JPH0424396A - Tunnel lining method and its equipment - Google Patents

Abstract

PURPOSE:To economize the concrete spread work on the whole peripheral wall of a tunnel by casting quick-setting concrete in an upper and a lower formwork set in a gap provided along bedrock, and compacting the concrete with the reciprocating motion of a vibrator to place both formworks in a plane. CONSTITUTION:Formworks X and Y of a formwork unit A are set in the upper and the lower side of a gap provided along bed rock of a tunnel respectively and similarly, and accelerated concrete is spread on the peripheral wall of the face while reciprocating a nozzle 18 in the gap. Then a vibrator 23 is reciprocated to cast and compact the concrete rapidly. Then the lower formwork Y is rotated and transfered to the upper side of the fixed formwork X in a same plane to spray-cast concrete, and similar procedures are repeated to spray- cast concrete on the whole peripheral wall of the tunnel bed rock. Thereby safe and continuous concrete spraying work can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tunnel lining method and apparatus for spraying and pouring concrete into the ground for a tunnel.

[Prior Art] Conventionally, the work of spraying concrete onto the ground for a tunnel has been carried out by spraying concrete onto the ground from a nozzle of a concrete spraying robot. As a result, concrete bounces and concrete falls off the ground (so-called sagging).

[Problems to be Solved by the Invention] Various construction methods and devices have been proposed to deal with this problem, but all of them have low workability, have complicated device structures, and are heavy.

An object of the present invention is to provide a tunnel lining method and apparatus thereof that prevents concrete from splashing and falling, improves workability, and has a simple and lightweight structure.

[Means for Solving the Problems] The construction method according to the present invention involves creating a gap along the ground of the tunnel, setting the formwork vertically flush, and reciprocating the nozzle into the gap to apply quick setting concrete to the face. The concrete is sprayed onto the peripheral wall of the wall and poured into the gap, and the vibrator is moved back and forth to compact and instantaneously set the poured concrete.The lower formwork is rotated and placed above the upper formwork. The method is characterized in that the rapid setting concrete is sprayed and placed on the entire circumferential wall of the face by repeating the same procedure as described above.

The device according to the present invention includes a first columnar member provided on a base rotatable by a rotation means around a horizontal axis of a truck, so as to be able to be raised and lowered by an undulation means, and a undulation means provided at an end of the second columnar member. a second columnar member provided so as to be able to rise and fall freely; and a third columnar member provided at the end of the second columnar member so as to be freely pivotable and rotatable in the longitudinal direction by means of a pivoting means and a rotating means. A formwork device comprising a columnar member and a horizontal main frame provided at the end of the third columnar member by a direction correction means and a pressing means, the formwork having a vertically flush formwork and an upper A rotary moving means is provided to rotate the lower formwork to position it flush above the upper formwork while the formwork is fixed, and an undulation means and an expansion/contraction means are provided on the revolving posts of the trolley. A spray gun comprising a fourth columnar member that can be freely undulated and expanded and contracted, and a base frame that can be freely undulated and rotated at the end of the fourth columnar member by an undulating means and a turning means. A concrete spraying nozzle is provided on a horizontal guide frame which is provided at an end of the base frame so as to be freely rotatable and pivotable by means of a rotating means and a turning means, and a concrete spraying nozzle is provided so as to be slidable by means of a sliding means, respectively. Some are equipped with vibrators.

The above-mentioned means for rotating the formwork includes a U-shaped main frame that opens toward the ground side of the tunnel, a rotating frame that is pivotally supported at both ends of the main frame through rotating shafts, and a rotating frame that is connected to both rotating frames. It consists of a formwork shaft that is pivotally supported at both ends and a motor that rotates both of these formwork shafts, and a formwork is fixed to each of these formwork shafts. A straight line connecting the formwork axis is formed into a substantially equilateral triangular shape, and a rotating shaft is provided at the straight line connecting both formwork axes, that is, at the center of the rotating frame, and with the upper formwork fixed, both motors are connected to both formworks. When the upper formwork is fixed, the reaction force causes the rotating frame to rotate in the opposite direction, rotating the lower formwork and rotating the upper formwork. It is preferable to configure it so that it is positioned flush above the frame.

[Function] In the tunnel lining method and its device configured as described above, during construction, after fixing the trolley, the formwork device is moved by operating each means, and both formworks are placed in the ground of the tunnel. Set them flush with each other with a predetermined gap between them.

Next, the rotating post is rotated and each means is operated to move the spraying device, and each means is operated to reciprocate the nozzle within the gap to spray quick-set concrete onto the ground and into the gap. Pour concrete.

Next, the spraying device is moved in the same manner, and the vibrator is reciprocated to compact and instantaneously set the concrete placed by the vibrator.

Next, with the upper formwork fixed, the rotation moving means and each means are operated to rotate the lower formwork so that it is positioned flush above the upper formwork, and thereafter, the same process as above is carried out. Repeat the procedure to spray and pour concrete around the entire circumference of the ground for the tunnel.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an apparatus for carrying out the present invention, in which a horizontal cylindrical base 31 is rotatably supported on a cart 30, and is rotated by a rotation motor 32. There is. At the end of the base 31, a first arm 34, which is a first columnar member, is supported by a tilt cylinder 33, which is a lifting means, so as to be able to rise and fall freely. At the end of this arm 34, a second arm 36, which is a second columnar member, is supported by a tilt cylinder 35, which is a lifting means, so as to be able to rise and fall freely. At the end of the arm 36, a third arm 39, which is a third columnar member, can be rotated and rotated in the longitudinal direction by a swing cylinder 37, which is a turning means, and a rotation motor 38, which is a turning means. is freely supported. At the end of this third arm 39, the horizontal main frame 1 of the formwork apparatus, which is generally designated by reference numeral A, is pivoted by a direction correction cylinder 2 as a direction correction means and a front pressing cylinder 3 as a pressing means. It is rotatably supported around 1a and around an axis 1b (FIG. 2) perpendicular to the pivot axis. In addition, nozzle 18
is connected to a concrete pumping device (not shown).

Further, a slide boom 41, which is a fourth columnar member that is extendable and retractable by a cylinder (not shown) which is an extendable means, is supported on the swing post 40 of the truck 30 so that it can be raised and lowered by a tilt cylinder 42 which is a raising and lowering means. that boom 4
At the end of 1, a horizontal base frame 10 of the spraying apparatus, which is generally designated by the symbol B, is connected to the horizontal base frame 10 of the spraying device, which is made up of a tilt cylinder 11 serving as a levying means and a swing cylinder 12 serving as a rotating means.
It is supported to freely undulate and turn around the axis.

In addition, the code|symbol 43 in a figure is the outrigger which supports and fixes the trolley|bogie 30 at the time of construction, and is expandable and retractable in the horizontal direction and the vertical direction.

This spraying device B is provided with a working deck 13 on the fly boom 41 side of the base frame 10, and on the opposite side is guided by a tilt cylinder 14 serving as a rotating means and a rotating motor 15 serving as a rotating means. The frame 16 is supported to freely undulate by 90 degrees and turn by 200 degrees around two orthogonal axes. On the lower surface of the guide frame 16,
A nozzle 18 for spraying concrete is suspended on one side (left side in the drawing) downwardly through a slider 17, and the slider is slid by a nozzle slide motor 19 and a chain 20, which are sliding means. .

Further, on the upper surface of the guide frame 16, a slide boom 22 for a vibrator which is extendable and retractable is supported by a cylinder (not shown) which is an extendable means through a slider 21 so as to be able to rise and fall freely, and a vibrator 23 is provided at the end of the boom 22. It is being The slider 21 includes a vibrator slide motor 24 and a chain 25 as sliding means.
It is designed to be slid by.

In FIG. 2, the main frame 1 of the formwork device A is formed in a U-shape that opens toward the ground C (FIG. 3) side of the tunnel.
A pair of rotating frames 5.5 are rotatably supported at both ends of the rotating frame 5.5 via rotating shafts 4.4, respectively. This rotating frame 5
．． Formwork shafts 6a and 6b are rotatably supported at both ends of the formwork rotation movement motor 7, respectively.
It is designed to be rotated by a and 7B. and,
On the formwork shaft 6 a N 6 b, flush formworks X and Y are each fixed by three triangular support plates 8, and members 1.4.5.5a, 5b and 7a, 7b constitutes a means for rotating the formwork XSY.

3 to 7 show the principle of the rotational movement mechanism.

As shown in FIG. 3, when the formworks X and Y are vertically flush, both ends of the surface of the formworks X, Y and the formwork shaft 6a16b
The straight lines connecting the mold shafts 6a and 5b are formed into substantially equilateral triangles, and the rotating shaft 4 is provided at the straight line connecting the frame shafts 6a and 5b, that is, at the midpoint of the rotating frame 5.

Therefore, when the formwork rotation movement motor 7as7b is activated to rotate the formwork XSY in the direction of the arrow a with the formwork X fixed, the rotating frame 5 is moved by the reaction force as the formwork XSY is rotated in the direction of the arrow a. It is rotated in the direction shown in Figure 4, and
Formwork Y is held parallel to formwork X. Next, as shown in FIG. 5, the formwork Y is positioned behind the formwork X, and after passing through the state shown in FIG.
is moved flush above. That is, the rotation axis 4 moves upward by 180 degrees around the formwork axis 6a as shown by a semicircular trajectory C.
The mold frame Y is rotated by 180 degrees in the direction of arrow a with respect to the rotating frame 5.

During construction, after removing the outrigger 43 from the truck 30 and fixing the truck 30, the motor 32, cylinder 33.
35. Operate 37.2.3 and the motor 38 to move the formwork device A to form the formworks X and Y to create a predetermined gap with respect to the ground C of the tunnel, as shown in Figure 3. Set it flush.

The pivot post 40 is then rotated and the cylinder 42.11
and 12 to move the spraying device B, and at the same time operate the cylinder 14 and motor 15.19 to reciprocate the nozzle 18 within the gap of the formwork ) is sprayed onto the ground C and poured into the gap.

Next, while moving the spraying device B in the same manner as described above,
The vibrator 23 is reciprocated by operating the motor 24, and the concrete E placed by the vibrator 23 is compacted and instantaneously set.

Next, with the formwork X fixed, the formwork rotation movement motors 7a and 7b are operated to rotate the lower formwork Y above the upper formwork X, as shown in FIGS. 4 to 7. Moving.

At this time, the motor 32, cylinders 33, 35, 37, and motor 38 are operated to follow the movement of the rotating shaft 4 along the trajectory C (FIG. 3).

Thereafter, the same procedure as above is repeated to spray and cast concrete on the entire circumference of the ground C of the tunnel.

[Effects of the Invention] Since the present invention is configured as described above, concrete can be continuously sprayed into the formwork and concrete can be prevented from splashing or dropping, so it is more efficient than conventional equipment. Safe and economical spraying is possible.

In addition, the structure is relatively simple and can be easily implemented by combining known slide booms, cylinders, and motors, which is convenient.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of a device implementing the present invention, Fig. 2 is a perspective view showing a formwork device, and Figs. 3 to 7 explain the operating principle of the formwork rotation movement device. FIG. A... Formwork device B... Spraying device X1Y...
・Formwork 1... Main frame 2... Direction correction cylinder 3... Forward pressing cylinder 4...
Rotating shaft 5... Rotating frame 6a, 6b --- Formwork shaft
7a, 7b -- Formwork rotation movement motor 10... Base frame 11.14.33.42... Tilt cylinder 12.37... Swing cylinder 15.
...Swivel motor 16...Guide frame 17
．． 21...Slider 18...Nozzle 19.
...Nozzle slide motor 20.25...Chain
22...Slide boom for vibrator 23.
... Vibrator 24 ... Vibrator slide motor 30 ... Dolly 31 ... Base 32.
38...Rotation motor 34...First arm 3
6...Second arm 39...Third arm 40
...Swivel boss 41...Slide boom Fig. 4 Fig. 5

Claims (2)

[Claims] (1) Create a gap along the ground of the tunnel, set the formwork flush above and below, and move the nozzle back and forth into the gap to spray quick-setting concrete onto the peripheral wall of the face and pour it into the gap. ,
After the vibrator is moved back and forth to compact and instantaneously set the cast concrete, the lower formwork is rotated and positioned flush above the upper formwork, and the same procedure as above is repeated. A tunnel lining method characterized by spraying quick-set concrete onto the entire circumference of the face. (2) A first columnar member provided on a base rotatable by a rotation means around the horizontal axis of the cart so that it can be raised and lowered by an undulation means, and an end portion of the second columnar member that can be raised and lowered by a levitation means. a second columnar member provided at the end of the second columnar member; and a third columnar member provided at the end of the second columnar member so as to be freely pivotable and rotatable in the longitudinal direction by a pivoting means and a rotating means. , a formwork device comprising a horizontal main frame provided at the end of the third columnar member by a direction correcting means and a pressing means, the formwork having vertically flush formworks and an upper formwork. The lower formwork is rotatably moved in a fixed state to be positioned flush above the upper formwork, and the revolving post of the truck is provided with a undulation means and an expansion and contraction means to cause the lower formwork to undulate and expand and contract. The spraying device is provided with a fourth columnar member provided with a base frame that can be freely undulated and rotated at an end of the fourth columnar member by a undulating means and a turning means. A concrete spraying nozzle and a vibrator are provided on the horizontal guide frame, which is provided at the end of the base frame so as to be freely rotatable and pivotable by means of a rotating means and a turning means, each of which is slidably provided by means of a sliding means. A tunnel lining device characterized in that it is provided with a.