing member for holding at an angle.

According to a second aspect of the present invention, the reinforcing member is
At least provided at the upper end and lower end of the sheet pile, the angle of each side plate portion with respect to the central portion is different at least for each arrangement position of each reinforcing member,
The U-shaped steel sheet pile according to claim 1, wherein at least one of the side plate portions is inclined with respect to a sheet pile longitudinal direction.

According to a third aspect of the present invention, a plate-shaped central portion, a pair of side plate portions connected to both sides thereof, and adjacent sheet pile connecting portions provided at free edges of the side plate portions are integrally formed. While having a plurality of U-shaped steel sheet piles side by side,
In the juxtaposition method of U-shaped steel sheet piles for connecting adjacent sheet piles at the joint portion at the time of juxtaposition, in a case where at least an uncut steel side plate portion of the existing sheet pile is inclined with respect to the driving direction, the uncut side sheet pile is not installed. As a new sheet pile to be juxtaposed, one or a plurality of U-shaped steel sheet piles for inclination correction having an inclined side plate part inclined in the opposite direction to the inclination of the non-installed steel sheet part in the existing sheet pile are juxtaposed. A method of juxtaposing U-shaped steel sheet piles, characterized in that a part or all of the inclination of the non-installed steel sheet side part in the existing sheet pile is canceled by the inclination of the inclined side plate part of the U-shaped steel sheet pile.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 3 show a U-type steel sheet pile example 1 according to the present invention. Similar to the conventional U-shaped steel sheet pile, the main sheet pile 1 has a plate-shaped central portion 2, a pair of side plate portions 3, 3 connected to both sides thereof, and each side plate portion 3, 3.
And the adjacent sheet pile connecting portions 4 and 4 respectively provided at the free edge portions of the above. Connecting parts 4, 4
Has a known shape, that is, has a hook shape in cross section, and is formed in the entire longitudinal direction of the free end edge of the side plate portion 3, and is formed with respect to the hook connection portion 4 A of the existing sheet pile 1 A. At the same time as the sheet pile is driven so that the hook-like connecting part 4 of the sheet pile 1 is hooked, the hook-like connecting part 4 of the new sheet pile 1 is opened from the upper end opening of the hook-like connecting part 4A of the existing sheet pile 1A.
The two sheet piles 1A, 1
Are connected.

In Example 1, in particular, according to the present invention,
Reinforcing members 5 and 5 are provided between the pair of side plate portions 3 and 3 which are fixed to the respective side plate portions 3 and 3 and maintain the angle of each side plate portion 3 with respect to the central portion 1 at a predetermined angle.

By providing one or a plurality of such reinforcing members 5 at appropriate places in the longitudinal direction of the sheet pile, the reinforcing member disposing portion is box-shaped and the side plates 3, 3 do not become free ends.
It is possible to prevent expansion and contraction between the side plate portions 3 and 3 at the time of driving, and to prevent inclination of the side plate portion 3 on the non-installed side with respect to the driving direction. Therefore, even if a plurality of the sheet piles 1 of the present invention are arranged side by side, it becomes impossible to drive the sheet piles 1 due to an increase in the inclination of the sheet piles 1 or a predetermined number of sheet piles cannot be driven into a predetermined parallel line. Disappears.
In addition, it is preferable to use a steel material such as a steel plate as the reinforcing member 5 from the viewpoint of performance and cost.

On the other hand, regarding the disposition positions of the reinforcing members 5, 5,
Considering the application to the ground where the upper side of the U-shaped steel sheet pile 1 expands and contracts, it is sufficient to dispose the reinforcing member 5 at the upper end of the sheet pile 1, and conversely, the ground where the lower side of the U-shaped steel sheet pile 1 expands and contracts. In consideration of the application to the sheet pile, it is sufficient to dispose the reinforcing member 5 at the lower end of the sheet pile 1, but it is difficult to consider such an influence of geology in advance.
At least the upper and lower ends of the sheet pile 1 are provided with reinforcing members 5,
5 are preferably provided.

However, providing the reinforcing members 5 and 5 at least at the upper end and the lower end of the sheet pile 1 as shown in the drawing has another significance. That is, when the reinforcing members 5 and 5 are fixed to the side plate portions 3 and 3, the distance between the side plate portions 3 and 3 is set individually for each reinforcing member arrangement position, so that This makes it possible to maintain the angles of the side plates 3, 3 at the same angle or at different angles for each reinforcing member disposition position. Accordingly, in the U-shaped steel sheet pile 1 of the present invention, the angle of each side plate portion 3, 3 with respect to the central portion 2 is changed for each disposition position of the reinforcing members 5, 5 by changing the length or the like of the reinforcing members 5, 5. The side plates 3 and 3 can be tilted with respect to the longitudinal direction of the sheet pile, or their angles can be made the same as in the prior art, and the side plates 3 and 3 can be adjusted parallel to the longitudinal direction of the sheet pile. You can.

The U-type steel sheet pile 1 of the present invention having the above-described features exhibits its effect in the sheet pile juxtaposition method of the present invention. Therefore, an example of a method of juxtaposing U-shaped steel sheet piles according to the present invention will be described below. FIG. 4 shows an example of a method for juxtaposing sheet piles according to the present invention. In this method, at the beginning of the driving, a plurality of conventional U-shaped sheet piles 100 without a reinforcing member are juxtaposed and juxtaposed. In the case of adjacent sheet piles 100, 10
0 are connected to each other at connecting portions 103, 103 (see FIG. 7; the same applies hereinafter). However, when the conventional U-shaped steel sheet piles 100, 100 are arranged side by side as they are, as described above, the sheet piles 10 are gradually expanded by the expansion and contraction between the side plate parts 102, 102 at least at one of the upper end and the lower end of the sheet pile 100.
The inclination with respect to the driving direction of 0 increases. Also, as described above, in the normal case, the angle formed by the side plate portions 102 and 102 and the central portion 101 is so set that the center portion 102 is not deformed and the upper end portions of the side plate portions 102 and 102 of the sheet pile 100 are widened. When a large number of sheet piles 100, 100,... Are arranged side by side, the sheet spreads in a fan-like shape as a whole. Therefore, FIG. 4 also shows a case where such a tendency occurs.

In this embodiment, in this case, as the new sheet piles juxtaposed to the non-installed side, the inclined side sheet sections 30, 3 inclined opposite to the inclination of the non-installed sheet side section 102 of the existing sheet pile 100.
One U-shaped steel sheet pile 10 for inclination correction having a zero is arranged in parallel, and the inclination of the inclined side plate parts 30, 30 of the U-shaped steel sheet pile 10 for inclination correction makes all the inclinations of the non-installed side plate part 102 of the existing sheet pile 100 complete. Try to negate. Thus, the non-installed ribbed side plate portion 30 of the inclination correcting U-shaped sheet pile 10 is not inclined, and the inclination of the existing sheet pile 100 has been corrected. The sheet piles 100 are juxtaposed. Although not shown in the figure, if the inclination of the non-installed sheet pile portion of the existing sheet pile becomes remarkable again, and a problem such as not being able to be carried out smoothly occurs, the sheet pile for inclination correction is again arranged in parallel, and the inclination is corrected. Do.

According to the present invention, the inclination correction can prevent the inclination of the existing sheet piles from being extremely increased even when a large number of sheet piles are juxtaposed. It is possible to prevent a predetermined number of sheet piles from being driven into the line. In addition, it is not necessary to re-drive the sheet pile, thereby making it possible to avoid lengthening the construction period.

In particular, as the U-shaped steel sheet pile 10 for correcting inclination, the above-described U-shaped steel sheet pile for correcting inclination, that is, the side plate portion of the U-shaped steel sheet pile similar to the conventional one is straightened at a predetermined angle, and For example, reinforcing members 5 and 5 having different lengths are arranged at the upper end and the lower end of the sheet pile, respectively, so that the side plate is inclined with respect to the driving direction and the inclination is not changed by the reinforcing members 5 and 5 at the time of driving. It is preferable to use a reinforced one. Needless to say, a conventional U-shaped sheet pile obtained by simply correcting the inclination of the side plate and having no reinforcing members 5, 5 can also be used for the above-mentioned inclination correction. In addition, the U-shaped sheet pile 10 for inclination correction in the illustrated example has side plate portions 30 and 3.
0 is inclined in the opposite direction to the existing sheet pile 100, and the inclination of both of the existing sheet piles 100 is canceled by the inclination of both of them. Of course, only one of them is inclined. Can be used (not shown).

Further, these U-shaped steel sheet piles 10 for inclination correction are used.
It is also possible to prepare a plurality of slides with the inclination angle beforehand, and to select and use them appropriately at the sheet pile driving site from among them, or after measuring the inclination of the existing sheet pile at the sheet pile driving site Alternatively, a sheet pile for inclination correction having a predetermined inclination angle corresponding to the inclination can be manufactured and used at a site or a factory.

On the other hand, in the present invention, it is not necessary to cancel all the inclinations of the existing sheet pile with one sheet pile as in the above example. For example, as shown in FIG.
In the case where the non-installed side wall portion 00 is inclined, the inclination may be canceled by a plurality of inclination correcting sheet piles 11, 11,.

Further, as described above, the inclination of the non-installed U-shaped steel sheet pile at the time of driving depends on the geology.
Conversely, this means that the inclination at the time of casting has a certain tendency in the same juxtaposed line. Therefore, when the tendency can be grasped to some extent (other cases are also possible), as shown in FIG. 6, for example, the conventional U-shaped steel sheet piles 100 having no reinforcing members have a predetermined correction angle. The sheet pile 12, 12, which is manufactured as described above.
By alternately driving the sheet piles, it is possible to prevent the existing sheet piles from being extremely inclined.

Further, although not shown, in one place in the same juxtaposition line, one inclination correcting sheet pile is used to cancel all inclinations of the existing sheet pile, and in other places, a plurality of inclination correcting sheet piles are used. In the other places, the conventional U-shaped steel sheet pile having no reinforcing member and the slope-corrected sheet pile previously manufactured to have a predetermined correction angle are alternately struck alternately. It is also possible to combine the above-described side-by-side forms, for example.

[0024]

As described above, according to the present invention, it is possible to prevent the expansion and contraction between the side plates at the time of driving the sheet pile, and the existing sheet pile is inclined with respect to the driving direction by the expansion and contraction between the side plates. In such a case, the inclination can be corrected, and the construction period can be prevented from being prolonged.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a U-type steel sheet pile according to the present invention.

FIG. 2 is a plan view of an example of a U-type steel sheet pile according to the present invention.

FIG. 3 is a front view of an example of a U-type steel sheet pile according to the present invention.

FIG. 4 is an explanatory view showing a first example of a method for juxtaposing U-shaped steel sheet piles according to the present invention.

FIG. 5 is an explanatory view showing a second example of the method for juxtaposing U-shaped steel sheet piles according to the present invention.

FIG. 6 is an explanatory view showing a third example of the method for juxtaposing U-shaped steel sheet piles according to the present invention.

FIG. 7 is a perspective view of a conventional U-shaped steel sheet pile.

FIG. 8 is an explanatory view of a conventional method for juxtaposing U-shaped steel sheet piles.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... U-shaped steel sheet pile, 2 ... central part, 3 ... side plate part, 4 ... connection part, 5 ... reinforcement part.

Claims (3)

[Claims] 1. A U-shaped steel sheet pile integrally comprising a plate-shaped central portion, a pair of side plate portions connected to both sides thereof, and adjacent sheet pile connecting portions provided at free edge portions of each side plate portion, respectively. A U-shaped steel sheet pile provided with a reinforcing member fixed between the pair of side plate portions and fixed to each of the side plate portions so as to maintain an angle of each side plate portion with respect to the central portion at a predetermined angle. 2. The reinforcing member is provided at at least an upper end portion and a lower end portion of the sheet pile, and an angle of each side plate portion with respect to the central portion is different at least for each arrangement position of each reinforcing member. The one side plate portion is inclined with respect to the sheet pile longitudinal direction.
The U-shaped steel sheet pile as described. 3. A plurality of U-shaped steel sheet piles integrally having a plate-shaped central portion, a pair of side plate portions connected to both sides thereof, and adjacent sheet pile connecting portions provided at free end edges of each side plate portion. In the juxtaposition method of the U-shaped steel sheet piles, which are arranged side by side and connect the adjacent sheet piles to each other at the connection part at the time of juxtaposition, when at least an uninstalled steel side plate part in the existing sheet pile is inclined with respect to the driving direction. A slope correcting plate having a sloped side plate portion which is inclined in a direction opposite to the slope of the non-installed river side plate portion in the existing sheet pile, as a new sheet pile which is juxtaposed to the non-installed side sheet
One or more shape steel sheet piles are arranged side by side, and the inclination of the inclined side plate part of the U-shaped steel sheet pile for inclination correction cancels part or all of the inclination of the non-installed side plate part in the existing sheet pile. A method for juxtaposing U-shaped steel sheet piles.