JP2017014759A - Open shield machine and box body installation construction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open shield machine and a box body installation construction method using the same, which secure a space for installing a mobile crane such as a crawler crane or truck crane, allow the mobile crane to be entered only when required without requiring a space for suspending a box body and thereby enabling easy and fast installation construction.SOLUTION: An open shield machine 1 has a machine body comprising left and right side wall plates and a bottom plate divided in the longitudinal direction into a front part 2 and a tail part 3, and in which an articulated part 16 is formed by fitting a front end of the tail part 3 into a rear end of the front part 2, providing articulated jacks 4 at the front part 2 in a manner of facing the rear and allowing the front part 2 and the tail part 3 to be bendable at the mutually fitting part. Further, the tail part 3 has the rear half thereof formed as a box body installation part, and shield jacks 5 are arranged facing the rear on the front side of the box installation part, in a manner of shifting to left and right sides or arranged in plural vertical stages. In the open shield machine, the tail part 3 has an upper floor part of the front half thereof formed as a mounting stage 30 for a mobile crane 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an open shield machine and a box installation method for refurbishing a river using the same.

  As is well known, the open shield method is a highly rational method that takes advantage of the open cut method (open method) and the shield method, and in this open shield method, the shield machine is placed at the rear end of the front machine and the rear machine. There are some which are fitted with a front end and can be bent at a mutual fitting portion so that a curve can be constructed or a direction can be corrected.

  For example, as shown in FIG. 4, the open shield machine 1 is basically composed of left and right side wall plates 1a and 1b and a bottom plate 1c connecting the same between the side wall plates 1a and 1b. It is a shield machine which opened the front, back, and upper surface which consist of.

  As shown in FIG. 5, the open shield machine 1 is divided into a plurality of parts in the front-rear direction, and the front end of the rear body as the tail part 3 is fitted into the rear end of the front body as the front part 2, The middle bent portion 16 that can be bent is formed at the fitting portion.

  The front part 2 is mainly used for excavation, and has a front end and an upper surface as open surfaces, and the front end is a blade opening part. It is arranged.

  On the other hand, the tail portion 3 is used to install a concrete box 8. In the body, the front half is directed to the front and the shield jack 5 is directed to the left and right, and the jack portions are arranged in a plurality of upper and lower stages. The latter half is a box installation section for hanging the box.

  In the figure, 6 is a movable split blade provided at the front end of the front portion 2, 7 is a side retaining plate provided at the rear end of the tail portion 3, 9 is a strut, and 10 is a press bar (push angle).

  As shown in FIGS. 7 to 10, the open shield method using such an open shield machine 1 is constructed between the start pit and the arrival pit. The open shield machine is assembled in the start pit 11, the ground in front of the start pit 11 is excavated by the excavator type excavator 12 installed on the ground, and the shield jack 5 of the open shield machine 1 is extended to start the start pit 11. The open shield machine 1 is moved forward by taking the reaction force against the reaction wall inside, and the first concrete box 8 forming the underground structure is suspended from above, and within the tail part 3 of the open shield machine 1 Set with the strut 9 and the press bar 10 behind the shrunk shield jack 5.

  Further, the start pit 11 is constituted by a retaining wall such as a sheet pile, and in order to start the open shield machine 1, a part of the retaining wall 11 is mirror-cut, but if necessary, a front portion of the starting pit 11 by chemical injection or the like. The ground may be improved.

  Next, similarly, the excavator 12 excavates the earth and sand from the front surface or the upper surface of the front portion 2 and discharges it to advance the open shield machine 1, and the second concrete is placed in front of the first concrete box 8. The box 8 is suspended in the tail portion 3.

  Thereafter, the same excavation and setting process of the concrete box 8 are repeated, and the concrete boxes 8 are successively buried in the ground in columns, and back dumped by the dump 14 on the concrete box 8 at the rear, and an open shield machine When 1 reaches the reaching mine 13, it is disassembled and removed to complete the construction. In the figure, 15 is a grout machine.

The following patent document has been proposed and patented by the present inventor as an open shield machine that can be easily and quickly suspended without taking up space for a box.
Japanese Patent No. 3194190

  As shown in FIG. 10, Patent Document 1 discloses that the open shield machine 1 is partitioned by a partition wall 29 in the front-rear direction of the machine body, the excavation part that mainly excavates the front half of the front part 2, and the latter part of the tail part 3 is the concrete box 8. It was set as the box installation part to hang and installed, and the box installation part was arranged in the upper and lower sides, and the shield jack 5 was arranged in the upper and lower sides toward the front.

  A concrete box in which a hoisting machine 18 such as a chain block is provided on a frame 17 composed of a column 25 and a beam member 26 so that the hoisting machine 18 such as a chain block can be moved back and forth and left and right above the box installation part of the tail part 3 of the open shield machine 1 A portal crane 19 for suspending was erected.

  As a mechanism of the forward and backward movement and the lateral movement of the hoisting machine 18, the hoisting machine 18 can be moved by a self-propelled wheel or the like using the beam member 26 as a rail.

  Further, the beam member 26 extends forward and rearward, and a lifting portion 27 protrudes in front of the open shield machine 1 and a concrete box lifting portion 21 protrudes rearward. The lifting portion 27 and the concrete box lifting portion 21 are portions where the hoisting machine 18 can move in the front-rear direction. In the figure, 24 is a hanging jig for the concrete box 8.

  There are four struts 25, each of which is set up from the open shield machine 1 via the jack 22 so that the inclination can be corrected.

  Thus, when the excavator 12 excavates the earth and sand from the front surface or the upper surface of the excavating part and removes the soil, the open-type shield machine 1 moves together.

  Then, the concrete box 8 for suspending is carried down to the concrete box lifting part 21 with a carriage 23 or the like using the upper surface of the existing concrete box 8 arranged in a row as a carry-in path, and is suspended by the hoisting machine 18 and opened. The shield machine 1 is moved to above the box installation part at the rear of the shield machine 1 and suspended in the box installation part.

  The hoisting machine 18 can also be used during excavation, and the hoisting machine 18 is moved to the hoisting part 27 protruding in front of the open shield machine 1, and a bucket or the like (not shown) is suspended from the hoisting machine 18. Thus, the earth and sand excavated by an excavator such as a backhoe near the excavation part can be received by a bucket or the like, moved rearward as it is, and transferred to a dump or the like.

  The open shield machine 1 proceeds while correcting the direction, pitching and rolling. However, when the open shield machine 1 is tilted when the concrete box 8 is suspended, the portal crane 19 is used. However, the work is performed after the four cranes 22 are appropriately expanded and contracted so that the portal crane 19 becomes horizontal while looking at the inclinometer.

  In Patent Document 1, a portal crane 19 is always installed in order to suspend the concrete box 8, and when the open shield machine 1 moves forward, the portal crane 19 also moves.

  Therefore, it is necessary to deal with the inclination of the portal crane 19 with respect to the pitching and rolling of the open shield machine 1 so that the portal crane 19 becomes horizontal while the four jacks 22 are appropriately expanded and contracted to look at the inclinometer. However, the modification was quite difficult.

  The object of the present invention is to eliminate the inconvenience of the conventional example, secure a place for installing a mobile crane such as a crawler crane or a truck crane, place the mobile crane only when necessary, and free up space for hanging the box. An object of the present invention is to provide an open shield machine that can be carried out easily and quickly without taking it, and a box installation method using the same.

  In order to achieve the above object, according to the present invention, as an open shield machine, firstly, an airframe consisting of left and right side wall plates and a bottom plate is divided into a front part and a tail part in the front-rear direction, and a tail part is provided at the rear end of the front part. Insert the front end, provide a folding jack at the front part toward the rear, form the middle folding part so that the front part and the tail part can be bent at the mutual fitting part, the tail part latter half as the box installation part, Move the shield jack to the left and right toward the front side of the box installation part, and in the open shield machine arranged in multiple upper and lower stages, a mobile crane mounting stage is formed on the upper floor of the first half of the tail part Secondly, the gist of the present invention is to form a stage for placing the trobucket on the upper floor portion in the latter half of the front portion.

  As a box installation method using an open shield machine, first, in the renovation work of the existing water channel that constructs a new water channel by removing the existing water channel and connecting the box, the body consisting of the left and right side wall plates and the bottom plate is moved back and forth. The front part and tail part are divided into the front part, the front part of the tail part is inserted into the rear part of the front part, and the middle part of the front part is provided with a folding jack. An open shield that forms a bent part so that it can be bent, the latter half of the tail part is a box installation part, the shield jack is moved to the left and right toward the front side of the box installation part, and it is arranged in multiple upper and lower stages In this machine, an open shield machine in which a mobile crane mounting stage is formed on the upper floor of the first half of the tail part is used, and the crawler crane mounting stage of the crawler crane of the open shield machine is used. A mobile crane such as a crane or a truck crane, and with the mobile crane, suspend the box to the foremost part of the existing box at the box installation part in the latter half of the tail part. Second, the box has a U-shaped groove. And transporting the inside of the existing box to the top position, which is a mobile crane lifting place, by a rail carriage, and thirdly, installing an excavator excavator on the lining plate installed on the existing waterway, This excavator excavator excavates the blade edge of the front part, and the excavated soil is put in a tro-bucket of a mounting stage formed on the upper floor part in the latter half of the front part and carried out.

  According to the first and third aspects of the present invention, the mobile crane can be installed on the upper floor portion of the first half of the tail portion by placing the mobile crane on the mounting stage of the mobile crane. The box can be hung on the foremost part of the existing box at the box setting part in the latter half of the tail part.

  And when excavating the open shield machine 1, since this movable crane can be lowered from the mounting stage, it is not necessary to consider the inclination of the crane for pitching and rolling.

  According to the second aspect of the present invention, it is possible to efficiently carry out the remaining soil by placing the toro bucket on the upper floor portion in the latter half of the front portion.

  According to the fourth aspect of the present invention, since the box is a U-shaped groove, the upper side of the existing box is opened, and the inside of the existing box is conveyed by the rail carriage to the leading position where the mobile crane is lifted. The box can be lifted as it is, and the box can be carried in and moved safely without taking up space.

  According to the present invention described in claim 5, in the renovation work of the existing water channel that constructs a new water channel by connecting the box while removing the existing water channel, the installation of the excavator excavator and the installation of the mobile crane are directly performed. It is possible to reasonably perform the open shield machine digging and the box installation with lean movements.

  As described above, the open shield machine of the present invention and the box installation method using the same secure a place to install a mobile crane of a crawler crane or a truck crane, and only place a mobile crane when necessary. The box can be easily and quickly suspended without taking up any space.

  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 open shield machine of the present invention and a box installation method using the same, and FIG. 2 is a plan view of the same.

  As described above, the outline of the open shield machine 1 is divided into a plurality of parts in the front-rear direction, the front part 2 and the tail part 3 are rectangular bodies having left and right side wall plates, and the rear half of the tail part is installed in a box. The shield jack 5 is moved to the left and right toward the front side of the box installation part, and is arranged in a plurality of upper and lower stages. The front end of the tail part 3 is reduced in diameter to the rear end of the front part 2 As a result, a gap is secured between the front portion 2 and the tail portion 3, and this becomes the middle bent portion 16.

  At the rear part of the front part 2, the middle folding jack 4 is arranged rearward and left and right and in a plurality of stages. Although illustration is omitted, there is a movable split blade at the front end of the front portion 2, and reference numeral 41 in the figure is a slide jack.

  In the present invention, the mounting stage 30 of the movable crane 32 is formed on the upper floor portion of the first half of the tail portion 3.

  Further, a placement stage 31 for the tro bucket 33 is formed on the upper floor portion in the latter half of the front portion 2.

  The mounting stage 30 and the mounting stage 31 are formed of a steel plate or the like, and may be fixed, or may be installed as necessary, such as a lining plate.

  Next, the box installation method of this invention performed using this open shield machine 1 is demonstrated.

  In this case, the existing water channel is repaired by constructing a new water channel by connecting the concrete box 8 while removing the existing water channel 34.

  The existing water channel 34 is provided with a drainage pump 35 to form an empty moat, and a soil retaining 36 such as an H-shaped steel or a horizontal sheet pile is applied. Then, a new waterway is constructed while removing the earth retaining 36 while excavating the open shield machine 1.

  The open shield construction method using the open shield machine 1 is as described above. The excavator 12 excavates and removes soil from the front or upper surface of the front portion 2 to advance the open shield machine 1, and the existing concrete box 8 A new concrete box 8 is suspended in the tail portion 3 before.

  The press bar 10 is set behind the shield jack 5 shrunk in the tail part 3 of the open shield machine 1 and the shield jack 5 is extended to take the reaction force against the existing concrete box 8 and advance the open shield machine 1. Thereafter, the same excavation and setting process of the concrete box 8 are repeated, and the concrete boxes 8 are successively buried in the column in the ground to form an underground structure. In the figure, 40 is a plastic backfilling injection material.

  And in order to excavate the earth and sand from the front surface or the upper surface of the front part 2 with the excavator 12, and as shown in FIGS. 1-3, the lining board 37 is installed on the existing water channel 34, and this lining is carried out. An excavator excavator 12 such as a backhoe is installed on the plate 37, and excavated soil is carried in a trobucket 33 of a mounting stage 31 formed on the upper floor portion of the second half of the front portion 2.

  After propulsion of the open shield machine 1, a mobile crane 32 such as a crawler crane or a truck crane is placed on the upper floor portion of the first half of the tail portion 3.

  When the mounting stage 30 of the mobile crane has a level difference and is higher than the ground surface, a step eliminating swash plate is placed on the side of the mounting stage 30 to enter.

  Further, the mounting stage 31 formed on the upper floor portion of the second half of the front portion 2 may be used as an extending portion of the mounting stage 30 and used for adjusting the stop position of the movable crane 32.

  The concrete box 8 is a U-shaped groove, and the water channel formed by the existing concrete box 8 is not a culvert but has an upper surface opened.

  The rail 38 is installed inside the existing concrete box 8, and the newly connected concrete box 8 is moved to the top position of the existing concrete box 8 where the mobile crane 32 is lifted by the rail carriage 39 traveling on the rail 38. Transport.

  Then, the concrete box 8 is suspended by the movable crane 32 at the foremost part of the existing concrete box 8 at the box setting part in the latter half of the tail part 3.

  It is also possible to advance the open shield machine 1 while the mobile crane 32 is mounted when the open shield machine 1 is propelled.

It is a vertical side view which shows one Embodiment of the open shield machine of this invention and the box installation method using the same. It is a top view which shows one Embodiment of the open shield machine of this invention and the box installation method using the same. It is a front view of the existing waterway part. It is a vertical front view which shows the outline | summary of an open shield machine. It is a vertical side view which shows the outline | summary of an open shield machine. It is a side view which shows the 1st process of an open shield method. It is a side view which shows the 2nd process of an open shield method. It is a side view which shows the 3rd process of an open shield method. It is a side view which shows the 4th process of an open shield method. It is a side surface which shows a prior art example.

DESCRIPTION OF SYMBOLS 1 ... Open shield machine 1a, 1b ... Side wall plate 1c ... Bottom plate 2 ... Front part 3 ... Tail part 4 ... Folding jack 5 ... Shield jack 6 ... Movable split blade edge 7 ... Side retaining plate 8 ... Concrete box 9 ... Strut 10 ... Press bar 11 ... Start pit 12 ... Excavator 13 ... Arrival mine 14 ... Dump 15 ... Grout machine 16 ... Folding part 17 ... Frame 18 ... Hoisting machine 19 ... Portal crane 21 ... Concrete box lifting part 22 ... Jack 23 ... Bogie 24 ... Lifting jig 25 ... Post 26 ... Beam material 27 ... Lifting part 29 ... Bulkhead 30 ... Mounting stage 31 ... Mounting stage 32 ... Mobile crane 33 ... Toro bucket 34 ... Existing waterway 35 ... Drainage Pump 36 ... Doll 37 ... Cover plate 38 ... Rail 39 ... Rail carriage 40 ... Plastic backfilling injection material 41 ... Slide jack

Claims (5)

  The fuselage consisting of the left and right side wall plates and the bottom plate is divided into the front part and tail part in the front-rear direction, the front end of the tail part is fitted at the rear end of the front part, and the middle jack is provided at the front part toward the rear, and the front part And the tail part can be bent at the mutual fitting part to form a middle fold part, the latter half of the tail part is used as a box installation part, and the shield jack is moved back and forth to the front side of the box installation part. In the open shield machine arranged in a plurality of upper and lower stages, an open shield machine characterized in that a mounting stage of a movable crane is formed on the upper floor part of the first half of the tail part.   2. The open shield machine according to claim 1, wherein a stage for placing the tro bucket is formed on the upper floor portion of the second half of the front portion.   In the renovation work of the existing waterway that constructs a new waterway by connecting the box while removing the existing waterway, the fuselage consisting of the left and right side wall plates and the bottom plate is divided into the front part and the tail part in the front-rear direction, and at the rear end of the front part Insert the front end of the tail part, and provide a middle folding jack on the front part toward the rear to make the front part and tail part bendable with each other's fitting part to form a middle folding part. Place the mobile crane on the upper floor of the front half of the tail part of the open shield machine that is placed in multiple stages above and below the shield jacks to the left and right of the front side of the box installation part. An open shield machine having a stage is used, and a crawler crane or a mobile crane of a truck crane is mounted on the mounting stage of the mobile crane of the open shield machine. Box body placed method using an open shield machine, characterized in that lowering the hanging at the forefront of the existing box making body box making body a box body installation section of the second half of the tail section in the lane.   The box installation method using the open shield machine according to claim 3, wherein the box is a U-shaped groove, and the inside of the existing box is conveyed to a leading position as a moving crane lifting place by a rail carriage.   An excavator excavator is installed on the lining plate installed on the existing waterway, and the excavator excavates the blade edge of the front part with this excavator excavator, and the excavated soil is formed on the upper floor of the second half of the front part. The box installation method using the open shield machine of Claim 3 or Claim 4 which puts in the Toro bucket of an installation stage, and carries it out.

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