JP6080144B1 - Wall construction panel and method for constructing remaining formwork comprising this wall construction panel - Google Patents

Abstract

An object of the present invention is to provide a wall surface construction panel that can be sequentially attached to the inner surface of a tunnel by a simple method even in the middle of excavating the tunnel. A wall construction panel (1) can also serve as a remaining mold (9), is a rectangular shape having a predetermined plate thickness, and is provided in a circumferential direction of an inner surface (3) of a tunnel (2) sequentially formed by excavation. In addition, a connecting portion 20 is formed on the back surface to be slid from the direction intersecting the frame 4. This wall construction panel 1 can be attached to the frame 4 by sliding it from the direction intersecting the frame 4 and inserting and connecting the connection portion 20 into the connection hole 26 formed in the frame 4. The wall construction panel 1 can be easily attached to the frame 4. [Selection] Figure 1

Description

  The present invention relates to a wall surface construction panel that is attached to the inner surface of a tunnel that is sequentially formed by excavation, and a method for constructing a remaining form using the wall construction panel.

The tunnel lining concrete built on the inner surface of the tunnel plays the role of correcting meandering excavation and finishing the tunnel wall surface. A fireproof panel is laid on the surface of the tunnel lining concrete in order to prevent the tunnel wall from being damaged by a mine fire.
In recent years, a huge formwork of a semi-cylindrical heavy equipment enforcement method called a centle (centre for lining) has been used as a formwork for placing tunnel lining concrete (for example, Patent Document 1).

  The centle for lining described in Patent Document 1 is used when constructing concrete for lining on the inner surface of a tunnel where concrete spraying has been completed, and a foam group is installed along the inner surface of the tunnel. Concrete for lining is placed in a placement space formed between the group and the inner surface. And the lining concrete is cured by maintaining the state for a predetermined time.

JP-A-2016-79773

The centle for lining in the cited document 1 is a large-scale device, and is used by being moved into a hole in which the shape of the tunnel is completed to some extent. Therefore, it is not possible to place concrete on the inner surface of the excavated tunnel. Moreover, when placing concrete with the centr for lining of the cited document 1, concrete is typically placed once every two days, the curing time of the concrete is about 18 hours, and the curing time is short.
For this reason, there is a possibility that deformation and cracking of the cast concrete frame due to forcible demolding while strength development is low may occur.

  Therefore, an object of the present invention is to provide a wall surface construction panel that can be sequentially attached to the inner surface of a tunnel by a simple method even when the tunnel is being excavated. Furthermore, it aims at providing the construction method of the residual formwork which can be constructed | assembled sequentially on the inner surface of the excavated tunnel using this wall surface construction panel.

Wall construction panel according to the present invention is a wall construction panels that can combined residual formwork tunnel lining concrete設用, given that can secure insulation performance to prevent performance degradation of the tunnel precursors by premises fire Connected to a rectangular panel body having a plate thickness and a frame provided in accordance with the circumferential shape of the inner surface of the tunnel sequentially formed by excavation , each of which divided the long side of the back surface of the panel body into left and right halves The center of gravity of each of the regions, or the center of gravity of each of the regions obtained by dividing the back surface into four equal parts, and the edges are embedded in the back of the panel body in advance, and the tip of the heel is sharpened And a connecting portion which is a hook hole .

  In the wall surface construction panel of the present invention, the connection portion is a hook-like hook joint whose tip is sharpened, and the hook joint is connected to a connection hole or a notch groove formed in the frame. It is characterized by that.

  In the wall surface construction panel according to the present invention, the frame is formed with a hand-shaped joint with a pointed hook, and the joint is inserted into a hook hole which is a connecting portion.

  In the wall surface construction panel according to the present invention, the connection portion is approximately the center of gravity of each region obtained by dividing the long side of the back surface into two equal parts, or approximately each of the respective regions obtained by dividing the back surface into four equal parts. It is provided at the center of gravity.

  The wall surface construction panel according to the present invention is characterized in that an overlying structure is formed between adjacent outer peripheral edges.

  The wall surface construction panel of the present invention is characterized by being formed of refractory concrete mixed with an organic fiber material or castable refractory.

In the method for constructing the remaining mold according to the present invention, the wall construction panel is attached to a frame in which a connection hole, a notch groove, or a scissors-shaped joint with a sharpened tip is formed. The remaining formwork is constructed, and on the inner surface of the sequentially formed tunnel , a frame is installed in accordance with the shape of the circumferential direction of the tunnel at a predetermined interval in a direction intersecting the frame. The frame mounting process and the wall construction panel are slid from the direction intersecting the frame, and the connecting portion is directly connected to the frame, so that the wall construction panel is fixed to the frame. direction descends from an arbitrary position or in a direction to increase, and sequentially attached panel mounting step to the frame, Da設con in the gap between the tunnel interior and wall construction panel as Characterized in that it comprises a concreting step for pouring lied.

  The method for constructing a remaining mold according to the present invention is characterized in that, in the panel attachment step, the wall surface construction panel is attached to the frame in a direction that descends from an arbitrary position or a direction that rises.

  The wall surface construction panel of the present invention can be attached to the frame by sliding it from the direction intersecting the frame and inserting and connecting the connection portion into the connection hole formed in the frame. Therefore, the wall surface construction panel can be easily attached to the frame.

  In the wall surface construction panel of the present invention, the connection portion is a hook-like hook joint whose tip is sharpened, and the hook joint is connected to a connection hole or a notch groove formed in the frame. Therefore, the wall construction panel can be easily attached to the frame.

  In the wall surface construction panel according to the present invention, the frame is formed with a hook-like joint with a sharpened tip, and the joint is inserted into the hook hole which is a connecting portion. Can be easily attached to.

The connection part of the wall surface construction panel according to the present invention has approximately the center of gravity position of each region obtained by dividing the long side of the back surface into two equal parts, or the approximate center of gravity of each region divided into four parts on the top, bottom, left and right sides. Since it is provided at the position, it can be more stably attached to the frame than those in which the connection portion is formed at a portion other than the position of the center of gravity.
In addition, since the wall construction panel of the present invention has an overlapping structure formed between adjacent outer peripheral edges, the overlapping structure portions of the adjacent wall construction panels overlap when attached to the frame. Then, the wall surface construction panels can be closely spread without generating a gap between the wall surface construction panels. For this reason, the gap between the joints of adjacent wall construction panels is shielded, so that even if a fire occurs in the tunnel, the flame does not reach the concrete (frame) on the back of the panel, and the concrete strength, etc. Can be prevented.

Furthermore, since the wall construction panel of the present invention is formed of refractory concrete or castable refractory mixed with heat-resistant machine fiber material, the wall construction panel can be used even in the event of a fire inside the tunnel. It is possible to prevent the performance such as strength from being deteriorated by burning. Therefore, the recovery period required after a tunnel fire accident can be significantly shortened.
Furthermore, the wall construction panel is made of refractory concrete mixed with machine fiber material or castable refractory material, so that the construction of attaching the refractory panel to the concrete surface can be omitted. Therefore, by using this wall surface construction panel, the construction period can be shortened and the cost can be reduced.

The method for constructing a remaining mold according to the present invention can easily attach a wall construction panel to an arbitrary position on the inner surface of a tunnel that is sequentially formed in the excavation process by following the excavation speed, for example, by manual labor. . In the conventional tunnel lining concrete formwork (centre), concrete is typically cast once every two days. However, in the method for constructing a residual formwork according to the present invention, concrete can be cast continuously every day. Therefore, the construction efficiency of concrete placement is significantly improved.
Also, in the conventional tunnel lining concrete formwork, the concrete curing time is as short as about 18 hours, whereas the wall construction panel constructed according to the present invention is not permanently removed after placing concrete. . For this reason, it is possible to wipe out the deformation and cracking factors of the cast-in concrete frame that have occurred due to forcible demolding while the strength expression is low.

It is a figure explaining the procedure which attaches the wall surface construction panel which concerns on embodiment of this invention to the inner surface of a tunnel. It is a figure which shows the panel for wall surface construction which concerns on embodiment of this invention. (A) Wall construction panel provided with two hook joints, (b) Wall construction panel provided with four hook joints, (c) Partial enlarged view of hook joint It is a figure which shows what the match is formed in the outer periphery of the panel for wall surface construction which concerns on embodiment of this invention. It is sectional drawing of the tunnel in which the residual formwork comprised by the panel for wall surface construction which concerns on embodiment of this invention was formed. It is a figure which shows the state by which the hook joint of the panel for wall surface construction which concerns on embodiment of this invention was connected to the flame | frame. (A) Cross section, (b) Front view It is a figure which shows the state by which the panel for wall surface construction which concerns on embodiment of this invention is attached to the flame | frame. (A) Side view, (b) Front view It is a figure showing the state where the hook joint of the panel for wall construction concerning the embodiment of the present invention was connected to the notch groove. (A) Cross section, (b) Front view It is a figure which shows the panel for wall surface construction which concerns on embodiment of this invention. (A) Wall construction panel provided with two ring members, (b) Wall construction panel provided with four ring members, (c) Partial enlarged view of the ring member It is a figure which shows the state in which the joint of the flame | frame was connected to the hook hole of the ring member of the wall surface construction panel which concerns on embodiment of this invention. (A) Partial enlarged view, (b) Partial enlarged sectional view

A construction method for the wall surface construction panel 1 according to the present embodiment and the remaining mold 9 constituted by the wall construction panel 1 will be described with reference to FIGS.
As shown in FIG. 1, the wall construction panel 1 is slid from a direction intersecting with a frame 4 provided in the circumferential direction of the inner surface 3 of the tunnel 2 formed sequentially by excavating the natural ground 6. Connected and attached.

[Wall construction panel 1]
As shown in FIG. 2, the wall surface construction panel 1 is a rectangle having a predetermined plate thickness. This wall construction panel 1 is formed of refractory concrete mixed with organic fiber material or castable refractory material in accordance with heat resistance performance (900 ° C. to 1800 ° C.) required when constructing a tunnel.
As shown in FIG. 2 (a), two hook-shaped hook joints 10 serving as connecting portions are formed on the back surface of the wall construction panel 1. The hook joint 10 is provided approximately at the position of the center of gravity in each region obtained by dividing the long side of the back surface into two equal parts. In FIG. 2A, a dotted line indicates a line that divides the long side of the back surface into two equal parts.
The hook joint 10 is a plate-like member, and includes a protruding portion 11 that protrudes in the vertical direction with respect to the wall surface construction panel 1, and an insertion portion 12 that is provided at the tip of the protrusion portion 11 in a direction parallel to the wall surface construction panel 1. It consists of. The insertion portion 12 is provided in the longitudinal direction of the wall surface construction panel 1, and the insertion portions 12 and 12 are directed in the same direction.
The hook joint 10 is L-shaped when viewed from the side. Further, the tip of the insertion portion 12 is sharpened (FIG. 2C).

  When the wall construction panel 1 is large in size and weight, four hook joints 10 can be provided as shown in FIG. In this case, the hook joint 10 is provided approximately at the position of the center of gravity in each region obtained by dividing the back surface of the wall construction panel 1 into four equal parts. Even when four hook joints 10 are provided, each insertion portion 12 is provided in a direction parallel to the wall surface construction panel 1 and faces the same direction. In FIG. 2B, a dotted line indicates a line that equally divides the back, top, bottom, left, and right into four.

Furthermore, as shown in FIG. 3, the wall surface construction panel 1 having stepped portions 13 on the long side and the short side of the wall surface construction panel 1 and having an overlying structure formed on the outer peripheral edge can also be used. .
Even in the case where the pegging structure is formed, the hook joint 10 is provided at approximately the center of gravity in each of the respective regions obtained by dividing the long side of the back surface into two equal parts as shown by the dotted line in FIG. . Furthermore, each insertion part 12 is provided in the direction parallel to the panel 1 for wall surface construction, and has faced the same direction.

[Frame 4]
The frame 4 is provided in the circumferential direction of the inner surface at a predetermined interval from the inner surface of the tunnel 2 formed sequentially by excavation (FIG. 1). The frame 4 has a semicircular arc shape and is made of a metal material.
The frame 4 is fixed inside the tunnel 2 by a plurality of anchors 5. The anchor 5 is a rod-like member, one end is connected to the frame 4, and the other end is embedded in the ground 6 of the tunnel 2.
Connection holes 20 are formed in the frame 4 at equal intervals along the shape of the frame 4. This interval is substantially equal to the length of the short side of the wall construction panel 1. The diameter of the connection hole 20 is designed to be approximately the same as the width of the hook joint 10. In addition, the diameter of the connection hole 20 should just be a magnitude | size which can insert the hook coupling 10. FIG.

Next, a method for constructing the remaining mold 9 constituted by the wall construction panel 1 will be described.
The method of constructing the remaining mold 9 includes a frame attachment step of installing the frame 4 at a predetermined interval from the inner surface of the sequentially formed tunnel 2, and the hook joint 10 of the wall construction panel 1 and the frame 4 are connected. A panel mounting step and a concrete placing step for pouring the cast concrete into the gap between the inner surface 3 of the tunnel 2 and the wall construction panel 1.
The method for constructing the remaining mold 9 is to construct the remaining mold 9 sequentially from the middle of excavating the tunnel 2.
In the present embodiment, a method of excavating the natural ground 6 in a stepwise manner and constructing the remaining formwork 9 by the wall construction panel 1 having the stepped portion 13 (overlapping structure) on the inner surface 3 of the tunnel 2 will be described. . In addition, the construction of the remaining mold 9 may be performed manually or using a machine.

[Frame mounting process]
First, as shown in FIG. 4, the upper part of the tunnel 2 (hereinafter referred to as the first region A1) is cut. Next, a plurality of anchors 5 are attached to the ground 6 of the first region A1, and the frame 4 is installed along the inner surface of the tunnel 2 with a certain distance from the inner surface 3 of the tunnel 2. Then, one end of the anchor 5 is attached to the frame 4. By a similar operation, a plurality of frames 4 are attached at predetermined intervals. The predetermined interval is substantially the same as the interval between the hook joints 10 and 10 of the wall construction panel 1.

[Panel mounting process]
Next, the wall surface construction panel 1 is attached to the frame 4 provided on the inner surface 3 of the tunnel 2.
The wall construction panel 1 is slid along the inner surface 3 from the lateral side of the frame 4 (FIG. 1: direction of the arrow), and the insertion portion 12 is inserted into the connection hole 20 as shown in FIG. The hook joint 10 is attached so as to be caught in the connection hole 20. Next, another wall construction panel 1 is similarly attached by sliding along the inner surface 3 from the lateral side of the frame 4. At this time, as shown in FIG. 6, the stepped portions 13 of the adjacent wall surface construction panels 1 overlap each other. In this way, the wall surface construction panel 1 is spread at a desired position on the inner surface 3 of the tunnel 2 so as not to generate a gap between the adjacent wall surface construction panels 1.
The wall construction panel 1 may be attached from any position so that the remaining mold 9 is constructed downward from the arbitrary position, or the residual mold 9 is constructed upward. It can be attached to the frame 4.

[Concrete placing process]
After installing the wall construction panel 1 at a desired position, concrete 7 is placed in the gap between the natural ground 6 and the wall construction panel 1, and the concrete 7 is cured.
After the remaining mold 9 is constructed in the first area, the lower part of the tunnel 2 (hereinafter referred to as the second area A2) is excavated. After the excavation, the remaining mold 9 is sequentially constructed by the same process as described above.
The construction of the remaining mold 9 in the second region A2 is performed while curing the concrete 7 in the first region A1.

The effect of the construction method of the residual mold 9 constituted by the wall construction panel 1 and the wall construction panel 1 according to the present embodiment will be described.
The wall construction panel 1 is attached to the frame 4 by sliding from the direction intersecting the frame 4 (the side of the frame 4) and inserting and connecting the hook joint 10 into the connection hole 20 formed in the frame 4. be able to. Therefore, the wall surface construction panel 1 can be easily attached to the frame 4.
Further, since the hook joint 10 is formed at the position of the center of gravity in the region obtained by dividing the long side of the wall construction panel 1 into two equal parts, it is more stable than the hook joint 10 formed at a portion other than the position of the center of gravity. Then, it can be attached to the frame 4. Similarly, the hook joint 10 can be stably attached to the frame 4 even when the hook joint 10 is provided at the position of the center of gravity in a region obtained by dividing the upper, lower, left and right into four equal parts.

The wall surface building panel 1 according to the present embodiment has a step portion 13 formed on the outer peripheral edge thereof, and when attached to the frame 4, the step portion 13 of the adjacent wall surface building panel 1 overlaps. Therefore, the wall surface construction panel 1 can be closely laid on the inner surface 3 of the tunnel 2 without generating a gap between the adjacent wall surface construction panels 1. Therefore, even if a fire occurs inside the tunnel 2 by shielding the gap between the joint portions of the adjacent wall surface construction panels 1, the flame is applied to the concrete 7 (frame) on the back surface of the wall surface construction panel 1. Therefore, it is possible to prevent deterioration of performance such as strength of the concrete 7.
Further, the distal end of the insertion portion 12 is sharpened so that the insertion portion 12 can be easily inserted into the connection hole 20. Therefore, the wall surface construction panel 1 can be easily attached to the frame 4.

Furthermore, the wall construction panel 1 according to the present embodiment is molded from refractory concrete mixed with machine fiber material or castable refractory material in accordance with required heat resistance performance (900 ° C. to 1800 ° C.). Even if a fire occurs inside the tunnel 2, it is possible to prevent the wall construction panel 1 from burning and performance such as the strength of the concrete 7 from deteriorating.
Therefore, it is not necessary to remove concrete 7 or to cast it again after a tunnel fire accident, and the period required for recovery can be remarkably shortened.
Furthermore, since the wall surface 1 is composed of refractory concrete mixed with machine fiber material or castable refractory, construction for attaching a refractory panel to the surface of the concrete 7 can be omitted. Therefore, by using this wall surface construction panel 1, the construction period can be shortened and the cost can be reduced.

In the method for constructing the remaining formwork 9 according to the present embodiment, the wall construction panel 1 can be easily attached to an arbitrary position on the inner surface 3 of the tunnel 2 that is sequentially formed in the excavation process, following the excavation speed.
In a conventional tunnel lining concrete formwork (centre), concrete is typically placed once every two days. However, in the construction method of the remaining formwork 9 using the wall construction panel 1 according to the present embodiment, the remaining formwork 9 can be constructed even in the middle of the tunnel 2 excavation. 7 can be placed.
Therefore, the construction method of the residual mold 9 according to the present embodiment significantly improves the construction efficiency of placing the concrete 7 as compared with a method using a conventional centle.

Further, in the conventional tunnel lining concrete formwork, the concrete curing time is as short as about 18 hours, whereas the wall construction panel 1 (remaining formwork 9) constructed in this embodiment is used after the concrete 7 is placed. , Never permanently removed. Therefore, it is possible to prevent the deformation and cracking of the cast concrete 7 that has occurred due to the strong demolding while the strength expression is low.
Furthermore, the construction method of the remaining mold 9 according to the present embodiment does not require the use of a large machine such as a centle, so that the cost can be reduced.

  Further, since the wall surface construction panel 1 can be attached to the frame 4 in a direction descending or rising from an arbitrary position, the workability of attaching the wall surface construction panel 1 is good. It can be easily attached from the position.

Next, a modification of the present embodiment will be described with reference to FIG.
This modification is characterized in that a cutout groove 23 is provided in the frame 4 and the lower surface of the insertion portion 12 of the hook joint 10 is hooked in the cutout groove 23.
The protrusion 11 of the hook joint 10 is designed to be longer than the width of the frame 4.
The notch groove 23 is formed on the surface of the frame 4 opposite to the surface facing the wall surface construction panel 1. This notch groove 23 is formed in a semicircular shape. Note that the shape of the notch groove 23 is not limited to a semicircular shape, and may be formed in a V shape or an I shape.

The wall construction panel 1 is attached to the frame 4 by sliding from the direction intersecting the frame 4 and hooking the insertion portion 12 into the notch groove 23 and connecting it.
In this case, the wall construction panel 1 can be easily attached to the frame 4 because it is only necessary to hook the insertion portion 12 into the notch groove 23. Moreover, since the notch groove 23 is formed, the positioning of the wall surface construction panel 1 can be facilitated.

Next, another example of the present embodiment will be described with reference to FIG.
In this embodiment, the wall construction panel 1 is provided with a ring member 24 as a connection portion instead of the hook joint 10, and a joint 25 is formed in the frame 4 instead of the connection hole 20. It differs from the above-described wall construction panel 1.
As shown in FIG. 8A, the ring member 24 has a hook hole 26, and is provided at approximately the center of gravity in each of the regions obtained by dividing the long side of the back surface into two equal parts.
When the wall construction panel 1 is large in size and weight, four hook joints 10 can be provided as shown in FIG. In this case, the upper and lower sides and the right and left sides of the back surface are provided approximately at the center of gravity of each region.
In addition, you may form a pawl structure in the outer periphery of the wall construction panel 1 to which the ring member 24 is attached.

  As shown in FIG. 9, the wall construction panel 1 provided with the ring member 24 is slid along the inner surface 3 from the direction intersecting the frame 4, and the joint 25 is inserted into the hook hole 26. It attaches so that 25 may be hooked in the hook hole 26. Then, the wall surface construction panel 1 is sequentially slid along the inner surface 3 from the side of the frame 4 and attached.

  The wall construction panel 1 can be attached to the frame 4 by sliding from the direction intersecting the frame 4, inserting the joint 25 into the hook hole 26, and connecting to the frame 4. Therefore, the wall surface construction panel 1 can be easily attached to the frame 4.

Although the present embodiment has been described above, the configuration described in the above embodiment can be selected or changed to other configurations as appropriate without departing from the gist of the present invention. .
In the present embodiment, the method of constructing the remaining formwork 9 using the wall construction panel 1 having a piling structure has been described. However, the wall construction panel 1 that does not have a piling structure on the outer periphery is used. Thus, the remaining mold 9 can be constructed. Further, in the present embodiment, the plate-like hook joint 10 is used, but it may be a columnar shape or a prismatic shape.
Moreover, in this embodiment, although the concrete 7 was shown in the gap between the wall construction panel 1 and the inner surface 3, instead of the concrete 7, for example, sand having a fireproof performance, waste material, or the like is embedded. You can also.

DESCRIPTION OF SYMBOLS 1 Wall construction panel 2 Tunnel 3 Inner surface 4 Frame 5 Anchor 6 Ground 7 Concrete 9 Remaining formwork 10 Hook joint 11 Protrusion part 12 Insertion part 13 Step part 20 Connection hole 23 Notch groove 24 Ring member 25 Joint 26 Hook hole

Claims (2)

A wall construction panels that can combined residual formwork tunnel lining concrete設用,
A rectangular panel body having a predetermined thickness that can ensure heat insulation performance that prevents the deterioration of the performance of the tunnel housing due to a premises fire ,
Connected to a frame provided in accordance with the circumferential shape of the inner surface of the tunnel sequentially formed by excavation , approximately the position of the center of gravity of each of the regions obtained by dividing the long side of the back surface of the panel body into two equal parts, Alternatively, a hook-like hook joint with a hook whose end is embedded in the back surface of the panel body in advance and whose tip is sharpened, or a hook at a substantially center-of-gravity position of each region obtained by dividing the back surface into four equal parts. A connecting portion that is a hole ,
A wall construction panel characterized by that. To attach the wall construction panel according to claim 1 to a frame in which a connection hole, a notch groove, or a hand joint of a heel having a sharpened tip is formed, to construct the residual mold The remaining formwork construction method,
A frame mounting step of installing the frame on the inner surface of the tunnel formed sequentially , with a predetermined interval in a direction intersecting the frame, and according to the shape of the tunnel in the circumferential direction ;
The wall surface construction panel is slid from a direction intersecting the frame, and the connection portion is directly connected to the frame, thereby fixing the wall surface construction panel to the frame, and the wall surface construction panel is A panel attaching step for sequentially attaching to the frame in a direction descending from or rising from an arbitrary position ;
Including a concrete placing step of pouring concrete into a gap between the inner surface of the tunnel and the wall surface construction panel,
A method for constructing a remaining formwork.

Images