JP2002339688A - Moving device of base pressing jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving device of a base pressing jack for efficiently performing jacking execution work even at a long distance in a pipe jacking method of an earth pressure system performed by installing a cushion material in a joint part of a jacking pipe row. SOLUTION: This moving device of the base pressing jack executes the pipe jacking method of the earth pressure system by installing the cushion material above and below a joint part end surface of the jacking pipe row, and is composed of a jack support frame for arranging a plurality of base pressing jacks according to a vertical position corresponding to an installing position of the cushion material, and a carriage movable in the right-angled direction to the jacking direction by mounting the jack support frame, and moves a base pressing jack position to the side from a central position of a jacking pipe, and is mounted with a switching track for a grout bucket constituted on the carriage on the side of the jack support frame so as to become the almost same height as the height of an inline rail laid in the jacking pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for moving a primary push jack in a propulsion method in which a cushioning material is mounted above and below a joint of a row of propulsion pipes in a propulsion method in which a propulsion pipe or the like is buried underground. Things.

[0002]

2. Description of the Related Art The propulsion method is to press the rear end of a row of propulsion pipes with a main push jack installed in a starting shaft while cutting the ground in front by a digging means such as an excavator at the tip.
This is a method of burying an excavator and a propulsion pipe at a predetermined position. In the case where the propulsion pipe is buried in a straight line, the joint portion of the propulsion pipe abuts the end face to transmit the propulsive force of the main push jack evenly to the entire cross section, thereby maintaining the linearity. In general, the arrangement of the main push jack is such that the excavated soil 6 during the propulsion work is loaded on the trolley bucket 5 and the like, and is carried out through the pipe into the shaft, and the trolley bucket 5 is carried out from the shaft to the upper pit outside. The propulsion pipe 1 has been used in a plurality of rows at symmetrical positions on the left and right sides of the end face of the propulsion pipe 1 to ensure workability and safety.

[0003] However, in recent years, the demand for curve propulsion construction has increased, and horizontal curve propulsion has been performed so that a propulsion pipe following the excavator can follow the tunnel hole of the planned curve formed by the excavator. In the case of construction, cushion materials 8 are attached above and below the joint section end face of the propulsion pipe 1. By mounting the cushion material 8 up and down, the propulsion pipe 1 can easily follow the left and right curved tunnel holes with the upper and lower portions as fulcrums. At this time, the transmission of the thrust for moving the propulsion pipe 1 forward is performed through the cushion material 8. Regarding the arrangement of the main push jacks, a method of arranging them at symmetrical positions on the left and right sides of the end face of the propulsion pipe has been used regardless of the conditions for forming the curve. For this reason, when the cushion material 8 is arranged in the up and down position, a shift occurs between the thrust position of the original pushing jack and the thrust transmitting position of the cushion material, so that a shearing force or a bending moment acts on the end face of the propulsion pipe, Cracks and the like occurred on the pipe wall.

[0004]

The invention of Japanese Patent Application No. 2001-823 has been proposed in order to eliminate the cracks caused by the shearing force described above. This technique is a method of arranging a main push jack in accordance with a vertical position corresponding to a cushion material position mounted above and below an end face of a joint portion of a propulsion pipe. By this method, the thrust of the main push jack is transmitted to the propulsion pipe without displacement, so that the shearing force and bending moment do not act on the wall of the propulsion pipe, and the propulsion work is efficiently performed without generating cracks etc. It became possible. However, since a plurality of main jacks are arranged at the top, when using an earth pressure excavator due to soil conditions, etc., a tro bucket for removing the excavated soil from the pipe to the shaft can be taken out. There was no problem. For this reason, a method of hanging the toro bucket obliquely from the side of the original pushing jack position or the like is performed, but this is extremely dangerous and inefficient work. Furthermore, a method of continuously transporting pipes using a pump or a vacuum pump will be considered. However, if the propulsion lengthens, the capacity of the pump and the vacuum pump will be limited, and it will not be possible to cope with the propulsion. .

[0005] Therefore, the present invention provides an apparatus for moving a main push jack which can efficiently perform propulsion work even over long distances in an earth pressure type propulsion method in which a cushion material is attached to a joint portion of a propulsion pipe row. Things.

[0006]

In other words, the present invention relates to an original pushing jack moving device for mounting a cushion material above and below an end face of a joint portion of a propulsion pipe row and performing an earth pressure propulsion method. A jack support frame for arranging a plurality of main push jacks in accordance with the vertical position corresponding to the mounting position, and a bogie mounted with the jack support frame and movable in a direction perpendicular to the propulsion direction, This is a moving device of the original pushing jack for moving the pushing jack position from the center position of the propulsion pipe to the side. Further, the present invention is a moving device of an original push jack, on which a switching track for a trolley bucket configured to have a height substantially equal to a height of an in-pipe rail laid in a propulsion pipe is mounted on a bogie on a side of the jack support frame. .

As the propulsion pipe, a centrifugal reinforced concrete pipe usually used for propulsion work is used. At the joint of the propulsion pipe, a cushion material is installed according to the shape of the curve. In the case of horizontal curve propulsion, cushion materials are installed above and below the pipe end face, and in the case of vertical curve propulsion, cushion materials are installed on the left and right of the pipe end face. As a cushion material, thrust can be transmitted over the entire cushion material,
A material that does not hinder the formation of the curve is preferable, and a plastic material having a wide plastic region is usually used.

The required thrust of the main push jack is calculated from the soil condition, the propulsion distance, the diameter of the propulsion pipe, and the like, and the number of jacks corresponding to the thrust is prepared. The arrangement of the main push jack is set in accordance with the position of the cushion material mounted above and below the joint portion of the propulsion pipe. The main push jacks are fixed to the jack support frame so that each main push jack abuts on the end face of the propulsion pipe.

The bogie on which the jack supporting frame is mounted has substantially the same width as the length of the original jack when the jack is reduced, and has a strong structure that can withstand the weight of the jack supporting frame. A plurality of wheels are provided below the truck, and the truck can move on a truck rail laid in a direction perpendicular to the propulsion direction.

The switching track for the trolley bucket mounted on the bogie is assembled with H steel or the like so that the height thereof is adjusted to be substantially the same as the height of the guide rail laid in the propulsion pipe. . When the propulsion pipe advances due to the extension of the main push jack, a gap is formed between the in-pipe rail in the propulsion pipe and the switching track for the trolley bucket on the bogie. A method of preparing another truck equipped with a switching track for the trolley bucket in front of the truck and connecting the rails can be used.

During the propulsion of the propulsion pipe, the bogie is fixed at a position where the jack support frame coincides with the vertical axis of the propulsion pipe. The thrust is transmitted from the upper and lower cushion materials to the propulsion pipe by the extension of the main push jacks arranged above and below, and the propulsion pipe is buried underground. The remaining soil carried out from the excavator at the tip accompanying the propulsion burial of the propulsion pipe is loaded in the tro bucket. When the remaining soil in the toro bucket is full, the propulsion work is suspended, the main jack is reduced, the edge of the propulsion pipe is cut off, the bogie is moved in a direction perpendicular to the propulsion direction, and the side of the jack support frame is The switching path for the trolley bucket mounted on the vehicle is fixed at a position that matches the position of the rail in the propulsion pipe. The toro bucket is moved from the propulsion pipe to the starting shaft side, the toro bucket is lifted by a hanging facility such as a crane provided on the ground, and the remaining soil is disposed at a predetermined place on the ground. When the disposal of the residual soil is completed, the tro bucket is returned into the propulsion pipe, the jack supporting frame mounted on the bogie is returned to the vertical axis position of the propulsion pipe, the main jack is extended, and the propulsion embedding of the propulsion pipe is resumed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view illustrating a moving device of a main push jack according to the present invention. Five main push jacks 2 are respectively arranged above and below the end face of the propulsion pipe 11, and are fixed by a jack support frame 1. The lower end of the jack support frame 1 is fixed to a bogie 3 having a predetermined length in a direction perpendicular to the propulsion direction. At the bottom of the trolley 3,
A plurality of wheels 4 are provided at predetermined intervals in a direction perpendicular to the propulsion direction, and have a structure capable of moving on a bogie rail 5 laid in a direction perpendicular to the propulsion direction. In the propulsion pipe 11, a toro bucket 9 for unloading the remaining soil excavated by the excavator is arranged, and is movable in a propulsion direction on an in-pipe rail 10 laid in the propulsion pipe 11.

In the present embodiment, the number of the main jacks 2 is exemplified by ten, five at the top and bottom, but the number of the main jacks 2 can be set according to the diameter of the propulsion pipe 11, the soil condition and the propulsion extension. Is determined in advance by calculating the thrust by a predetermined formula.

The arrangement of the main push jack 2 is considered so as to fall within the range of a cushion material (not shown) mounted above and below the end face of the propulsion pipe 11.

The width of the bogie 3 is made substantially the same as the length of the main push jack 2 when it is reduced in order to secure a space when the propulsion pipe 11 is installed.

FIG. 2 is a front view for explaining a moving device of the main push jack in which the trolley bucket switching track is mounted on the bogie. On the side of the jack support frame 1, a switching track 6 for the trolley bucket is provided. The switching rail 8 includes a propulsion pipe 11
The height is adjusted by combining an adjusting material 7 such as H steel so as to have the same height as the in-pipe rail 10 laid inside. When the remaining soil of the trolley bucket 9 is carried out, the bogie 3 is moved in a direction perpendicular to the propulsion direction, and is fixed at a position where the trolley bucket switching track 6 and the position of the in-pipe rail 10 in the propulsion pipe 11 match. At this time, the jack support frame 1 is
1 and does not hinder carrying in and out of the toro bucket 9.

At the time when the propulsion pipe 11 advances, the residual soil is unloaded when a gap is formed between the rail 10 of the propulsion pipe 11 and the switching rail 8 of the bogie 3. A method of installing a connecting rail, a method of preparing another truck 3 in which only the trolley bucket switching track 6 is mounted in front of the truck 3 of the present invention, and connecting the switching rails, and the like are used.

At the time of loading and unloading the toro bucket 9 during the propulsion construction, the connecting rails must be installed together with the movement of the jack support frame 1, and the downtime of the propulsion construction increases. However, by installing several toro buckets 9 in the propulsion pipe, the remaining soil of one propulsion pipe 11 can be retained in the toro bucket 9 in the propulsion pipe until the completion of the propulsion construction. By performing the method of moving the trolley 3 at the time of connection,
The installation work of the connecting rail is not required, and efficient propulsion construction can be performed.

In the present embodiment, the moving device 3 for the main push jack on which the switching track 6 for the trolley bucket is mounted is disclosed. However, the bogie 3 on which only the jack support frame 1 is mounted, and the rear rail outside the propulsion pipe 11 is It is also possible to use a method of setting each time.

[0020]

As described above, the moving device for the main push jack according to the present invention enables the removal of the excavated soil by the tro bucket into the vertical shaft even in the earth pressure type curve propulsion construction, which was conventionally difficult to carry out. There was no obstacle in the upper part, and it became possible to perform very efficient and safe work.

[0021]

[Brief description of the drawings]

FIG. 1 is a front view illustrating a moving device of a main push jack of the present invention.

FIG. 2 is a front view illustrating a moving device of a main push jack in which a trolley bucket switching track is mounted on a cart.

[Description of Signs] 1 Jack support frame 2 Main pushing jack 3 Bogie 4 Wheel 5 Bogie rail 6 Toro bucket switching track 7 Adjusting material 8 Switching rail 9 Toro bucket 10 Inner rail 11 Propulsion pipe

Claims (2)

[Claims] 1. An original pushing jack moving device for mounting a cushion material above and below an end face of a joint portion of a propulsion pipe row and performing an earth pressure type propulsion method, wherein a vertical position corresponding to a mounting position of the cushion material is set. A jack support frame for arranging a plurality of main push jacks, and a bogie mounted with the jack support frame and movable in a direction perpendicular to a propulsion direction. A moving device for a primary push jack, which is moved from side to side. 2. The trolley bucket switching track, which is configured to be substantially the same height as an inner rail laid in a propulsion pipe, is mounted on a bogie on a side of the jack support frame. The moving device of the original push jack according to claim 1.