JP2005213784A - Emergency clogging device in cutting face collapse in open pipe jacking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure safety by quickly interrupting the collapsed soil and sand of a cutting face during the discharge working of excavated soil and sand or in excavation stoppage. <P>SOLUTION: An emergency clogging device is provided with a laterally turning roller 3 upward and downward of an opening 1b of a cutting edge pipe 1, and an upward and downward guide rail 4 inside both-side walls of the cutting edge pipe 1, respectively, and lowers to clog them while holding both the ends by the guide rail 4 after pulling a shutter 2 forward from inner-upward of the cutting edge pipe 1 to be turned by the upper side turning roller 3. The device is provided with an opening and closing jack 6 for pulling and clogging the lower end of the shutter 2 in the cutting edge pipe downward, and a winch 5 pulling rearward and opening the upper end of the shutter 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for blocking the inflow of collapsible sediment at the face during excavation sediment removal work or during excavation suspension in open type propulsion work.

  Conventionally, when a relatively short distance is excavated by a tunnel method or a propulsion method, an open-type human-powered excavation method is often employed even today. This is because the use of a sealed shield machine is disadvantageous in terms of economy, and a large equipment yard is required, making it difficult to secure a starting base. In that case, it is common to improve the strength of the ground by improving the ground or injecting a chemical solution at the top, side, bottom, or all the steps of the tunnel excavation cross section, and excavating with securing water stoppage. Such an auxiliary construction method that improves the independence of the natural ground is started in combination, but due to the problem of ensuring the quality of the chemical injection method and the ground improvement method, the selection of the optimal injection material and injection method for the ground There are cases where it is difficult to exert an effect on changes in soil soil conditions.

Such unstable manpower excavation work that is self-supporting is always exposed to the risk of collapse, and there is a risk of collapse of the face, spillage of sediment into the mine, depression of the ground surface, and personal accidents in the mine. For this reason, when the possibility of collapse is detected, it is necessary to install an immediate earth retaining work to close the face and to prevent collapse to a minimum. Generally, a sandbag is installed in advance near the face or a retaining plate is installed, and when there is a sign of collapse, the work is stopped and the face is closed. On the other hand, there is a bladed tube with an open door type steel earth retaining door, but in such a system, it is necessary to retreat discharge equipment such as a backhoe greatly at the time of closing to secure an opening and closing space, It will not be in time for landslides.
Japanese Utility Model Publication No. 7-38295

  The problem to be solved by the present invention is to solve these problems of the prior art, and open type that can ensure safety by quickly shutting off the collapsible sediment of the face during excavation sediment discharge work or during excavation suspension The purpose is to provide an emergency closing device at the time of collapse of the face in propulsion work.

The configuration of the present invention that solves this problem is as follows.
1) A propelling tube is connected to the rear end of the blade tube and pushed forward into the ground. The face and sand excavated by the blade is discharged backward through the propelling tube, and the propelling tube is added to the tail and pushed further. In a device that blocks the collapsed earth and sand in the open-ended propulsion work that constructs a pipeline by moving it inside the blade tube of the face part, a slide-type shutter that can be bent is provided at the tip opening of the blade tube. Emergency closing device 2 when the face collapses in open-type propulsion work, which is provided so that it can be opened and closed freely, and the shutter can block the collapsible sediment 2) The opening can be closed by lowering the shutter from above The emergency closing device at the time of collapse of the face in the open type propulsion construction described in the above 1) 3) The above described 2) in which the shutter is retracted along the ceiling wall surface of the blade tube and lowered from the tip so that it can be closed. Open type 4) Emergency closing device at the time of face collapse in advance work 4) A horizontal turning roller is provided above the opening of the blade tube, vertical guide rails are provided on both inner walls of the blade tube, and a shutter is installed in the blade tube. After pulling forward from above and turning with the turning roller, both ends are lowered while being held by the guide rail so that they can be closed and closed when the face is collapsed in the open type propulsion construction described in 2) or 3) Emergency closure device 5) When the face collapses in the open type propulsion work described in any one of 2) to 4) above, wherein wires are bound to the upper and lower ends of the shutter, and jacks or winches are provided to pull and open the wires. 6) The emergency closing device at the time of collapse of the face in the open type propulsion work according to any one of 1) to 5) above, wherein the excavating earth and sand discharging device is arranged in the internal space of the blade tube. A.

  According to the present invention, since the blade opening is closed with a slide-type shutter, it is not necessary to secure an opening / closing space as compared with a conventional hinged door, and without retreating a discharge device such as a backhoe. It can be quickly closed to prevent the inflow of collapsing earth and sand at an early stage, thereby ensuring the safety of workers. In addition, the swing door type retaining door requires a large rigidity that can counteract the earth pressure and water pressure of the inflow earth and sand, and it is extremely difficult to perform an urgent closing operation, but in the present invention, it is operated in a direction substantially perpendicular to the earth pressure and water pressure. The closing operation can be performed easily and quickly with a small force.

  The shutter of the present invention can be pulled out from above, below, or in the left-right direction so as to close the opening. In particular, when lowering from above, if the structure is such that the shutter is pulled out from the upper part of the blade tube and turned by the horizontal turning roller and then lowered while being held by the guide rails, This is preferable because the discharge device can be quickly closed without greatly retreating and the strength at the time of closing is high. A jack or winch is used to open and close the shutter, and in particular, a device that operates quickly is used for closing. Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is an explanatory view of an open type propulsion work of the embodiment, FIG. 2 is a front view of the blade tube of the embodiment, FIG. 3 is an explanatory view of the blade tube at the time of excavation of the embodiment, and FIG. It is explanatory drawing which shows interruption | blocking of earth and sand.

  In the figure, 1 is a blade tube, 1a is a blade, 1b is an opening, 1c is a lubricant injection port, 2 is a shutter, 2a is a connector, 2b is a wire, 3 is a turning roller, 4 is a guide rail, 5 Is a winch, 6 is an open / close jack, 6a is a strut, 7 is a directional jack, 8 is a propulsion pipe, 9 is a backhoe, 10 is a conveyor, 11 is an exhaust duct, 12 is a pushing device, 12a is a stand, 12b is a wheel, 13 Is a toro bucket, 14 is a blower for ventilation, 15 is a dump truck, 16 is a lubricant plant, 17 is a thrust reduction device plant, 18 is a mobile crane, D is excavated sediment, G is decayed sediment, K is face, S is The sliding material layer, T, is a starting shaft.

  The cutting edge tube 1 of the present embodiment is provided with a lateral turning roller 3 above and below the opening 1b, and a guide rail 4 having a U-shaped cross section on the inner side walls of the opening 1b. A winch 5 is attached to the upper rear, and an open / close jack 6 is attached to the lower part on both sides of the pipe. The shutter 2 is a flexible material that can be wound, such as a strong cloth or wire mesh. The wire 2b is attached to the upper and lower ends by a connector 2a, and each wire 2b is connected to a winch 5 and an open / close jack via a turning roller 3. 6 is connected to each.

  In this embodiment, as shown in FIG. 1, the pushing device 12 is installed behind the bottom of the starting shaft T, and the blade edge tube 1 of the present invention in which the backhoe 9 is disposed in the tube is placed on the mount 12a. The propulsion tube 8 is connected to the end, and the pusher wheel 12b is brought into contact with the rear side and pushed forward into the ground. At the same time, the lubricant is supplied by the lubricant plant 16 and the thrust reducing device 17 and injected between the natural ground and the blade tube 1 and the propelling tube 8 to smoothly promote the friction with the natural ground. . The shutter 2 of the blade tube 1 is opened by a winch 5 that is pulled upward and rearward.

  Next, the conveyor 10 is disposed in the blade tube 1 and the tube 8 propelled in the ground, the excavated sediment D of the face K excavated by the blade port 1a is taken in by the backhoe 9, and is conveyed to the starting shaft T by the conveyor 10. . The transported excavated earth and sand D is transported to a dump truck 15 on the ground surface by a toro bucket 13 and transported to a predetermined place. A pipe having a predetermined length is constructed in the ground while continuing this process and adding the propulsion pipe 8.

  Here, the independence of the natural ground is unstable, and the face K may collapse during excavation work or when excavation is stopped. At that time, as shown in FIG. 4, the boom of the backhoe 9 is folded and the conveyor 10 is slightly retracted, and the shutter 2 is pulled by the opening / closing jack 6. The shutter 2 descends while being held by the left and right guide rails 4 to close the opening 1b, and the collapsing earth and sand G that is about to flow in is blocked.

  Since the present embodiment is configured in this way, the sliding shutter is lowered from above to close the opening 1b. Therefore, it is not necessary to secure an open / close space as compared with a conventional door-type earth retaining door. 9 was closed quickly without retreating each time, and the inflow of the collapsed earth and sand G was interrupted early, and the safety of the workers could be ensured. In addition, the swing door type retaining door requires a large rigidity that can resist the earth pressure / water pressure of the inflow earth and sand and it is extremely difficult to perform an urgent closing work. Therefore, it was possible to perform the closing operation easily and quickly with a small force.

  The emergency closing device at the time of collapse of the face in the open type propulsion work of the present invention can be applied to the construction of a small-diameter to large-diameter pipe rod.

It is explanatory drawing of the open type promotion construction of an Example. It is a front view of the blade mouth tube of an Example. It is explanatory drawing of the blade mouth tube at the time of excavation of an Example. It is explanatory drawing which shows interruption | blocking of the collapsed earth and sand of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting edge pipe 1a Cutting edge 1b Opening part 1c Lubricant injection port 2 Shutter 2a Connection tool 2b Wire 3 Turning roller 4 Guide rail 5 Winch 6 Opening / closing jack 7 Direction jack 8 Propulsion pipe 9 Backhoe 10 Conveyor 11 Exhaust duct 12 Pushing device 12a Mounting base 12b Wheel 13 Troto bucket 14 Ventilation blower 15 Dump truck 16 Lubricant plant 17 Thrust reduction plant 18 Mobile crane D Excavated sediment G Collapsed sediment K Face S S Lubricant layer T Starting shaft

Claims (6)

  A propulsion pipe is connected to the rear end of the blade mouth pipe and pushed forward into the ground. The face and sand excavated by the blade edge is discharged through the propulsion pipe to the rear, and the propulsion pipe is added to the tail and pushed further. In the open type propulsion work that constructs the pipe line, the sliding shutter that can be bent at the tip opening of the blade tube can be opened and closed freely in the device that blocks the collapsed sediment when the ground collapses in the blade tube of the face portion The emergency closing device at the time of face collapse in open-type propulsion work, which is installed in the system and is capable of blocking collapsed sediment with the same shutter.   The emergency closing device at the time of face collapse in open type propulsion work according to claim 1, wherein the shutter can be lowered from above to close the opening.   The emergency closing device at the time of collapsing the face in the open type propulsion work according to claim 2, wherein the shutter is stored in a deployed state along the ceiling wall surface of the blade tube and can be closed by being lowered from the tip.   A horizontal turning roller is provided above the opening of the blade tube, vertical guide rails are provided on both inner side walls of the blade tube, and the shutter is pulled forward from the inside of the blade tube and turned by the turning roller. The emergency closing device at the time of collapse of the face in the open type propulsion work according to claim 2 or 3, wherein both ends are lowered while being held by the guide rail so as to be closed.   The emergency closing device at the time of collapsing the face in the open type propulsion work according to any one of claims 2 to 4, wherein a wire or a winch is provided for binding the wire to the upper and lower ends of the shutter and pulling and opening the wire.   The emergency closing device at the time of face collapse in open type propulsion work according to any one of claims 1 to 5, wherein a device for discharging excavated earth and sand is disposed in the internal space of the blade tube.

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