JPS5847896A - Drive shielding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an open-cut shield device for sequentially burying humid pipes underground.

Next, a conventional cut-and-cut shield device will be explained with reference to FIGS. 1 and 2.

Cut-and-cut shield consisting of a hull structure that prevents earth and sand from collapsing
The rear wall is provided with an extrusion hole 4 through which the hume tube 2 passes, and the front wall is provided with a plurality of propulsion jacks 3 interposed between the hume tube 2 at the front end.

There are beams 6 at the front and rear of the upper end of the open-cut seal)
is fixed to the ladle, and rollers 7 are installed at the bottom of both ends of the beam 6.
is installed rotatably. Each roller 7 is supported by a rail 8 installed on the ground.

The humid pipe 2 is buried in the following manner.

In other words, Huyum tube 2 buried in the cut-and-cover shield l
is suspended and connected to the already buried hump pipe inside the cut-and-cut shield l by bolts, welding, etc., the propulsion jack 3 is extended, and the cut-and-cut jack 11 is suspended while the fume pipe 2 takes the reaction force. Advance l.

When moving the cut-and-cut shield 1 forward, it cannot move forward unless the front part of the cut-and-cut shield 1 is excavated, so excavation is performed from the ground in advance with a shovel 5 or the like to create a groove (space) in which the cut-and-cover shield 1 can move forward. Form 10.

The cross-sectional shape of the cut-and-cut shield l is, for example, U-shaped with an open top, as shown in diagram WXz. shovel 5
Since excavation cannot be carried out in accordance with the U-shape accurately, it is necessary to support the excavation shield 1 from the ground η). That is, as described above, the cut-and-cut shield 1 is supported by the rail 8 via the roller 7 attached to the beam 6. This prevents the excavation shield l from sinking downward even if the shovel 5 excavates deeper than necessary.

As the cut-and-cut shield l is advanced, the cut-and-cut shield l
The space 9 created at the rear of the tunnel is filled in with the earth and sand excavated in the front. In this way, the Huyum pipes 2 are successively buried underground.

When the forward movement of the cut-and-cut shield l for one piece of the hume tube 2 is completed, the hume tube 2 is newly suspended inside the cut-and-cut shield l,
Connect it to the hume pipe 2 that has already been buried. By repeating such operations, the embedding of the hume tube 2 is continued.

As mentioned above, the front part of the cut-and-cut shield l is excavated in advance and extends into the groove 10, so the cut-and-cut shield l
There is no resistance to propulsion in front of the shield 1, and there is earth and sand 11 at the bottom of the shield 1, which acts as resistance, so when the cut-and-cover shield l is propelled, the cut-and-cover shield l tends to move in the direction where there is no resistance. That is, the cut-and-cut shield 1 was oriented upward, making it difficult to bury the humid tube 2 in a predetermined position.

Furthermore, even if the excavated groove 10 in front of the cut-and-cover shield 1 is excavated in accordance with the cross-sectional shape of the cut-and-cover shield l, there is no earth retaining on the side wall portion of the excavated groove 10, so Ag in the ailZ diagram is
The side wall portions often collapse as shown in FIG.

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 3 and 4. In both figures, the same reference numerals as in Figure wL1 and Figure 2 represent the same or equivalent elements.

A lower glass partition 12 is installed at the lower front part of the cut-and-cut shield l.
is fixed, the upper shell partition 22 is fixed to the upper shell part, and the support member 30, 31 is fixed to the intermediate part. A turning ring 13 having a gear on a rotating part on the outer periphery is attached to the lower partition wall 12, and a support frame 14 of a lower cutter wheel 15 is fixed to the rotating part. The support frame 14 is provided with holes 20 through which the earth and sand are excavated in its outer part.

A pinion 17 is attached to the output shaft of a hydraulic motor 16 attached to the lower shell bulkhead 12 and meshed with a gear provided on a rotating portion of the swing ring 13. An inner cover 19 is attached between the inner peripheral part of the turning ring 13 and the middle part of the support frame 14 and the bottom partition wall 12. An outer cover 18 is attached between the lower front part and the front part. Between the intermediate part of the lower partition wall 2 and the support member 30 at the central inner circumference of the inner cover, excavated soil is applied to the lower partition wall 12.
A screw conveyor 21 is installed to transport the inside of the cut-and-cover shield 1 on the rear side of the bulkhead 1.
A plurality of propulsion jacks 3 are installed between the propeller 2 and the support member 30. The outer cover 18 and the inner cover 19 are used to prevent excavated soil from entering drive parts such as the swing ring 13 and pinion 17, and a seal ( (not shown) is installed.

A housing 25 is fixed to the back side of the upper partition wall 22, and the central axis 23 of the upper cutter wheel 24 is connected to the bearing 2 attached to the upper partition wall 22 and the housing 25, respectively.
It is rotatably supported by 6.27. Central axis 23
A gear 28 fixed to the housing 25 is housed in the housing 25, and the gear 28 meshes with a pinion 32 attached to the output shaft of the hydraulic motor 29. The hydraulic motor 29 is fixed to the outer wall of the housing 25.

The upper cutter foil 24 and the lower cutter foil 15 are arranged with their phases shifted vertically and front and back,
The outer periphery of the upper cutter foil 24 is designed to protrude from the ground.

The promotion of the cut-and-cover shield 1 for burying the humid pipe 2 is carried out as follows. That is, the fume pipe 2 to be buried in the excavated shield l is suspended, connected to the existing hume pipe 2, and the propulsion jack 3 is extended.
While absorbing the reaction force with Huyume tube 2, the cut-and-cut shield l
advance. Along with its advance, cut-and-cover shield 1
The front face is excavated with the lower cutter foil 15 and the upper cutter foil 24, and the excavated earth and sand are transferred to the screw conveyor 21.
It is discharged by While the excavation shield l is propelled by the propulsion jack 3, the lower cutter foil 15 and the upper cutter foil 24 are used to excavate the material, so that the double-sided vine foil 1
5.24 is in close contact with the face. The front face of the cut-and-cut shield l does not have a space like the conventional one, and resistance from the lower and upper faces is applied via the lower cutter foil 15 and the upper cutter foil 24, unlike the conventional cut-and-cut shield. There is no extreme resistance imbalance as in , and the upward orientation of the cut-and-cut shield l is eliminated.

In addition, since there is no space in the front face of the cut-and-cover shield l, the phenomenon of side collapse A as in the conventional case is eliminated. Use to fill.

In the embodiment described above, one cutter foil is provided on each of the upper and lower sides, but more than two cutter foils may be installed in combination. Accordingly, the following effects can be obtained.

Since the upper and lower plurality of cutter foils on the front side of the trench shield l are in close contact with the face, the propulsion resistance on the front surface of the trench shield l is uniform, so that the trench shield 1
is no longer propelled upward or downward, and the excavation shield l is pushed forward by the pushing jack 3
Directional control is also easy. Moreover, since there is no excavation groove like the conventional one on the front side of the cut-and-cut shield l, there is no collapse of the groove, and safety can be ensured.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view showing a conventional trenchless shield device, and Figure 2 is #! 1 is a cross-sectional view taken along the line n-I in FIG. 1, FIG. 3 is a cross-sectional side view showing one embodiment of the present invention, and FIG. 4 is a front view of FIG. 1- Cut-and-cut shield, 2... Huyum tube, 3...
Propulsion jack, 4. Extrusion hole, 12. Lower bulkhead, 13. Swivel ring, 14. Support frame, 15. Lower cutter foil, 16.
・Hydraulic motor, 17.-pinion, 18..lower cover, 19..inner cover, 20.-hole,
21...Screw conveyor, 22@-Upper bulkhead, 23...Center shaft, 24@-Upper cutter foil, 25...Housing, 26...Bearing,
27.e bearing, 28@reduction gear, 29..hydraulic motor, 30..supporting member, 31..supporting member, 32..pinion (9) 46.

Claims (1)

[Claims] A -m shielding device comprising the following (a) to (d), (
a) Cut-and-cut shield of the hull structure with a hole in the rear wall for extrusion through which the hume tube passes; (b) A cut-and-cut shield that is interposed between the supporting member in the cut-and-cut shield and the hume tube at the forefront end to apply a reaction force to the hume tube. A propulsion jack that propels the cut-and-cut shield, (C) is rotatably supported by a partition wall provided at the front of the III-cut shield with a phase shift in the front and back and up and down, and is rotated by a drive device to propel the cut-and-cut shield. a plurality of cutter foils for excavating the face of the section; (d) a conveying device for transporting the earth and sand agitated by the plurality of cutter foils to the rear interior divided by the section'wall;