JPH0244995B2 - RUUFUKETASEKOHOHOOYOBISONOSOCHI - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for the operation of trains, etc. above when constructing underground structures such as under live wire tracks, underground passages, water supply and sewerage systems, and public ditches. This invention relates to a track protection method and device that enables construction without any problems.

[Conventional technology]

Conventionally, when constructing underground structures under shallow earth-covered tracks of live lines using trenchless construction methods such as propulsion construction methods, traction construction methods, and propulsion traction construction methods, it has been difficult to construct underground structures without interfering with the operation of trains, etc. above. requires complete orbital protection. It had a pipe roof installed underground between the upper track and the underground structure.

[Problem that the invention seeks to solve]

Conventionally used pipe roofs involve inserting and installing pipes by machine digging into the ground beneath the tracks, which requires precision, so even with highly sophisticated technology, it is difficult for the reaching side to remove the pipe ends. It was difficult to line them up horizontally, resulting in uneven ground, and it was necessary to take this into account by thickening the earth cover to some extent. In this case, by thickening the earth cover, the underground structure becomes deeper and the attachment part to the underground structure becomes longer, which not only increases the construction cost but also requires a long construction period, which is unnecessary. It's the economy.

Furthermore, after constructing the underground structure, it is desirable to remove the pipe roof for track maintenance and management purposes, but since removing it requires construction costs and time many times the installation cost, it is not recommended to leave it underground. Must. In addition, in order to prevent the remaining pipes from corroding and causing the roadbed to cave in, there is a big problem in that it is necessary to do something extremely uneconomical, such as filling the pipes with mortar and burying them.

Furthermore, when constructing an underground structure under the track using a press-in method such as a push-in method or a towing method, in which a previously completed underground structure is pressed into the ground, a pipe roof, which is a track protection work, must be installed after construction. Otherwise, there is a problem that the work place for inserting the pipe and the place for preparing the press-in of the underground structure will conflict, making it impossible to carry out the preparation work for press-fitting the underground structure and lengthening the overall construction period. .

[Purpose of the invention]

This invention eliminates the above-mentioned major problems with conventional pipe roofs, and provides an excellent roof girder construction for track protection that can be constructed safely, reliably, without the need for difficult technology, and most economically. The object of the present invention is to provide a method and an apparatus thereof.

[Means for solving problems]

In order to achieve this object, the present invention employs the following characteristic configuration. That is, in the method and device for constructing a roof girder for protecting a track according to the present invention, fixing beams are installed parallel to the track on both sides of the track, and are constructed below the lower part of the sleeper in the direction perpendicular to the track. It is constructed by rigidly attaching a group of steel types such as H-shaped steel and I-shaped steel, which are wider than the outside width of the underground structure and arranged like a roof, and anchoring beams one by one.

[Effect]

With this configuration, the roof girder for protecting the track can be made to an appropriate depth,
Alternatively, it is also possible to place the sleepers directly on the group of shaped steel without any earth covering, and even in this case, trains and the like can be operated safely and reliably without any hindrance to the upper tracks. Furthermore, when excavating and advancing an underground structure, the track can be protected even more safely by providing anchoring beams at both ends of the anchoring beam to prevent movement of the group of steel shapes.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings.

As shown in Figures 1 to 6, in order to maintain the flatness of the roof girder, anchoring beams 3 are laid parallel to the rails 8 on the construction base 2 on both sides of the rails 8, and The earth retaining pillars 9, earth retaining plates 10 and cuts are made in the road bed 6 and roadbed 13 to a required depth to a width that allows insertion of one or more H-shaped steel 5 in the direction perpendicular to the track between trains, etc. Dig a trench 17 while retaining the earth using beams 11, etc., insert the H-shaped steel 5 from the side in a direction perpendicular to the rail 8 into the horizontal ground surface (see Figure 3), and fix the H-shaped steel 5 with bolts, etc. After fixing one by one to the anchoring beam 3 with the tool 12 (see Fig. 5), the track bed 6
etc. is filled into the gap between the H-shaped steel 5 and the sleeper 7 to restore the area so as not to interfere with the operation of trains, etc.
The above-mentioned steps are sequentially repeated to integrally construct the roof girder structure by laying the H-shaped steel 5 horizontally to a required width wider than the outer width of the underground structure 1 to be constructed in the form of a roof.

Note that an inter-line fixing beam 3' may be provided between the fixing beams 3 on both sides.

In addition, if the sleepers 7 interfere with scraping out the roadbed 6 etc. and inserting the H-shaped steel 5 when digging the groove 17,
It is desirable to move the sleepers 7 in the direction of the rails 8 and to relocate the retaining plates 10 (see Fig. 4).

Furthermore, in order to ensure safety, the protruding parts of the anchoring beams 3 that protrude from both ends of the roof girder by a required length are anchored as anchoring beam support equipment in order to prevent lateral movement and/or subsidence of the roof girder structure. Beam supporting piles 4 or, depending on the supporting ground, an anchoring beam support 4' may be installed (see FIG. 5). By firmly connecting these anchoring beam support equipment and the anchoring beam 3,
Safety can be further increased.

After constructing the underground structure 1, it can be dismantled and removed by repeating the reverse steps of the roof girder construction method for track protection as appropriate.

As another example, if there is no earth covering, the earth covering may be made shallow or almost omitted by placing the sleepers 7 directly on the upper surface of the H-shaped steel 5 of the roof girder.

Furthermore, if the track is double track or more, the anchoring beam 3 is laid parallel to the rail 8 on the construction base 2 between the lines or at the required height, and the above steps are repeated as appropriate to protect the track. Roof girder equipment can be installed. In this case, the vertical extension of the roof girder is long;
If it is difficult to insert from one side, insert it from both sides, butt the edges of the H-shaped steel 5 between the lines, and insert the anchoring beam 3.
The installation height may be adjusted by using rigid attachments for each. In addition, as a measure to prevent the roof girder device from moving when the underground structure 1 is press-fitted, struts, etc. are placed between the anchoring beams 3, and support beams 14 are installed on both sides of the roof girder track.
Also, stoppers may be used to prevent movement and ensure the safety of the track. 15 indicates the starting base of the underground structure, and 16 indicates the arrival shaft.

〔Effect of the invention〕

As is clear from the above explanation, this invention was invented as the most suitable for constructing an underground structure at a shallow position under a live line track.
It is possible to provide a method and device for constructing a roof girder for track protection, which can be constructed safely and reliably in normal operation without interfering with the operation of trains, etc. on the upper part, and can be constructed extremely economically without requiring difficult techniques, and Conventional pipe roofs require a thick earth cover, are difficult to construct, require advanced technology, and are constructed by inserting and connecting pipes, which requires a long construction period and high construction costs. Not only is it necessary to remove the pipe roof after constructing the underground structure, but it is preferable for upper track maintenance and management purposes. However, in order to prevent the roadbed from collapsing later on, the most uneconomical aspect is that the pipe must be filled with mortar and buried. On the other hand, the present invention does not involve the above-mentioned uneconomical problems; instead, trenches are dug to the required depth under the tracks within the workable range between trains, and H-shaped steel etc. are installed on the horizontal ground surface to form a roof. The roof girders are laid out side by side and fixed firmly to the anchor beams one by one, and the gaps between the H-beams, etc. and the sleepers are filled with roadbeds, etc., and pounded and hardened, making it stable, and without requiring difficult techniques. Since the device can be set to an appropriate height, there is an effect that the safety of trains, etc. is ensured without deforming the upper track.

Furthermore, after the underground structure is constructed, it can be removed by repeating the construction procedure in reverse as appropriate, which is not only convenient for subsequent track maintenance, but also removes items such as roof girder equipment for use in the next construction. It is extremely economical as it can be reused. Additionally, it is possible to install the roof girder device up to the bottom surface of the pillow tree.
The fact that the earth cover of the underground structure can be made shallow by this means that the installation part can be shortened, which is economical because it can save construction costs and shorten the construction period.

Furthermore, in the conventional track protection method using a pipe roof, preparations for excavation of the underground structure cannot be made until after the pipe roof is installed, which requires a correspondingly longer construction period. Since the roof girder device can be installed without using a roof girder, the construction can be carried out in parallel with the preparation for excavation of the underground structure, which has the great advantage of shortening the construction period.

As described above, the present invention not only enables the construction of underground structures in a shallower depth than the protection method using pipe roofs, but also exhibits an extremely economical effect that significantly shortens the construction period. It is what it is.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment in the case of double track, FIG. 2 is a vertical cross-sectional view of FIG. 1, and FIGS. 3 and 4 are
A detailed cross-sectional view for explaining the installation process, FIG.
FIG. 6 is a plan view of FIG. 5. 1... Underground structure, 2... Construction base, 3... Anchored beam, 4... Anchored beam support pile, 4'... Anchored beam support base, 5... H-shaped steel, 6... Road bed, 7... ...Sleeper, 8...Rail, 9...Earth retaining column, 10...Earth retaining plate, 11...Strut beam, 12...Fixer, 13...Road base, 14...Support beam, 15...Starting platform, 16 ……
Reach pit, 17...ditch.

Claims (1)

[Scope of Claims] 1. A method for installing a track protection girder used for constructing a shallow underground structure under a track, which comprises the steps of: installing anchoring beams parallel to the track on both sides of the track; The shape steel 1 is placed below the lower part of the sleeper in the direction perpendicular to the
The process of excavating one or more trenches, inserting the steel mold into this groove, then firmly attaching it to the anchoring beam, and backfilling the trench are repeated as appropriate to remove the steel mold underground. A method of constructing a roof girder for track protection, which is characterized by laying the girder wider than the outside width of the structure. 2. A track protection girder used when constructing an underground structure in the shallow ground below the track, which is an anchoring beam installed parallel to the track on both sides of the track, and a support beam placed below the bottom of the sleeper in a direction perpendicular to the track. 1. A roof girder device for protecting tracks, characterized in that it is comprised of a group of shaped steels arranged in a roof-like manner wider than an underground structure and rigidly attached to the anchoring beams by anchoring devices.