JPS60164504A - Construction of track beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a track girder such as a suspended type girder rail girder.

Conventionally, when constructing this type of track girder on a road, the shoring was assembled and dismantled using a small truck crane, the girder blocks were brought in using a large vehicle such as a trailer, and the girder blocks were hoisted and erected using a large truck crane. are doing.

If this work is to be carried out within an existing conduit, the construction of shoring,
During demolition and girder block hoisting and erection work, there is a risk that these objects may collapse, overturn, or fly and fall onto vehicles passing in adjacent lanes of the work zone and pedestrians on the sidewalk, causing a disaster. Noise and vibration during work by truck cranes became a problem, traffic congestion occurred due to large vehicles coming in and out as girders were brought in, and traffic was caused by a reduction in lanes due to the work zone occupying the center of the existing road. leading to traffic congestion.

The present invention has been proposed in order to eliminate such problems, and consists of extruding a construction method equipped with a hand-stretching machine at the tip from above the existing track girder, and constructing a transportation vehicle that moves along the track girder. The track girder block brought to the site by a trolley is suspended and transported to the front of the erection span, then the block is suspended onto an erection trolley that moves according to the construction method described above, and carried to the erection position by the same trolley. The construction is carried out and erected at a predetermined height, and then the track girder blocks are sequentially erected in the same manner as described above to complete the erection of the track girder in the span, and then the construction girder is extruded and erected, and the same steps as described above are repeated. This relates to a track girder erection method characterized by repeating the steps.

In the present invention, as described above, a construction girder equipped with a hand-stretching machine at the tip is extruded from an existing track girder in a cantilever manner, and a transportation trolley movably mounted on the track girder is installed. The track girder block that was carried in was suspended on the same transport trolley and moved to the front of the erection span, then the block was transferred to the erection trolley that moves along the oil girder, and the same transport trolley was moved. The track girder blocks are suspended and transported to the erection position, adjusted and erected to the required height, and then the track girder blocks are sequentially erected in the same manner as described above to complete the erection of the track girder in the span. It is. Therefore, according to the present invention, the track girder block is suspended by the transportation trolley and the erection trolley, and is transported and erected at the required location, so the track girder block is transported to the erection point regardless of the bearing capacity of the terrain. In addition, there is no danger that it will have a negative impact on traffic accidents.

In addition, in the present invention, after the construction of the track girder for one span is completed, the construction girder can be pushed out and erected from the same track girder to the next span, so the construction period is significantly shortened and the shoring is not required. Compared to the conventional construction methods used, the cost of temporary construction machinery is less, and costs can be significantly reduced.

The present invention will be described below with reference to the illustrated embodiments.

(A3 is the existing track girder, (B) is the construction girder equipped with a hand rolling machine (C) at the tip, and inside the track girder (A) is a transportation trolley (1).
is movably mounted, and an erection trolley (2+) is movably mounted on the construction girder (B).

(3) is a girder trolley, which can be transported by hanging on the transport trolley (1) and then transferred to the erection trolley (2) for easy transport.
The girder hanging rod (4) is attached.

A construction girder (B) equipped with a hand-stretching machine (C) at the tip is assembled using a self-propelled crane (D), and a delivery jack (5) and roller equipment (6) are arranged on the track girder (A). The construction girder (B
) is sent out between the supports (7) and fixed with the construction girder temporary fixing beams (8). (See Figures 1 to 3 and Figure 12) Next, the track girder block (3
α) is hoisted up by the hoist (9) from the transport trolley (1) and transported to the front of the erection point by the transport trolley (1).

(Refer to Figures 4 to 6 and 13) The track girder block (3a) thus transported by the transport truck (1) is mounted on the construction girder (B). ), the track girder block (3α) was erected at the installation position on the support column (7) using the same truck (2), and the track girder block (3α) was placed on the construction girder (Bl) from the truck (2). Temporary support beam (
111's hoist 02), adjust the height to the height of the foot, and support it. (Figures 7 to 8 and 14 to 16
(See figure) Similarly, the track girder blocks C36) (3C) brought in by trailer (E) are successively erected to complete the erection of the track girder in the span. (See figure) Then, the construction girder (B) is extruded and erected in the next span (see Fig. 11), and the same steps as described above are repeated to erect the track girder.

According to the illustrated embodiment, by suspending and transporting the track girder block (3) from a transport trolley (1), it is possible to transport the track girder block (3) to the construction site regardless of the topography and bearing capacity of the construction site, and In the construction on the road, a part of the space under the girder is used, so the work can be carried out with high safety without taking measures such as traffic regulation.

Furthermore, when suspending the track girder block (3) from the transportation trolley (1) to the erection trolley (2), since the girder suspension rod (4) is installed on the same block (3), the same flock ( 3)
- The track girder block (3) can be easily resuspended while suspended in the air without being temporarily placed on the ground, reducing the time required for erection. ) can be moved to the erection position using the same trolley (2), so construction can be carried out regardless of terrain or local forces.

Furthermore, the construction girder (B) can be sent to the next span and erected immediately after the construction of the track girder for one span is completed, so there is less machinery loss compared to the conventional construction method that uses shoring. It's over.

If the construction track girder has a curved section, the construction girder (B) is suspended from the construction truck (2) by a truck adjustment device (not shown) installed in the construction truck (2). By adjusting the position of the track girder block (3) in the width direction, the desired purpose can be achieved without requiring any lateral auxiliary means. (See Figure 18) Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and various modifications of the design can be made without departing from the spirit of the present invention. It is something that can be done.

[Brief explanation of the drawing]

Figures 1 to 11 are normal diJ diagrams showing It of an embodiment of the track girder erection method according to the present invention, and Figures 112 to 16.
The figure is a longitudinal τI 11 side view, H-H, 17 is a perspective view showing the implementation situation of the method of the present invention, and Fig. 18 is a vertical support side view showing the implementation situation of another embodiment of the method of the invention It is. (3)...Existing track girder, (B)...Eng. 44 tsuge, (
C1... Hand rolling machine, (1)... Transportation trolley, (2)...
...Erection trolley, (3! (3α) (3A) (31?
)...orbit girder block

Claims (1)

[Claims] A construction method equipped with a hand-stretching machine at the tip is extruded from above the existing track girder, and the track girder block, which is carried to the site by a transportation trolley that moves along the track girder, is suspended in front of the construction span. After transporting the block to a certain height, the block is suspended on an erection trolley that moves according to the above-mentioned construction method, and the same trolley transports it to the erection position and erects it at a predetermined height. A method for constructing a track girder, characterized in that after the construction of the track girder in the span is completed by sequentially constructing the track girders, the construction method is extruded and constructed, and the same steps as described above are repeated thereafter.