JP3681746B1 - Iron sheet pile and its insertion method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly insert an iron sheet pile into the ground.
An iron sheet pile 10 that is guided by a main pile 20 on both sides and is inserted into the ground, is attached to a predetermined position of the iron sheet pile 10, and the tip of a lead pile 30 into which the iron sheet pile 10 is inserted is in the insertion direction. The steel sheet pile 10 protrudes from the surface including the plate surface 10a of the iron sheet pile 10 when the iron sheet pile 10 is inserted into the ground. When the 10 is pulled out from the ground, a rotating member 40 stored in a plane including the plate surface 10a of the iron sheet pile 10 is provided.
[Selection] Figure 17

Description

  The present invention relates to an iron sheet pile and an insertion method thereof.

  For example, when a part of the ground is excavated to construct an underground part of a building, the ground that had been stable until then collapses to the excavation side, and a mountain retaining operation is performed to support this.

  In this mountain retaining operation, H-shaped steel (parent pile) is driven at a predetermined interval in the excavation area, and then excavated to the extent of a person's height (about 1.5 m) slightly wider than the area. Next, in order from the bottom, a large number of wooden cross-sheet piles are installed in series between the main piles, and anti-slip bars and wedges are attached. Finally, the gap between the horizontal sheet pile and the ground is refilled. Then, the process from excavation to backfilling is repeated until the final excavation depth is reached.

  In such a construction method, since the horizontal sheet pile is installed after excavating the ground, there is a possibility that the earth and sand may collapse when the horizontal sheet pile is installed, and the horizontal sheet pile may not be installed smoothly.

  Moreover, since the sheet piles are manually installed one by one, it takes time to install and it cannot be said that the work efficiency is good. Similarly, since it is not possible to excavate to the final excavation depth at a time, it cannot be said that the working efficiency is good in this respect.

  Furthermore, if excavation and backfill are repeated, the deeper the excavation, the more difficult it is to backfill the gap between the sheet pile and the ground, leaving a gap in the deep part of the ground or making the ground of that part fragile. As a result, the surrounding ground may sink.

  And since many horizontal sheet piles are installed in series in the vertical direction, it is impossible to pull out and collect the horizontal sheet piles after the construction is completed.

  As a technique for solving the above problems, for example, in Japanese Utility Model Publication No. 44-25225 (Patent Document 1), an iron sheet pile (iron sheet pile) having a final excavation depth is used. A technique is disclosed in which a latch is protruded from the tip of the driving side of the sheet, the tip of the press-fitted column is hooked on the latch, and the sheet pile is inserted into the ground by the press-fitted column.

According to this technique, since the sheet pile is embedded before excavation, excavation work can be performed without worrying about the collapse of the earth and sand, and the work efficiency is improved. Further, the sheet pile is inserted into the ground by applying a driving force to the tip of the sheet pile by the press-fitting column, so that the compression force is not applied and the strength may not be high. In addition, the sheet pile can be driven to the final excavation depth at a time, so the work efficiency is good.
Japanese Utility Model Publication No. 44-25225

  However, in the technique described in Patent Document 1, when the iron sheet pile is inserted into the ground, the friction between the sheet surface of the iron sheet pile and the ground becomes large, and cannot be embedded smoothly.

  Therefore, an object of the present invention is to provide a technique capable of smoothly inserting an iron sheet pile into the ground.

  In order to solve the above-mentioned problem, the iron sheet pile of the present invention is an iron sheet pile that is guided by support pillars on both sides and is inserted into the ground, and is an insertion pillar that is attached to a predetermined position of the iron sheet pile and inserts the iron sheet pile The steel sheet pile protrudes from the surface including the plate surface of the iron sheet pile when the steel sheet pile is inserted into the ground. And a rotating member that is housed in a plane including the plate surface of the iron sheet pile when pulling out from the ground.

  In a preferred embodiment of the present invention, the rotating member includes a plurality of first steel pipes welded at a predetermined interval to a distal end portion in the insertion direction of the iron sheet pile, a second steel pipe to which a rod-like body is fixed, A strut for disposing the second steel pipe between the first steel pipe, penetrating the first steel pipe and the second steel pipe, and attaching the second steel pipe to the iron sheet pile via the first steel pipe in a rotatable manner; The stopper is attached to both ends of the support and has a stopper for preventing the support from being detached from the first steel pipe and the second steel pipe.

  In a further preferred embodiment of the present invention, the rod-shaped body is formed with a tapered surface that is inclined in the insertion direction of the iron sheet pile in a state where the rod-shaped body is rotated so as to protrude from the surface including the plate surface of the iron sheet pile. It is characterized by that.

  In a further preferred aspect of the present invention, the rotating member is provided over the entire length of the distal end portion in the insertion direction of the iron sheet pile.

  In a further preferred aspect of the present invention, the locking portion is attached to the central portion at the distal end in the insertion direction on the plate surface of the iron sheet pile.

  In a further preferred aspect of the present invention, a guide member for passing the insertion column along the plate surface of the iron sheet pile is further provided.

  Further, in order to solve the above problems, the method for inserting an iron sheet pile according to the present invention includes placing a plurality of support pillars in the ground at predetermined intervals, engaging the iron sheet pile as described above, and engaging the tip with the engaging portion. Stop and attach the insertion column, insert the steel sheet pile to the specified depth in the ground by pushing the insertion column into the ground so that both sides of the steel sheet pile are guided by the support column, and the buried iron sheet pile It is characterized by pulling out the insertion column while leaving it inside.

  And in order to solve the said subject, the insertion method of the iron sheet pile of this invention excavates a some 1st vertical hole in the ground at predetermined intervals, inject | pours hardening material into a 1st vertical hole, and a support pillar , Drill a second vertical hole between the first vertical holes, inject a hardening material into the second vertical hole, and attach the insertion pillar by locking the tip to the locking part on the iron sheet pile described above The steel sheet pile is inserted into the second vertical hole so that both sides of the steel sheet pile are guided by the support pillar, thereby inserting the steel sheet pile to a predetermined depth in the ground, leaving the buried iron sheet pile in the ground. And the insertion column is pulled out.

  According to the present invention, the following effects can be obtained.

  That is, according to the present invention, when the steel sheet pile is inserted into the ground, the rod-shaped body of the rotating member attached to the distal end portion in the insertion direction protrudes from the surface including the plate surface of the iron sheet pile, thus cutting the ground. Friction between the sheet surface of the iron sheet pile and the ground when the iron sheet pile is inserted is reduced, and the iron sheet pile can be smoothly inserted into the ground.

  Further, according to the present invention, if a taper surface inclined in the insertion direction of the iron sheet pile is formed in a state in which the rod-like body is rotated so as to protrude from the surface including the plate surface of the iron sheet pile, The cutting resistance of the ground becomes smaller, and the steel sheet pile can be inserted into the ground more smoothly.

  Further, according to the present invention, when the iron sheet pile is pulled out, the rotating member 40 is stored in a plane including the plate surface of the iron sheet pile. The sheet pile can be pulled out smoothly.

  Hereinafter, the best mode for carrying out the present invention will be described more specifically with reference to the drawings. Here, in the accompanying drawings, the same reference numerals are given to the same members, and duplicate descriptions are omitted. In addition, since description here is the best form by which this invention is implemented, this invention is not limited to the said form.

  1 is a front view showing an iron sheet pile according to an embodiment of the present invention together with a main pile and a lead pile, FIG. 2 is a rear view of FIG. 1, and FIG. 3 is a rotating member and a locking part attached to the iron sheet pile. 4 is a sectional view taken along line AA in FIG. 1, FIG. 5 is a sectional view showing a part of FIG. 4 in an enlarged manner, and FIG. 6 is taken along line BB in FIG. 7 is a cross-sectional view showing a part of FIG. 6 in an enlarged manner, FIG. 8 is a cross-sectional view showing a state where the steel sheet pile is fitted into the main pile, and FIG. 9 shows a rotating member provided on the iron sheet pile. FIG. 10 is a perspective view showing two positions taken by the rotating member of FIG. 9, FIG. 11 is a perspective view showing a part of a process constituting an iron sheet pile insertion method, and FIG. 12 is an iron sheet pile insertion method. FIG. 13 is a perspective view showing a method of inserting an iron sheet pile through FIGS. 11 and 12, 14 is a perspective view showing a method for inserting an iron sheet pile following FIG. 13, FIG. 15 is a perspective view showing a method for inserting an iron sheet pile following FIG. 14, and FIG. 16 is a perspective view showing a drawing of the inserted iron sheet pile. FIG. 18 is an explanatory view showing a rotating member in a state where an iron sheet pile is inserted into the ground and a rotating member in a state in which the iron sheet pile is pulled out from the ground, and FIG. 18 is another embodiment of the present invention. It is explanatory drawing which shows the insertion method of iron sheet piles.

  As shown in FIGS. 1 and 2, the steel sheet pile, that is, the iron sheet pile 10 in the present embodiment, forms an internal space by excavating a part of the ground in order to construct an underground part of a building, for example. , Which is used in mountain retaining work to prevent the ground from collapsing to the excavation side and to support this, and the underground continuous wall is formed by the steel sheet pile 10 and the main pile (support column) 20 which is H-shaped steel. It is formed.

  In other words, the iron sheet pile 10 is guided in the ground by being guided by a main pile 20 that is previously placed in the ground at a predetermined interval and led by a lead pile (insertion pillar) 30 having an H-shaped cross section. Inserted into.

  Such an iron sheet pile 10 protrudes from a surface including the plate surface 10a of the iron sheet pile 10 when the iron sheet pile 10 is inserted into the ground, and is stored in a plane including the plate surface 10a of the iron sheet pile 10 when pulled out. The moving member 40 is attached to the distal end portion in the insertion direction. The details of the rotating member 40 will be described later.

  At the distal end in the insertion direction on the plate surface 10a on one side of the iron sheet pile 10, a locking portion 11 is attached to which the distal end of the lead pile 30 is locked in the insertion direction. For example, the locking portion 11 cuts the angle steel into a predetermined length, or cuts the grooved steel in the length direction and cuts it into a predetermined length, and welds it to the iron sheet pile 10. As shown in FIG. 3, it has a substantially L-shape when viewed from the side, and is attached to the plate surface 10a so as to open toward the rear in the insertion direction. As shown in FIGS. 1 and 4, the locking portions 11 are attached at two places in the short direction with a predetermined interval.

  As shown in FIG. 5, the lead pile 30 is made of iron by fitting one flange 30b so that the web 30a of the lead pile 30 having an H-shaped cross section is positioned between the two engaging portions 11 as described above. Although it is latched by the latching part 11 with respect to the insertion direction of the sheet pile 10, it becomes detachable with respect to the direction opposite to the insertion direction.

  In addition, in this Embodiment, although the latching | locking part 11 is attached to the center part of the insertion direction front-end | tip in the plate surface 10a of the iron sheet pile 10, it may be from back. However, if it is attached to the position shown in the embodiment, a driving force is applied to the tip of the iron sheet pile 10 and the steel sheet pile 10 is inserted into the ground so that no compression force is applied to the iron sheet pile 10.

  As shown in FIG. 1 and FIG. 6, the lead pile 30 is locked to the locking portion 11 at a position about half the full length from the attachment position of the locking portion 11 to the rear in the insertion direction. In this case, a lead pile flange guide (guide member) 12 is provided for passing the flange 30b of the lead pile 30 along the plate surface 10a of the iron sheet pile 10. As shown in FIG. 7, the lead pile flange guide 12 has a substantially L-shaped cross section that sandwiches the flange 30b while avoiding interference with the web 30a of the lead pile 30, and sandwiches the flange 30b from both sides. In order to restrict lateral movement, they are arranged on both sides of the flange 30b.

  Further, as shown in FIGS. 1 and 2, two bolt holes 13 are formed at the center of the rear end of the iron sheet pile 10 in the insertion direction. Bolt holes 31 corresponding to the bolt holes 13 are formed in the lead pile 30. Therefore, by aligning the bolt hole 13 of the iron sheet pile 10 and the bolt hole 31 of the lead pile 30 and bolting them, the lead pile 30 locked by the locking portion 11 and passed through the lead pile flange guide 12 is secured. Is fixed to the iron sheet pile 10.

  As shown in FIGS. 1 and 8, both sides of the steel sheet pile 10 facing in the direction of insertion facing each other guide both sides during insertion with the flange 20a of the main pile 20 placed in the ground interposed therebetween. The parent pile flange guides 14 are provided at three locations.

  As described above, the iron sheet pile 10 protrudes from the surface including the plate surface 10a of the iron sheet pile 10 when the iron sheet pile 10 is inserted into the ground, and within the surface including the plate surface 10a of the iron sheet pile 10 when pulled out. The rotating member 40 to be stored is attached to the distal end portion in the insertion direction.

  As shown in FIG. 9, the rotating member 40 includes a plurality of first steel pipes 41 welded at a predetermined interval to a distal end portion in the insertion direction of the iron sheet pile 10, and a second member to which a rod-like body 43 is fixed. The steel pipe 42 and the second steel pipe 42 are disposed between the first steel pipes 41, penetrate the first steel pipe 41 and the second steel pipe 42, and the second steel pipe through the first steel pipe 41. It has the support | pillar 44 which attaches 42 to the iron sheet pile 10 so that rotation is possible like a hinge. Stoppers 45 are attached to both ends of the support column 44 to prevent the support column 44 from being detached from the first steel pipe 41 and the second steel pipe 42.

  Such a rotating member 40 is rotated with the support 44 as a fulcrum, and as shown in FIG. 10, when the iron sheet pile 10 is inserted into the ground, the rod-shaped body 43 moves the plate surface 10 a of the iron sheet pile 10. When protruding, the rod-like body 43 is stored in the plane including the plate surface 10a of the iron sheet pile 10 (FIG. 10 (b)).

  And, in the rod-like body 43, as shown in the drawing, the insertion direction of the iron sheet pile 10 in a state where the rod-like body 43 is rotated so as to protrude from the surface including the plate surface 10a of the iron sheet pile 10 (FIG. 10A). The taper surface 43a which inclines is formed.

  In addition, in this Embodiment, although the rotation member 40 is provided over the full length of the insertion direction front-end | tip part in the iron sheet pile 10, it may be provided in a part.

  Further, in the present embodiment, three first steel pipes 41 are provided, and thus two second steel pipes 42 disposed between the first steel pipes 41 are provided. The steel pipe 41 may be plural, and may be two or four or more. Therefore, one second steel pipe 42 is provided when there are two first steel pipes 41.

  A method for inserting such an iron sheet pile 10 will be described.

  First, the main pile 20 is driven at a predetermined interval with respect to the excavation area (FIG. 11). In FIG. 11, only two parent piles 20 are shown in order to explain the insertion of one iron sheet pile 10.

  Next, the flange 30b of the lead pile 30 is passed through the lead pile flange guide 12 through the iron sheet pile 10 described above. Then, the lead pile 30 is slid until the tip of the lead pile 30 hits the engaging portion 11, the bolt hole 13 of the iron sheet pile 10 and the bolt hole 31 of the lead pile 30 are aligned and bolted to fix the lead pile 30 to the iron sheet pile. 10 (FIGS. 12A, 12B, and 12C).

  Then, using a heavy machine for pile driving (not shown), the lead pile 30 is pushed into the ground so that both sides of the iron sheet pile 10 are guided by the parent pile 20, and the iron sheet pile 10 is predetermined in the ground. Insert to depth (FIGS. 13A and 13B). That is, the lead pile 30 is gripped by a heavy machine and pushed into the ground, for example, 1 m, and then lifted, for example, by 1 m, and the lead pile 30 is gripped again and pushed into the ground, for example, 1 m. Repeat this as many times as necessary.

  At this time, since the iron sheet pile 10 is pushed into the ground while being guided by the flange 20 a of the parent pile 20 by the parent pile flange guide 14, the iron sheet pile 10 is inserted at an accurate position without being detached from the parent pile 20.

  Further, since the lead pile 30 is locked to the locking portion 11 provided at the tip of the iron sheet pile 10, a driving force is applied to the tip of the iron sheet pile 10 so that the lead pile 30 is inserted into the ground. A compression force is not applied to the iron sheet pile 10, and it does not deform even if it is not high strength.

  And when inserting the iron sheet pile 10 in the ground, as shown to Fig.17 (a), the rod-shaped body 43 of the rotation member 40 attached to the insertion direction front-end | tip part contains the plate surface 10a of the iron sheet pile 10 Therefore, by cutting the ground in contact with the rotating member 40, the friction between the plate surface 10a of the iron sheet pile 10 and the ground when the iron sheet pile 10 is inserted is reduced, and the iron sheet pile 10 is inserted into the ground. Can be done smoothly.

  In the state where the rod-like body 43 is rotated so as to protrude from the surface including the plate surface 10a of the iron sheet pile 10, the tapered surface 43a inclined in the insertion direction of the iron sheet pile 10 is formed. The cutting resistance of the ground becomes smaller, and the insertion of the iron sheet pile 10 into the ground is performed more smoothly.

  When the iron sheet pile 10 is inserted to a predetermined depth in the ground, the bolts fixing the lead pile 30 and the iron sheet pile 10 are removed, and the lead pile 30 is pulled out leaving the buried iron sheet pile 10 in the ground ( FIG. 14 (a)).

  Thereby, as shown in FIG. 15, installation of the iron sheet pile 10 is completed. The underground continuous wall is formed by sequentially performing the insertion of the steel sheet pile 10 between the main piles 20 in which the steel sheet piles 10 are placed. And since an internal space will be formed if the inside of an underground continuous wall is excavated, a predetermined building etc. will be constructed here.

  After constructing a building or the like, as shown in FIG. 16, the iron sheet pile 10 and the parent pile 20 can be removed from the ground. For removal, for example, a heavy machine for pulling out is used.

  When the iron sheet pile 10 is pulled out, as shown in FIG. 17 (b), the rotating member 40 rotates approximately 90 °, and the rod-like body 43 is stored in a plane including the plate surface 10 a of the iron sheet pile 10. Therefore, since the iron sheet pile 10 and the rotation member 40 are linear, during the extraction, the rotation member 40 does not become a resistance to extraction with respect to the ground, and the iron sheet pile 10 can be extracted smoothly.

  By the way, although the case where the iron sheet pile 10 was used for a mountain retaining work was demonstrated above, it can also be used as a water stop wall.

  In this case, as shown in FIG. 18, an auger is used to excavate a plurality of first vertical holes 51 in the ground at a predetermined interval (FIG. 18 (a)). Next, cement milk (hardening material) 52 is injected into the first vertical hole 51 and the parent pile 20 is inserted (FIG. 18B). And the 2nd vertical hole 53 is excavated between the 1st vertical holes 51, and the cement milk 52 is also injected into the 2nd vertical hole 53 (FIG.18 (c)). And it inserts to the predetermined depth in the ground so that both sides of the iron sheet pile 10 may be guided by the main pile 20 by the capacity in the manner described above. At this time, the lead pile 30 is inserted into the second vertical hole 53 (FIG. 18D). Finally, when the lead pile 30 is pulled out while leaving the buried iron sheet pile 10 in the ground (FIG. 18 (e)), the cement milk 52 is solidified in such a manner that the parent pile 20 and the iron sheet pile 10 are rolled up. Water no longer leaks from the gap between 20 and the iron sheet pile 10, and a water blocking wall is formed (FIG. 18 (f)).

It is a front view which shows the iron sheet pile which is one embodiment of this invention with a main pile and a lead pile. It is a rear view of FIG. It is a side view which shows the rotation member attached to the iron sheet pile, and a latching | locking part. It is sectional drawing along the AA line of FIG. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing along the BB line of FIG. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which shows the fitting state of the iron sheet pile with respect to a parent pile. It is a perspective view which shows the rotation member provided in the iron sheet pile. It is a perspective view which shows two positions which the rotation member of FIG. 9 takes. It is a perspective view which shows a part of process which comprises the insertion method of an iron sheet pile. It is a perspective view which shows another part of process which comprises the insertion method of an iron sheet pile. It is a perspective view which shows the insertion method of the iron sheet pile through FIG. 11 and FIG. It is a perspective view which shows the insertion method of the iron sheet pile following FIG. It is a perspective view which shows the insertion method of the iron sheet pile following FIG. It is a perspective view which shows extraction of the inserted iron sheet pile. It is explanatory drawing which shows the rotation member in the state in which the iron sheet pile is pulled out from the underground in the state in which the iron sheet pile is inserted in the ground. It is explanatory drawing which shows the insertion method of the iron sheet piles which are other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Iron sheet pile 10a Board surface 11 Locking part 12 Lead pile flange guide 13 Bolt hole 14 Parent pile flange guide 20 Parent pile (support pillar)
20a Flange 30 Lead pile (insertion pillar)
30a Web 30b Flange 31 Bolt hole 40 Rotating member 41 First steel pipe 42 Second steel pipe 43 Bar-shaped body 43a Tapered surface 44 Post 45 Stopper 51 First vertical hole 52 Cement milk (hardening material)
53 Second vertical hole

Claims (8)

An iron sheet pile that is guided by support pillars on both sides and inserted into the ground,
A locking part that is attached to a predetermined position of the iron sheet pile, and the tip of an insertion column for inserting the iron sheet pile is locked with respect to the insertion direction;
Provided at the tip of the iron sheet pile in the insertion direction, when inserting the iron sheet pile into the ground, it protrudes from the surface including the plate surface of the iron sheet pile, and when pulling out the iron sheet pile from the ground, the plate surface of the iron sheet pile A rotating member stored in a plane including:
An iron sheet pile characterized by comprising: The rotating member is
A plurality of first steel pipes welded at a predetermined interval to a distal end portion in the insertion direction of the iron sheet pile;
A second steel pipe to which a rod-like body is fixed;
The second steel pipe is disposed between the first steel pipes, penetrates through the first steel pipe and the second steel pipe, and the second steel pipe is passed through the first steel pipe and the iron sheet pile. A column that is pivotally attached to the
A stopper that is attached to both ends of the column and prevents the column from being detached from the first steel pipe and the second steel pipe;
The iron sheet pile according to claim 1, comprising: In the rod-shaped body,
The taper surface which inclines in the insertion direction of the said iron sheet pile in the state rotated so that the said rod-shaped body might protrude from the surface containing the plate surface of the said iron sheet pile was formed. Iron sheet pile.   The iron sheet pile according to any one of claims 1 to 3, wherein the rotating member is provided over the entire length of the distal end portion in the insertion direction of the iron sheet pile.   The iron sheet pile according to any one of claims 1 to 4, wherein the locking portion is attached to a central portion at a distal end in the insertion direction on the plate surface of the iron sheet pile.   The iron sheet pile according to any one of claims 1 to 5, further comprising a guide member that passes the insertion column along a plate surface of the iron sheet pile. A plurality of support pillars are placed in the ground at predetermined intervals,
To the steel sheet pile according to any one of claims 1 to 6, the insertion column is attached by locking the tip to the locking portion,
Inserting the iron sheet pile to a predetermined depth in the ground by pushing the insertion pillar into the ground so that both sides of the iron sheet pile are guided by the support pillar,
Pulling out the insertion post, leaving the buried iron sheet pile in the ground,
A method for inserting an iron sheet pile characterized by the above. Drilling a plurality of first vertical holes in the ground at predetermined intervals;
Injecting a hardener into the first vertical hole and inserting a support post;
Drilling a second vertical hole between the first vertical holes;
Injecting a curing material into the second vertical hole,
To the steel sheet pile according to any one of claims 1 to 6, the insertion column is attached by locking the tip to the locking portion,
Inserting the iron sheet pile to a predetermined depth in the ground by inserting the insertion pillar into the second vertical hole so that both sides of the iron sheet pile are guided by the support pillar,
Pulling out the insertion post, leaving the buried iron sheet pile in the ground,
A method for inserting an iron sheet pile characterized by the above.

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