JP4098296B2 - Open shield machine and open shield method using it - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an open shield machine for constructing underground structures such as water and sewage systems, common ditches, telegraph / telephone, and other underground structures, and an open shield method using the open shield machine.

  The open shield method is a highly rational method that utilizes the advantages of the open cut method (open cut method) and the shield method. 2 schematically shows an open shield machine, which is a shield machine having front, rear, and top surfaces each including left and right side wall plates 1a and a bottom plate 1b connected to the side wall plates 1a. is there.

  In this open shield machine 1, the front ends of the side wall plate 1a and the bottom plate 1b are formed as blade edges 11, and the propulsion jacks 2 are arranged in the vertical direction in the center or near the rear end of the side wall plate 1a. In the figure, 3 indicates a partition wall.

  The open shield method to be constructed using such an open shield machine 1 is not shown in the figure, but this open shield machine 1 is installed in the start pit, and the propulsion jack 2 of the open shield machine 1 is extended so that the The open shield machine 1 is moved forward with the reaction force against the reaction wall, the first concrete box 4 forming the underground structure is suspended from above, and the propulsion is shrunk in the tail portion 1c of the open shield machine 1 Set behind jack 2. A strut is disposed between the propulsion jack 2 and the reaction wall to adjust the distance appropriately.

  In addition, the start pit is made up of a retaining wall, and in order to start the open shield machine 1, a part of this retaining wall is mirror-cut. If necessary, the ground is improved at the front part of the starting pit by chemical injection or the like. Sometimes it is left.

  Excavator 9 such as an excavator excavates and removes soil from the front or top surface of open shield machine 1. At the same time as or after this earth removal step, the propulsion jack 2 is extended to advance the open shield machine 1. In the case of this forward process, a pushing angle 8 made of a frame made of box steel or mold steel is arranged in front of the concrete box 4, and the open shield machine 1 receives a reaction force from the concrete box 4 set rearward. Take.

  Then, the second concrete box 4 is suspended in the tail part 1 c of the open shield machine 1 in front of the first concrete box 4. Thereafter, the same soil removal process, advance process, and setting process of the concrete box 4 are repeated as appropriate, and the concrete boxes 4 are sequentially left in the ground in line with the advancement of the open shield machine 1, and further this concrete box. Put backfill 5 on the upper surface of 4.

  When the concrete box 4 is suspended in the tail part 1c of the open shield machine 1, a height adjusting material 7 such as a concrete block is disposed under the concrete box 4, and the concrete part 4 is placed in the tail part 1c. The grout material 6 is filled in the left and right and lower spaces of the box 4.

  In this way, if the open shield machine 1 reaches the reaching mine, it is removed and the construction is completed.

  In such an open shield construction method, as described above, the concrete box 4 is left in the ground in a column as the open shield machine 1 advances, and the concrete box 4 is suspended in the tail portion 1c of the open shield machine 1. As the open shield machine 1 moves forward, it leaves the tail portion 1c and remains in the ground. The open shield machine 1 takes a reaction force on the concrete box 4 left in the ground in this way. Advance.

  The concrete box 4 is made of reinforced concrete. As shown in FIG. 3, the concrete box 4 is an integrated body composed of a left side plate 4 a, a right side plate 4 b, an upper floor plate 4 c and a lower floor plate 4 d, and the front and rear surfaces are opened as openings 10.

  The prior art is generally performed by those skilled in the art, and is not related to a known invention.

  In the burying of the concrete box 4 by such an open shield construction method, after leaving it in the ground at the tail part of the open shield machine, the backfill is put on this as described above. In this case, for example, a dump truck or the like It is carried in with a vehicle and the backfill is put on the concrete box, and then the surface is spread and leveled with a heavy machine such as a bulldozer.

  For this reason, the type and number of machines to be carried into the construction site increase, which may hinder the progress of work, and the timing for putting backfill soil into the concrete box left in the ground is planned. Work may not be performed smoothly.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and automatically put back soil on the concrete box left in the ground at the tail part of the open shield machine as the open shield machine advances. The object of the present invention is to provide an open shield machine that can be thrown in and that can automatically spread and improve workability, and an open shield method using the open shield machine.

In order to achieve the above-mentioned object, the invention according to claim 1 is an open shield machine comprising a step of excavating and discharging earth and sand in front of the front or top opening of the open shield machine with an excavator, and a propulsion jack. The process of extending the shield machine with the reaction force of the concrete box by stretching and the process of setting a new concrete box behind the propulsion jack shrunk in the tail part of the shield machine is repeated as appropriate. In the open shield machine used in the open shield construction method, in which backfill soil is put on the concrete box, the rear shield plate and the lateral soil plate are attached to the tail part of the open shield machine. part spread leveling provided facilities refilling soil to ground level at the top of, the spread leveling equipment of Mododo embedding constituting a frame of the flat U-shaped It is an Abstract that constituted by paying frame and leveling bar Mododo embedding discharged from mounted the receiving frame to the rear end of the housing frame.

  According to the first aspect of the present invention, the backfill soil can be spread and leveled on the concrete box left in the ground with the leveling equipment attached to the open shield machine. It is not necessary to carry in and use a bulldozer for the construction, and the construction equipment can be made compact as a whole.

The invention according to claim 2 is an open shield construction method in which an excavator excavates and removes soil in front of the front or top opening of the open shield machine, and the propulsion jack is extended to make the concrete box a reaction force. The process of advancing the shield machine and the process of setting a new concrete box behind the propulsion jack shrunk in the tail part of the shield machine are repeated as appropriate, and the concrete boxes are successively embedded in tandem. In the open shield method of putting backfill on top, the rear shield plate and the lateral soil plate are attached to the tail part of the open shield machine, and a plane U-shaped frame is attached to the ground level above the tail part. laying leveling of embedding constituted by accommodating frame of the configuration for implantation Mododo and leveling bar Mododo embedding discharged from the storage frame attached to a rear end of the housing frame Mododo The Bei provided, along with the advancement of the open shield machine, the Mododo embedding flows spilling from housing frame, it is an Abstract that leveled laying in leveling bar is moved forward by the forward open shield machine.

  According to the second aspect of the present invention, when the open shield machine moves forward, the backfill is automatically put on the concrete box left in the ground following this, and further automatically. The floor is smoothed. Therefore, since the advancement of the open shield machine, the laying of the concrete box, and the input / laying of the backfill soil are automatically performed in cooperation, the workability is improved.

  The open shield machine according to the present invention and the open shield method using the open shield machine, when throwing back soil on the concrete box left in the ground at the tail part of the open shield machine, Not only can the automatic installation with the equipment attached to the open shield machine, and the automatic leveling can be done automatically, but it is also possible to improve the workability by eliminating the need to use a machine such as a bulldozer. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view showing an embodiment of the main part of the open shield method of the present invention and the open shield machine used therefor. Since the basic configuration of the open shield machine and the open shield machine is the same as that of the prior art, Detailed description is omitted.

  In particular, the present invention relates to a method for leveling backfill soil 5 that is placed on a concrete box 4 left in the tail portion of the open shield machine 1 and spreads, and the open shield machine 1 is used as equipment for that purpose. The leveling equipment 13 is provided on the top of the tail part 1c.

  The spread leveling equipment 13 is disposed at the ground level, and is provided at the storage portion 14 of the backfill 5 constituted by a planar U-shaped frame body 14c and the rear end of the storage portion 14. It consists of a leveling bar 15 arranged at the ground level.

  The storage portion 14 includes an inclined plate 14a that descends toward the rear inside the frame body, and a discharge port 14b for the backfill soil 5 is open below.

  Further, the spread leveling bar 15 uses, for example, H-shaped steel and is fixed to the rear end of the frame body 14c.

  In the figure, 16 is a rear retaining plate attached to the tail portion 1c, and 17 is a lateral retaining plate.

  Next, a method for refilling the earth and sand on the concrete box 4 left in the ground in the tail portion 1c using the spread leveling equipment 13 will be described. In this state, the upper part of the concrete box 4 installed and left in the ground is open.

  In this state, if the backfill 5 is carried into the input place by a vehicle 18 such as a dump truck and dropped onto the inclined plate 14a inside the frame body 14c of the storage unit 14 of the leveling equipment 13, the backfill is performed. The soil 5 slides down along the inclined plate 14a, and is automatically charged above the concrete box 4 below from the discharge port 14b.

  At this time, since the front and sides of the concrete box 4 are surrounded by the rear earth retaining plate 16 and the side earth retaining plate 17, the back-filled soil thrown on the concrete box 4 is scattered around. There is no.

  If the open shield machine 1 is advanced while the backfill 5 is put into the storage portion 14 in this way, the backfill 5 is automatically placed on the concrete box 4 in the front that is left behind in the ground. And the leveling bar 15 attached integrally therewith moves forward as the open shield machine 1 moves forward. Since the leveling bar 15 moves at the ground level, the upper surface of the backfill 5 previously put on the concrete box 4 is scraped and leveled by the leveling bar 15 and leveled at the ground level. Become.

  The concrete box left behind in the ground following the advance of the open shield machine 1 simply by putting the backfill 5 into the storage section 14 of the leveling equipment 13 attached to the open shield machine 1 as described above. The backfill 5 can be automatically spread on the body 4 and leveled.

It is a vertical side view which shows embodiment of the open shield machine of this invention and the open shield construction method using this. It is a vertical side view which shows the outline of an open shield construction method. It is a perspective view of a concrete box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Open shield machine 1a Side wall plate 1b Bottom plate 1c Tail part 2 Propulsion jack 3 Bulkhead 4 Concrete box 4a Left side plate 4b Right side plate 4c Upper floor plate 4d Lower floor plate 5 Backfill soil 6 Grout material 7 Height adjustment material 8 Pushing angle 9 Excavator DESCRIPTION OF SYMBOLS 10 Opening 11 Blade edge 13 Spreading leveling equipment 14 Storage part 14a Inclined plate 14b Discharge port 14c Frame 15 Spreading level bar 16 Rear earth retaining plate 17 Side earth retaining plate

Claims (2)

The process of excavating and discharging the earth and sand in front of the front or top opening of the open shield machine with the excavator, the process of extending the propulsion jack and moving the shield machine forward with the reaction of the concrete box, and the tail of the shield machine The process of setting a new concrete box behind the propulsion jack shrunk inside the section is repeated as appropriate to embed concrete boxes in tandem and use with an open shield method in which backfill is put on the concrete box. In the open shield machine, a rear earth retaining plate and a side earth retaining plate are attached to the tail part of the open shield machine, and a backfill soil leveling equipment is provided on the surface level above the tail part. constituted by a smoothing bar Mododo embedding discharged from attached the storage frame at a rear end of the housing frame and receiving frame of Mododo embedding constituting a frame of the flat U-shape Open shield machine which is characterized in Rukoto. The process of excavating and discharging the earth and sand in front of the front or top opening of the open shield machine with the excavator, the process of extending the propulsion jack and moving the shield machine forward with the reaction of the concrete box, and the tail of the shield machine In the open shield construction method in which the concrete box is sequentially embedded in columns by repeating the process of setting a new concrete box behind the propulsion jack shrunk in the section, and backfilling soil is put on the concrete box, A rear earth retaining plate and a side earth retaining plate are attached to the tail part of the open shield machine, and a backfill soil storage frame composed of a plane U-shaped frame is formed on the surface level above the tail part . rear end attachment provided a leveling flooring Mododo embedding constituting facilities and smoothing bars of the discharge for embedding Mododo from said housing frame, with the advancement of the open shield machine, storage frame The Mododo embedding flowing Te Rakobore, open shield tunneling, wherein a leveled laying in leveling bar is moved forward by the forward open shield machine.

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