JPH0492006A - Setting temporary bridge of hanging structure - Google Patents

Abstract

PURPOSE:To obtain long spans by a method in which a module having temporary towers is provided on both or one side of existing road and three- dimensional crossings are hung down by cables(skew supporters) attached to the tower to form an over bridge. CONSTITUTION:Towers 1 are set on the three-dimensional crossings of modular approach parts M1, M2,..., and back stay cables 2 are attached to the approach side. The three-dimensional crossings 3 are hung down from the towers 1 by stain cables 4. The towers 1 are set on one side or both sides to make the span longer, and the support span is adjusted by the height of the tower 1. The cables 14 are used for sliding of beams from the towers 1 and connected with pins 15 to prevent the transmission of bending moment. The temporary bridge of long span can thus be set in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for installing a temporary bridge that is constructed to secure a transportation route or a traffic route by occasionally crossing a road.

[Prior art] In order to obstruct traffic on existing roads, work areas are set up and traffic regulations are implemented.

If the construction work was to continue for a long time, a fixed bridge would be installed as a permanent structure, or a separate road route would be constructed.

[Problem to be solved by the invention]

Traditional methods obstruct traffic and cause traffic congestion, which can lead to complaints. Additionally, in order to secure a separate route, a new road will be constructed, which will require a long preparation period before construction can begin.

Even when a temporary bridge is installed, its installation and dismantling require the same large-scale regulations as for general bridge construction, and at the same time, large costs are incurred.

Furthermore, conventional temporary bridges are limited to small spans.

[Means to solve the problem]

Zero positioning is achieved by providing a telescopic mechanism on the legs of a module that divides an overpass into appropriate lengths (15m to 20m) to make it transportable. The module is mounted on a trolley such as a trailer and transported to a predetermined location.

Overhangs 2 are used to overhang the facing panels mounted on the modules on both sides of the grade-separated intersections so that they can be installed safely in a short period of time.
Adopt the construction method.

In order to make the intersection longer and lighter, the intersection will have a suspended structure.

[Function] By making the temporary bridge equipment a suspended structure and applying the construction method of suspension bridges or cable-stayed bridges in step 5 when constructing the beams, the span length of the temporary bridge can be increased and the construction can be simplified. can.

〔Example〕

The temporary bridge has module M1 on the keyaki shown in Figures 1 and 2.
．． Install tower 1, which can be easily installed, on the side of the grade-separated intersection of the Mt~7 approach section (in the figure, it is shown as a collapsible type, but an assembled method is also possible), and backstay cable 2 is installed on the approach side. , the overpass 3 is 1. The structure is made up of stay cables 4 from tower l.

Figure 1 shows the case where the tower 1 is installed on both sides, and Figure 2 shows the case where it is installed on one side, and the force installed on both sides can be extended over a long span. Also, set the height of the tower to #J! The span length can be adjusted by twisting one knot.

The 1,000-wheel unit is set to a predetermined value i by a self-propelled vehicle equipped with a driving unit 11 and drive wheels 12 or a transport platform such as a trailer.

Regarding the sending out L2 of the girder 13, the two girders 1 (1 spring (Fig. 3)) are erected using the vertical pull 14 from the tower l.The girder and the girder are connected with pins 15. No transmission will take place.

Part 4, Figure 5 shows how to construct a tower. In order to carry out erection in a short time, as shown in FIG. 4, the tower 1 is directly mounted on the module M by pushing it up using a jack 5 through a bottle coupling 6. In Fig. 5, the rectangular parallelepiped blocks 7 are stacked, and the tension bolt 8 is applied to resist the pressure m by metal touch (Fig. 6). Note that 16 is a hook structure for the tension bolt. .

Figure 7 shows another fixing structure for the pull 4. Two fixing blocks 9 with a gap are installed in parallel on the web surface 10 of the girder, and the cable 4 can be attached and detached from the outside of the girder. i
Make it into iJ Noh.

Note that 17 is a soget fixed to the end of the cable 4.

〔Effect of the invention〕

The suspension structure temporary bridge installation method according to the present invention, when constructing a temporary grade-separated intersection that crosses (overbridges) an existing road or railway, installs a module having temporary towers on both sides or one side of the existing road, etc. The following effects can be achieved by suspending and supporting the grade-separated intersection using cables (diagonal struts) installed and attached to the temporary tower.

(1) Long span temporary bridges can be installed in a short time, and there is a certain degree of freedom from short lengths to long spans.

(2) Furthermore, the installation does not require long-term traffic control, and is very effective in locations where there are no height restrictions.

(3) By using a suspension structure for the overpass, it is possible to lengthen the span and reduce the weight.

[Brief explanation of drawings]

FIG. 1(a) is an overall side view showing a first embodiment of the present invention;
Figure 1 (work) is a side view showing the module during running, Figure 2 is an overall t111 side view of the second implementation fNl (one tower),
. Part 3 is an explanatory diagram of the girder feeding method, Part 4 is an explanatory diagram of the evening/no erection method (bin method), Figure 5 is an explanatory diagram of the tower erection method (block method), and Figure 6 (a) is an explanatory diagram of the tower erection method (block method). FIG. 6(b) is an enlarged view of a connecting portion using a tension bolt, and FIG. 7 is a perspective view of a cable fixing structure.

Claims (1)

[Claims] When constructing a temporary grade crossing that crosses (overbridges) existing roads and railways, modules with temporary towers are installed on both sides or one side of the existing road, etc., and cables attached to the temporary towers are installed. A suspension structure temporary bridge installation method characterized by suspending and supporting an elevated intersection using (diagonal supports).