JPH0726370B2 - Winding work vehicle for arch bridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arch bridge winding work vehicle.

[0002]

2. Description of the Related Art When constructing a concrete arch structure, a plurality of hollow tubular arch-shaped supporting steel materials are bridged in parallel with each other by supporting the ends on the support surfaces at both ends of the arch structure to be constructed. There is a method of constructing a concrete arch structure in which the supporting steel material is used as a core, and the outer wound concrete is sequentially placed on the outer side thereof from both ends of the arch of the supporting steel material toward the top. (Japanese Patent Publication No. 60-15763). This method has the advantages that it requires less temporary equipment for installation, has good workability, and is easy to manage. In this method, the wagon is fixed on the existing concrete wound on the supporting steel, the concrete formwork of the other side is held using this wagon, concrete is poured, and the wagon is transferred to the placed concrete. Since the concrete pouring of the other side is sequentially performed, a heavy-structured wagon with high rigidity was used.

Japanese Patent Publication No. 3-64003 discloses that
The arch center is assembled and erected in the space above the arching construction planned position in advance, the concrete form moving support device is placed on the arch center, and the concrete form for arching block construction is hung from this support device, and the form is formed. There is a technique of placing concrete inside and constructing an arching block, and after hardening the concrete, supporting the concrete by the arch ring hanging material hung from the arch center and moving the demolded formwork with a moving support device. It is disclosed. In this method, after the arch ring is completed, the arch ring hanging material is removed from the arch center, and then the arch center is dismantled.

In this construction method, a temporary arch center is used, a work vehicle is run on the temporary arch center, an arch ring block is constructed below the arch center, and the arch ring is arched with an arch ring hanging material until the whole is completed. It is completely different from the technique of Japanese Patent Publication No. 60-15763 described above in that it is suspended from the center. Since the work carriage used in this method runs on the arch center, the tilt of the carriage changes, but the supporting end of the vertical hanging material is a cylindrical surface support part so that the formwork is always hung according to the change. have. In this work trolley, when the concrete is suspended and concrete is placed, the weight of the concrete is borne by the trolley, and therefore the trolley of the trolley has to have a heavy structure. Also,
The wheels cannot bear this load, and a large number of liners are arranged on the arch center, and the underframe of the work vehicle is directly mounted on the arch center via these liners.
The wheels are used only when moving the formwork, and are designed to run on the arch center.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a winding work vehicle for an arch bridge, which is (1) mounted on a supporting steel material of the arch bridge itself and existing concrete via traveling wheels. (2) Only bear the weight of the formwork when moving the concrete formwork. When placing concrete, the formwork and concrete are supported by supporting steel materials and existing concrete, and the work dolly suspends only the work scaffold. (3) Keep the work scaffold always horizontal so that it can be appropriately used as a work place and a material storage place. The sloped part of the scaffold should be stepped so that the tread is always horizontal. And the like are satisfied.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a hoisting work vehicle in which outer-rolled concrete is sequentially placed on an arch-shaped supporting steel material which is erected from the arch end, and a front wheel is placed on the supporting steel material. There is a bogie frame with the rear wheels placed on the existing concrete.From this bogie frame, the concrete form receiving frame and the front and rear horizontal scaffolds provided under the concrete form are respectively suspended by pin joints. Suspending, The concrete formwork is equipped with a connecting device for connecting the front end to the supporting steel material and the rear end to the existing concrete separately when the concrete is placed. It is a work vehicle.

The front and rear horizontal scaffolds have stair-shaped scaffolds connected to each other, and the stair-shaped scaffolds have two treads.
It is characterized in that it is attached to each of the tread plate mounting frames through pin couplings, and the two tread plate mounting frames can be shifted so that the tread plates are always kept horizontal to each other.

[0008]

The hoisting work vehicle of the present invention has the following functions. (A) It runs on supporting steel and existing concrete, suspends only the concrete formwork and scaffolding, and does not bear the weight of the placed concrete. Therefore, a heavy load with a small load and a high rigidity such as a wagon is required at all. do not do. (B) Since the arch supporting steel material is not subjected to the overhanging concrete by using the heavy-structured wagon, it is not necessary to perform the construction in anticipation of an extra load. (C) Since the formwork and scaffold are suspended via the pin joint,
The formwork changes its inclination in accordance with the change of the inclination of the arched supporting steel, and the scaffold is always horizontal. (D) The front and rear scaffolds are connected horizontally in a stepwise manner and always kept horizontal. (E) Therefore, it is possible to construct an arch bridge by bridging the arch-shaped supporting steel material, and wrapping outer-supporting concrete around the supporting steel material from both ends. (F) In addition, it is not necessary to additionally provide a temporary arch center in the space above the arch ring.

[0009]

Embodiments will be described below with reference to the drawings. 1 is a side view of a hoisting work vehicle 1 according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a view taken along the line AA of FIG. 1, and FIG. 4 is a view taken along the line BB of FIG. 5, FIG. 5 is a view taken along the line CC of FIG. 1, and FIG. 6 is a view taken along the line D-D of FIG. 1. As shown in the plan view of FIG. It is composed of several horizontal tie members 20 that horizontally connect to each other and a stiffener 30, and a front suspension frame 40 and a rear suspension frame 50 are laterally bridged. Further, as shown in FIG. 1, the frame 10 on both sides has wheel devices 60 and 70 attached to the lower portions of the front end and the rear end, respectively.

Two suspension rods 80 for suspending the form receiving frame 100 from the front suspension frame 40 and the rear suspension frame 50 are respectively suspended, four suspension rods in total. In addition, two suspension rods 90 for suspending the work scaffold 130 are suspended, and a total of four suspension rods 90 are suspended. The frames 10 on both sides of the hoisting work vehicle of the embodiment are upper chord members 11
The lower chord member 12 and the lower chord member 12 are joined by a vertical tie member 13, and when viewed from the side, a ladder shape is formed. Frame 10 on both sides
As shown in FIG. 7, the upper limit member 11 is connected with the bolts 14 so that the front suspension frame 40 and the rear suspension frame 50 can be easily assembled on site, and the total length can be changed. It is preferable that the end member 15 can be replaced, and both the upper chord member 11 and the lower chord member 12 can be connected with the bolt 14.

As shown in FIG. 3, the horizontal connecting members 20 are attached to the upper and lower surfaces of the side frame 10 in a plurality of rows. As shown in FIG. 3, a turnbuckle type diagonal member 21 is provided to maintain the rigidity of the joint between the horizontal connecting member 20 and the side frame 10.
To arrange. FIG. 3 is a view on arrow AA of FIG. The work vehicle 1 is mounted on the supporting steel material 150 via wheels 70.
The front suspension frame 40 is attached to the frames 10 on both sides, and the form receiving frame 100 is suspended by a suspension rod 80, and the work scaffold 130 is suspended by a suspension rod 90 and a rigid rod 91.
The rigid rod 91 is for keeping the scaffold 131 horizontal. Since the formwork receiving frame 100 is suspended by the suspension rod 80 via the pin, the work vehicle 1 has the arch-shaped supporting steel material 15
Formwork receiving frame 10
0 is moved along the supporting steel material 150.

FIG. 4 is a BB arrow view of FIG. 1, and the rear suspension frame 50 is shown.
Is shown. The wheel device 70 of the trolley 1 is mounted on the already-placed concrete 160, and the side guide contacts the side surface of the concrete 160 to guide the work vehicle 1. Except for these points, suspension of the form receiving frame 100 and the scaffolding frame 130 is the same as in FIG. FIG. 5 shows the CC view of FIG. FIG. 5 shows a fixed state of the form receiving frame 100 immediately before placing concrete. The form-frame receiving frame 100 is rigidly connected to the support-steel member 150 via liners 103 and 104 by a form-frame suspension frame 101 mounted on the upper surface of the support-steel member 150 and a connecting rod 102.

Since the hanging rod 80 hangs vertically from the fixed point of the work vehicle 1 to the fixed point of the form receiving frame, the attachment position of the connecting rod 102 needs to be moved due to the change in the inclination of the work vehicle 1. . The moving device 105 at the lower end of the connecting rod 102 shown in FIG. 1 adjusts this position. FIG. 6 shows a state in which the formwork receiving frame 100 is connected to the existing concrete 160 by the connecting rod 102. The lower end of the connecting rod 102 is the same as that described with reference to FIG.

In the present invention, the steps of moving the formwork and placing concrete using the hoisting work vehicle are as follows. (A) When the casting of the concrete 160 in one section is completed, after curing, the connecting rod 102 is removed and the mold is removed. The form receiving frame 100 is mounted on the front and rear of the work vehicle 1 by the suspension rod 80.
Hang from. (B) The work vehicle 1 is advanced to the next concrete placing section. (C) When the forward movement is completed, the front end of the form receiving frame 100 is connected to the supporting steel material 150 as shown in FIG. 5, and the rear end is connected to the existing concrete by the connecting rod 102 as shown in FIG.
At this time, the lower end of the connecting rod 102 is adjusted by the adjusting device 105 according to the inclination of the work vehicle 1. After the form receiving frame 100 is connected to the supporting steel material 150 and the existing concrete 160 with the connecting rod 102, the suspension rod 80 is moved to the form receiving frame 10.
No hanging load of 0 is applied. (D) Place concrete in the formwork. Then, the process returns to the above step (a).

Next, the working suspension scaffolding of the hoisting work vehicle according to the embodiment of the present invention will be described. As shown in FIGS. 1, 3 and 4, the suspension scaffolding 130 of the present invention is suspended by suspension rods 90 and rigid rods 91 so that the upper surface of the scaffolding is always kept horizontal. Therefore, the work is easy to perform and it is suitable as a material storage area. The front and rear scaffolds 130 have different heights depending on the inclination of the work position of the arch-shaped supporting steel material. As shown in FIG. 8, a stairway scaffold 140 is provided between two scaffolds 130 having different heights. Frame 14 of stair scaffold 140
The upper and lower ends of the scaffold 1 are coupled to the scaffolding 130 by pins 142 and 143, as shown in FIG. 9B, even if the height of the scaffolding 130 changes.
As shown in, the length of the stairway scaffold 140 does not change. The step board 144 of this stairway scaffold is suspended from a rod 147 pin-connected to two members 145 and 146, as shown in a partially enlarged view in FIG. The members 145 and 146 are indicated by arrows 1
By relatively moving in the 48 directions, the tread 144 can always be kept horizontal. Therefore, stairway scaffolding 1
40 is excellent in workability and safety.

[0016]

INDUSTRIAL APPLICABILITY The winding work vehicle for an arch bridge of the present invention is used for a concrete winding construction method of a concrete arch structure, and can be suitably used for carrying out this excellent construction method. The lightweight and simple structure contributes to the efficient construction of the above construction method. Also, since the work scaffold is always kept horizontal,
It greatly contributes to workability, safety, and storage of materials.

[Brief description of drawings]

FIG. 1 is a side view of a hoisting work vehicle according to an embodiment of the present invention.

FIG. 2 is a plan view of the hoisting work vehicle according to the embodiment of the present invention.

FIG. 3 is a view on arrow AA of FIG.

FIG. 4 is a view as seen from the arrow BB of FIG.

5 is a view taken along the line CC of FIG.

FIG. 6 is a view on arrow D-D of FIG. 1.

FIG. 7 is a detail of a side frame.

FIG. 8 is an explanatory diagram of stairway scaffolding.

FIG. 9 is an explanatory diagram of stairway scaffolding.

FIG. 10 is a partial detailed view of a stairway scaffold.

[Explanation of symbols]

 1 Work vehicle 10 Side frame 20 Horizontal tie material 30 Stiffener 40 Front suspension frame 50 Rear suspension frame 60 Wheel device 70 Wheel device 80 Suspension rod 90 Suspension rod 100 Form receiving frame 130 Working scaffold 140 Stairway scaffold 150 Support steel material 160 concrete

Claims (3)

[Claims] 1. A winding work vehicle in which outer-rolled concrete is sequentially placed from an arch end to an arch-shaped supporting steel material that is erected, a front wheel is placed on the supporting steel material, and a rear wheel is placed on existing concrete. With the bogie frame placed, the concrete form receiving frame and the front and rear horizontal scaffolds provided under the concrete form are respectively hung from the bogie frame by means of pin joints with hanging rods. A winding work vehicle for an arch bridge, characterized in that a front end and a rear end are connected to the supporting steel material and a connecting device to the existing concrete, separately from the suspension rod. 2. The winding work vehicle for an arch bridge according to claim 1, wherein the front and rear horizontal scaffolds have stepped scaffolds connected to each other. 3. The stepped scaffold mounts a tread to two tread mounting frames via pins, respectively, and the two tread mounting frames are mutually shiftable so that the treads are always kept horizontal. The winding work vehicle for an arch bridge according to claim 2.