JPS58101930A - Excavator - Google Patents

Abstract

PURPOSE:To permit the placement of a continuous pillar-row sheating wall by allowing the turning of a side rod to any position at a center rod as a supporting point. CONSTITUTION:The upper ends of two center rods 4 whose axial centers are matched on a straight line are rotatably supported on a slider 3 provided to a leader mast 1, side rods 5 movable to a given position at the rods 4 as supporting points are provided on both sides of the rods 4, stirring augers 12 and 13 are provided to the lower ends of the rods 4 and 5, and the gears 16 of the rods 4 driven by a driver 15 are engaged with the gears 8 of the rods 5 through an intermediate gear 17. The rods 5 are stopped at a given angle to straight line leading to the axial centers of the rods 4, excavation is made, and then the rods 4 and 5 are drawn out, whereupon a pillar-row soil cement pile A of a semicircular form is formed. In the same way, a cement pile A' is placed to form a continuous pillar-row sheating wall B of a round form.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavator for constructing a continuous column earth retaining wall.

Recently, when constructing an underground structure, an auger screw or a rod having an auger screw only at the tip is used to excavate from the ground to a specified depth underground. While injecting cement milk or a hydraulic solution through a certain hole, the cement milk or hydraulic solution is stirred and kneaded with the excavated soil to form a soil cement pile, and the soil retention is achieved by driving a continuous row of columns of these fill cement piles. A wall is being built.

However, since the conventional auger screw or rod is a single-shaft type, it has to be installed one by one, which is inefficient and requires a long time to install.

Therefore, a multi-shaft system with three or more shafts was developed to shorten the construction period.

In this case, since the axis of each auger screw or rod is located on a straight line, it is not possible to construct a circular continuous column retaining wall.

For this reason, there was a drawback that an inefficient single-shaft method had to be adopted in which the fill cement piles were driven one by one in an orderly manner.

This invention solves the above-mentioned drawbacks by making it possible to construct a continuous column retaining wall of circular fill cement piles using a multi-axis method to prepare hard piles for water and sewage pipe shield construction, cast-in-place foundation piles, etc. It is intended to.

The present invention provides an excavator that can freely change the angle of a part of the center rod, such as multi-axis excavation rods on both sides, to create a circular continuous pillar row earth retaining wall. There is a particular thing.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a leader mast that supports a traveling carriage 2G, and a slider 3 that moves up and down using the leader mast 1 as a guide is provided on the front surface of this leader mast 1.

Further, the slider 3 rotatably supports the upper ends of two or more parallel center rods 4 whose axes are aligned on a straight line in the left-right direction.

Further, on both sides of the center rod 4, one or more rods are arranged in parallel with the same spacing as the center rods 4, and the center rods 4 on the sides are moved to a predetermined position using the center rods 4 on the sides as a fulcrum. A side rod 5 that can be used is provided.

As shown in the figure, a stationary protruding member 6 is provided on the lower front surface of the leader mast 1, and the center rod 4 is inserted through a vertical hole 7 provided in the protruding member 6. A vertical accuracy of 4 can be obtained.

In addition, in the illustrated case, the method of moving the side rod 5 is to attach the ends of links 8.9 to the upper ends of the center rods 5 on both sides, and to the upper and lower portions sandwiching the protruding member 6, respectively, so as to rotate at fixed positions. At the same time, the side rod 5 is passed through the tip of the link 8.9, and the link 8 and the slider 3 are connected to each other.
Both ends of cylinders 10 and 11 are rotatably attached to the link 9 and the projecting member 6, respectively, so that the side rod 5 is moved by the forward and backward movements of the cylinders 10 and 11.

Furthermore, auger screws 12.13 are provided at the lower ends of the center rod 4 and side rods 5, and between the upper end of the center rod 4 and the lower end of the auger screw 12, and between the upper end of the side rod 5 and the lower end of the auger screw 13. A through hole 14 is provided in the axis between the two.

Cement milk and hydraulic solution are supplied to the above-mentioned through hole 14 from hoses connected to the upper ends of the center rod 4 and side rods 5.

Furthermore, the center rod 4 and the side rods 5 are each driven in the same direction.

In the case shown in the figure, two driving machines 15 for driving the center rod 4 are built into the slider 3, and an intermediate gear 1 is connected to a gear 16 fixed to the center rod 4.
The gears fixed to the side rod 5 through the gear 7 are engaged with each other.

In the figure, 19 is a wire that raises and lowers the slider 3 by winding and unwinding, 20 is a wire that supports the protruding member 6 in the static IE state, 21 is a guide rail provided on the leader mast 1, and 22 is fitted into the rail 21. It is a sliding member.

The excavator according to the present invention has the above-mentioned configuration. Next, a method for constructing a circular continuous column row earth retaining wall will be described. First, the tip of the link 8.9 is Then, the side rods 5 are stopped so as to form a predetermined inclination angle with respect to the straight line connecting the axes of the center rods 4.

After installing the center rod 4 and side rods 5 at the excavation point, the driving center rod 4 and side rods 5 are used to excavate from the ground to the underground. Cement milk or hydraulic solution is injected from the tip of the auger screw 12.13 using the auger screw 12. After that, by pulling out the center rod 4 and the side rods 5, the columns 1711 arranged in a semicircular arc shape are removed.
fill cement pile A will be driven.

Thereafter, the tip of the cylinder 8.9 of the cylinder 10.11 is pulled back, and the side rod 5 is stopped at a predetermined inclination angle with respect to the straight line connecting the axes of the center rod 4.

After installing the center rod 4 and the side rods 5 so that the peripheral edges of the auger screws 13 on both sides overlap the circumferential surfaces of the soil cement piles A on both sides of the soil cement column A that has been cast, the above-mentioned Fill cement piles A' in column rows arranged in a semicircular arc in the same manner as
Then, as shown in Fig. 5, a circular continuous column earth retaining wall B is constructed.

By aligning the axes of the side rods 5 with the straight line connecting the axes of the center rod 4 and driving fill cement piles on all sides, a continuous rectangular pillar row earth retaining structure can be created as shown in Fig. 6. Wall B' can be constructed.

By moving the side rods 5 to the front and rear sides of the center rod 4, it is possible to construct a circular continuous pillar row earth retaining wall without moving the traveling cart 2 to the opposite side.

As described above, according to the excavator according to the present invention, since the side rods are provided on both sides of the center rod and rotate about the side center rods as fulcrums, the predetermined inclination with respect to the straight line connecting the axes of the center rods is provided. By moving the side rods so as to form an angle, it is possible to drive continuous soil cement piles arranged in a substantially semicircular planar shape.

Therefore, by driving successive soil cement piles arranged in the following semicircular arc shape, it is possible to construct an earth retaining wall with a circular series of columns.

Furthermore, by aligning the axes of the side rods with a straight line connecting the axes of the center rods, soil cement columns can be placed in a straight line.

Therefore, it is also possible to construct a continuous column-row earth retaining wall along the excavation line of the underground structure.

[Brief explanation of drawings]

The drawing shows an embodiment of an excavator according to the present invention.
Figure 1 is a side view, Figure 2 is an enlarged front view of the same as above, Figures 3 and 4 are cross-sectional plan views showing the main parts of the above, Figures 5 and 6 are cross-sections of the constructed earth retaining wall. FIG. 1...Leader mast, 3...Slider, 4...
Center rod, 5... Side rod, 12.13.
・Auger screw patent applicant Satoshi Enoki Hiroshi Enoki
Agent Kama 1) Letter 2 Procedural Amendment (acid) February 3, 1980 To the Commissioner of the Patent Office Shimada? 'Judono 1, Indication of the case 1982 Patent Application No. 202076 2, Name of the invention Excavator 3, Person making the amendment Relationship to the case Patent applicant address 1-19-3-701 Hakata Ekimae, Hakata-ku, Fukuoka City
1n(S”° Enoki Toshio ()'!
d, 18) 4. Agent 5゜Showa Year Month/Date (Delivery date) Contents of amendment as shown in the attached sheet 1. The entire specification will be amended in the attached sheet. Details - 1. Title of the invention: Excavator 2. Scope of claims 1.
A slider that rises and lowers on the leader mast of the traveling platform army, and two center rods that are placed side by side with their upper ends supported by this slider and driven with their axes aligned on a straight line in the left and right direction. , the side rods are arranged parallel to each other on both sides of the center rod and are driven, and are provided so that they can rotate to the +1 position using the center rod as a fulcrum, and the stirring rods are provided at the lower ends of the center rod and the side rods. An excavator consisting of an auger, a side rod, and a through hole provided from the upper end of the center rod to the tip of the stirring auger. 3. Detailed Description of the Invention The present invention relates to an excavator for constructing a continuous column row earth retaining wall. Recently, when excavating underground structures eastward, a stirring auger or a rod with a stirring auger only at the tip is used to excavate from the ground to a predetermined depth underground. The cement mill or hydraulic solution is injected into the cement mill or hydraulic main solution using the through hole as a fill cement pile, and the excavated soil is stirred and kneaded to form a fill cement pile. An earth retaining wall is being created by pouring. However, since the conventional stirring auger or rod is a single-shaft type, it has to be installed one by one, which is inefficient and requires a long time to install. Therefore, a multi-shaft system with three or more shafts was developed to shorten the construction period. In this case, since the axes of each stirring auger or rod are located on a straight line, it is not possible to construct a circular continuous column retaining wall. For this reason, there was a drawback in that an inefficient single-shaft method had to be adopted, in which soil cement piles were driven one by one in an orderly manner. This invention solves the above-mentioned drawbacks by making it possible to construct a continuous column retaining wall of circular fill cement piles using a multi-axis method for preparing hard piles for shield construction of water and sewage pipes, cast-in-place foundation piles, etc. The purpose is to eliminate the The present invention provides an excavator that constructs a circular continuous pillar row earth retaining wall by allowing the angles of the multi-axis excavation rods on both sides to be freely changed with respect to a part of the central rod. There is a particular thing. Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a leader mast supported on a traveling cart 2, and a slider 3 is provided on the front surface of the leader mast 1 to move up and down using the leader mast 1 as a guide. Further, the slider 3 rotatably supports the upper ends of two parallel center rods 4 whose axes are aligned on a straight line in the left-right direction. Further, on both sides sandwiching the center rod 4, one side is arranged in parallel with the same distance as the center rod 4, and the side center rod 4 can be moved to a predetermined position using the center rod 4 on the side as a fulcrum. A rod 5 is provided. In addition, as shown in the figure, a protruding member 6 that is stationary on the lower part of the leader mast 1...J plane is provided, and this protruding member 6
By allowing the center rod 4 to pass through the vertical hole 7 provided in the vertical hole 7, vertical accuracy of the center rod 4 can be obtained. In addition, in the illustrated case, the method of moving the side rod 5 is to attach the ends of links 8.9 to the upper ends of the center rod 5 on both sides and the upper and lower portions that sandwich the protruding member 6, respectively, so as to rotate at fixed positions. At the same time, the side rod 5 is passed through the tip of the link 8.9, and the link 8 and the slider 3 are connected to each other.
Both ends of cylinders 10 and 11 are rotatably attached to the link 9 and the projecting member 6, respectively, so that the side rod 5 is moved for the forward and backward movements of the cylinders 10 and 11. Furthermore, stirring augers 12 and 13 are provided at the lower ends of the center rod 4 and side rods 5, and between the upper end of the center rod 4 and the lower end of the stirring auger 12 and between the upper end of the side rod 5 and the lower end of the stirring auger 13. A through hole 14 is provided in the axial center. Cement milk and hydraulic solution are supplied to the above-mentioned through hole 14 from hoses connected to the upper ends of the center rod 4 and side rods 5. Furthermore, the center rod 4 and the side rods 5 are each driven in the same direction. In the case shown in the figure, two driving machines 16 for driving the center rod 4 are built into the slider 3, and an intermediate force 1 is connected to a gear 16 fixed to the center rod 4.
A gear 18 fixed to the side rod 5 is engaged with the gear 18 via a gear 7. In the figure, 19 is a wire that raises and lowers the slider 8 by unwinding, 20 is a wire that supports the protruding member 6 in a stationary state, 21 is a guide rail provided on the leader mast 1, and 22 is a wire/I/21. It is a sliding member that fits into the The excavator according to the present invention has the above-mentioned configuration. Next, a method for constructing a continuous circular pillar-row earth retaining wall will be described. First, the tips of the links 8 and 9 are Then, the side rods 5 are stopped so as to form a predetermined oblique angle to the straight line connecting the axes of the center rods 4. After installing the center rod 4 and side rods 5 at the excavation point, the driving center rod 4 and side rods 5 excavate from the ground into the ground, and the through hole 14 is opened along with the above excavation. Cement milk or hydraulic solution is injected from the tip of the stirring auger 12.13 to stir and knead the soil and cement milk or hydraulic solution, and after the excavation reaches a predetermined depth (supporting layer), By pulling out the center rod 4 and the side rods 5, fill cement piles A are driven in columns arranged in a semicircular arc shape. Thereafter, the cylinders 10 and 11 are operated backward to pull back the tips of the cylinders 8 and 9, and the side rods 5 are stopped at a predetermined inclination angle with respect to the straight line connecting the axes of the center rod 4. Therefore, the stirring augers 1 on both sides of the soil cement pile A on both sides of the soil cement column A that have been driven are
After erecting the center rod 4 and the side rods 5 so that the peripheral edges of 3 overlap, soil cement piles A' in columns arranged in a semicircular arc are driven in the same manner as described above. As shown in , circular continuous column earth retaining wall B
Create. By aligning the axes of the side rods 5 with the straight line connecting the axes of the center rod 4 and driving fill cement piles on the four sides, a rectangular continuous column can be formed as shown in Fig. 6. A row of earth retaining walls B' can be constructed. Note that by moving the side rods 5 to the front and rear sides of the center rod 4, it is possible to construct a circular continuous pillar row earth retaining wall without moving the traveling cart 2 to the opposite side. As described above, according to the excavator according to the present invention, since the side rods are provided on both sides of the center rod and rotate about the center rod as a fulcrum, a predetermined angle of 1. Continuous fill cement piles arranged in a substantially semicircular planar shape can be driven by turning the side rods so as to form an oblique angle. Therefore, by driving successive soil cement piles arranged in the following semicircular arc shape, it is possible to construct an earth retaining wall with a circular series of columns. Furthermore, by aligning the axes of the side rods with the axis connecting the axes of the center rods, it is possible to cast soil cement columns arranged in a straight line. Therefore, it is also possible to construct a continuous column-row earth retaining wall along the excavation line of the underground structure. 4. Brief description of the drawings The drawings show one embodiment of the excavator according to the present invention.
Figure 1 is a side view, Figure 2 is an enlarged IE view of the same as above, Figures 3 and 3 are cross-sectional plan views showing the main parts of the above, Figures 5 and 6 are of the constructed earth retaining wall. FIG. 1...Leader mast, 3...Slider, 4...
Center rod, 5...Side rod, 12, 13...
・Agitation auger

Claims (1)

[Claims] A slider installed on the leader mast of a traveling truck that moves up and down, and two or more sliders installed in parallel with their axes aligned on a straight line in the left-right direction, with the upper end supported by this slider and driven in one direction. The center rod is arranged in parallel on both sides sandwiching this center rod, and is driven in one direction.
A side rod that can be moved to a predetermined position using the side center rod as a fulcrum, an auger screw provided at the lower end of the center rod and side rod, and an auger screw provided from the upper end of the side rod and center rod to the tip of the auger screw. An excavator consisting of a through hole.