JP2021046744A - Multiple-spindle excavation machine - Google Patents

Abstract

To provide a multiple-spindle excavation machine in which constructions at various pitches and eccentric manner by just one excavation machine are made possible, only by diverting or partially improving currently used general equipment.SOLUTION: In a multiple-spindle excavation machine, a plurality of excavation rods 5 including an excavation head 5a at a tip end is connected with a driving mechanism 4 so as to face downwardly, and a pillory-like oscillation stopper having a through hole which the excavation rod vertically penetrates is provided at a leader mast. Since the excavation rod 5 is provided with a wobbling that is a joint margin per one joint, it can be bent in the range without resistance. The wobbling is used to bend the rod 5 with an axis in which pitch change and eccentric manner are desired. Thus, excavation at a plurality of pitches is made possible in one excavation machine.SELECTED DRAWING: Figure 1

Description

According to the present invention, a cement solution is injected into the ground from the tip of an excavation rod (auger) as an earth retaining wall or a water blocking wall at a civil engineering construction site, and mixed and stirred with earth and sand to form a soil cement solution. It is related to a multi-axis excavator used for construction to create a column-type underground continuous wall by hardening.

The multi-axis excavator used when constructing a continuous soil cement wall by the in-situ soil mixing method (SMW method) is also described in the following patent documents, but for example, as shown in FIGS. 17 and 18, a hydraulic motor and a reduction gear are used. The excavation rod (shaft) 5 is connected downward to the drive mechanism 4 composed of a machine, and a plurality of excavation rods 5 (three in the case of three axes) are arranged in parallel to prevent steady motion. It is bound by a binding band 9.
Japanese Unexamined Patent Publication No. 2007-255042

The excavation rod 5 is provided with an excavation head 5a at the tip thereof, and a stirring blade 5b with screw blades or flat blades intermittently provided in the middle.

Although not shown, the excavation rod 5 is used in multiple stages by connecting pieces with joints. The excavation rod 5 has a hollow shaft through which a consolidating liquid such as cement milk is circulated, and this can be poured out from the discharge port of the excavation head 5a.

The drive mechanism 4 is suspended and supported by a wire from the top sheave 3 of the leader mast 2 standing on a base machine 1 such as a crawler with the excavation rod 5 connected. Further, the drive mechanism 4 engages the curved bracket 6 provided on the back surface with the leader 7 provided along the leader mast 2. In the figure, reference numeral 8 denotes a neck shackle-shaped steady rest provided at the lower end of the leader mast 2, which has a through hole through which the excavation rod 5 penetrates up and down.

The excavation rod 5 is rotationally driven by the drive mechanism 4, and the excavation head 5a excavates in a cone-like shape. At the time of such excavation, a consolidation liquid such as cement milk is discharged from the excavation head 5a to in-situ soil in the soil. To create a soil cement wall for the leading element.

In the soil cement continuous wall construction method as described above, the excavation diameter may be different from the case where the normal diameter is φ550 to 650 mm @ 450 mm, the case where the large diameter is φ850 to 900 mm @ 600 mm, and the case where the ultra-large diameter is φ950 to 1100 mm @ 700 mm. Since each has a different pitch, an excavator (ogre) with three different pitches is required. In order to excavate these normal diameters, large diameters, and ultra-large diameters, an excavation head 5a suitable for the excavation is used.

Preparing excavators (augers) with different pitches puts a heavy burden on capital investment. If there is an eccentric auger (the excavation core is not a straight line but the shaft is arranged in a V shape), one unit can handle it, but such an excavator has not been commercially available or widely used.

An object of the present invention is to solve the inconvenience of the above-mentioned conventional example, and to make it possible to construct various pitches and eccentricize with one excavator by diverting or partially improving the general equipment currently used. The purpose is to provide a multi-axis excavator.

In order to achieve the above object, the present invention according to claim 1 connects a plurality of excavation rods having an excavation head at the tip downward to a drive mechanism, and provides a leader mast with a through hole through which the excavation rod penetrates up and down. In a multi-axis excavator equipped with a shackle-shaped steady rest, the excavation rod is provided with a backlash that is a margin for the joint at each joint, so if it is within that range, it can be bent without resistance, and this backlash can be removed. The gist is that it is possible to excavate multiple pitches with one excavator by using it to change the pitch and bend the rod of the shaft to be eccentric.

According to the first aspect of the present invention, since the excavation rod is provided with play (joint margin) at the joint portion, it can be bent without resistance within that range to excavate one unit. It is possible to excavate multiple pitches with a machine.

The gist of the present invention according to claim 2 is to increase the number of joints according to a required amount by using a short rod in multiple stages for a rod having a shaft to be changed in pitch or eccentric.

According to the second aspect of the present invention, by using a short rod in multiple stages and increasing the number of joints according to the required amount, it is possible to change the pitch or bend the rod more reliably than the rod of the shaft to be eccentric. it can.

The gist of the present invention according to claim 3 is that the steady rest has the through hole as the central hole and the left and right holes as long holes in the lateral direction.

According to the third aspect of the present invention, the steady rest is used by bending the excavation rods located on the left and right by making the through hole a long hole in the lateral direction with respect to the central hole. Can correspond to. As a result, it is possible to realize a case where the pitch is extended or a case where the pitch is decreased.

The gist of the present invention according to claim 4 is that the steady rest has a through hole as a long hole in the front-rear direction with respect to the left and right holes.

According to the fourth aspect of the present invention, the steady rest has an excavation rod located on the left and right and an excavation rod located in the center by making the through hole a long hole in the front-rear direction with respect to the left and right holes. And can be eccentric, and it is also possible to shift the rod of the shaft to be eccentric.

As described above, the multi-axis excavator of the present invention makes it possible to construct and eccentric various pitches with one excavator by diverting or partially improving the general equipment currently in use. Is what you do.

It is a front view of the pattern which extends the pitch which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a side view of the eccentric pattern which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the eccentric pattern of the multi-axis excavator of the present invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the eccentric pattern of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed by the eccentric pattern of the multi-axis excavator of the present invention. It is a front view of the pattern which reduces the pitch which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is explanatory drawing of the tip runout amount by only the joint play (ignoring the deflection). It is a front view of the excavation rod joint part. It is a front view which shows the gap of the excavation rod joint part. It is an enlarged front view which shows the gap of the excavation rod joint part. It is a side view which shows the outline of a multi-axis excavator. It is a front view which shows the outline of a multi-axis excavator.

Hereinafter, embodiments of the present invention will be described in detail with respect to the drawings. The outline of the multi-axis excavator is as described in FIGS. 17 and 18, and the excavation rod (shaft) 5 is connected downward to the drive mechanism 4 including the hydraulic motor and the speed reducer, and the excavator is connected downward. A plurality of the excavation rods 5 (three in the case of three axes) are arranged in parallel and bound by a binding band 9 for steady rest.

The excavation rod 5 is provided with an excavation head 5a at the tip thereof, and is provided with a stirring blade 5b having screw blades or flat blades intermittently in the middle. The stirring blade 5b is configured as an upper rod piece to which the excavation head 5a is connected. To.

The drive mechanism 4 is suspended and supported by a wire from the top sheave 3 of the leader mast 2 standing on a base machine 1 such as a crawler with the excavation rod 5 connected.

Further, the drive mechanism 4 engages the curved bracket 6 provided on the back surface with the leader 7 provided along the leader mast 2.

Further, a neck shackle-shaped steady rest 8 through which the excavation rod 5 penetrates vertically is provided by engaging with the leader 7. Although not shown, the steady rest 8 includes an intermediate one in addition to the one of the leader mast 2.

Normally, the leader length of a multi-axis excavator (pile driver) used for a continuous wall of soil cement can raise a maximum of 30 to 33 m unless there are site or sky restrictions, so when using 33 m, the excavation head 5a from below The equipment length of (head) + screw (excavation blade that also serves as a stirring blade with screw blades) + rod (screw blade, rod without excavation blade) is about 28 m excluding the length of the auger.

Actually, if a minimum of about 6.0 m is required for the head portion and the screw portion that form the wall (scraping and stirring the soil), the remaining rod portion will form about 22.0 m.

For rod and screw joints, there are SP6-80M type (manufacturer model number) that supports 80PS per rod and SP6-120M (manufacturer model number) that can handle up to 120ps. Considering this, it is possible to obtain a wide range of applications by considering SP6-120M (manufacturer's model number) as a reference.

FIG. 13 shows an example of the allocation of the excavation rod 5 of SP6-120M, in which four 10,000 (mm) pieces are connected.

14 to 16 show the situation of the joint portion. The male side convex portion 10 whose end is formed as a hexagonal surface or octagonal surface pillar body and the hexagonal surface or octagonal surface tubular female side concave portion. As a fitting with 11, it is further connected by a bar with a pin 12.

Since the SP6-120M has a backlash of 0.13 ° (margin of the joint) of 0.13 ° per joint from the time of manufacture, it can be bent without resistance if it is within that range.

In fact, it is a common case that the excavated part of the multi-axis machine is twisted and excavated during construction with the multi-axis machine, or it flows sideways. Is not damaged.

Using this backlash 13, the rod of the shaft to be pitch-changed or eccentric can be bent freely by increasing the number of joints according to the required amount by using a short rod in multiple stages.

FIG. 1 shows the case of a pattern for extending the pitch, and the excavation rod 5 is made easy to bend by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the left and right excavation rods 5 located on the outside are bent so as to project outward, and correspondingly, the intermediate steady rest 8 makes the through hole 14 the left and right holes with respect to the central hole as shown in FIG. The position of the excavation rod 5 was shifted inside as a long hole.

FIG. 3 shows the state of deviation, and FIG. 4 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

FIG. 5 shows the case of an eccentric pattern. Similarly, the excavation rod 5 can be easily bent by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the excavation rod 5 located at the center was bent so as to project toward the front side.

The steady rest 8 in the middle has the through hole 14 as the central hole and the left and right holes as long holes so that the excavation rod 5 is displaced.

Correspondingly, as shown in FIG. 6, the intermediate steady rest 8 has a through hole 14 as a long hole in the front-rear direction with respect to the left and right holes.

FIG. 7 shows the state of deviation, and FIG. 8 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

FIG. 9 shows the case of a pattern for extending the pitch, and the excavation rod 5 is easy to bend by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the left and right excavation rods 5 located on the outside were bent so as to be retracted inward.

As shown in FIG. 10, the intermediate steady rest 8 has the through hole 14 as a long hole on the left and right with respect to the central hole, and the position of the excavation rod 5 is shifted inside.

FIG. 11 shows the state of deviation, and FIG. 12 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

1 ... Base machine 2 ... Leader mast 3 ... Top sheave 4 ... Drive mechanism 5 ... Excavation rod 5a ... Excavation head 5b ... Stirring blade 6 ... Curved bracket 7 ... Leader 8 ... Anti-sway 9 ... Binding band 10 ... Male side convex part 11 ... Cylinder female side recess 12 ... Pin 13 ... Play 14 ... Through hole 15 ... Soil cement pillar 16 ... Core material

According to the present invention, a cement solution is injected into the ground from the tip of an excavation rod (auger) as an earth retaining wall or a water blocking wall at a civil engineering construction site, and mixed and stirred with earth and sand to form a soil cement solution. It is related to a multi-axis excavator used for construction to create a column-type underground continuous wall by hardening.

The multi-axis excavator used when constructing a continuous soil cement wall by the in-situ soil mixing method (SMW method) is also described in the following patent documents, but for example, as shown in FIGS. 17 and 18, a hydraulic motor and a reduction gear are used. The excavation rod (shaft) 5 is connected downward to the drive mechanism 4 composed of a machine, and a plurality of excavation rods 5 (three in the case of three axes) are arranged in parallel to prevent steady motion. It is bound by a binding band 9.
Japanese Unexamined Patent Publication No. 2007-255042

The excavation rod 5 is provided with an excavation head 5a at the tip thereof, and a stirring blade 5b with screw blades or flat blades intermittently provided in the middle.

Although not shown, the excavation rod 5 is used in multiple stages by connecting pieces with joints. The excavation rod 5 has a hollow shaft through which a consolidating liquid such as cement milk is circulated, and this can be poured out from the discharge port of the excavation head 5a.

The drive mechanism 4 is suspended and supported by a wire from the top sheave 3 of the leader mast 2 standing on a base machine 1 such as a crawler with the excavation rod 5 connected. Further, the drive mechanism 4 engages the curved bracket 6 provided on the back surface with the leader 7 provided along the leader mast 2. In the figure, reference numeral 8 denotes a neck shackle-shaped steady rest provided at the lower end of the leader mast 2, which has a through hole through which the excavation rod 5 penetrates up and down.

The excavation rod 5 is rotationally driven by the drive mechanism 4, and the excavation head 5a excavates in a cone-like shape. At the time of such excavation, a consolidation liquid such as cement milk is discharged from the excavation head 5a to in-situ soil in the soil. To create a soil cement wall for the leading element.

In the soil cement continuous wall construction method as described above, the excavation diameter may be different from the case where the normal diameter is φ550 to 650 mm @ 450 mm, the case where the large diameter is φ850 to 900 mm @ 600 mm, and the case where the ultra-large diameter is φ950 to 1100 mm @ 700 mm. Since each has a different pitch, an excavator (ogre) with three different pitches is required. In order to excavate these normal diameters, large diameters, and ultra-large diameters, an excavation head 5a suitable for the excavation is used.

Preparing excavators (augers) with different pitches puts a heavy burden on capital investment. If there is an eccentric auger (the excavation core is not a straight line but the shaft is arranged in a V shape), one unit can handle it, but such an excavator has not been commercially available or widely used.

An object of the present invention is to solve the inconvenience of the above-mentioned conventional example, and to make it possible to construct various pitches and eccentricize with one excavator by diverting or partially improving the general equipment currently used. The purpose is to provide a multi-axis excavator.

In order to achieve the above object, the present invention according to claim 1 connects a plurality of excavation rods having an excavation head at the tip downward to a drive mechanism, and provides a leader mast with a through hole through which the excavation rod penetrates up and down. In a multi-axis excavator provided with a shackle-shaped steady rest, the steady rest has a through hole as a central hole and a left and right hole as a laterally elongated hole, or a through hole as a left and right hole. On the other hand, the hole in the center is a long hole in the front-rear direction, and the excavation rod has a play that is a margin for the joint at each joint, so if it is within that range, it can be bent without resistance, and this play is used. The gist is that the rod of the shaft to be changed or eccentric is bent, which enables excavation of multiple pitches with one excavator.

According to the first aspect of the present invention, since the excavation rod is provided with play (joint margin) at the joint portion, it can be bent without resistance within that range to excavate one unit. It is possible to excavate multiple pitches with a machine.

The steady rest can be used by bending the excavation rods located on the left and right by making the through hole a long hole in the lateral direction with respect to the central hole. As a result, it is possible to realize a case where the pitch is extended or a case where the pitch is decreased.

Alternatively, the steady rest can eccentric the excavation rods located on the left and right and the excavation rod located in the center by making the through hole a long hole in the front-rear direction with respect to the left and right holes. It can also be used when shifting the rod of the shaft to be eccentric.

The gist of the present invention according to claim 2 is to increase the number of joints according to a required amount by using a short rod in multiple stages for a rod having a shaft to be changed in pitch or eccentric.

According to the second aspect of the present invention, by using a short rod in multiple stages and increasing the number of joints according to the required amount, it is possible to change the pitch or bend the rod more reliably than the rod of the shaft to be eccentric. it can.

As described above, the multi-axis excavator of the present invention makes it possible to construct and eccentric various pitches with one excavator by diverting or partially improving the general equipment currently in use. Is what you do.

It is a front view of the pattern which extends the pitch which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed in the pattern which extends the pitch of the multi-axis excavator of this invention. It is a side view of the eccentric pattern which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the eccentric pattern of the multi-axis excavator of the present invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the eccentric pattern of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed by the eccentric pattern of the multi-axis excavator of the present invention. It is a front view of the pattern which reduces the pitch which shows one Embodiment of the multi-axis excavator of this invention. It is a top view of the intermediate steady rest used in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is a top view which shows the relationship between the stirring blade and the excavation rod in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is a top view of the soil cement continuous wall constructed in the pattern which reduces the pitch of the multi-axis excavator of this invention. It is explanatory drawing of the tip runout amount by only the joint play (ignoring the deflection). It is a front view of the excavation rod joint part. It is a front view which shows the gap of the excavation rod joint part. It is an enlarged front view which shows the gap of the excavation rod joint part. It is a side view which shows the outline of a multi-axis excavator. It is a front view which shows the outline of a multi-axis excavator.

Hereinafter, embodiments of the present invention will be described in detail with respect to the drawings. The outline of the multi-axis excavator is as described in FIGS. 17 and 18, and the excavation rod (shaft) 5 is connected downward to the drive mechanism 4 including the hydraulic motor and the speed reducer, and the excavator is connected downward. A plurality of the excavation rods 5 (three in the case of three axes) are arranged in parallel and bound by a binding band 9 for steady rest.

The excavation rod 5 is provided with an excavation head 5a at the tip thereof, and is provided with a stirring blade 5b having screw blades or flat blades intermittently in the middle. The stirring blade 5b is configured as an upper rod piece to which the excavation head 5a is connected. To.

The drive mechanism 4 is suspended and supported by a wire from the top sheave 3 of the leader mast 2 standing on a base machine 1 such as a crawler with the excavation rod 5 connected.

Further, the drive mechanism 4 engages the curved bracket 6 provided on the back surface with the leader 7 provided along the leader mast 2.

Further, a neck shackle-shaped steady rest 8 through which the excavation rod 5 penetrates vertically is provided by engaging with the leader 7. Although not shown, the steady rest 8 includes an intermediate one in addition to the one of the leader mast 2.

Normally, the leader length of a multi-axis excavator (pile driver) used for a continuous wall of soil cement can raise a maximum of 30 to 33 m unless there are site or sky restrictions, so when using 33 m, the excavation head 5a from below The equipment length of (head) + screw (excavation blade that also serves as a stirring blade with screw blades) + rod (screw blade, rod without excavation blade) is about 28 m excluding the length of the auger.

Actually, if a minimum of about 6.0 m is required for the head portion and the screw portion that form the wall (scraping and stirring the soil), the remaining rod portion will form about 22.0 m.

For rod and screw joints, there are SP6-80M type (manufacturer model number) that supports 80PS per rod and SP6-120M (manufacturer model number) that can handle up to 120ps. Considering this, it is possible to obtain a wide range of applications by considering SP6-120M (manufacturer's model number) as a reference.

FIG. 13 shows an example of the allocation of the excavation rod 5 of SP6-120M, in which four 10,000 (mm) pieces are connected.

14 to 16 show the situation of the joint portion. The male side convex portion 10 whose end is formed as a hexagonal surface or octagonal surface pillar body and the hexagonal surface or octagonal surface tubular female side concave portion. As a fitting with 11, it is further connected by a bar with a pin 12.

Since the SP6-120M has a backlash of 0.13 ° (margin of the joint) of 0.13 ° per joint from the time of manufacture, it can be bent without resistance if it is within that range.

In fact, it is a common case that the excavated part of the multi-axis machine is twisted and excavated during construction with the multi-axis machine, or it flows sideways. Is not damaged.

Using this backlash 13, the rod of the shaft to be pitch-changed or eccentric can be bent freely by increasing the number of joints according to the required amount by using a short rod in multiple stages.

FIG. 1 shows the case of a pattern for extending the pitch, and the excavation rod 5 is made easy to bend by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the left and right excavation rods 5 located on the outside are bent so as to project outward, and correspondingly, the intermediate steady rest 8 makes the through hole 14 the left and right holes with respect to the central hole as shown in FIG. The position of the excavation rod 5 was shifted inside as a long hole.

FIG. 3 shows the state of deviation, and FIG. 4 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

FIG. 5 shows the case of an eccentric pattern. Similarly, the excavation rod 5 can be easily bent by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the excavation rod 5 located at the center was bent so as to project toward the front side.

The steady rest 8 in the middle has the through hole 14 as the central hole and the left and right holes as long holes so that the excavation rod 5 is displaced.

Correspondingly, as shown in FIG. 6, the intermediate steady rest 8 has a through hole 14 as a long hole in the front-rear direction with respect to the left and right holes.

FIG. 7 shows the state of deviation, and FIG. 8 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

FIG. 9 shows the case of a pattern for extending the pitch, and the excavation rod 5 is easy to bend by using short objects such as 3,000 (mm), 1,000 (mm), and 5,000 (mm) in multiple stages. Then, the left and right excavation rods 5 located on the outside were bent so as to be retracted inward.

As shown in FIG. 10, the intermediate steady rest 8 has the through hole 14 as a long hole on the left and right with respect to the central hole, and the position of the excavation rod 5 is shifted inside.

FIG. 11 shows the state of deviation, and FIG. 12 shows the arrangement of the soil cement pillar 15 and the core material 16 constructed in FIG.

1 ... Base machine 2 ... Leader mast 3 ... Top sheave 4 ... Drive mechanism 5 ... Excavation rod 5a ... Excavation head 5b ... Stirring blade 6 ... Curved bracket 7 ... Leader 8 ... Anti-sway 9 ... Binding band 10 ... Male side convex part 11 ... Cylinder female side recess 12 ... Pin 13 ... Play 14 ... Through hole 15 ... Soil cement pillar 16 ... Core material

Claims (4)

In a multi-axis excavator in which a plurality of excavation rods having an excavation head at the tip are connected to a drive mechanism downward and a shackle-shaped steady rest having a through hole through which the excavation rod penetrates up and down is provided in the leader mast. Since the excavation rod is provided with a play that is a margin for the joint per joint, it can be bent without resistance if it is within that range, and this play can be used to bend the rod of the shaft that you want to change the pitch or eccentric. This is a multi-axis excavator that enables excavation of multiple pitches with a single excavator. The multi-axis excavator according to claim 1, wherein the number of joints is increased according to the required amount by using a short rod in multiple stages for changing the pitch or eccentricity of the rod. The multi-axis excavator according to claim 1 or 2, wherein the steady rest is a long hole in the lateral direction with the through hole as the central hole and the left and right holes as long holes in the lateral direction. The multi-axis excavator according to claim 1 or 2, wherein the steady rest is an elongated hole in the center of the left and right holes with respect to the left and right holes.

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