JPS58113494A - 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 1 consisting of a hull structure that prevents earth and sand from collapsing
A push-out hole 4 through which the hume tube 2 passes is provided in the rear wall, and a plurality of propulsion jacks 3 are installed in the front wall to be interposed between the hume tube 2 and the hume tube 2 at the front end.

A blade 6 is fixed to the front and rear portions of the upper end of the cut-and-cut shield 1, and rollers 7 are rotatably attached to the lower portions of both ends of the beam 6. Each roller 7 is supported by a rail 8 installed on the ground.

The humid pipe 2 is buried in the following manner.

That is, the hump tube 2 buried in the cut-and-cut shield 1
is suspended and connected to the already buried fume pipe inside the cut-and-cut shield 1 by bolts, welding, etc., the propulsion jack is extended by 3t, and the cut-and-cut shield L is advanced while taking the reaction force with the fume pipe 2. let

When moving the cut-and-cut shield 1 forward, if the front part of the cut-and-cut shield L is not excavated, it will not move forward, so excavate it from the ground with a shovel 5 or the like in advance 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-cover shield l is, for example, U-shaped with an open top, as shown in FIG. Since excavation by the shovel 5 cannot be carried out in accordance with the U-shape accurately, it is necessary to support the excavation shield 1 from the ground. That is, as mentioned above, the cut-and-cut shield 1 is connected to the beam 6
It is supported by a rail 8 via a roller 7 attached to the rail 8. Thereby, even if the shovel 5 excavates too deeply than necessary, the excavation shield 1 is prevented from sinking before moving downward.

As trenchless shield 1 is advanced, trenchless shield 1
The space 9 created at the rear of the tunnel is filled in with earth and sand excavated at the front. In this way, the Huyum pipes 2 are successively buried underground.

When the forward movement of the cut-and-cut shield 1 for one piece of the Huyum tube 2 is completed, the Huyum tube 2 is newly suspended in one circle of the cut-and-cut shield,
It is connected to the hume pipe "2" which has already been buried. By repeating such operations, the burying of the hume pipe 2 is continued.

As mentioned above, since the front part of the cut-and-cut shield 1 is excavated in advance to form the groove 10, the cut-and-cut shield 1
There is no resistance to propulsion on the front side, and there is earth and sand 11 at the bottom that acts as resistance, so when the cut-and-cut shield l is propelled, the cut-and-cover shield l easily moves in the direction where there is no resistance. In other words, the cut-and-cut shield 1 becomes upwardly oriented, making it difficult to bury the humid tube 2 in a predetermined position.

Further, the excavation shield 1 has a hull structure, and receives the buoyancy of groundwater or earth and sand that accumulates in the excavation space (trench) 10, and for this reason, the buoyancy tends to rise as it moves forward. It may happen that it cannot be buried in the position.

Front space 10i1#! As shown in part A in Figure 2, the side wall collapses, posing a danger to the work, and the space 9 created at the rear poses a similar danger. Since the rear space 9□ is backfilled with excavated earth and sand or earth and sand prepared in advance as the cut-and-cover shield l moves forward, the degree of collapse of the side wall is likely to be less than in the front space 10, but there is a method in which the earth and sand are dropped from the ground. Now, Huyum's canal 2. There is a problem in that it is not possible to sufficiently backfill the bottom of the pipe with earth and sand, and the pipe 2 sinks over time.

The purpose of this xA-me is to provide a cut-and-cut shield device* that can eliminate the above-mentioned drawbacks.

An embodiment of the present invention will be described below with reference to Fig. 3 and Fig. 4. In both figures, the same reference numerals as in FIGS. 1 and 2 represent the same or equivalent items.

The cross-sectional shape of the lower part of the cut-and-cut shield l is an occluded circular shape with the upper part missing, and the cross-sectional shape of the upper part is almost rectangular, which is connected to the lower part. The width of the lower edge is set to be wider than the width of the upper edge. A lower partition wall 12 is fixed to the front lower part of the cut-and-cut shield 1, an upper partition l113 is fixed to the upper part, and a support member 14. 15 is fixed.

A turning ring 16 having a gear provided on a rotating part on the outer periphery is attached to the lower gap 1i12, and a support frame 18 of a lower cutter wheel 17 is fixed to the rotating part 1. The support frame 18 is provided with a hole 19 through which earth and sand excavated at its outer portion pass.

A pinion 21 is attached to the output shaft of a hydraulic motor 20 attached to the lower bulkhead 12 and meshed with a trout wheel provided on the rotating part of the swing ring 16. An inner cover 22 is attached between the inner peripheral part of the turning ring 16 and the middle part of the support frame 18 and the lower bulkhead 12. An outer cover 23 is attached between the lower and front parts. Between the middle part of the lower bulkhead 12 and the support member 14 on the central inner circumferential side of the inner cover 22, the excavated earth and sand is transported into the cut-and-cover shield 1 on the rear side of the lower bulkhead 12. A screw conveyor 24 is installed to move the vehicle, and a plurality of propulsion jacks 3 are installed between the lower bulkhead 12 and the support member 14. The outer cover 23 and the inner cover 22 are for preventing excavated earth and sand from entering the driving parts such as the pivot shaft 16 and pinion 21, and are in contact with the rotating shaft support 7L/~mu 18. A seal (not shown) is attached to the portion.

A housing 25 is fixed to the back side of the upper bulkhead 13, and is rotatable by bearings 2B and 29 attached to the center shaft 27 of the upper cutter wheel 26, the upper bulkhead 13, and the housing No. 25, respectively. Supported. central axis 2
A gear 30 fixed at 7 is housed in the housing 25, and this gear 30 meshes with a pinion 32 attached to the output shaft of a hydraulic motor 31. Hydraulic motor 31
is fixed to the outer wall of the housing 25.

The upper cutter foil 26 and the lower cutter foil 17 are arranged with a phase shift vertically and longitudinally, the diameter of the former 26 is smaller than the diameter of the latter 17, and the outer periphery of the former 26 protrudes from the ground. It has become. A cover 33 is attached to the upper end of the upper bulkhead 13 to prevent earth and sand excavated by the upper cutter foil 26 from climbing over the bulkhead 13 and entering the excavation shield l. The upper part covers the cutter boil 26.

An earth and sand pump 35, such as a concrete pump, is installed at the earth discharge port 34 of the screw conveyor 24.
A delivery pipe 36 is connected to the rear end of the pipe. The delivery pipes 36 are arranged at the upper and lower ends of the hume pipe 2.

Cut-and-cut seal F i (1) for burying the humid pipe 2
Promotion is performed as follows. That is, the humid pipe 2 to be buried is suspended in the excavated shield l,
Connect this to the existing humid pipe 2. Then, lower the front face of the cut-and-cover shield l to the cutter head.
Excavating with the upper cutter foil 26, filling the cutter chamber surrounded by the upper bulkhead 13, lower bulkhead 12 and cover 33 with the excavated earth and sand, and pressing the face with the earth and sand to prevent collapse 1s, the screw Excavated earth and sand are discharged by the conveyor 24.

While performing the above-mentioned excavation production, the reaction force is taken by the fume pipe 2, the propulsion jack 3 is extended, and the excavation shield 1 is advanced. Along with this, the extrusion hole 4 of the cut-and-cut shield 1 slides forward along the connected hume pipe 2. If you propel one Huyum tube, - propulsion jack 3
is shortened, and the hume pipe 2 is newly suspended in the excavation shield l and connected to the buried hume pipe, and the next excavation and excavation process is started. By repeating such operations, the hume tubes 2 are successively buried.

The excavated earth and sand discharged by the screw conveyor 24 is pumped by the earth and sand pump 35, and is sent out through the delivery pipe 36 into the space created at the rear as the excavation shield 1 moves forward, and fills the space. As a result, the humid pipe is buried underground at the same time as the cut-and-cut shield 1 moves forward.

According to the above 61.98L, the following effects can be obtained according to this invention.

(1) Since there is no need to previously excavate a trench in front of the trench shield, there is no danger of the side walls of the trench collapsing as in conventional methods, and the resistance of the face is equalized at the top and bottom, making it more difficult to use than conventional trench shields. Unlike the device, the cut-and-cut shield can be prevented from facing upward. It also prevents the cut-and-cover shield from pointing downwards by digging too much into the front space. Moreover, the support mechanism to prevent it from moving downwards is completely useless. Furthermore, since there is no space in front of the shield, there is no longer a problem with the conventional method in which the cut-and-cover shield is directed upward due to the buoyancy of underground water or earth and sand that collects in the front space.

(2) The excavated earth and sand is pumped by the earth-feeding pump, and the trailing space that is created as the cut-and-cover shield moves forward is immediately filled to every corner at the bottom, so there is no danger of the trailing trench collapsing, and the work can be carried out safely. Dance by doing something. In addition, the bottom of the humid pipe buried at the rear is also filled with excavated earth and sand, which prevents the buried humid pipe from sinking.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional cut-and-cut shield device, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 is a cross-sectional side view showing an embodiment of the present invention. The figure is a front view of FIG. 3. 1. Cut-and-cut shield, 2 @ Huyum tube, 3-.
Propulsion jack, 4@・Extrusion hole, 12・Lower bulkhead, 13・Upper bulkhead, 14・Support member, 15・Support member, 16・0 Swivel axis, 1
7. Lower cutter wheel, 18. Support frame, 20-@hydraulic motor, 21-. Pinion.

Claims (1)

[Scope of Claims] A cut-and-cut sheet filling 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) Reaction force applied to the hume tube by interposing it between the supporting member in the cut-and-cut shield and the forward-most hume tube. (C) A plurality of propellers that are rotatably supported by a partition wall provided at the front of the excavation shield and rotated by a drive device to excavate the front face of the excavation shield. (d) A pressure-feeding means for compressing and filling excavated soil into the space formed with the rear guard as the excavation shield is propelled;