Construction method and rail carrier

Abstract

To improve the workability of a construction method and to reduce a load on the environment such as cutting of standing trees in the construction method for excavating a slope and installing a structure in a hole formed by the excavation.SOLUTION: In a construction method using a rail-transporting carriage including a carriage that travels on a rail laid on a slope, an excavating member that is provided on the carriage and excavates the slope, and a crane that is provided on the carriage and hoists a structure, the excavating member excavates the slope from the carriage in a state where the carriage is placed on the rail, and the structure is installed in a hole excavated by the excavating member in a state where the carriage is placed on the rail.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a construction method using a rail transport vehicle and the rail transport vehicle. [Background technology]

[0002] A construction method has been proposed in which a slope where vehicles traveling on roads and heavy machinery traveling on rough ground cannot enter is excavated and a structure such as a rockfall protection fence is constructed in the hole formed by the excavation. In this type of construction method, a rail is laid on the slope and a rail transport vehicle traveling on the rail is used to transport materials, equipment, workers, etc. to the construction site where the excavation is to be performed. After that, the workers assemble a flat work platform that covers the entire construction site, and excavation is performed from the top of the work platform using an excavator such as a down-the-hole hammer, and a support pillar is installed in the hole using equipment such as a crane that hoists and transports structures such as supports.

[0003] Here, in order to assemble a flat work platform that covers the entire construction site, a large amount of workers, materials, time, and costs were required, which increased the workload. Furthermore, since the above-mentioned sloping land is often covered with standing trees, when assembling the work platform, it was necessary to cut down new standing trees, which increased the burden on the environment. In other words, when assembling the work platform, an increase in the workload and the burden on the environment occurred. Furthermore, in order to transport the excavator or crane to the top of the work platform, it was necessary to disassemble the excavator or crane and then transport it on a rail transport vehicle, which also increased the workload.

[0004] Thus, as shown in Patent Document 1, there is a construction method in which an excavator is mounted on a rail transport vehicle to excavate from the rails. In this type of construction method, an excavator, materials, and workers are loaded onto the rail transport vehicle that runs on the rails, and the rail transport vehicle runs on a single rail to the construction site. When the rail transport vehicle arrives at the construction site, the rail transport vehicle is set up on two rails, a second rail erected next to the single rail and the single rail that was running, and an excavator is operated from above the two rails to excavate.

[0005] However, in the above construction method using a rail-operated vehicle, the rail-operated vehicle can only excavate, and when installing supports in the excavated holes, a separate crane must be transported. As a result, the required manpower, materials, time, and costs increase, and workability deteriorates. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2012-052338 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made to solve the above problems, and has as its main objective to improve the workability of a construction method in which excavation is performed on sloping ground and a structure is installed in the hole formed by the excavation, while reducing the burden on the environment, such as the felling of standing trees. [Means for solving the problem]

[0008] In other words, the construction method using a rail transport vehicle of the present invention is a construction method using a rail transport vehicle that is equipped with a cart that runs on a rail laid on a sloping ground, excavation members that are mounted on the cart and excavate the sloping ground, and a crane that is mounted on the cart and hoist a structure, and is characterized in that, with the cart placed on the rail, the excavation members excavate the sloping ground from the cart, and, with the cart placed on the rail, the structure is installed in the hole excavated by the excavation members. The rail transport vehicle according to the present invention is characterized by comprising a carriage that runs on a rail laid on a slope, an excavation member that is provided on the carriage and excavates the slope, and a crane that is provided on the carriage and hoists a structure. Alternatively, the rail transport vehicle according to the present invention is characterized by comprising a carriage that runs on a rail laid on a slope, an excavation member attachment portion that is provided on the carriage and to which an excavation member that excavates the slope is attached, and a crane that is provided on the carriage and hoists a structure.

[0009] In this way, the cart is placed on the rails laid on the slope, and the excavation member is used to excavate the slope from the cart, so the rails on which the cart runs are also used for excavation or for installing structures. Therefore, there is no need to build a new work platform to excavate the slope, as in the past, and no construction work is required to install a crane, so the workability of the construction method of excavating the slope and installing a structure can be improved. In addition, there is no need to cut down trees except in places where the rails are laid, so the burden on the environment can be reduced compared to the case of building a work platform and installing a separate crane.

[0010] The rail transport vehicle further includes a boom that is extendable and rotatable on the cart and can be raised and lowered between a raised and lowered position, and the excavation member is mounted on the cart via the boom, and the construction method desirably includes manipulating the extension and extension state of the boom, the swiveling state of the boom, or the raising and lowering state of the boom to land the excavation member on the slope, and then lowering or extending the boom so that the excavation member excavates the slope. With this method, the boom is rotated to adjust the position of the excavation member, and then the boom is operated to land the excavation member on the slope before excavation, so excavation can be performed within a range that the boom can reach and that does not cause an obstacle to the rail transport vehicle or the rail. Therefore, the location where the rail is laid can be selected relative to the construction site where the structure is to be installed, so the rail can be laid avoiding areas where trees are growing, compared to when a work platform is installed. As a result, only trees that are obstacles at the construction site and the location where the rail is laid need to be cut down, so the amount of tree cutting can be reduced, and the burden on the environment can be reduced, compared to when a work platform is installed.

[0011] The rail transport vehicle further includes a hook attached to the boom and capable of being raised and lowered relative to the boom, and the excavation member and the hook are provided at the tip of the boom, and the construction method includes attaching a transported object to the hook when the rail transport vehicle is placed on the rail, operating the boom to raise the hook and hoist the structure, and installing the structure in a hole excavated by the excavation member. In this method, the excavation member and the hook are mounted on the same boom, so that the two tasks of excavation and installation of structures can be performed within the working radius of the same boom, compared to a configuration in which the excavation member and the hook are mounted on separate booms. Therefore, when considering the construction procedure, the two tasks of excavation and installation of structures can be performed without moving the rail transport vehicle by simply considering the working capacity range of the heavier state, improving the convenience of the work. In addition, the same working mechanism can be used to operate the excavation member and the hook, simplifying the working mechanism or work procedure. Here, the excavation member is connected to the boom on the transported platform and assembled. Since both the excavation member and the hook are provided at the tip of the boom, when the excavation member that has been transported sideways is lifted up and erected by the hook, the excavation member can be erected near the position where it is attached to the boom, and the installation work can be performed safely and easily. Similarly, since both the excavation member and the hook are provided at the tip of the boom, when removing the excavation member from the boom, the travel distance required to remove the excavation member from the boom and attach it to the hook can be shortened. As a result, high safety is achieved and workability is excellent.

[0012] The rail transport vehicle further comprises a pair of main outriggers arranged on both sides of the rail and interposed between the slope and the trolley to support the trolley, and auxiliary outriggers arranged at least in front or behind the main outriggers and interposed between the slope and the trolley to support the trolley, and the excavation method includes a method in which the trolley is placed on the rail, the main outriggers or the auxiliary outriggers are landed on the slope, and the excavation member excavates the slope from the trolley, and the structure is installed in the hole excavated by the excavation member. With this method, at least one auxiliary outrigger is provided in addition to the main outrigger, and the slope is excavated with the main outrigger or the auxiliary outrigger landed on the slope, so that the cart can be placed stably on the rails on the slope, improving work safety. In particular, in recent years, with the improvement of the capabilities of structures such as rockfall protection fences, there is an increasing need to use larger materials and equipment during construction to install large structures on sloping ground, and since construction is carried out with the main outriggers or auxiliary outriggers landed on the sloping ground and supporting the dolly, large materials and equipment can be loaded onto the dolly. Therefore, since there is no need to build a large-scale work platform as in the past, it is possible to reduce manpower, materials, time, and costs, and since the scale of construction is smaller, it is possible to reduce the burden on the environment, such as cutting down standing trees.

[0013] The construction method includes, when the trolley is placed on the rails and the main outrigger or the auxiliary outrigger is landed on the inclined ground, if the trolley tilts to the left or right, extending the main outrigger or the auxiliary outrigger on the lowered side to return the trolley to a horizontal position in the left or right direction. With this configuration, even if the main outrigger or auxiliary outrigger sinks into the ground during construction, for example because the ground strength of the sloping land is insufficient, the trolley can be returned to a horizontal position in the left-right direction. Therefore, even on sloping land with insufficient ground strength, construction can be carried out with the trolley stably placed on the rails, thereby improving work safety. Effect of the Invention

[0014] According to the present invention configured in this manner, in a construction method in which excavation is performed on an inclined ground and a structure is installed in the hole formed by the excavation, the workability of the construction method can be improved and the burden on the environment, such as the felling of standing trees, can be reduced. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic diagram of a rail transport vehicle according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic diagram showing a rail transport vehicle moved onto a slope in the embodiment. [Diagram 3] FIG. 2 is a schematic diagram showing the rail transport vehicle as viewed from the boom's rotation axis direction in the embodiment. [Figure 4] 10 is a schematic diagram showing an excavation method in which a rail transport vehicle moved to a slope excavates the slope in the embodiment. FIG. [Diagram 5] FIG. 13 is a schematic diagram showing a state in which the rail transport vehicle is moved onto a slope and hoists an object to be transported in the embodiment. [Figure 6] FIG. 11 is a schematic diagram showing a state in which a rail transport vehicle moved to a slope excavates the slope in another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An embodiment of the excavation method and the rail transport vehicle according to the present invention will be described below with reference to the drawings. Note that in any of the drawings shown below, some parts may be omitted or exaggerated in schematic form for ease of understanding. The same components are given the same reference numerals and the description thereof will be omitted as appropriate.

[0017] <Basic configuration of rail transport vehicle> The rail transport vehicle 100 of this embodiment is installed on a sloping ground such as a forest to transport structures such as pillars or personnel. Specifically, as shown in Figs. 1 and 2, the rail transport vehicle 100 includes a carriage 10 that travels on a rail R laid on a sloping ground, a crane 20 provided on the carriage 10, a travel drive source 30 that travels the carriage 10, a tilting support mechanism 40 that tilts and supports the crane 20, main outriggers 50 provided on both sides of the rail R, auxiliary outriggers 60 provided separately from the main outriggers 50, a tilting mechanism 70 that tilts the auxiliary outriggers 60, and an excavation member 80 that excavates the sloping ground. Note that, although the number of rails R is three in this embodiment, the number of rails R is not limited to this.

[0018] Each part will be described in detail. In the following, the direction in which the rail transport vehicle 100 climbs a slope is referred to as the up direction, the direction in which it descends is referred to as the down direction, and the direction perpendicular to the up-down direction (the width direction of the rail R) is referred to as the left-right direction. Also, the direction in which the rail transport vehicle 100 climbs a slope is referred to as the forward traveling direction of the rail transport vehicle 100, and the direction in which the rail transport vehicle 100 descends a slope is referred to as the rear traveling direction of the rail transport vehicle 100.

[0019] The cart 10 includes a cart body 11 on which an operator of the rail transport vehicle 100 gets on, and wheels 12 that are provided on the underside of the cart body 11 and roll on the rail R. In this embodiment, the rail transport vehicle 100 may be operated by an operator from a driver's seat provided on the cart 10, or may be operated by a wired or wireless remote control so that the operator can operate the cart 10 away from the cart 10.

[0020] The crane 20 is used to hoist and carry objects (luggage) such as, for example, pillars, and has a base 21 provided on the cart body 11, a rotatable and raiseable boom 22 provided on the base 21, and a hook 23 provided on the boom 22. The crane 20 is provided with various crane operation units 24 with which an operator operates the crane 20, such as a rotation lever for rotating the boom 22, an erection lever for raising the boom 22, and a lifting lever for raising and lowering the hook 23. In this embodiment, the crane operation unit 24 may be remotely controlled by a wired or wireless remote control.

[0021] The boom 22 is rotatably supported on the base 21 and has a rotating support 221 that forms the rotation axis of the boom 22, and a columnar telescopic member 222 that is rotatably connected to the rotating support 221 and can extend and retract in the longitudinal direction. The telescopic member 222 is configured to be rotatable in the vertical direction relative to the rotating support 221, and the boom 22 is configured to be able to rise and fall between a raised state and a reclined state.

[0022] The hook 23 is provided on the boom 22 so as to be capable of ascending and descending via, for example, a retractable wire rope, and in this embodiment, is attached to the tip of the expandable member 222.

[0023] The traveling drive source 30 is a power unit such as a gasoline or diesel engine or an electric motor, and is a hydraulic system that circulates hydraulic oil. In this embodiment, various operations of the rail transport vehicle 100 use hydraulic pressure, and the traveling drive source 30 is a power source that integrates a hydraulic system such as a hydraulic pump and a hydraulic oil tank for circulating the hydraulic oil required for each operation. This traveling drive source 30 is provided on the carriage body 11 together with the crane 20 described above. That is, the traveling drive source 30 of this embodiment moves up and down a slope together with the crane 20. The traveling drive source 30 may be provided on the carriage body 11 either in front of or behind the crane 20, and may be provided on the side that is less likely to interfere with work such as the movement of structures using the crane 20 according to the situation at the construction site, but may be fixed in front of the crane 20.

[0024] The tilting support mechanism 40 is interposed between the cart 10 and the crane 20, and tilts the crane 20 toward the traveling direction of the cart 10. Specifically, the tilting support mechanism 40 includes an axis member 41 that rotatably supports the lower part of the crane 20, and a lift unit 42 that lifts the lower part of the crane 20. The lift unit 42 lifts the lower part of the crane 20, so that the entire crane 20 rotates around the axis member 41 and tilts in the traveling direction of the cart 10, thereby holding the crane 20 horizontally. In this embodiment, the tilting support mechanism 40 can hold the crane 20 horizontally even on a slope of 45 degrees, which is the traveling climbing limit. The lift unit 42 here utilizes a cylinder operated by a hydraulic pump (not shown).

[0025] The main outriggers 50 are disposed between the sloping ground and the carriage 10 to support the carriage 10. In this embodiment, when the crane 20 is tilted forward by the tilting support mechanism 40 described above, the main outriggers 50 tilt in conjunction with this.

[0026] More specifically, the main outriggers 50 are columnar and provided on both the left and right sides of the crane 20, and in this embodiment, are attached integrally to the crane 20. As a result, the pair of main outriggers 50 tilt in the traveling direction of the carriage 10 in conjunction with the tilt of the crane 20 by the tilting support mechanism 40. Note that the main outriggers 50 do not necessarily need to be linked to the crane 20, and may tilt independently of the crane 20.

[0027] These main outriggers 50 are configured to be rotatable and extendable. More specifically, the main outriggers 50 have, for example, a columnar outer shell portion 51 and a columnar extension portion 52 housed inside the outer shell portion 51 and extending from the outer shell portion 51 to a slope. The main outriggers 50 in this embodiment are configured to be extendable in the left-right direction away from the crane 20. The extension operation of the main outriggers 50 to a slope or the extension operation in the left-right direction is performed by a cylinder using the above-mentioned hydraulic pump, and in this embodiment, the pair of main outriggers 50 are configured to be controllable independently of each other. The extension operation or the extension operation in the left-right direction of the main outriggers 50 is operated by a wired or wireless remote control.

[0028] The auxiliary outriggers 60 are disposed at least in front of or behind the main outriggers 50, and are interposed between the slope and the cart 10 to support the cart 10. Here, the auxiliary outriggers 60 are columnar and provided at multiple locations around the crane 20, and more specifically, are provided on both the left and right sides in front of the main outriggers 50 and on both the left and right sides behind the main outriggers 50.

[0029] These auxiliary outriggers 60 are configured to be rotatable and extendable. More specifically, the auxiliary outriggers 60 have, for example, a columnar outer shell portion 61 and a columnar extension portion 62 housed inside the outer shell portion 61 and extending from the outer shell to the slope. The extension operation of the auxiliary outriggers 60 onto the slope is performed by a cylinder utilizing the above-mentioned hydraulic pump, and in this embodiment, the multiple auxiliary outriggers 60 are configured to be controllable independently of each other. The auxiliary outriggers 60 may be configured to be extendable in a direction away from the crane 20 in the left-right direction or the front-rear direction.

[0030] The tilting mechanism 70 tilts the auxiliary outriggers 60 of this embodiment with respect to the traveling direction of the carriage 10. The tilting mechanism 70 is provided for each of the multiple auxiliary outriggers 60, and allows the multiple auxiliary outriggers 60 to rotate independently of each other.

[0031] More specifically, the tilting mechanism 70 includes a shaft member 71 that rotatably supports the lower part of the auxiliary outrigger 60, and a tilting unit 72 that tilts the part above the shaft member 71 in the traveling direction of the cart 10. The tilting unit 72 tilts the part above the lower part of the auxiliary outrigger 60, causing the auxiliary outrigger 60 to rotate around the shaft member 71 and tilt in the traveling direction of the cart 10. The tilting unit 72 here utilizes a cylinder operated by the above-mentioned hydraulic pump.

[0032] The excavation member 80 excavates a sloping ground from the cart 10 while the cart 10 is placed on the rail R. In this embodiment, the excavation member 80 is a so-called down-the-hole hammer. Specifically, the excavation member 80 includes an excavation member attachment part 81 provided on the boom 22, a transmission mechanism 82 for transmitting a rotational force or compressed air, and an excavation member main body 83 for excavating a sloping ground by rotation and impact.

[0033] The excavation member mounting part 81 is provided at the tip of the boom 22, more specifically, at the tip of the telescopic member 222 adjacent to the hook 23. By providing the excavation member mounting part 81 at the tip of the telescopic member 222, the excavation member 80 is provided to the cart 10 via the boom 22. Note that the position at which the excavation member mounting part 81 is provided is not limited to the tip of the telescopic member 222, and may be any position on the boom 22.

[0034] The transmission mechanism 82 transmits a rotational force to the excavation member body 83 to rotate the excavation member body 83. Specifically, the transmission mechanism 82 has, for example, a motor (not shown), and the motor transmits the rotational force to the excavation member body 83 by its rotation, and supplies compressed air to the excavation member body 83. The compressed air is produced using a well-known compressor, and this compressor may be provided in the rail transport vehicle 100 or may be provided separately from the rail transport vehicle 100. In this embodiment, the motor of the transmission mechanism 82 is a hydraulic motor, and is powered by a hydraulic pump of the traveling drive source 30.

[0035] The excavation member body 83 is attached to the excavation member attachment part 81 via the transmission mechanism 82 and has a columnar shape. Specifically, the excavation member body 83 is, for example, a hammer part, and creates a hole H in the sloping ground by rotation and impact. Specifically, the excavation member body 83 incorporates a piston (not shown) that reciprocates up and down by the supplied compressed air to strike the ground. While the excavation member body 83 rotates by the transmitted rotational force, the tip of the excavation member body 83 reciprocates up and down by the supplied compressed air, striking the sloping ground and excavating it. Then, the compressed air is sprayed from the tip of the excavation member body 83, and the excavated soil and sand are discharged from the hole H to the ground.

[0036] <Construction method using a rail transport vehicle> Next, a construction method using the above-mentioned rail transport vehicle 100 will be described with reference to Figures 2 to 5. In this embodiment, the excavation method is, for example, a construction method for constructing a rockfall protection fence on a slope, but is not limited to this. In the construction method described below, various devices can be remotely operated using a wired or wireless remote control, so that even if the construction site is close to the rail transport vehicle 100, various operations can be performed in a place where they will not be exposed to discharged soil and sand.

[0037] First, an operator operates the rail transport vehicle 100 to move it to a desired location on the slope. The excavation member body 83 is placed on a loading platform by another rail transport vehicle (not shown) having a loading platform, and is moved on the same rail R to the desired location on the slope.

[0038] After the worker moves the rail transport vehicle 100 to the desired location, the worker adjusts the crane 20 to be horizontal using the tilting support mechanism 40, and in conjunction with this, tilts and raises the main outriggers 50 in the traveling direction of the carriage 10. Here, the pair of main outriggers 50 are raised parallel to each other and along the vertical direction.

[0039] After raising the main outriggers 50 in this manner, the worker extends the main outriggers 50 vertically downward and lands the main outriggers 50 on the slope so that the left and right sides of the bogie body 11 are horizontal. Here, the extensions 52 of the main outriggers 50 are landed on a base B buried in the slope, so that the main outriggers 50 are interposed between the slope and the bogie 10 to support the bogie 10, and the bogie 10 is stably placed on the rails R.

[0040] After the carriage 10 is supported by the main outriggers 50, the worker tilts the auxiliary outriggers 60 in the traveling direction of the carriage 10 using the tilting mechanism 70 to raise them. Here, the multiple auxiliary outriggers 60 are raised parallel to each other and along the vertical direction.

[0041] After raising the auxiliary outriggers 60 in this manner, the worker extends the auxiliary outriggers 60 vertically downward. Here, the worker lands the extensions 62 of the auxiliary outriggers 60 on the base B buried in the sloping ground, whereby the auxiliary outriggers 60 are interposed between the sloping ground and the dolly 10 to support the dolly 10, and the dolly 10 is stably placed on the rails R.

[0042] After the cart 10 is supported by the auxiliary outriggers 60, the worker operates the boom 22, and the excavation member mounting part 81 moves onto the platform on which the transmission mechanism 82 and the excavation member main body 83 are placed. On this platform, the worker connects a hydraulic oil supply hose or a compressed air supply hose to the transmission mechanism 82, which has been transported lying on its side, and uses the hook 23 to raise the transmission mechanism 82, temporarily fixing it on the platform with a single pipe or the like, and attaching it to the excavation member mounting part 81. Thereafter, the excavation member main body 83, which has been transported lying on its side, is raised by the hook 23 and attached to the transmission mechanism 82.

[0043] After the transmission mechanism 82 and the excavation member main body 83 are attached to the excavation member attachment portion 81, the operator operates the boom 22 to move the excavation member 80 above the location where the hole H is to be excavated.

[0044] After the drilling member 80 has been moved above the location where the hole H is to be made, the operator lands the drilling member 80 on the slope.

[0045] After the excavation member body 83 lands on the slope, the worker excavates the slope from the cart 10 using the excavation member 80. Here, the worker rotates the transmission mechanism 82 to rotate the excavation member body 83, and supplies compressed air to the excavation member body 83 to strike it and excavate it.

[0046] In addition, in response to excavation by the excavation member 80, the worker lowers and retracts the boom 22. Specifically, as shown in Fig. 4, as the excavation member main body 83 penetrates into the ground, the worker operates the boom 22 to lower the telescopic member 222 and retract the telescopic member 222.

[0047] As the excavation progresses, it is necessary to lower the position of the excavation member 80 in the ground in the vertical direction. Therefore, the worker operates the boom 22 to lower the telescopic member 222 while contracting the telescopic member 222, and lower the tip of the telescopic member 222 in the vertical direction. As a result, the excavation member main body 83 is lowered in the vertical direction, and a hole H extending in the vertical direction is excavated.

[0048] After the hole H reaches the target depth, the worker pulls the excavation member body 83 out of the ground. Here, as the excavation member body 83 is pulled out of the hole H, the worker raises the excavation member 222 and extends the excavation member 222. This causes the excavation member body 83 to rise vertically.

[0049] After the excavation member body 83 has been pulled out of the hole H, the worker removes the excavation member body 83 from the transmission mechanism 82. Here, the worker operates the boom 22 to move the excavation member body 83 to the transported loading platform. Then, the excavation member body 83 is temporarily fixed on the loading platform by, for example, a single pipe, and the excavation member body 83 is separated from the transmission mechanism 82. After that, the worker operates the crane 20 to store the separated excavation member body 83 in the loading platform.

[0050] After storing the excavation member main body 83 in the loading platform, the worker removes the transmission mechanism 82 from the excavation member mounting part 81. Specifically, the transmission mechanism 82 is temporarily fixed on the loading platform by, for example, a single-tube pipe, and the transmission mechanism 82 is separated from the excavation member mounting part 81. Thereafter, the worker operates the crane 20 to store the separated excavation member mounting part 81 in the loading platform that was transported.

[0051] After the transmission mechanism 82 is removed, the worker inserts the pillar P into the hole H and fixes it. Here, the worker hoists the pillar P with the hook 23 and operates the boom 22 to move the pillar P directly above the hole H. Then, the worker lowers the hook 23 to insert the pillar P vertically into the hole H. Thereafter, the worker temporarily fixes the pillar P into the hole H by using, for example, a camber or ballast.

[0052] When the temporary fixing of the pillar P is completed, the worker moves the rail transport vehicle 100 to the construction site of the next pillar P. Specifically, the worker stores the crane 20 in the carriage body 11 by the tilting support mechanism 40, and retracts and stores the main outriggers 50 or the auxiliary outriggers 60. Note that another rail transport vehicle in which the transmission mechanism 82 or the excavation member body 83 is stored also moves along with the movement of the rail transport vehicle 100.

[0053] After the rail transport vehicle 100 has moved to the installation site for the next pillar P, the main outriggers 50 are raised and the pillar P is temporarily fixed at that location in the same manner as described above.

[0054] When all or a certain number of the pillars P have been temporarily fixed, another rail transport vehicle with a loading platform is used to transport the filler. The worker operates the crane 20 of the rail transport vehicle 100 to cast the filler between the hole H and the pillar P, and fix the pillar P.

[0055] Thereafter, when all planned pillars P have been fixed, the worker installs a fence to prevent rockfall between adjacent pillars P. Specifically, the worker attaches a fence such as a wire rope or wire mesh to the hook 23 of the crane 20, hoists the fence, and installs it between the adjacent pillars P.

[0056] <Effects of this embodiment> According to the excavation method of this embodiment, the cart 10 is placed on the rail R laid on the slope, and the excavation member 80 excavates the slope from the cart 10, so that the rail R on which the cart 10 runs is also used for excavation or installation of the support pillar P. Therefore, there is no need to build a new work platform to excavate the slope as in the conventional method, and no construction work is required to install the crane 20, so the workability of the construction method for excavating the slope and installing the support pillar P can be improved. In addition, there is no need to cut down trees except in the place where the rail R is laid, so the burden on the environment can be reduced compared to the case where a work platform is built and a separate crane 20 is installed.

[0057] Furthermore, according to this embodiment, the boom 22 is rotated to adjust the position of the excavation member 80, and then the boom 22 is operated to land the excavation member 80 on the slope before excavation, so excavation can be performed within a range where the boom 22 can reach and does not cause an obstacle to the rail transport vehicle 100 or the rail R. Therefore, the location where the rail R is laid can be selected for the construction site where the support P, which is a structure, is installed, so that the rail R can be laid avoiding places where standing trees grow, compared to the case where a work platform is installed. As a result, only standing trees that are obstacles at the construction site and the place where the rail R is laid need to be cut down, so that the cutting of standing trees can be reduced, and the burden on the environment can be reduced, compared to the case where a work platform is installed.

[0058] In addition, since the excavation member 80 and the hook 23 are provided on the same boom 22, the two tasks of excavation and installation of the support pillars P can be performed within the working radius of the same boom 22, compared to a configuration in which the excavation member 80 and the hook 23 are provided on separate booms 22. Therefore, when considering the construction procedure, it is possible to perform the two tasks of excavation and installation of the support pillars P without moving the rail transport vehicle 100 by simply considering the working capacity range of the heavier state, thereby improving the convenience of the work. Also, it is possible to operate with the same working mechanism, which simplifies the working mechanism or work procedure. Here, the excavation member 80 is connected to the boom 22 on the transported platform and assembled. Since the excavation member 80 and the hook 23 are both provided at the tip of the boom 22, when the excavation member 80, which has been transported lying down, is lifted up and erected by the hook 23, the excavation member 80 can be erected near the position where it is attached to the boom 22, and the attachment work can be performed safely and easily. Similarly, since the excavation member 80 and the hook 23 are both provided at the tip of the boom 22, when the excavation member 80 is removed from the boom 22, the travel distance for removing the excavation member 80 from the boom 22 and attaching it to the hook 23 can be shortened. As a result, high safety is obtained and the workability is excellent.

[0059] Furthermore, a plurality of auxiliary outriggers 60 are provided in addition to the main outrigger 50, and the slope is excavated with the main outrigger 50 or the auxiliary outrigger 60 landed on the slope, so that the cart 10 can be stably placed on the rail R on the slope and deformation of the rail can be prevented, thereby improving the safety of the work. Particularly in recent years, with the improvement in the capabilities of structures such as rockfall protection fences, there is an increasing need to use larger materials and equipment during construction and to install large supports P on sloping ground, and since construction is performed with the main outriggers 50 or auxiliary outriggers 60 landed on the sloping ground and supporting the cart 10, large materials and equipment can be loaded onto the cart 10. Therefore, there is no need to build a large-scale work platform as in the past, which makes it possible to reduce manpower, materials, time, and costs, and since the scale of construction is smaller, the burden on the environment, such as the felling of standing trees, can be reduced.

[0060] <Other Modified Embodiments> The present invention is not limited to the above-described embodiment.

[0061] In this embodiment, the excavation member 80 includes one excavation member body 83, but may include one or more extension rods 84 interposed between the transmission mechanism 82 and the excavation member body 83. The extension rod 84 is columnar, has a flow path formed therein so that compressed air can be supplied to the excavation member body 83, and rotates by the rotational force transmitted from the transmission mechanism 82.

[0062] Here, a construction method for excavating a slope using the extension rod 84 and installing the support P will be described with reference to FIG.

[0063] The extension rod 84 is placed on a platform of another rail transport vehicle (not shown) having a platform together with the excavation member body 83 and moved to a desired location on the slope.

[0064] If the excavation by the excavation member body 83 progresses and the hole H has not reached the target depth even when the boom 22 is fully lowered, the worker separates the excavation member body 83 from the transmission mechanism 82. Then, the worker operates the boom 22 to move the excavation member attachment part 81 and the transmission mechanism 82 onto the loading platform. After that, the worker uses the hook 23 to raise the extension rod 84, which has been transported lying on its side on the loading platform, and temporarily fixes it with, for example, a single pipe, and connects it to the transmission mechanism 82.

[0065] After the extension rod 84 is attached to the transmission mechanism 82, the worker operates the boom 22 to place it on the excavation member body 83. Here, the worker connects the excavation member body 83 and the extension rod 84 with, for example, a hexagonal joint, but the connection between the excavation member body 83 and the extension rod 84 is not limited to a hexagonal joint.

[0066] After the extension rod 84 is connected to the excavation member body 83, the worker excavates the slope from the cart 10 using the excavation member 80 in the same manner as the excavation method described above. By inserting the extension rod 84 into the ground, the hole H becomes deeper than when excavated using a single excavation member body 83. Note that if the excavation using the excavation member body 83 progresses and the hole H has not yet reached the target depth even when the boom 22 is completely lowered, the extension rod 84 may be further connected to the transmission mechanism 82 and excavation may continue.

[0067] After the hole H reaches the target depth, the worker pulls out the excavation member main body 83 or the extension rod 84 from the hole H. Here, first, the worker operates the boom 22 to pull out the extension rod 84. Specifically, by operating the boom 22, the worker raises the telescopic member 222 while extending the telescopic member 222, and raises the tip of the telescopic member 222 along the vertical direction. As a result, the excavation member main body 83 or the extension rod 84 rises along the vertical direction.

[0068] When the extension rod 84 comes out to the ground surface and the excavation member body 83 or a part of the extension rod 84 connected below the extension rod 84 comes out to the ground surface, the worker fixes the excavation member body 83 or the extension rod 84, which is partly exposed to the ground surface, so that it does not fall into the hole H, and detaches the extension rod 84 from the excavation member body 83. After that, the boom 22 is operated to move the extension rod 84 to the loading platform on which it was transported, and the extension rod 84 is temporarily fixed on the loading platform with a single pipe or the like to prevent the extension rod 84 from falling on the loading platform. The extension rod 84 is detached from the transmission mechanism 82, and the crane 20 is operated to store the detached extension rod 84 on the loading platform. After storing the extension rod 84 on the loading platform, the worker operates the boom 22 to return the transmission mechanism 82 to the hole H, and attaches the excavation member body 83 or the extension rod 84, which is partly exposed from the hole H, to the transmission mechanism 82. The worker repeats the above operations to remove the excavation member body 83 and all of the extension rods 84 from the hole H and store them on the loading platform.

[0069] After the excavation member body 83 and all of the extension rods 84 are stored in the loading platform, the transmission mechanism 82 is removed and stored in the loading platform in the same manner as in the previous embodiment, and the support pillar P is installed.

[0070] Moreover, the main outrigger 50 or the auxiliary outrigger 60 may further include a horizontal return function for returning the dolly 10 to a horizontal state. Specifically, the horizontal return function is for, when the dolly 10 is lowered to one of the left and right sides with the main outrigger 50 or the auxiliary outrigger 60 landed on a sloping ground, extending the main outrigger 50 or the auxiliary outrigger 60 on the lowered side to return the dolly 10 to a horizontal state in the left-right direction. As a result, even if the main outrigger 50 or the auxiliary outrigger 60 sinks during construction due to insufficient ground strength on the sloping ground, for example, the dolly 10 is returned to a horizontal state in the left-right direction by the horizontal return function. Therefore, even on a sloping ground with insufficient ground strength, construction can be performed with the dolly 10 stably placed on the rail R, improving the safety of the work. The horizontal return operation may be performed manually.

[0071] When the main outrigger 50 or the auxiliary outrigger 60 has a horizontal return function, the main outrigger 50 or the auxiliary outrigger 60 may further have a safety mechanism for preventing deformation of the rail R by lifting the rail R. Specifically, when the bogie 10 is returned to horizontal in the left-right direction by the horizontal return function of the main outrigger 50 or the auxiliary outrigger 60 on one side, the safety mechanism monitors the load applied to the main outrigger 50 or the auxiliary outrigger 60 on the other side and operates taking into account the load at the time of the final manual operation, etc.

[0072] In this embodiment, the drilling member 80 is a so-called down-the-hole hammer, but the drilling member 80 is not limited to the down-the-hole hammer and may be another drilling member such as a drill.

[0073] In this embodiment, the excavation member 80 is provided to the carriage 10 via the boom 22, but the excavation member 80 may be provided directly to the carriage 10.

[0074] In this embodiment, the rail transport vehicle 100 is configured to include the hook 23, but it does not have to be configured to include the hook 23.

[0075] In this embodiment, the rail transport vehicle 100 is configured with a pair of main outriggers 50 or four auxiliary outriggers 60, but it does not have to be equipped with the main outriggers 50 or the auxiliary outriggers 60, and the number of auxiliary outriggers 60 is not limited to four but may be more or less than four.

[0076] In this embodiment, the rail transport vehicle 100 is configured to include an excavation member main body 83, but the rail transport vehicle 100 may not necessarily be configured to include an excavation member main body 83.

[0077] In this embodiment, the rail transport vehicle 100 is configured to have the traveling drive source 30 on the cart 10, but is not limited to the traveling drive source 30, and the cart 10 may be moved by a towing vehicle that tows the cart 10, for example.

[0078] In the present embodiment, the various devices are driven by a hydraulic pump. However, the various devices may be driven electrically or manually, for example.

[0079] Additionally, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0080] 100 ···Rail transport vehicle 10... Cart 20. Crane 22. Boom 23. Hook 30 Driving source 40...Tilt support mechanism 50 ···Main outrigger 60 Auxiliary outrigger 80 ... Excavation member 81 ...Excavation member attachment portion 82 Transmission mechanism 83 ... Excavation member body R Rail P...Prop H...Hole

Claims

1. A construction method using a rail transport vehicle including a carriage that runs on a rail laid on a slope, an excavation member that is mounted on the carriage and excavates the slope, and a crane that is mounted on the carriage and hoists a structure, With the carriage placed on the rail, the excavation member excavates the slope from the carriage, A construction method in which the structure is installed in a hole excavated by the excavation member while the cart is placed on the rail.

2. The rail transport vehicle further includes a boom that is extendable, retractable, and rotatable on the carriage and can be raised and lowered between a raised state and a lowered state; The excavation member is provided on the carriage via the boom, The construction method includes: The excavation member is landed on the slope by manipulating the extension and contraction state of the boom, the rotation state of the boom, or the elevation and descent state of the boom, The construction method according to claim 1 , wherein the excavation member excavates the slope by lowering or extending the boom.

3. The rail transport vehicle further includes a hook provided on the boom and capable of ascending and descending relative to the boom, The excavation member and the hook are provided at the tip of the boom, The construction method includes: With the rail transport vehicle placed on the rail, an article is attached to the hook; The boom is operated to raise the hook and lift the structure; The construction method according to claim 2 , further comprising installing the structure in a hole excavated by the excavation member.

4. The rail transport vehicle is A pair of main outriggers are disposed on both sides of the rail and are interposed between the slope and the bogie to support the bogie; and an auxiliary outrigger disposed at least one of in front of or behind the main outrigger and interposed between the slope and the carriage to support the carriage, The construction method includes:

2. The construction method according to claim 1, wherein the cart is placed on the rails, and with the main outrigger or the auxiliary outrigger landed on the slope, the excavation member excavates the slope from the cart, and the structure is installed in the hole excavated by the excavation member.

5. When the carriage is placed on the rail and the main outrigger or the auxiliary outrigger is landed on the slope, if the carriage tilts left or right, The construction method according to claim 4 , further comprising extending the main outrigger or the auxiliary outrigger on the lowered side to return the carriage to a horizontal position in the left-right direction.

6. A cart that runs on a rail laid on a slope; An excavation member provided on the carriage for excavating the slope; A rail transport vehicle equipped with a crane mounted on the cart for lifting a structure.

7. A cart that runs on a rail laid on a slope; An excavation member mounting portion provided on the carriage and to which an excavation member for excavating the slope is attached; A rail transport vehicle equipped with a crane mounted on the cart for lifting a structure.

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