JP4086614B2 - How to cut a pipe left in the ground - Google Patents

Description

[0001]
[Industrial application fields]
The disclosed technology is for tunnels and underdrains, etc. by shield excavation etc. for structures where the outer pipes of synthetic resin etc. used for ground improvement work such as double packer injection are left in the ground. When performing cutting, it belongs to the technical field of the apparatus which cuts and crushes the remaining structure in the ground which becomes an obstacle to the cutting in the remaining state in the ground so as not to obstruct the cutting.
[0002]
As is well known, in the ground improvement work, the outer pipe made of vinyl chloride is often used as the injection pipe for the double packer injection work, but the outer pipe made of vinyl chloride is usually left in the ground after the double packer injection. In order to form tunnels, tunnels, etc. in the area, the outer pipe made of vinyl chloride or the like as a structure remaining in the ground is used as a shield cutter. There was the fault that it was wound around etc. and interfered with the excavation.
[0003]
In order to cope with this, a technique for making the outer pipe made of vinyl chloride or the like easy to be crushed or a technique for keeping a streak inside is considered. It is not completely solved, and there are many problems such as the outer injection tube being crushed during the injection operation.
[0004]
To cope with this, for example, a cutting and crushing device is inserted into a columnar body as a remaining structure in the ground as described in the invention of Japanese Patent Application Laid-Open No. 08-184028, and the cutting blade is used. A technique for cutting and crushing a columnar body from its inside has been developed and specified.
[0005]
Needless to say, in the conventional technology such as the invention of Japanese Patent Application Laid-Open No. 08-184028, which is the kind of prior art document, the cutting and crushing device is a double tube system of a rotation transmission shaft for a guide tube and a cutter provided inside the guide tube. Therefore, the weight is large and the use length is long, so the weight is large, and there is a disadvantage that it is not easy to use. Further, since it is long, there is a problem that the work efficiency is poor.
[0006]
Further, there is a demerit that the structure is complicated by connecting and connecting the rotation driving member to the cutter in the outer tube every predetermined unit, and the maintenance cost and the running cost are increased.
[0007]
OBJECT OF THE INVENTION
The purpose of the invention of this application is to solve the problem of cutting and crushing and removing the columnar structure made of vinyl chloride or the like that remains in the ground based on the above-mentioned conventional technology, and the internal structure in the pipe is simple. In addition, the length does not have to be a long stroke. Therefore, the problem of excessive weight is prevented, it is easy to use, and it is equipped with a predetermined number of cutting and crushing devices in the axial direction. An object of the present invention is to provide an excellent structure for cutting and crushing a remaining structure in the ground, which can be used for cutting and crushing a structure such as a body, which is beneficial to the field of civil engineering use in the construction industry.
[0008]
【means】
In order to solve the above-described problems, the configuration of the invention of the present application, which is summarized in the scope of the above-mentioned claims along the above-mentioned object, is provided with a cutter that expands / contracts the cutter in the radial direction at the front portion of the driving device. It is equipped with a cutter holder, the drive device is connected to a drive source via a power transmission unit, and the cutter blade is pivotally supported by the cutter holder so as to be swingable. Thus, at that time, the drive source is provided integrally with the control device, and the remaining columnar body force in the ground is a pipe made of synthetic resin. The remaining columnar body is a metal pipe, the drive device is formed to be smaller than the inner diameter of the remaining columnar body in the ground, and the operation control unit is Cut off Whether or not it is crushing is detected and the drive device is started and stopped. Further, during the operation stop, the drive device and the cutter blade together with the drive device and the cutter blade are lifted by a predetermined stroke up to the cutting and crushing portion of the next-stage columnar body. This is a technical measure designed to move up and down.
[0009]
[Action]
In the above-described configuration, when the columnar body such as the sleeve pipe in the ground to be left in the ground is shielded when forming a tunnel or the like, the residual columnar body does not wrap around the cutter of the shielded drilling device and obstruct the shielded drilling. A cutter pivotally supported by a cutter holder provided integrally with a drive device provided at the inner end of a sleeve pipe of a predetermined length such as made of vinyl chloride so as to cut and crush the columnar body into a small size in the ground. The blade is lifted by a predetermined stroke and cut and crushed with a predetermined stroke from the inside of the remaining columnar pipe, and is provided integrally with a drive source on the ground during or after cutting and crushing by the cutter. If the driving control device detects the power consumption during driving of the drive device, for example, if the power consumption of 65% or less is detected, the operation control device The supply of power from the drive source to the drive device is interrupted via the control device to stop the cutting and crushing action of the cutter blade due to centrifugal force, and the suspension is suspended, and the predetermined stroke drive device and the cutter blade are lifted together. Ascending and moving to the cutting and crushing part of the remaining columnar body in the next stage, and further detecting the movement to the position, the drive source supplies power to the drive device, and the drive device is rotated to operate the cutter blade. The remaining columnar pipe is cut and crushed to a size smaller than the design size, and the columnar body of the cut and crushed 5 is removed and removed during the next stage work so that there are no obstacles in the power. This is to ensure that the shield digging is performed smoothly.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the invention of this application will be described as embodiments of the present invention with reference to the drawings.
[0011]
In the embodiment shown in FIG. 1, reference numeral 1 denotes a system that forms the center of the gist of the invention of this application, which is divided into a portion in the ground and a ground portion in the ground. Drilling holes 2 are formed vertically or obliquely by drilling or boring, etc., and the sleeve pipe 3 of the outer tube as a columnar body formed by injection of a table packer or the like is left in a predetermined manner by the process. The cutter blade 4 for cutting and crushing the sleeve pipe 3 for injection of the table packer to a predetermined size is pivotally supported by the cutter holder via the pin 7 with respect to the drive device 5 provided immediately above the cutter blade 4. In addition, it faces the cutting and crushing portion of the sleeve pipe 3 as the columnar body, and is faced by a centrifugal force, or can be freely suspended.
[0012]
The drive device 5 can also employ the electric motor, hydraulic motor, compressed air motor, or the like. Depending on the design, the sleeve 5 may be inserted into the columnar body of the sleeve pipe 3 by a crane or the like (not shown). In order to relieve a shock due to a shock such as an impact on the pipe 3, a case where a guide made of rubber or the like is interposed may be considered.
[0013]
The drive device 5 is connected to a ground drive source 9 via a power transmission path as a guide by a crane or the like when being inserted into the hole 2 or a guide 8 as a cable. Is supplied with electric power, hydraulic pressure, compressed air or the like to the drive device 5, and an appropriate operation control device 10 is connected between the guide 8 and the power source 9. The operation control 10 is previously known to have 65% or less of the main power when the electricity from the power source 9 or the compressed air or the like is not operating while the cutter blade 4 is operating. Accordingly, the power supply state during operation or non-operation is stopped by detecting the power supply state during operation or non-operation and stopping the power to the drive device 5 from the drive source, that is, the cutter. Blade 4 It is adapted appropriately perform the stop operating onset that.
[0014]
Once the predetermined cutting and crushing of the columnar body with respect to the sleeve pipe 3 is completed, the drive device 5 and the cutter are connected to the upper columnar body in the drilling hole 2 through a predetermined stroke through a crane (not shown). The entire cutter blade 4 is lifted up through a holder so that it can face the cutting and crushing portion of the columnar body 3 at the next stage.
[0015]
Accordingly, the cutter blade 4 is rotated by a centrifugal force through the link during rotation of the driving device 5 and is lifted and contracted by a predetermined stroke, and the tip of the cutter blade 4 is a sleeve at the time of injection of the table packer. It is brought into close contact from the inside of the pipe 3 to give a predetermined cutting and crushing action, and the columnar sleeve pipe 3 is lifted so as to face a cutting and crushing portion of the next stage after predetermined cutting and crushing. is there.
[0016]
The cutting and crushing operation stop by the cutter blade 4 is automatically detected by detecting the power by the operation control 10, and the power supply from the drive source 9 to the drive device 5 is stopped, or predetermined by an elevating device such as a crane. The stroke cutter holder and the driving device 5 can be lifted and moved to the next stage.
[0017]
Therefore, the cutting and crushing action on the remaining columnar body with respect to the columnar sleeve pipe 3 can be automatically performed automatically after the system is inserted into the drilling hole 2.
[0018]
Therefore, if the length direction of the guide or the drive device 5 or the like disposed inside the guide is set to a predetermined length in the meantime, there is no complicated procedure for connecting unit lengths during operation. The predetermined work can be performed completely automatically and unattended.
[0019]
Of course, the embodiments of the invention of this application are not limited to the above-described embodiments. For example, a predetermined number of cutter blades are pivotally supported on the output shaft of a plurality of driving devices 5 so as to be swingable in the radial direction. Various modes such as being capable of pivoting can be adopted.
[0020]
The drive device is not limited to an electric motor, but can be an appropriate power motor such as a hydraulic motor or an air operated motor.
[0021]
The columnar body may be of any size as long as the drive device 5 and the cutter blade 4 are exposed, as well as the remaining sleeve pipe by injection of a double packer, and the material is made of synthetic resin. However, the present invention is not limited to metal and can be applied to any appropriate one.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a system of the invention of this application.
FIG. 2 is an enlarged side view of the cutting and crushing device in the ground.
[Explanation of symbols]
4 Cutter blade 3 Sleeve pipe 5 Drive device 8 Power transmission unit 10 Operation control device 9 Drive source

Claims (1)

A method of using a cutting device integrally comprising a cutter blade pivotally supported by a swing and a driving device for rotating the cutter blade,
Insert the entire cutting device into the pipe left in the ground,
The cutter blade is rotated by operating the driving device of the cutting device, and the cutter blade is swung by centrifugal force to reach the pipe cutting position.
Next, cut the pipe with the cutter blade.
The cutting method of the pipe left in the ground characterized by this.

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