JP2740449B2 - Wife formwork device and self-propelled formwork device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork apparatus used for primary lining of mountain tunnels and the like, and more particularly, to a formwork wand which is expanded in a semicircular shape along an excavation wall surface. The present invention relates to a wand form device for closing the side, and a self-propelled form device for setting the wand form and the form with a gap on a face or an excavated surface.

[0002]

2. Description of the Related Art Conventionally, in the primary lining of an excavation wall of a mountain tunnel, a movable formwork apparatus having a crawler has been proposed instead of a spraying method. This formwork device is designed to reduce the generation of dust, which is a drawback of the spraying method, and to eliminate the economic loss associated with bouncing of aggregates, etc. The fresh concrete is poured and filled in the gap between the ground and the formwork, and the formwork is released after the required strength is developed to form a smooth lining surface.

FIG. 10 shows this formwork apparatus. In the figure, reference numeral 1 denotes a movable form device, 2 denotes a crawler, 3 denotes a steel form, 4 denotes a jack for expanding the steel form on an excavation wall surface, 5 denotes a rubber tube for stopping a wife, 6 denotes packing. , 7 are ground piles, 8 is an excavated wall surface, 9 is lining concrete previously cast, 10 is a gap, 11 is a casting pipe, and 12 is a face.

[0004]

However, in the above-described lining method using the formwork apparatus, when paying attention to the wedge portion of the formwork, the rubber tube 5 is inflated as a stop for the wife, and the surface of the rubber tube 5 is brought into contact with the excavated wall surface 8. Since the end side of the gap 10 is closed, the circular tube or horseshoe-shaped excavated section has a large degree of unevenness, and the rubber tube 5 has a limit in size even if fully expanded. May not be completely occluded.

[0005] If the wife side cannot be completely closed by the rubber tube 5, fresh concrete cannot be poured into the gap 10, and the work of filling the gap between the surface of the rubber tube 5 and the excavation wall 8 must be performed. It was additional, time-consuming and inefficient. In addition, as shown in FIG.
3 was left unsupported, which was unfavorable for construction and safety management.

On the other hand, as shown in FIG. 12, the end mold 14 and the contacting elastic body 14a are extended horizontally from the end face of the steel mold 3 to the face 12 to make contact therewith. There is a method of pouring fresh concrete into the gap 10 between the ground 7 and the ground. In this case, it is possible to prevent the above-mentioned collapse of the earth and sand. However, in the case of tunnel excavation, when drilling a hole having a designed winding thickness, the reference numeral in the figure of the lining concrete 9 already cast is used. Work for repelling the portion indicated by 15 was required, and the construction period was prolonged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and eliminates the unsupported section in the primary lining of a tunnel and shortens the construction period. It is another object of the present invention to provide a self-propelled formwork apparatus that transports a formwork having this formwork and sets the formwork on a face and an excavation wall.

[0008]

The gist of the present invention to solve the above-mentioned problems and achieve the above-mentioned object is to provide a substantially semi-circular formwork which is installed along an excavation wall with a gap. A wife formwork apparatus in which a required number of formwork members are arranged around the entire circumference of the wife part, wherein the form members are arranged at predetermined intervals in a circumferential direction of the wife part of the formwork, and are arranged in a face direction from the wife part. A cross section rectangular main body that can freely appear and disappear obliquely toward the main body, and is arranged in the circumferential direction so as to close the space between the main body and the main body horizontally from the wive part toward the face. The present invention resides in a wive form device comprising an auxiliary wive form having a rectangular cross section which can be moved in and out, and jacks disposed on the rear end sides of the wive form body and the auxiliary wive form and for controlling the emergence of these. .

A self-propelled formwork apparatus according to the present invention has a substantially semicircular formwork provided on a rotatable base with a gap provided along an excavation wall surface. In the formwork apparatus, the formwork is a wife of the wife formwork apparatus according to claim 1.
A mold, and a mold movement adjusting device that is interposed between the mold and the base and moves the mold in the front-rear and left-right directions of the self-propelled mold device, and further comprising: The formwork movement adjusting device comprises a slide rail, an engagement member fitted to the slide rail and slidingly contacting the slide rail, and jacks provided in the front, rear, left and right directions to slide the engagement member.

[0010]

According to the wife formwork apparatus of the present invention, FIG.
As shown in (b), the end form body 20 disposed in the circumferential direction of the steel form form 3 is obliquely extended in the face direction by a jack, and the tip end portion 21 of the end form body 20 is formed. Face 1
2 and ground 7, and at the same time, the auxiliary wife formwork 22 is extended in the horizontal direction with a jack, and its tip 2
3 abuts against the face 12 to form a gap 10 surrounded by the ground 7, the steel form 3, the main body 20 or the auxiliary form 22, and the existing lining concrete 9 and the face 12. You.

After the fresh concrete has been cast into the gap 10 and the mold has been removed, it is diagonally covered by the end form body 20 toward the boundary between the ground 7 and the face 12.
The insertion angle 24 (θ = 5 °) of the next hole is secured. This is a guide for the next drilling operation.

By providing the form moving adjusting device in the self-propelled form device, it is possible to adjust the gap between the formwork and the formwork on the face side and the excavation wall side of the formwork.

[0013]

Next, the present invention will be described with reference to the drawings. 1 is a partial longitudinal cross-sectional view of the formwork in the formwork apparatus 25 according to the present invention, FIG. 2 is an explanatory view of a gap between the formwork body, FIG. 3 is a line AA in FIG. FIG. 4 is a side view of the movable form device 1a, and FIG. 5 is a front view of the movable form device in which the steel form 3 is expanded along the excavation wall surface. In the drawing, reference numeral 20 denotes a wife form body, 21 denotes an elastic body at the tip of the wife form body 20, 22 denotes an auxiliary wife form, 23 denotes an elastic body at the tip of the auxiliary wife form 22, 24 denotes a cross angle, Reference numeral 25 denotes a wife form device, and reference numeral 26 denotes a jack.

As shown in FIGS. 1 to 3, the structure of the wife formwork device 25 according to the present invention is a substantially semicircular steel formwork 3 having a gap 10 and installed along an excavation wall surface. A required number of form members are provided around the entire circumference of the wive part, and are arranged at predetermined intervals in the circumferential direction of the wive part of the steel formwork 3, and A wand form body 20 having a rectangular cross section which can freely appear and disappear obliquely radially in the direction of the face 12, and a circumferentially arranged face from the wive part which is arranged in the circumferential direction so as to close a gap between the wive form body 20. An auxiliary wive form 22 having a rectangular cross-section, which can horizontally protrude and retract in 12 directions;
And jacks 26, 26a disposed on the rear end side of each of the auxiliary wand molds 22 and controlling their emergence.

As shown in FIG. 1, the wand form body 20 is arranged at a predetermined distance over the entire circumference in the circumferential direction at the wedge portion on the face 12 of the steel form 3 having a radius R. Is done.
The cross-sectional shape is a rectangular box shape, and its longitudinal cross-sectional shape is substantially triangular as shown in FIG. 20
It is slidably housed in a.

A jack 26 is provided on the rear end side of the inside of the main body 20 of the wand form, and a partition wall 20b vertically suspended in the main body 20 of the wive form is connected to a rod of the jack 26. The expansion and contraction of the rod allows the main body 20 of the wand form to be able to protrude and retract from the wive part of the steel form 3.

As shown in FIG. 3 (a), a guide 2 extending integrally from the upper end of the rear end portion of the main body 20 and projecting from the upper surface of the casing 20a.
7 is slidable along the upper surface of the casing 20a. Accordingly, when the jack form body 20 is pushed in the face direction by the jack 26, the guide form 27 moves the wife form body 20 in an obliquely upward direction (shown by a broken line in the drawing).
Will be led to. The angle in the obliquely upward direction is, for example, about θ = 11 °.

The end of the main body 20 of the wife form is fitted with an elastic body 2
1 is fixed so as to be in close contact with the unevenness of the face 12. As an example of the elastic body 21, a single-bubble rubber body is considered. If an open-cell sponge is applied, the compressibility is large and the ability to follow the ground is high, but it cannot be reused because it absorbs the mortar of fresh concrete and hardens. However, a single-bubble rubber body is considered to be suitable as an elastic body to be attached to a wife formwork because it does not absorb mortar and has moderate compressibility.

Next, as shown in FIG. 1, the auxiliary wand formwork 22 has a trapezoidal box shape in cross section, and the wive formwork body is disposed at intervals in the circumferential direction of the wive part. It is shaped so as to close the space between 20. This auxiliary formwork 22
Is necessary because, as shown in FIG. 2 (a), the main body 20 is disposed on the main part of the steel form 3 having a radius R.
Adjacent to the lower part in contact with the lower part,
Even if 0 is set, a gap σ occurs at the upper part. Moreover, when the end form 20 extends obliquely upward, the gap σ further expands, and it becomes impossible to cast fresh concrete for lining.

Therefore, the auxiliary wand form 22 is required to close the gap σ.
Is extended obliquely upward, a gap is formed between the side walls of the adjacent main body of the wife form. Therefore, the auxiliary wife form 22 is extended in the horizontal direction. Therefore, even if the main body 20 extends diagonally upward and the auxiliary main body 22 extends in the horizontal direction, the side walls of the main body 20 and the auxiliary main body 22 are always adjacent to each other. There is no gap due to contact. A sealing material such as the above-mentioned single-cell rubber body is wound around the side wall of the auxiliary wife form 22 in the longitudinal direction to improve the sealing property.

As shown in FIG. 3 (b), a jack 26a is provided at the rear end of the auxiliary wife formwork 22, and the tip of the rod is vertically suspended in the middle of the auxiliary wife formwork 22. The auxiliary wand form 22 protrudes and retracts horizontally (shown by a broken line in the figure) from the wive part of the steel form 3 by the expansion and contraction of the rod.

The elastic body 23 at the tip of the auxiliary wand form 22 is made of an elastic material such as rubber similar to the elastic body 21 described above. An elastic body 2 made of rubber or the like is provided on the upper surface of the steel mold 3 opposite to the face.
8 is adhered in the circumferential direction, and when the steel form 3 is spread on the excavation wall surface, the elastic body 28 comes into contact with the lower surface of the existing lining concrete 9 and is cast into the gap 10. To prevent leaked fresh concrete.

FIGS. 4 and 5 show a movable formwork apparatus 1a having the above-mentioned wife formwork 25. FIG. The movable form device 1a is provided with an outrigger 44 so as to surround the outside of the self-propelled crawler 29, and extends the four leg portions 45 in the vertical direction while appropriately adjusting the length. Then, the steel formwork 3 and the end formwork 25 are set in accordance with the tunnel sectional gradient by fixing the position on the ground. Further, details of a formwork movement adjusting device 36 of the formwork apparatus 1a for moving and adjusting the formwork 25 toward the face 12 and aligning the steel formwork 3 with a semicircular excavation wall surface are shown. This will be described with reference to FIG.

As shown in FIG. 9, the formwork movement adjusting device 36 is a slide rail for longitudinal movement which is arranged side by side along the longitudinal direction of the formwork device 1a on a base 37 which is rotated by the turntable 30. 38, 38 and an engaging member 39 fitted and slid so as to cover the slide rail 38 for front and rear movement from the outside, and a slide for left and right movement arranged below the base 41a and in the left and right direction. A girder-shaped slide member 41 having a rail 40 above the base 41a, and an engagement member 42 which engages with and slides on the slide rail 40 for moving left and right.
And a form support 43 that moves in the left-right direction with a

Slide rail 3 for moving back and forth and left and right
Since it is only necessary that the sliding members 8 and 40 and the engaging members 39 and 42 can slide and move in the respective directions, the shape is not limited to the shape shown in FIG. 9.

A front and rear slide jack 31 shown in FIGS. 4 and 5 is provided on the base 37.
A left and right slide jack 32 shown in FIG. 5 is provided on a base 41 a of the slide member 41. A vertical jack 33 is provided on the form support 43 as shown in FIGS.

If this formwork apparatus 1a is used for the primary lining of a tunnel, the crawler 29 for self-propelling toward the face 12 can be used.
And move the steel formwork 3 with the turntable 30 to about 90 °.
Rotate to face the face 12.

Then, the four leg portions 45 of the outrigger 44 are extended in the vertical direction while appropriately adjusting the length, and fixed to the ground. Thus, the steel formwork 3 and the end formwork 25 are set in accordance with the tunnel sectional gradient. Thereafter, the rear end of the steel mold 3 and the front end of the existing lining concrete 9 are aligned by the front and rear slide jacks 31 by the form moving adjustment device 36, and if necessary, the left and right slide jacks are used. At 32, the position of the shape of the excavation wall surface and the outer shape of the steel formwork 3 are aligned. Thus, the set of the steel mold 3 can be finely adjusted.

Next, the top of the steel formwork 3 is brought into contact with the existing lining concrete 9 by the vertical jack 33, and the expansion jacks 34, 35, 35a mounted on the lower surface of the steel formwork 3 are formed.
And extended along the excavation wall surface as shown in FIG. As a result, the steel mold 3 is brought into contact with the existing lining concrete 9 over the entire circumference, and the elastic body 28 is hermetically sealed so as not to leak concrete.

Then, as shown in FIGS. 3 and 4, the rods of the jacks 26 and 26a are extended to
0 is tilted upward and the auxiliary wand form 22 is moved in the horizontal direction, and the elastic bodies 21 and 23 at the respective tips are brought into contact with the boundary between the ground and the face 12 or on the face 12. Contact

In the control device for controlling the emergence of the jacks 26 and 26a, when the hydraulic pressure of the jacks 26 and 26a increases sharply, the tip of the wand form member such as the wand form body 20 abuts on the face 12. As a result, the extension of the jack rod is stopped.

As a result, the closing of the ground 7 and the face 12 at the end of the steel formwork 3 is completed, and a gap 10 in which the concrete for primary lining is to be cast is formed. Thereafter, fresh concrete is poured from the casting pipe 11 into the gap 10 and filled, and after the poured concrete has developed a predetermined strength, the steel form 3, the main form 20, and the auxiliary form 22 are formed.
Are respectively demolded. Then, as shown in FIG. 8, the steel formwork 3 is folded small and the formwork apparatus 1a is retracted to another place.

As described above, the excavation wall surface of the tunnel is primarily covered with the excavation wall, and as shown in FIGS. 6A and 7, the excavation wall of the tunnel is inclined obliquely upward to reach the boundary between the ground 7 and the face 12. Since the lining concrete is formed toward the hole, the piercing angle 24 at the time of the next drilling is secured and serves as a guide for the next drilling.

[0034]

As described above, the wife formwork device of the present invention is provided on the substantially semicircular formwork installed along the excavation wall surface with a gap over the whole circumference of the wedge portion. A wife formwork device in which a required number of formwork members are provided, wherein the formwork members are arranged at predetermined intervals in a circumferential direction of the wedge portion of the formwork, and are freely obliquely radially protruded from the wivel portion toward the face. Rectangular cross section main body, and a rectangular cross section that is disposed in the circumferential direction so as to close the gap between the main body and the horizontal section and is capable of horizontally protruding and retracting in the direction of the face from the main section. Since the auxiliary wive formwork and the jacks which are disposed on the rear end side of each of the wive formwork main body and the auxiliary wive formwork and control the emergence and disengagement of these are formed, the wive formwork body is It will reach the boundary between the ground and the face diagonally upward from the wife, and the vicinity of the face will be primarily lining, leaving no unsupported sections. Excellent effects referred to as the safety of the upper can be improved. Further, since the insertion angle of the next drilling hole is thereby secured, the lining concrete in the vicinity of the cutting face serves as a guide for the next drilling hole, which serves as a guide for the work and is convenient.

Further, the shape of the lining concrete in the vicinity of the cutting face, which is cut out by the box form body, serves as a marking line for the excavation planning line (see FIG. 7), thereby improving the work efficiency. Therefore, there is an excellent effect that the repelling work when the wife form member is horizontally extended to the face as in the related art is not required, and the construction period is shortened.

The self-propelled formwork device of the present invention has a substantially semicircular formwork which is installed along the excavation wall with a gap on a rotatable base. In the frame device, front
The formwork is a wife formwork in the wife formwork apparatus according to the present invention.
Together, the formwork movement regulating device for moving the front, rear, left and right direction of the self-propelled frame device interposed to said mold between the mold and the base is provided, further, that the mold movement regulating device, the slide Since the rail and the engaging member that fits and slides on the rail and the jack that is provided in the front-rear and left-right directions and slides the engaging member are provided, the end form and the form are separated from the face face and the excavation wall. It is possible to freely adjust the gap between the lining and the primary lining, thereby improving the working efficiency and improving the construction accuracy.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view in the circumferential direction of a formwork in a wife formwork apparatus according to the present invention.

FIG. 2 is an explanatory diagram of a gap of a main body of a wife formwork.

FIG. 3 is a sectional view taken along line AA of FIG. 1 (a) and a sectional view taken along line BB of FIG. 1 (b).

FIG. 4 is a side view of a movable form device provided with a wife form device according to the present invention.

FIG. 5 is a front view of a movable form device in which the form is expanded along the excavation wall surface.

FIG. 6 is an explanatory view (a) of a state where a wife form body is extended.
It is explanatory drawing of the state which extended the auxiliary wife formwork.

FIG. 7 is a view taken along the line CC in FIG. 6;

FIG. 8 is a side view showing a state in which a movable mold device moves in a tunnel.

FIG. 9 is an exploded perspective view of a main part of the formwork movement adjusting device.

FIG. 10 is a partial cross-sectional side view illustrating a state of a primary lining operation by a movable mold apparatus according to a conventional example.

FIG. 11 is a partially enlarged sectional view of the same.

FIG. 12 is a partially enlarged cross-sectional view of a conventional structure for extending a wand form device of a wand formwork in a horizontal direction.

[Explanation of symbols]

 20 Wife formwork body, 21 Elastic body at the tip of wife formwork body, 22 Auxiliary wives formwork, 23 Elastic body at the tip of auxiliary wives formwork, 24 Cross angle, 25 Wife formwork, 26 jack, around 31 Slide jack, 32 left and right slide jack, 33 vertical jack, 36 formwork movement adjusting device, 41 slide member, 43 formwork support. 44 outriggers, 45 legs.

Claims (3)

(57) [Claims] 1. A wand form device in which a required number of form members are arranged along the entire circumference of a wive part of a substantially semicircular form formed along an excavation wall surface with a gap. A wand form body having a rectangular cross-section, which is disposed at a predetermined interval in a circumferential direction of the wive part of the form and is capable of being obliquely radially protruded and retracted from the wive toward the face face; An auxiliary wive formwork having a rectangular cross-section, which is arranged in the circumferential direction so as to close the space between the frame bodies and is horizontally movable from the wive part toward the face face, and has a rectangular cross section; A wife formwork device, comprising: a jack disposed on the rear end side of each of the formwork and a jack for controlling the emergence of the formwork. 2. A self-propelled formwork apparatus having a substantially semicircular formwork provided on a rotatable base and having a gap provided along an excavation wall surface, wherein the formwork is self-propelled. Claim 1
A wedge formwork in the wife formwork apparatus, and a formwork movement adjusting device interposed between the formwork and the base to move the formwork in the front-rear and left-right directions of the self-propelled formwork apparatus is provided. A self-propelled formwork device characterized by the following. 3. The form-movement adjusting device includes a slide rail, an engaging member that fits and slides on the slide rail, and jacks that are provided in the front, rear, left, and right directions to slide the engaging member. The self-propelled formwork device according to claim 2, characterized in that: