JP3694656B2 - Movable jack jack moving device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a propulsion jack moving apparatus for a propulsion method in which a cushioning material is mounted on the top and bottom of a joint portion of a propulsion tube row in a propulsion method for embedding a propulsion tube or the like in the ground.
[0002]
[Prior art]
In the propulsion method, the excavator and the propelling pipe are specified by pressing the rear end of the propelling pipe row with a main jack installed in the start shaft while cutting the ground in front with an excavating means such as a leading excavator. It is a method of burying in the position of. When the propulsion pipe is embedded in a straight line, the joint portion of the propulsion pipe is brought into contact with the end face to uniformly transmit the propulsion force of the main push jack to the entire cross section, thereby maintaining linearity. Normally, the main jack is arranged in order to load the excavation residual soil 6 during the propulsion work into the trobucket 5 or the like, carry it into the shaft through the pipe, and carry the trobucket 5 out of the shaft from the vertical shaft In order to ensure workability and safety by opening, a plurality of rows have been arranged at symmetrical positions on the left and right sides of the end face of the propulsion pipe 1.
[0003]
However, in recent years, the demand for curve propulsion construction has increased, so in the case of horizontal curve propulsion construction, the propulsion pipe following the excavator can follow the tunnel hole of the planned curve created by the excavator. Are mounted on the upper and lower sides of the end face of the joint portion of the propulsion pipe 1. By attaching the cushion material 8 up and down, the propulsion pipe 1 makes it easy to follow the left and right curved tunnel holes with the upper and lower portions as fulcrums. At this time, transmission of thrust for moving the propelling pipe 1 forward is performed through the cushion material 8. As the disposition of the push jack, a method of disposing at the left and right symmetrical positions of the propulsion pipe end face has been used regardless of the curve forming conditions. For this reason, when the cushion material 8 is arranged in the vertical position, a displacement occurs between the thrust position of the main jack and the thrust transmission position of the cushion material, so that a shearing force and a bending moment act on the end face of the propulsion pipe, Cracks were generated on the pipe wall.
[0004]
[Problems to be solved by the invention]
The invention of Japanese Patent Application No. 2001-823 has been proposed in order to eliminate the cracks caused by the shear force. This technique is a method of disposing a push jack in accordance with the vertical position corresponding to the position of the cushion material mounted on the top and bottom of the joint portion end face of the propulsion pipe. By this method, the thrust of the main jack is transmitted to the propulsion pipe without deviation, so no shearing force or bending moment acts on the propulsion pipe wall, and the propulsion work is carried out efficiently without causing cracks. It became possible. However, since multiple main jacks are arranged at the top, when a soil pressure type excavator is adopted depending on the soil conditions, the toro bucket for carrying the excavated residual 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 push jack position is performed, but it is a very dangerous and inefficient operation. Furthermore, a method of continuously transporting pipes with a pressure feeder or a vacuum pump will be considered, but if the propulsion extension becomes a long distance, the capacity of the pressure feeder or the vacuum pump is limited, and it becomes impossible to cope with it, making the propulsion work difficult. .
[0005]
For this reason, the present invention provides a moving device for a main jack that can efficiently carry out propulsion work even over a long distance in a soil pressure type propulsion method performed by attaching a cushion material to a joint portion of a propulsion pipe row. .
[0006]
[Means for Solving the Problems]
In other words, the present invention provides a main jack moving device for installing a cushioning material on the upper and lower ends of the joint portion end face of the propulsion pipe row and constructing the earth pressure system propulsion method.
A jack support frame in which a plurality of original push jacks are arranged in accordance with the vertical position corresponding to the mounting position of the cushion material;
A carriage mounted with the jack support frame and movable in a direction perpendicular to the propulsion direction;
This is a main push jack moving device that moves the main push jack position to the side from the center position of the propulsion pipe.
Further, the present invention provides a moving device for the main push jack, which is mounted on the carriage on the side of the jack support frame and has a switching track for a trobucket configured so as to be substantially the same height as the inner rail laid in the propulsion pipe. .
[0007]
As the propulsion pipe, a centrifugal reinforced concrete pipe usually used for propulsion work is used. A cushion material is installed in the joint of the propulsion pipe in accordance with the shape of the curve. In the case of horizontal curve propulsion, cushion materials are installed above and below the tube end surface, and in the case of vertical curve propulsion, cushion materials are installed on the left and right sides of the tube end surface. As the cushion material, a material that can transmit thrust over the entire surface of the cushion material and does not hinder the formation of a curve is preferable, and a plastic material having a wide plastic region is usually used.
[0008]
For the push jack, the necessary thrust is calculated from the soil condition, the propulsion distance, the propulsion pipe diameter, etc., and the number corresponding to the thrust is prepared. The arrangement of the 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 fixing of the main pushing jacks is incorporated in the jack supporting frame so that each of the pushing jacks comes into contact with the end face of the propulsion pipe.
[0009]
The carriage on which the jack support frame is mounted has substantially the same width as the length when the main jack is reduced, and has a strong structure that can withstand the weight of the jack support frame. A plurality of wheels are provided below the carriage, and the carriage can move on a carriage rail laid in a direction perpendicular to the propulsion direction.
[0010]
The tro-bucket switching track mounted on the carriage is assembled by adjusting the height with H steel or the like so as to be substantially the same as the height of the inner rail laid in the propulsion pipe. When the propulsion pipe moves forward due to the extension of the main jack, a gap is formed between the inner rail in the propulsion pipe and the switching track for the trobucket on the carriage. It is possible to use a method of preparing another carriage equipped with a switching track for a trobucket in front of the carriage and connecting the rails.
[0011]
During propulsion construction of the propulsion pipe, the carriage 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 propulsion embedded in the ground. Residual soil unloaded from the excavator at the tip along with the propulsion embedding of the propulsion pipe is loaded into the toro bucket. When the remaining soil in the Toro bucket is full, temporarily stop the propulsion work, reduce the main jack and cut the edge with the propulsion pipe, move the carriage in a direction perpendicular to the propulsion direction, and The toro bucket switching track mounted on is fixed at a position that matches the rail position in the propulsion pipe. The toro bucket is moved from the inside of the propulsion pipe to the start shaft, and the toro bucket is lifted by a crane or other lifting equipment provided on the ground, and the remaining soil is disposed at a predetermined place on the ground. When the disposal of the remaining soil is completed, the toro bucket is returned into the propulsion pipe, the jack support frame mounted on the carriage is returned to the vertical axis position of the propulsion pipe, the main push jack is extended, and the propulsion embedding of the propulsion pipe is resumed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating a moving device for a main jack according to the present invention. On the top and bottom of the end face of the propulsion pipe 11, five original push jacks 2 are arranged and fixed by a jack support frame 1. The lower end of the jack support frame 1 is fixed to a carriage 3 having a predetermined length in a direction perpendicular to the propulsion direction. A plurality of wheels 4 are provided at a lower portion of the carriage 3 at a predetermined interval in a direction perpendicular to the propulsion direction, and are movable on a carriage rail 5 laid in a direction perpendicular to the propulsion direction. It has become. In the propulsion pipe 11, a toro bucket 9 for carrying out the residual soil excavated by the excavator is disposed, and can be moved in the propulsion direction on the inner rail 10 laid in the propulsion pipe 11.
[0013]
In this embodiment, the installation number of the main pushing jacks 2 is exemplified by 10 units of 5 pieces up and down. However, the number of installation of the main pushing jacks 2 depends on the diameter of the propulsion pipe 11, the soil condition, and the propulsion extension in advance. It is determined by calculating the thrust by a predetermined formula.
[0014]
The arrangement of the main push jack 2 is considered so as to fall within the range of a cushion material (not shown) mounted on the top and bottom of the end face of the propulsion pipe 11.
[0015]
The width of the carriage 3 is made substantially the same as the length when the main push jack 2 is reduced in order to secure a space when the propulsion pipe 11 is installed.
[0016]
FIG. 2 is a front view for explaining a moving device for the main push jack in which the trolley bucket switching track is mounted on the carriage. A switching track 6 for a trobucket is provided on the side of the jack support frame 1. The switching rail 8 is adjusted by combining an adjusting material 7 such as an H steel material so as to be the same as the height of the in-tube rail 10 laid in the propulsion pipe 11. When unloading the remaining soil of the toro bucket 9, the carriage 3 is moved in a direction perpendicular to the propulsion direction, and is fixed at a position where the trobucket switching track 6 and the in-pipe rail 10 in the propulsion pipe 11 are aligned. At this time, the jack support frame 1 has moved to the side of the propulsion pipe 11 and does not hinder the loading / unloading of the toro bucket 9.
[0017]
When the propulsion pipe 11 moves forward, the remaining soil is carried out because there is a gap between the inner rail 10 of the propulsion pipe 11 and the switching rail 8 of the carriage 3. For example, a method of installing another cart 3 on which only the trobucket switching track 6 is mounted in front of the cart 3 of the present invention and connecting the switching rails are used.
[0018]
When carrying in / out the toro bucket 9 during propulsion construction, it is necessary to install a connecting rail along with the movement of the jack support frame 1 and the suspension time of the propulsion construction increases. By installing several trobuckets 9 in the pipe, the remaining soil for one propulsion pipe 11 can be held in the trobucket 9 in the propulsion pipe until the propulsion work is completed, and when the next propulsion pipe 11 is connected By carrying out the method of moving the carriage 3 with the above, installation work of the connecting rail becomes unnecessary, and efficient propulsion construction can be performed.
[0019]
In the present embodiment, the moving device 3 of the main jack equipped with the switching track 6 for the trobucket is disclosed. However, the carriage 3 is provided with only the jack support frame 1, and the rear rail outside the propulsion pipe 11 is installed each time. It is also possible to use a method to do this.
[0020]
【The invention's effect】
As described above, with the moving device of the main push jack of the present invention, even in the earth pressure system curve propulsion construction that has been difficult in the past, the excavation of the excavated residual soil by the toro bucket is an obstacle in the upper part of the vertical shaft. There is no such thing, and very efficient and safe work can be done.
[0021]
[Brief description of the drawings]
FIG. 1 is a front view illustrating a moving device for a main jack according to the present invention.
FIG. 2 is a front view for explaining a moving device for a main jack having a trolley bucket switching track mounted on a carriage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Jack support frame 2 Main pushing jack 3 Car 4 Wheel 5 Car rail 6 Toro bucket switching track 7 Adjustment material 8 Switching rail 9 Toro bucket 10 Inner rail 11 Propulsion pipe

Claims (2)

In the main jack moving device that installs a cushioning material on the top and bottom of the joint end face of the propulsion pipe row and constructs the earth pressure type propulsion method,
A jack support frame in which a plurality of original push jacks are arranged in accordance with the vertical position corresponding to the mounting position of the cushion material;
A carriage mounted with the jack support frame and movable in a direction perpendicular to the propulsion direction;
A moving device for the main pushing jack, characterized in that it moves the position of the main pushing jack from the center position of the propulsion pipe to the side. The trobucket switching track configured to have a height substantially the same as the height of the inner rail laid in the propulsion pipe is mounted on a carriage on the side of the jack support frame. The former push jack moving device.

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