JPH08128043A - Turning strut for ditch excavation earth retaining - Google Patents

Abstract

PURPOSE: To safely carry out work in civil engineering work by excavating an open channel in a ground, and installing a pair of earth retaining panels, and composing a strut used for spreading a space between a pair of the panels so as to be operated on the ground without workers entrance into the open channel between the panels and releasing and spreading the panels. CONSTITUTION: A piston 31 and a rod 32 stimulatedly energized by a coil spring 33 are internally inserted in a cylinder 30, and when the hydraulic actuation of the piston 31 contracts the coil spring 33 to elongate the rod 32 as much as a fixed stroke for removing the hydraulic pressure, the coil spring 33 elongates and the rod 32 is contracted as much as a fixed stroke. An attaching metallic material 40 attached to a panel 2 and a turning metallic material 20 are severally attached to both the ends of the cylinder 30. The fixing pin 41 of the attaching fitting 40 is drawn out to remove the hydraulic pressure, and the rod 32 is thereby contracted to release a turning strut, and the cylinder 30 horizontally turns with the turning pin 23 of the turning metallic material 20 as a pivot.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel girder for excavating a ditch used for excavating an open channel in the ground in civil engineering work to bury a pipe or construct a structure in a trench. is there.

[0002]

2. Description of the Related Art Conventionally, in the work of digging open pits and burying buried objects, the length and depth required for burial are excavated, and earth retaining panels or sheet piles are attached to the side of the open pits as necessary. Install a screw, jack or hydraulic jack as a beam member between the panels or sheet piles on both sides in the upper and lower stages.
The soil was prevented from collapsing.

[0003] Next, after removing from the upper beam member and refilling work, the buried object is lowered and installed at a predetermined position, and then earth and sand are backfilled to a predetermined place to construct earth retaining equipment. After repatriation and removal at, the rest of the backfill was being constructed.

[0004]

However, the conventional screw or hydraulic jack, which is a gutter for excavation of trenches, not only takes time and labor to stretch or loosen the panel and the upholstery member, but also to solve the problems. When suspending and lowering an embedded object in an open channel, it was dangerous because a person had to enter the open channel or ride on the embedded object to remove the beam.

The present invention has been made in view of the above-mentioned circumstances, and a piston is provided in a cylinder of a swivel beam for excavation in a trench, a rod which is expanded and contracted by being pushed by the piston, and an expansion and contraction stroke is regulated. By incorporating a coil spring that contracts the stroke by releasing pressure, the cylinder and the other assembly panel by removing the pin pivotally connecting the cylinder and one of the assembly panels and the earth retaining material such as a waving material, Provided is a swivel truss for trench excavation earth retaining configured to horizontally rotate about a pin pivotally attached to an earth retaining material such as a waving material.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a cylinder,
A piston inserted in the cylinder and a supply of hydraulic pressure to the piston cause a predetermined stroke extension against the elastic force of the coil spring, and a predetermined stroke contraction by releasing the hydraulic pressure to the piston. A rod, a mounting panel for removably pivotally attaching the rod to one of the assembly panels, an earth retaining material such as a waving material, and a cylinder head on the piston side, which also serves as a cylinder head, and the other assembly panel. And a swivel metal fitting pivotally attached to an earth retaining material such as a waving material so as to be rotatable in the horizontal direction, and the both hardware are detachably fixed to the earth retaining material, respectively. It is a thing.

[0007]

By supplying hydraulic pressure to the piston built in the turning beam, the piston pushes the coil spring for a predetermined stroke and extends the rod. When the hydraulic pressure to the piston is released, the rod expands by the stroke compressed by the coil spring, and the rod contracts a predetermined stroke. The cylinder rotates horizontally around the pin of the revolving metal object.

[0008]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a plan view showing an embodiment of the present invention and shows a cross section taken along the line AA of FIG. FIG. 2 is a side view of FIG.
A B line sectional view is shown. In the figure, 20 is a turning hardware, 30
Is a cylinder, 40 is a mounting metal, and a piston 31 is inserted in the cylinder 30 so that the cylinder 31 slides left and right by the pressure of the liquid supplied through the liquid passage 21. In the state shown in FIG. 1, the piston 3 is resisted against the elastic force of the coil spring 33.
1 has moved to the left end and the rod 32 has expanded. When the hydraulic pressure in the liquid passage 21 is released, the elastic force of the coil spring 33 causes the rod 32 and the piston 31 to move to the position shown in FIG.
Slide to the right as shown in.

At the end of the cylinder 30 on the piston side, a swivel hardware 20 which also serves as a cylinder head is mounted, and the swivel hardware 20 is fixed to the panel 2 via a flexible joint 22 by screwing, pinning, or a cotter. There is. (In the case of this figure, it is fixed to the socket fixed to the panel by tightening the nut.) The turning hardware 20 is rotatable in the horizontal direction by the turning pin 23, and FIG. 3 shows the turned state. The swivel beam 10 of the present invention is stretched at two positions in the longitudinal direction of the panel 2 or the earth retaining material such as a waving material, and is stretched at each position by several steps depending on the depth of the upper or lower two or three steps. It FIG.
Indicates the turning situation of the turning cross beam 10. The flexible joint 22 is provided with flexibility through a cushion rubber 22a (not shown).

The mounting hardware 40 has a pin 32 at the tip of the rod 32.
It is attached at a and is connected to the panel 2 or earth retaining material such as a waving material by a fixing pin 41 inserted from above. Then, the earth retaining material is fixed to the socket by tightening the nut like the turning hardware 20. However, it may be fixed by pinning, cottering, or the like.

Next, the operation of the turning beam of the present invention will be described. In FIG. 1, the hydraulic pressure acts on the piston 31, the lot 32 resists the elastic force of the coil spring 33, and the fixing pin 41 of the mounting hardware 40 is inserted from above in this state with the stroke extended, and the panel 2 or the upholstery material is set in a groove excavation hole (not shown). In this state, the liquid path 2
A hose (not shown) is connected to 1, and a coupler connected to a valve and a supply hose of a hydraulic pump (not shown) is attached to the end of the hose.
Alternatively, it is attached to the upholstery material.

Next, the fixing pin 41 is pulled upward, the supply hose of the hydraulic pump is connected on the ground, and when the liquid in the cylinder 30 is returned to the pump, the elastic force of the coil spring 33 causes the rod 32 to return by the stroke. The tip of the rod 32 fitted to the mounting hardware 40 comes off (FIG. 2). In this state, when a swivel bar is rotated horizontally from the ground as shown in FIG. 3B until it becomes parallel to the excavation side face, a long buried object (not shown) is inserted between the panel 2 and the waving material from above. It does not interfere with hanging.

In order to return the swivel beam 10 to the original position and to stretch the panel 2 or the waving members, the swivel beam 10 is swung by the swivel rod to the state shown in FIG. 3A, and the coupler is provided with a hydraulic pump. When the supply hose is connected and the hydraulic pressure is supplied, the state shown in FIG. 1 is obtained. Therefore, the fixing pin 41 is inserted and fixed from above by the worker on the ground.

Next, a pipe burying operation using the turning beam of the present invention will be described with reference to FIGS. Panels 2, 2
Is about 3 m, and the swivel girders 10 and 10 of the present invention are stretched up and down in two stages as shown in FIG. 4 before and after the panels 2 and 2, and a total of four swivel girders and a pair of panels 2, 2. An assembly panel is composed of 2 and. This assembly panel is prepared on the ground, hoisted by a hydraulic excavator (HE) or a crane as it is, and is hung down in the excavated open channel, and both sides of the panels 2 and 2 are backfilled, and the pipe floor is leveled. To be done.
This state is shown in FIG. Next, as shown in FIG. 5, the detachable beam 1 is set at a predetermined position. The operation of the upper and lower two-step turning beams 10 is performed from the ground, but when operating the removal cutting beam 1, there is no danger because the upper and lower two steps of the turning beams 10 and 10 are already stretched. Next, as shown in FIG. 6, a pipe pedestal (not shown) is set on the panels 2 and 2, and the pipe 4 is placed thereon.

Next, as shown in FIG. 7, the upper turning beam 1
0 is opened and swiveled, and the pipe 4 is lowered to just above the swivel beam 10 in the lower stage. Next, as shown in FIG. 8, the upper turning beam 10 is returned to its original position. Next, as shown in FIG. 9, the lower turning girder 10 is opened and turned, and the pipe 4 is lowered to a position directly above the outer cutting girder 1. Next, as shown in FIG. 10, the lower turning beam 10 is returned. Next, as shown in FIG. 11, the detachment beam 1 is released and pulled up by a rope attached in advance.

Next, as shown in FIG. 12, the pipe 4 is lowered onto the pipe bed 3. Next, as shown in FIG. 13, about 80% of the pipe 4 is backfilled and manually solidified. Next, as shown in FIG. 14, the upper surface of the pipe 4 is backfilled to about 30 cm. Next, as shown in FIG. 15, the lower turning girder 10 is released and the compaction is performed. Next, as shown in FIG. 16, backfilling is performed up to -100 cm above the ground, and compaction is performed. Next, as shown in FIG. 17, the lower turning beam 10 is returned to its original position. Next, pull up the assembly panel (entire panel). Next, backfill to the ground and perform compaction.

[0017]

According to the present invention described in detail above, the following effects are exhibited. (1) Since the upper and lower two-level swivel beams can be loosened and swung from the ground, the worker can work without crawling into the open channel, so that the pipe can be safely buried. (2) By simply releasing the hydraulic pressure in the cylinder, this elastic force causes the rod to contract a predetermined stroke, and by simply supplying hydraulic pressure from the hydraulic pump to the cylinder, the rod extends the predetermined stroke. The work efficiency is improved because the cutting beam is quickly released and tensioned.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, which is taken along line A- of FIG.
A line A section is shown.

FIG. 2 is a side view showing an embodiment of the present invention, which is taken along the line B- of FIG.
It is a B line cross section.

FIG. 3 is a plan view showing an embodiment of the present invention and showing a state in which a turning beam is released and a cylinder is turned parallel to a panel.

FIG. 4 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 5 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 6 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 7 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 8 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 9 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 10 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 11 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 12 is an explanatory diagram showing a process of burying a pipe using the turning beam of the present invention.

FIG. 13 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 14 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 15 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

FIG. 16 is an explanatory diagram showing a process of burying a pipe in which the turning beam of the present invention is used.

FIG. 17 is an explanatory view showing a process of burying a pipe using the turning beam of the present invention.

[Explanation of symbols]

 1 Removal Beam 2 Panel 3 Pipe Floor 4 Pipe 10 Swiveling Beam 20 Swing Hardware 21 Liquid Channel 22 Flexible Joint 22a Cushion Rubber 23 Swiveling Pin 30 Cylinder 31 Piston 32 Rod 32a Pin 33 Coil Spring 34 Key 40 Mounting Hardware 41 Fixed pin

Claims (1)

[Claims] 1. A cylinder, a piston inserted in the cylinder, and a predetermined stroke extension against the elastic force of a coil spring due to the supply of the hydraulic pressure to the piston, so that the hydraulic pressure to the piston is increased. A rod that contracts by a predetermined stroke by pulling it out, a mounting hardware that removably and pivotally attaches the rod to one of the assembly panels, a soil retaining material such as a rising material, and a cylinder head at the cylinder end on the piston side. And a revolving metal fitting pivotally attached to the earth retaining material such as a waving material so as to be rotatable in the horizontal direction. The two metal fittings are detachably fixed to the earth retaining material. A swivel girder for trench excavation, which is characterized by being