JPH01312116A - Excavator - Google Patents

Abstract

PURPOSE:To efficiently execute band-shaped reinforcing member earthwork by setting a chain with a cutter turning along a frame on a guide cell, on a truck, and by setting a device for inserting a band-shaped reinforcing member into an excavated slot. CONSTITUTION:An excavator D is composed of a bearing device 3 having a moving-down, elevating, and swinging mechanism 4 and a slide base 5 and supporting a guide cell 6 slidably, a roller chain 8 with a cutter 9 on the device 3, and an excavating device 7 consisting of a frame 10 with the roller chain 8 fitted rotatably, which are arranged on a self-travelling truck 1 having a crawler 2. On the upper surface of the frame 10 of the excavating device 7, a reinforcing member 70 is mounted, and an rear end is engaged with a stopper 71.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an excavator, and more specifically, it is used for excavating on natural mountain slopes, cutting slopes, or embankment slopes, as well as reinforcing and repairing embankments. This invention relates to an excavator that can drill a wide and long hole, insert a reinforcing strip into the hole, and inject a reinforcing material such as cement milk.

[Conventional technology]

Reinforced earthwork methods are aimed at stabilizing slopes and increasing their bearing capacity, and these methods can be broadly divided into natural ground and embankments.

A method of reinforcing natural ground is to drill a hole in the ground, insert a reinforcing bar, and fill the surrounding area with mortar to form an opening with a diameter of about 100 mm. In this case, there is no special construction machine, and after drilling a hole with a circular cross section using an existing rotary or rotary percussion drilling machine, reinforcing bars are inserted manually and then filled with mortar.

On the other hand, there are various methods of reinforcing the embankment body, such as the Terre Armé method, but all of them are methods that are only applied during the construction of the embankment.

In any case, there is no machine that can efficiently reinforce slopes.

[Problem to be solved by the invention]

The above-mentioned proposed reinforcement earthwork method for natural ground involves constructing reinforcing bars or small-end warps containing reinforcing bars on other mountains for reinforcement.
In addition to the need to install a large number of reinforcing materials into the ground, there is no machinery to efficiently insert the reinforcing materials and inject and fix the grout, so the entire construction process requires a great deal of effort.

In order to solve the above problems, a slope reinforcement method using strip reinforcement has already been proposed. (Special application No. 15472, 1983)
(Refer to the above publication) The present invention enables efficient casting of the band-shaped reinforcing material proposed in the above-mentioned band-shaped reinforced earthwork method. The first objective is to provide an excavator that can carry out a series of construction operations in one stroke, including inserting the material into the material, filling it with reinforcing material such as cement milk, and solidifying it.
The purpose of

A further second object is to provide an excavator for reinforcing embankment slopes.

For example, in the case of reinforcing an embankment, it is clear that reinforcing only the surface of the embankment is insufficient when the interior of the embankment contains water and is in a soft state. In other words, sufficient strength cannot be obtained unless the internal structure of the embankment is reinforced.

When constructing an embankment, there is also a method of interposing reinforcing seams 1~ in the middle part, but this construction method is possible when constructing a new embankment, but it is not possible to insert reinforcing members in the middle layer of an already constructed embankment. It is impossible to insert .

In this way, a relatively weak structure such as an embankment is constructed with a long, preferably wide cross-sectional area, and by filling this long area with reinforcing material such as belt-shaped reinforcing material and cement milk and solidifying it as if it were constructed To provide an excavator that can be reinforced with a concrete plate inserted from the beginning.

[Means to solve the problem]

In order to achieve the above object, the excavator in the present invention has the following features:
It consists of a guide cell supported on a truck, a frame provided on the guide cell so as to be movable back and forth, an excavation device consisting of a chain with a cutter that revolves around the frame, and a feed device for the excavation device, The drilling rig is characterized in that it is provided with a device for inserting a reinforcing strip into the borehole along the frame, and a device for injecting a filler material into the borehole during the return movement of the drilling rig. It is.

The guide cell supports the excavation equipment and maintains stability during excavation by pressing the tip against the reinforced body, and the entire guide cell slides slightly forward in order to adjust the distance between it and the reinforced body. It is preferable to make it possible. Further, the trolley supporting this guide cell may be of a stationary type or a towed type, but a self-propelled type having rollers or rubber tires is preferable.

A reinforcing strip is placed on the drilling rig, and after drilling is completed, the reinforcing strip is left in the hole while the drilling rig is pulled out of the hole; A vibrator for injecting a reinforcing material such as cement milk is provided, and after drilling is completed, the reinforcing material is injected and filled while the excavation device is pulled out of the hole, and solidified together with the strip-shaped reinforcing material to remove the ground, etc. Constructed to reinforce.

It is preferable to use a rigid material as the band-shaped reinforcing material, and one made of long flat steel is generally used.

Further, it is preferable that the excavation device is provided with a shock absorber for absorbing the impact load applied to the cutter and preventing breakage of the cheno and damage to each member.

The length of the frame of the excavation device is preferably increased depending on the depth of the part to be reinforced, such as an embankment or earth, but one with a length of about 4 m is used for boat fishing.

[For production]

The excavator configured as described above can drill a hole with a relatively small rectangular cross section deep inside the reinforced body using the cutter that circulates along the frame, and the cut chips are returned to the hole by the returning cutter. It acts to expel the water to the outside.

Further, the excavation position and direction are controlled by a guide cell supporting the excavation device so that the excavation device can be installed at a predetermined position and direction.

Further, after the excavation is completed, the belt-shaped reinforcing material is left in the hole while the excavation device is pulled out of the hole, and the reinforcing material is injected, so that the interior of the reinforced object can be strongly reinforced in a short time.

〔Example〕

FIG. 1 is a side view of an excavator according to the present invention, and FIG. 2 is a plan view thereof.

The excavator is mounted on a self-propelled trolley 1 having a floor 2.
A guide cell 6 is slidably supported on a support device 3 having a lifting, lowering, and turning mechanism 4 and a slide base 5, and furthermore, a roller chain 8 with a cutter 9 and the roller chain 8 are mounted on the guide cell 6. The excavating device 7 includes a frame 10 mounted so as to be rotatable, and the excavating device 7 is slidably provided by a feed device 13.

The support device 3 is provided with a hydraulic cylinder 15 for sliding the guide cell 6, and the tip of the cylinder ring 16 of the hydraulic cylinder 15 is connected to a mounting plate provided at the rear end of the guide cell 6. 17.

The guide cell 6 is provided with a feed device 13 for sliding the frame 10. Also,
A pressing part 25 is provided at the tip of the guide cell 6, and this pressing part 25 is pressed against the ground to suppress the shaking of the excavation equipment during excavation and to stabilize the excavation direction. There is.

Next, the excavating device 7 will be explained with reference to FIGS. 1 to 11.

[The IJ equipment W7 includes a frame 10, a driving sprocket 28 provided at the rear end of the frame 10, and the frame 10.
It consists of a roller chain 8 wound between driven sprockets 29 provided at the front end of the roller chain 8.
A large number of cutters 9 with their cutting edges facing the excavation direction are arranged in series, and by driving a hydraulic motor 33, the roller chain 8 is rotated around a frame 10 to drill holes with a rectangular cross section.

The hole drilled by this drilling device 7 has a rectangular cross section with a width of about 200 to 400 m/m, a height of about 50 to loom/m, and a depth of about 4 to 8 m.

An intermediate roller 34 is provided between the frame 10 and the guide cell 6, as shown in FIG. 3.4, in order to prevent the frame 10 from being bent. This intermediate roller 34 is structured to move following the movement of the frame 10.

In addition, in order to prevent the frame 10 from meandering and lifting during excavation, a round bar-shaped guide rail 35 is provided on the guide cell 6 as shown in FIG. 5a.
A pipe-shaped fitting member 36 provided therein fits and slides.

The roller chain 8 rotates around the frame 10 by driving a hydraulic motor 33 provided at the rear of the frame 10, and the frame 10 slides back and forth by driving a feed motor 18.

To explain the roller chain 8 and cutter 9 in more detail, the roller chain 8 has a driving sprocket 28
is wound around the driven sprocket 29 and the frame 1
It is an endless chain that is guided by the frame 10 and revolves around the frame 10.

This roller chain 8 is provided with an axotiment 38, and a force/seventer 9 is attached via a bolt 39 and a nut 40. Note that this NAND 40 has a locking function.

As shown in detail in FIGS. 3 and 5 to 9, the cuckoo 9 has a plurality of cutters 9. each having a different cutting width. a,
9b, 9c, and 9d, which are basically arranged in order of decreasing cutting width, but this is because the hole 4 has a predetermined size.
The cutter 9a is for drilling the hole 42 smoothly, the cutter 9a is for the center of the side of the hole 42, the cutter 9b is for the both ends of the side of the hole 42, the cutter 9C is for the corner of the hole 42, and the cutter 9d is for digging the hole 42 smoothly.
The cutters are arranged so that the entire area around the hole 42 can be covered with the entire cutter.

This roller chain 8 is provided with a shock absorber 44 for preventing damage when an abnormal impact load is applied. As shown in FIG. 3.4, this shock absorber 44 is connected to a rubber buffer 46 provided on a hydraulic motor mounting plate 45 through a threaded rod 47 fixed to the frame 10.
The push plate 49 at the tip of the roller chain 8 is brought into contact with the rubber buffer 46 and the threaded rod 48 is screwed in to compress the rubber buffer 46 and apply a preload to the roller chain 8 to tension it.

Since the hydraulic motor mounting plate 45 is slidably supported by a port 52 in an elongated hole 51 provided in the slide base 50, when an impact load is applied to the roller chain 8, the hydraulic motor mounting plate 45 is slide base 50
As the rubber buffer 46 moves slightly on top, the amount of deflection of the rubber buffer 46 decreases, and the impact load is absorbed.

Furthermore, although not shown, an accumulation rake is provided in the hydraulic circuit to prevent abnormal shock loads from acting on the various devices.

Note that a structure may be adopted in which a shock absorbing cylinder is attached to the driven sprocket 29 as a shock absorbing device.

As described above, the excavation device 7 excavates the ground while going around the frame 10, and is pulled out when the excavation is completed. Part of the hole collapsed during extraction, and drilling equipment 7
may be difficult to pull out.

For this reason, in this embodiment, a device is provided to move the excavating roller chain 8 back and forth in small increments to facilitate extraction.

As shown in FIG. 10.11, this device is provided with a stopper receiver 55 on a slide base 50, and on the stopper receiver 55,
A stopper 58 is slidably and securely fitted to the threaded rod 56 at a throat 57° 57, and two protrusions 60 are provided at a predetermined interval on the lower end of the drive sprocket 28 via a stopper fixing plate 59. They are configured to engage alternately.

That is, when a part of the drilled hole collapses and it becomes difficult to pull out the drilling device 7, the stopper 58 is moved in the direction of arrow A, and the drive sprocket 28 is rotated. Then, the protrusion 60a hits the stopper 58, and the drive sprocket 28 stops.

Next, the stopped drive sprocket 28 is reversed and rotated until it hits another protrusion 60b. By repeating such operations, the roller chain 8 moves back and forth in small increments, making it possible to easily pull out the excavation device 7 from the hole.

The distance between the two protrusions 60a and 60b is set to a size that restricts the movement of the roller chain 8 so that the wide cutters 9c and 9d do not move to a range through which a reinforcing material 70, which will be described later, passes.

Note that during normal excavation, the stomper 58
It is sufficient to move it in the direction of arrow B.

Next, the operation of the excavating device 7 will be explained with reference to FIG. 1.2.

First, the hydraulic cylinder 15 is activated to move the guide cell 6 forward and press it against the earth, and then the feed motor 18 is driven to rotate the roller chain 8 and press the frame 10 toward the earth. The serially installed cutters 9 cut the earth and sand one after another like disc cutters.

The cut earth and sand chips are collected by the cutter 9 and discharged out of the hole.

Depending on the soil quality and degree of softness of the ground to be excavated,
The rotational speed of the roller chain 8 and the feeding speed of the feed device 13 can be adjusted to obtain appropriate cutting conditions.

Next, the cement milk injection device 63 installed in this excavator will be explained with reference to Figures 13 and 4.12.

This injection device 63 has a synthetic resin vibro 3 having an inner diameter of 10 to 20 m/m and having an injection port 64 at one end and a discharge port 65 at the other end, which is disposed from the rear to the front of the frame 10. The injection port 64 is supported by a support 66 provided at the rear of the frame 10.

Further, the vibro 3 passes through the inside of the frame 10, and the discharge port 65 at the other end passes through a partition plate 67 provided at the rear of the driven sprocket 29, and its tip is expanded as shown in FIG.

The injection device 62 is composed of two sets, and the injection port 64 is connected to a pipe of a cement milk supply device (not shown).

This injection device 62 injects cement milk into a hole drilled by the drilling device 7, solidifies it, and reinforces the ground, and fills the hole by injecting cement milk while pulling out the drilling device 7 from the hole. This is how it was done.

Next, we will explain the reinforcing material 70 installed in this excavator and its insertion method in the first section. 2. 4. This will be explained with reference to FIG.

This reinforcing material 70 has a width of about 100 to 300 m/m and a thickness of about 3 m/m.
It is made of a flat steel plate with a length of ~12 m/m and a length of 4 to 8 m, and is placed flat on the upper surface of the frame 10 of the excavation equipment 7, and the rear end is locked with a stopper 71, so that it can be easily used during excavation. is inserted into the hole to be drilled together with the frame 10.

When the drilling is completed and the frame 10 is pulled out of the hole, the ratchet attachment gate 72 at the tip of the guide cell 6
By locking the rear end of the reinforcing member 70 with the tip of a ratchet 73 provided in the hole, the reinforcing member 70 is left in the hole. Then, as described above, by injecting cement milk, the cement and the reinforcing material 70 are integrated, and the ground can be reinforced.

When excavating with this reinforcing material 70 placed on the frame 10, if there are cutters 9c and 9d with wide cutting widths on the front of the driven sprocket 9 when pulling out the frame 10, they will interfere with the reinforcing material 70 and pull it out. (Therefore, when pulling out the frame 10 as shown in Fig. 8,
The cutters in the range through which the reinforcing material 70 passes are arranged so that the cutter 9a or 9b with a narrow cutting width is placed.

In addition, in order to confirm that the cutter arrangement on the front surface of the driven sprocket 29 is as described above, the cutter arrangement on the rear surface of the drive sprocket 28 is also approximately the same as the cutter arrangement on the front surface of the driven sprocket 29. It is arranged as follows.

Next, the feed device 13 will be explained with reference to FIG. 1.2.

The feed device 13 provides the excavation device 7 with the pressing force and feed speed necessary for excavation, and includes a drive wheel 21 provided at the rear end of the guide cell 6 and a driven wheel 21 provided in front of the guide cell 6. A chino 23 is wound endlessly between the wheels 22, and a hydraulic motor 18 is connected to the drive wheel 21 via a speed reducer 19.

Since the chien 23 is fixed to a chino fixture 75 provided at the rear end of the excavation rig 7 , driving the hydraulic motor 18 moves the chien 23 and further moves the excavation rig 7 . It can be moved.

〔Effect of the invention〕

As described above, the excavator according to the present invention includes a guide cell supported on a truck, a frame provided on the guide cell so as to be movable back and forth, and a chain with a cutter that revolves around the frame. , a feeding device of the drilling rig, the drilling rig including a device for inserting a reinforcing strip into the borehole along the frame, and a device for injecting filler material into the borehole during the return movement of the drilling rig. The device is characterized by being provided with a device, and the following effects can be achieved.

Using a frame with many cutters orbiting around it, it is possible to drill a hole with a deep rectangular cross section in relatively soft natural ground, insert a band-shaped reinforcing material, and fill it with cement milk during the process of returning the excavation equipment. The belt-shaped reinforced earth construction method can be efficiently carried out in one step using one excavator, reducing work time.

In addition, even existing embankments and earthworks can be strongly reinforced to the inside, and their strength can be maintained for an extremely long period of time.

[Brief explanation of the drawing]

FIG. 1 is a side view of the excavator of the present invention, FIG. 2 is a plan view thereof,
Fig. 3 is an enlarged plan view of the front and rear parts of the excavation equipment, Fig. 4 is a side view of the same, Fig. 5 is a sectional view taken along the line V-■ in Fig. 3, and Fig. 5a is a -■ a-■ in Fig. 4. A cross-sectional view in the direction of arrow a, Figure 6 is vr in Figure 3.
-vr arrow sectional view, Fig. 7 is a sectional view taken from the 10 is a sectional view taken along line X-X in FIG. 4, FIG. 11 is a sectional view taken along line XI-XI in FIG. 10, and FIG. 12 is an enlarged view of section XII in FIG. 4. 1st
3 is an enlarged view of the main part of the feed device, and FIG. 14 is a sectional view taken along the line XIV-XIV in FIG. 13. D... Excavator, 3... Support device, 6... Guide cell, 7... Drilling device, 8... Roller chain, 9...
・Force/Tuta-110... Frame, 13... Feed device, 21... Drive wheel, 22... Driven wheel, 23... Che 7.28... Drive sprocket throat, 29... ... Driven sprocket, 33 ... Hydraulic motor, 34 ... Intermediate roller, 35 ... Guide rail,
36... Fitting member, 38... Attachment, 44
...Buffer device, 62...Injection device, 70...Reinforcement material, 73...Ratchet Agent Patent attorney Nobuo Ogawa -

Claims (1)

[Claims] 1. An excavation device consisting of a guide cell supported on a truck, a frame provided on the guide cell so as to be movable back and forth, and a chain with a cutter that revolves around the frame, and the excavation device. 1. An excavator comprising a feed device for the excavator, the excavator being provided with a device for inserting a reinforcing strip into the borehole along the frame. 2. The excavator according to claim 1, further comprising a device for injecting filler material into the borehole during the return operation of the excavator.