JP7182991B2 - Structure embedding method - Google Patents

Description

The present invention relates to a structure burying method for burying a structure in the ground using an excavator .

Conventionally, there is known a structure burying method of burying a pile material in an excavation hole formed in the ground using a chain cutter excavator (Patent Documents 1 and 2).
In the invention described in Patent Document 1, a drilling rig is guided into the ground along an existing pile buried in the ground along a guide member to drill a drilling hole adjacent to the existing pile, and then, A plurality of piles are continuously buried in the ground by pulling up the excavator from the ground and then burying the piles in the excavation holes.
In the invention described in Patent Document 2, a chain cutter type drilling device is arranged so as to drill a drill hole at a position adjacent to an existing pile material already buried in the ground, and then chain cutter type drilling is performed. With the lower end of the device as a fulcrum, the chain cutter type excavator is tilted by separating the upper end side of the chain cutter type excavator from the existing pile material, and further, the existing pile material and the chain cutter type excavator. By burying a new pile material in the ground along with the existing pile material from the gap, the newly buried pile material pushes the lower end of the chain cutter type drilling rig to excavate the next hole. do.

JP 2007-255148 A JP 2009-155882 A

However, in the invention described in Patent Document 1, since an excavation hole is formed for each pile material to be buried, the excavation device is pulled out of the ground each time the excavation hole is excavated, and excavated to the next excavation position. There is a problem that the apparatus has to be moved, and the work of burying the pile material becomes complicated, and the work of burying the pile material takes time.
In the invention described in Patent Document 2, by inserting a new pile material between the existing pile material and the chain cutter type excavator, the lower end of the excavator is pushed out, so that the pile material has a predetermined Various conditions are imposed, such as the need for shape and rigidity, the inability to excavate forward with the excavator alone, and the need for force to insert the pile material.
That is, when attempting to bury the elements constituting the buried structure in the ground, the burial space is not sufficiently opened and must be expanded by the elements. Therefore, the element is subject to restrictions such as a predetermined shape and rigidity for expanding, and the degree of freedom in the configuration of the buried structure is reduced.
The excavator itself cannot move forward excavation to widen the hole in the ground in the horizontal direction. I need to get some momentum.
In addition, heavy machinery is required to push the pile material between the existing pile material and the chain cutter type excavator, as it requires a considerable amount of force. In order to efficiently perform the above, the applicable heavy machinery such as a special pile press-in machine as described in Patent Document 2 is limited.

The present invention has been made in view of the above-mentioned problems in the prior art. The object of the present invention is to continuously bury a structure in the hole while excavating and extending it laterally with a strong excavating ability.

The invention according to claim 1 for solving the above problems is an excavating part of a chain cutter type that circulates a chain cutter having a cutter for scraping the ground on the outer peripheral part,
a propulsion drive coupled to the excavation section;
The propulsion drive section is arranged adjacent to the outer peripheral section, and the opposite end of the propulsion drive section to the end on the outer peripheral side is arranged away from the outer peripheral section along the direction away from the outer peripheral section. The excavating device is configured to be capable of driving the push-out operation and the pull-in operation so as to approach the outer peripheral portion.

The excavating apparatus may have a configuration in which the propulsion drive unit is provided adjacent to the construction section of the chain cutter between two sprockets.

The excavating apparatus may have a configuration in which a plurality of the propulsion drive units are arranged side by side along the installation direction of the chain cutter in the installation section.

The excavator is
The plurality of propulsion drive units have ends facing the chain cutter fixed to a common housing case,
The housing case is elongated in the installation direction, holds the plurality of propulsion drive units at predetermined intervals in the installation direction, and has a width within the excavation width of the chain cutter . may be

The excavating apparatus may be configured such that the excavating section and the housing case are connected via a guide, and the relative position of the excavating section and the housing case in the construction direction can be changed.

The excavating apparatus may have a structure in which cover plates extend from both sides of the housing case in a direction opposite to the excavation section side.

In the excavating apparatus, the excavating section may have a plurality of the chain cutters arranged in parallel, and may be connected to the propulsion drive section via a member passed between the plurality of chain cutters.

The invention according to claim 1 is a structure burying method for continuously burying a structure in a hole formed in the ground using an excavating device while extending the hole in the ground in the lateral direction by the excavating device,
While excavating the inner wall portion on the extension side of the hole by the excavating portion, the opposite end portion of the propulsion drive portion is pushed out, and the inner wall portion on the opposite side to the inner wall portion on the extension side is pushed out by the propulsion drive portion directly or via an object. an excavation step of moving the excavation portion to the extension side of the hole by pressing with the
a space opening step of drawing in the opposite end portion of the propulsion drive portion to provide a space between the opposite inner wall portion or object pressed by the propulsion drive portion in the excavation step and the opposite end portion;
an burying step of burying the constituent elements of the structure in the space to form the object;
In the structure burying method, the structure is continuously buried in the hole while extending the hole in the horizontal direction by repeating the excavation step, the space opening step, and the burying step multiple times in this order.

Furthermore, according to the first aspect of the present invention, the structure is a continuous wall made up of a plurality of piles, and the constituent elements are piles .

Furthermore, the invention according to claim 1 uses a pile press-in machine in which the excavation device can be connected to a chuck part that grips the pile material and moves up and down,
The pile press-in machine includes a clamp that grips the upper end of the existing pile material, and the chuck part is movable back and forth with respect to the clamp,
In the excavation step, the excavation device is connected to the chuck portion, and the vertical position of the excavation portion is held by the pile press-in machine .
The invention according to claim 2 is the structure burying method according to claim 1, wherein the excavation apparatus is provided with the single propulsion drive unit.
The invention according to claim 3 is the structure burying method according to claim 2, wherein the propulsion drive unit is arranged below the middle of the excavator in the vertical direction.

The invention according to claim 4 is the structure burying method according to claim 1, wherein the excavation apparatus includes a plurality of the propulsion drive units.
The invention according to claim 5 is the structure burying method according to claim 4, wherein the excavation apparatus is provided with the propulsion drive units at a plurality of positions including at least a lower center of the excavation apparatus in the vertical direction.

According to the present invention, since the excavating apparatus has a function of advancing the excavating section by itself by the push-out operation of the propulsion drive unit connected to the excavating section, the excavating apparatus presses the side surface of the underground structure or the hole to move it laterally. It is possible to carry out a structure burying method in which structures are continuously buried in the hole by obtaining a reaction force in the direction and by horizontally excavating and extending even a hole in hard ground with a strong excavating ability. Therefore, it is possible to efficiently and smoothly continue the construction method while improving the degree of freedom in the construction of the buried structure without pulling out the excavating device from the hole.

FIG. 2 is an implementation situation diagram of the structure burying method showing the right side of the excavating apparatus according to one embodiment of the present invention. 1 is a front view of an excavating apparatus according to an embodiment of the present invention; FIG. FIG. 2 is a top view of an excavating device and piles corresponding to the implementation situation of FIG. 1; FIG. 2 is an implementation situation diagram of the structure burying method showing the right side of the excavating apparatus according to one embodiment of the present invention. FIG. 5 is a top view of an excavator and piles corresponding to the implementation situation of FIG. 4; FIG. 2 is an implementation situation diagram of the structure burying method showing the right side of the excavating apparatus according to one embodiment of the present invention. FIG. 7 is a top view of an excavating device and a pile corresponding to the implementation situation of FIG. 6; FIG. 2 is an implementation situation diagram of the structure burying method showing the right side of the excavating apparatus according to one embodiment of the present invention. FIG. 9 is a top view of an excavator and a concrete wall corresponding to the implementation situation of FIG. 8; FIG. 2 is an implementation situation diagram of a structure burying method showing the right side of an excavating device and a pile press-in machine according to an embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention; FIG. 10 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus according to another embodiment of the present invention;

An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

[Overview of tunneling equipment]
First, the excavating apparatus of this embodiment will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is an implementation situation diagram of a structure burying method showing the right side of an excavating apparatus 1 of this embodiment. FIG. 2 is a front view of the excavating apparatus 1 of this embodiment. Note that the excavated surface side is the front. 3 is a top view of an excavator and piles corresponding to the implementation situation of FIG. 1. FIG.

The excavating apparatus 1 of this embodiment includes a chain cutter type excavating section 10 and a jack 20 as a propulsion driving section.
The excavation section 10 includes a frame post 11 extending in the vertical direction, a drive sprocket 12 arranged at the upper end of the frame post 11 and rotated by driving a drive motor 13 , and arranged at the lower end of the frame post 11 . A chain cutter comprising a driven sprocket 14, an endless chain 15a stretched over the drive sprocket 12 and the driven sprocket 14 and arranged along the outer circumference of the frame post 11, and a cutter bit 15b arranged on the outer circumference thereof. 15.

As shown, the excavating section 10 has two chain cutters 15L and 15R in parallel.
The left drive sprocket 12L, driven sprocket 14L, and chain cutter 15L are arranged on the left side of the frame post 11, and the housing of the drive motor 13L connected to the drive sprocket 12L is arranged so as to protrude to the right side of the frame post 11. It is
The right drive sprocket 12R, driven sprocket 14R, and chain cutter 15R are arranged on the right side of the frame post 11, and the casing of the drive motor 13R connected to the drive sprocket 12R is arranged so as to project to the left side of the frame post 11. It is
The left and right driven sprockets 14L, 14R are arranged at the same symmetrical position on the lower end of the frame post 11, and the lower ends of the left and right chain cutters 15L, 15R are aligned at the same height.
The left chain cutter 15L is longer than the right chain cutter 15R, and the left drive sprocket 12L and drive motor 13L are arranged above the right drive sprocket 12R and drive motor 13R.

As shown in FIG. 3, a guide 21 is arranged behind the left and right chain cutters 15L and 15R. The guide 21 is connected via a member passed between the two chain cutters 15L and 15R. The member passed between the two chain cutters 15L and 15R may be part of the frame post 11, part of the guide 21, or other parts. If there are a plurality of chain cutters, it is possible to form a structure in which a member is passed between two adjacent chain cutters, so the number of chain cutters is not limited to two. For example, a member may be passed between each of two locations of three chain cutters arranged in parallel.

Furthermore, a housing case 22 is arranged on the rear side of the guide 21 , and the excavating section 10 and the housing case 22 are connected via the guide 21 . Therefore, the relative position of the excavating section 10 and the housing case 22 in the installation direction can be changed by the guide 21 . The endless chain 15a is arranged linearly in the installation section of the chain cutters 15L and 15R between the two sprockets (12L and 14L or 12R and 14R), and this direction is called the installation direction (same below).

As shown in FIG. 3, the jacks 20 are arranged adjacent to the outer circumferences of the chain cutters 15L and 15R, and the expansion/contraction direction of the jacks 20 is arranged along the direction away from the outer circumferences.
Here, the outer peripheral portions of the chain cutters 15L and 15R refer to the outer peripheral portion of the endless chain 15a. The outer peripheral portion of the endless chain 15a is a portion outside the loop of the endless chain 15a wound around the driving sprocket 12 and the driven sprocket 14 in a loop. "Adjacent to the outer periphery of the chain cutters 15L and 15R" means to exist outside the loop of the endless chain 15a and in the normal direction of the loop of the endless chain 15a. At that time, the "direction away from the outer peripheral portion" is a direction (including a normal direction) crossing the tangential direction of the loop of the endless chain 15a.
Also, the jack 20 is provided adjacent to the construction section of the chain cutters 15L and 15R between the two sprockets (12L and 14L or 12R and 14R). That is, it is provided adjacent to the construction section of the chain cutters 15L and 15R, which is a straight section and is sufficiently long with respect to the sprockets (12, 14), rather than the section hung thereon. Although there are two construction sections (straight sections), the jack 20 is provided adjacent to only one of them, and excavation is performed in the opposite section.
Furthermore, a plurality of jacks 20 are provided side by side along the installation direction of the chain cutters 15L and 15R (six jacks are provided in the figure). A plurality of jacks 20 are fixed to a common housing case 22 at their ends facing the chain. Although a plurality of jacks 20 are applied in this embodiment, a single jack 20 may be applied. In this case, the position in the vertical direction where the jack 20 is installed should be appropriately selected in consideration of the resistance during excavation. Since the resistance during excavation increases as the depth increases, it is preferable to install the jack 20 in the single case in the middle in the vertical direction or slightly below the middle.
As shown in FIG. 1, the housing case 22 is formed elongated in the installation direction and holds a plurality of jacks 20 at predetermined intervals in the installation direction. It is within the excavation width of 15R.
In the figure, the plurality of jacks 20 are shown at equal intervals, but the deeper the depth, the greater the resistance during excavation. good too.

The jack 20 is connected to the excavation section 10 as described above.
The extension and contraction direction of the jack 20 is preferably substantially perpendicular to the erection direction, but may be provided with an inclination angle according to the convenience of excavation, mechanical restrictions, and the like.

Cover plates 23L and 23R extend from both sides of the housing case 22 in the direction opposite to the excavation section 10 side. The length of the cover plates 23L and 23R in the vertical direction is made long enough to extend from the upper end opening of the excavation hole H provided in the ground G to the bottom surface as shown in FIG. The rearward extension length of the cover plates 23L, 23R preferably reaches rearward beyond the extended position of the ends of the jack 20 opposite to the chain cutters 15L, 15R as shown in FIG. . This is for closing the space between the concrete pile P and the housing case 22 .
Jacks and similar mechanical devices can be applied as propulsion drives. In this embodiment, a hydraulic cylinder type is shown, but the propulsion drive is arranged adjacent to the outer circumference of the chain cutters 15L and 15R, and the opposite end E (see FIG. 3) to the outer circumference is separated from the outer circumference. It suffices that along the direction, an operation of pushing away from the outer peripheral portion and an operation of retracting toward the outer peripheral portion can be driven. Therefore, in addition to the hydraulic cylinder type, the propulsion drive unit can be a pneumatic type (air jack, see FIGS. 11 and 12), a feed screw type, or a combination of a linear motion mechanism and a link mechanism (see FIGS. 13 and 14). ), a combination of a linear motion mechanism and a wedge mechanism (see FIGS. 15 and 16), and various other mechanical devices can be applied.
A tunneling machine 1B shown in FIGS. 11 and 12 has an air jack 41 as a propulsion drive unit, and has the same configuration as the tunneling machine 1 except for the other parts. An excavating apparatus 1C shown in FIGS. 13 and 14 has a combination mechanism of a linear motion mechanism 51 and a link mechanism 52 as a propulsion driving section, and has the same configuration as the excavating apparatus 1 except for the other parts. A tunneling machine 1D shown in FIGS. 15 and 16 has a combination mechanism of a linear motion mechanism 61 and a wedge mechanism 62 as a propulsion drive unit, and has the same configuration as the tunneling machine 1 except for the other parts. The wedge mechanism 62 is a complementary mating of two wedge slopes. Note that the illustrated mechanical configuration is merely an example and may be changed as appropriate.

[Example of structure embedding method]
Next, a structure burying method using the excavating apparatus 1 will be described with reference to FIGS. 1, 3, and 4 to 7. FIG.
The following example is a structure burying method in which a structure is continuously buried in the hole H while extending the hole H provided in the ground G in the lateral direction (rightward in FIG. 1) by the excavator 1. , the structure is a continuous wall made up of a plurality of concrete piles P.

An excavator 1 is installed in a hole H. The hole H may be a hole drilled by the drilling unit 10 or may be a hole drilled by other means. When the construction work is started from a state in which no hole H exists, it is sufficient to excavate the ground G by the excavating unit 10 to form the hole H.
After the excavating device 1 is installed in the hole H, an excavating process for extending the hole H in the lateral direction is started.
In the excavation step, the chain cutters 15L and 15R are started, and the extension side inner wall portion Hf of the hole H is excavated by the excavating portion 10, and the jack 20 is extended (extending the opposite end portion E). The excavated portion 10 is moved to the extension side of the hole H by pressing the opposite side inner wall portion to the extension side inner wall portion Hf directly or via the object (P). By extending all the jacks 20 at the same rate at the same time, the excavation section 10 can be advanced without changing the angle. It is possible to finely adjust the amount by which the excavated portion 10 is pushed into the extension side inner wall portion Hf by extending the jack 20 . By tilting the extension rate of the jack 20 in the vertical direction, the angle of the excavating section 10 can be changed. can continue. In addition, since the vertical position of the excavating section 10 can be changed along the guide 21, it is possible to excavate from a deep position or from a shallow position according to the ground conditions.
As the main excavation process progresses, the situation shown in FIGS. 1 and 3 changes to the situation shown in FIGS.

When the situation shown in FIGS. 4 and 5 is reached, the space opening process is performed.
In the space opening step, as shown in FIG. 6, the jack 20 is retracted (the reverse end E is pulled in), and the opposite inner wall portion or object (P) pressed by the jack 20 in the excavation step is separated from the jack 20. A space R is provided between the opposite end E of . In the figure, since the jack 20 presses the leading concrete pile P in the excavation process, a space R is provided between the concrete pile P and this pile P. In the excavation process before inserting the first concrete pile P, the opposite side inner wall is pressed, and in the next space opening process, a space R is provided between the opposite side inner wall. . In addition, while the hole H is not enlarged enough to arrange the cover plates 23L and 23R in the hole H, the cover plates 23L and 23R are pushed into the ground. Alternatively, the cover plates 23L and 23R are removed from the housing case 22, and the cover plates 23L and 23R are attached to the housing case 22 and arranged in the hole H after a gap is created in the hole H where they can be arranged.

Next, an embedding process is performed.
As shown in FIGS. 6 and 7, in the burying step, a concrete pile P, which is a component of the structure, is inserted into the space R. As shown in FIGS. This concrete pile P will be pushed by the jack 20 in the next excavation process.

By repeating the excavating process, the space-opening process, and the burying process several times in this order, the structure is continuously buried in the hole H while extending the hole H in the horizontal direction.

Since the cover plates 23L and 23R block the space between the concrete pile P and the housing case 22 throughout the above processes, earth and sand are prevented from falling into the hole H.

[Other examples of structure embedding method]
In the structure embedding method described above, concrete piles P were inserted into the space R opened in the space opening process. In other words, a component placed in the space R in the structure at the time of completion is inserted. It may be a part of or a semi-finished product as long as it can withstand the pressing force of the jack 20 .
For example, the structure can be a concrete wall and the component inserted into the space R can be concrete.
In this case, as shown in FIGS. 8 and 9, a long pressing partition plate 24 connecting the tips of the jacks 20 and extending from the lower end to the upper end of the concrete wall CW is applied to the excavator 1 . In the embedding step, the concrete C in the state of ready-mixed concrete is poured from a mixer truck into the space (R) and embedded. At this time, since the pressing partition plate 24 closes the extension side of the hole H, the front surface (extending side) of the concrete C can be formed by the pressing partition plate 24 . Also, the pressing partition plate 24 prevents the concrete C from flowing out to the cylinder side of the jack 20 .
The vertical lengths of the cover plates 23L, 23R and the pressing partition plate 24 are preferably equal to or greater than the length from the lower end to the upper end of the concrete wall CW. As a result, three surfaces of the concrete C, ie, both side surfaces and the front surface, can be formed. The rear surface of the concrete C is shaped by the front surface of the concrete C that has already solidified. With regard to the rear surface (the end surface on the side opposite to the extension side) and the side surface of the ground portion of the concrete wall CW, a mold plate is appropriately applied (extending the formwork of the ground portion) to form the concrete C (concrete wall CW (unnecessary if there is no above ground part).
In the excavation step after burying the concrete C, the concrete C is pressed by the jack 20 to move the excavated portion 10 to the extension side of the hole H, and the concrete C is dehydrated and compacted. That is, the concrete C embedded in the space (R) functions as the resistor, and the concrete C is dehydrated and compacted by being pressed to strengthen it.
Depending on the softness of the concrete C, the upper surface of the concrete C may be covered with a lid to move the excavation 10 to the extension side of the hole H and increase the pressing force for dewatering and consolidating the concrete.
In addition to the above molding and consolidation and dehydration strengthening, solidification of the concrete C is progressed over time including the excavation process time, and after the concrete C does not collapse even if the pressing partition plate 24 is separated from the concrete C, A space opening step is performed to provide a space (R) between the concrete C and the pressing partition plate 24, and the next embedding step is performed. Excessive waiting time can be eliminated by adjusting the mix of ready-mixed concrete and the supply timing so that the space opening process can be started at the end of the excavation process.
When the concrete wall CW has an above-ground part, the formwork for the above-ground part is extended as the excavator 1 advances, and when the concrete C becomes sufficiently strong, the formwork for the above-ground part is removed to complete the construction.

[Combined use of pile press-in machine]
A structure burying construction method using a pile press-in machine in addition to the excavation apparatus 1 explained above will be explained.
A pile press-in machine 3 is used to support the excavator 1 as shown in FIG.
The pile press-in machine 3 includes a saddle 30, a clamp 31 provided at the bottom of the saddle 30 to grip the upper end of the existing pile P, a slide base 32 that moves back and forth with respect to the saddle 30, and a slide base 32 that can turn. A mast 33 provided, a chuck portion (chuck frame 34, a pile gripping chuck 35) provided to be able to move up and down with respect to the mast 33, and an excavation that is connected to the pile gripping chuck 35 and protrudes forward to grip the excavation device 1. and a partial gripping chuck 36 .
A member of the guide 21 on the excavation section 10 side is gripped by the excavation section gripping chuck 36 . As shown in FIG. 10, the excavating section 10 is configured to be longer than the housing case 22 of the jack 20, and the excavating section gripping chuck 36 excavates the guide 21 at the portion of the excavating section 10 disposed above the housing case 22. The member on the part 10 side is held.

Since the pile press-in machine 3 grips and supports the excavation section 10 with the excavation section gripping chuck 36 as described above, the vertical position of the excavation section 10 can be held. It is possible to prevent the excavation unit 10 from moving up and down due to excavation resistance during excavation of the ground by the excavation unit 10 in the excavation step. In addition, when it is desired to intentionally change the vertical position of the excavation section 10, the chuck frame 34 is moved up and down with respect to the mast 33, so that not only the pile gripping chuck 35 but also the excavation section gripping chuck 36 are moved up and down. Thereby, it is also possible to change the vertical position of the excavation section 10 .

In the above excavation step, when the jack 20 is extended to move the excavation section 10 forward, the slide base 32 moves forward so that the excavation section gripping chuck 36 follows the forward movement of the excavation section 10. can be done. Further, by power-moving the slide base 32 forward in accordance with the extension operation of the jack 20, the forward force of the excavating section 10 can be assisted. If a pile press-in machine is used together, even if the jack 20 is single, the attitude control (angle adjustment) of the excavation section 10 is possible. Moreover, even if the jack 20 is used as a single unit without using a pile press-in machine, the excavation section 10 can be kept in a fixed posture by selecting the installation position of the jack 20 in the vertical direction as described above.

The chuck frame 34 is a penetrating structure for vertically inserting the pile, and the pile gripping chuck 35 is a mechanism for gripping the inserted pile by a cylinder that advances and retreats. Also, the excavation part gripping chuck 36 is arranged at a position where it does not interfere with the pile inserted through the chuck frame 34 .
Therefore, when inserting the concrete pile P into the space R in the embedding process, the concrete pile P is first inserted through the chuck frame 34 so that it can be sent into the space R below. The process can be executed smoothly without removing or moving the machine.

In order to hold the vertical position of the excavating section 10, the portion where the excavating apparatus 1 is connected to the chuck section (the chuck frame 34, the pile gripping chuck 35) is located on the side of the excavating section 10 of the guide 21 as described above. It is not limited to the case of using it as a member. If the guide 21 is made lockable, the chuck portion may be connected to the housing case 22 or may be connected at another portion.
Alternatively, the excavator 1 may be connected to the chuck frame 34 without the pile gripping chuck 35 interposed therebetween.
In the space opening process and the burying process, the gripping by the excavation part gripping chuck 36 may be released to disconnect the pile press-in machine 3 and the excavation apparatus 1 .

Also, in the burying process, the concrete pile P is gripped by the pile gripping chuck 35 before the upper end of the concrete pile P is completely pulled out of the pile gripping chuck 35, and the portion inserted into the space R of the concrete pile P by extending the jack 20 is firmly fixed, the grip of the clamp 31 is released, the clamp 31 is raised together with the mast 33 and the saddle 30, moved forward with the saddle 30 by one pile pitch, lowered together with the mast 33 and the saddle 30, and the clamp 31 By gripping the upper end of the existing concrete pile P by the , the pile press-in machine 3 can be moved forward. Therefore, the pile press-in machine 3 can also move forward following the forward movement of the excavator 1, and the extension of the hole by excavation and the embedding of the concrete pile P can be executed continuously and smoothly.

According to the embodiment described above, the excavation apparatus 1 has the function of advancing the excavation section 10 by itself by expanding and contracting the jack 20 connected to the excavation section 10. The lateral reaction force is obtained by pressing the side surface of the hole H, and the structure (P, P, ) can be continuously buried. Therefore, without pulling out the excavator 1 from the hole H, the construction method can be efficiently and smoothly continued while improving the degree of freedom in the construction of the buried structure (P).
In other words, it is possible to continuously perform pre-drilling of the excavation hole and embedding of the pile material, which is efficient. Since the ground is used as a reaction force to extend the jack 20 horizontally, there is no need to bury the existing piles in the excavation hole in advance to obtain the reaction force, and construction can be performed from the state where the pile material is not buried in the excavation hole. be able to.
According to the construction method using both the excavating device 1 and the pile press-in machine 3 described above, there are the following advantages over the conventional construction method using both the auger device and the pile press-in machine.
Since the excavation part 10 of the chain cutter type can excavate the part that cannot be excavated by the middle excavation corresponding to the inner width of the pile by the auger device, it is possible to excavate sufficiently for the pile width, and the pile material can be easily buried.
In the construction method using a conventional auger device and a pile press-in machine together, it is necessary to hang the auger in the hollow part of the pile material and pull it out for each pile material. If it is installed on the ground, it will excavate continuously without pulling it up to the ground, so even if it is equivalent to excavating one pile material, the work process will be small and efficient. be.
In addition, according to the method of using both the excavator 1 and the pile press-in machine 3 described above, compared to the case of using only a conventional chain cutter type excavator without a propulsion drive unit, the following advantages There is
Since the pile press-in machine 3 supports and assists when the position of the excavation device 1 is moved back and forth and up and down, the operation is stable and the work is safe.
A single pile press-in machine 3 can handle from the excavation of the ground by the excavator 1 to the work of burying the pile material in the excavation hole.
In the above-described embodiment in which the buried structure is formed by continuous piles, concrete piles are used as piles to be buried in excavated holes, but other types of piles such as steel pipe piles may be applied.

1 Excavation Equipment 3 Pile Press-in Machine 10 Excavation Unit 11 Frame Post 12L Drive Sprocket 12R Drive Sprocket 13L Drive Motor 13R Drive Motor 14L Driven Sprocket 14R Driven Sprocket 15L Chain Cutter 15R Chain Cutter 15a Endless Chain 15b Cutter Bit 20 Jack 21 Guide 22 Housing Case 23L Cover plate 23R Cover plate G Ground H Excavation hole Hf Extension side inner wall P Concrete pile R Space

Claims (5)

A chain cutter type excavation section that circulates and drives a chain cutter having a cutter for scraping the ground on the outer circumference, and a propulsion drive section connected to the excavation section, and the propulsion drive section is adjacent to the outer circumference. An operation of pushing the opposite end of the propulsion drive unit to the end on the side of the outer circumference away from the outer circumference along the direction away from the outer circumference and an action of pulling it closer to the outer circumference. A structure burying method for continuously burying a structure in a hole provided in the ground while laterally extending the hole provided in the ground by the excavating device,
While excavating the inner wall portion on the extension side of the hole by the excavating portion, the opposite end portion of the propulsion drive portion is pushed out, and the inner wall portion on the opposite side to the inner wall portion on the extension side is pushed out by the propulsion drive portion directly or via an object. an excavation step of moving the excavation portion to the extension side of the hole by pressing with the
a space opening step of drawing in the opposite end portion of the propulsion drive portion to provide a space between the opposite inner wall portion or object pressed by the propulsion drive portion in the excavation step and the opposite end portion;
an burying step of burying the constituent elements of the structure in the space to form the object;
By repeating the excavation step, the space-opening step, and the embedding step multiple times in this order, the structure is continuously embedded in the hole while extending the hole in the lateral direction;
The structure is a continuous wall made of a plurality of piles, the constituent elements are piles,
Using a pile press-in machine that can connect the excavation device to a chuck part that grips the pile material and moves up and down,
The pile press-in machine includes a clamp that grips the upper end of the existing pile material, and the chuck part is movable back and forth with respect to the clamp,
In the excavation step, a structure burying construction method in which the excavation device is connected to the chuck portion and the vertical position of the excavation portion is held by the pile press-in machine. 2. The structure burying method according to claim 1, wherein the excavation device includes the single propulsion drive unit. 3. The structure burying method according to claim 2, wherein the propulsion drive unit is arranged below the center of the excavator in the vertical direction. 2. The structure burying method according to claim 1, wherein the excavation device includes a plurality of the propulsion drive units. 5. The method of burying a structure according to claim 4, wherein the excavating apparatus is provided with the propulsion drive units at a plurality of positions including at least below the center in the vertical direction of the excavating apparatus.

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