JPH058281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method of constructing a running track for trains.

<Conventional technology> When laying rails on a concrete track bed, there are the following problems.

<B> Sleepers on the concrete track bed must be installed at the correct height and position.

However, the shape of the concrete track bed is not precise, so determining the height and position of the sleepers while inserting wedges is a time-consuming task.

<B> The sleepers must be fixed by placing filler concrete around the sleepers that have been positioned at the specified height and position.

In this way, a double work is required: setting the surface of the track bed concrete somewhat low and then placing filler concrete.

<C> The increased weight of concrete sleepers and filler concrete increases the load applied to the slab.

Therefore, the dimension on the slab side becomes excessive.

<Object of the present invention> The present invention was made to improve the above-mentioned points, and an object of the present invention is to provide the following method of constructing a train running track.

<A> Construction method that allows easy rail height adjustment <B> Concrete pouring work for slab structure
A construction method that can be completed in just one step and eliminates the need for a second pouring of filler concrete.

<Configuration of the present invention> Next, an example of the construction method of the present invention will be explained.

<B> Installation of PC girders Place PC girders 2 in two parallel rows on the abutments and other foundations 1. (Fig. 21) A plurality of embedded nuts 21 are embedded in the upper surface of this PC girder at regular intervals during manufacturing at a factory.

<B> Attaching the bolt (Figure 3) Screw the bolt 22 into the embedded nut 21 vertically.

Therefore, on the upper surface of the PC girder 2, a plurality of groups of bolts 22 (four bolts at each location in the embodiment) are vertically arranged at predetermined intervals.

At the same time, the bottom formwork 3 for pouring slab concrete was installed.
Install between PC girder 2.

<C> Installing the temporary girder (Figure 4) Install the steel plate with bolt holes drilled in multiple locations onto the receiving plate 4.
1, it is installed on the bolt 22.

By rotating a nut 42 located at the bottom of the receiving plate 41, the height of the receiving plate 41 can be set correctly.

The temporary girder 4 is placed on this receiving plate 41 so as to be positioned in the transverse direction of the rail.

The temporary girder 4 is a square column made of steel, and a long hole is opened in the longitudinal direction in the upper surface of the temporary girder 4.

A vertical bolt is set in the long hole so that it can move along the long hole.

<D> Laying the rails (Fig. 5) Rails 5 are laid on the temporary girder 4 in the orthogonal direction.

Temporary fixing tool 51 for temporarily fixing the rail 5 in this case
is movable along the elongated hole of the temporary girder 4, so the position of the rail 5 in the transverse direction can be easily corrected.

Of course, readjustment in the vertical direction can be made at this stage.

<E> Installation of retaining plates, etc. (Figure 1) Since the temporary girder 4 is a temporary member for adjusting the position and direction, a retaining plate 6, which is a plate that permanently holds the rail, is installed on the underside of the rail 5. Be suspended.

An embedded nut 61 and the like are further suspended from the holding plate 6.

Since the rail 5 is already set in the correct direction and height, the holding plate 6 to be suspended from the rail does not need to be measured in height or position, and is simply attached.

If this track is a track for a linear motor car, embedded nuts 7 for attaching the reaction plate may be positioned between the rails 5.

However, since the embedded nut 7 cannot be floated in the air, it is sufficient to connect the rails 5 with a band plate 71 and fix the embedded nut 7 at an accurate position on the lower surface of the band plate 71.

This strip plate 71 will also be removed later.

<F> Placing slab concrete (Fig. 6) Raise the rail 5 etc. to the correct position in the upper space of the PC girder 2, and place the concrete with the embedded bolts 61, embedded nuts 7, etc. hanging from the rail 5. 8.

At this time, leave a groove-like recess around the temporary girder, etc., which will be removed later.

<G> Removal of temporary girders, etc. (Figure 7) After the concrete 8 has hardened, the connections between the temporary girders 4, strips 71, etc. and the rails 5 are dismantled, pulled out to the side, and removed.

This is to prevent signal electricity from flowing between the rails, so it may be possible to insulate them and not remove them.

Since the volume after extraction is small, it is easy to fill the remaining space with mortar 9 or the like.

<Effects of the Present Invention> Since the present invention is as described above, the following effects can be expected.

<B> Before pouring concrete, support the rails with bolt groups and temporary girders.

Therefore, height adjustment and transverse position adjustment are extremely easy.

<B> Concrete is poured after the holding plates to which the rail will be fixed in the future are suspended from the rail, which is suspended in the air at a precise position supported by a group of bolts.

Therefore, the rails are fixed onto the hardened concrete exactly in the designed position.

<C> Therefore, there is no need for the conventional work of arranging sleepers on a slab and adjusting the height, and there is no need for transporting or laying sleepers in places with poor footing.

<d> Since the structure can be completed by simply placing slab concrete, there is no need for conventional filler concrete.

Therefore, unnecessary dead loads are reduced, and the dimensions of the lower structure can be reduced to the minimum necessary.

<E> Conventional technology includes a top suspension type in which a rail is mounted on the top of the main girder of a rail support device in a direction perpendicular to the main girder, sleepers are attached to the bottom of this rail, and then concrete is poured. Construction methods exist.

However, with this method, the main girder is located below the rail in a direction perpendicular to the track, which becomes an obstacle when pouring concrete, and the shape of the formwork is complicated, making the pouring work complicated. .

In contrast, in the present invention, the rails are suspended from the gate members and concrete is placed, so no other equipment exists in the concrete placement space below the rails.

Therefore, there is no problem with concrete pouring, it is only necessary to install formwork on both sides, and the pouring work can be carried out easily.

[Brief explanation of the drawing]

Fig. 1: An explanatory diagram of the state during construction of an embodiment of the construction method of the present invention, Figs. 2 to 7: An explanatory diagram of the construction order 21...embedded nut, 22...bolt, 4
... Temporary girder, 5 ... Rail, 6 ... Holding plate, 71 ...
...Strip board.

Claims (1)

[Claims] 1. Before pouring slab concrete, a rail is placed via a temporary girder on bolts erected vertically in the slab space, and after setting the height and direction of the rail, A method of constructing a train running track by placing slab concrete with suspended rail retaining plates buried.