JPS60188505A - Construction of temporary constructed bridge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a construction method for temporarily constructing a pier or a bridge.

BACKGROUND OF THE INVENTION Conventionally, the method of constructing a pier or a bridge consists of the construction of piers and the subsequent construction of girders, and this is the same even for temporary bridges.

By the way, even for temporary bridges, the work of driving piles equivalent to 1n legs required large equipment, and the work cost using it was also large.

Avoid this difficulty! Conventionally, floating piers or floating bridges have been used, but these have poor horizontal and vertical stability and are unreliable in their ability to support loads.

[1] This invention solves the above-mentioned drawbacks of the conventional method and provides a method for constructing a temporary bridge that is easy to construct and has good stability and reliability.

Structure This invention provides a push finger having a watertight elongated box-shaped 4M structure that can float on the water surface like a ship's hull, an antibody that is engaged with the push finger so as to be able to rise and fall freely, and this antibody on the push finger. Place the temporary bridge part side that has fixable members etc. at a predetermined position, lower the antibody at that position, touch the tip to the bottom of the water, fix the antibody to the pusher finger, and then attach the watertight pusher finger. The weight of the push finger and water is applied to the pile body by placing water inside) and the weight of the water is driven into the bottom of the water, and after the body sinks to a depth that can withstand a specified load m, This method of constructing a temporary bridge includes the steps of fixing push fingers in position, draining water inside the push fingers, and covering them.

The basic idea of this invention is summarized as follows.

1. Fill the push finger with water, use the weight of the push finger and the water to drive the antibody to the bottom of the water, and assume that the antibody stops sinking when the water-filled push finger completely appears above the water surface.This state is as follows. The sum d1 of the dead weight of the push finger and the weight of the water balances the supporting force of the pile body.

2. If the water inside the push finger is drained in this state, the supporting force of the stake body should have a surplus equivalent to the weight of the water inside the push finger.

This becomes the supporting capacity of a pier or bridge.

3. Furthermore, as an application of this, if the water in the push finger is drained and the push finger is left floating in the water (), a buoyancy equivalent to the amount of water discharged can be obtained, which increases the supporting capacity of the pier or bridge. will increase.

Piers and m-beams constructed temporarily using this method are supported by pile bodies, so their positional stability is better than that of floating bridges.

An example of this invention will be explained with reference to the drawings.
Figures a to f explain the process of implementing the present invention in places where the water level fluctuates, such as on the coast.

FIG. 2 is a partially cutaway plan view showing the structure of a specific example of the pusher finger used in the method of the present invention, FIG. 3 is a partially cutaway side view of the pusher finger shown in FIG. 2, and FIG. FIG. 5 is an explanatory diagram showing the structure of the upper part, and FIG. 5 is an explanatory diagram showing the relationship between the antibody and the guide.

First, as shown in FIG. 1-a, the push finger 1 is towed to a predetermined position near the coast, and the pile body 2 is lowered so that its tip touches the seabed.

Next, as shown in FIG. 3, a cap 3 having a pulley at the top is attached to the tip of the pile body 2, and a suspension cable 4 is installed. One end of the suspension cable 4 is wound up by a winch 16.

The inside of the push finger is divided into four water tanks 12 separated by partitions 1513, and in the center there is a pump chamber 15 equipped with a water supply and drainage pump 11, a water intake valve 6, and a water supply and drainage valve 7 communicating with each water tank 12. A water supply and drainage pipe 5 from the water supply and drainage pump 11 is connected to a water supply valve 8 provided on the partition wall 13 of each water tank and an overall drainage valve 9, and these valves and the pump supply +71 water to each water tank. Can be controlled.

The pile body 2 is a pile attached to the outer wall of the push finger 1.

When the grounding of the pile body 2 and the erection of the suspension rope 4 are completed, the water intake valve 6 is opened to introduce water into the pump chamber 15, and the water supply and drainage valves 7 of each water tank are opened to introduce water into each water tank 12. 1st
As shown in Figure b, the push finger 1 begins to sink. When the required amount of water enters the water tank 12, the water intake valve 6 and the water supply/drainage valve 7 are closed.

If the tide level is to be used, the work up to this point should be carried out at high tide, and then the ropes will be stretched out until low tide as shown in Figure 1-0.

At this point, the total weight of the push finger 1 and the water that has entered the water tank 12 acts on the pile body 2, so that the pile body 2 is driven into the water bottom.

In the case of inland water where fluctuations in the tide level are small or not at all, the effect on the pile body will be the same if the winch 1G is activated to wind up the suspension cable 4 and raise the push finger 1 above the water surface.

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The balance of the push finger 1 is maintained by the operation. At this time, the water weight in each tank 12 is finely adjusted by operating the water supply/drainage valve 7, water supply/drainage pump 11, and water supply valve 8 to each tank, thereby reducing the horizontal load of the push finger 1 and the load on the 6 stakes. Adjustment lever.

Once the sinking of the 6 piles has stabilized, drain the water. To do this, listen to the intake/discharge valve 7 and drain valve 9 of each tank, operate the pump 11 while introducing water into the pump chamber 15, and discharge the water flowing out from each tank 12 from the drain port 10. .

This completes the preparation for stake driving and pushing. After this, depending on the usage situation as a pier or a bridge, Figure 1-d
If the suspension rope is loosened and the push finger is lowered so that part of it is submerged in the water, the remaining power to withstand the load will be increased by the amount equivalent to the drainage m of that part.

After the temporary piers or bridges have been used, they are removed and the piles are either submerged using the steps described above, or the piles are cut while the water level is lowered using low tide.

The cut is made at a position below the position of the lower guide when the pile floats again (position m in Figure 1-e).

The pusher finger 1 can be floated or the pusher finger can be moved upward using high tide, and when the position of the lower guide 14 is higher than the top of the cut pile, the pusher finger can be detached from the pile body 2. .

Effects As explained above, according to the present invention, the pile driving work can be carried out at the same time as the girder material is being erected, without the need for the pile driving work. : Temporary bridges can be easily installed and removed.

[Brief explanation of the drawing]

Figures 1-a to 1-f are explanatory diagrams showing the steps of a specific example of the present invention, and Figure 2 is a partially cut plane showing the structure of a specific example of the pressing finger used in the method of the present invention. Figure 3 is a partially cutaway side view of the pressing finger in Figure 2 above, Figure 4 is an explanatory diagram showing the upper part of the antibody 14349, Figure 5 is a diagram showing the relationship between the antibody and the guide. It is an explanatory diagram. 1... Pressing finger, 2... Pile body, 3... Cap, 4...
... Suspension rope, 5... Water supply and drainage pipe, 6... Water intake valve, 7.
... Water supply and drainage valve for each water tank, 8 ... Water supply valve, 9 ... Overall drainage valve, 10 ... Drain port, 11 ... Water supply and drainage pump, 12 ... Water tank, 13 ... Partition wall , 14...Pile guide, 15...Pump empty, 16...Winch,
A... Scale indicating the tide level, ■... Cutting position of the pile, Patent applicant: Kenji Matsumura, Patent attorney: Hide Komatsu, Attorney: Hiroshi Asahi, Patent attorney

Claims (1)

[Claims] A pusher finger having an elongated, water-like box-shaped structure that can float on the water surface like a ship's hull, a stake body J3 that is engaged with the pusher finger so as to be able to rise and fall freely, and this pile body is fixed to the pusher finger. A hypothetical bridge member having a member to be obtained is placed at a predetermined position, the antibody is lowered at that position, its tip is grounded to the bottom of the water, and the pile body is fixed to the pusher finger, and then the antibody is placed inside the watertight pusher finger. By not filling the pile with water, the weight of the push finger and water acts on the pile body, the antibody is driven into the water bottom, and after the pile body sinks to a depth that can withstand the specified load, the push finger is pushed into the specified position of the pile body. fixed,
A method for constructing a temporary bridge that includes the process of draining water from inside the bridge.