JPH0470480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pier used for pouring concrete for a floor portion in tunnel construction, outdoor construction, or the like.

(Prior Art) For example, in tunnel construction, whether or not the passageway from the face to the tunnel entrance is secured has a great influence on all the work.

Therefore, the floor of the tunnel (invert)
When pouring concrete into a tunnel, it is important to minimize the impact on traffic within the tunnel.

To achieve this, conventional invert construction was done in half and the other half was used for traffic.

(Problems with conventional techniques) The conventional construction methods described above have the following problems.

B The Natom construction method, which has been widely adopted recently, requires the entire cross section of the tunnel to be closed as soon as possible.

However, with the above-mentioned construction method, the construction is divided into two halves, which makes it impossible to close them quickly.

(b) By constructing the tunnel in half, incomplete concrete pouring occurs in the axial direction of the tunnel, making it impossible to integrate the important invert.

C. Because one side will be used as a passage for vehicles, it will be necessary to perform mountain retaining work during construction.

D. In the section with spring water, the remaining half of the passage turned into mud during concrete pouring work.
Not only do they impede vehicular traffic, but the ground becomes loose and many structural problems occur.

(Object of the present invention) The present invention has been made to improve the above-mentioned drawbacks, and its purpose is to quickly close the entire cross section of the tunnel without causing any hindrance to traffic inside the tunnel. The purpose of this invention is to provide a pier for concrete construction of the floor part.

(Means for Solving the Problems) Next, an embodiment of the pier for concrete construction of the floor portion according to the present invention will be described.

B. Frame The pedestal 1 is composed of a floor plate 11 and side walls 12 erected on both sides thereof.

Both the floor plate 11 and the side walls 12 are made of a strong and lightweight structure such as a truss.

Further, an entrance-side tilting plate 13 and an exit-side tilting plate 14 are arranged at positions orthogonal to the side wall 12 so that they can be tilted down by jacking or other force, or raised almost vertically. .

Under the floor of the mask of the side wall 12, an underfloor rail 15 is provided in parallel with the side wall 12.

Two underfloor rails 15 are provided parallel to the side walls 12, and a movable cart 4, which will be described later, is slidably attached to each rail 15.

(b) Hydraulic jack Attach the hydraulic jack 2 vertically to the four corners of the pedestal 1.

By expanding and contracting this jack 2, the pedestal 1 can be moved up and down.

C. Wheels The frame 1 is provided with two types of wheels, namely a fixed cart 3 and a movable cart 4.

The fixed trolley 3 is a normal wheel provided under the floor near one end (assumed to be the entrance side) of the pedestal 1.

On the other hand, the movable trolley 4 is slidably attached to the above-mentioned underfloor rail 15 provided on the other side (exit side) of the pedestal 1 by a structure as shown in FIG.

That is, two arms 42 are raised parallel to both ends of the truck 41, and engagement wheels 43 are rotatably attached to the upper ends of the arms 42.

Furthermore, four or more underfloor wheels 44 that rotate in parallel with the underfloor rail 15 are rotatably attached to the trolley 41.

Then, the engagement wheel 43 at the upper end of the arm 42 is rotatably engaged with the underfloor rail 15.

Next, the operating method will be explained.

B. Installation of the pedestal 1 (Figure 3) The pedestal 1 is installed on the inverted concrete 5 that has been completely poured.

At this time, the jacks 2 on the entrance side of the frame 1 are installed on the invert concrete 5, and the jacks 2 on the exit side are installed on the ground near the finished end of pouring (that is, in the unpoured area).

In this state, the inclined plate 13 on the entrance side of the pedestal 1
The inclined plate 14 on the exit side is stretched over the completed concrete 5 and the unexcavated portion.

(b) Excavation (Figure 4) In order to place the next invert concrete, the unexcavated area must be excavated to lower the road surface.

Therefore, the roadbed 6 is excavated. Although traffic is not possible during this excavation, the time is so short that it is easy to adjust the work cycle so as not to interfere with other works.

The excavated earth and sand is loaded onto a truck or the like that has climbed onto the pedestal 1 and is carried out to the outside of the tunnel.

C. Moving the pedestal (Fig. 5) When the excavation is completed by about half of the length of the pedestal 1, move the pedestal 1.

To move it, first shorten all the hydraulic jacks 2.

As a result, the wheels of the fixed truck 3 and the lower surface of the truck 41 of the movable truck 4 come into contact with the concrete.

If the pedestal 1 is pulled in this state with an excavator or the like, the entire weight of the pedestal 1 will be supported by the two types of wheels, so it will easily move forward toward the inside of the tunnel.

At this time, the carriage in the traveling direction is the moving carriage 4, so even if the ground is muddy or uneven, the movable wheels do not have to travel on such bad road surfaces, and the frame can be moved with a small traction force. can move forward.

When the pedestal 1 is advanced by more than half its length,
The weight of the front part of the moving trolley 4 becomes heavier, and the front part thereof becomes tilted.

At that point, advance will be halted and the remaining half of the excavation will be carried out.

D. Repositioning the mobile cart (Fig. 6) When the excavation is completed, extend all the jacks 2 again and lift the pedestal 1.

As a result, the movable trolley 4 is free to slide, so that only the movable trolley 4 is pulled forward and moved.

In this state, if the jack 2 is shortened again and the pedestal 1 is pulled forward, the entire weight of the pedestal 1 will be supported by the underfloor wheels 44 on the trolley 41 and the wheels of the fixed trolley 3, just as before the replacement. Therefore, the gantry 1 can be advanced only by the range that has been excavated in that round.

E. Opening of traffic If the slope plate 14 on the exit side is lowered in this state, the pedestal 1 will connect the road slab 6 to be excavated next time with the already hardened concrete surface, and the pedestal 1 will pass over the pedestal 1. Traffic between the shaft and the face will be free.

F. Placing concrete (Fig. 7) To pour concrete under frame 1,
This can be done by parking a pump truck or other vehicle in a location that does not obstruct traffic and extending the pipe.

The concrete under the pedestal 1 is unaffected by traffic, so it is possible to pour good quality concrete through careful work and allow it to cure sufficiently.

(Effects of the present invention) Since the present invention is as described above, the following effects can be expected.

B. Invert concrete can be placed without dividing the traffic route in half, so concrete can be placed without interfering with other work, which was a bottleneck in conventional work.

(b) Placing concrete on only half of the traffic route and leaving the other half excavated will leave the entire tunnel cross-section unclosed for a long period of time.

By using the pier of the present invention, concrete can be placed over the entire surface of a traffic route. As a result, there is no longer a need to divide the traffic route into two halves and pour concrete, as was the case in the past.

Therefore, the entire cross section can be closed at an early stage after excavation, and integrated concrete can be poured without concrete pouring in the cross-sectional direction.

(c) Since the pier of the present invention moves lightly and quickly using wheels, it is possible to complete the placement of inverted concrete in a short time.

D. In the present invention, one of the wheels that support the pedestal is of a slidable movable type, so that the pedestal can be slid while the movable wheel remains in a fixed position.

Therefore, even if the ground is muddy or uneven, the movable wheels do not have to travel on such rough surfaces, and the platform can be moved forward with a small traction force.

[Brief explanation of the drawing]

Fig. 1: A perspective view of the pier for concrete construction of the main floor portion, Fig. 2: An explanatory view of a moving trolley, Figs. 3 to 7: An explanatory view of the construction order. 1; Frame, 2; Jacket, 4; Mobile trolley, 1
5; Underfloor rail, 5; Concrete, 6; Roadbed.

Claims (1)

[Scope of Claims] 1. A mount for vehicle traffic; a jack for moving the mount up and down; fixed wheels fixed to one end of the mount to support the mount; The concrete floor is equipped with movable wheels that support the pedestal and is configured to move forward by alternately moving the pedestal using the wheels and raising it using the jacks. Construction pier.