JP2006169909A - Open shield machine and open shield construction method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible for a pedestrian to walk along the longitudinal direction of an open shield machine during construction work by excavation even when retaining a pedestrian passage at the side of the open shield machine is difficult at the narrow-site construction where the open shield machine and the execution width are about the same size. <P>SOLUTION: In the open shield machine 1 used for an open shield construction method, a side-walk facility 12 is mounted at the upper sides of the open shield machine 1 toward the forward direction. The side-walk facility 12 moves forward along a guide rail 13 with a driving means of side-walk-facility driving jack 15 or the like provided at the upper part of the open shield machine 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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. 20 schematically shows an open shield machine 1, which is a shield machine having left and right side wall plates 1 a and a bottom plate 1 b connected to the side wall plates 1 a with front, rear and top surfaces opened. It is.

  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 as to be within the start mine. The open shield machine 1 is advanced by taking the reaction force against the reaction force 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. 21, the concrete box 4 is an integrated body including 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.

  The burying of the concrete box 4 by such an open shield method is often performed under an existing road. In such a case, if the width of the concrete box 4 is smaller than the width of the road, the construction is underway. Can walk next to the open shield machine 1.

  However, in narrow construction where the width of the concrete box 4 to be buried relative to the road width is large and the construction width is almost the same as that of the open shield machine 1, the side of the open shield machine 1 is for pedestrians. It is difficult to secure a passage. For this reason, the pedestrian is closed, and there is a risk that the daily life may be disturbed.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and to secure a pedestrian passage on the side of the open shield machine 1 in narrow construction where the construction width is almost the same as the open shield machine 1. It is an object of the present invention to provide an open shield machine capable of allowing a pedestrian to walk in the longitudinal direction of the open shield machine during construction by excavation work, and an open shield construction method using the open shield machine.

  In order to achieve the above-mentioned object, the invention according to claim 1 includes a step of excavating and discharging the earth and sand in front of the front or upper surface opening of the open shield machine with an excavator, and a concrete box by extending the propulsion jack. The process of advancing the shield machine with the body as a reaction force 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 to embed concrete boxes in series. In the open shield machine used in the open shield construction method to put the backfill on the concrete box, the side shield equipment is mounted on the upper part of the open shield machine body in the forward direction of the open shield machine. Advancing along the guide rail provided with propulsion means such as a sidewalk equipment propulsion jack provided at the top of the open shield machine It is an gist.

  According to the first aspect of the present invention, since the sidewalk equipment is provided on the upper part of the open shield machine, even in narrow construction where it is difficult to secure the sidewalk to the side of the open shield machine, the sidewalk equipment can be used for walking. It becomes possible, and it can avoid that a pedestrian's life arises.

  And since this sidewalk equipment moves along the guide rail provided in the open shield machine, it moves with the open shield machine and can walk even during excavation.

  In the invention according to claim 2, as an open shield construction method, a step of excavating and discharging the earth and sand ahead of the open shield machine from the front or upper surface opening with an excavator, and extending the propulsion jack 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 construction method in which backfill soil is put on, sidewalk equipment is mounted on the upper part of the open shield machine body in the forward direction of the open shield machine, and the sidewalk equipment is provided on the top of the open shield machine. Use an open shield machine that moves forward along a guide rail with propulsion means such as a propulsion jack. After the sidewalk facilities along the guide rails were 1 cycle advanced by said propulsion means, it is an Abstract that is boring the open shield machine.

  The invention described in claim 3 includes a step of excavating and discharging the earth and sand in front of the open shield machine from the front or upper surface opening, and advancing the shield machine by extending the propulsion jack to react the concrete box. And repeatedly placing the new concrete box behind the propulsion jack shrunk in the tail section of the shield machine, and then burying the concrete boxes in tandem in sequence, and backfilling on the concrete box In the open shield construction method, a sidewalk equipment is mounted on the upper part of the open shield machine body in the forward direction of the open shield machine, and the sidewalk equipment is propelled by a sidewalk equipment propulsion jack etc. provided on the top of the open shield machine. An open shield machine is used that moves forward along a guide rail provided with means, and the propulsion means uses the guide shield. It is an Abstract that is boring the open shield machine while simultaneously advancing the sidewalk facilities along Le.

  According to the inventions of claim 2 and claim 3, since the sidewalk facility advances the open shield machine at the same time as the propulsion of the open shield machine or after advancing it one cycle, the open shield machine moves forward following this. Overall, move forward with the open shield machine. Therefore, a walking facility is always provided on the upper side of the open shield machine, and walking does not become impossible due to construction.

  And when the sidewalk equipment is advanced in advance as in claim 2, the sidewalk equipment can be advanced in a state where the face before excavation is stable, and the safety is high.

  The open shield machine of the present invention and the open shield construction method using the open shield machine should secure a pedestrian passage on the side of the open shield machine in narrow construction where the construction width is almost the same as the open shield machine. Even if it is difficult, the walking equipment is installed in the open shield machine, and this walking equipment is moved forward along with the propulsion of the open shield machine. This makes it possible to reduce the obstacles that occur in the daily life of pedestrians.

  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 an open shield method of the present invention and an open shield machine used therefor, FIG. 2 is a plan view partly cut away, and FIG. 3 is a front view of the same. Since the basic configuration of the shield method is the same as the conventional one, a detailed description thereof is omitted here.

  The open shield machine 1 of the present invention is equipped with a sidewalk equipment 12 in addition to the conventional configuration, and the sidewalk equipment 12 is a main body of the open shield machine 1 as shown in the enlarged view of FIG. A guide rail 13 made of, for example, H-shaped steel is laid on the inner side of the side wall plate 1a constituting the side wall 14 and a sidewalk 14 including a floor plate 14a and a handrail 14b is disposed on the guide rail 13, and on the lower surface of the floor plate 14a. The attached guide roller 18 is engaged with the guide rail 13, and the sidewalk 14 is slidably disposed on the guide rail 13 by propulsion means.

  The propulsion means is, for example, by a sidewalk equipment propulsion jack 15, and the cylinder 15a is fixed to the open shield machine 1 side, and the rod 15b is fixed to the floor plate 14a on the sidewalk 14 side. In this case, the sidewalk 14 is divided into a front trunk and a rear trunk, and a sidewalk equipment promotion jack 15 is provided on each of the front trunk and the rear trunk so as to advance individually.

  As a result, the sidewalk 14 follows the advance of the open shield machine 1, and at the same time, the open shield machine is advanced so that the sidewalk equipment promotion jack 15 can advance and advance by one stroke of the sidewalk equipment promotion jack 15. 1 is fixed.

  Further, the sidewalk 14 is longer than the length of the guide rail 13, the front end and the rear end protrude forward and rearward from the open shield machine 1, respectively, the front end is in front of the face, and the rear end is backfilled. Ground on the soil 5. In this case, the carriage 16 is attached to the lower surface of the floor board 14a of the sidewalk 14 so that the front end and the rear end of the sidewalk 14 can smoothly move on the ground surface.

  In the figure, reference numeral 17 indicates a facility for hanging the concrete box 4, and a transfer device such as a hoist is attached to a support column erected on the tail portion 1 c of the open shield machine 1 so as to straddle it. The hanging equipment 17 is arranged at a position that does not affect pedestrians who pass through the sidewalk 14 between the insides of the sidewalks 14 on both sides.

  Next, the open shield construction method using the open shield machine 1 is shown in FIG. 5 to FIG. 8 for the propulsion process diagram, FIG. 9 to FIG. 14 for the installation process diagram for the concrete box 4, and FIG. explain.

  FIG. 5 is a process diagram of a stage before propelling the sidewalk 14, and the concrete box 4 is suspended from the tail part 1 c of the open shield machine 1 in this process. In this embodiment, the concrete box 4 is composed of a lower block 4e and an upper block 4f which are large and divided into two parts.

  As shown in the first process diagram of FIG. 9 and FIG. 10, the concrete box 4 is suspended and the lower block 4 e is suspended by the carry-in vehicle and transferred to the bottom of the equipment 17, and is placed in the tail portion 1 c of the open shield machine 1. Suspend with suspension equipment 17. In this case, the lower block 4e is hung in the direction perpendicular to the laying direction, and the operator turns the lower block 4e in the tail portion 1c as shown in the second process diagram of FIGS. It is inverted 90 degrees and installed at a predetermined position.

  Next, as shown in the third step diagram of FIG. 13, the upper block 4f is suspended in the tail portion 1c of the open shield machine 1 in the same manner as the installation of the lower block 4e, and the worker blocks the upper block in the tail portion 1c. After the direction of 4f is reversed by 90 degrees, the upper block 4f is installed at a predetermined position as shown in the fourth process diagram of FIG.

  Thereafter, the lower block 4e and the upper block 4f are fastened using a PC steel bar or the like.

  During the installation work of the concrete box 4, the sidewalk 14 is installed on the upper side of the open shield machine 1, so that even if the width of the concrete box 4 is equal to the road width, the pedestrian can open the machine. It is possible to pass on the sidewalk 14 installed on top of the road, and there is no blocking. Moreover, since the suspension equipment 17 is disposed at a position that does not affect pedestrian traffic, there is no problem even if the suspension equipment 17 is disposed at the upper part of the open shield machine 1.

  If the concrete box 4 is thus installed in the tail portion 1c, the process proceeds to the sidewalk 14 propulsion step as shown in the second step diagram of the propulsion step in FIG. In this sidewalk propulsion step, first, the rod 15b of the sidewalk equipment promotion jack 15 attached to the front torso of the sidewalk 14 is extended to advance the front torso by one stroke (about 1500 mm) of the jack.

  As described above, the front trunk is advanced by the extension of the sidewalk equipment propulsion jack 15, but the guide roller 18 moves along the guide rail 13 on the sidewalk 14, and the front end of the sidewalk 14 is on the lower surface. Since the provided carriage 16 moves on the ground surface, it moves forward smoothly.

  Next, as shown in the third step diagram of FIG. 7, the rear body portion of the sidewalk 14 is advanced in the same manner as the front body portion, and the front end of the rear body portion is connected to the rear end of the front body portion. As a result, the entire length of the sidewalk 14 advances by one stroke of the sidewalk equipment promotion jack 15.

  Even while the sidewalk 14 is moving forward, excavation work of the face by the open shield machine 1 is performed. Here, the face excavation process will be described with reference to FIGS. The face excavation is performed by an excavator 9 such as a backhoe. The excavator 9 excavates the middle part of the face, and the front part of the front part of the open shield machine 1 and the upper part of the face are excavated. Deploy on the ground.

  Then, as shown in the first process diagram of FIG. 15, the open / close bucket 19 accommodated in the open shield machine 1 is moved and installed to the middle stage in the open shield machine 1 using the box hanging equipment 17.

  Next, as shown in the second process diagram of FIG. 16, the face is excavated by the excavator 9 from the inside of the open shield machine 1 and the front ground part. In this case, simultaneously with excavation, the slide side earth retaining plate provided on the side portion of the front portion of the open shield machine 1 is propelled to prevent the collapse of the ground on the side of the face.

  The excavated residual soil of the face is put into an open / close bucket 19 installed in the middle stage of the face, and the front of the open shield machine 1 is excavated by the ground excavator 9 (see the third process diagram of FIG. 17). In addition, when throwing soil into the open / close bucket 19, the excavator 9 is turned in the open shield machine 1, but in this case, as shown in FIG. Secure.

  Next, as shown in FIG. 19, the soil in the open / close bucket 19 is transported to the rear of the open shield machine 1 by the box suspension equipment 17 and put into the dump truck 20 arranged here. Further, the earth excavated by the excavator 9 in front of the open shield machine 1 is put into a dump truck 20 in front as shown in FIG.

  The face excavation is performed as described above, and after the excavation is completed, the open shield machine 1 is propelled as shown in FIG. The propulsion length is equal to the propulsion length of the sidewalk 14 propelled in advance. At this time, the sidewalk 14 is in a stopped state, and only the open shield machine 1 is advanced under the sidewalk 14. Then, backfill injection is performed.

  The timing of the propulsion of the sidewalk 14 and the propulsion of the open shield machine 1 is not limited to the method of propelling the sidewalk 14 for one stroke, excavating during this period, and then propelling the open shield machine 1 as described above. Alternatively, the sidewalk 14 can be promoted simultaneously with excavation.

  The method for propelling the open shield machine 1 after propelling the sidewalk 14 can propel the sidewalk 14 in a state where the face is stable, and is higher in safety.

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 partially cutaway plan view showing an embodiment of an open shield machine of the present invention and an open shield method using the same. It is a front view which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is a vertical front view of the sidewalk part which is the principal part which shows embodiment of the open shield machine of this invention. It is the 1st process figure of the propulsion process which shows the embodiment of the open shield machine of the present invention, and the open shield construction method using the same. It is a 2nd process figure of the propulsion process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is a 3rd process figure of the propulsion process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is a 4th process figure of the propulsion process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is a 1st process drawing of a box installation process showing an embodiment of an open shield machine of the present invention and an open shield construction method using the same. It is the 1st process figure of the front side of the box installation process which shows the embodiment of the open shield machine of the present invention, and the open shield method using this. It is a 2nd process figure of the box installation process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is the 2nd process figure of the front side of the box installation process which shows the embodiment of the open shield machine of the present invention, and the open shield method using this. It is a 3rd process figure of the box installation process which shows embodiment of the open shield machine of this invention, and the open shield method using this. It is a 4th process drawing of a box installation process showing an embodiment of an open shield machine of the present invention and an open shield method using the same. It is the 1st process drawing of the face excavation process which shows the embodiment of the open shield machine of the present invention, and the open shield construction method using the same. It is a 2nd process figure of the face excavation process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is a 3rd process figure of the face excavation process which shows embodiment of the open shield machine of this invention and the open shield construction method using this. It is a 3rd process figure by the side of the front of the face excavation process which shows embodiment of the open shield machine of this invention and the open shield construction method using this. It is a 4th process figure of the face excavation process which shows embodiment of the open shield machine of this invention, and the open shield construction method using this. It is explanatory drawing 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 4e Lower block 4f Upper block 5 Backfill soil 6 Grout material 7 Height adjustment Material 8 Pushing angle 9 Excavator 10 Opening 11 Blade opening 12 Sidewalk equipment 13 Guide rail 14 Sidewalk 14a Floor board 14b Handrail 15 Sidewalk equipment promotion jack 15a Cylinder 15b Rod 16 Cart 17 Lifting equipment 18 Guide roller 19 Opening / closing bucket 20 Dump truck

Claims (3)

  Excavation and excavation of the earth and sand ahead of the front or top opening of the open shield machine, the process of advancing the shield machine using the reaction force of the concrete box by extending the propulsion jack, 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 open shield machines, sidewalk equipment is mounted on the upper part of the open shield machine in the forward direction of the open shield machine, and the sidewalk equipment is provided with propulsion means such as a sidewalk equipment propulsion jack provided at the top of the open shield machine. An open shield machine that moves forward along the guide rail provided.   Excavation and excavation of the earth and sand ahead of the front or top opening of the open shield machine, the process of advancing the shield machine using the reaction force of the concrete box by extending the propulsion jack, and the tail of the shield machine Open in the open shield method, in which concrete boxes are laid in columns in sequence by repeating the process of setting a new concrete box behind the propulsion jack shrunk inside the unit, and then backfilling soil is put on the concrete box. The sidewalk equipment is mounted on the upper part of the open shield machine body in the forward direction of the shield machine, and the sidewalk equipment is provided on the upper part of the open shield machine along the guide rail provided with propulsion means such as a sidewalk equipment propulsion jack. Use an open shield machine that moves forward, and use the propulsion means to install sidewalk equipment along the guide rail. After the cycle advances, open shield tunneling, characterized in that for excavation open shield machine.   Excavation and excavation of the earth and sand ahead of the front or top opening of the open shield machine, the process of advancing the shield machine using the reaction force of the concrete box by extending the propulsion jack, and the tail of the shield machine Open in the open shield method, in which concrete boxes are laid in columns in sequence by repeating the process of setting a new concrete box behind the propulsion jack shrunk inside the unit, and then backfilling soil is put on the concrete box. The sidewalk equipment is mounted on the upper part of the open shield machine body in the forward direction of the shield machine, and the sidewalk equipment is provided on the upper part of the open shield machine along the guide rail provided with propulsion means such as a sidewalk equipment propulsion jack. Use an open shield machine that moves forward, and use the propulsion means to install sidewalk equipment along the guide rail. Open shield method for causing the excavation open shield machine while at the same time advances.

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