JP2015113581A - Construction method of structure and support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of stably supporting a construction member exiting in the middle of construction, without hindering turning operation of a crane, in work for constructing a structure by continuing the expansion by using a constructed part as a scaffold.SOLUTION: In a method for constructing the structure by using the constructed part, a guiding material 31 being one kind of a construction member is extended in the expansion direction from the constructed part 21, and a substantially beam-shaped support device 1 capable of supporting this guiding material is installed so as to overhang to an expansion area 22 from the constructed part 21, and the guiding material 31 is supported by an overhung support device 1. The support device 1 comprises a support part 3 for supporting the guiding material 31 existing in a construction midway part by overhanging in the expansion direction from the constructed part, and a reaction securing part 2 fixed to the constructed part and securing reaction for the support part. The reaction securing part 2 is constituted in a substantially beam shape, and is fixed in the lateral direction to the constructed part of the structure. The support part 3 supports by imparting upward tensile force to the guiding material by overhanging above the guiding material 31 existing in the expansion area.

Description

  The present invention relates to a support device for supporting a construction member in the middle of construction and a method for constructing a structure using the support device. The structure here includes, for example, a structure that is constructed by using a constructed part as a scaffold and is expanded laterally (for example, a bridge, a pier, an artificial ground, etc.). For construction members supported by the support device, in addition to the material that constitutes a part of the structure, the target structure (restraint pile, earth retaining pile, steel pipe sheet pile, etc.) installed at any position along the structure. Walls, steel shell structures, etc.) and the equipment, equipment, conductors, formwork, tools and others used in the construction of those structures.

(Specific example of a structure to be built while expanding using the constructed part as a scaffold)
Based on FIGS. 14-17, the conventional pier construction currently used widely by rapid construction is demonstrated.
FIG. 14 is a perspective view showing a conventional pier construction, and shows a state where the pier panel 71 is transported to a target position (connection position with respect to the constructed part) by a crane and is suspended.
FIG. 15 is a perspective view showing a post-process of FIG. 14 and shows a state where the extended pier panel 71 is used as a guide and the support pile 73 is driven on the ground.
FIG. 16 is a plan view showing a pier panel 71 used in the pier construction shown in FIGS. 14 and 15.
FIG. 17 shows a state where the support pile 73 is driven using the drilling device 90.

  In the pier construction disclosed in Patent Document 1, first, as shown in FIG. 14, a mobile crane is prepared on a scaffolding composed of a pier-constructed part, and a pier panel 71 is suspended by the crane, and an extension point ( Transport to the end of the pier constructed part). This pier panel 71 is an “upper structural component (construction member)” that can function as a part of the upper structure after completion of the pier, and at the same time, as shown in FIG. It is a member that functions as a “guide material (pile guide means)” as a positioning member. FIG. 16 shows a plan view of the jetty panel 71.

  As shown in the plan view of FIG. 16, the jetty panel 71 mainly includes a main frame 51 and a cross beam 52 connected to the main frame. The main frame 51 is a frame-like member having functions as a main beam and a horizontal beam. The cross girder 52 has a cylindrical pile head fixed pipe 53 (pile guide pipe) that guides the support pile to the ground at the time of placing, and a connecting member 55 that is connected to the main frame at the next stage. The cylindrical pile head fixing tube 53 has an insertion hole (guide hole) for allowing the support pile 35 to be inserted.

  Subsequently, the pier panel 71 transported by the crane as shown in FIG. 14 is connected to the existing girder (existing pier panel 71 ′) on the tip side of the pier constructed part, and as shown in FIG. Install so that it protrudes from the built part. The existing jetty panel 71 ′ is configured in the same manner as the extended jetty panel 71.

  In the state shown in FIG. 15, the pier panel 71 extending so as to protrude from the pier constructed part is connected to the upper end portion of the long reaction force pole 43 through the wire 42. This reaction force pole 43 is fixed upright on the existing pier panel 71 ′ at the tip side of the pier constructed part, and the reaction force is reinforced by the reinforcing material 41 stretched obliquely at the rear. It is illustrated.

  By connecting the extended jetty panel to the reaction force pole 43 via the wire 42 as shown in FIG. 15, the load on the jetty panel is deposited on the side where the jetty has been built. Therefore, by using the reaction force pole 43 and the wire 42 to suspend the pier panel 71 from the pier constructed part side in a slanted manner, it is no longer necessary to suspend by a crane as shown in FIG. As shown in FIG. 15, the crane can be used for pile driving.

  And as mentioned above, when the state where the pier panel 71 is suspended from the oblique direction by the standing reaction pole 43 having a long length is secured, as shown in FIG. While being guided by the extended jetty panel 71, it is set on the ground at the planned placement position. At this time, the drill rod of the hole drilling device 90 penetrates the inner space of the support pile 73, and the tip bit (hammer bit) of the drill rod protrudes from the tip of the support pile 73.

  Subsequently, while rotating and excavating the target ground with the drilling device 90, the support pile 73 is driven at the same time with a striking force, and then the head of the placed support pile 73 is fixed to the pier panel 71, and the support pile 73 is fixed. The head and the jetty panel 71 are integrated.

  In the example shown in the figure, every time one pier panel 71 is extended, three support piles are driven side by side, and these pile heads are fixed and integrated to the distal end side of the extended pier panel 71. Let In this way, by fixing the pier panel 71 to the head of the support pile 73 that has been placed, the load of the pier panel 71 is supported by the support pile 73. Through these steps, the extension work of the upper structure and the lower structure for one span length (one pier panel) is completed.

  In addition, when the cast support pile 73 and the pier panel 71 are integrated, the wire 42 is cut off from the newly installed pier panel 71, and the reaction force pole 43 and the reinforcing member 41 are removed from the existing pier panel 71 '. The removed reaction force pole 43 and the reinforcing member 41 are attached to the newly installed pier panel 71 and used as a support member for slanting the pier panel to be extended next time.

  And the process mentioned above is repeated and the whole pier is completed by continuing extending the pier panel supported by a support pile in an expansion direction.

Japanese Patent No. 3211673

  In the pier construction described above, the pier panel is formed by suspending the pier panel (conducting material), which is an extended superstructure component, diagonally with a wire using a reaction pole standing on the side where the pier has been built. Is supported temporarily and stably. However, in the above-described prior art, the reaction force pole, reinforcement, wire, etc. for supporting the jetty panel hindered the turning motion of the upper swing body of the crane. There was a problem that was limited.

  Accordingly, when the crane shown in FIGS. 14 and 15 needs to be turned, for example, it is necessary to turn the crane after moving back to a rear position that does not interfere with the turning operation of the upper turning body. It took time and effort and hindered rapid construction.

  Further, when the work is carried out with the crane retracted as described above, the crane is moved away from the extension point of the pier panel, so that the rated load of the crane is further limited, and the connection of the pier panel as shown in FIG. There was a risk of hindering work. Also, depending on the load of the suspended load and the distance to the suspension point, there is a possibility that the rapidity may be further hindered by, for example, subdividing the member in order to work safely. Furthermore, there is a possibility that the process becomes complicated due to the subdivision of the work and it is difficult to ensure safety.

  Such problems are not necessarily limited to pier construction, but a method of constructing a structure by continuing to expand using the constructed part as a scaffold (for example, bridge construction, artificial ground, etc. In the case of using a crane in construction), the same problem as described above has occurred.

  Therefore, in view of the above-described problems, the object of the present invention is to prevent the crane turning operation from being hindered in the construction in which the constructed part is used as a scaffold and is continuously expanded to construct the structure. Construction members (such as superstructures and substructures, or members associated therewith, and other equipment and members necessary for the construction of structures) can be stably supported, and work efficiency can be improved without compromising the safety of construction work. It is to provide an apparatus and method that can be improved.

  The above object is a method of constructing a structure using a constructed part, comprising a step of arranging a construction member in an extending direction of the constructed part, and a substantially beam-like support device capable of supporting the construction member. And a step of installing the construction member so as to project from the constructed part in the extending direction, and the construction member is supported by the projecting support device.

  In addition, the above object is an apparatus used in construction for constructing a structure using the constructed part, which is fixed to the constructed part of the structure, and projects in the expansion direction from the constructed part of the structure. This is achieved by a support device configured to support a construction member in

  In addition, the above object is an apparatus used in a construction for constructing a structure using a constructed part, and a support part for supporting a construction member in the construction part protruding from the constructed part of the structure in the expansion direction, This is achieved by a support device having a reaction force securing part secured to a constructed part of the structure and securing a reaction force for the support part.

  In the support device, the reaction force securing portion is configured, for example, in a substantially beam shape, and is fixed laterally to a constructed portion of the structure.

  Further, in the above support device, the support portion is configured to protrude above a construction member in the middle of construction, for example, and to support the construction member by applying an upward pulling force.

  Moreover, the said support apparatus WHEREIN: It is preferable that the said support part is equipped with the suspending means for lifting the construction member in the construction middle part.

  Moreover, it is preferable that the said support apparatus has a tension means for pulling the said suspension means.

  In the above support device, it is preferable that the substantially beam-like support portion has a lifting means for supporting the construction member so as to lift it.

  In the above support device, the support portion may be configured to be movable in, for example, an overhanging direction and an anti-overhanging direction.

In the prior art, the reaction force pole standing upright in the constructed part supports the construction member (in the case of the prior art, the “connected pier panel”) in the expanded area that is an incomplete part via a wire or the like It was a composition. Therefore, it is necessary to erect a long reaction force pole on the constructed part and feed the wire diagonally downward from its tip, and support the construction member in the middle part of the construction in a tilted manner and hold it in the target position. was there. However, the suspension member overhanging such as a long reaction force pole has caused various problems such as hindering the turning operation of the crane and delaying the construction work.
On the other hand, in the present invention, the support device projects in the expansion direction from the constructed portion of the structure so that the support device lifts (or pulls up) the construction member in the middle of construction. It has become. In this way, the support device is fixed to the constructed part side and is extended in the expansion direction, so that the construction member in the expansion region is supported, such as a “reaction force pole” and a long member for slanting. Need not be erected.
Therefore, by using the support device of the present invention, it is possible to prevent the turning operation of the crane from being hindered and to smoothly advance the construction / expansion of various structures such as a pier.

  Moreover, in this invention, the reaction force ensuring part is comprised by substantially beam shape, and becomes a structure fixed to the constructed part of a structure sideways. Thus, the part fixed to the constructed part side is configured in a substantially beam shape, and is fixed laterally to the constructed part, thereby preventing the crane turning operation and the like from being hindered. In addition, by configuring the part fixed to the constructed part side in a substantially beam shape, it is possible to stably hold the part (support part) protruding from the support apparatus as a cantilever beam. Become.

  Further, in the present invention, the support part which is a part of the support device is configured so as to protrude above the construction member in the middle of the construction, for example, and to support the construction member by applying an upward pulling force (lifting action) to the construction member. Yes. Thereby, the construction member under the support part can be held at the target position. In addition, even if the construction member receives vibration due to pile driving in the middle of the construction, by providing an upward pulling force (lifting force) and supporting it, the posture of the supporting construction member is stabilized and shaken. Can be suppressed. Thereby, for example, when a pile is driven using the guide of the supporting construction member, the straightness of the pile to be driven is ensured, and the support pile can be driven with high accuracy.

  Moreover, in this invention, the support part which is a part of support apparatus is equipped with the suspending means (for example, wire) for lifting up the construction member in the middle of construction, and the support part pulls up the construction member from the upper part away. (Lifts). In this way, by pulling up the construction member via the suspending means such as a wire, even if the support part itself that is overhanging is bent, the construction member is bent integrally with the support part. It can prevent, and can hold | maintain the attitude | position of the said construction member in the position as designed.

  In the present invention, the supporting device has a pulling means for pulling the suspending means. This makes it possible to finely adjust the position and gradient of the supporting construction member and to correct the deflection, so that the construction member can be set at a predetermined target position.

  Further, in the present invention, the supporting device configured in a substantially beam shape and projecting in a cantilever manner is configured to support the construction member via a lifting means such as an expansion / contraction cylinder provided with an expansion / contraction mechanism. Thereby, it becomes possible to ensure the target position of the construction member through the expansion / contraction operation of the hydraulic expansion / contraction cylinder.

  Moreover, in this invention, the support part of a support apparatus is comprised so that it can be moved to an overhanging direction and an anti-overhanging direction. As a result, for example, the overhanging support part can be stored, folded, or retracted on the constructed part side, so that in the expansion direction (on the construction part side), depending on the progress of construction. The degree of freedom of work can be secured.

  Moreover, in this invention, the said support apparatus is applied in the structure construction method using a crane. If it is a structure construction method using such a support device, the turning operation of the crane is not hindered, and the construction member on the expansion side in the middle of construction can be stably held. Construction work can be carried out efficiently in a situation where safety and safety are ensured.

It is a side view which shows an example (pier construction) of the support apparatus of 1st Embodiment, and a structure construction method using the same. It is process drawing which shows an example (pier construction) of the structure construction method using the support apparatus of 1st Embodiment. FIG. 3 is a schematic plan view corresponding to FIGS. It is a side view which shows the support apparatus of 2nd Embodiment. It is a side view which shows the support apparatus of 3rd Embodiment. It is a side view which shows the modification of the support apparatus of 3rd Embodiment. It is a side view which shows the support apparatus of 4th Embodiment. It is a side view which shows the modification of the support apparatus of 4th Embodiment. It is a side view which shows the support apparatus of 5th Embodiment. It is a side view which shows the modification of the support apparatus of 5th Embodiment. It is a side view which shows the support apparatus of 6th Embodiment. It is a side view which shows the support apparatus of 7th Embodiment. It is a side view which shows the support apparatus of 8th Embodiment. It is a perspective view which shows the conventional pier construction, and has shown a mode that the pier panel is conveyed to the target position (extension plan position) with the crane, and is suspended. It is a perspective view which shows the post process of FIG. 14, Comprising: The extending jetty panel is utilized for a pile guide, and the mode that the support pile is driven is shown. It is a top view which shows the jetty panel (conductor) used with the structure construction method as shown in FIG.14 and FIG.15. It shows a state in which a support pile is driven using a drilling device.

  The support device according to the present invention is a device that is used in a method of constructing a structure by using a constructed part as a scaffold and continuing expansion work on an adjacent part thereof.

First, an outline of the configuration and functions of the support device will be described with reference to FIG.
The “built part 21” shown in FIG. 1 has the same configuration as the pier built part of FIGS. In addition, the “extended area 22 (part in the middle of construction)” illustrated in FIG. 1 indicates an area that is currently in the middle of construction (expansion stage), as in the middle of the construction in FIGS. 14 and 15.

In the present invention and the present embodiment, the “constructed part” includes at least a part that has been constructed to such an extent that it can be used for fixing the support device, and all operations planned for the part are not necessarily completed. It may be an existing structure that is adjacent to the construction site where the present invention is to be carried out (for implementation of the present invention).
In other words, “built part”
-It is a structure that has strength and space to the extent that it can place or fix a support device or other construction machine, and the construction is completed.
・ Specifically, it includes a wide range of permanent structures such as revetments, dam embankments, bridges, artificial ground, and temporary structures such as earth retaining walls, still water sheet pile walls, and piers.
・ These structures are structures constructed by the implementation of the present invention, and the construction is completed as well as the vicinity of the construction place where the present invention is implemented. It also includes some (or all) of the structures that can be used to practice the present invention.
It should be noted that the various “constructed parts” as described above are used in the present invention when various structures are aged in social capital such as roads, railways, bridges, and dams built on the undulating land. Maintenance, repair, and renewal are urgent issues, and reinforcement and additional functions are required to cope with terrestrial and meteorological phenomena such as earthquakes, tsunamis, and unusually heavy rains. Under the various circumstances of the Japanese construction industry, such as the renewal of various facilities and facilities in urban areas where buildings are densely populated, the vicinity of existing structures will be the construction site This is because, in those sites, due to space, cost, and process restrictions, it is difficult to temporarily fix the construction member in a hollow target position by the conventional method.

  Further, in the present invention and the present embodiment, “part in the middle of construction” or “expansion area” includes a part in which the above-constructed part is used for a scaffolding or the like, or a region in which the extension construction is performed. It is.

  Therefore, in the embodiment described below, the pier construction will be described as a specific example of “a method of constructing a structure by continuing the extension work to the side using the constructed part as a scaffold”, but the present invention is described. Applicable methods are not limited to such pier construction. Construction of other structures other than the pier (for example, bridges, artificial ground and work gantry for driving piles across business lines, etc.) and heavy machinery scaffolding It can be widely applied to construction work of various additional structures such as retaining piles, deterrence pile construction, and steel pipe sheet pile walls in dam function addition work at a disaster recovery site where there is a distance from the ground.

  That is, the present invention uses the construction member to carry out the next step (for example, while holding and fixing a construction member (for example, a pile driving material or a bridge construction superstructure) in a hollow state from the constructed part. It is widely used for construction work such as pile driving, upright support, concrete placement of lower and foundation structures, hardening curing, etc.

(First Embodiment of Support Device)
As shown in FIG. 1, the support device 1 in the present embodiment mainly includes
A transversely substantially beam-shaped reaction force securing portion 2 fixed to the upper structure (existing pier panel 31 ′) of the pier constructed part 21;
A laterally substantially beam-shaped support portion 3 positioned so as to protrude into an extension area 22 of the pier (an area in the middle of construction to be newly expanded);
It is comprised by the wire 4 (hanging means) which connects the guide material 31 which plays the role of the positioning member of the structure (in this case support pile) arrange | positioned in the extension area | region 22 of a pier, and the support part 3 .

  In this embodiment, the conductive material 31 is a positioning / guide means and at the same time an upper structural component (construction member). For example, the target structure is a bridge structure between long supports and loads heavy objects. When the weight of the superstructure component is too large, the conductive material 31 is specialized for the purpose of the conductive material that performs only the pile driving in advance, and suppresses the weight. In consideration of safety and the like, a small member (and therefore light weight) can be used. Hereinafter, the member 31 that is a conductor and also functions as an upper structural component (construction member) will be abbreviated as a conductor 31.

  The reaction force securing portion 2 is a main body portion of the support device 1. As shown in FIG. 1, the reaction force securing portion 2 is fixed to the jetty constructed portion 21 and plays a role of securing a reaction force for the support portion 3 protruding to the expansion region 22. The reaction force securing portion 2 is configured in a substantially beam shape, and is fixed sideways in the pier constructed part 21. As described above, the reaction force securing unit 2 is fixed in a state where the reaction force securing unit 2 is within a height range that does not interfere with the upper swing body of the mobile crane 20 in a state where the reaction force securing unit 2 is laterally fixed to the pier constructed part 21.

  The support portion 3 projects above the conductive material 31 (pier panel / upper structural component / construction member) in the construction intermediate region 21 and applies an upward tensile force to the conductive material 31 to support it (lift it). Supporting role). The support portion 3 is configured in a substantially beam shape, and the base end side is held in a cantilevered manner by the reaction force securing portion 2. A wire 4 (hanging means) for suspending the conductive material 31 protruding to the expansion region 22 is attached to the distal end side of the support portion 3.

  Thus, the support part 3 held in a cantilevered manner on the side of the pier constructed part 21 projects in a height range that does not interfere with the upper swing body of the mobile crane 20 in the constructed part. The projecting support portion 3 is positioned above the conductive material 31 extending below the support portion 3. In addition, in this embodiment, although the aspect which the support part 3 protrudes above the conductor 31 is employ | adopted, you may fix the support apparatus 1 so that the support part 3 may protrude below the conductor 31. .

  Further, in the present embodiment, the support portion 3 is held in a cantilever manner by the reaction force securing portion 2 so as to be slidable in the projecting direction and the counter-extending direction, that is, in a state where it can be put in and out. Therefore, in this embodiment, the support device 3 is configured to be stretchable in the longitudinal direction as a whole, and the support portion 3 can be taken in and out as necessary.

  In the pier construction exemplified in the present embodiment, two sets of beam-shaped support devices 1 having the above-described configuration are prepared and arranged on both sides of the constructed portion 21 as shown in FIG. Fixed laterally on 31 '. In the example shown in FIG. 1, a beam-shaped support device 1 arranged and fixed on one side of the crane 20 is shown.

(Method of constructing a structure using a support device)
Next, pier construction is given as a specific application example of the above-described support device, and a specific procedure of the structure construction method will be described based on FIGS. FIG. 2 is a process diagram showing an example of a structure construction method (pier construction) using the support device shown in FIG. 3 (a)-(c) are plan views corresponding to FIGS. 2 (a)-(c), respectively.

  Note that the present embodiment quoting the pier construction is merely an example, and the application target of the present invention is not limited to the pier construction, but “the construction is continued by using the constructed part as a scaffold. Note that it is widely applicable in “construction work”.

1. Step a (step of fixing the support device to the constructed part)
The pier constructed part 21 shown in FIG. 2 (a) is mainly composed of an upper structure (existing pier panel 31 ') and a lower structure (existing support pile 35') for supporting it. The constructed portion 21 is a partial structure of the entire pier to be completed, as in the prior art shown in FIGS. 14 and 15, but the constructed portion (the structure portion shown in FIG. 2 (a)). 21) alone functions as a gantry having an upper structure and a lower structure. Therefore, the pier constructed part 21 can be used as a machine scaffold, and various heavy equipment such as construction equipment and cranes can be carried thereon.

  When the pier constructed part 21 composed of such an upper structure and a lower structure is completed, the beam-shaped support device 1 (two sets) described above is placed on the upper structure of the constructed part 21 as shown in FIG. Fix as shown in FIG. The support device 1 shown in FIG. 2 (a) is suspended on an existing jetty panel 31 'by using a crane located in a rear constructed part (not shown).

The location and method for fixing the support device 1 in the pier constructed part 21 are not particularly limited. For example, the reaction force securing portion 2 of the support device is bolted to the pile head fixing pipe 53 of the existing pier panel 31 ′. . Note that the existing jetty panel 1 ′ that forms part of the upper structure of the structure-constructed portion 21 has the same configuration as the jetty panel 71 and the existing jetty panel 71 ′ shown in FIG. 16 cited in the description of the prior art. Have.
In step a, in the construction base point where there is no pier built part 21 which is a built part, an existing structure such as a seawall capable of fixing the reaction force securing part can be replaced as a built part. Even when the ground without existing structures becomes the base point, the equipment such as temporary piles and anchors to be placed on the ground to fix the reaction force securing part, and the installed counterweight etc. Can be configured.

2. Step b (step of connecting the conductive material so as to project from the part where the structure has been built)
Next, as shown in FIG. 2 (b) and FIG. 3 (b), the mobile crane 20 is prepared in the constructed portion 21 (machine scaffold), and this is used to preliminarily introduce the conductive material. 31 is suspended in front of or on the side of the constructed part 21 (ie in front of the pier extension direction). In addition, this conducting material 31 functions as a pile guide at the time of support pile driving | running | working, and functions as an upper structure structural member (namely, jetty panel which is a part of upper structure) after completion | finish of driving | running | working of a support pile.

  Next, the conductor 31 suspended from the front or side of the pier constructed part 21 is positioned in a state of projecting from the constructed part 21, and a bolt or the like is placed on the tip side of the existing pier panel 31 'of the constructed part. Connect with As a result, as shown in FIGS. 2B and 3B, a state in which the conductive material 31 extends from the constructed portion 21 and is extended is ensured.

  The existing pier panel 31 ′ of the structure-constructed portion 21 is a member functioning as a guiding material (guide means) at the time of placing the existing support pile 35 ′. Is functioning as part of The existing jetty panel 31 'and the conductive material 31 have the same configuration.

  Through the above procedure, the conductive material is newly arranged in an extended state above the ground to which the support pile is to be placed, and a state in which the pile head fixing pipe 53 is located directly above the placement position is ensured. In this state, a separation (height difference) occurs between the installed conductive material position and the placement target ground.

  In this step, the conducting material 31 is connected so as to protrude from the pier-constructed portion 21, but the conducting material 31 is held at the target position by the wire 25 fed out from the crane 20. That is, at this stage, since the conductive material 31 has not reached the stage where it is held by the constructed portion 21, the load is supported by the crane 20.

3. Step c (Step of supporting the conductive material with the support device fixed to the part where the structure has been built)
The conductive material 31 connected so as to protrude from the constructed part 21 in the above-mentioned process functions as a part of the upper structure after the construction of the pier. It functions as a “working scaffold”. On the other hand, as shown in FIG. 2 (b), the crane necessary for placing the support pile is currently used for suspending the conductive material 31, so that the crane should be used for placing the pile as it is. I can't.

  Therefore, in this process, the means for supporting the conductive material 31 is supported laterally from the crane 20 on the constructed part so that the support pile can be driven using the crane 20 in the subsequent process. The operation of hanging on the device 1 is performed.

As a specific procedure of this step, first, the support portion 3 is pulled out from the reaction force securing portion 2 of the support device 1 as shown in FIGS. (As described above, the support portion 3 of the support device according to the present embodiment is configured to be able to be taken in and out with respect to the reaction force securing portion 2.) Next, the front end portion of the support portion 3 on the upper side and the lower side A certain conductive material 31 is connected by a wire 4.
In this way, when the reaction force securing part 2 fixed to the constructed part 21 side and the support part 3 projecting from the constructed part to the expansion region are configured as separate members, the reaction force securing part is provided. And detachable by splitting it with a support part and making a simple connection with bolts, pins, etc., or the support part can be rotated freely with a hinge structure at the tip of the reaction force securing part to the expansion area Of course, various means can be taken, such as a projecting structure.

  At this time, the support portion 3 and the conductive material 31 are connected by the wire 4 so that the lower conductive material 31 is pulled upward (lifted upward) and held at a predetermined target position. In other words, the lower guide is provided by the protruding upper support portion 3 so that the position / posture of the guide material 31 held by the crane 20 until the previous process is maintained as designed even after support by the support device 1. The material 31 is supported so as to be lifted.

  In this way, by lifting the support portion 3 upward (possible either directly above or obliquely above), the conductor 31 can be bent or swayed regardless of the bend or other behavior on the support device 1 side. It is prevented as much as possible, and it becomes possible to hold the conducting material 31 in the target position.

4). Process d (Preparation for placing support pile)
Through the above procedure, as shown in FIG. 2 (d), the conductive material 31 is supported by the support portion 3 protruding in a cantilevered manner above the conductive material 31, and the conductive material is in a predetermined target position. When the state to be held by the cable is secured, the wire from the crane 20 is cut off from the conductive material 31. As a result, loads such as the conductive material 31 and the equipment and scaffold members on it are entrusted to the pier constructed part 21 side.

  Then, when the state in which the conductive material 31 projects from the constructed portion 21 is ensured and the state in which the projected conductive material 31 is supported so as to be lifted upward by the support device 1 can be secured, FIG. As shown in FIG. 3, the upper turning body of the crane 20 is turned backward. Then, a support pile or a drilling device prepared in advance behind the crane 20 is suspended by the crane (see FIG. 15), and preparation for placing the support pile is advanced.

  The support device 1 used in the present embodiment is formed to have a size that does not interfere with the upper swing body of the crane 20 and is attached within a height range that does not interfere with the upper swing body (see FIG. 1), unlike the prior art using a reaction force pole, a reinforcing material, a cable with a cable, etc., an excellent effect is achieved that the operation of the upper swing body of the crane 20 is not hindered at all.

6). Step e (step of placing a support pile through a conductive material supported by an overhanging support device)
When the support pile and drilling device to be driven are suspended by the crane, the crane is swung forward again. Then, as shown in FIG. 2 (e), the drilling device 90 and the support pile 35 suspended by the crane 20 are passed through the pile head fixing pipe 53 of the guide material 31 supported by the support device 1. Proceed with placing while guiding. When the installation of one support pile is completed, the crane is swung backwards, a new support pile is suspended, and it is swung forward again in the same manner (as shown in FIG. 2 (e)). . Such support pile placement is performed a plurality of times. In the case of the present embodiment, every time one conductive material is extended, three support piles are driven side by side.

  When the necessary number of support piles are driven, the pile heads that have been driven are fixed to the pile head fixing pipe 53 of the conductive material 31, and the conductive material 31 and the head of the support pile 35 are integrated. Thereby, the state by which the conducting material 31 was supported by the support pile 35 is ensured, and as a result, the structure constructed | assembled part 21 is extended by one span length. Subsequently, the support device 1 is removed from the existing jetty panel 31 ′, suspended by the crane 20, and advanced toward the conductive material 31 (new jetty panel) at the site expanded this time.

  In this way, by repeating the steps a to e described above, the constructed part composed of the upper structure and the lower structure is gradually expanded (that is, expanded by one span length), and finally, as a completed body The construction of the pier is completed.

(Second Embodiment)
Next, based on FIG. 4, 2nd Embodiment of a support apparatus is described.
In the following description, description of the configuration common to the above-described support device of the first embodiment will be omitted.

  In the first embodiment, the reaction force securing portion 2 fixed to the built-up portion 21 side and the support portion 3 protruding from the built-up portion to the expansion region are configured as separate members. Thus, an integral beam structure in which both are integrated can be employed.

  In the first embodiment, the support portion 3 and the conductive material 31 are simply connected by a wire. However, as shown in FIG. 4, a chain block 5 (a tension means) for pulling up the connected wire is supported. It is also possible to equip part 3.

  As described above, the support device 1 according to the second embodiment has a simple structure in which the reaction force securing portion 2 and the support portion 3 are integrated. Therefore, the support device can be manufactured easily and at low cost. Further, by providing tension means such as a chain block, it is possible to hold the guiding material 31 to be lifted at a predetermined target position regardless of the posture and the deflection of the support portion 3 in the overhanging state.

(Third embodiment)
Next, based on FIG. 5, 3rd Embodiment of a support apparatus is described.

  The support device 1 according to the third embodiment lifts the hydraulic cylinder 10 (push / pull means) for pushing and pulling the substantially beam-shaped support portion 3 and the conductive material 31 below the support portion 3 to the front side. Hydraulic cylinder 12 (lifting means) and a hydraulic unit 14 for operating the hydraulic cylinders 10 and 12, respectively.

  The hydraulic unit 14 is installed at the rear of the reaction force securing unit 2. One end of a plurality of hydraulic hoses (not shown) is connected to the hydraulic unit 14, and the other ends of the hydraulic hoses are individually connected to the hydraulic cylinders 10 and 12, respectively.

  The lateral hydraulic cylinder 10 (hydraulic drive telescopic cylinder) plays a role of pushing and pulling the support portion 3 that can be inserted into and removed from the reaction force securing portion 2 along its longitudinal direction. The base end side of the hydraulic cylinder 10 is fixed to the rear end of the reaction force securing portion 2, and the tip end side of the cylinder rod is fixed to the rear end of the support portion 3.

  The vertical hydraulic cylinder 12 (hydraulic drive telescopic cylinder) is fixed to the distal end side of the substantially beam-shaped support portion 3 and plays a role of lifting the guide 31 below the support portion 3 upward. . The hydraulic cylinder 12 has a cylindrical body fixed to the support portion 3, and a tip end portion of a cylinder rod extending from the support portion 3 is connected to a conductive material 31.

  According to the support device of the third embodiment, the provision of the hydraulic cylinder 10 saves labor for pushing and pulling the support portion 3 made of steel or the like. In addition, since the hydraulic cylinder 12 is provided, it is possible to hold the conducting material 31 at a predetermined target position regardless of the posture and the bending of the support portion 3 protruding above the conducting material 31.

  The lifting hydraulic cylinders to be equipped on the support unit 3 are not limited to one set, and a plurality of sets may be equipped. For example, as shown in FIG. 6, by providing an auxiliary hydraulic cylinder 16 in addition to the hydraulic cylinder 12, safety and stability of the support of the conductive material can be ensured even when the conductive material 31 is heavy, The distortion of the conductive material 31 is prevented as much as possible, and the conductive material can be held at the target position with higher accuracy.

(Fourth embodiment)
Next, a fourth embodiment of the support device will be described based on FIG.

  In the first embodiment described above, the support portion 3 that protrudes from the built-up portion 21 toward the extended region 22 is formed in a horizontal straight line when viewed from the side. However, as shown in FIG. It may be formed by bending or bending so as to be bent obliquely upward as viewed or curved. Alternatively, as shown in FIG. 8, the distal end side of the support portion 3 may be formed in an oblique cut shape so that the support portion distal end does not become an obstacle when the conductive material 31 is lifted obliquely. As shown in FIG. 7 and FIG. 8, when the conductive material 31 is held at a target position with a gradient by the support portion 3 having such a bent shape or a diagonally cut shape, the tip of the support portion 3 is connected to the conductive material 31. Therefore, the conductive material can be held at the intended inclination angle.

(Fifth embodiment)
Next, based on FIG. 9, 5th Embodiment of a support apparatus is described.

  In the support device of the first embodiment described above, as shown in FIG. 3, the support device 3 is configured to be slidable so that the support portion 3 can be taken in and out of the reaction force securing portion 2, but as shown in FIG. 9, The reaction force securing part 2 and the support part 3 are connected by a rotating shaft so that the support part 3 can rotate. With this rotary structure, when the conductive material 31 is installed, the support part 3 is kept in the retracted state on the constructed part 21 side, and the degree of freedom of work in the extended region 22 is increased. It can be secured.

  In addition, since there are conditions such as cutting of adjacent standing trees is not permitted when constructing structures in mountainous areas, in such a case, in the embodiment shown in FIG. There is a risk of being disturbed.

  Therefore, when the construction is performed under such conditions, the support device may be configured such that the support portion 3 rotates inside the work area as shown in FIG. In the embodiment shown in FIG. 10, the support portion 3 is folded 90 degrees inward and stored in an image in which a gate is provided in the width direction. Make it open. According to such an embodiment, since it is not necessary to rotate the support part 3 outside the work area, the rotation operation of the support part 3 is not hindered by the surrounding environment. Work can be secured because it can be deployed using a scaffold.

  As an aspect of the fifth embodiment, a configuration in which the support portion 3 is configured to rotate horizontally as shown in FIGS. 9 and 10 is illustrated. However, when the rotation in the horizontal direction is not possible for some reason (for example, the existing configuration) Of course, the support portion 3 can also be configured to rotate vertically, that is, from bottom to top (or from top to bottom), depending on the construction conditions. .

(Sixth embodiment)
Next, based on FIG. 11, 6th Embodiment of a support apparatus is described.

  In the support device of the sixth embodiment, the reaction force securing portion 2 is fixed to the existing support pile of the constructed portion 21, and the support portion 3 projects from the extended region 22 therefrom. Then, a conductive material 31 is extended above the projecting support portion 3 as shown in the figure. In the present embodiment, a hydraulically driven expansion / contraction cylinder 18 is fixed to the support portion 3, and the guide material 31 protruding above the support portion 3 is lifted and held at a target position.

  Thus, by arranging the support device 1 below the existing jetty panel 31 ′ and the conductive material 31, there is no obstacle on the upper surface side, and the effect of improving workability is achieved.

(Seventh embodiment)
Next, based on FIG. 12, 7th Embodiment of a support apparatus is described.

  In the support device of the seventh embodiment, the tubular reaction force securing portions 2 and 2 are fixed to the existing support pile 35 ′ of the constructed portion 21, and the support portion 3 projects from the expansion region to the extension region. Yes. A conductive material 31 is extended above the projecting support portion 3 as shown in the figure. The extended conductive material 31 is placed on the substantially beam-shaped support portion 3 and supported by the support portion.

(Eighth embodiment)
Next, based on FIG. 13, 8th Embodiment of a support apparatus is described.

  In the support device of the eighth embodiment, the reaction force securing portion 2 is fixed to the side portion of the existing jetty panel 31 ′ of the constructed portion 21, and the support portion 3 projects from the extended region to the extended region. . And the conducting material 31 is extended substantially in parallel with the projecting support part 3. In the present embodiment, the support portion 3 is provided with a connecting portion 7 projecting inside the work area, and is connected and fixed to a conducting material 31 projecting substantially parallel to the supporting portion 3. It is designed to hold in position.

  It should be noted that the target position of the conductive material 31 is held in the mounting portion of the conductive material 3 1 of the support portion 3 of the seventh embodiment and the connecting and fixing portion of the support portion 3 of the eighth embodiment with the conductive material 3 1. Of course, vertical hydraulic cylinders, wire equipment, and the like can be installed.

(Other embodiments)
The above-described embodiments are examples of the embodiments of the present invention, and the present invention can be implemented in various forms. Hereinafter, other embodiments of the present invention will be described.

  In the above-described embodiment, the support device is attached so that the support portion protrudes above the conductive material. However, the positional relationship between the support device and the conductive material is not limited to this, for example, below the conductive material. You may attach a support apparatus so that a support part may protrude in the side. In that case, the support portion may be provided with a telescopic cylinder for lifting the conductive material from the bottom to the top.

  Further, in the above-described embodiment, every time the conductive material is extended, the support device is moved by the crane and fixed to the constructed part as shown in FIG. 2 (a). To do so, the support device may be provided with self-propelled means. For example, a plurality of wheels may be attached to the support device so that they can be slid freely in the expansion direction and the anti-expansion direction when they are not fixed to the existing jetty panel. In this case, track means such as a rail for assisting the sliding of the support device may be laid in advance.

  In the above-described embodiment, the conductive material (pier panel / upper structural component / positioning / guide means) is given as an example of the construction member supported by the support device. However, what can be supported by the support device of the present invention is as follows. However, the present invention is not limited to this, and includes all members, materials, machines, equipment, instruments, tools and other objects necessary for constructing the structure.

  In the above-described embodiment, the case where two support devices are used has been described as an example. However, the number of support devices may be determined as necessary, and when two or more support devices are used, the support devices are supported. In order to reinforce and stabilize the device, they can be connected to each other (for example, connected by a horizontal connecting member or a truss structure).

In the above-described embodiment, the pier construction is given as an example of the structure construction method. However, the application target of the present invention is not limited to the pier construction. It can be widely applied in the field including “construction to be performed”.
For example, after construction of a pier constructed according to the above procedure for pier reinforcement work, also in various construction work related to deadlines, pier foundations, substructures, etc. that are continuously performed, By using this support device, the steel pipe sheet pile conductors and steel pipe sheet piles placed on the side of the pier, steel shell members instead of sheet pile walls, substructures, foundation works, additional construction of various structures and When installing various materials and equipment to be used for expansion work and reinforcement work, depending on the construction situation, the pier, the existing sheet pile wall, the existing steel shell members, etc. should be used flexibly as the constructed parts. These construction members can be supported while being used for a wide range of applications.

DESCRIPTION OF SYMBOLS 1 Support apparatus 2 Reaction force ensuring part 3 Support part 4 Wire (hanging means)
5 Chain block (Tensioning means)
7 Connecting part 10 Hydraulic cylinder (push / pull means / hydraulic drive telescopic cylinder)
12 Hydraulic cylinder (lifting means / hydraulic drive telescopic cylinder)
14 Hydraulic unit 16 Auxiliary hydraulic cylinder (lifting means / hydraulic drive telescopic cylinder)
18 Telescopic cylinder (lifting means)
20 Mobile crane 21 Pier constructed part (structure constructed part / constructed part)
22 Expansion area (part in the middle of construction)
25 Wire 31 Conductor (pier panel / upper structural component / construction member / positioning / guide means)
31 'Existing pier panel (conductor / superstructure member / construction member)
35 Support pile (tubular pile)
35 'Support pile (tubular pile)
41 Reinforcement material 42 Wire 43 Reaction force pole 44 Chain block 51 Main frame 52 Horizontal girder 53 Pile head fixed pipe (pile guide pipe)
55 Connecting member 71 Pier panel 71 ′ Pier panel 73 Support pile (support pile)
90 Drilling device (placement device / construction equipment)

Claims (7)

A method of constructing a structure using a constructed part,
Arranging the construction members in the direction of expansion of the constructed part;
Installing a substantially beam-shaped support device capable of supporting the construction member so as to project in an expanding direction from the constructed part, and
A construction method for a structure, wherein the construction member is supported by the projecting support device.   It is a device used in construction to construct a structure using a constructed part, which is fixed to the constructed part of the structure and projects in the expansion direction from the constructed part of the structure in the middle of construction. A support device configured to support.   A device used in construction to build a structure using a built part, a support part that extends from the built part of the structure in the expansion direction and supports construction members in the middle of the construction, and the structure has been built And a reaction force securing part secured to the part and securing a reaction force for the support part.   The support device according to claim 3, wherein the reaction force securing portion is configured in a substantially beam shape, and is fixed laterally to a constructed part of the structure.   5. The structure according to claim 3, wherein the support portion is configured to protrude above a construction member in the middle of construction and to support the construction member by applying an upward tensile force to the construction member. Support device.   The support device according to any one of claims 3 to 5, wherein the support portion is configured to be movable in a protruding direction and an anti-extending direction.   A construction method for constructing a structure, characterized in that construction is performed using the construction member while the construction member projecting from the constructed part is supported by the support device according to any one of claims 2 to 6.