JPH0510445B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an earth retaining structure in which earth and sand remaining on the back side of the flange of a parent pile are mechanically excavated in order to horizontally suspend horizontal sheet piles when constructing an earth retaining wall. The invention relates to an automatic excavator.

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

In this construction method, parent piles made of H-beam steel or the like are driven into the ground at predetermined intervals in advance, and horizontal piles made of wood or the like are inserted between the parent piles to retain the earth while excavation is being carried out.

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

(b) Most of the earth and sand can be excavated mechanically using a excavator, such as a excavator.

However, the soil remaining on the back side of the flange of the H-shaped steel must be removed by a worker by digging with a scoop or the like, which requires a lot of labor.

(b) Since excavation of the earth and sand remaining on the back side of the flange is carried out using a regular scoop, it is difficult to remove the earth and sand cleanly to the corners.

If the earth and sand are not removed sufficiently, it will take extra time to insert the horizontal sheet piles.

(c) When excavating soil remaining behind the flange at high places, a stepladder, etc. is used.

However, excavation work at high places is extremely dangerous and can even lead to loss of life.

(d) Excavation work for the remaining earth and sand on the back side of the flange will be carried out after waiting for the completion of mechanical excavation using excavators such as box hoes.

Therefore, when planning the entire work process, it is necessary to plan the number of people who will carry out manual digging so as not to lag too much behind the excavation speed of machine excavators such as excavators.

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

<Objective of the present invention> The present invention was made to solve the above-mentioned problems, and provides an automatic excavator for earthworks that can excavate safely and efficiently and reduce the cost required for excavation work. The purpose is to

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

<B> Overall construction of the excavator (Fig. 1) The excavator 1 has a main body 2 that engages with the flange A of the parent pile, an excavating means consisting of a rotary blade 3 equipped with a driving means, and a rotary blade 3 that engages with the flange A of the parent pile. It is constituted by a traveling means that engages and causes the main body 2 to travel.

<B> Excavation means (FIGS. 1 and 2) Two rods 31 are rotatably passed through the main body 2, which is made up of two flat plates 21 and 22 facing each other, with an interval of the surface width L of the flange A.

A rotary blade 3 is integrally fixed to the tip of each rod 31.

The cutting radius of each rotary blade 3 is formed to be equal to the dimension of the back side of the flange A, and is dimensioned so as not to come into contact with the rib B.

The thickness (depth) of each rotary blade 3 is set close to the thickness of one horizontal sheet pile 6.

The rotary blade 3 can be of a known type, such as one with an uneven digging blade on the outer periphery of a disc, or one with independent plate-shaped digging blades attached radially.

In short, it is sufficient to have a shape that allows the back side of the flange A to be excavated to a sufficient extent to insert the horizontal sheet pile 6 into the back side of the flange A.

<C> Traveling means A running wheel 4 is integrally attached to the main body 2.

The running wheel 4 is a wheel that engages with the edge of the plate surface on the excavation side of the flange A, and is used to cause the rotary blade 3 integrated with the main body 2 to run.

An example of the running wheel 4 is, for example, as shown in FIGS. 1 and 2, the running wheel 4 is formed by connecting the running wheels 4 having engagement grooves 41 formed in the circumferential surface thereof with a connecting body 42. As shown in FIGS.

Further, the connecting body 42 has a contraction spring 43 built therein so that the entire length can be expanded and contracted according to the surface width L of the flange A.

<d> Driving means for excavation and traveling In this embodiment, a case will be described in which the rotational force of a motor is transmitted using a transmission means such as a belt as a driving means for excavating and traveling.

That is, the motor 5 is installed on the main body 2.

An excavation rotation belt 51 is wound independently between the rotation shaft 53 of the motor 5 and each rod 31.

At this time, there is also a method in which one side is an open belt and the other side is a cross belt so that the rotating direction of the rotary blade 3 is advantageous for excavation.

It goes without saying that pulleys are fixed to the rotating shaft 53 of the motor 5 and the circumferential surfaces of both rods 31.

Therefore, by rotating the motor 5,
One rotary blade 3 rotates in the forward direction, and the other rotary blade 3 rotates in the reverse direction, allowing both rotary blades 3 to excavate simultaneously.

Further, a running belt 52 is wound between each rod 31 and each running wheel 4, so that the rotational force of the rod 31 can be transmitted to the running wheel 4.

<E> Other Embodiments As other driving means for excavation and travel, it is also possible to use separate motors for excavation and travel.

In addition to the belt, known transmission means such as a chain or gear can be used as the rotation transmission means.

Next, the excavation method will be explained. (Figure 3) <1> Excavation with a backhoe Excavate the earth and sand up to the very front of the flange A of the parent pile driven underground using a backhoe 7 or the like.

Even after the excavation by the backhoe 7 is completed, a large amount of earth and sand remains on the back side of the flange A.

<2> Setting up the excavator Next, the excavator 1 having the above structure is set on the upper end of the flange A protruding from the ground.

Setting up the excavator 1 is a simple task of simply engaging the running wheel 4 with the edge of the flange A, positioning the dual rotary blades 3 on the back side of the flange A, and dropping them in, which requires almost no effort. .

<3> Start of excavation at the corner of the flange The motor 5 is activated and the excavator 1 starts excavating.

The rotational force of the motor 5 is transmitted to both rotary blades 3, and the earth and sand remaining behind the flange A is excavated.

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

Furthermore, the rotational force of the rotary blade 3 is transmitted to both running wheels 4, and the running wheels 4 start running.

As a result, continuous excavation by both rotary blades 3 progresses while descending according to gravity due to the running wheels 4 supporting their own weight.

<4> Installation of horizontal sheet piles Immediately after completing the excavation of the back side of flange A of each adjacent parent pile, horizontal sheet piles 6 are inserted into the excavated back side of flange A to form a retaining wall.

The work of inserting the horizontal sheet piles 6 is performed immediately after the excavation for the insertion width of at least one horizontal sheet pile 6 is completed.

As described above, the flange A of the adjacent main pile
Earth retaining work is performed by covering the entire exposed ground by inserting horizontal piles 6 in between.

<5> Removal of the excavator When the excavator 1 reaches the bottom, remove one of the rotary blades 3 and remove the main body 2 from the main pile.

Since the running wheel 4 is only supported by the contraction spring 43, it is easy to remove it.

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

(b) Excavation of the soil remaining on the back side of the flange, which conventionally relied on manual labor, can now be done mechanically without manual labor.

(b) All you have to do is set the excavator at the top of the main pile, and the excavator will automatically dig while descending, greatly improving work safety.

(c) Just by selecting the rotary blade, excavation can be performed according to the thickness of the horizontal sheet pile.

In addition, there is no leftover excavation, and it is possible to reliably excavate all the way to the corners, allowing for smooth insertion of horizontal sheet piles.

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

(E) The excavation efficiency of the earth and sand remaining behind the flange can be adjusted in any way.

Therefore, the excavation work for the earth and sand remaining on the back side of the flange can be carried out without delaying the excavation work by the backhoe, and the construction period for the entire earth retaining work can be shortened.

(F) When removing the parent pile, it is also possible to use an excavator to remove earth and sand that adheres to the flange surface, etc. of the parent pile.

[Brief explanation of the drawing]

Figure 1: An explanatory diagram of an embodiment of the present invention, Figure 2:
An explanatory diagram of the driving force transmission means of the excavator, FIG. 3: An explanatory diagram of earth retaining work. 1: Excavator, 3: Rotating blade, 4: Running wheel, A: Flange, B: Rib.

Claims (1)

[Scope of Claims] 1. Excavation means located on the back side of the flange of a parent pile with an H-shaped cross section driven into the ground, and which is integrated with the excavation means and engages with both edges of the flange of the parent pile. An automatic excavator for use in earth retaining works, which has a traveling means that travels by moving.