JPH0424482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for replacing lines such as railways and roads.

Various switching methods have been developed to change the height of roads and railway lines currently in use.

These are the construction of viaducts and underground lines above and below the current line, and once the structure is completed, a diagonal connecting passage is built from the current passage level to the planned line level once within one night. The construction method was to switch to

On the other hand, the construction method of the present invention differs from those known construction methods in that it raises the height by a small amount in a short period of time at night and opens it to traffic the next morning. This relates to a construction method that involves repeating the above steps and replacing it with a concrete viaduct each time.

This kind of time-consuming work is necessary when the design height of the raised structure is lower than the height of passing vehicles.

In other words, in this case, it would be impossible to allow vehicles to pass and build an elevated bridge at the same time, since the bridge would collide with vehicles.

To deal with this situation, there is a method to raise the height of the track over a long period of time by putting a little bit of gravel under the track every night and compacting it, but this method requires a huge number of workers. Disadvantages such as the number and amount of gravel, repeated vibrations and noise late at night cannot be avoided.

The present invention has been made in view of these points.
The purpose is to provide a construction method that can repeatedly raise the height quickly and accurately during a short period of time late at night when there is no traffic, and then release the building to traffic the next morning.

Next, the construction order will be explained.

<B> Condition of the route in use (Figure 1) We will explain the case where a certain area of the embankment 1 whose upper surface is used by the railway is replaced with an elevated bridge 2 as shown in Figure 2. Of course, it can also be applied to cases where the height of the embankment is made higher or lower.

<B> Placing temporary supports Two or three temporary supports 3 are placed in the transverse direction of the route within the area of the embankment 1 that is scheduled to be replaced.

Multiple temporary supports 3 installed across the route
As one set, temporary supports 3 are placed at regular intervals along the route direction.

<C> Installation of cross girders The temporary supports 3 in opposing positions are connected by cross girders 4 installed in the transverse direction of the route.

Then, a temporary floor 5 is mounted on this cross girder 4.

This temporary floor 5 is a girder or plate body on which rails 6 have already been laid, and has a length approximately equal to the interval between the cross girders 4.

Further, transverse jacks 15 are fixed to the lower surface on both sides of the end.

A bracket 7 is provided protruding from the side of the temporary support 3,
Jyatsuki 8 is mounted on the top surface.

<D> Connecting the temporary floor (Fig. 6) Both ends of the temporary floor 5 are connected by a connecting plate, but only one of the plates is fixed with rivets 12, etc., and the other is drilled with elongated holes 13 to connect them. The plate 11 is made slidable.

Further, an axial jack 14 is positioned between both temporary floors 5, and is used to enlarge and adjust the axial distance between the temporary floors 5.

<E> Raising the temporary floor By extending the jacks 8, the 5 groups of temporary floors once mounted on the cross girder 4 are raised to a predetermined position while ensuring the vertical slope.

Since the temporary floors 5 are connected by the connecting plates 11 when being raised, by raising one temporary floor 5, the adjacent temporary floor 5 will also be raised at the same time.

In this way, each temporary floor 5 is pushed up to incline the route to a range that allows the passage of vehicles as a whole.

The slope of the entire route must be handled by bending each temporary floor itself, and bending at the joint between the temporary floors 5 and 5 must be avoided in consideration of vehicle traffic.

Furthermore, when looking at the route as a whole, the total length of the route increases by the amount that each temporary floor 5 is pushed up.

The amount of change in this total length is determined by the elongated hole 13 of the connecting plate 11.
By moving each temporary floor 5 in the longitudinal direction of the line through the , the temporary floor 5 is dispersed and absorbed.

Once raised, attach another transverse girder, that is, the temporary support girder 9, to the top of the cross girder 4 and attach it to the temporary strut 3.
and the temporary floor 5 is mounted on the temporary support girder 9.

<F> Adjusting the center of the temporary floor The horizontal jacks 15 provided on the lower surface of the ends of the temporary floor 5 are extended and contracted, and the temporary floor 5 is slid on the temporary support girder 9. Then, align the center line with the design line.

Further, if necessary, the dimensions between the temporary beds 5, which have become irregular in interval due to the elongated hole absorbing the change in interval due to the ascent, are accurately adjusted using the axial jack 14.

<G> Construction of viaduct After raising the bridge to ensure sufficient height below the girder, excavate the lower part and remove one part of the embankment.

At the same time, reinforce the space between the temporary supports 3 with diagonal members 10, etc.
Construct viaduct 2 using concrete.

Since the present invention is as described above, the following effects can be expected.

(a) The present invention is to move up and down the planned route in stages by the amount that vehicles can pass through.

Therefore, while ensuring vehicle traffic during the day, it is possible to gradually reassemble the area while traffic is stopped, such as at night.

(b) Construction is safer and more reliable than the method of gradually adjusting the road surface height by piling up wedges or sandbags.

C. There is no need to prepare a separate site for a temporary road surface for the changeover, and all work can be done within the scope of the site currently in use.

Therefore, even if the area is crowded with people, problems such as land acquisition and eviction of people will not occur.

D. The materials, tools, machines, etc. used for construction are all versatile and inexpensive, and it is extremely economical as it does not require manual labor late at night as in conventional construction methods.

E. Since the temporary floors are connected, there is no need for a jack for each temporary floor, and the number of jacks can be greatly reduced.

F. The temporary floors are connected by connecting members with elongated holes so that they can expand and contract in the direction of the route.

Therefore, when raising the temporary floor group in an inclined state, the connecting member absorbs the gap, so even if the vertical jack is extended straight, no horizontal force is applied to the jack, and forced operation can be avoided.

G. After the temporary floors have been raised, the spacing between the temporary floors and the left and right adjustments can be quickly made using a group of dedicated jacks, so it is possible to quickly adjust the spacing between the temporary floors and adjust the left and right directions, so it is possible to quickly adjust the spacing between the temporary floors and adjust the left and right directions. It can be carried out without giving anything.

[Brief explanation of drawings]

Figure 1: Explanatory diagram of the embankment state, Figures 2 to 10
Figure: Explanatory diagram of construction status. 1: Embankment, 2: Viaduct, 3: Temporary support, 4: Cross girder, 5: Temporary floor, 6: Rail, 7: Bracket,
8: Jyatsuki.

Claims (1)

[Scope of Claims] 1. In a route resurfacing method in which the height is raised step by step to the designed resurfacing height by an amount that allows vehicular traffic, a plurality of temporary supports are installed in the transverse direction of the route within the range of the route's right-of-way. Temporary supports made up of the above-mentioned sets are installed at regular intervals along the route direction, cross girders are erected between these temporary supports, and on top of each cross girder are the structures to be replaced. The temporary floor that makes up the route is placed so that it can expand and contract along the direction of the route, the temporary floor is pushed up with jacks, and then temporary support girders are erected between the temporary supports cast in the transverse direction of the route and the temporary floor is pushed up. The floor is replaced, then opened to traffic, and the temporary floor is repeatedly pushed up, replaced, and opened to traffic until it reaches the route scheduled for replacement. After removing the conventional structure under the temporary floor, the temporary floor is opened to traffic. A route replacement method characterized by constructing a new support structure in the space below the floor.