JPH042236Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention is an improved construction method for constructing tunnels by press-fitting hume pipes into the ground while sequentially connecting them via bladders, and driving the excavation underground. It provides a bladder with a

Prior Art The outline of the above method is disclosed in Japanese Patent Application Laid-Open No. 3796 of 1981. First, the cutting edge is pushed forward into the ground from the side of the shaft, and the cutting edge is pushed forward to excavate it to a predetermined position. After that, the hume tube is connected so as to be pushed forward through the bladder, and high-pressure fluid is injected into the bladder to advance the cutting edge by the amount of expansion of the bladder, and then the high-pressure fluid is discharged from the bladder to deflate it. After enabling the Huyum canal, press the Huyum canal, move the Huyum canal forward by the amount that the bladder contracts, and repeat this process.After the blade mouth and the Huyum canal are propelled to a predetermined position, insert a separately prepared bladder into the Huyum canal. The following Huyume pipe is connected in the above state through the blade, and the cutting edge, the Huyum pipe, and the following Huyum pipe are propelled again in the above-described manner, and after being propelled to a predetermined position, the blade is further propelled through the bladder. Then, the next succeeding hume tube is connected in the above state, and high-pressure fluid is repeatedly injected and discharged from the bladder to propel the cutting edge and the hume tube, thus constructing a tunnel with the hume tubes connected through the bladder. This is a construction method based on the concept.

The diameter of the cutting edge and humid pipe used in this method is:
Each construction site has a different design, and therefore, conventionally, the bladders used for this purpose had to be prepared to match the diameter of the cutting edge and the humid pipe.

Problems to be Solved by the Invention The present invention aims to eliminate this inconvenience and provide a bladder that can be adapted to cutting edges and hume tubes with a certain degree of diameter difference.

The basis for this idea is that if you draw several circles with somewhat different diameters and divide the circumference of each circle into equal parts, you can create an arc (curve) that divides each circle into equal parts depending on the method of equal division. ) is not much different from the curve of an arc for circles with different diameters. Therefore, an arc created by dividing a circle of a certain diameter into equal parts, even if the diameter is slightly larger than that circle, Even if the arc is placed on the circumference of a circle with a large diameter with an opening, the arc can be placed so as to almost match the circumference of the circle with a large diameter. This idea was devised because it is possible to approximately match the circumference of a circle with a relatively large diameter.

Means for solving the problem The arc shape is obtained by dividing the circumference of a circle with a certain diameter into several equal parts, and one of the parts is filled with water from the compressed fluid supply device. Equipped with a control valve mounting part 2 and a compressed fluid distribution port 3 for taking compressed fluid in and out,
The other is a bladder 1 having a compressed fluid distribution port 3 that can be connected to another compressed fluid distribution port 3.

Function As mentioned above, the bladder 1 of the present invention is formed into an arc shape by dividing what would normally be an annular bladder. , the bladders having the above configuration are connected in series and arranged to form an annular shape on the end surface of the cutting edge and the hume tube 4, but the diameter of the cutting edge and the hume tube 4 is such that the diameters of the blade edge and the hume tube 4 connect the arc-shaped bladders in a series. If the diameter is larger than the annular diameter formed by
The blade opening can be placed on the end surface of the Huum canal 4 with a gap in between, or the blade opening can be arranged to approximate the annular shape of the Huum canal, or an arc-shaped bladder prepared as a spare can be incorporated into the blade opening, It can be interposed between the cutting edge and the hume tube so as to form a shape close to the annular shape of the end surface of the hume tube 4.

Embodiment A collar 5 is attached to the cutting edge and one end of the outer periphery of the hume tube 4. There are two types of collar: one that is fixed to the blade mouth and the humid tube 4, and the other that is detachable. Furthermore, a collar sliding surface 6 is formed at the other end of the hume tube 4. Therefore, in the continuity of the cutting edge and the hume tube, the collar sliding surface of the succeeding hume tube fits inside the collar of the cutting edge. In the following hume tube, the collar of the previous hume tube and the collar sliding surface of the rear hume tube are fitted in the above-described state to be continuous.

Although not shown, a waterproof gasket is usually inserted between the inside of the collar attached to the cutting edge, the hume tube, and the sliding surface of the collar provided on the hume tube.

This collar and the collar sliding surface perform the function of maintaining the excavation propulsion directionality of the cutting edge and the humid pipe.
It also functions to prevent the bladder interposed between the humeral canals from protruding when it expands or contracts.

The arc-shaped bladder is interposed between the cutting edge and the humid tube in accordance with the excavation of the cutting edge and the humming tube in the above-described state so as to match or approximate the annular shape of the cutting edge and the humid tube. In one of them, the compressed fluid supply device and the control valve mounting portion 2 are connected through a pipe 7. Further, the compressed fluid distribution port 3 of this arc-shaped bladder 1 and other bladders 1 are connected by a pipe 7.

Compressed fluid is pressurized into and discharged from the combined arc-shaped bladder in a conventional manner.

Furthermore, since the aforementioned collars are arranged on the cutting edge and the hume tube, the waterproof function will not be impaired even if the isolated bladders are placed at intervals.

Effects When using the present invention, even when the diameters of the cutting edge and the Huum's canal are different in size, it is not necessary to prepare a bladder that matches the diameter of the cutting edge and the Huum's canal, just by operating the combination of arcuate bladders. It can also be adapted to cutting edges and hume pipes with a certain degree of diameter difference.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the bladder interposed between the humeral canals, and FIG. 2 is an explanatory diagram of the arrangement of the bladder of the present invention. 1 is the bladder of the present invention, 2 is the control valve mounting part, 3
4 is the compressed fluid distribution port, 4 is the cutting port, and the humid pipe.

Claims (1)

[Scope of utility model registration request] It is formed into an arc shape obtained by dividing the circumference of a circle with a certain diameter into equal parts, and one of the arcs is equipped with a control valve for inputting and outputting the compressed fluid from the compressed fluid supply device. The bladder is provided with a portion 2 and a compressed fluid distribution port 3, and the other portion constitutes a compressed fluid distribution port 3 that can be connected to another compressed fluid distribution port 3.