JP2023077355A - Earth retention timbering - Google Patents

Abstract

To provide earth retention timbering allowing sand and pebble and the like to be prevented from flying from a gap between sheet piles as much as possible and allowing overturn upon assembly operation to timbering of the sheet piles to be prevented as much as possible.SOLUTION: Earth retention timbering in accordance with the present invention is configured with: a pair of upper and lower lateral members; wale units comprising a quadrilateral frames having a plurality of vertical members connecting the upper and lower lateral members to each other as well as being configured with a sheet pile guide frame guiding the sheet plate in a vertical direction; and struts installed between each of the lateral members of the wale units opposite to each other, wherein the sheet pile guide frame comprises an outer plate parallel to a longitudinal direction of the wale unit and a separating plate generally parallel to an oblique angle to an end edge of the pile plate. And a lateral member is provided with a falling-down prevention tool one end of which is engaged thereon and the other end of which is placed to the ground.SELECTED DRAWING: Figure 1

Description

The present invention relates to earth retaining works for excavated trenches.

As a method for excavating trenches, especially small trenches with an excavation depth of about 1 to 3m, the earth retaining shoring is submerged in a temporarily excavated trench (pre-drilled trench) and then suspended in mid-air. A locking part is provided on the upper part of the earth retaining shoring, and this locking part is hooked to the groove to prevent the earth retaining shoring from falling, and a sheet pile is provided between this earth retaining shoring and the earth wall. There is a method in which the sheet pile is slipped down to the bottom of the pre-drilled ditch, and then the bottom of the ditch is further dug and the sheet pile is pushed in.

In this construction method, the lower part of the sheet pile cannot be excavated by machine, so that part must be gradually excavated by hand. Doing so may result in injury.

In order to eliminate this manual digging work, the sheet piles are combined with the earth retaining shoring and then submerged in the pre-drilled ditch. There is a way to drop it down to the bottom of the dug-down ditch.

The earth retaining shoring 500 used in this method includes, for example, a pair of left and right waling units 200 each provided with a sheet pile guide frame 300 for vertically guiding the sheet pile 100 on the outside, and a strut 400. In each figure, U indicates an upward direction, D indicates a downward direction, R indicates a right direction, and L indicates a left direction.

As shown in FIG. 7, each wale unit 200 is constructed of a quadrilateral frame comprising a pair of upper and lower horizontal members 202 and a plurality of vertical members 201 connecting the upper and lower horizontal members 202 together.

As shown in FIG. 6, the sheet pile guide frame 300 includes an outer plate 301 that entirely covers the left and right widths of the horizontal member 202, and a connecting plate that connects the left and right ends of the outer plate 301 to the left and right ends of the horizontal member 202. 302, and partition plates 303 provided on the inner surface of the outer plate 301 with appropriate intervals in the vertical direction.

A threaded hole (not shown) is formed at a predetermined height in the sheet pile 100 inserted between the outer plate 301 and the lateral member 202, and while the pre-drilled groove is dug down to the depth of the excavated groove, for example, as shown in FIG. A sheet pile stopper 101 composed of a butterfly bolt or the like is inserted into the screw hole, and the sheet pile stopper 101 is received by the outer plate 301 from below, thereby preventing the sheet pile 100 from falling.

Japanese Utility Model Laid-Open No. 06-067541 JP 2003-253674 A

The inventions disclosed in Patent Literatures 1, 2, etc., combine the sheet piles and then sink them into the pre-drilled groove, as in the earth retaining shoring 500 shown in FIG. , it is possible to dig down the bottom of the groove, which contributes to the safety of the work.

However, as described above, as shown in FIG. 6A, since the partition plate 303 is provided on the inner surface of the outer plate 301 in the vertical direction, as shown in FIG. A gap 102 is generated between the ends of the tape. In addition, the gap 102 in the drawing is painted out for easy identification.

If such a gap 102 exists, sand, pebbles, and the like may fly into the excavated groove from the gap 102 . In particular, if the partition plate 303 is provided in a direction perpendicular to the outer plate 301, when sand, pebbles, etc., come flying, there will be no obstacles and they will fly without being decelerated. Very dangerous for workers.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an earth retaining shoring that is capable of suppressing as much as possible sand, pebbles, and the like from flying through gaps between sheet piles.

In addition, when adopting the method of combining the sheet pile with the earth retaining shoring described in the Background Art section and submerging it in the pre-drilled ditch, and then digging down the ditch bottom while holding the sheet pile on the earth retaining shoring, The work of assembling the sheet piles in the sheet pile guide frame is carried out on the ground beside the excavation ditch. In such work, if the sheet pile is long, there is a risk that the earth retaining shoring will topple over due to the weight of the sheet pile.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an earth retaining shoring capable of suppressing as much as possible the overturning of sheet piles on the ground when they are combined with the shoring.

The configuration of the present invention for achieving the above object is as follows.

(1) The earth retaining shoring according to claim 1 is composed of a quadrilateral frame consisting of a pair of upper and lower horizontal members and a plurality of vertical members connecting the upper and lower horizontal members, and the horizontal members An earth retaining shoring structure comprising a waling unit provided with a sheet pile guide frame for guiding a sheet pile in the vertical direction on the outside, and a strut erected between each horizontal member of the facing waling unit, wherein the sheet pile guide The frame was composed of an outer plate parallel to the longitudinal direction of the wale and a partition plate substantially parallel to the inclination angle of the edge of the sheet pile.

(2) In the earth retaining shoring described in claim 2, in the invention described in claim 1, both ends of the horizontal member in the longitudinal direction are parallel to the partition plate and configured in a straight line.

(3) The earth retaining shoring described in claim 3 is, in the invention described in claim 1, provided with an overturning prevention jig whose one end is locked to the horizontal member and whose other end is grounded.

(4) In the earth retaining shoring described in claim 4, in the invention described in claim 3, the overturn prevention jig is configured to be extendable.

How the present invention configured as described above works to solve the problems will be outlined with reference to the drawings.

FIG. 5A is a plan view of the wale unit 20 equipped with the sheet pile 100. FIG. The partition plate 32 that constitutes the sheet pile guide frame 30 is provided in a manner inclined substantially parallel to the inclination angle of the end portion 103 of the sheet pile 100 . Therefore, if the distance between the adjacent partition plates 32 is set to approximately the width of the sheet pile 100, no gap is generated between the adjacent sheet piles 100 as shown in FIG. 5B.

In other words, it is possible to prevent sand, pebbles, and the like from flying through the gaps between the sheet piles, as in the conventional example.

Further, even when the width of the sheet pile 100 is slightly smaller than the distance between the adjacent partition plates 32 and a small gap is generated between the adjacent partition plates 100, since the partition plates 32 are inclined, the soil pressure As a result, sand and pebbles that fly from the sheet piles substantially perpendicularly to the sheet piles come into contact with the partition plate 32, and the flying speed is reduced. In other words, the danger to workers working in the excavated trench is reduced.

In the earth retaining shoring according to claim 2, as shown in FIG. 2, both ends of the horizontal member 22 in the longitudinal direction are arranged in parallel with the partition plate 32 and in a straight line. Therefore, even when the earth retaining shoring 1 is used continuously as shown in FIG. 9, no gap is generated between the ends of the earth retaining shoring 1, and sand and pebbles can be prevented from flying. It becomes.

As shown in FIG. 4, the earth retaining shoring according to claim 3 is provided with a tipping prevention jig 40 whose one end is engaged with the horizontal member 22 and whose other end is grounded. This overturn prevention tool 40 serves as a support, and even if sheet piles are loaded into the sheet pile guide frame 30, it is possible to prevent the earth retaining shoring 1 from overturning.

In the fourth aspect of the invention, the overturn prevention tool 40 is configured to be extendable. With such a configuration, even when the ground near the excavation ditch is not flat, it is possible to install the leg plate 41 on the ground by extending and contracting the overturn prevention tool 40, and the sheet pile 100 can be placed in the sheet pile guide frame 30. This increases the easiness of the work of combining.

Perspective view of the invention according to claim 1 Same, plan view Explanatory drawing showing the state of use of the conventional example Perspective view of earth retaining shoring according to claim 3 or 3 A Plan view of wale unit with sheet pile installed B Plan view of the same A Plan view of a conventional wale unit equipped with sheet piles B Plan view of the same Perspective view of conventional example Front view of fall prevention tool Explanatory drawing showing the implementation state of the present invention

Preferred embodiments of the invention are outlined below with reference to the drawings. It should be noted that the embodiments of the constituent elements of the present invention are not limited to the following embodiments, and can take various forms as long as they fall within the technical scope of the present invention.

As shown in FIG. 1, the earth retaining shoring 1 according to claim 1 comprises a quadrilateral frame comprising a pair of upper and lower horizontal members 22 and a plurality of vertical members 21 connecting the upper and lower horizontal members 22 together. In addition, a wale unit 20 provided with a sheet pile guide frame 30 for guiding the sheet piles in the vertical direction outside the horizontal members 22, and a cut constructed between the horizontal members 22 of the opposing wale units 20. beam 50.

As shown in FIG. 1, the earth retaining shoring 1 is assembled into a box shape when in use, and is dismantled for each waling unit 20 when not in use. In the figure, the case where the struts 50 are erected between both ends of the horizontal members 22 or in the vicinity thereof is shown. In addition, the struts 50 may be erected in the middle part including both ends. Square steel pipes or the like are used for the vertical members 21 and the horizontal members 22 .

As shown in FIG. 2 , the sheet pile guide frame 30 connects the outer plate 31 that entirely covers the vertical width of the horizontal member 22 and the upper and lower ends of the outer plate 31 to the upper and lower ends of the horizontal member 22 . In addition, a partition plate 32 is provided on the inner surface of the outer plate 31 with an appropriate interval in the left-right direction. The distance between the partition plates 32 is approximately the same as the width of the sheet pile.

A cut plate or the like is used for the outer plate 31 and the partition plate 32 .

The struts 50 are telescopic ones with built-in hydraulic cylinders.

As shown in FIG. 8, the overturn prevention tool 40 according to the third or fourth aspect of the invention comprises a cylindrical body 42, a cylindrical body 43 sliding inside the cylindrical body 42, and the lower end of the cylindrical body 43. a pair of plates 44 provided on the upper front and rear sides of the cylindrical body 42; a cotter 45 attached to the plate 44; and a locking member 46 connected to the upper end of the plate 44. Consists of If the overturn prevention device 40 is not telescopic, a simple rod-shaped member may be used without using the cylindrical body 42 or the columnar body 43 .

A pair of plates 44 . . . provided on the front side and the back side in FIG. The pin 44a is loosely inserted into the hole 45a of the cotter 45, and this structure allows the cotter 45 to move vertically.

The locking member 46 is a cut plate bent in an L shape. As shown in FIG. 4, the locking member 46 is locked to the sheet pile guide frame 30, and the cotter 45 is dropped downward to fix the overturn prevention device 40 to the earth retaining shoring 1. As shown in FIG.

In the overturn prevention device 40 according to the fourth aspect of the invention, the cylindrical body 43 slides inside the cylindrical body 42, so that the overturn prevention device 40 can be expanded and contracted. At this time, although not shown, a through hole may be provided in each of the tubular body 42 and the cylindrical body 43, and a pin may be inserted into the through hole so that the overturn prevention tool can be fixed to a predetermined length. Alternatively, by providing a thread groove on the inner peripheral surface of the cylindrical body 42 and providing a screw on the outer peripheral surface of the cylindrical body 43 and screwing them together, the overturn prevention tool can be fixed to a certain length. good.

Reference Signs List 1 Earth retaining shoring 20 Wing unit 21 Vertical member 22 Horizontal member 30 Sheet pile guide frame 31 Outer plate 32 Partition plate 40 Overturn prevention tool 41 Leg plate 42 Cylindrical body 43 Cylindrical body 44 Plate 45 Cotter 46 Locking member 50 Strut

Claims (4)

It is composed of a quadrilateral frame consisting of a pair of upper and lower horizontal members and a plurality of vertical members connecting the upper and lower horizontal members, and a sheet pile guide frame is provided outside the horizontal members to guide the sheet piles in the vertical direction. An earth retaining shoring structure comprising a waling unit and a strut erected between each horizontal member of the facing waling unit,
An earth retaining shoring in which a sheet pile guide frame is composed of an outer plate parallel to the longitudinal direction of a wale and a bulkhead plate substantially parallel to the inclination angle of the edge of the sheet pile. 2. An earth retaining shoring according to claim 1, wherein both ends of the horizontal member in the longitudinal direction are provided in parallel with the partition plate and in a straight line. 3. An earth retaining shoring according to claim 1 or 2, further comprising an overturning prevention jig, one end of which is locked to the horizontal member and the other end of which is grounded. An earth retaining shoring according to claim 3, wherein the overturn prevention jig is extendable.

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