JP2022128939A - Floor slab installation method - Google Patents

Abstract

To provide a floor slab installation method reduced in construction cost and a construction period required for the installation work of the floor slab.SOLUTION: In a floor slab installation method, multiple precast floor slabs are set on multiple support members. The method comprises: a guide member mounting step of mounting guide members which are extended along the direction of the set floor slabs and guide the moving direction of the floor slabs, to other floor slabs adjacently arranged to the support members supporting the slab members or the floor slabs to be set; a movement step of hanging the floor slabs in a floating-up state from the support members to hanging members arranged straddling on at least two guide members extended in parallel, and moving the floor slabs integrally with the hanging members along the guide members, in a state of a friction reducing member for reducing the friction between the hanging members and the guide members, arranged between the hanging members and the guide members; and an installation step of installing the floor slabs on the support members by separating the floor slabs from the hanging members.SELECTED DRAWING: Figure 7

Description

An embodiment of the present invention relates to a floor slab installation method.

Conventionally, as an example of applying precast floor slabs, there is a retarding pond facility that temporarily stores rainwater. In this case, the retarding pond facility is provided in an underground space formed by excavating the ground. The ground can be used as a park, a parking lot, or the like. The retarding basin facility consists of a plurality of precast floor slabs arranged on a plurality of supporting members arranged at predetermined intervals, and a bottom slab connecting the adjacent supporting members between the bottoms of the supporting members. By providing end walls at both end portions of the support member in the direction in which the floor slabs are arranged, the support member is formed into a box shape having a space for storing rainwater therein.

Generally, in such retarding pond facilities, floor slabs are installed on supporting members by lifting the floor slabs with a heavy machine such as a crane and lowering the floor slabs transported to a predetermined installation position. Therefore, when trying to transport floor slabs over a wide construction area, a large heavy machine or multiple heavy machines that can handle a large work radius are required, which increases construction costs and secures a site for installing heavy machines. was a problem. In addition, the frequent lifting work using heavy machinery required a great deal of labor and a long construction period.

JP-A-2007-23687

The present invention has been made in view of the above circumstances, and its object is to provide a floor slab installation method that can reduce the construction cost and shorten the construction period required for the installation work of the floor slab. .

A floor slab installation method according to an embodiment is a method of arranging and installing a plurality of precast floor slabs on a plurality of supporting members arranged at predetermined intervals. A guide member that extends along the direction in which the floor slabs are arranged and guides the movement direction of the floor slabs to the support member that is installed or another floor slab that is placed adjacent to the floor slab that is to be installed. a guide member mounting step for mounting the floor slab on a suspension member disposed across at least two guide members extending in parallel while being suspended from the support member, and the suspension member and the guide The floor slab is moved integrally with the suspension member along the guide member in a state in which a friction reduction member that reduces friction between the suspension member and the guide member is disposed between the floor slab and the member. and an installation step of separating the floor slab from the suspension member and installing the floor slab on the support member.

Front cross-sectional view showing an example of a retarding pond to which a floor slab according to one embodiment is applied Side cross-sectional view showing an example of a retarding pond to which a floor slab according to one embodiment is applied A diagram showing an example of a work flow of floor slab installation work according to one embodiment. A diagram showing an example of a state in which a guide member is attached and a floor slab and suspension members are transported in a floor slab installation method according to an embodiment. FIG. 2 is an enlarged view showing an example of a state in which a floor slab and a suspension member are placed with a friction reduction member provided on a guide member, in a floor slab installation method according to an embodiment; FIG. 2 is a perspective view showing an example of a state in which a floor slab and suspension members are connected to each other in a floor slab installation method according to an embodiment; Fig. 2 shows an example of a floor slab installation method according to an embodiment, in which a crane lifts a load and a floor slab pull-in operation is performed by a hoist. FIG. 7 shows a floor slab installation method according to an embodiment along the line X8-X8 in FIG. 7 and shows an example of the floor slab pulling-in operation by a hoist. FIG. 1 shows an example of a state in which a floor slab is installed on a support member in a floor slab installation method according to an embodiment (part 1); Fig. 2 shows an example of a state in which a floor slab is installed on a support member in a floor slab installation method according to an embodiment (part 2); Fig. 3 shows an example of a state in which a floor slab is installed on a support member in a floor slab installation method according to an embodiment (No. 3); Another example of the friction reducing member is shown for the floor slab installation method according to one embodiment, and an enlarged example of a state in which the friction reducing member is provided on the guide member and the floor slab and suspension member are placed. Figure equivalent to Figure 5 Fig. 10 shows another example of a floor slab installation method according to an embodiment, in which a friction reducing member is provided on a guide member and a floor slab and a suspension member are placed, and the guide member is adjacent to the floor slab. Fig. 5 equivalent view when attached to another floor slab FIG. 11 is a diagram showing another example of the floor slab pulling-in operation in the floor slab installation method according to the embodiment; FIG. 14 shows a floor slab installation method according to an embodiment along the line X15-X15 in FIG. 14 and shows another example of the floor slab pulling-in operation. Diagram showing an example of a retarding pond to which floor slabs are applied when shoring is installed in the conventional configuration An example of a retarding pond to which floor slabs are applied when shoring in a conventional configuration is provided is shown along line X17-X17 in FIG.

An embodiment will be described below with reference to the drawings. In this embodiment, a retarding pond facility, which is an example of a floor slab application target, will be described. In addition to the retarding basin facilities, floor slabs are applied to facilities such as irrigation facilities and regulating ponds, but are not limited to these.

A first embodiment will be described with reference to FIGS. 1 to 11. FIG. The retarding pond facility 1 shown in FIG. 1 is an application example of the floor slab 20 . The retarding pond facility 1 is an artificial structure capable of temporarily storing rainwater and the like, and is configured, for example, in a quadrangular shape in plan view. In this case, the retarding pond facility 1 is provided in an underground space formed by excavating the ground 2 . The ground is used as a park, playground, parking lot, and the like. In this embodiment, the vertical direction of the retarding pond facility 1 is defined as the vertical direction with respect to the direction of gravity when the retarding pond facility 1 is installed in FIG. Further, the direction perpendicular to the up-down direction of the retarding pond facility 1 on the paper surface of FIG. Further, the direction perpendicular to the vertical direction of the retarding pond facility 1 on the paper surface of FIG.

The retarding pond facility 1 includes support members 10 , floor slabs 20 , bottom slabs 31 , end walls 32 , and water passages 33 . The support member 10 is made of, for example, precast and formed into a columnar shape as a whole. Further, the support member 10 has an end support member 11 and an intermediate support member 12 . The end support members 11 are installed at the ends of the retarding pond facility 1 in the left-right direction. A plurality of end support members 11 are connected in the front-rear direction of the retarding pond facility 1 . Further, the end support member 11 has an end body portion 111 and an end installation portion 112 . The end main body 111 is formed to have an L-shaped cross section taken in the vertical direction, for example. The end setting portion 112 is formed near the upper end portion of the end support member 11 and protrudes toward the central portion in the horizontal direction of the retarding pond facility 1 . The end installation portion 112 has, for example, a trapezoidal cross-section taken in the vertical direction.

The intermediate support members 12 are arranged continuously with a predetermined interval between the opposing end support members 11 . A plurality of intermediate supporting members 12 are connected in the front-rear direction of the retarding pond facility 1 . In this case, as shown in FIG. 2, the intermediate supporting members 12 are alternately reversed in the front-rear direction. Further, the intermediate support member 12 has a body portion 121 and an installation portion 122 . The body portion 121 has, for example, a vertically inverted T-shaped cross section taken in the vertical direction. The installation portion 122 is formed in the vicinity of the upper end portion of the intermediate support member 12 , and protrudes to both sides of the intermediate support member 12 with the body portion 121 interposed therebetween in the left-right direction. The installation portion 122 has, for example, a trapezoidal cross section cut in the vertical direction. The end support member 11 and the intermediate support member 12 may be members having, for example, a rectangular frame-like cross-section cut in the vertical direction, and the shape thereof is not limited to the illustrated one.

The floor slab 20 is, for example, precast and formed in a rectangular plate shape. In this case, the floor slab 20 has a thickness of approximately 300 mm, a width of approximately 3,000 to 4,000 mm, a length of 1,500 to 2,000 mm, and a mass of approximately 3,000 to 6,000 kg. A plurality of floor slabs 20 are arranged side by side on support members 10 connected in the front-rear direction of the retarding pond facility 1 . Specifically, the floor slabs 20 are installed between the installation portions 122 that face each other, and between the installation portion 112 for the end portion and the installation portion 122 that faces the installation portion 112 for the end portion. When the floor slab 20 is installed, the upper surface of the floor slab 20 is located above the upper end portion of the support member 10 as shown in FIG. 1 and the like. That is, the thickness dimension of the floor slab 20 is the dimension from the upper surface of the end installation portion 112 to the upper end portion of the end support member 11, and the dimension from the upper surface of the installation portion 122 to the upper end portion of the intermediate support member 12. It consists of dimensions that are larger than the dimensions of

In addition, gaps between the adjacent floor slabs 20 and between the floor slabs 20 and the upper surface of the end support member 11 are filled with a filler such as mortar (not shown). As a result, the entire upper surface of the retarding pond facility 1 is covered with the floor slabs 20 being flush with each other and connected.

The floor slab 20 has an insert 21 as a member to be connected. The inserts 21 are provided on the upper surface of the floor slab, as shown in FIG. In addition, the insert 21 is internally threaded on its inner peripheral surface.

The bottom plate 31 is formed in a rectangular shape in a plan view, and is provided between the bottom portions of the opposing support members 10 . The bottom plate 31 is for connecting the adjacent support members 10 . The bottom slab 31 is formed by arranging reinforcing bars (not shown) and then pouring concrete.

The end walls 32 are provided at both ends in the front-rear direction of the retarding pond facility 1, that is, at both ends in the direction in which the floor slabs 20 are arranged. The end wall 32 is formed by assembling a form (not shown), placing reinforcing bars (not shown) in a space within the form, and then pouring concrete. The end wall 32 covers the side surface of the space formed by the support member 10 , the floor slab 20 and the bottom slab 31 . Thus, the retarding pond facility 1 is formed into a box shape by the support members 10, the floor slab 20, the bottom slab 31, and the end walls 32. As shown in FIG.

The water flow port 33 is an opening formed between the intermediate support members 12 connected in the front-rear direction of the retarding pond facility 1, as shown in FIG. The water passage port 33 is for passing water between the connected intermediate support members 12 .

Next, a construction method for installing the floor slab 20 on the support member 10 will be described with reference to FIGS. 3 to 11 as well. Note that the white arrows in the drawing indicate the moving direction of each member during each step. Moreover, the support member 10 shown in FIG. 4 and the like is assumed to have already been installed and fixed to a base or the like (not shown) in a process prior to the work process shown in FIG. Furthermore, in this embodiment, the floor slab 20 may be installed between the opposing intermediate support members 12 or between the end support member 11 and the intermediate support member 12. 20 is installed in the same manner. Therefore, an example in which the floor slab 20 is installed between the opposing intermediate support members 12 will be described below.

When installing the floor slab 20 on the intermediate support member 12, the operator first performs the guide member mounting process as shown in step S11 of FIG. As shown in FIG. 4(A), the guide member mounting step is to extend along the direction in which the floor slabs 20 are arranged on the intermediate support members 12 that support the floor slabs 20 to be installed. This is the step of attaching the guide member 41 that guides the movement direction. The guide member 41 can be made of C-steel, for example. In this case, the guide member 41 has a groove portion 411 . The groove portion 411 is formed in a concave shape along the direction in which the guide member 41 extends.

Further, the guide member 41 is temporarily fixed to the top surface of the main body portion 121, for example. Here, the temporary fixation means that the guide member 41 is arbitrarily fixed with such a strength that the guide member 41 does not come off from the main body portion 121 when the friction reduction member 60 is moved within the guide member 41 in the moving step described later. means to fix it in such a manner that it can be removed from the main body part 121 . As a temporary fixing method, for example, an insert nut (not shown) is embedded in the top surface of the main body 121, and a bolt passed through the guide member 41 is screwed into the insert nut to removably fix it. It is conceivable to embed a metal plate (not shown) in the groove and fix the guide member 41 to the plate by spot welding so that it can be removed.

Next, the operator performs a connection step in step S12 of FIG. The connecting step is a step for connecting and fixing the floor slab 20 and the hanging member 50, as shown in FIG. Note that the connection process is not limited to being performed after the guide member mounting process, and may be performed before the guide member mounting process or simultaneously with the guide member mounting process.

The hanging members 50 are made of steel materials such as flat steel, H-shaped steel, and L-shaped steel, and in this case, two are provided in parallel along the longitudinal direction of the floor slab 20 . The suspension member 50 has a function of suspending the floor slab 20 while being connected to the floor slab 20, and has rigidity to the extent that the floor slab 20 is not plastically deformed in a suspended state. Moreover, the length dimension of the suspension member 50 is set to be longer than the dimension of the floor slab 20 in the longitudinal direction.

As shown in FIGS. 4 and 6 , the hanging member 50 has a through hole 51 , a connecting member 52 and an elevating member 53 . The through hole 51 is provided at a position corresponding to the insert 21 of the floor slab 20 . The through hole 51 is formed through a portion of the hanging member 50 in the thickness direction.

The connection member 52 is provided at a position corresponding to the insert 21 of the floor slab 20 . The connection member 52 can be composed of a bolt 521 and a nut 522, for example. The bolts 521 are provided so as to pass through the through holes 51 and protrude on both sides of the suspension member 50 in the thickness direction. Moreover, the bolt 521 is formed in a shape corresponding to the insert 21 . In other words, the bolt 521 is configured to fit into the insert 21 and is detachably connected to the insert 21 .

In this case, the bolt 521 is configured with, for example, a right-hand thread, and when the nut 522 is fixed, turning it clockwise advances it downward, and turning it counterclockwise advances it upward. The floor slab 20 and the suspension member 50 are connected and fixed by fastening the bolts 521 to the inserts 21 .

The nut 522 is configured to be fittable on the bolt 521 . The nut 522 functions as a stopper for the bolt 521 from the through hole 51 by being screwed onto the bolt 521 while the bolt 521 is attached to the insert 21 . In addition, the bolt 521 and the nut 522 can be composed of general-purpose products.

The lifting member 53 is provided at a position corresponding to the connecting member 52 as shown in FIG. 5 and the like. The elevating member 53 is for moving the floor slab 20 vertically relative to the suspension member 50 in a state where the connecting member 52 and the insert 21 are connected. In this embodiment, the lifting member 53 is configured by a jack such as a center hole jack (registered trademark) or a PC jack, and is configured so that the bolt 521 can pass therethrough. In this case, the lifting member 53 is provided between the hanging member 50 and the nut 522 , and moves the floor slab 20 vertically relative to the hanging member 523 according to the vertical movement of the lifting member 53 . can be moved.

In addition, as shown in FIG. 5 , a plate 54 can be installed between the lifting member 53 and the nut 522 and above the lifting member 53 . The plate 54 is made of flat steel, for example, and its outer diameter is set larger than the outer diameter of the nut 522 . Thereby, the load from the lifting member 53 can be uniformly applied to the nut 522 via the plate 54 .

Next, in step S13 of FIG. 3, the worker performs a lifting process. In the lifting process, as shown in FIGS. 4B and 7, a crane 70 lifts the floor slab 20 and the suspension member 50 via an eyenut and a lifting wire rope 71 (not shown) and transports them. In this case, in FIG. 7, an imaginary line indicating the locus of movement of the crane 70 is indicated by a chain double-dashed line. Moreover, the lifting process may be performed after the connecting process, or may be performed before the connecting process. In other words, the floor slab 20 integrated by the connecting step and the suspension member 50 are not limited to being transported onto the guide member 41, but the floor slab 20 is transported to the installation section 122, and then the suspension member 50 is transferred to the guide member. The structure may be such that the floor slab 20 and the suspension member 50 are connected after being conveyed onto the floor 41 .

Next, in step S14 of FIG. 3, the worker executes the moving process. In the moving step, as shown in FIG. 4(C), the floor slab 20 is suspended from the intermediate support member 12 on the suspension member 50 arranged across at least two guide members 41 extending in parallel. It is also a step of moving the floor slab 20 integrally with the suspension member 50 along the guide member 41 while the friction reduction member 60 is arranged between the suspension member 50 and the guide member 41 .

The friction reduction member 60 has a function of reducing friction between the suspension member 50 and the guide member 41 when the suspension member 50 is horizontally moved along the direction in which the guide member 41 extends. In this embodiment, as shown in FIG. 7 and the like, the friction reduction members 60 are provided near the ends of the plurality of hanging members 50 in the longitudinal direction. In this embodiment, the friction reduction member 60 is previously arranged on the guide member 41 before the moving process. The friction reduction member 60 is not limited to being arranged on the guide member 41 in advance before the moving process, and may be attached to the suspension member 50 before the lifting process.

In the case of this embodiment, as shown in FIG. 5, the friction reduction member 60 is composed of, for example, a carrier vehicle such as a chill roller. The friction reduction member 60 has a base member 61 and roller members 62 . The base member 61 is composed of, for example, a member having high rigidity, and is configured to be able to support the suspension member 50 . In this specification, high rigidity means rigidity to the extent that the floor slab 20 is not crushed even when placed thereon, and the required performance may vary depending on the weight of the floor slab 20 or the like.

The roller member 62 is attached to the base member 61 and is configured to be rotatable at least in the width direction of the floor slab 20 , that is, the moving direction, in a state where the suspension member 50 is connected to the floor slab 20 .

During the moving process, the floor slab 20 and the intermediate support member 12 are not in contact with each other because the friction reduction member 60 is provided between the suspension member 50 and the guide member 41 . In this case, as shown in FIG. 5, the dimension H between the floor slab 20 and the installation portion 122 of the intermediate support member 12 is set to be approximately 20 to 30 mm.

Moreover, as shown in FIG. 5 , when the friction reduction member 60 is placed on the guide member 41 , at least a part of the friction reduction member 60 in the vertical direction is accommodated in the groove portion 411 . That is, the vertical dimension of the friction reducing member 60 is set to be larger than the vertical dimension of the groove portion 411 . Furthermore, the lateral dimension of the friction reducing member 60 is set to be slightly smaller than the lateral dimension of the groove portion 411 . Thereby, the friction reduction member 60 is accommodated within the inner peripheral wall of the groove portion 411 .

As shown in FIG. 12, the friction reducing member 60 is not limited to the integral configuration of the base member 61 and the roller member 62 described above, and the two may be separate members. In this case, in the example of FIG. 12, the friction reduction member 60a can be configured by a base member 61a and a roller member 62a. The base member 61a is made of, for example, a thick steel plate, and is fixed to the suspension member 50 by, for example, welding.

The roller member 62a can be composed of a spherical member or a tubular member having high rigidity, for example, made of steel, resin, or ceramic. A steel ball, for example, can be used as the spherical member, and a single pipe can be used as the tubular member.

The plurality of roller members 62a are arranged on the guide member 41 in advance before the lifting process in the installation work of the floor slab 20, so that the space between the suspension member 50 and the guide member 41 during the moving process is reduced. It exhibits the function of reducing friction. Thus, by forming the roller member 62a from relatively inexpensive steel balls or the like, it is possible to reduce the material cost of the friction reducing member 60a, and as a result, it is possible to reduce the construction cost. The base member 61a may be omitted by setting the vertical dimension of the roller member 62a to be larger than the vertical dimension of the groove portion 411 so that the roller member 62a is brought into direct contact with the suspension member 50. .

In the moving step, as shown in FIGS. 7 and 8, a hoist 72 such as a lever hoist is installed on the top surface of the intermediate support member 12, and a horizontal pulling wire rope 73 connected to the hoist 72 is pulled. It is attached to the hanging member 50 or the floor slab 20 . For example, when a worker riding on the aerial work vehicle 74 operates the hoist 72 , the roller member 62 rotates along the direction in which the guide member 41 extends, thereby lifting the suspension member 50 and the floor slab 20 . is pulled in and conveyed to the installation position of the floor slab 20.例文帳に追加

Next, the worker performs the installation process in step S15 of FIG. The installation process is a process of separating the floor slab 20 from the suspension member 50 and installing the floor slab 20 on the intermediate support member 12, as shown in FIGS. In this embodiment, as shown in FIG. 9(A), the floor slab 20 transported to a predetermined installation position is targeted, and the operator operates the lifting member 53 as shown in FIG. 9(B). The floor slab 20 is lowered to install the lower surface of the floor slab 20 on the installation portion 122 .

Next, as shown in FIG. 10(A), the floor slab 20 is arranged with respect to the intermediate support member 12 by turning the bolt 521 counterclockwise and removing it from the insert 21. be. Then, the operator repeats the connection process (step S12), the lifting process (step S13), the moving process (step S14), and the installation process (step S15) in FIG. 3 in order. Then, the worker installs a predetermined number of floor slabs 20 on the intermediate support member 12, and removes the guide member 41 and the friction reduction member 60 from the intermediate support member 12 as shown in FIG. 10(B).

Further, the installation process includes filling the insert 21 with mortar 80, as shown in FIG. Thus, by filling the inserts 21 with the mortar 80 while the floor slab 20 is installed, the inserts 21 are not exposed to the outside. can ensure the integrity of the When the filling operation of the mortar 80 is completed, the installation of the floor slab 20 on the intermediate support member 12 is completed (end in FIG. 3).

In the guide member mounting step, the guide member 41 can be configured to be mounted on another floor slab 20a arranged adjacent to the floor slab 20 to be installed, as shown in FIG. In this case, in the example of FIG. 13, the guide member 41 is fixed to the upper surface of another floor slab 20a that has already been placed. Thereby, the operator can select the installation position of the guide member 41 on either the top surface of the intermediate support member 12 or the top surface of another floor slab 20a that has already been installed. That is, the installation position of the guide member 41 can be selected in consideration of workability and construction safety. As a result, the construction efficiency of the entire installation work of the floor slab 20 can be improved.

In the moving step, as shown in FIGS. 14 and 15, the floor slab 20 can be transported using an electric device 75 such as an electric winch. In this case, in the example of FIGS. 14 and 15, when the horizontal pulling wire rope 73 connected to the electric device 75 is attached to the suspension member 50 or the floor slab 20 and the electric device 75 is driven, the guide member 41 extends. By rotating the roller member 62 along the direction, the hanging member 50 and the floor slab 20 are pulled in and conveyed to the installation position of the floor slab 20 . As a result, the installation work of the floor slab 20 is performed by the electric device 75, thereby reducing the work load.

According to the embodiment described above, the method of installing the floor slabs 20 is a method of arranging and installing a plurality of precast floor slabs 20 on a plurality of support members 10 arranged at predetermined intervals. A member mounting process, a moving process, and an installation process are provided. In the guide member mounting step, the floor slab 20 is arranged on the support member 10 that supports the floor slab 20 to be installed or another floor slab 20a that is arranged adjacent to the floor slab 20 to be installed. It is a step of attaching a guide member that extends along the direction and guides the moving direction of the floor slab 20 .

In the moving step, the floor slab 20 is suspended from the support member 10 on the suspension member 50 arranged across at least two guide members 41 extending in parallel, and the suspension member 50 and the guide member 41 are suspended. In this step, the floor slab 20 is moved integrally with the suspension member 50 along the guide member 41 with the friction reduction member 60 disposed therebetween. The friction reduction member 60 has a function of reducing friction between the suspension member 50 and the guide member 41 . The installation process is a process of separating the floor slab 20 from the suspension member 50 and installing the floor slab 20 on the support member 10 .

Here, in the conventional configuration, when the retarding basin 1a is installed in the underground space formed by excavating the ground, as shown in FIG. may occur. Since the shoring 90 has a well-known structure, a detailed description thereof will be omitted, but it is composed of members such as an earth retaining wall 91, a wale 92, a strut 93, a support 94, and the like. When constructing the retarding pond 1a, the support member 10a is installed on the base surface after the shoring 90 is installed, and then the floor slab 20b is arranged.

In this case, when the floor slab 20b is arranged at the predetermined installation position of the support member 10a by the crane 70, the struts 93 may interfere with each other as shown in FIGS. In this case, since the floor slab 20b cannot be installed by the crane 70, the floor slab 20b has to be placed without using the crane 70, resulting in a great deal of labor and work load. 16 and 17, the imaginary line of the floor slab 20b to be installed is indicated by a chain double-dashed line.

Therefore, in the present embodiment, the floor slab 20 can be moved integrally with the suspension member 50 along the guide member 41 in the moving step. According to this, after the floor slab 20 is temporarily placed by the crane 70 at a position where it does not interfere with the struts 93 and the like, the floor slab 20 can be pulled and moved to a predetermined installation position. Therefore, it is possible to reduce the labor and work burden of installing the floor slab 20 at a predetermined installation position.

Since it is not necessary to directly install the floor slab 20 by the crane 70, even if the installation position of the floor slab 20 is far away from the installation location of the crane 70, for example, a large-sized crane can be used to increase the transportation distance. crane 70 need not be installed. Thereby, reduction of construction cost can be aimed at. In addition, since the transport distance of the floor slab 20 by the crane 70 can be shortened as much as possible, the time required for the lifting work of the crane 70 can be shortened, and as a result, the construction period can be shortened.

Further, the floor slab 20 is provided with a plurality of connected members 21 on its upper surface. The hanging member 50 is provided with a connecting member 52 formed in a shape corresponding to the connected member 21 at a position corresponding to the connected member 21 . The installation method of the floor slab 20 further includes a connecting step of connecting and fixing the floor slab 20 and the hanging member 50 by attaching the connection member 52 to the connected member 21 . According to this, the connection between the suspension member 50 and the floor slab 20 is maintained by a simple structure in which the connection member 52 provided on the suspension member 50 is attached to the connected member 21 formed on the floor slab 20. can do.

Further, the guide member 41 has a groove portion 411 formed along the direction in which the guide member 41 extends. At least part of the friction reduction member 60 is accommodated in the groove portion 411 . According to this, by accommodating the friction reduction member 60 in the groove portion 411 of the guide member 41 , the movement direction of the friction reduction member 60 within the guide member 41 can be restricted. As a result, the floor slabs 20 and the suspension members 50 can be smoothly transported in the direction in which the guide members 41 extend, that is, in the direction in which the floor slabs 20 are arranged.

The friction reducing member 60 also has a roller member 62 that can rotate at least in the moving direction of the floor slab 20 in a state where the suspension member 50 is connected to the floor slab 20 . According to this, when the floor slab 20 is transported to the predetermined installation position, the suspension member 50 and the floor slab 20 are drawn in by rotating the roller member 62, thereby smoothly transporting the floor slab 20. can do.

In addition, the friction reduction member 60 can be composed of a spherical body having high rigidity. According to this, the floor slab 20 and the hanging member 50 can be smoothly transported using general-purpose items such as steel balls. Thereby, the reduction of construction cost can be aimed at.

Although the embodiment of the present invention has been described above, this embodiment is presented as an example, and is not limited to the embodiments described above and described in the drawings, and is within the scope of the invention. can be changed as appropriate.

10 is a support member, 20 is a floor slab, 20a is another floor slab, 21 is a connected member, 41 is a guide member, 411 is a groove portion, 50 is a suspension member, 52 is a connection member, 60 is a friction reduction member, 62 indicates a roller member.

Claims (5)

A method of arranging and installing a plurality of precast floor slabs on a plurality of support members arranged at predetermined intervals,
The support member that supports the floor slab to be installed or another floor slab that is arranged adjacent to the floor slab to be installed extends along the direction in which the floor slab is arranged. a guide member attaching step of attaching a guide member for guiding the moving direction of the floor slab;
The floor slab is suspended from the support member by a suspension member disposed across at least two guide members extending in parallel, and the suspension is provided between the suspension member and the guide member. a moving step of moving the floor slab integrally with the suspension member along the guide member in a state where a friction reduction member for reducing friction between the member and the guide member is arranged;
an installation step of separating the floor slab from the suspension member and installing the floor slab on the support member;
A floor slab installation method. The floor slab is provided with a plurality of connected members on its upper surface,
The suspension member is provided with a connection member formed in a shape corresponding to the connection member at a position corresponding to the connection member,
further comprising a connecting step of connecting and fixing the floor slab and the hanging member by attaching the connecting member to the connected member;
The installation method of the floor slab according to claim 1. The guide member has a groove formed along the direction in which the guide member extends,
At least part of the friction reduction member is accommodated in the groove,
The floor slab installation method according to claim 1 or 2. The friction reduction member has a roller member rotatable at least in the moving direction of the floor slab in a state where the suspension member is connected to the floor slab.
The floor slab installation method according to any one of claims 1 to 3. The friction reduction member is composed of a sphere having high rigidity,
The floor slab installation method according to claim 4.

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