JPS6221927A - Excavator for sheathing work - Google Patents

Abstract

PURPOSE:To permit excavation between master piles of a sheathing wall by a method in which many excavating blades are provided to the periphery of an endless band to form an excavator, and the frame of the excavator is connected with the arm of a back hoe, etc. CONSTITUTION:Many excavating blades 21 are provided to the periphery of an endless band 22, and the band 22 is wound around sprockets 31 and 32. A tension is then given to the band 22 by an expander 4 and the sprocket 32. A frame 3 to support the sprockets 31 and 32 is connected to the arm 81 of the back hole 8, etc. The sprocket 31 is positioned in the H-shaped flange of the master pile A of sheathing wall, and the excavator 1 is lowered. The soil between the master piles A is then excavated by rotary banded excavator blades 2 and dropped naturally into the sheathing wall and then discharged.

Description

[Detailed Description of the Invention] <Industrial Application Field> When constructing an earth retaining wall, the present invention is designed to remove earth and sand remaining on the back side of the flange surface of H-shaped steel cast into the ground at predetermined intervals and the back side of the flange. Mechanically excavating the side wall surface connecting the
This relates to excavation equipment for earth retaining works.

<Conventional technology> Generally speaking, the main pile horizontal sheet pile method exists as a simple construction technology for earth retaining walls.

In this construction method, parent piles made of H-shaped steel etc. are driven into the ground at predetermined intervals in advance, and horizontal piles made of wood or other material are inserted between the parent piles in parallel with excavation to construct an earth retaining wall. .

Problems to be Solved by the Present Invention> The above-described earth retaining wall construction technology has the following problems.

(b) In order to insert the horizontal sheet piles into the main piles, it is necessary to excavate the piles so that they are set back from the plane connecting the front surfaces of the flanges of each main pile.

This work requires excavating as close as possible to the parent pile without colliding with the backhoe, etc., and requires high operating skills from the backhoe operator.

(b) Earth and sand remaining on the back side of the flange cannot be excavated with an excavator such as a backhoe, so workers must excavate and remove it with a shovel.

However, excavating with a shovel requires a lot of labor and time, and is therefore inefficient.

(c) Even if workers manually dig up the remaining soil on the back side of the flange with a shovel, it is very difficult to excavate all the way to the corners of the flange, and excavation residue often remains.

If there is excavated earth and sand, it will take time to insert the horizontal sheet piles.

(d) When excavating earth and sand remaining on the back side of the flange at high places, a stepladder, etc. is used.

However, excavation work at high places is extremely dangerous work, with people sometimes losing their lives due to falling accidents.

(e) Excavation work for the earth and sand remaining on the back side of the flange will be carried out after the mechanical excavation by backhoe etc. is completed.

Therefore, when planning the entire work process, it is necessary to plan the number of personnel who will perform manual digging so as not to lag too much behind the excavation speed of mechanical excavation such as a backhoe.

However, considering the high labor costs, it is uneconomical to secure extra personnel, and it is difficult to hire extra personnel.

OBJECTS OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to efficiently excavate the back side of the flange of each parent pile and the side wall surface connecting the back sides of the flanges to a constant depth, Another object of the present invention is to provide an excavation device for earth retaining works that can safely perform these excavation operations.

<Example> Hereinafter, an excavation device according to the present invention will be described with reference to the drawings.

〉Configuration of the whole excavation equipment (Fig. 1) The excavation equipment 1 includes a belt-shaped excavation body 2 having a large number of excavation blades on the outer periphery of an endless belt, and a belt-shaped excavation body 2 that is stretched over an arm of a backhoe or the like. It consists of a frame 3 connected to the tip.

Exit> Band-shaped excavation body The band-shaped excavation body 2 is an excavation tool that simultaneously excavates the side wall surface connecting the back side of the flange A of each parent pile and the back side of each flange A.

As the band-shaped excavation body 2, for example, as shown in FIG. 2.3, an endless band with a large number of excavation blades 21 planted around the outer periphery can be used.

A known steel chain or the like can be used for the endless band.

During excavation with the excavation blade 21, the dimensions are such that the excavation can be made to be equal to or somewhat thicker than the thickness of one horizontal sheet pile inserted into the parent pile.

(kuha) Frame The frame 3 is located on the inner circumferential side of the band-shaped excavation body 2, and has an expansion and contraction function so that the band-shaped excavation body 2 can perform rotary excavation by following changes in the distance between adjacent flanges A. Form.

For example, sprockets 31 and 32 are installed at both ends of the frame 3.
is provided rotatably.

An elastic material 4 such as an elastic spring is arranged and attached in the vertical direction midway through the frame 3 arranged in the horizontal direction.

A sprocket 41 is rotatably provided at the lowermost end of the elastic member 4.

And a band-shaped excavation body 2 is attached to each sprocket 31, 32, 41.
wrap around it.

Furthermore, an adjustment spring 33 in a compressed state is interposed in the middle of the frame 3 so that the entire length of the frame 3 can be adjusted.

By providing the adjustment spring 33, when the driving interval of the parent piles changes, the overall length of the frame 3 changes and can reliably follow the change.

Furthermore, by providing the elastic material 4, the elastic material 4 expands and contracts when the frame 3 is expanded, and conversely, when the frame 3 contracts, the elastic material 4 expands. Since the entire length of the elastic material 4 changes in conjunction with this, a certain tension can be applied to the band-shaped excavated body 2.

A motor 7 is disposed in the middle of the frame 3 so as to apply rotational force to the band-shaped excavation body 2.

(2) Engagement shafts 5 are rotatably provided near both ends of the engagement means frame 3.

The engagement shaft 5 is a member intended to be engaged with the edge of the flange A in a movable manner.

The engagement shaft 5 is installed at a position where the excavation blade 21 does not come into contact with the rib B of the parent pile when the engagement shaft 5 engages with the edge of the flange A.

In this embodiment, a case will be described in which only one engagement shaft 5 is engaged with the flange A, but it is of course possible to arrange two engagement shafts 5 so as to be hugged at both edges of the 7 flange A.

<E> Lifting means The excavating device 1 is used by being connected to an arm 81 of a backhoe 8 or the like.

To connect the excavation device 1 to the arm 81, for example, a hanging bracket 34 is provided to protrude from the frame 3.

This bracket I.34 and the tip of the arm 81 are pivotally supported by a bottle or the like and configured to be detachable.

Further, when connecting with the arm 81, it is also possible to configure the excavation device 1 so that its levelness and the turning angle in the horizontal direction can be adjusted.

Next, the excavation method will be explained.

<1> Excavation with a backhoe Excavate with a backhoe 8, etc., as close as possible to the flange A of the parent pile that has been driven into the ground.

Since the backhoe 8 cannot excavate to the back side of the flange A or to the side wall surface connecting the back sides of the flanges A, the earth and sand remain as they are.

2> Attach the excavation bag T having the above structure to the tip of the arm 81 of the backhoe 8 of the excavation equipment.
! Connect 11.

The backhoe 8 used to set the excavation equipment 1 may be connected to a different backhoe 8 than the one used for excavation work, or in some cases, it may be connected to a backhoe 8 that is used for excavation work. It is also possible to use

After connecting the drilling equipment 1 to the tip of the arm 81, the arm 8
1 is moved to position the excavation device 1 directly above the parent pile on which the side wall surface is to be excavated.

3> Start of excavation While rotating the band-shaped excavation body 2 of the excavation device 1, the excavation device 1 is gradually lowered.

At this time, the engagement shaft 5 of the excavation device 1 is connected to the flange A of the parent pile.
to engage.

As a result, the rotating belt-shaped excavation body 2 excavates the earth and sand remaining on the back side of the flange A and the side wall surface that is set back from the plane connecting the back sides of both flanges A with a straight line.

The excavated earth and sand will fall naturally and be removed.

When lowering the excavation equipment 1, even if the distance between the edges of the flanges A changes, the frame 3 expands and contracts in response to the change, so there is no need to worry about the engagement shaft 5 coming off the edges of the flanges A. This allows for stable excavation work.

<4> Installation of horizontal sheet piles Immediately after completing the excavation by the excavation device 1, the horizontal sheet piles 9 are inserted into the back side of the excavated flange A to form a retaining wall.

The insertion work of the horizontal sheet piles 9 is performed immediately after the excavation for the insertion width of at least one horizontal sheet pile 9 is completed.

As described above, while inserting the horizontal sheet piles 9 between the flanges A of adjacent main piles, covering the entire exposed area of other piles,
Perform soil retaining work.

5> Removal of the excavation rig Once the excavation rig 1 has been lowered to the lowest point, the frame 3 is forcibly contracted and removed from the parent pile, and moved to between the parent piles where the next excavation is scheduled.

By repeating the above operations, retaining walls are successively constructed on the ground immediately after excavation.

Effects> Since the present invention is as explained above, the following effects can be obtained.

(a) Excavation of the remaining soil on the back side of flanges, which conventionally relied on manual labor, and excavation between the walls connecting the back sides of adjacent flanges can now be done mechanically, without relying on manual labor.

Therefore, the excavation effect is significantly improved, and the construction period required for constructing the retaining wall can be significantly shortened.

Excavation) The excavation equipment can be attached to the end of the arm of a backhoe, etc. for excavation.

Therefore, even in high places, work safety is significantly improved because excavation can be done mechanically without relying on human resources.

(c) Just by selecting the band-shaped excavation body, excavation can be carried out according to the thickness of the horizontal sheet pile.

In addition, there is no need to leave any excavation left behind (it is possible to reliably excavate all the way to the corners on the back side of the flange, allowing for smooth insertion of horizontal sheet piles.

(d) Since the earth and sand remaining between the back side of the flange and the back side of the 7-lunge can be excavated mechanically, it is no longer necessary to secure workers for excavation work or to carefully plan the process as in the past.

(e) Since the excavation device has a structure that can be connected to the end of the arm of various construction machines such as a backhoe with a bottle or the like, it is easy to attach and detach.

(f) Excavation equipment can be used by connecting to the arms of various construction machines other than backhoes, making it highly versatile.

[Brief explanation of drawings]

Claims (1)

[Scope of Claims] A band-shaped excavation body in which a large number of excavation blades are formed on the outer periphery of an endless band, and a member that supports the band-shaped excavation body by applying a certain tension to the band-shaped excavation body on the inner circumferential side of the band-shaped excavation body, It consists of a frame having means for connecting with an arm of a backhoe, etc., and is configured so that it can move up and down by engaging with the flange of a parent pile with an H-shaped cross section driven into the ground.
Drilling equipment in earth retaining works