JP3758468B2 - Compaction filling equipment for tunnel lining concrete - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compacting and filling apparatus for tunnel lining concrete.
[0002]
[Prior art]
In some cases, it is difficult to completely fill the arch and crown of the tunnel construction concrete. The part where the filling is insufficient is a joint portion with concrete in particular, and the cause of the insufficient filling is considered to be the air pocket due to the poor fluidity of the concrete to the already placed side. As countermeasures, conventionally, a method of providing air vents or applying vibration by a formwork vibrator has been adopted.
[0003]
[Problems to be solved by the invention]
However, the above method does not directly vibrate the inside of the concrete, so that there is a drawback that sufficient compacting cannot be performed, filling is insufficient, and flapping occurs on the finished surface.
[0004]
By the way, it is considered that the most suitable method for compacting concrete is to insert a rod vibrator inside the concrete. However, in a tunnel, the winding thickness is as thin as 30 cm, and it is practically difficult for an operator to enter inside and put a vibrator on, or to extend the vibrator from the wife side for a long time. The fact is that it is not implemented from the viewpoint of workability, such as concrete leaking near the edges.
[0005]
The present invention solves the above-mentioned problems, and its purpose is to provide a compacting and filling apparatus for tunnel lining concrete that enables the use of a vibrator near the top when lining concrete is compacted. To do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an opening formed in a part of a mold, and one end of the opening is hinged to cover the opening, and swings inwardly by the hinge. A vibrator holding plate with a flange lowered at the periphery, an insertion hole that is open to the swing end side flange of the holding plate and communicates with the inside of the placement with the holding plate lifted upward, The vibrator is inserted through the insertion hole toward the inside of the placement.
[0007]
Therefore, in the present invention, the concrete is compacted by pulling the holding plate upward with the hinge as a fulcrum and positioning the tip in the concrete, and inserting a vibrator through the insertion hole to give vibration.
[0008]
Further, the Baibure data includes a blowing port in the mold, that is disposed between the existing concrete, in particular improve the compaction properties at the cavity is likely already hitting set near concrete occurs .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a bottom view showing the vicinity of the top end of a skin plate provided with the apparatus of the present invention, and FIGS. 2 and 3 are sectional views taken along lines AA and BB in FIG. 1, respectively.
[0010]
In the figure, a skin plate 1 as a formwork is arranged with a predetermined gap between the inner surface of an already-placed concrete 2 and a shotcrete 3 as a primary lining in a state where the rear end is in contact therewith. The Then, at the top end center CL of the skin plate 1, a blowing port 4 that is a concrete placing entrance is provided in the vicinity of the already placed concrete 2, and concrete is poured therefrom. In addition, in the FIG. 1, the state which covered the blowing inlet 4 is shown.
[0011]
On the left and right of the top center CL, air venting pipes 5 project inward at a predetermined interval along the longitudinal direction, and the fresh concrete C placed especially as shown in FIG. In the state of being driven to the vicinity of the end, air is extracted from here, and concrete flows down through the hose 6 connected through a hose joint or the like, so that the completion of the driving can be confirmed.
[0012]
And the placement compaction device 7 is arrange | positioned at the right and left of the blowing inlet 4. FIG. As shown particularly in FIG. 3, this device 7 is located on the left and right of the air inlet 4, covers the opening 8 formed in the skin plate 1, and can swing toward the upper portion, that is, the concrete placing side. And a vibrating guide plate 10 which is fixed to the lower surface of the skin plate 1 and is reinforced by a reinforcing material around the opening 8. The holding plate 9 is surrounded by the guide plate 10. The holding plate 9 is provided with hinge pins 11 on one end thereof, that is, on both sides far from the already-placed concrete 2, and is supported by the guide plate 10 so as to be swingable.
[0013]
In addition, the flange 12 is integrated in a lowered state around the holding plate 9 to prevent generation of a gap in a state where the flange 12 is moved to the upper side, thereby preventing leakage of concrete from here. Cutouts 14 are formed on both sides of the flange 12, and the cutouts 14 are engaged with locking pins 15 projecting from the inner sides of the guide plate 10 to lower the holding plate 9. 9 is positioned so that the upper surface of 9 is flush with the skin plate 1.
[0014]
A guide pipe 16 constituting a vibrator insertion hole is projected at a predetermined angle at the front center of the flange 12, that is, at a position close to the already-placed concrete, and a handle 17 for opening / closing operation is integrally provided on the left and right sides thereof. It has been. Then, a rod-like vibrator 18 is inserted into the guide pipe 16 at the time of placing the concrete, and compaction work by vibration is performed.
[0015]
FIG. 4 is a half cross-sectional perspective view showing the relationship between the holding plate 9 and the vibrator in the compaction filling device 17 described above. In this figure, the holding plate 9 has a fan-shaped shape extending toward the swing end side of the hinge pin 11, but it may be rectangular as shown in FIG.
[0016]
Next, the work procedure using the above filling apparatus 17 is demonstrated using FIG. First, as shown in (a), prior to placing, the holding plate 9 is pulled up by holding the handle 17 by hand so that the plate surface of the holding plate 9 is flush with the skin plate 1 from the guide pipe. The 16 tip openings are lifted so as to face the inside of the placement. Thereafter, as shown in (b), the vibrator 18 is inserted into the guide pipe 16 and set so that the tip thereof is located in the fresh concrete in the vicinity of the already-placed concrete 2.
[0017]
Next, fresh concrete C is placed, and the vibrator 18 is driven at a stage where the concrete top end reaches the lining top end, and compaction filling work by vibration is performed in parallel. As a result, sufficient defoaming and compaction are performed particularly at the joining position with respect to the already-placed concrete 2, and the generation of cavities can be prevented in advance.
[0018]
Next, when the vibrator 18 is pulled out in a stage where the compaction is sufficiently performed, the holding plate 9 is lowered to the original position by the concrete placing pressure as shown in FIG. In this state, the concrete C is cured.
[0019]
In the above embodiment, the present apparatus 17 is arranged in the vicinity of the joining surface with the already-cast concrete at the top end portion, but it can also be deployed in other places where joining defects are likely to occur. Of course there is.
[0020]
【The invention's effect】
As is apparent from the above description, the compacting and filling apparatus for tunnel lining concrete according to the present invention can perform compaction filling work by inserting a vibrator directly into fresh concrete. Can be improved.
[Brief description of the drawings]
FIG. 1 is a bottom view showing the vicinity of a top end of a skin plate to which an apparatus of the present invention is applied.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a half sectional perspective view showing a relationship between a holding plate and a vibrator.
FIGS. 5A, 5B, and 5C are cross-sectional explanatory views showing a work procedure by the apparatus.
[Explanation of symbols]
1 Skin plate (formwork)
2 Existing concrete 4 Blowing port 7 Compaction filling device 8 Opening 9 Vibrator holding plate 11 Hinge pin 12 Flange 16 Guide pipe (vibrator insertion hole)
18 Vibrator

Claims (2)

An opening formed in a part of the mold and one end of this opening are hinged to cover the opening, and can be swung inward by the hinge, and the flange is lowered around A vibrator holding plate, an insertion hole that opens to the swinging end side flange of the holding plate and communicates with the inside of the placement with the holding plate lifted upward, and is inserted through the insertion hole toward the inside of the placement. A compacting and filling device for tunnel lining concrete characterized by comprising a vibrator. The Baibure data includes a blowing port in the mold, compaction the filling device of a tunnel lining concrete according to claim 1, characterized in that disposed between the existing concrete.

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