JPH0455520A - Widening excavating machine for excavated channel - Google Patents

Abstract

PURPOSE:To enhance the efficiency of work by providing the lower section of an excavating machine main-body, which a tip excavation bit to be rotated with the horizontal shaft as a center, and by providing the one side surface and rear side surface of said main body, with widening excavating bits to be rotated with the horizontal shaft as a center and for enabling the horizontal direction position to be changed. CONSTITUTION:A guide wall 4 is constructed, and the guide wall 4 is filled up with stabilizer 6, and between parting walls 41, a widening excavating machine is set. After that, tip bits 11 are rotated, and excavation is performed to the bottom sections 42 of the parting walls 41. After that, widening bits 2 are projected in the extended directions of excavated channels 2. Besides, ground under the bottom sections 42 is excavated to be widened in the extended directions of the excavated channels to a specified depth, with the widening bits 2.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an excavator for widening an excavation trench.

<Prior Art> When constructing a continuous wall underground, there is an excavated trench widening technique in which a trench excavated in the ground is widened at a predetermined depth and connected to an adjacent excavated trench underground.

For example, as shown in Figure 6.7, when constructing a continuous underground wall from the water surface into the water bottom ground 5,
The guide wall 4 is constructed to a predetermined depth of 5, the stabilizing liquid 6 is filled in the guide wall 4, and the space between the partition walls 41 of the guide wall 4 is excavated by an excavator 7.

After excavating to the partition wall bottom 42, the partition wall bottom 42 is excavated.
A method is adopted in which the ground further down is widened in the extending direction of the excavated trench, the unexcavated portion below the partition wall bottom 42 is removed, and the excavated trench is made continuous with the adjacent excavated trench.

<Problems to be Solved by the Present Invention> In the above method, when widening excavation is performed below the bulkhead bottom 42 in the extending direction of the excavation trench, conventionally, a device capable of performing both normal excavation and widening excavation inside the bulkhead 41 has been used. Because there was no
Excavator 7 was pulled up and another excavator for widening was used to excavate.

As a result, excavation work was interrupted, leading to a decrease in work efficiency.

In addition, two excavators were required, one for normal excavation and one for widened excavation, which was uneconomical.

<Object of the present invention> The present invention has been made to solve the above-mentioned problems, and it is possible to perform both normal excavation and widening excavation with a platform, thereby improving the efficiency and economy of the widening work of excavated trenches. An object of the present invention is to provide an excavator for widening an excavation trench, which can improve performance.

<Means for Solving the Problems> That is, the present invention provides a cutting edge drilling bit which is provided at the bottom of the excavator body and rotates around a horizontal axis, and which is provided on one side and the back of the excavator body. This is a widening excavator for excavating trenches, which consists of a widening excavation bit that rotates around a shaft and whose position can be changed in the horizontal direction.

<Description of the present invention> The present invention will be explained in detail below.

<A> Tip bit (FIG. 1) The widening excavator of the present invention is equipped with a tip bit 11 at the bottom of its main body 1.

This tip bit 11 may have a structure in which a plurality of digging blades are provided on the circumferential surface of a drum-shaped member or the like that rotates around a horizontal axis.

Further, a mud draining pipe 12 for discharging excavated earth and sand to the above-ground part is communicated with the upper part of the main body 1.

<Opening> A plurality of widening bits 2 are equipped on one side of the widening bit body 1 and its back surface.

This widening bit 2 is a drum-shaped member with a plurality of digging blades provided on the curved surface, for example, like the tip bit 11.

The widening bit 2 is fixed to the free end of a telescopic rotating shaft 21 horizontally attached to the side surface of the main body 1.

The base end of the telescopic rotating shaft 21 is connected to a hydraulic or electric motor built in the main body 1 so as to be rotatable.

Further, the telescopic rotary shaft 21 is configured to be horizontally telescopic by a known hydraulic cylinder mechanism or the like.

Therefore, by rotating and extending/contracting this telescopic rotary shaft 21, the widening bit 2 can be rotated and its position can be changed in the horizontal direction.

The installation position of the widening bit 2 is as shown in Figure 1.
It is attached to one side of the main body 1 and the back thereof, and configured so that both end faces in the extending direction of the excavation groove can be excavated.

Kuha〉Both sides of the correction plate main body 1 on which the widening bit 2 is not attached (surfaces parallel to the extending direction of the excavated groove) have a plate whose position can be changed in the horizontal direction by a known hydraulic cylinder mechanism such as the one described above. A correction plate 3 may be equipped.

This correction plate 3 corrects the meandering etc. of the main body 1 during excavation.
It has the function of changing the position in the horizontal direction and correcting the excavation trajectory to a normal excavation trajectory by taking a reaction force in a plane parallel to the direction of extension of the excavation groove.

<Operation of the widening excavator of the present invention> The operation of the widening excavator of the present invention configured as described above will be explained.

In addition, in the following description, the case where a continuous underground wall is constructed in the underwater ground 5 from above water is mentioned as an example, and is demonstrated.

(1) Construction of a guide wall (Fig. 2.3) First, a guide wall 4 is constructed around the ground where a trench is to be excavated.

When constructing a continuous underground wall in the fishery area 1*5 from above the water, the guide wall 4 is constructed from the water surface to a predetermined depth of the underwater ground 5.

Both end surfaces of the guide wall 4 perpendicular to the extending direction of the excavated groove are partition walls 41.

(2) Normal excavation between the partition walls (FIG. 2.3) Next, the guide wall 4 is filled with the stabilizing liquid 6, and the widening excavator of the present invention is set between the partition walls 41.

When setting the widening excavator, place the widening bit 2 on the bulkhead 4.
Position it on the 1st side.

Then, rotate the tip bit 11 to remove the bottom 4 of the partition wall 41.
Excavate up to 2.

At this time, the meandering of the main body 1 during excavation is corrected by the correction plate 3 during excavation.

(3) Excavation to widen the lower part of the bulkhead (Fig. 4.5) Bottom of the bulkhead 42
After the excavation has progressed to
Protrude in the direction of extension of the excavation trench below.

Then, the ground below the partition wall bottom 42 is excavated to a predetermined depth in the extending direction of the excavated trench.

Thereby, the unexcavated portion below the partition wall bottom portion 42 can be excavated and removed, and can be made continuous with the adjacent excavated groove.

The above is a case of constructing a continuous underground wall from above the water into the underwater ground 5, but by adjusting the protruding length of the widening bit 2, the width of the excavated trench can be changed freely, and other various types of walls can be constructed. It can be used for various types of construction.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> The widening excavator of the present invention can perform normal excavation inside the bulkhead with the tip bit, and by protruding the widening bit in the horizontal direction, widening excavation of the unexcavated portion below the bulkhead can be performed. I can do it.

In other words, normal excavation and widening excavation can be performed successively with a -base excavator.

Therefore, it is possible to improve the efficiency and economic efficiency of the work of widening the excavated trench.

<Open> By adjusting the protruding length of the widening bit, the width of the excavated groove can be changed freely, so it can be used for various construction projects.

[Brief explanation of drawings]

Figure 1: Illustration ratio of the widening excavator of the present invention 2.3 Figure: Illustration ratio of normal excavation between bulkheads Figure 4.5: Illustration ratio of widening excavation below the bulkhead Figure 6.7: Conventional technology Explanatory diagram agent Patent attorney Fumi Yamaguchi Sakuo passed away

Claims (1)

[Claims] (1) A tip drilling bit installed at the bottom of the excavator body that rotates around a horizontal axis, and a tip that rotates around a horizontal axis and is positioned horizontally, installed on one side and the back of the excavator body. A trench widening excavator consisting of a changeable widening drilling bit.