JP3018921B2 - Earth retaining method and earth retaining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil retaining method used for digging work for burying pipes and the like and a soil retaining device used for the method.

[0002]

2. Description of the Related Art In a conventional earth retaining method, a lightweight steel sheet pile is erected in an excavation groove constructed in the ground, and then the steel sheet pile is pressed or driven into the bottom of the excavation groove. He went inside, provoked, and attached cutting beams in sequence.

[0003] However, in the earth retaining work in this excavation trench,
Workers were at risk of disaster due to collapse of the excavation wall.

In order to solve this problem, Japanese Unexamined Patent Publication (Kokai) No. 4-297614 has been developed as an earth retaining method and an earth retaining material which does not require earth retaining work in an excavation trench.

In the earth retaining method and the earth retaining material described in the publication, a pair of opposed flaring materials are first detachably supported on a suspending member suspended from a suspending member, and each of the convex members is detachably supported. Soil retaining material, with a girder jack inserted between them, is suspended in the excavation trench, steel sheet piles are inserted between the excavation trench wall and each bulging material, and then press-fitted. The cutting beam jack is extended by operation and pressed against the protruding material, and then the engagement between each protruding material and the suspending member is released, and the suspending member and the suspending member are lifted. .

[0006]

However, the above-mentioned Japanese Patent Application Laid-Open No.
The earth retaining method and the earth retaining material described in Japanese Patent No. 297614 also have the following problems.

[0007] Efficiency is extremely poor when only a pair of belly members and a girder jack are installed at a time, and two-stage girder (and girder) are required.

The flared material and the joist jack constitute a square plane, but are structurally unstable against out-of-plane forces on that plane.

[0009] When extending the cutting beam jack, it is dangerous to attach a hose connected to the hydraulic pump to the water inlet of the cutting beam jack, so that the operator must lean out into the excavation groove, which is dangerous. is there.

[0010] When the support is removed, a complicated disassembling operation such as releasing the engagement between the belly member and the suspension member is required.
In addition, the time to remove the shoring is different from the time to remove the timber, steel sheet pile and girder, and it takes two times.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an earth retaining method capable of safely and efficiently executing earth retaining work from the ground and an earth retaining device used for the method. The purpose is.

[0012]

The earth retaining method according to the present invention comprises:
A pair of front and rear suspension jigs, which are passed in the width direction of the excavation groove, and a pair of left and right, front and rear, each of which has an upper end slidably connected in the width direction of the excavation groove with respect to each suspension jig With two pairs of vertical members, left and right prongs arranged in two vertical stages between the front and rear vertical members, and expandable and contractible disposed in two vertical stages between the left and right vertical members corresponding to the prominence In the assembled state, an earth retaining device consisting of a cutting beam jack and forming a rectangular parallelepiped frame by these vertical members, protruding, and cutting beam jack is assembled.
It is suspended as a unit in the excavation groove via a suspension jig , a sheet pile is erected between the groove wall of the excavation groove and the bulge of the soil retaining device, and after being press-fitted or driven into the bottom of the excavation groove, the beam is cut off. The jack is stretched and the prong is pressed against the sheet pile to resist earth pressure.

[0013] Since the vertical members, the uprights, and the cut-off jacks form a rectangular parallelepiped frame, they are structurally stable, and can be hung in the excavation trench as a unit assembled on the ground. Even after the laying of the buried pipe, the cutting beam jack can be shrunk without disassembly and lifted as one piece to the ground.

[0014] Further, since the apparatus includes the upper and lower two-stage bulging and the cutting beam jack, it is possible to efficiently cope with the case where the two-stage bulging is required.

Regarding the laying of buried pipes and the like in excavation trenches, as described above, the cutting beam jack is extended, and the bulge is pressed against the sheet pile to resist the earth pressure, and a safe state is established. Workers can enter the excavation trench, perform necessary operations such as hanging and lowering the pipe, connecting and welding the pipe, and the overall construction is highly safe.

The earth retaining支保apparatus of the present invention is a device for use in the earth retaining method, the hanging jig consists longitudinal pair of beam members that are passed to the excavation width direction, respectively for each lifting jigs A pair of left and right vertical members with the upper end slidably connected in the width direction of the excavation groove, two pairs of vertical members in front and rear, and two vertical members between front and rear vertical members
It consists of left and right prongs arranged in steps, and stretchable cutting beam jacks arranged in two steps up and down between left and right vertical members corresponding to this prominence. It is characterized in that a rectangular parallelepiped frame is formed by cutting beam jacks.

As the cutting beam jack, for example, a hydraulic jack such as a hydraulic jack or a hydraulic jack can be used. In this case, a hose connecting the water inlet of the hydraulic jack and a pump on the ground is connected to the earth retaining device. By attaching a hose to the water inlet of the fluid pressure jack when assembling the earth retaining device on the ground, the worker can lean on the ground without digging into the excavation groove during construction. Can be operated to expand and contract the cutting beam jack.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1 and 2 show an assembled state of an embodiment of the earth retaining device according to the present invention.

The earth retaining device 1 includes a pair of front and rear hanging jigs 2 which are passed in the width direction of the excavation groove, and a pair of right and left suspension jigs which are slidably connected to each of the hanging jigs 2 in the width direction of the excavation groove. Two pairs of vertical members 3, left and right prongs 4 arranged in two vertical stages between the front and rear vertical members 3, and two vertical columns between the left and right vertical members 3 corresponding to the prongs 4. The extensible cutting beam jack 5.

According to the above-described structure, the vertical member 3, the belly 4 and the cutting beam jack 5 form a rectangular parallelepiped frame which is suspended and supported by the suspending jig 2, and assembled on the ground to form the suspending jig 2. It can be hung in the excavation groove as a single unit, and can also be hung in the state of a rectangular parallelepiped frame when hung on the ground again.

In assembling on the ground, first, the vertical member 3 and the cutting beam jack 5 (in this embodiment, a hydraulic jack is used as the cutting beam jack 5) are connected by connecting pins 6. At this time, the assembling is performed so that the water inlet 7 of the cutting beam jack 5 is directed upward, and the connection pin 6 is inserted into the pin hole of the receiving portion of the vertical member 3 from above. After the connection, the split pin 8 is inserted below the connection pin 6 to prevent the connection pin 6 from coming off.

Next, the hose 9 attached to the vertical member 3 is connected to the water inlet 7 of the cutting beam jack 5.

Subsequently, the vertical member 3 and the hanging jig 2 are
Connect with. The suspension jig 2 in this embodiment is a beam member having a hook 11 for lifting in the center, and a long groove 12 for passing the bolt 10 is formed at a connection position with the vertical member 3. On the other hand, a bolt hole 14 is provided at the upper end of the vertical member 3.
A receiving portion 13 having a U-shaped cross section and having an upward opening is formed, and the hanging jig 2 is placed on the receiving portion 13 and the bolt 10
By connecting with, when the cutting beam jack 5 is expanded and contracted,
The bolt 10 slides in the long groove 12 and enables the vertical member 3 to slide in the excavation groove width direction with respect to the hanging jig 2.

As described above, the front and rear units α and β composed of the hanging jig 2, the vertical member 3 and the cutting beam jack 5 are assembled. By connecting the work 4 to the longitudinal member 3 with the bolt 15, the soil retaining device 1 constituting a rectangular parallelepiped frame is completed.

FIGS. 3 to 7 show construction steps in one embodiment of the earth retaining method of the present invention using the earth retaining device 1, and work is performed in the following procedure.

The excavation groove 3 is formed on the ground 31 by the backhoe 21.
2 is excavated (see FIG. 3).

The retaining device 1 assembled on the ground to a width slightly smaller than the groove width is hung in the excavation groove 32 (see FIG. 4).

The bulge 4 and the excavation trench 3 of the earth retaining device 1
The steel sheet pile 22 is erected between the inner wall 2 and the inner wall 2 and press-fitted or driven (see FIG. 5).

Hose 9 extending from the water inlet to the ground
Accordingly, the cutting beam jack 5 of the earth retaining device 1 is extended by operating the worker without leaning into the excavation groove 32, and the steel sheet pile 22 is crimped through the belly 4 to press the excavation groove 32. To support the earth pressure and the groundwater pressure applied to the ditch wall (Fig. 6
reference).

After the pipe 23 is buried, the steel sheet pile 22 and the earth retaining device 1 are removed without disassembly (see FIG. 7).

[0032]

According to the invention of the present application, the vertical members, protruding portions, and cutting beam jacks of the earth retaining device form a rectangular parallelepiped frame, so that they are structurally stable and assembled on the ground. Can be integrally suspended in the excavation trench, and after the laying of the buried pipe, the cutting beam jack can be shrunk without disassembly and lifted as one unit to the ground, and the workability is good.

[0033] Since it is provided with upper and lower two-stage bulging and a cutting beam jack, when two-stage bulging is required,
Can be dealt with efficiently.

When laying a buried pipe or the like in an excavation trench, a cutting beam jack is extended, and a bulge is pressed against a sheet pile to resist earth pressure. It is possible to perform necessary work such as hanging down the pipe, connecting and welding the pipe, and the safety is high.

A hydraulic jack is used as the cutting beam jack, and a hose connecting the water inlet of the hydraulic jack and the ground pump is attached to a vertical member of the earth retaining device, and the hydraulic pressure is set when the earth retaining device is assembled on the ground. By connecting a hose to the jack's water inlet, workers can extend and retract the girder jack from the ground without having to lean into the excavation groove during construction, which is also highly safe.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a soil retaining device of the present invention.

FIG. 2 is a cross-sectional view in the width direction of the excavation groove of the earth retaining device corresponding to the embodiment of FIG. 1;

FIG. 3 is a sectional view showing an embodiment of a retaining direction according to the present invention.

FIG. 4 is a sectional view showing a construction procedure following FIG. 3;

FIG. 5 is a sectional view showing a construction procedure following FIG. 4;

FIG. 6 is a sectional view showing a construction procedure following FIG. 5;

FIG. 7 is a sectional view showing a construction procedure following FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Soil supporting device, 2 ... Hanging jig, 3 ... Vertical member, 4 ... Belly up, 5 ... Cut beam jack, 6 ... Connection pin, 7 ... Water inlet, 8
... split pin, 9 ... hose, 10 ... bolt, 11 ... hook, 12 ... long groove, 13 ... receiving part, 14 ... bolt hole, 15 ...
Bolt, 21: Backhoe, 22: Steel sheet pile, 23: Buried pipe, 31: Ground, 32: Excavation groove

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-98645 (JP, A) JP-A-4-297614 (JP, A) JP-A-3-50629 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) E02D 17/08

Claims (3)

(57) [Claims] 1. A pair of beads before and after passing in a width direction of a digging groove.
A hanging jig consists arm member, whereas each of the lifting jig
A pair of right and left with the upper end slidably connected in the width direction of the excavation groove,
Two pairs of longitudinal members in front and back, left and right prongs arranged in two vertical steps between front and rear longitudinal members, and expandable and contractible disposed in two vertical steps between left and right vertical members corresponding to the prominence The earth retaining device, which comprises a vertical frame, a bulge, and a rectangular parallelepiped frame formed by the cutting beam jack, is integrally assembled in the excavation groove via the hanging jig . The pile is erected between the groove wall of the excavation groove and the ridge of the retaining device, and the sheet pile is press-fitted or driven into the bottom of the excavation groove. An earth retaining method, wherein a belly is pressed against the sheet pile to resist earth pressure. 2. A pair of beads before and after passing in the width direction of a digging groove.
A hanging jig consists arm member, whereas each of the lifting jig
A pair of right and left with the upper end slidably connected in the width direction of the excavation groove,
Two pairs of longitudinal members in front and back, left and right prongs arranged in two vertical steps between front and rear longitudinal members, and expandable and contractible disposed in two vertical steps between left and right vertical members corresponding to the prominence An earth retaining device, comprising: a vertical cutting frame jack; and a vertical rectangular parallelepiped frame formed by the vertical member, the belly, and the cutting beam jack. 3. The cutting beam jack is a hydraulic jack,
The retaining device according to claim 2, wherein a hose connecting a water inlet of a fluid pressure jack and a pump on the ground is attached to the vertical member.