JPS6357600B2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) The present invention relates to a beamless type movable formwork for tunnel concrete pouring, which is intended to simplify assembly and removal and reduce weight in a center for pouring tunnel concrete. This invention is an improved invention of the previous application filed by the applicant of the present application (Utility Application No. 42808/1983).

(Prior art) The circular steel form of the previous application (Utility Application No. 51-42808) has beam members that can freely rotate inward running through both sides of the interior, and the front and rear ends are each supported by support jacks on a trolley. This is an inverted form that is pivoted to the lower end of the side form attached to this beam material and can be rotated upwards.Although the internal space is considerably larger, the weight of the beam material is large and it is attached to the beam material. The rotation mechanism was complicated and expensive.

(Structure of the Invention) In view of the above-mentioned disadvantages, the present invention does not use a beam material, but gives the function of a beam material to the side form. , beamless circular steel form (hereinafter abbreviated as center) 1 is tunnel T
The front high-lift journal jacks 3, 3, which will be described later, are installed in parallel on the front sled base 2 in the segment S of
The front joints 4, 4 and the rear rear truck 5 attached to the
Upper through-pieces 8, 8 and lower through-holes 9, 9 are constructed between rear joint members 7, 7 attached to rear high-lift journal jacks 6, 6, which are arranged in parallel above and will be described later.
Side forms 10, 10, etc., which will be described later, are connected and attached to the.

More specifically, in FIG. 2, sleds 11, 11 are attached to the left and right sides of the lower surface of the front sled table 2, and transverse feed tables 12, 12 are attached to the bases of the front high-lift journal jacks 3, 3. An adjusting threaded rod 13 is provided between the front high lift journal jacks 3, 3 so that the lateral position within the tunnel T can be freely adjusted.
4 is fixed, and the front joint members 4, 4 are respectively fixed to the lower ends of rotating arms 15, 15, which have both ends of this front cross beam 14 pivoted, respectively, facing inward of the tunnel T. Screw jacks 16, 16 for steady rest are attached to the lower surfaces of the joint members 4, 4 facing outward, and buoyancy receiving jacks 17, 17 on the end plate side are attached to the upper surfaces of both ends of the front cross beam 14.

A rubber winding roller 1 is provided on the lower surface of the rear truck 5.
Wheels 19, 19 having wheels 8, 18 are attached, and transverse carriages 20, 20 are attached to the base of the rear high lift journal jack 6, which is arranged in parallel on the upper surface of the rear truck 5. An adjustment threaded rod 21 is provided on the rear high lift journal jack 6,
A rotary arm whose lateral position within the tunnel T of 6 is freely adjustable, and a rear cross beam 22 is fixed between the upper ends of the left and right rear high lift journal jacks 6, 6, and the upper ends are pivotally attached to both ends of the rear cross beam 22, respectively. The rear joint materials 7, 7 are respectively fixed to the lower ends of 23, 23 toward the inside of the tunnel T.
Screw jacks 24, 24 for steady rest are attached to the lower surface of the rear cross beam 22 facing outward, and spacers 25, 25 for receiving buoyancy at the base are detachably attached to the upper surface of both ends of the rear cross beam 22.

In FIG. 3, the front side forms 10, 10
are the front joint materials 4, 4 and the rear joint materials 7, 7.
The upper through-holes 8, 8 are installed between the left and right sides of the respective upper through-holes 8, 8, and the upper through-holes 8, 8, and the respective upper parts of the supports 26, 26, . . . 8 are fixed, and the respective lower parts of these columns 26, 26, . . . 27 is attached and reinforced, and the skin plate of each form is reinforced with stringers 28, 28... to form the side form 10 and the arch form 31, which will be described later.
Inspection windows 29 (Fig. 4) are provided at several locations. A foam telescopic rod jack 3 is installed between the lower portions of the left and right pillars 26, 26 located approximately in the center.
Install 0,30'. The upper ends of the left and right side forms 10 and both ends of the arch forms 31, 31, . 34, 34 to pivot and invert form 33,
33' are respectively rotatable upward, and the tips of the left and right invert forms 33, 33' are brought into contact with oblique contact surfaces 35, 35'.

The brackets 36, 36 provided approximately at the center of the invert forms 33, 33' and the pillars 26, 2
6. Bracket 37 installed almost in the center of...
An invert form telescopic rod jack 38, 38 is attached between the invert form telescopic rod jacks 38 and 37, and the other end of the gauge metal fitting 39, which has one end pivoted to the hinge pin 34 of the left invert form 33, is attached to another hinge pin provided at the lower end of the right side form 10. A bracket 42 is provided on a longitudinal member 41 which is removably attached to the shaft through a longitudinal member 40 and is attached approximately to the center of the right invert form 33'.
and a coupling pin 44 in the insertion hole 43 of the gauge fitting 39.
It can be freely inserted and removed at a predetermined position by
Intermediate buoyancy receiving jack 45 on the upper surface of approximately the center of 8
(Fig. 1, Fig. 4) and attach the arch form 3.
Casting opening fittings 46, 46 (Fig. 1) for pouring concrete are attached to several places of the center 1, and an end plate 47 that closes the gap K with the segment S is attached to the front of the center 1 by end stop fittings 48, 48... It is detachable (Fig. 1), and a lap angle 49 (Fig. 1) is attached to the rear end surface of the center 1, which comes into contact with the concrete waving C in the previous step. Snatch blocks 52, 52 in which the wire ropes 51, 51 of the lever block 50 attached to the upper part of the front high lift journal jack 3 are provided inside the center 1.
and attach the other end to the invert form 3.
3 and 33', respectively, so that it can be rolled up.
The front sled base 2, center 1 and rear truck 5
and center 1 are connected by indexing jacks 53 and 54, respectively.

(Operation of the invention) To explain the operation of the invention with reference to the drawings of the embodiment, in Figs. side form 10
Pull out the hinge pins 34 and 44 that pivotally connect the lower end of the gauge bracket 39 to the gauge bracket 39, and remove the invert form telescopic rod jacks 38, 3.
8,... is shortened to form an inverted form 33,
33', remove the invert form telescopic rod jacks 38, 38 in the center 1 and the side form telescopic rod jacks in the center, then operate the lever block 50 to remove the wire rope 5.
1,51 to invert form 33,3
3' around the hinge pins 34, 34 in the directions of arrows Q and R, respectively, and then shorten the outer side form telescopic rod jacks 30, 30, . 32 inward to separate the side forms 10, 10, and both the front high lift journal jack 3 on the front sled base 2 and the rear high lift journal jack 6 on the rear truck 5. When it is lowered and the arch form 31 is peeled off, the center 1 becomes free from the concrete lining C.

Next, when the center 1 is pushed in the direction of the arrow P (FIG. 1), the sleds 11, 11 of the front sled base 2 of the center 1 move inside the segment S, and the wheels 19 with the rubber winding rollers 18, 18 of the rear truck 5 move. , 19 move within the tunnel T in the direction of arrow P while holding the center 1 in the center of the concrete volute C formed in the previous step. When the wrap angle 49 on the rear end surface of the center 1 comes to the front end surface of the concrete wrapping C, the movement is stopped, and in the opposite direction, the front high lift journal jack 3 and the rear high lift journal jack 6 are raised to the predetermined positions. to form a predetermined gap K between the upper arch form 31 and the segment S, and then extend the outer side form telescopic rod jack 30 to move the side forms 10, 10 to the rotating arms 15, 15 and 23, 23. The arch form 31 is rotated outwardly to a predetermined position via the
and the outer circumferential surface are the same circumferential surface.
Next, operate the lever block 50 attached to the front high-lift journal jack 3 to release the wire rope 5.
Loosen 1,51 and invert form 33,3
3' in the direction opposite to the directions of arrows Q and R, respectively, to bring the diagonal contact surfaces 35, 35' into contact with each other, and operate the invert form telescopic rod jacks 38, 38 to adjust the outer periphery of the invert forms 33, 33'. Connect the gauge metal fittings 39, 39, . When the connecting pin 44 of the invert form 33' is inserted and fitted, the center 1 can be assembled firmly into an accurate shape. Next, install the side form telescopic rod jack 30' in the center, and move the horizontal feed tables 12 and 20 at the bases of the high-lift journal jacks 3 and 6, respectively, in the lateral direction by operating the adjusting screw rods 13 and 21. Finely adjust the movement so that the center of the center 1 is at a predetermined center position in the tunnel T, and push the front and rear steady rest screw jacks 16, 16 and 24, 24 against the side walls of the outer segment S, respectively. , Attach the buoyancy receiving jack 17 on the end plate side and the intermediate buoyancy receiving jack 45 to extend it to the ceiling of the segment S, insert the buoyancy receiving spacer 25 at the rear end of the center 1, and attach the buoyancy receiving jack 17 on the end plate side to the end plate on the front end surface of the center 1. When the end plate 47 is attached to the stopper 48 and the gap K is closed, all preparations for winding are completed. Next, a concrete injection hose (not shown) is inserted into the upper pouring opening fittings 46, 46, and concrete is injected into the gap K and solidified to complete the concrete rolling C in the next step. . In the same way, the vehicle progresses sequentially in the direction of the arrow P within the segment S of the tunnel T.

(Effects of the Invention) The present invention eliminates the beam in the center and makes the side form share the function of the beam, making it possible to obtain an extremely lightweight center, making the center inexpensive, and shortening the production time. Not only is it large, but it also does not have heavy structural members, making it easy to transport and bring into the tunnel, making it easy to assemble inside the tunnel, which has the great effect of shortening assembly time.

Also, since the beam is eliminated, the cross-section of the internal cavity within the center is widened, making work inside the center easier.

Furthermore, since the through pieces are separated vertically, the installation position of the inspection window is wider vertically, making inspection easier. Also, since there is no beam, it is easy to change the span at the curve installation point. The effect it can have is also great.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a tunnel explaining the use of an embodiment of the present invention, Fig. 2 is an enlarged side view of the same as seen from the front and rear, Fig. 3 is an enlarged central side view of the center, and Fig. 4 is the same arch form. FIG. (Explanation of symbols of main parts), 1... (Beamless circular steel form) center, 2... Front sled base, 3... Front high lift journal jack,
4... Front joint material, 5... Rear truck, 6... Rear high lift journal jack, 7... Rear joint material,
8... Upper threading material, 9... Lower threading material, 10...
Side form, 14... Front cross beam, 15... Rotating arm (front), 22... Rear cross beam, 23... Rotating arm (rear), 26... Pillar, 30, 30'... Form expansion/contraction Bar Jack, 31...Archiform,
33, 33'...Inverted form, 38...
Invert form telescopic rod jack, T...tunnel.

Claims (1)

[Claims] 1. Install a sled on the lower surface of both ends of the front sled stand,
Front high-lift journal jacks are installed vertically in parallel at both ends of the cross feed table on the top of the front sled, allowing the interval to be adjusted freely, and front cross-beams are installed at the upper ends of the left and right front high-lift journal jacks. The front joint material is attached horizontally to the rotating arms provided at both ends of the front cross beam so as to be able to rotate freely, and on the other hand, rubber winding rollers are provided on the lower surface of both ends of the rear truck. Rear high lift journal jacks are vertically arranged in parallel at both ends of the cross feed table on the upper surface of the rear bogie, and the interval can be freely adjusted.A rear cross beam is constructed on the upper ends of the left and right rear high lift journal jacks. The rear splices are horizontally attached facing forward to the rotary arms provided at both ends of the column, and between the upper ends of the struts are fixed vertically to the left and right front splices and the left and right rear splices, respectively. The upper and lower ends are connected by upper and lower through members, and the left and right side forms are fixed between the left and right upper and lower through members, respectively, and the arch form is rotatably attached to the upper end of this side form via a hinge. The invert form is rotatably attached to the lower end via a hinge, and the other end of the invert form telescopic rod jack, which has one end pivoted to the support column, is pivoted to a part of the invert form. A beamless type movable formwork for pouring tunnels, characterized in that one end of the foam telescopic rod jack is pivoted at the lower end, and the other end is pivoted to the lower end of the other support.