JP2017020264A - Placement device and placement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a placement device using a tremie pipe, which can be lowered/lifted in a suspended state without use of lifting equipment, which dispenses with a hanger, which achieves shortening of removal time and which can reduce hands for removal work, and a placement method.SOLUTION: In a placement device using a tremie pipe 1, a side part of each unit pipe 3 of the tremie pipe 1 is provided with a pipe 25 for being engaged with/disengaged from a wire rope 26; the wire rope 26 capable of being wound up and unwound is inserted through the pipe 25; and an end of the wire rope 26 is locked to the tip of the tremie pipe 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a placing device and a placing method using a tremy tube.

  Tremy pipes are pipes that start casting concrete from the bottom, and are connected when pouring fluidized materials such as ready-mixed concrete and mud mortar into cast-in-place piles or groove walls excavated in underground continuous wall construction. Points to the pipe.

  The use of a tremy pipe is generally about 70 meters underground, although the depth of the groove wall may reach 130 meters underground. Then, a soil stabilization liquid having a low specific gravity such as mud water or bentonite liquid for preventing collapse is put into the excavated groove wall, and a tremy pipe is inserted to flow high specific gravity ready-mixed concrete or soil cement from the tip of the tremy pipe. At this time, in order to prevent the mixing of the low specific gravity soil stabilizer and the high specific gravity of ready-mixed concrete, the tip of the tremy tube is always controlled to be 2-6 m above the top of the material to be driven and to be in the lower part.

  Various lengths of treme tubes are available in advance. Depending on the depth of the groove wall, the treme tube selected from 6m, 5m, 4m, 3m, 2m, and 1m can be selected in the vertical direction. It is connected so as to have a length, and is extended to reach the vicinity of the bottom of the excavated underground hole for use.

  FIG. 8 shows an example of a joint-type tremy tube. The tremy tube 1 is composed of a hopper 2 located at the upper part and a unit pipe 3 connected to the lower side thereof, and a male screw 4 and a female screw 5 are mutually connected. It is connected by screw connection. In the figure, 6 is a hanger for hanging.

The following Patent Document 1 is proposed as a connecting means capable of improving the operability and safety when connecting a large number of tremy pipes at a construction site, thereby achieving high efficiency.
JP 2011-6999 A

  As shown in FIG. 9, 11a and 11b are tremey tubes that are connected to each other. On the outer wall surface of the small-diameter fitting portion 14 provided at one end portion (the lower end portion in the drawing) of one tremy tube 11a, a circumferentially connectable connector 15 made of a flexible rod-shaped body is removably inserted. A groove portion 16 is formed.

  The other end portion (the upper end portion in the drawing) of the other tremy tube 11b is provided with a large-diameter fitting portion 19 through which the small-diameter fitting portion 14 provided in the one tremey tube 11a can be inserted. On the inner wall surface of the large-diameter fitting portion 19, a circumferential groove portion 10 into which a connector 15 made of a flexible rod-like body can be inserted and removed is formed.

  Further, a long hole-like opening in which a connecting member 15 made of a flexible rod-like body and provided with a handle 15a is removably attached to a portion corresponding to the groove portion 10 on the outer wall surface of the large-diameter fitting portion 14. The part 9 is opened.

  Reference numeral 7 denotes a tremmy band mounted in the vicinity of the upper end portion of the tremy tube 11b, and the lower end surface of the edge portion of the tremy band 7 is engaged with the upper end surface of the support member 22 installed on the opening edge portion of the underground hole. Support. Reference numeral 8 denotes a pin for opening and closing the tremy band 7.

  When connecting the tremey pipes 11a and 11b, the fitting part 14 on one tremey pipe 11a side is inserted into a large-diameter fitting part 19 provided at the other end of the other tremy pipe 11b, and the groove part 16 is inserted. The operator inserts the connector 15 into the opening 9 by using the handle 15a of the connector 15 at a position where the groove portion 10 and the groove portion 10 coincide with each other.

  Then, from the rod-like body having flexibility in the annular hole formed in the groove 16 and the groove 10 formed along the circumferential surface of the small-diameter fitting portion 14 and the large-diameter fitting portion 19. The connecting tool 15 is annularly accommodated, and both tremey tubes 11a and 11b can be engaged with each other and connected under an airtight seal.

  On the other hand, when pulling apart both the tremy tubes 11a and 11b, the operator pulls the connector 15 from the opening 9 using the handle 15a, so that the small-diameter fitting portion 14 is removed from the large-diameter fitting portion 19. Easily separate.

  Therefore, according to the above-described tremy tubes 11a and 11b, the tremy tubes 11a and 11b can be attached to and detached from each other by performing an operation of simply inserting and removing the flexible long connector 15 from the opening 11. .

  The joint-type tremy tube shown in FIG. 8 has a high product cost, such as thread cutting, because it is a coupling method using a male screw 4 and a female screw 5.

  Further, a crane or the like is required using the hanger 6 for pulling up, and further, it is inconvenient that the connection with a screw is troublesome to remove from the uppermost part, and it must be performed while supporting the lower side.

  Although Patent Document 1 in FIG. 9 can easily attach and detach the tremmy pipes, a support member 22 as shown in FIG. A special member for hooking, for example, a tremy band 7 is required.

  The object of the present invention is to eliminate the inconveniences of the conventional examples, and in the installation device using the tremy tube, it can be hung and lifted without using a lifting machine, no hanger is required, and further, the removal time is reduced. Another object of the present invention is to provide a placement device and a placement method that can reduce the manpower required for removal work.

  In order to achieve the above object, the present invention provides, as a driving device, firstly, in a tremmy device, a connecting / disconnecting pipe to a wire rope is provided on the side of each unit tube of the tremy tube, A wire rope that can be fed is inserted through this engagement / disengagement pipe, and the end of the wire rope is locked to the tip of the tremmy tube. Second, the wire rope is wound and fed by a winch. Third, the wire rope The gist is that they are arranged in pairs on the left and right sides of the tremy tube.

  In addition, as a placing method, first, an engagement / disengagement pipe to the wire rope is provided on the side of each unit tube of the tremy tube, and a wire rope that can be rolled up and fed is inserted through the engagement / disengagement pipe. Using a driving device with the end locked to the tip of the tremy tube, the entire tremy tube is supported by the end of the wire rope, and after the driving, the winding of the wire rope and the maintenance of the supported state are repeated alternately. However, the gist is to sequentially remove each single pipe at the top, and secondly, to monitor the tension of the wire rope and to determine the state of the concrete or the like.

  According to the first and fourth aspects of the present invention, since the entire tremmy pipe is hung up and down with a wire rope that can be wound and unwound, the lifting machine (hangs the whole) is used to remove the uppermost tremy pipe. Is not necessary and is always suspended from the bottom, so it is not necessary to consider the weight of the entire tube during tube removal. Since the entire tremy tube is suspended, there is no need to remove the sling from the tube. In addition, the removal time is shortened and the number of manual removal operations is reduced.

  Moreover, since it is suspended from the bottom at all times, it is not necessary to thread the pipe joints of the unit pipes of the tremmy pipes, and the manufacturing cost can be reduced.

  According to the second aspect of the present invention, the wire rope can be wound and fed efficiently and controllable by winding and unwinding with a winch.

  According to the third aspect of the present invention, the wire ropes can be supported stably on the left and right sides by arranging them as a pair on both the left and right sides of the tremy tube.

  According to the fifth aspect of the present invention, when the concrete in the tremy pipe rises, the tremy pipe receives a force drawn downward, so that it is possible to grasp the presence or absence of concrete blockage by monitoring the winch tension. .

  As described above, the placing device and the placing method according to the present invention can be hung and lifted without using a lifting machine in a placing device using a tremy tube, no hanger is required, and further, the removal time is shortened. This can reduce the manpower required for the removal work.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a first embodiment of a driving device and a driving method according to the present invention. In FIG. 1, reference numeral 1 denotes a tremy tube, 3 denotes a unit tube, which is a driving device using a tremy tube. In addition, illustration about a hopper is abbreviate | omitted.

  An engagement / disengagement pipe 25 to the wire rope 26 is provided on the side of each unit tube 3 of the tremy tube 1, and the engagement / disengagement pipe is inserted through the wire rope 26 that can be wound and fed.

  The engagement / disengagement method of the engagement / disengagement pipe 25 to / from the wire rope 26 is not limited as long as the engagement / disengagement pipe 25 can be fitted from the side of the wire rope 26. However, as shown in FIG. 25 forms a slit 25a through which the wire rope 26 can be taken in and out, and the wire rope 26 can be taken into the engagement / disengagement pipe 25 through the slit 25a.

  It is assumed that the engagement / disengagement pipe 25 has such a length that the taken-in wire rope 26 cannot be easily pulled out.

  The wire rope 26 can be wound and fed out by a winch 27 installed on the ground.

  As another method, the engagement / disengagement pipe 25 may be divided in the vertical direction so that it can be opened and closed so that the same operation can be performed.

  The distal end of the wire rope 26 inserted into the engagement / disengagement pipe 25 is locked so that it can be engaged / disengaged at the distal end of the tremy tube 1 (the distal end of the lowest unit tube 3). The locking method is not particularly limited and may be bolts and nuts, but a rope insertion tube 28 is attached (no slit) as shown in FIGS. 3 and 4 so that the tip of the wire rope 26 does not come out from here. Attach the fasteners 29 to the

  The fasteners may be the bolts, nuts, washers, etc., but those that can be firmly locked and easily removed by hand are desirable, and shackles may be used as shown.

  The wire ropes 26 are arranged on the left and right sides of the tremy tube 1, and for this purpose, the engagement / disengagement pipes 25 are attached to the left and right of the unit tube 3 at intervals of 180 °. Two winches 27 are also installed.

  The unit tubes 3 need not be connected to each other by a conventional threaded joint, and can be connected by simply fitting 30 as shown in FIG.

  FIGS. 5 and 6 show a second embodiment of the present invention. The unit tubes 3 are connected to each other by a collar 31, and the engagement / disengagement pipe 25 is not provided in the unit tube 3, but the collar 31. It was supposed to be provided on the left and right side parts.

  In this way, when the collar 31 is used as the joint, in order to fit the unit tube 3, it is only necessary to abut.

  Although the hopper is not shown in FIGS. 1 and 5, the hopper is connected to the top. In some cases, a chute of a track mixer is connected to the top.

  In both the first embodiment and the second embodiment, if a tension meter 32 is provided in the middle of the wire rope 26 or on the winch 27, the data is taken into a personal computer or the like, the weight is managed by the tension, and the weight tends to increase. For example, it is determined that the inside of the tremy tube is blocked.

  Next, the placement method of the present invention using the placement device will be described. First, with respect to the set of tremy tubes 1, the wire rope 26 is fed out while supporting the tip of the unit tube 3 at the tip (lowermost stage) with the wire rope 26, and the tremy tube 1 is lowered while the unit tubes 3 are sequentially added.

  With respect to the addition of the unit pipe 3, the feeding of the wire rope 26 may be stopped and the unit pipe 3 may be connected on the unit pipe 3.

  The unit rope 3 that has been added is inserted into the engagement / disengagement pipe 25 by inserting the wire rope 26 from the side into the engagement / disengagement pipe 25.

  When the tremy tube 1 is suspended and set in this manner, concrete or the like is placed in a state where the entire tremy tube 1 is suspended and supported by the wire rope 26.

  At that time, if the tension gauge 32 monitors the winch tension of the wire rope 26, when the concrete or the like rises, the tremy tube 1 receives a force drawn downward, so that the state of the concrete or the like can be read. .

  After placing, the wire rope 26 is wound up and the tremy pipe 1 is pulled up, but when removing from the uppermost one including the hopper, the pulling is stopped and the supporting state is maintained.

  The unit pipe 3 located at the top can be easily removed by removing the wire rope 26 from the engagement / disengagement pipe 25. Thus, each unit is repeated while alternately winding up the wire rope 26 and maintaining the support state. The tube 3 can be removed sequentially.

It is a front view which shows 1st Embodiment of the placement apparatus and placement method of this invention. It is a cross-sectional top view of the principal part which shows 1st Embodiment of the placement apparatus of this invention. It is a front view of the front-end | tip part of the placement apparatus of this invention. It is a perspective view of the principal part of the front-end | tip part of the placement apparatus of this invention. It is a front view which shows 2nd Embodiment of the placement apparatus and placement method of this invention. It is a cross-sectional top view of the principal part which shows 2nd Embodiment of the placement apparatus of this invention. It is a vertical side view of the principal part which shows 2nd Embodiment of the placement apparatus of this invention. It is a front view showing an example of a joint type tremy tube. It is a perspective view which shows a prior art example.

DESCRIPTION OF SYMBOLS 1 ... Tremy pipe 2 ... Hopper 3 ... Unit pipe 4 ... Male screw 5 ... Female screw 6 ... Hanger 7 ... Tremy band 8 ... Pin 9 ... Opening part 10 ... Groove part 11a, 11b ... Tremy pipe 14 ... Fitting part 15 ... Connection Tool 15a ... handle 16 ... groove 19 ... fitting part 22 ... support member 25 ... engagement / disengagement pipe 25a ... slit 26 ... wire rope 27 ... winch 28 ... rope insertion tube 29 ... fastener 30 ... fitting 31 ... collar 32 ... tension Total

Claims (5)

  In a tremmy pipe placing device, an engagement / disengagement pipe to the wire rope is provided on the side of each unit tube of the tremy pipe, and a wire rope that can be wound and fed is inserted through this engagement / disengagement pipe, and the end of the wire rope is connected A driving device characterized by being locked to a tube tip.   2. The driving device according to claim 1, wherein the wire rope is wound and unwound by a winch.   The installation device according to claim 1, wherein the wire ropes are arranged in pairs on the left and right sides of the tremy tube.   Placing / disconnecting pipes to / from the wire rope on the side of each unit pipe of the tremy pipe, inserting a wire rope that can be rolled up and unwinding through this pipe, and placing the end of the wire rope at the tip of the tremey pipe Use the device to support the entire tremy tube at the end of the wire rope, and after placing, remove the uppermost single tube in turn while repeating the winding of the wire rope and maintaining the supported state alternately. A characteristic placement method.   5. The placing method according to claim 4, wherein the tension of the wire rope is monitored to determine the concrete launching state.

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