JPS6016526B2 - Bridge extrusion construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bridge extrusion construction method, and its object is to a construction method that facilitates extrusion of bridge girders.

The extrusion construction method for bridges involves pushing the bridge girders forward (
When the Yoshiyoshi bridge girder is pushed (or pulled out) and installed on the bridge pier, the bridge girder, which is manufactured in units of several meters to several tens of meters, is manufactured on a production table installed behind the abutment. After the concrete has hardened, a hand-stretched garter is attached to the Yoshiko girder, and the pier is equipped with a temporary support device, such as a sliding member placed on a suitable support such as a steel platform or concrete block. Load the bridge girder and push (or pull) the bridge girder directly onto the bridge girder or by using a pushing device attached to the bridge pier to slide the girder between the bridge girder and the support. ) or by making a movable support by placing the support on a flat plate fixed to a bridge pier etc. so that it can slide, and then loading the bridge girder onto the movable support and supporting it with a pushing device. One method is to push (or pull) a platform on the flat plate and slide it to push (or pull) out the bridge girder.

However, these methods have various problems.

In other words, in any of the above-mentioned methods, the bridge girder reaches the erection position and is erected, so-called pushing (or pulling).
After the installation is completed, it is necessary to remove the temporary support device and then install the regular support device to support the bridge girder. Although it is done in earnest,
Because the amount of elevation of the bridge girder cannot be increased during construction, there is not enough clearance between the bridge girder and the top of the bridge pier, which results in problems such as manual work is often required, and the work is complicated and economically unfavorable. there were.

As a result of various studies in order to solve these problems, the present applicant has previously determined that, based on Tokusho No. 53-15890 and Tokusho No. 53-81972, The construction method shown in Figure 3 is a support device in which a movable part 3 is constructed between an upper shoe 1 and a lower shoe 2, which is generally used as a support for a bridge, for example, the movable part is a rolling type such as a roller or a rocker. A bearing device, a hinge support device such as a pin, a sliding bearing device such as a sliding plate or a bearing plate having a curved surface, a rubber bearing device such as rubber, or a bearing device that is a combination of these are used as the regular bearing device 4 from the beginning, An erection method in which the regular support device 4 functions as a temporary support device during erection without using a temporary support device, and after the erection is completed, the support device 4 is fixed as it is to exhibit the desired support function. , in detail, the upper shoe 1 of the bearing device 4
A sliding member 5 is disposed on top, a movable member 6 made of a thin steel plate or the like that is movable in the bridge axis direction, in other words, in the extrusion direction, is disposed on the sliding member 5, and a bridge girder is disposed on the movable member 6. Using a pushing device directly attached to the pier B or the bridge girder G, push out the guard girder G together with the movable member 6 onto the support device 4 to the erection position, and in this state, press the vertical jack A.
The bridge girder G is lifted up using a screwdriver, etc., the sliding member 5 and the moving part 6 on the bearing device 4 are removed, and the vertical jack A is lowered and the sole plate fixed in advance to the bearing device 4 and the bridge girder G is removed. (Second construction method) that engages and fixes the
(see figure), a temporary support member 7 having a sliding capital 5 is arranged on the upper shoe 1 of the support device 4, and the bridge girder G moves on the temporary support member 7 until it reaches near the predetermined erection position. Push out the member 6 smoothly and attach the connecting member 9 that connects the upper shoe 1 and the sole plate 8 to the sole plate 8 previously fixed to the bridge girder G near the erection position, and in this state, move the bridge girder G again to the erection position. By pressing the end of the temporary support member 7 on the upper shoe 1 with the connection member 9 and pushing it out so as to replace the connection member 9 with the temporary support member 7 and the movable member 6, the bridge girder G is not pushed up. We proposed an erection method (see Figure 3) in which the bearing device 4 and the bridge girder G are engaged.

All of the above-mentioned construction methods involve pushing out the bridge girder G,
A regular support device 4 held in the feeding and winding device
This is accomplished by using a moving member 6 disposed to cover the upper surface of the support device, and by sliding the moving member 6 on a sliding member 5 disposed on the upper surface of the supporting device to supply and wind it up. While this technology has the advantage of not requiring the complicated work of removing the temporary support straightness layer and installing a regular support device upon completion of extrusion, it does not require a supply and winding device for moving members, and it is difficult to move. New problems have been identified, such as the complexity of supplying parts and winding and replacing them. In addition, similar to the above-mentioned technique, for example, Tokuto Sho 53-42083 (Tokukan Sho 54-1135431) has been proposed as a bridge construction method in which bridge girders are pushed out using a regular bearing device. In terms of technology, when extruding the bridge girder, it involves the work of sequentially inserting and removing sliding material between the sliding metal fittings (forming the sliding surface) installed on the upper shoe and the lower surface of the bridge girder.
However, the complexity of the work still remains. Furthermore, in order to solve the problems of the above-mentioned secondary girder construction method, the present inventors integrated a movable member made of a thin steel plate on the lower surface of the bridge girder over the entire longitudinal length of the girder, and the movable member We proposed an erection method in which the sliding members temporarily fixed on the upper surface of the bearing device are moved continuously to push out the girders (
Samurai Keisho 53-164273).

Although this construction method succeeded in solving the problems of the substructure, it also raised new problems.

Because the moving parts are made of long thin steel plates, it is difficult to integrate them into the underside of the bridge girder smoothly.Also, if the moving parts were to be transferred after the bridge girder was manufactured, Even if a method of integrating it with the lower surface of the bridge girder is adopted, it is impossible to absorb the unevenness that occurs on the lower surface of the bridge girder, and this causes problems in the sliding members. Additionally, although this is a secondary issue, if the movable members integrated with the underside of the bridge girder are left as they are without being removed after construction, the movable members will rust over time, impairing their aesthetic appearance. . The present invention is based on the above-mentioned special features.
This is an improvement of No. 1164273, in which a smooth layer made of synthetic resin coating or resin mortar is formed on the lower surface of the bridge girder over the entire longitudinal length of the bridge girder, and the smooth layer is temporarily fixed to the upper surface of the bearing device. This method is characterized by a construction method in which the bridge girder is continuously pushed out by sliding the bridge girder.
To be more specific, the first aspect of the present invention is a bridge extrusion construction method in which a bridge girder is continuously pushed out by sliding on a support device fixed to a bridge pier. A lower shoe and an upper shoe constituting the device are fixed by disposing a movable part between them.

[o' Temporarily fix the sliding pad on the upper surface of the upper shoe.

(1) A sole plate is fixed to the bridge girder at a position that coincides with the upper shoe upon completion of extrusion, and a smooth layer made of a synthetic resin coating or resin mortar is formed on the lower surface of the bridge girder over the entire length in the longitudinal direction excluding the sole plate. . 〇 Next, the bridge girder is placed on the sliding member on the upper surface of the upper shoe, and the smooth layer formed on the lower surface of the bridge girder is made to slide on the sliding part Murakami to successively push out the bridge girder. 'Mura: After the extrusion of the bridge girder is completed, the sliding member on the upper surface of the upper shoe is removed and the upper shoe and the sole plate fixed to the bridge girder are connected and fixed.

This invention provides a bridge extrusion construction method consisting of the above-mentioned methods.

In addition, a second aspect of the present invention provides a bridge extrusion construction method in which a bridge girder is continuously pushed out by sliding on a support device fixed to a bridge pier. and the upper shoe are fixed by disposing a movable part between them.

'o- Temporarily fix the temporary support part provided with the sliding member on the upper surface of the upper shoe.

(1) A sole plate is fixed to the bridge girder at a position that coincides with the upper shoe upon completion of extrusion, and a smooth layer made of a synthetic resin coating or resin mortar is formed on the lower surface of the bridge girder over the entire length in the longitudinal direction excluding the sole plate. .

Next, the bridge girder is placed on the sliding member of the temporary support member on the upper surface of the upper shoe, and the smooth layer formed on the lower surface of the girder is slid on the sliding member to successively push out the bridge girder.

'Mura: A connecting member is attached to the sole plate fixed to the bridge girder near the construction location of the bridge girder.

N: Push out the bridge girder further and press the temporary support member with the connecting member, and push out the temporary support member to replace the temporary support member and the connection member.

After replacing the temporary support member and the connecting member, the connecting member and the upper shoe are connected and fixed.

The present invention provides a bridge extrusion construction method consisting of the above.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 10 denotes a support device disposed between the pier B and the bridge girder G, and the support device 10 includes a lower shoe 11 fixed to the pier B and the lower shoe 1.
A movable part 12 disposed on the movable part 1 and allowing displacement of the bridge girder G after construction, or such displacement and expansion/contraction, and the movable part 1
2 and an upper shoe 13 placed on top of the shoe. 14 is fixed to the bridge girder G, and the supporting device 10 is fixed at the erection position.
This is a sole plate that is connected and fixed to the upper shoe 13 of the shoe.

15 is a smooth layer formed on the lower surface of the bridge girder G. The smooth layer 15 is made of synthetic resin coating such as alkyd, vinyl, eboxy, and acrylic, or synthetic resin such as epoxy and polyester, and frogstone powder. The smooth layer 15 is formed over the entire longitudinal length of the bridge girder except for the sole plate 14 which is fixed to the bridge girder G in advance.

The smooth layer 15 is either integrally formed on the lower surface of the girder G during manufacture of the bridge girder G, or is formed by coating the lower surface of the girder after the manufacture of the bridge girder G.

Reference numeral 16 denotes a sliding portion temporarily fixed to the upper surface of the upper shoe 3 of the support device 10.

Next, a method for extruding the bridge girder G and fixing the support device 10 will be described in detail.

A lower shoe 11 and an upper shoe 13 that constitute the support device 10 on the pier B
A movable part 12 is disposed between them to fix them, and a sliding member 16 is temporarily fixed to the upper surface of the upper shoe 13.

On the other hand, on a production table provided behind the abutment, the sole plate 14 is fixed at a position that matches the upper shoe 13 of the support device 10 fixed on the pier B when extrusion is completed to the lower surface, and the sole plate A bridge girder G on which a smooth layer 15 is formed over the entire length in the longitudinal direction except for the girder 14 is manufactured, and the sliding members 16 temporarily fixed to the upper surface of the upper shoe 13 are slid together. The calendar is placed on the sliding capital 16 by moving it (see Fig. 4).

Next, using a pushing device attached to either the pier B or the bridge girder G, the smooth layer 15 formed on the lower surface of the bridge girder G is slid on the sliding member 16 to push the bridge girder G forward.

On the empty production table, concrete is poured onto the bridge girder G that has been pushed forward and is pushed out one after another until the sole plate 14 fixed to the bridge girder G matches the predetermined support device 10.

When the extrusion is completed, that is, when the sole plate 14 and the upper shoe 13 of the support device 10 are aligned, the sliding member 1
6 is removed, and the sole plate 14 and the upper shoe 13 are connected and fixed to complete the construction (see FIG. 5).

By adopting the above-mentioned method, the operational complexity of the above-mentioned technology, that is, the supply of moving members, the replacement work to the winding device, the supply of sliding material, the detachment work, etc., is not required, and the bridge girder G can be smoothly moved. Moreover, continuous extrusion work can be performed.

FIG. 6 and FIG. 7 show the extrusion construction method which is the second invention of the present invention.

A lower shoe 11 and an upper shoe 13 that constitute the support device 10 on the pier B
A movable part 12 is disposed between them to fix them, and a temporary receiving member 17 having a sliding member 16 is temporarily fixed to the upper surface of the upper shoe 13.

On the other hand, on the bridge girder G, a smooth layer 15 is formed over the entire length in the longitudinal direction on the sole plate 14 and the lower surface of the bridge girder G excluding the sole plate 14, as in the construction method described above.

The smooth layer 15 formed on the lower surface of this bridge girder G and the sliding capital 17 of the temporary support member 17 temporarily fixed to the upper surface of the upper shoe 13
The platform is placed on the sliding member 16 by slidingly contacting the same.

Next, the smooth layer 1 is
5 on the sliding member 16 to push the bridge girder G forward.

When the bridge girder G is pushed out and the sole plate 14 fixed to the bridge girder G reaches the vicinity of the erection position of the bridge girder G, in other words, the sole plate 14 fixed to the bridge girder G reaches the vicinity of the support device 10, the sole plate 1
4 and the connecting member 18 is coupled and fixed.

The bridge girder G is further pushed out and the connecting member 18 temporarily supports the member 1.
7 (at this time, the temporary fixation between the temporary support member 17 and the upper shoe 13 is released), the temporary support member 17 is pushed out, and the temporary support member 17 and the connection member 18 are replaced, and the connection portion The village 18 and the upper shoe 13 are connected and fixed, and the construction of the bridge girder G is completed.

By employing the method described above, the above-mentioned figures 4 and 5 can be obtained.
In addition to eliminating the complexity of the work in the first invention shown in the figure, there is an advantage in that it is possible to eliminate the work on the girder G in order to remove the slippery village 16 at the erection position of the bridge girder G. There is.

FIG. 8 shows another embodiment of the sliding member 16.

That is, it shows a mode in which the sliding capital 16 and the rubber elastic body 19 are integrally formed, and the deviation in flatness of the bridge girder G is absorbed by the deformation of the rubber elastic body 19.

The present invention has the above-mentioned configuration, and has a great effect in that by forming a smooth layer on the lower surface of the bridge girder, the bridge girder can be easily extruded and constructed, and the efficiency of the construction work can be improved.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the conventional extrusion construction method, Figures 2 and 3 are explanatory diagrams of the extrusion construction method using a conventional support device, and Figure 4 is the bridge extrusion construction method of the present invention. FIG. 5 is a partially vertical side view of the bearing device after construction, and FIG. 6 is a partially vertical side view of the supporting device of another embodiment when pushing out the bridge girder. , FIG. 7 is a partially longitudinal side view of the support device after it has been erected, and FIG. 8 is a sectional view showing another embodiment of the sliding member. 10: Support device, 1 1: Lower shoe, 12: Movable part, 13:
Upper shoe, 14: sole plate, 15: smooth layer, 16: sliding member. *1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Festival diagram Figure 8

Claims (1)

[Scope of Claims] 1. In a bridge extrusion construction method in which a bridge girder is continuously extruded by sliding on a support device fixed to a pier, (a) a lower shoe and an upper shoe that constitute a support device on the bridge pier; are fixed by placing a movable part between them. (b) Temporarily fix a sliding member to the upper surface of the upper shoe. (c) A sole plate is fixed to the bridge girder at a position that coincides with the upper shoe upon completion of extrusion, and a smooth layer made of a synthetic resin coating or resin mortar is provided on the lower surface of the bridge girder over the entire length in the longitudinal direction excluding the sole plate. form. (d) Next, the bridge girder is placed on the sliding member on the upper surface of the upper shoe, and the smooth layer formed on the lower surface of the bridge girder is slid on the sliding member to successively push out the bridge girder. (E) After the extrusion of the bridge girder is completed, the sliding member on the upper surface of the upper shoe is removed and the upper shoe and the sole plate fixed to the bridge girder are coupled and fixed. A bridge extrusion construction method characterized by comprising the above (a) to (e). 2. In the bridge extrusion construction method in which the bridge girder is continuously pushed out by sliding on the support device fixed on the pier, (a) the lower shoe and the upper shoe that make up the support device on the pier are connected with a movable part between them. Arrange and fix. (b) Temporarily fix a temporary support member provided with a sliding member to the upper surface of the upper shoe. (c) A sole plate is fixed to the bridge girder at a position that coincides with the upper shoe upon completion of extrusion, and a smooth layer made of a synthetic resin coating or resin mortar is provided on the lower surface of the bridge girder over the entire length in the longitudinal direction excluding the sole plate. form. (d) Next, the bridge girder is placed on the sliding member of the temporary support member temporarily fixed to the upper surface of the upper shoe, and the smooth layer formed on the lower surface of the bridge girder is slid on the sliding member to successively push out the bridge girder. (e) Attach the connecting member to the sole plate fixed to the bridge girder near the erection position of the bridge girder. (F) The bridge girder is further pushed out and the connecting member presses the temporary support member, and the temporary support member is pushed out to replace the temporary support member and the connection member. (g) After replacing the temporary support member and the connecting member, the connecting member and the upper shoe are coupled and fixed. A bridge extrusion construction method characterized by comprising the above (a) to (g).