JPH08260465A - Sheathing unit for ditch excavation and the like - Google Patents

Abstract

PURPOSE: To press in sheet piles regularly in a straight line, and to prevent the generation of construction environmental pollution by linking a pushing-in and drawing device far the sheet piles with the sheet piles for a chamber plate through a rack and a pinion mechanism. CONSTITUTION: A sheathing device 1 has mutually parallel chamber plates 3 maintained by two struts 2, and the struts 2 are expanded and contracted by jacks, and change the space of the sheathing device 1. Each chamber plate 3 is composed of sheathing plates 9 on the drive ditch sides and external walls 10, which are arranged in parallel with the sheathing plates 9 and to which projecting sections guiding sheet piles 6 are welded. Since projections formed on both sides of the corrugated troughs of the sheet piles 6 are constrained by racks fitted to each sheet pile 6, the sheet piles 6 have the two racks arrayed in parallel, but the length of the racks is shorter than the overall length of the piles and the racks are set while being separated from the inserting ends of the sheet piles 6 by approximately one meter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil retaining unit used for trench excavation or similar work.

[0002]

2. Description of the Related Art In a conventional earth retaining unit, a sheet pile is pushed in by the weight and vibration of a vibro hammer, so that noise may be generated, and the soil may be destroyed by an impact and the ground may be disturbed. There was a defect that the sheet pile was not driven straight and the end face was damaged.

[0003]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to obtain an earth retaining unit that does not cause construction pollution by pushing the sheet pile in an orderly and straight manner.

[0004]

The means of the present invention are as follows. Reinforcing member and / or earth retaining device provided with a chamber plate having guides for insertion and extraction of a sheet pile that supports a side wall of a groove, and a pushing and pulling device for the sheet pile. And the push-pull device is a soil retaining unit for trench excavation that is connected to the sheet pile of the chamber plate through the rack and pinion mechanism.

[0005]

[Embodiment] A case where a soil retaining device is used will be described.

Reference numeral 1 in FIG. 1 is an earth retaining device, which is provided with a chamber plate 3 (FIGS. 1 and 2) which is maintained in parallel with each other by two cutting beams 2, and the cutting beam 2 is extended and contracted by a jack. Then, the interval of the earth retaining device 1 is changed.

The earth retaining device 1 is set in a pre-drilled excavation groove and then supported by a side wall. In the partition space 5 formed in each chamber plate 3, the sheet pile 6 is penetrated and the pipe 8 is embedded in order to support the side wall of the groove excavated along the groove excavated in advance.

Each chamber plate 3 comprises an earth retaining plate 9 on the side of the excavation groove and an outer wall 10 welded with a convex portion 11 arranged parallel to the soil retaining plate 9 and guiding the pile 6. U that can be used for transportation on each end side surface
The U-shaped shoe 12 is applied, and the U-shaped shoe 12 is used to push in and attach the connecting portion 13 of the pulling device 14 (FIGS. 4 and 5) to the earth retaining device 1. Further, the connecting portion 13 is tightened with a stopper bolt 15 having a plug shape (FIG. 6).

The push-in / pull-out device 14, which is vertically aligned with the chamber plate 3, includes H beams 17, 18,
There are a pair of head plates 16 connected by 19 and 20 (FIG. 7).

Each sheet pile 6 in each drawing is bent in a trapezoidal wave shape, and the release device 22 acts on the front side V within a range where the width of the corrugated trough is larger. This is the holder 24 shown in FIG.
It is formed by a roller 23 attached to the back of the H beam 19, and the rear portion is supported by a small supporting portion 25. The supporting portion 25 is fixed on a deck rail 26 of the H beam 19, and a compression spring 27 (FIG. 6) is acted inside the supporting portion 25, Is loaded in the direction V on the front side of the seat pile 6 and the seat pile 6 is hit against the rear side R (FIG. 8) from the opposite direction to the H beams 17, 1
8 flanges (Fig. 6). The number of release devices 22 is set to match the number of sheet piles 6 used.

Starting from the releasing device 22 and the H beam 17 which are opposed to each other, since there is a guide metal fitting 28 which is adapted to the corrugated trough shown by the broken line and the one-dot chain line in FIG. 5, the pile 6 can be inserted only from that position. . Since the ridges provided on both sides of the corrugated trough are restrained by the racks 29 provided on each pile, the seat pile 6 has two racks 29 arranged in parallel, but the length of the rack 29 is shorter than the total length of the pile. Set the sheet pile 6 about 1 m away from the insertion end. As a result, not only the pushing and pulling device 14,
The sheet pile 6 can be easily inserted into the chamber plate 3. As shown in FIG. 5, the release device 22 is mounted between the racks 29 on both sides of one sheet pile 6.

There is a shaft 30 which pushes within the upper and lower H beams 19, 20 and covers the length of the withdrawing device 14, which pivotally supports a pinion 31 which meshes with the rack 29, and the releasing device 22 in the reference position the rack. The engagement between 29 and pinion 31 is released.

Although not shown, a support plate 32 is attached to the lower beam 20 from a hydraulic motor 33 driven by a hydraulic hose and a hydraulic line coupling from an excavator. Therefore, when the hydraulic circuit of the drive gear is not used for a long time, the excavator is placed in a prominent position in front of the excavation groove. The sprocket 34 is fixed to the shaft of the hydraulic motor 33, and the shaft 30
The chain 36 is put on the sprocket 35 and the sprocket 34, and the pinion 31 is rotated by the motor 33. The rotation direction of the hydraulic motor 33 can be changed by operating the shift lever. The release device 22 faces an interlocking device 37 acting on the rear surface R of the pile 6 and has two double levers 38. The link pins 39 are attached to a bearing plate 40 connected to the H beams 17 and 18, the lever arm 38 '(FIG. 7) rotating in the direction of the pile 6 is provided with a press roll 41, and the other lever arm 38 "is for operation. It corresponds to an end piece. The lever arm 38 ″ is connected to the orthogonal brace 42 and protrudes from the earth retaining device 1, and the compression spring 43 supported by the pocket 44 provided in the H beam 18 acts on the double lever 38 (see FIG. 5). ).

The tooth forms of the pinion 31 and the rack 29 are formed on the tips and the bottoms of the low teeth, and are generated by two adjacent teeth of the involute tooth form consisting of one tooth. Therefore, the gear is theoretically module 3 with a pitch diameter of 234 mm.
It has 78 teeth. As a result, a 26-tooth gear having large teeth with low teeth can be obtained. In addition, the rack has a harmonious shape in consideration of strong rack drive, and pushes the soil that has been bitten into the tooth side surface.

The earth retaining unit 1 can be lowered in its place and the push-in / pull-out device 14 can be plugged into the upper part of the chamber plate 3 by means of a thumbscrew 15 and connected.

Next, the engaging device 3 is used by the excavator of the excavator.
When an orthogonal brace of No. 7 is selected and hit so as to reach the position shown in FIG. 7, the pressing lever 38 of the corresponding double arm rotates against the spring and the pressing roll 41 of each meshing device 37 causes the pressing roll 41 of the corresponding sheet pile. The sheet pile 6 is continuously inserted into the soil in order to surely engage the rack 29 and the pinion 31 of the pile 6 facing the both racks and to move in the intersecting direction. be able to. At this crossing transition, the release device 2
2 is avoided from spring loading. And the sheet pile 6
When the excavator descends into the soil for a considerable length, the excavator excavator is released from the meshing device 37 and the lever 38 is spring-loaded back to the basic position of the stop limit, and the release device 22 is passed through the roller 32. Although the pile 6 is reversed in the cross direction, the rack 29 of the corresponding pile 6 is actually released from the meshing pinion 31 first.

When an obstacle is encountered in the step of inserting the sheet pile 6, the drive can be stopped immediately, and after the obstacle is removed, the meshing device can be moved again to continue the insertion. Push another sheet pile into the soil in the same way.

The rotation direction of the hydraulic motor 33 is changed in order to pull out the sheet pile, and the sheet pile can be pulled out when the sheet pile is attached to the connecting position.

Instead of the wearable rack, for example, a tooth mold made of the same material may be rolled into a pile. [Detailed Description of the Invention]

According to the present invention, the following effects are exhibited. (A) The rack and the pinion can be operated by the hydraulic drive using the power of the excavator with respect to the pushing device, and noise does not occur in the pushing and pulling operations. (B) The chamber plate is used, and the earth retaining device having the width with the guide metal is used for a certain length. Therefore, the sheet pile can be pushed straight into the regular position without disturbing. (C) No extra equipment such as a power engine is required to push in and pull out the sheet pile.

[Brief description of drawings]

FIG. 1 is an overall side view.

FIG. 2 is a partial plan view.

FIG. 3 is a side view of a main part.

FIG. 4 is a front view of a main part.

FIG. 5 is a cross-sectional plan view of a main part.

FIG. 6 VI-V of the engagement device in the released position.
Sectional drawing of I'line.

FIG. 7 is a vertical cross-sectional side view showing a state in which the meshing device is connected.

FIG. 8 is a vertical sectional side view of a pinion drive mechanism and a push-in / pull-out device.

[Explanation of symbols]

 1 Earth retaining unit 3 Chamber plate 6 Sheet pile 14 Pulling device 22 Release device 28 Guide hardware 29 Rack 31 Pinion

Claims (6)

[Claims] 1. An uprising member and / or a soil retaining device having an adjustable stretchable beam and a guide for inserting and extracting a sheet pile supporting a side wall of a groove, and a pushing and pulling device for the sheet pile. And the push-pull device is a soil retaining unit for trench excavation that is connected to the sheet pile of the chamber plate through the rack and pinion mechanism. 2. The earth retaining unit for trench excavations according to claim 1, further comprising a sheet pile in which a rack that engages with a pinion of the pushing and pulling device is vertically arranged. 3. The earth retaining unit for trench excavations according to claim 2, wherein two racks are arranged in parallel to each sheet pile. 4. The earth retaining unit for trench excavations according to claim 1, wherein a lever for pressing the back surface of the sheet pile in a meshing direction is provided in the meshing device. 5. The earth retaining unit for trench excavations according to claim 1, wherein the meshing device is provided at a position for protecting the seat pile and the rack. 6. The earth retaining unit for trench excavations according to claim 1, wherein the rack is detachably attached to the sheet pile.