JPS63297602A - Track beam construction method of high double track - 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 [Field of Industrial Application] The present invention relates to a construction method suitable for constructing a track girder for a double track section of an elevated track, such as a straddle-type mole rail.

[Conventional technology]

Traditionally, this type of track has been constructed using methods such as truck cranes, hand-stretched girders, gate structures, ll-made bifurcated cranes, and temporary cranes, each of which may be used alone or two or more of these methods may be used in combination. However, all of them have the disadvantage of being subject to some kind of restriction, such as geographical conditions, construction speed, construction period, or construction cost.

[Problem that the invention seeks to solve]

The hand-stretched girder construction method, which is generally widely used in the erection of Morrail track girders, requires the use of trucks and cranes to unroll the girders, and in places where trucks and cranes are not available due to terrain. However, a temporary crane had to be installed on the support pillars, which was a bottleneck in shortening the construction period. The purpose of the present invention is to eliminate the drawbacks of conventional erection methods, and to provide an inexpensive and short construction method.
The object of the present invention is to provide a safe construction method, which is particularly advantageous in shortening the construction period.

[Means for solving problems]

In order to solve the above problems, the present invention provides a part of the gate crane with a horizontal power transmission device such as an electric motor and a pinion rack, thereby relying on other lifting devices such as a truck crane. The construction of the track girder is proceeded by automatically moving the hand-stretched girder horizontally on the track support like a so-called inchworm.

〔Example〕

Hereinafter, the present invention will be described in detail based on the drawings.

Figures 1 to 6 show each step of the method for constructing an elevated double track girder according to the present invention, and Figure 1 shows a state in which preparations for carrying in a new girder to be erected have been completed, i.e. ,1
is the track girder support, 2 is the existing girder, 4.5 is the hand-stretched girder (4
is the girder, 5 is the pilot), and gate crane, and A is the span of the new girder. First, a truck crane or the like is used to move the manual girders 4 and 5 to the supports 1 and 1, including the span A where the new girder is to be erected. A gate crane is installed on top of it, and the gate crane is placed on standby on the span one span ahead of the new girder erection span A (on the left side of the figure) (Figure 1).Next, the girder transport trolley 7, 7, the new girder 3 is carried in and lowered onto the pillars 1 and 1 of span A (Fig. 2). The 0 girder transport carts 7 and 7 move the existing girder to the right side of the figure, and then move the Move the crane to the right in Figure 1 and fix it to the positioning unit on the new girder construction span A (
(Fig. 3) First, the hand girders 4 and 5 are advanced by one span to the left in the figure by the horizontal power transmission device such as the electric motor and pinion rack installed on the gate crane (Fig. 3).
figure). Structure of gate crane 6.

After advancing the six-hand girders 4 and 5 whose functions will be described later, the new girder 3 is set and fixed at the proper position on the span A by the gate crane 6 (Fig. 5). The gate crane 6 is moved to the span one span ahead of the next erection span A' (to the left in the figure).

The new girder 3' is moved to the next erection span A using the girder transport carts 7 and 7.
(Fig. 6, Fig. 2). Below, the second
Repeat the steps from the diagram to erect a new girder for each span.

Next, the functions of the gate crane, which is the main body of the single-line construction method, will be explained with reference to Figures 7 and 8. Figure 7 shows the schematic structure of the gate crane, and Figure 8 shows one side of its power section.The gate crane is moved to a fixed position on the new girder construction span A (Figure 3) First, the fixed arm 13 installed at the end of the structure 11 and the bracket 15 provided on the support column 1 are connected with a bottle or the like, and the gate crane is fixed to the support support (FIG. 7).

The electric motor 16 rotates the pinion 17 clockwise in the figure via the sprocket/cheno 19.The manual girder 4 is provided with a rack 18 that meshes with the pinion 17, so that the clockwise rotation of the pinion 17 is prevented. Accordingly, the rack is pushed out to the left in the figure (Figure 8), and at the same time, the hand-stretched girder 4 is pushed out to the left on the guide shaft 2o provided on the support column, and is stopped at the position shown in Figure 4. . The gate crane and lifting equipment [12] have a structure that can be shifted laterally (Fig. 7), so the new girder 3 placed on the support column 1 as shown in Fig. 4 is (Fig. 5), and is fixed to the pillars 1, 1 to complete the erection. Finally, fixed arm 1
3 and the bracket 15 are released, and the gate crane moves to the position shown in FIG. 6, completing one cycle of work. Note that the hand girder feeding mechanism (pinion rack) can be provided on both the left and right sides as shown in Fig. 7, and the left and right electric motors, and therefore the left and right pinion racks,
By separately controlling the feeding of the hand-stretched girder,
It is also possible to adjust the left and right sides separately.

Effects of the Invention According to the present invention, after completing the construction of a new girder for a certain span, when constructing the next span, one hand-stretched girder is constructed using a truck crane,
Since it is possible to move horizontally one span on the support using the power of the gate crane without using a lifting device such as a bifurcated lifting device made by M, the construction period can be greatly shortened, and
This has the effect of reducing construction costs. It can be especially effective when erecting new girders in locations where trucks and cranes cannot be used due to geographical conditions.

Further, by providing hand girder feeding mechanisms (lateral movement devices) on the left and right sides and controlling each one individually, the hand girder feeding can be adjusted separately for the left and right sides.

[Brief explanation of drawings]

Fig. 1: Preparation for erection of new girder Fig. 2: New girder is carried onto the erected span Fig. 3: Gate crane is moved onto the erected span Fig. 4: Manual girder is paid out for one span Fig. 5; The new girder is set and fixed in the frame setting position Fig. 6; The gate crane moves and the preparation for the next new girder erection is completed. Fig. 7; Schematic structure of the gate crane Fig. 8; Manual girder feeding mechanism code Description 1; Track girder support 2; Existing girder 3.3'; Newly erected girder, A, A'; Newly erected span 4
;Hand-stretched girder (girder part); 5;Hand-stretched girder (pilot part); and;Gateway crane 7;Girder transport trolley (8, 9, 10; missing numbers) 11;Gateway crane Gatework 12;Same as above Lifting device 13 Same as above Fixed arm 14; Same as above Gate support wheel 15; Gate crane fixing bracket and pin 16; Gate crane electric motor 17; Same as above Pinion 18; Rack (hand girder side) 19; Gate crane sprocket/cheno 20: Hand Extended girder guide shaft \ ~ % <e'-cq ward Figure 2 = Kororo = Ko Indai° Kari 23 Figure t Date 7'o 7/To, Naenon

Claims (1)

[Claims] In a girder erection method for an elevated double-track track using a gate crane, hand girder, and girder carrier, a rack installed on the hand girder is driven by an electric motor and power transmission device installed at one end of the gate crane. , a method for constructing a track girder for an elevated double-track track, characterized in that the hand-stretched girder rests on the support for one span so that it can move horizontally.