JPH11222909A - Work execution method of precast box culvert by fluid caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work execution method by fluid casters, making precast box culverts movable at any one of a straight part, a curved part and a bent part in moving the precast box culverts of heavy weight into laying positions and making jointing-connecting work positively executable in an installation position. SOLUTION: A work execution method of precast box culvets 4 by fluid casters 30 comprises a process of forming a track face into a smooth face up to the laying position of the precast box culverts 4, a process of disposing the fluid casters 30 at the lower faces of the precast box culverts 4 on the track face, and a process of moving the precast box culverts 4 on the track face by the fluid casters 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transporting a precast box culvert for use in a common gutter or a sewerage work to a laying position and installing the precast box culvert in a fixed position using a fluid caster. The present invention relates to a construction method using a fluid caster of a precast box culvert which can be suitably used for construction in a case where it is difficult to perform construction using a culvert hoist. In this specification, the term “precast box culvert” refers to a hollow frame having a predetermined length (including one further divided into a plurality of frames) regardless of its external shape.

[0002]

2. Description of the Related Art Conventionally, a plurality of precast box culverts are laid in tandem to form culverts such as sewers, common ditches, and underpasses. In the laying and installation work of such a precast box culvert, various transportation means are adopted, but when large machines such as cranes cannot be used due to construction conditions at the site,
Using a roller using a hard sphere (for example, a pachinko ball)
This is done by installing them individually at the laying place.

[0003] However, being in a narrow mine,
Since human power is required, the installation from the transport to the laying position requires a considerable amount of labor, and there is a drawback in terms of workability.

Further, in the case of laying at the installation position, the use of rollers makes the degree of freedom in the conveying direction relatively large and does not hinder the operation. Since it requires an operation of moving using, there is a problem that labor is required similarly to the above and accurate positioning is impossible.

In view of the above, various techniques have been conventionally proposed as a vertical drawing construction method of a precast box culvert. For example, a BCCS method (Japanese Patent Publication No. 2-3509) has been proposed.
No. 5, Japanese Utility Model Publication No. 1-182525), a precast box culvert bogie laying method is known.

In the technique referred to as the BCCS method, a precast box culvert is moved and transported to a laying position by a self-propelled bogie, and vertical adjustment is performed by a hydraulic jack stroke, and horizontal adjustment is performed by a slide mechanism. This is a method of installing a precast box culvert.

[0007]

The above-mentioned BCCS method is:
In order to use a self-propelled trolley, it is possible to move the precast box culvert for construction on straight sections and curved sections, but in the construction process, pass through curved parts instead of curves (transportation) It is very difficult to perform the construction, and the construction using a trolley is practically impossible.

Further, in the conventional technique, it is necessary to move the precast box culverts one by one and perform a connecting operation with the precast box culverts already constructed. Needed. That is, in the conventional method, it was also difficult to vertically move a plurality of precast box culverts at once.

An object of the present invention is to move a heavy precast box culvert to a laying position.
An object of the present invention is to provide a construction method using a fluid caster of a precast box culvert which can be moved at any of a straight portion, a curved portion, and a bent portion, and can be securely joined and connected at an installation position.

[0010] Another object of the present invention is to provide a method of performing a precast box culvert using a fluid caster, in which the precast box culvert can be moved from one to a plurality at a time to improve the efficiency of the precast box culvert. To provide.

Still another object of the present invention is to provide a fluid caster for a precast box culvert in which a plurality of precast box culverts are divided into blocks so that the blocks can be connected one after another at construction sites to improve workability. It is to provide a construction method by.

[0012]

According to the first aspect of the present invention, there is provided a method of constructing a precast box culvert using a fluid caster, wherein a smooth raceway surface is formed up to a laying position of the precast box culvert. And a step of disposing a fluid caster on the lower surface of the precast box culvert on the track surface, and a step of moving the precast box culvert on the track surface by the fluid caster, Will be resolved.

According to the second aspect of the present invention, in the method for constructing a precast box culvert using a fluid caster, a step of laying the precast box culvert in a pit, and a track having a smooth surface up to a laying position of the precast box culvert. Forming a surface;
Disposing a fluid caster on the lower surface of the precast box culvert on the raceway surface, moving the precast box culvert on the raceway surface by the fluid caster; and This problem can be solved by a configuration including a connecting step of completely connecting the precast box culvert and a step of removing the fluid casters and filling the space between the precast box culvert and the placement surface with a filler. .

As described above, according to the first and second aspects of the present invention, the use of the fluid caster allows not only the movement of the precast box culvert with a small force but also the straight part and the curved part during the movement. Even if there is a bent portion, a bent portion, or the like, it can be installed.

According to a third aspect of the present invention, in the method of constructing a precast box culvert using a fluid caster, a step of laying the precast box culvert in a pit, and connecting a plurality of the built-in precast box culverts by connecting means. Blocking, forming a smooth track surface up to the laying position of the precast box culvert, and arranging a fluid caster on the lower surface of the blocked precast box culvert on the track surface Moving the precast box culvert blocked by the fluid caster on the raceway surface; and joining the moved precast box culvert to the precast box culvert that has already been moved by the joining means. And a connecting step of connecting the precast box culvert to the installed precast box culvert after the joining, and a step of removing a fluid caster and filling the space between the precast box culvert and the arrangement surface with a filler. Is solved by

According to the second or third aspect of the present invention, it is possible to perform the work at the erected place in the mine, the moving work, and the joining / connecting work in parallel, thereby significantly improving the working efficiency. It becomes possible.

According to the third aspect of the present invention, it is possible to block a plurality of precast box culverts and perform the work at one time, and it is possible to greatly improve construction efficiency.

According to the third aspect of the present invention, a plurality of rotators are disposed on the ground side at positions where the blocks are to be formed, and a guide roller is disposed at an upper position outside the rotators, and the precast erected in the pit. It is preferable that the box culvert is supported by a plurality of rotating bodies and a fluid caster is disposed in a gap between the rotating bodies and the ground. With this configuration, it is easy to block a plurality of precast box culverts, and work efficiency is improved.

Further, it is preferable that a guide roller is provided on the fluid caster, and the guide roller is guided to the base (ground) side to prevent the precast box culvert from swaying.

As described above, the traveling guide can be provided between the fluid caster and the foundation side, and the provision of the guide rollers prevents the precast box culvert from swaying laterally and allows the precast box culvert to smoothly pass through the corner bent portion. It becomes possible.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The members, arrangement, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made within the scope of the present invention.

FIGS. 1 to 15 show an embodiment of the present invention. FIG. 1 is a flow chart of the construction method, FIG. 2 is a conceptual diagram of the construction method, and FIG. FIG. 4 is a partial explanatory view showing a state in which a fluid caster is inserted in a state where the fluid caster is inserted, and FIG. 4 is a partial explanatory view showing a state immediately after the fluid caster is operated after FIG. 3, and FIG. FIG. 6 is a partial explanatory view showing a state in which a box culvert is floated, FIG. 6 is a partial explanatory view showing an arrangement state of a rotating body and a guide, FIG. 7 is an explanatory view showing an installed state of a precast box culvert, and FIG. FIG. 9 is an explanatory diagram showing a state where the culvert is blocked, and FIG. 9 is an explanatory diagram showing another configuration of the fluid caster, the raceway surface, and the precast box culvert. 0 is an explanatory view showing the configuration of still another fluid caster, a raceway surface, and a precast box culvert. FIG. 11 is a partial explanatory view showing a state in which a guide roller is provided on the fluid caster. FIG. FIGS. 13 to 15 are views showing an example of the movement in the corner folding part when the user performs the operation.
13 shows an embodiment of a fluid caster, FIG. 13 is a partially cutaway explanatory view of a fluid caster, FIG. 14 is an explanatory view of operation, FIG. 15 is a schematic configuration diagram of a control system, and FIGS. FIG. 20 is a partially cut-away side view of a connection device, and FIG. 21 is a taper of a female connector and a male connector showing another embodiment using an elastic filler as an elastic body. FIG. 22 is a cross-sectional view of the engagement claw position, and FIG. 23 is an explanatory view of a prismatic engagement claw.
(A) is a side view, (B) is a plan view, and FIG. 24 shows another embodiment of the installation work.

According to the first aspect of the present invention, in the method of applying the precast box culvert 4 using the fluid casters 30, the step of forming the raceway surface 10 having a smooth surface (skid surface) up to the laying position of the precast box culvert 4 is provided. And a step of disposing the fluid casters 30 on the lower surface of the precast box culvert 4 on the raceway surface 10, and a step of moving the precast box culvert 4 on the raceway surface 10 by the fluid casters 30.

Although an air caster is used as the fluid caster 30 in this embodiment, a water caster may be used as the fluid caster 30. Then, the precast box culvert 4 is moved by the fluid caster 30 in the underground 11, and at this time, the track surface 10 as a skid surface is formed in the moving range of the fluid caster 30. In this example, a thin galvanized steel plate 2 is laid on the foundation concrete 1 as the raceway surface 10. The joint portion of the thin galvanized sheet 2 is cured with an adhesive tape or the like (not shown) so as not to generate an adverse frictional resistance when the fluid caster 30 passes.

Next, on the raceway surface 10, fluid casters 30 are inserted and arranged at the four lower corners of the precast box culvert 4. In this example, in order to increase the height of the precast box culvert 4 by the fluid casters 30 in the arrangement of the fluid casters 30, a plurality of concrete panels 3 are arranged on the upper surface of the fluid casters 30.

As shown in FIGS. 13 to 15, the fluid caster 30 of this embodiment includes a carriage 31, a donut-shaped hollow bag 32, a control valve section 33, a fluid storage section 34, a piping hose 35, A pump 37 and a control device are provided.

The carriage 31 of this embodiment holds a bag 32 described below, and this embodiment shows an example in which four bags 32 are arranged on one carriage 31. The bag 32 of this example is attached to a support plate 42 provided with a protruding disk 41 whose lower center protrudes in a disk shape. The protruding disk 41 of the support plate 42 is located in the central space of the bag 32. It is attached.

The support plate 42 is formed in a honeycomb shape as shown in FIG. 13, and has a fluid intake 44 formed in one direction. The fluid intake 44 is formed below the support plate 42. It is connected to the fluid outlet 45. The fluid inlet 44 is connected to a piping hose 35 described later. A fluid inlet 46 is provided in a part of the bag 32.
The fluid inlet 46 of the bag 32 and the fluid outlet 45 of the support plate 42 are disposed to face each other.

The control valve section 33 of the present embodiment controls the supply amount of the fluid supplied from the fluid storage section described below, and the primary pressure disposed on the fluid inflow side as shown in FIG. And a control valve 53 via a flow control valve (for example, an electromagnetic valve or the like) 52.
The secondary pressure gauge 54 is disposed on the discharge side of the third valve 3, and a control valve for adjusting the outflow flow rate is formed on the side on which the fluid is discharged from the bag 32. The control valve unit 33 compares and calculates the pressure deflection and the like applied to each bag 32 by a control device described later, and adjusts the inflow amount and outflow flow rate of the fluid into each bag 32 to perform movement control in a well-balanced manner. It is.

The fluid reservoir 34 of this embodiment is for temporarily storing the fluid supplied from the pump 37 by the piping hose, and supplying the fluid to each bag 32 as a uniform pressure. It is connected to a supply hose 35.

The piping hose 35 of the present embodiment introduces the fluid supplied from the pump 37 into the above-mentioned fluid reservoir 34 via a control valve 38, and further from the fluid reservoir 34 to each bag 32 via a control valve 33. To supply the fluid. In this embodiment, air is used as the fluid, and the air suction port of the pump 37 is opened to the atmosphere via a dust collector or the like.

The control device (not shown) of the present embodiment detects the pressure and balance of each bag 32, and controls the supply of the fluid air to the fluid caster 30 by adjusting the control valve portion 33.

The operating principle of the fluid caster 30 will be described. When the load is on the support plate 42, the load is supported by the protruding disk portion 41 of the support plate 42 disposed at the center of the bag 32. When moving the load on the fluid caster 30, the fluid fed into the fluid caster 30 fills the inside of the donut-shaped bag 32, and the flattened donut-shaped bag 32
Bulges and rounds.

When the donut-shaped bag 32 bulges in a round shape, the fluid also fills the gap, and escapes through the space between the lower surface of the donut-shaped bag 32 and the skid surface. At this time,
The thin fluid film significantly reduces the frictional force between the fluid casters 30 and the skid surface. Thus, at all times, a slight fluid flow forms a fluid film, which makes it possible to transfer the load on the fluid caster with a small force.

Then, the precast box culvert 4 is floated by the fluid casters 30 and moved on the raceway surface 10. The coefficient of friction at the contact surface between the raised precast box culvert 4 and the foundation concrete 1 is significantly reduced by the air discharged from the casters 30. The coefficient of friction is approximately μ = 0.003.

When the air pressure of the caster 30 reaches a predetermined value,
After confirming that the precast box culvert 4 is floating, the driving unit (not shown) or the like starts moving the precast box culvert 4 vertically.

The driving unit of this embodiment is designed to be mounted behind the precast box culvert 4 in the moving direction. Then, the precast box culvert 4 is moved to a predetermined position in the pit 11 and installed.

If the precast box culvert 4 already installed is present, it is connected (connected) to the existing precast box culvert 4. The connection (connection) is performed by known means such as connection and installation work in the embodiments described later.

According to the second aspect of the present invention, in the method of applying the precast box culvert 4 using the fluid casters 30, the precast box culvert 4
And a step of forming a track surface 10, a step of disposing a fluid caster 30 on the lower surface of the precast box culvert 4, and a step of moving the precast box culvert 4 on the track surface 10. ,
The configuration includes an installation step and a step of removing the fluid casters 30 and filling the space between the precast box culvert 4 and the installation surface with the filler 23.

That is, as shown in FIG. 2, the step of building the precast box culvert 4 of the present embodiment in the mine 11 is performed by inserting the precast box culvert 4 from the entrance 12 formed by a crane or the like (not shown).
Put it in 1. Although the example of FIG. 2 shows an example in which a plurality (four in this example) of precast box culverts 4 are blocked, the precast box culverts 4 need not be blocked.

The precast box culvert 4
As described later, through holes 21 are formed at the four corners of the precast box culvert 4 to block
The connecting rods 22 are inserted through the plurality of precast box culverts 4 and the respective through holes 21, and fixed by nuts at both end positions of the front and rear precast box culverts 4 to form a temporary assembly. At this time, it is also possible to perform the final fastening instead of the temporary assembly. For consolidation,
The connecting rod 22 is used, but not limited to this, it is possible to use various types such as a PC wire, a PC steel material, a steel material, and the both ends can be fixed by using corresponding ones. It is possible.

The step of forming the track surface 10 having a smooth surface (skid surface) up to the laying position of the precast box culvert 4 of this embodiment is performed by laying the thin tin plate 2 on the foundation concrete 1 as in the above embodiment. Alternatively, it may be configured such that a film or the like is laid so that the concrete surface is sufficiently smooth. The film is
Various materials such as metal and resin can be used. When a resin film is used, it is preferable for the environment to use a material that can be decomposed by soil bacteria or the like.
As shown in FIGS. 3 to 5, the base concrete 1 of the present example is formed with a convex portion 1a at the center. Therefore,
The precast box culvert 4 can be moved by using the convex portion 1a as a guide for the fluid caster 30.

The step of arranging the fluid casters 30 on the lower surface of the precast box culvert 4 on the raceway surface 10 of the present embodiment is such that the precast box culvert 4 And the fluid casters 30 are inserted between the foundation concrete 1 and the precast box culvert 4 formed at positions on both sides of the projection 1a.

FIG. 1 is a flow chart showing a method of constructing a precast box culvert 4 using an air caster as a fluid caster 30 according to an embodiment of the present invention. The construction method in this example is
A step of building the precast box culvert 4 in the mine 11 (building work), a step of blocking the plurality of built-in precast box culverts 4 by connecting means (connecting work), and a step of forming the raceway surface 10 When,
A step of disposing the fluid casters 30, a step of moving the precast box culvert 4 on the raceway surface 10 (moving work), and a step of joining the constructed precast box culvert 4 with joining means (or connecting means) ( Or a step of removing the fluid casters 30 and filling the space between the precast box culvert 4 and the arrangement surface with the filler 23 (filling step). In this flowchart, if the precast box culvert 4 is not to be blocked, the above-described connecting step can be omitted.

In this embodiment, an example in which the precast box culvert 4 as the element of claim 3 is divided into a plurality of blocks will be described. First, a step of blocking a plurality of built-in precast box culverts 4 by connecting means will be described.

In this embodiment, a temporary assembly table 5 is formed at a position where the precast box culvert 4 is to be blocked.
The temporary assembly table 5 includes a plurality of rotating bodies 6 and guide rollers 7. That is, a plurality of rollers as the rotating body 6 are provided at both ends of the foundation concrete 1 (ground) side. As shown in FIG. 6, the roller (rotary body 6) includes a shaft support 6a and a shaft 6
b is fixed by a bolt 6c, and the roller 6d is arranged so as to be rotatable.

Further, at a position outside and above the rotating body 6,
A support portion 7a of the guide roller 7 is erected, and the guide roller itself 7b is rotatably disposed on the upper end of the support portion 7a. The guide roller itself 7b is disposed so as to protrude from the support portion 7a toward the rotating body.

When the precast box culvert 4 is to be blocked, the first precast box culvert 4 built in the mine 11 is first supported by rollers (rotary members 6), and the number of blocks to be blocked is adjusted. ,
It is moved by the distance of the width of the plurality of precast box culverts 4. Next, a second precast box culvert 4 is erected and moved on rollers (rotary body 6) in accordance with the number of blocks to be sequentially formed. At this time, the precast box culvert 4 is guided by the guide roller 7 so as not to sway.

Next, the plurality of precast box culverts 4 are brought into contact with each other, and the precast box culverts 4 are joined at the position of the temporary assembling stand 5 by PC steel rods 16 threaded at about 3 to 4 ends. And block it. In the blocking as in this example, through holes 21 are formed at the four corners of the precast box culvert 4, and the PC steel rod 16 is inserted into the through holes 21, and the PC steel rod projecting from the front and rear precast box culverts 4 is formed. A nut is screwed into the 16 screw portions to form a block.

In this example, through-holes 21 are formed at four corners of the precast box culvert, and the PC steel rod 16 is inserted into the through-holes 21, and the threaded portions of the PC steel rod 16 projecting from the front and rear precast box culverts 4. Although the example in which the nut is screwed into the block to form a block is shown, the present invention is not limited to the technique using the PC steel rod 16 and the nut. Of course, the precast box culvert can be blocked.

With this configuration, the plurality of precast box culverts 4 can be handled integrally in the pit 11 and moved to a predetermined installation position.

After the plurality of precast box culverts 4 are blocked as described above, the fluid casters 30 are arranged in the gap between the roller (rotary body 6) and the foundation concrete 1 (ground) as described above.

The step of moving the precast box culvert 4 on the raceway surface 10 by the fluid caster 30 of the present embodiment is performed by connecting a plurality of (four in this embodiment) precast box culverts 4 as shown in FIG. The precast box culvert 4 is lifted and moved by the casters 30. In order to control the moving direction of the precast box culvert 4, guide rollers, winches and the like are used as needed.

The installation work of this embodiment is performed by completely connecting (connecting) the precast box culvert 4 that has moved and the precast box culvert 4 that has already been installed.

That is, after the movement of the precast box culvert 4 to the target position is completed, the plurality of block-shaped precast box culverts 4 that have moved and the precast box culvert 4 that has been completed are lever-operated while operating the fluid casters 30. Join using a block or the like. After joining is completed, PC steel bar 16
Is removed, and it is completely connected (connected) with the constructed block by this tension.

To explain this more specifically, the connection (connection) is as follows. After joining as described above, the blocked nut and the PC steel rod 16 are removed, and the precast box culvert 4 blocked and the installation position are set. Connect with the precast box culvert 4 already laid.

At this time, the fluid supply to the fluid casters 30 is stopped at a predetermined installation position, and the fluid casters 30 are positioned and connected by bolts and nuts. At this time, the connection between the precast box culverts 4 is reliably performed by filling the connection surface with the filler 23 and the like.

Also, the precast box culvert 4 which has moved with the existing precast box culvert 4
In addition to the example described above, the technique of connecting the precast box culvert with a joint (FIG. 16), the technique of connecting the fittings and the bolt and nut (FIG. 17), and the PC
There is a technique performed by tightening steel materials (FIG. 18) and a technique performed by connection using a one-touch joint (FIGS. 19 and 20).

For example, the technique of connecting the precast box culverts with a joint (FIG. 16) is the simplest technique, and connects the precast box culverts by joining receiving holes provided on the end face of the precast box culvert 4. . That is, the insertion port 25a is formed in the end face of one precast box culvert 4 (the right side in this example), and the other precast box culvert 4 (the left side in this example).
This is a technique in which an eave-shaped projection 25b inserted into the insertion port 25a is formed on the inner side of the end face of No. 4 and joined at the receiving insertion port. This connection technique is suitable for use when the ground is stable, the groundwater level is low, and there is no fear of water leakage, or when the inner space of the box is narrow and tension work is difficult.

The technique (FIG. 17) of screwing the connection fitting and the bolt and nut is such that a steel flange-like fitting 26 is buried in the end face of the precast box culvert 4 and joined to the precast box culvert fitting 2.
The bolts 27a are inserted through the butts 6 and connected by nuts 27b. This is suitable when the end face of the precast box culvert is inclined, or when it is desired to perform more reliable connection than the connection by the technique of FIG.

The technique performed by tightening the PC steel material (FIG. 18) is the most general and reliable technique. The PC steel material is inserted through the through hole 21 in the end face of the precast box culvert and connected by tightening the PC steel material. Things. That is, a PC steel material is inserted between the existing precast box culverts and connected by tightening. Although this technique requires more work steps, it is often used as a measure against ground deformation and water leakage.

Further, as shown in FIGS. 19 and 20, JP-A-9-132935 and JP-A-9-132936.
Connection device (so-called one-touch
Joint). This is a technique in which a one-touch joint is embedded in the end face of a precast box culvert and connected by male and female fitting.

The technique performed by the connection using the one-touch joint will be described. The female connector 65 and the male connector 7
2 and the entire structure of the reinforcing and connecting shaft 78 constitute a connecting device of the precast box culvert. To describe this in detail, reference numeral 61 denotes a cylindrical female main body, which has a connection inner tapered portion 62 formed on the front side thereof, and a connection screw hole 63 provided at a rear portion of the cylindrical female main body 61. ing. A female connector 65 is provided with an inner collar-shaped claw receiving groove 64 having a concave cross-sectional shape at the edge 62a of the connection inner taper portion 62.

The male connector 72 has a tapered shaft portion 67 formed on the front side of the cylindrical male main body 66 so as to taper into the inner tapered portion 62. A screw hole 68 is provided, and the lower end is supported by one or more (three in the figure) claw holes 69 drilled around the tapered shaft portion 67 by an elastic body 70 mounted inside the main body 66a.
It is formed by protruding at least three (three in the figure) cylindrical engaging claws 71.

The elastic body 70 of the present embodiment is constituted by a leaf spring 75 having a base end fixed to a stop ring 74 which is locked by a stop screw 73 at the front end of the inside (inside the cylinder) 66a of the main body. Insert the lower end of the engaging claw 71 into the flat connecting portion 71a into the guide elongated hole 76 formed at the tip of the
7 to lock. Reference numeral 78 denotes a bolt shaft type reinforcing and connecting shaft having a product length that is embedded and penetrated at a predetermined position (for example, four places) in the longitudinal direction of the precast box culvert. At both ends of the reinforcing and connecting shaft 78, screw portions 79, 79 are provided, into which the connecting screw holes 63 of the female connector 65 and the connecting screw holes 68 of the male connector 72 are screwed. Reference numeral 22 denotes a warp pin 17 and a leaf spring 15
A packing interposed therebetween prevents the inflow of cement paste.

The connecting device is incorporated into the precast box culvert 4 at the time of placing concrete in the production of the precast box culvert 4 in addition to a predetermined reinforcing bar (not shown) and a predetermined position (for example, In the precast box culvert 4 as shown in FIG. 7, four female connectors 65 are provided at both ends at four corners.
And the reinforcing and connecting shaft 78 to which the male connector 72 is attached is embedded and embedded. Thereafter, after a predetermined cement curing period, if the mold (not shown) is removed, the precast box culvert 4 with the connecting device is completed. The other male connector 72
May be integrated when the precast box culvert 4 is formed, or after forming, the screw portion 79 of the reinforcing and connecting shaft 78 may be used.
To be detached and used.

In the detachable use of connecting the male connector 12 to this connection work, the tapered shaft portion 77 of the male connector 72 does not always protrude from the end face of the precast box culvert 4, so that the storage, transport, etc. It becomes convenient for handling. The male connector 72 removed in advance is used by attaching it to the reinforcing and connecting shaft 78 at a predetermined position during the connection work.

For example, in the case of constructing a tunnel by connecting the precast box culverts 4 of a rectangular casing sequentially, a female connector 65 and a male connector 72 are installed on both end surfaces of the adjacent precast box culverts 4 so as to face each other. I do. In this state, the tapered shaft portion 6 of the male connector 72
One precast box culvert 4 protruding 7
Is moved to the end face side of another precast box culvert 4, the female connector 65 with which the tapered shaft portion 67 faces is connected.
The engaging claws 71 which are inserted into the inner taper portion 62 for connection and project laterally at three places on the outer periphery of the tapered shaft portion 67 first contact the edge 62a of the inner taper portion 62 for connection.
Since the engaging claw 71 has a notched guide inclined surface 71b at the upper corner of the front edge for facilitating approach impact reduction and descending movement (immersion), the impact applied to the guide inclined surface 71b is reduced by the downward pressing force. The engagement pawl 71 is converted into a leaf spring 75 inside the main body 66a.
Is temporarily immersed in the interior 66a side until it passes through the lip 62a.

Thereafter, when the engaging claw 71 reaches the inner collar-shaped claw receiving groove 64 which is the end of the inner tapered portion 62 via the lip portion 62a, the engaging claw 71 causes the leaf spring 75 to rebound. It returns to the projecting position of the receiving source, and is engaged with the groove surface 64a of the inner collar-shaped claw receiving groove 64. The tapered shaft portion 67 is tapered into the connecting inner tapered portion 62, and the opposing precast box culverts are connected to each other. Connected.

The next stage precast box culvert 4 is attached to one end face of the precast box culvert 4.
When the other end surfaces of the male and female connectors are abutted, the female connector 65 and the male connector 72 are automatically connected. The above-described fastening technique using the one-touch joint is suitable for the case where the tensioning operation using a PC steel material and the screwing operation of the bolt and nut are omitted and the connection is desired to be performed more reliably.

FIGS. 21 to 23 show another example of a connecting device using an elastic material for supporting the engaging claw on the male connector side, using rubber or an elastic filler which is a urethane-tar soft filler which is cured at room temperature. FIG. 21 shows another embodiment using an elastic filler as an elastic body. FIG. 21 is a partially cutaway side view in which a female connector and a male connector are taperedly fitted.
2 is a cross-sectional view of the position of the engaging claw, FIG. 23 is an explanatory diagram of the prismatic engaging claw, (A) is a side view, and (B) is a plan view.

In this embodiment, an example is shown in which the shape of the engaging claw 71 of the male connector 72 is prismatic.
That is, a connection screw hole 63 is formed in the rear part of the cylindrical female main body 61 having the connection inner tapered portion 62 formed therein, and the inner tapered portion 6 is formed.
A female connector 65 is formed by providing an inner flange-shaped receiving groove 64 in the second rim 62a. In the male male body 66, the claw holes drilled in the tapered shaft portion 67 are square claw holes 69 '.
9 ′ is fitted with a prismatic engaging claw 71 ′,
The lower end of 1 'is embedded in and supported by an elastic filler 83 of a rubber or urethane-based soft filler, which becomes the elastic body 70, which fills the inside 66a of the male main body 66. And the warp pin 77 is orthogonally engaged. The illustrated prismatic engaging claws 71 ′ are arranged on three sides around the tapered shaft portion 67.

Here, the connection work of the opposing precast box culverts 4 and 4 is basically the same as that of the above-described embodiment, and the end face of one precast box culvert 4 is made to face the end face of the other precast box culvert 4. , The inner tapered portion 6 of the female connector 65 on one side.
2, the tapered shaft portion 67 of the other male connector 72 on one side is inserted, and the prismatic engaging claws 71 ′ projecting in three directions around the tapered shaft portion 67 protrude into the inner flange-shaped receiving groove 64. It is connected by nail locking.

At this time, since the support member is made of the elastic filler 83, the elastic pillar 83 is slightly collapsed so that the prismatic engaging pawl 71 '
Is slightly immersed into the claw hole 69 ′, and the prismatic engagement claw 71 ′ passes through the rim portion 62 a of the inner taper portion 62 and the inner collar-shaped receiving groove 6.
When the number reaches 4, the elastic filler 83 is repelled and returns to the protruding state, so-called claw locking. Further, this claw locking is performed by the inner collar-shaped receiving groove 64.
In this case, since the rectangular column-shaped engaging claws 71 'come into surface contact with each other, it is possible to obtain a greater locking than the point contact of the round shaft-shaped engaging claws 71 of the above embodiment. Note that the type in which the prismatic engaging claws 71 ′ are provided is a rectangular claw hole 6 with respect to the male body 66.
9 'is suitable for resin, which is easy to drill. At this time, the female main body 61 is also made of resin.

In the filling step of this embodiment, the fluid casters 30 are removed and the space between the precast box culvert 4 and the laying surface is filled with the filler 23. That is, in this example, the foundation concrete 1 is configured as the convex surface 1a for disposing and guiding the fluid casters 30, so that the precast box culvert 4 is installed on the convex surface 1a as shown in FIG. In some cases, a space is formed on both sides of the convex surface 1a, so that the precast box culvert 4 is stably installed by filling this portion with the filler 23 from the end. In addition, as the filler 23, a mortar material or other known materials can be used.

In the filling operation for filling the filler, in addition to the filling from both side ends as described above, as shown in FIG. 7 and FIGS. The hole 4a is provided at a predetermined position, and a filler can be filled through the through hole 4a. In addition, in the case of FIGS. 7 and 10, between the lower end portions on both sides of the precast box culvert 4 and the laying surface,
The frame is formed by the frame 4b so that the filler is filled in a predetermined manner.

FIG. 9 and FIG. 10 show examples in which the main body of the foundation concrete 1 and the precast box culvert 4 are changed as required in the vertical pulling construction. For example, the example shown in FIG. 9 is an example in which the foundation concrete 1 is a concave foundation, and the example shown in FIG. 10 uses the precast box culvert 4 in which the foundation is left flat and the lower surface is convex. This is an example. Thus, between the foundation concrete 1 and the precast box culvert 4, the fluid casters 3
0 can be arranged, so that it can float and move on the foundation concrete 1.

Since a dedicated temporary assembling stand is provided at the erection location, it is possible to install the next precast box culvert 4 and block it even during the vertical pulling movement of the precast box culvert 4. In addition, it is also possible to perform a connection work at the above-mentioned installation position,
Work efficiency is improved.

FIG. 11 is a partial explanatory view showing a state in which the guide rollers 17 are provided on the fluid casters 30. In this example, a guide is formed on the foundation concrete 1, and the guide and the guide roller 1 provided on the fluid caster 30 are provided.
7 shows an example in which the fluid casters 30 are formed so as to guide their movement. In this example, the guide 18 is constituted by the bolt nuts 18a and 18b and the guide plate 18c. The height of the guide plate 18c is adjusted by adjusting the nuts 18b and 1 supporting the guide plate 18c.
It can be adjusted by the position of 8b. Further, the guide roller 17 has a bifurcated support portion 17a formed on the side surface of the fluid caster 30, a rotary shaft 17b provided on the bifurcated support portion 17a, and a roller 17c rotatably disposed on the rotary shaft 17b. Things.

FIG. 12 is an explanatory view showing an example of the movement of the precast box culvert by the fluid caster 30 at the corner turning portion when moving. In this example, traveling guidance is provided between the fluid casters 30 and the foundation side.
In this example, by forming a tapered convex guide 19 on the bent side as shown in FIG. 12 (A) in the bent part, even if the fluid caster 30 has a bent part, Can be constructed.

In other words, the convex portion 1a is formed substantially in the center of the raceway surface 10 of the precast box culvert 4 in the traveling direction, but at the corner bent portion, a position at a predetermined distance before the corner bent portion. Therefore, the projection 1a is not formed. Then, the convex portion 19a is formed again from a portion at a predetermined distance from the corner bent portion. At this time, the projection 19
In a, the front side surface in the direction in which the corner is bent is formed as a taper having a narrow width direction. FIG.
A guide roller 17 as shown by 1 is provided. In the illustrated example, the guide projection is formed substantially at the center of the foundation concrete 1, but it is not necessary to be at the center.

With this configuration, as shown in FIG. 12B, the front right side of the block-shaped precast box culvert 4 that has proceeded straight ahead of the fluid caster 30 on the left side is just before the collision with the side wall of the counter. Guide roller contacts the convex protrusion guide to change the direction of the fluid caster 30. Next, as shown in FIG. 12 (C), before the right rear of the blocked precast box culvert 4 collides with the side wall of the counter, the guide roller of the fluid caster 30 on the right contacts the convex guide projection 19a. Then, the direction of the fluid caster 30 is changed.

The fluid casters 30 change the moving direction with a slight force.
0 changes the direction each time it comes into contact with the guide projection, but it moves between the fluid casters 30, and the guide roller 17 prevents the precast box culvert 4 from swaying. As shown in FIG. In addition, it is possible to smoothly pass through the bent portion.

In the above embodiment, the guide roller is provided on the fluid caster side. However, the guide roller is provided on the guide projection side which is the base side, so that the guide in the moving direction is provided. Of course you can.
In the above embodiment, the guide projections are used on the side of the foundation concrete 1. However, for example, in the example shown in FIG. Can be guided,
It is not necessary to form a special guide projection. At this time, a guide roller may be formed on the fluid caster 30 side or a guide roller may be formed on the base side as described above.

FIG. 24 shows another embodiment of the installation work. Also, the precast box culvert 4 of this example
Shows an example in which two spaces are formed on both sides of the partition by dividing the middle. That is, in this example, as shown in FIG. 24, the foundation concrete 1 is formed in a concave shape, the grout hose 9 is buried in advance at the installation position, and one end of the grout hose 9 is attached to the precast box culvert 4 , And the other end is released into the recess of the foundation concrete 1. Then, the precast box culvert 4 is moved to the installation position by any means of the above embodiments.

After a predetermined process, the precast box culvert 4 is arranged at a predetermined position. Then, a filling step is performed. In this filling step, the fluid casters 30 are removed and filling is performed using the filler 23 between the precast box culvert 4 and the laying surface, as in the above-described embodiment. At this time, in the present embodiment, the grout hose 9 is configured to be filled with the filler from the underground 11 side.
Air mortar can be used as the filler.

With the configuration as in the present example, even if the precast box culvert 4 is not processed through holes or the like, the base concrete 1 having the concave portion formed in the center side can be filled with the filler. It is possible to expand the degree of freedom in selecting a construction method by combining the above-described embodiments and the like.

According to an embodiment of the present invention, in the method of applying a precast box culvert according to any one of claims 1 to 4 using a fluid caster, a guide roller is provided on the foundation side, and the fluid caster is guided by the guide roller on the foundation side. Therefore, it is possible to prevent the precast box culvert from swaying.

According to an embodiment of the present invention, a method for constructing a precast box culvert according to any one of claims 1 to 5 using a fluid caster is such that a pipe body is buried in advance at an installation position, and the precast box culvert is installed. It is also possible to include a configuration in which a filler is filled from a pipe body between the pipe and the laying surface.

[0090]

As described above, according to the present invention,
When moving the precast box culvert, it is possible to move any of the straight part, the curved part, and the bent part to the installation position and perform the construction.

Further, at the time of moving, it is possible to block one to a plurality of precast box culverts and move them at once. Further, even during movement, in the precast box culvert erection section, a plurality of pieces can be blocked, so that a temporal construction loss is reduced and construction efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a flowchart of a construction method according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a construction method according to an embodiment of the present invention.

FIG. 3 is a partial explanatory view showing a state in which a fluid caster is inserted while a precast box culvert after being built is supported by a rotating body.

FIG. 4 is a partial explanatory view showing a state immediately after the operation of the fluid caster after FIG. 3;

FIG. 5 is a partial explanatory view showing a state in which a precast box culvert is floated by operating a fluid caster.

FIG. 6 is a partial explanatory view showing an arrangement state of a rotating body and a guide.

FIG. 7 is an explanatory diagram showing an installed state of a precast box culvert.

FIG. 8 is an explanatory diagram showing a state in which a plurality of precast box culverts are blocked.

FIG. 9 is an explanatory diagram showing another configuration of the fluid caster, the raceway surface, and the precast box culvert.

FIG. 10 is an explanatory view showing a configuration of still another fluid caster, a raceway surface, and a precast box culvert.

FIG. 11 is a partial explanatory view showing a state in which a guide roller is provided on a fluid caster.

FIG. 12 is an explanatory diagram showing an example of a movement at a corner turning part when a precast box culvert is moved by a fluid caster.

FIG. 13 is a partially cutaway explanatory view of a fluid caster.

FIG. 14 is a diagram illustrating the operation of the fluid caster.

FIG. 15 is a schematic configuration diagram of a control system of a fluid caster.

FIG. 16 is an explanatory diagram of a connection (connection) step.

FIG. 17 is an explanatory diagram of another connection (connection) step.

FIG. 18 is an explanatory diagram of still another connection (connection) step.

FIG. 19 is an explanatory view of still another connection (connection) step.

FIG. 20 is a partially cutaway side view of the connection device.

FIG. 21 is a partially cutaway side view in which a female connector and a male connector are taperedly fitted, showing another embodiment using an elastic filler as an elastic body.

FIG. 22 is a cross-sectional view of an engagement claw position.

23A and 23B are explanatory views of a prismatic engagement claw, wherein FIG. 23A is a side view and FIG. 23B is a plan view.

FIG. 24 shows another embodiment of the installation work.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Basic concrete 1a Convex part 2 Galvanized steel plate 3 Concrete panel 4 Precast box culvert 4a Through hole 4b Frame 5 Temporary assembly stand 6 Rotating body 6a Shaft support part 6b Shaft 6c Bolt 6d Roller itself 7 Guide roller 7a Support part 7b Roller itself 9 Pipe body (Grout hose) 10 Track surface 11 Underground 16 PC steel rod 17 Guide roller 17a Support portion 17b Rotary shaft 17c Roller 18 Guide 18a, 18b Bolt nut 18c Guide plate 19a Guide protrusion 21 Through hole 22 Connecting rod 23 Filler 30 Fluid caster 31 Carriage 32 Donut-shaped hollow bag 33 Control valve part 34 Fluid storage part 35 Piping hose 37 Pump 41 Projecting disk part 42 Support plate plate 44 Fluid inlet 45 Fluid outlet 46 Fluid inlet 51 Primary pressure gauge 52 Flow control valve (for example, solenoid valve, etc.) 53 Control valve 54 Secondary pressure gauge 61 Female main body 62 Internal taper part for connection 63 Screw hole for anchor 64 Inner flange claw receiving part 65 Female connection body 66 Male main body 67 Taper shaft part 68 Anchor screw part 69 Claw hole 70 Elastic body 71 Engagement claw 72 Male connector 74 Stop ring 75 Leaf spring 78 Anchor member 83 Elastic filler

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiro Tanaka 11-3, Mitsuke-cho, Hiratsuka-shi, Kanagawa (72) Inventor Soichi Nagao 6-14-1-107, Motonakayama, Funabashi-shi, Chiba (72) Inventor Toshihide Nemoto 2-15, Kabukicho, Shinjuku-ku, Tokyo Sumiken Concrete Industry Co., Ltd. (72) Inventor Koichi Iida 2-2-1-15, Kabukicho, Shinjuku-ku, Tokyo Sumiken Concrete Industry Co., Ltd. (72) Inventor Motoya Sugiyama, 2-2-15, Kabukicho, Shinjuku-ku, Tokyo Sumitomo Concrete Industry Co., Ltd. (72) Inventor Jiro Kondo 2-2-1-15, Kabukicho, Shinjuku-ku, Tokyo Sumitomo Concrete Industry Co., Ltd. (72) Inventor Yosuke Shikata 4-9-1-9 Akasaka, Minato-ku, Tokyo Inside Japan Land Development Co., Ltd. (72) Inventor Rikuhachiro Bandai Akasaka, Minato-ku, Tokyo 4-9-9 Japan Land Development Co., Ltd. (72) Inventor Chiyuki Kawamura 4-9-9 Akasaka Minato-ku, Tokyo Japan Land Development Co., Ltd. (72) Inventor Kenichi Uchida Akasaka 4 Minato-ku, Tokyo 9-9-9 Japan Land Development Co., Ltd.

Claims (5)

[Claims] A step of forming a smooth raceway surface up to a position where the precast box culvert is laid; a step of arranging a fluid caster on a lower surface of the precast box culvert on the raceway surface; Moving the precast box culvert on an orbital plane. 2. A step of laying a precast box culvert in a mine, a step of forming a track surface which is smooth up to a laying position of the precast box culvert, and a step of: A step of disposing a fluid caster, a step of moving the precast box culvert on the raceway surface by the fluid caster, and a connecting step of completely connecting the precast box culvert that has moved and the precast box culvert that has already been installed, Removing the fluid casters and filling the space between the precast box culvert and the placement surface with a filler material. 3. A step of laying a precast box culvert in a mine, a step of blocking a plurality of buried precast box culverts by connecting means, and a track surface smoothed to a laying position of the precast box culvert. Forming a fluid caster on the lower surface of the precast box culvert blocked on the track surface, and moving the precast box culvert blocked by the fluid caster on the track surface. The step of joining the precast box culvert that has been moved and the precast box culvert that has been moved and the already applied precast box culvert, and the joining step of joining with the installed precast box culvert after the joining, and removing the fluid caster, Filling the space between the precast box culvert and the base portion with a filler, and using a fluid caster for the precast box culvert. 4. A plurality of rotating bodies are arranged on the foundation side at the blocking position, and a guide roller is arranged at an upper position outside the rotating body, and a precast box culvert built in the pit is provided. The method according to claim 2 or 3, wherein the caster is supported by a plurality of rotating bodies, and a fluid caster is disposed in a gap between the rotating body and the base surface. 5. The fluid caster according to claim 1, wherein a guide roller is provided, and the guide roller is guided to a base side to prevent the precast box culvert from swaying. Either of the precast box culverts described in any of the above, using a fluid caster.