JPH01271514A - Compacting method for back-fill material for back of structure - Google Patents

Abstract

PURPOSE:To perform compaction easily and strongly even in a narrow and deep place and prevent structure such as culvert from damage by using a horizontal roll pressurization plate and a longitudinal vibrating plate driven by an oil pressure source furnished at a working machine. CONSTITUTION:A longitudinal vibrating plate 78 is oriented in parallel with an abutment 1 and excited by a hydraulic motor 71 into longitudinal vibration, and a hydraulic cylinder for expansion and contraction 60 is elongated by and by to intrude the vibrating plate 78. After filling and compacting the deeper portion of back-fill material 3, a horizontal pressure roll pressurization plate 83 is fitted to the frame 73 of an exciter device 70 instead of the vibrating plate 78, and roll pressurization is conducted to make stamping of the back-fill material 3 in its portions middle and thereover.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a construction method for compacting backfill material on the back side of a structure such as an abutment.

(Prior Art) As shown in FIG. 6, the back surface 2 of the abutment l is generally formed into an inclined surface, and a backfilling material 3 made of sand or gravel is filled between the back surface 2 and the abutment l.

This backfilling material 3 is produced by repeatedly filling the backfilling material 3 to a predetermined unit thickness and then compacting it.
After that, the surface paving stone layer 4 and pavement layer 5 are constructed, but the abutment l
Compaction of the backfill material in the deep area between the back surface 2 and the rear surface 2 cannot be done using compaction rollers, so conventionally the backfill material is backfilled with a thin layer and the worker 6 operates a small run muff to compact it. This was done by repeating the hardening process. In addition, as shown in FIG. 7, the backfilling material 3 of the box culvert 10, and as shown in FIGS. 8(A) and (B), walls 11, Compaction of the backfilling material 3 in No. 12 was performed in the same manner as described above, by backfilling with a thin layer of sand or gravel and compacting with a run muff.

(Problem to be solved by the invention) However, there are restrictions on the size of the run muff, and it is difficult to backfill and compact deep areas with a thin layer.Furthermore, the compaction force of the run muff is weak, so As a result, as shown in Figures 6 and 7, the area near the road abutment 1 and culvert 1O collapses as shown in a, and the structure moves and deforms. There was a problem. Also, as shown in Figure 7, when backfilling material 3 is compacted on both sides of the structure, compaction is done by backfilling in a thin layer, so uneven earth pressure is not applied to the structure. Care must be taken when constructing.

In addition, the backfilling material is conventionally compacted by a compaction roller, but when a compaction roller is used, the culvert 10
There is a risk of damaging structures such as bridge abutments 1.

SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to provide a construction method that can sufficiently compact backfill material in deep areas. Another object of the present invention is to provide a method of rolling the upper part without causing damage to the structure.

(Means for Solving the Problems) In the method of compacting backfilling material on the back side of a structure according to the present invention, when compacting backfilling material deep on the backside of an abutment, 1. A diaphragm is press-fitted into the backfilling material, and the vertical diaphragm is pushed while vibrating vertically using a vibration excitation device whose power source is a hydraulic motor operated by a hydraulic power source mounted on a working machine. It is characterized by compacting backfill material.

In addition, the method of the present invention is a construction method in which the backfill material in the remaining soil area is compacted using a horizontal rolling plate attached to the arm, which allows the entire backfill material to be safely compacted without using rolling rollers. It can be compacted.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Figures 1 and 2 show the backfilling material 3 of an abutment l being compacted by a vibratory compaction machine 30. This vibratory compaction machine 30 uses a hydraulic excavator as a base machine. , an upper rotating body 33 is installed on the lower traveling body 31 via a rotating device 32, and the upper rotating body 3
A driver's cab 34 is installed in 3.

Although the present invention can use a normal front consisting of a normal hoisting boom and a vertically moving arm as the front,
In this embodiment, a trench front 35 is used which has the advantages described below. The M side ditch digging front 35 includes a hoisting boom 38 that is attached to the upper revolving body 33 so as to be able to be raised and lowered by a hydraulic cylinder 37 around a pin 36, and a hoisting boom 38 that can be rotated left and right at the tip of the boom 38 by a hydraulic cylinder 40 around a pin 39. A rotary boom 41 that is movably attached;
An arm support 43 is attached to the tip of the rotating boom 41 so as to be rotatable left and right about a pin 42, and an arm support 43 is attached to the tip of the arm support 43 so as to be rotatable in the vertical direction about a pin 44 by a hydraulic cylinder 45. The attached arm 46, the arm support 43, and the arm 46, regardless of whether the rotating boom 41 rotates from side to side,
The luffing boom 3 is always parallel to the luffing boom 38.
8 and a parallel link 51 (the line connecting the pins 39, 42, 50, 49 always forms a parallelogram) whose ends are connected to brackets 47, 48 fixed to each side of the arm support 43 by pins 49, 50. A vibration compaction device 56 is attached to the tip of the arm 46 so as to be rotatable about a pin 53 via links 54 and 55 by a hydraulic cylinder 52 called a bucket cylinder. Note that a hydraulic cylinder may be used instead of the parallel link 51, and a horizontal rotation boom may be used instead of the hoisting boom 38 to configure the parallel link mechanism.

As shown in FIGS. 3 and 4, the vibration compaction device 56
One end of the bracket 58 is connected to the tip of the arm 46 by a pin 53, and the other end is connected to the link 55 by a pin 57. Reference numeral 59 denotes a multi-stage cylindrical telescopic body, and in this embodiment, an example is shown in which it is a two-stage telescoping type consisting of an outer cylinder 159 a and an inner cylinder 59 b, and the outer cylinder 59 a is connected to the pin 53 .
It is fixed by welding or the like so that the center is located in the center between the cylinders 57 and 57. Inside, there is a telescopic hydraulic cylinder 60, the tube side end of which is connected to the outer cylinder 59a by a pin 61, and the piston rod is connected by a pin 62. It is attached by being connected to the inner cylinder 59b.

Reference numeral 63 denotes a turning device installed between the lower end of the inner cylinder 59b of the multistage cylindrical expandable body 59 and a movable frame 64 forming an inverted U shape. It consists of a cylindrical case 66 flange-coupled to 65, a hydraulic swing motor 67 fixed within the case 66, an output gear of the swing motor 6γ, and an internal gear at the center of the movable frame 64. It has a power transmission part 68, and has a rotary joint 69 in the center thereof that supplies hydraulic oil to the vibration excitation hydraulic motor 71 of the vibration excitation device 70. Instead of a swivel device having such a swivel motor 67, the movable frame 64 can be swiveled when the vibrating compaction device M56 is inactive, and the movable frame 64 can be swiveled when the vibratory device 70 etc. It is also possible to use a rotating device in which the movable frame 64 is locked with the cylindrical case by the hydraulic fluid when the hydraulic fluid is supplied to the device 56.

The vibration device 670 is attached to the upper part of the frame 73 or to the left and right inner surfaces of the movable frame 64 via elastic members 72 made of rubber or springs for absorbing vibrations and transmitting pressing force. The vibration generating hydraulic motor 71 is attached to the eccentric weight 74 rotated by the hydraulic motor 71, an eccentric weight 75 arranged in parallel to the eccentric weight 74, and an eccentric weight 74 and 75 respectively attached concentrically to each other. and gears 76 and 77 that mesh with each other. Then, the eccentric directions of the eccentric weights 74 and 75 are set in opposite directions so as to form the same angle, and the meshing of the gears 76 and 77 allows the eccentric weights to be eccentric! !
By rotating 74 and 75 in the opposite direction, the vibration force in the lateral direction is canceled out and only the vibration force in the vertical direction remains. The telescopic hydraulic cylinder 60, the swing motor 67, and the vibration hydraulic motor 71 that constitute the vibration compaction device 56 are driven by hydraulic fluid supplied from a hydraulic source mounted on the hydraulic excavator 30.

Reference numeral 78 denotes a vertical diaphragm detachably attached to the lower surface of the oscillating device frame 73 with bolts 79.

Reference numeral 80 denotes a vertical meter mounted on the outer surface of the outer cylinder 59a of the multi-stage cylindrical expandable body 59, and the verticality measured by the vertical meter 80 is displayed on the display 81 in the driver's cab 34. It has become.

When using this work machine to compact the backfill material 3 filled deep between the abutment 1 and the back surface 2 as shown in FIGS. 1 and 2, the rotation motor 67 of the rotation device 63 The vertical vibrating plate 78 is oriented parallel to the abutment 1 by activating the hydraulic cylinder 52 while the operator is looking at the display 81 that displays the verticality.
The height of the vibration compaction device 56 is controlled by operating the boom hoisting hydraulic cylinder 37 or the arm rotating hydraulic cylinder 45, and the vibration hydraulic motor 71 is operated to control the height of the vibration compaction device 56. While vertically vibrating the vertical vibration plate 78, the telescopic hydraulic cylinder 60 is sequentially extended.
8 in one row (two or more rows depending on the backfill thickness of the backfill material)
Compaction is performed by pushing.

The position of the vertical diaphragm 78 in the direction along the wall surface of the abutment 1 is controlled by operating the hydraulic cylinder 40 to move the arm 46 from the solid line C to the left and right as shown by the two-dot chain line in FIG. This can be done by In this case, as in the present embodiment, by using the ditch digging front 35 as the front, there is no need to operate the swing device 32 of the hydraulic excavator, so the swing device 63 can be operated regardless of the horizontal movement of the vibration compaction device 56. Vertical diaphragm 78 even if it is not activated.
can be maintained in a constant orientation.

In this way, strong compaction is possible while the hydraulic excavator 30 receives the compaction reaction force due to the force of the vertical pressing by the hydraulic cylinder 60 of the vibration compaction device 56 and the vibration force by the vibration device 70. .

Furthermore, once the multi-stage cylindrical expandable body 59 is set vertically, only the hydraulic cylinder 60 built into the multi-stage cylindrical expandable body 59 can be expanded and contracted to perform compaction, and vertical haze will not become a problem. Because compaction can be done.

Easy to operate. Further, the position of the vertical diaphragm 78 can be controlled by, for example, aligning the position of the connecting pin 53 with respect to the arm 46 of the mounting bracket 58 with the surface 15 of the backfilling material 3, and extending the hydraulic cylinder 6°. 7
By setting the rolling surface of No. 8 to the target depth, highly accurate compaction can be performed.

After the deep filling and compaction of the backfilling material 3 of the abutment l is performed in this way, as shown in FIG.
By attaching a horizontal rolling compaction plate 83 to the frame 73 in place of the vertical diaphragm 78 and carrying out rolling compaction, it is possible to compact the backfilling material 3 above the intermediate portion.

(Effect of the invention) The construction method of claim 1 is a construction method in which a vertical diaphragm is vertically vibrated by a vibration hydraulic motor driven by a hydraulic power source mounted on a working machine, and then compacted by being pushed into a backfilling material. Compared to horizontal compaction plates, etc., vertical diaphragms can be easily inserted deep into narrow spaces between the abutment and the back surface of the bridge by operating the arm of the work equipment, and they can also be inserted using the hydraulic power source of the work equipment. Since compaction can be performed with a strong force, road sinking due to poor compaction can be prevented.

Furthermore, since it becomes possible to perform construction by backfilling with a thick layer of sand or gravel, construction efficiency is improved. Additionally, workers do not need to enter the compaction work area.

High work safety.

Also, when compacting the backfill material on both sides of a culvert, if the thick layer at the bottom is compacted evenly on both sides, it is possible to compact the backfill material on one side at a time, rather than on both sides of the upper layer.
There is no need to be careful.

In addition, according to the construction method of claim 2, compaction using the horizontal compaction plate can perform compaction comparable to compaction rollers,
There is no risk of damaging structures such as culverts.

[Brief explanation of the drawing]

Fig. 1 is a side view of a working machine showing an embodiment of the construction method of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view of a vibration compaction device used in the construction method of the embodiment, and Fig. 4 is the front view of Figure 3,
Figure 85 is a side view showing an example of compaction work for backfill material above the middle part, Figures 6, 7, and 8 (A), (B)
is a side view showing a conventional compaction method for backfilling material. Patent applicant: Ministry of Construction, Kinki Regional Construction Bureau, and one other agent Patent attorney: Masami Akimoto and one other person Figure 6 Figure 7

Claims (1)

[Claims] 1. When compacting deep backfill material on the back side of a structure such as an abutment, a vertical diaphragm attached to the end of the arm of a work machine is press-fitted into the backfill material, and the work machine A vibration device powered by a hydraulic motor operated by a hydraulic power source mounted on the
By pushing the vertical diaphragm while vertically vibrating it,
A compaction method for backfilling material on the back side of a structure, characterized by compacting the backfilling material. 2. Compaction of backfill material on the back side of a structure, characterized in that after compaction according to paragraph 1 is performed, the remaining backfill material on the upper part is compacted using a horizontal rolling plate attached to the arm. Construction method.