JP2003003795A - Tunnel lining concrete compacting apparatus, and compacting method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel lining concrete compacting apparatus which can hold the position of a vibrator at a general center in a thickness direction in a lining concrete placement space so as not to collide with a form, reinforcements, a tunnel inner wall, etc., and allows the operator to carry out pull-up operation so as not to form an insufficient compaction portion without relying on his intuition, and to provide a compacting method using the compacting apparatus. SOLUTION: The lining concrete compacting apparatus is positioned in the concrete placement space at a location corresponding to an inspection window formed in the form, and shaped so as to follow the shape of the tunnel inner wall surface. The apparatus is formed in one piece of two pull-up guiding strip members 5, 5 and guide holding members 12A, 12A engaging with the respective pull-up guiding strip members 5, 5. Further, the apparatus is comprised of a vibrator device 6A which is pulled up along the pull-up guiding strip members 5, 5, and concrete detecting sensors 17, 17 which are attached to the respective guide holding members 12A, 12A, and move together with the vibrator device 6A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compacting device for lining concrete constructed on the inner surface of a tunnel and a compacting method using the same, and more specifically to a lining concrete cast along the inner surface of a tunnel. The present invention relates to a compacting device and method for eliminating high-quality concrete by eliminating defective portions such as cavities when compacting with a vibrator and saving labor in compacting work.

[0002]

2. Description of the Related Art Leakage, etc. is prevented on the inner wall surface of various tunnels formed underground by the urban tunnel construction method represented by the shield construction method, the blasting construction method and the mountain tunnel construction method represented by the free section excavator. A lining concrete with a predetermined thickness is poured along the inner wall surface of the tunnel to finish the inner surface to a predetermined shape.

The construction of this lining concrete is carried out by assembling the formwork at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and filling the narrow space between the inner wall surface of the tunnel and the formwork with the lining concrete. However, in order to improve the quality of the lining concrete, the concrete should be packed densely so that there are no cavities between the formwork and the inner wall of the tunnel, and the concrete should be vibrated when filled. It is necessary to perform sufficient compaction.

Conventionally, for compacting lining concrete, as shown in FIG. 11, a bar-shaped vibrator 50 is inserted from an inspection window 51 into the lining concrete placing space, and is placed on the upper side of the placed concrete. A method of compacting concrete while manually pulling up the vibrator 50 so as to give vibration, or a vibrating device having a self-exciting motor is attached to the outer surface of the form, and the vibration is transmitted to the concrete through the form. The method of compaction is adopted.

[0005]

However, when the vibrator 50 is inserted through the former inspection window 51 for compaction, the upper position (level position) of the placed concrete cannot be visually recognized, It is necessary to pull up the vibrator 50 while relying on intuition, and concrete may not be sufficiently compacted, and the shape of the tunnel wall surface is formed in an arc shape, and the cable portion of the vibrator 50 inserted from the inspection window 51. When the rigidity of 52 is high, it is biased to the position where it contacts the tunnel wall surface, and when the rigidity is low, it is biased to the position where it contacts the formwork.
Alternatively, it is practically difficult to maintain the position in the approximate center of the lining concrete placing space such as hitting the reinforcing bar, and the vibration is transmitted to the natural ground or the formwork / reinforcing bar to dissipate the vibration energy. However, there was a problem that it was not possible to efficiently give vibration to the poured concrete.

On the other hand, in the latter method of mounting the vibration generating device on the outer surface of the mold, the vibration generated by the vibration generating device cannot be efficiently transmitted to the concrete because the mold which is difficult to transmit the vibration is interposed therebetween. In particular, there is a problem that this tendency becomes remarkable when the thickness of the formwork is large or when the thickness of the lining concrete is large.

[0007] In compacting work of top-end concrete whose lower end is an inspection window installed in a formwork of a tunnel lining, it is necessary to use a bar-shaped vibrator when a worker puts it in a place to be placed. Since it is not possible to meet the above conditions, it is often the case that a vibration oscillating device is attached to the outer surface of the mold, but the top end concrete cannot be sufficiently compacted for the reasons described above.

Further, since the concrete is press-fitted into the uppermost end portion of the top spouted concrete splicing portion from a concrete pouring port located 0.5 to 1.0 m away from the splicing seam position, a large air pool is likely to occur. In addition to the fact that it is difficult to give the vibration of the vibrator, a void is likely to be generated.

Further, in order to grasp the filling state of the top end concrete, it is often the case that a part of the gable form is removed and visually confirmed, but it is also possible to use a detection sensor utilizing the electric resistance of the concrete. . However, in this case, the inner wall surface of the concrete is arcuate, and it is necessary to install sensors at many positions to detect that it has been filled, and it is usually too costly. It is common practice to carry out a test construction in and to reflect the result in the subsequent lining concrete pouring.

On the other hand, with respect to compaction of tunnel lining concrete, conventionally, JP-A-7-189488 and JP-A-8-189488
JP260896, JP11-210393A, JP7-48994
Although various proposals have been made in the publications, etc., if the vibrator method is used, all of them are related to the compaction of the side wall of the tunnel, and the compaction method limited to the top of the tunnel is effective. I can't find anything to suggest a method.

Therefore, the first object of the present invention is to cover the concrete of the side wall of the tunnel lining by using a vibrator so that the vibrator is prevented from hitting the formwork / rebar, the inner wall of the tunnel and the like. While maintaining the position in the approximately center of the thickness direction in the concrete pouring space, pulling operation can be performed without relying on the intuition of the worker and without causing insufficient compaction, and high quality concrete can be obtained. The purpose is to enable placement and to save labor in compaction work.

A second problem is that when compacting the top end concrete of the tunnel lining by using a vibrator, the lining concrete should be held at a position approximately in the center in the thickness direction in the concrete placing space, and High quality concrete can be placed without relying on the operator's intuition and without defective parts such as cavities and without compaction inadequate parts, and it is possible to place compaction work and save labor in compaction work. Is to try.

[0013]

According to a first aspect of the present invention for solving the first problem, a formwork is assembled at a position separated from an inner wall surface of a tunnel by a thickness of lining concrete to form an inner wall surface of the tunnel. A compacting device for sidewall lining concrete constructed by filling a lining concrete into a concrete placing space between the formwork and the inside of the concrete placing space and forming on the formwork. Along the inner wall surface of the tunnel at the specified inspection window corresponding position,
One or two pulling guide strips arranged along the up-down direction and a guide holding member that engages with the pulling strips are integrally provided, and the pulling strips are pulled along the pulling strips. It is characterized by comprising a vibrator to be operated and one or a plurality of concrete detection sensors which are directly or indirectly attached to the guide holding member and move together with the vibrator.

In this case, a cable reel that winds a cable that is continuous from the rear end surface of the vibrator and that is output from the inspection window, and a control that drives and controls the cable reel based on a detection signal from the concrete detection sensor. It is desirable to have a container.

According to a third aspect of the present invention for solving the above-mentioned second problem, the formwork is assembled at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and the space between the inner wall surface of the tunnel and the formwork is assembled. What is claimed is: 1. A top end lining concrete compacting device constructed by filling a lining concrete into a concrete placing space, wherein the drawing guide is arranged in the concrete placing space along the longitudinal direction of the tunnel. A linear member and a guide holding member that engages with the pull-in guide linear member are integrally provided, and are held by the pull-in guide linear member in a suspended state and are pulled along the pull-in guide linear member. A vibrator and an upper end position of the guide holding member, or a tunnel top end side position via a separate member, and one or a plurality of members that move together with the vibrator. It is characterized in further comprising a Nkurito sensor.

In this case, the cable reel that winds up the cable that is continuous from the rear end surface of the vibrator and that has passed through the end form and is taken out, and the cable reel based on the detection signal from the concrete detection sensor It is desirable to provide a controller for driving and controlling. Further, a pipe-shaped member that is continuous with the rear end surface of the vibrator, extends through the end frame to the outside, and accommodates a continuous cable from the rear end surface of the vibrator, and pushes and pulls the pipe-shaped member. The vibrator can be moved in the longitudinal direction of the tunnel by operating the vibrator.

In the above invention, it is desirable that a plurality of the concrete detection sensors are arranged at intervals in the vibrator movement direction, and a vibration insulating material for reducing vibration transmission from the vibrator to the concrete detection sensor is arranged. It is desirable to have it. Further, it is desirable to provide a controller for controlling driving / stopping of the vibrator based on a detection signal from the concrete detection sensor.

On the other hand, in the compaction method corresponding to the first problem, the formwork is assembled at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and the concrete placing space between the inner wall surface of the tunnel and the formwork. A method for compacting sidewall lining concrete, which is constructed by filling lining concrete in a tunnel inner wall surface at a position corresponding to an inspection window in the concrete placing space and on the formwork. Along with the shape, one or two pulling guide strips are provided along the vertical direction, and a guide holding member that engages with the pulling guide strips is integrally provided. A vibrator that is pulled up along the guide, and one or more concrete units that move with the vibrator directly or indirectly on the guide holding member. When the concrete placing space is filled with concrete, the vibrator is pulled up by a predetermined amount along the pull-up guide strip member based on the detection signal from the concrete detection sensor. It is characterized by hardening.

The compaction method corresponding to the second problem is that the form is assembled at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and the concrete placing space between the inner wall surface of the tunnel and the form. A compaction method of top end lining concrete constructed by filling lining concrete in, wherein a pull-in guide strip member is provided along the tunnel longitudinal direction in the concrete placing space, A guide holding member that engages with the pull-in guide strip member is integrally provided, and a vibrator that is held by the pull-in guide strip member in a suspended state and that is retracted along the pull-in guide strip member is provided. And one or more concrete units that move together with the vibrator to an upper end position of the guide holding member or to a tunnel top end position via another member. When the concrete is filled into the concrete placing space with a detection sensor attached, the concrete is compacted while pulling in the vibrator along the guide strip member by a predetermined amount based on the detection signal from the concrete detection sensor. It is characterized by performing.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram of a form installation state for placing concrete in a tunnel lining.

As shown in FIG. 1, in order to place the lining concrete on the inner wall surface of the tunnel, a formwork is formed along the circumferential direction of the tunnel at a position separated from the inner wall surface 1 of the tunnel by the thickness of the lining concrete. 2 is installed, and lining concrete is placed in the concrete placing space 4 between the inner wall surface 1 of the tunnel and the formwork 2. The lining concrete is poured from one side of the tunnel in order at predetermined intervals, and a gable form (not shown) is provided at the end.

The tunnel in the illustrated example is sprayed with concrete 3 (primary lining) for supporting the ground wall surface after excavation.
Is sprayed with a specified thickness, and this sprayed concrete 3
Concrete is placed as a secondary lining on the inner surface of the.
The inner wall surface of the tunnel here means the inner wall surface of the tunnel immediately before placing the lining concrete, and when it is a sprayed concrete surface like this example, or when the ground is good and the primary lining is not performed. May be a ground surface or, in the case of the shield construction method, a segment.

To place lining concrete, the tunnel cross section is divided into a top end portion A and side wall portions B and B on both sides in the circumferential direction, and first, the lining concrete is placed on the side wall portions B and B. After that, the lining concrete of the top end A is placed. Therefore, the compaction device and method of the present invention will be described below in detail by dividing the construction of the side wall portions B and B and the construction of the top end portion A.

[Placement of lining concrete on the side walls B, B]
2 to 5, a detailed explanation will be given of the lining concrete pouring of the side wall portions B and B, as shown in FIGS. 2 and 3, the boundary between the side wall portion B and the top end portion A of the formwork 2. Part at an appropriate interval in the longitudinal direction of the tunnel, specifically 1.5 to 3 m
The inspection windows 2a, 2a ... Are provided at regular intervals, and vibration is applied to the concrete that is placed by placing a vibrator through the inspection windows 2a.

First, in the present compaction method, before the installation of the formwork 2, two strips are horizontally separated by a predetermined width in the concrete placing space 4 and at the corresponding position of the inspection window 2a. The pulling guide strip members 5 and 5 are arranged along the tunnel inner wall surface shape and along the vertical direction. In this case, as the pulling guide ridge member 5, for example, a high-rigidity member that does not easily deform such as a steel rod or a reinforcing bar can be used. In addition, the pulling guide strip members 5, 5
Is disposed at a substantially central position in the lining concrete thickness direction.

The vibrator device 6A held by the pulling guide strips 5 and 5 and operated to be pulled up along the pulling guide strips 5 and 5 will be described in detail with reference to FIGS.
As shown in FIG.
And a casing tube portion 11 in which a vibration motor and the like for rotating the rotary oscillator are provided in series, and the casing tube portion 11 has a space in the longitudinal direction. In addition, guide holding members 12A and 12A through which the pulling guide strips 5 and 5 are inserted are integrally provided at two locations.

As shown in FIG. 5, the guide holding member 12A is inserted through the pulling guide strip member 5 on the outer surface of a half-divided band member 14 having mounting flanges 14a, 14a at both ends. By preparing a pair of left and right members each having a guide arm piece 15 having a hole 15a, fitting the fitting flanges 14a, 14a that are face-to-face fitted with each other with bolts and nuts 16 It is integrally attached to the casing tube portion 11. A concrete detecting sensor 17 for detecting the presence of concrete is attached to one end of the guide holding member 12A. This concrete detection sensor 17 includes two rod-shaped electrodes 17a, 17 protruding to the outer surface.
AC voltage is applied between the electrodes 17a and 17b to measure the resistance value between the electrodes 17a and 17b.
If it exists between the electrodes 17b, the resistance value between the electrodes 17a and 17b is lowered, and it is detected that the concrete is filled. In addition, the concrete detection sensor 1
7 may be indirectly provided to another member attached to the guide holding member 12A.

The concrete detecting sensor 17 includes the band member 14 and the casing tube portion 11 so that the vibration of the vibrating portion 10 is transmitted to the concrete detecting sensor 17 via the guide arm piece 15 and is not destroyed. A rubber sheet 13 as a vibration insulating material is interposed therebetween. In addition, as the vibration insulating material, the guide arm piece 1 is also used.
Vibration may be insulated by providing a structure in which a rubber material is interposed in the middle portion of 5.

On the other hand, at the rear end portion of the casing cylinder portion 11, a power supply cable 18 for supplying power to a motor provided inside the casing cylinder portion 11 and a lead wire 19 from the concrete detection sensor 17 are extended. Then, it is taken out from the inspection window 2a and wound around the cable reel 21. The power supply cable 18 and the lead wire 19 are housed in the hose 20 so that they do not come apart, and the reinforcing fiber such as Kepler is preferably covered with a material having an increased tensile strength so as not to be broken. The one used as the material is desirable.

The power supply cable 18 and the lead wire 19
(Hereinafter, collectively referred to as a cable) is electrically connected to a controller 22 via a cable reel 21, and a winding motor 24 of the cable reel 21 is driven based on a detection signal from the concrete detection sensor 17. In addition to being controlled, the drive / stop of the vibration motor is controlled.

The concrete method of compacting the side wall lining concrete will be described below in accordance with specific procedures. The guide holding member 12A is inserted so that the vibrator device 6A can be pulled up along the pulling guide strips 5, 5. After the pulling guide strips 5 and 5 are installed in the holes 15a, the cable reel 21 is unwound and the vibrator device 6A is lowered to the lowermost position. In addition, basically, a plurality of vibrator devices 6A are installed in the concrete placing section in the horizontal direction at appropriate intervals.

In this state, concrete is poured into the concrete placing space 4 from the concrete pressure feeding hose inserted from a certain inspection window 2a or a concrete placing port provided separately. Gradually raise the level surface of the concrete, if the lower side concrete detection sensor 17 _D detects the concrete, during the predetermined time, the concrete compacting by vibration performs power the motor excitation of the vibrator device 6A. It should be noted that if excessive vibration is applied by the vibrator, on the contrary, it will result in promoting material separation, so that an appropriate vibration time is set.

[0033] Thereafter, continued concreting, if the upper side concrete detection sensor 17 _U detects the concrete, and driven in a direction winding the cable reel 21 pulling upwardly vibrator device 6A by a predetermined amount. This pulling amount is appropriately set in such a length that the vibrating section 10 is not exposed to the air. For example, a lower concrete detection sensor 17 _D located above the vibrating section 10 outputs a control signal that is a detection signal exposed to the air. Alternatively, the winding of the cable reel 21 may be stopped.

When the vibrator device 6A is pulled up by a predetermined amount, the vibrator device 6A is again held for a predetermined time.
Power is supplied to the vibration excitation motor of and the concrete is compacted by vibration. After that, as the concrete is poured, based on the detection signals from the concrete detection sensors 17 _U and 17 _D , the lifting of the vibrator device 6A and the vibration for a predetermined time are repeated, and the concrete is evenly placed. Try to apply vibration.

By the way, in the above example, two pulling guide strip members 5 are provided to prevent rotation of the vibrator device 6A around the pulling guide strip member 5, but in some cases, the pulling guide strip members 5 may be used. The strip member 5 may be a single strip. In this case, the length of the guide arm piece 15 of the guide holding material 12A is made as small as possible, and even if the vibrator device 6A swings, the position of the vibrator device 6A is extremely close to the concrete wall surface side and the mold frame side position. It is desirable to avoid bias.

[Casting of lining concrete on top portion A] Next, the lining concrete placing of the top portion A will be described in detail with reference to FIGS. 6 to 9.

At the top end portion A, as shown in FIG. 1, before the installation of the form 2, the pull-in guide strip members 25, at appropriate intervals in the tunnel circumferential direction and along the tunnel longitudinal direction. 25 ... are arranged. In this case, as the pull-in guide strip member 25, for example, a high-rigidity member such as a steel rod / rebar that does not easily deform or a cord-shaped member such as a PC steel wire can be used. However, when a cord-shaped member having a large flexibility is used, it is necessary to keep it in a tense state so that there is no slack. Further, it is desirable that the pulling guide strip member 25 is disposed such that the vibrator device 6B suspended by the pulling guide strip member 25 is located substantially at the center in the thickness direction of the lining concrete.

The vibrator device 6B suspended from the pull-in guide strip member 25 and retracted along the pull-in guide strip member 25 has a rotary oscillator as shown in detail in FIGS. 8 and 9. A vibrating section 10 provided internally,
It has a structure in which a casing cylinder portion 11 in which a vibration-exciting motor for rotating the rotary oscillator is internally provided is connected in series, and the casing cylinder portion 11 has a space 2 in the longitudinal direction. Guide holding members 12B and 12B, through which the pull-in guide strips 25 and 25 are inserted, are integrally provided at the locations.

As shown in FIG. 9, the guide holding member 12B has an insertion surface for the pulling guide strip member 25 on the outer surface of the band member 14 in a half-divided shape having mounting flanges 14a, 14a at both ends. One side member provided with a guide arm piece 15 having a hole 15a and a half-divided band member 14 provided with mounting flanges 14a, 14a at both ends are used as the other side member and are fitted onto the casing tubular portion 11 to face each other. The mounting flanges 14a, 14a to be aligned are fastened together by bolts and nuts 16 to be integrally attached to the casing tubular portion 11.

Directly on the upper end of the guide holding material 12B,
Alternatively, a concrete detection sensor 17, 17 for detecting the presence of concrete (not shown) at an upper position via another member attached to the guide holding member 12B.
Is provided. This concrete detection sensor 17
Is to measure the resistance value between the electrodes 17a and 17b by applying an AC voltage between the two rod-shaped electrodes 17a and 17b protruding to the outer surface. Concrete is the electrodes 17a and 17b.
If it exists between them, the resistance value between the electrodes 17a and 17b is lowered, and it is detected that the concrete is filled.

The concrete detecting sensor 17 includes the band member 14 and the casing tube portion 11 so that the vibration of the vibrating portion 10 is not transmitted to the concrete detecting sensor 17 via the guide arm piece 15 and is not destroyed. A rubber sheet 13 as a vibration insulating material is interposed therebetween. In addition, as the vibration insulating material, the guide arm piece 1 is also used.
Vibration may be insulated by providing a structure in which a rubber material is interposed in the middle portion of 5.

On the other hand, at the rear end portion of the casing cylinder portion 11, a power supply cable 18 for supplying power to a motor provided inside the casing cylinder portion 11 and a lead wire 19 from the concrete detection sensor 17 are extended. Then, it is taken out from the insertion hole formed in the end form 2B and wound around the cable reel 21. The power supply cable 18
The lead wire 19 and the lead wire 19 are housed in the hose 20 so as not to be loosened, and are preferably made of a reinforcing fiber such as Kepler or the like which uses a material having an increased tensile strength as a covering material so as not to be broken. desirable.

The power supply cable 18 and the lead wire 19
Is electrically connected to the controller 22 via the cable reel 21, and the winding motor 24 of the cable reel 21 is drive-controlled on the basis of the detection signal from the concrete detection sensor 17 and the vibration motor. Is controlled to be driven / stopped.

The method for compacting the top end lining concrete will be described below in concrete terms and in accordance with the procedure. In order that the vibrator device 6B can be retracted along the retracting guide strip member 25, the insertion hole of the guide holding member 12B is inserted. 1
After the lead-in guide strip member 25 is installed in the 5a, the cable reel 21 is unwound and the vibrator device 6B is positioned in the vicinity of the cast concrete 7. The pull-in guide strip 25 is
It is possible to connect the projecting end of the pull-in guide strip member 25 buried in the existing concrete 7 by the connecting tool 26, or by welding or the like.

In this state, concrete is poured into the concrete pouring space 4 from the concrete pouring port 8 formed on the top end surface of the formwork 2 and at a position adjacent to the cast concrete 7. Concrete is filled gradually concrete設空between 4, if relatively concrete設口8 concrete detection sensor 17 located on the side of _R detects the concrete, during the predetermined time, addition of a vibrator device 6B vibration The concrete motor is powered and vibration is used to compact the concrete. It should be noted that if excessive vibration is applied by the vibrator, on the contrary, it will result in promoting material separation, so that an appropriate vibration time is set.

[0046] Thereafter, it continued concreting, if concrete detection sensor 17 _L wife formwork 2B side has detected the concrete, and driven in a direction winding the cable reel 21 draws the vibrator device 6B by a predetermined amount. The amount of pull-in is appropriately set in such a length that the vibrating section 10 is not exposed to the air. For example, the concrete detection sensor 17 _R located on the concrete pouring port 8 side uses a detection signal exposed to the air as a control signal. The winding of the cable reel 21 may be stopped.

When the vibrator device 6B is pulled in by a predetermined amount, the vibrator device 6B is again held for a predetermined time.
Power is supplied to the vibration excitation motor of and the concrete is compacted by vibration. After that, with the pouring of concrete, based on the detection signals from the concrete detection sensors 17 _R and 17 _L , the retracting of the vibrator device 6B and the vibration for a predetermined time are repeated, and the pouring concrete is evenly distributed. Try to apply vibration.

When pouring concrete on the top end A,
A large air pocket is likely to occur at the uppermost position, and a gap is likely to be produced in combination with the difficulty of giving vibration of the vibrator. However, in the present compaction device, the concrete detection sensors 17 and 17 are provided, for example, on the upper side via the upper end of the guide holding member 12B that suspends the vibrator device 6B or another member attached to the guide holding member 12B. Since it is attached at a position, compaction is performed while confirming that the poured concrete is surely filled up to the uppermost portion of the top end portion A.

By the way, since the top end surface of the tunnel has an arch shape, the concrete press-fitted into the concrete placing space 4 flows down, so that the vibrator device installed at appropriate intervals in the circumferential direction of the tunnel. 6B, 6
The positions of B ... in the longitudinal direction of the tunnel during the concrete pouring are not uniform, and as shown in FIG. 7, the pulling-in is performed faster for the vibrator devices 6B arranged on both sides. In this case, the vibrator device 6 located on the ceiling part
When B is vibrated, the vibration promotes fluidity,
When the concrete flows down, the vibrator device 6B may be naturally exposed to the air. It suffices to be able to send out the cable 18 and push out the vibrator device 6B, but it is substantially difficult to push out because the cable 18 is flexible.

Therefore, as shown in FIG. 10, a cable 18 which is continuous with the rear end face of the vibrator device 6B, extends through the end frame 2B to the outside, and is continuous with the rear end face of the vibrator device 6B. , 19 to accommodate the pipe-shaped member 27, and the pipe-shaped member 27 can be pushed or pulled manually or by the drive rollers 28, 28, the vibrator device 6B is exposed when the vibrator device 6B is exposed to the air. It can be sent out and buried again in concrete.

[0051]

As described above in detail, according to the present invention, in compacting the side wall concrete of the tunnel lining by using the vibrator, the vibrator is prevented from hitting the formwork / rebar, tunnel inner wall, etc. Since it is possible to maintain the position in the center of the lining concrete pouring direction in the thickness direction, it is possible to perform pull-up operations without relying on the intuition of workers and without causing insufficient compaction, so high quality is achieved. The concrete can be placed and the compaction work can be saved.

When compacting the top end concrete of the tunnel lining using a vibrator,
The lining concrete can be held at a position approximately in the center in the thickness direction in the pouring space, and it can be pulled out without relying on the operator's intuition and eliminating defective parts such as cavities and not causing insufficient compaction. As a result, high-quality concrete can be placed and labor for compaction can be saved.

[Brief description of drawings]

FIG. 1 is a diagram showing a form installation state for placing concrete in a tunnel lining.

FIG. 2 is a cross-sectional view showing a compacted state of the side wall lining concrete.

FIG. 3 is a front view thereof.

FIG. 4 shows a vibrator device 6A, (A) is a front view,
(B) is a side view.

5 is a view taken along the line VV of FIG.

FIG. 6 is a vertical cross-sectional view showing a compacted state of top end lining concrete.

FIG. 7 is a plan view thereof.

FIG. 8 shows a vibrator device 6B, (A) is a side view,
(B) is a plan view.

9 is a view taken along the line IX-IX in FIG.

FIG. 10 is a vertical cross-sectional view in which a vibrator device 6B is movable in a tunnel longitudinal direction.

FIG. 11 is a cross-sectional view showing a conventional compaction method using a vibrator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wall surface in tunnel, 2 ... Formwork, 3 ... Shotcrete, 4 ... Concrete placing space, 5 ... Pulling guide strip member, 6A and 6B ... Vibrator device, 7 ... Precast concrete, 8 ... Concrete placing Installation port, 10 ... Vibration part,
11 ... Casing cylinder part, 12A / 12B ... Guide holding material, 13 ... Rubber sheet (vibration insulating material), 17 ... Concrete detection sensor, 18 ... Power supply cable, 19 ... Lead wire, 20 ... Hose, 21 ... Cable reel, 22 ... Controller, 24 ... Winding motor, 25 ... Pull-in guide strip member, 26 ... Coupling tool, 27 ... Pipe-shaped member, 28 ... Drive roller

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hikozo Imaoka             4-12-20 Nihonbashihonmachi, Chuo-ku, Tokyo             Sato Industry Co., Ltd. (72) Inventor Yasuhiro Tanaka             4-12-20 Nihonbashihonmachi, Chuo-ku, Tokyo             Sato Industry Co., Ltd. F term (reference) 2D055 BB02 CA03 CA06 CA07 DA01                       KC06 LA13 LA14                 2E172 AA05 DB13 FA08 FA13 FA27

Claims (10)

[Claims] 1. Construction is carried out by assembling a formwork at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and filling the lining concrete in the concrete placing space between the inner wall surface of the tunnel and the formwork. A side wall lining concrete compacting device, which is arranged in the concrete placing space and at a position corresponding to an inspection window formed in a formwork along the tunnel inner wall surface shape and in the vertical direction. The pulling guide strip member and the guide holding member that engages with the pulling guide strip member, and a vibrator that is pulled up along the pulling guide strip member; One or a plurality of concrete detection sensors which are directly or indirectly attached to the guide holding member and move together with the vibrator. Le lining concrete compactor. 2. A cable reel that winds a cable that is continuous from the rear end surface of the vibrator and that is output from the inspection window, and a controller that drives and controls the cable reel based on a detection signal from the concrete detection sensor. The compacting device for tunnel lining concrete according to claim 1, further comprising: 3. The construction is performed by assembling a formwork at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and filling the lining concrete in the concrete placing space between the inner wall surface of the tunnel and the formwork. A device for compacting top end lining concrete according to claim 1, wherein a pull-in guide strip member is provided in the concrete placing space along the longitudinal direction of the tunnel, and a guide engaged with the pull-in guide strip member. A vibrator that is integrally provided with a holding member, is held by the pull-in guide strip member in a suspended state, and is retracted along the pull-in guide strip member, and the upper end position of the guide holding member, or a separate member. And one or a plurality of concrete detection sensors that move with the vibrator and are located at the top end side of the tunnel via the ton. Nell lining concrete compaction device. 4. A cable reel that winds a cable that is continuous from the rear end surface of the vibrator and that has passed through the end form and is taken out, and drive control of the cable reel based on a detection signal from the concrete detection sensor. The device for compacting tunnel lining concrete according to claim 3, further comprising: 5. A pipe-shaped member which is continuous with the rear end surface of the vibrator, extends through the end frame to the outside, and accommodates a cable continuous from the rear end surface of the vibrator, the pipe-shaped member The compaction device for tunnel lining concrete according to claim 3, wherein the vibrator can be moved in the longitudinal direction of the tunnel by pushing and pulling. 6. A plurality of the concrete detection sensors are arranged apart from each other in a vibrator moving direction.
The concrete compacting device for tunnel lining concrete according to any one of the above. 7. The compacting device for tunnel lining concrete according to claim 1, further comprising a vibration insulating material for reducing vibration transmission from the vibrator to the concrete detection sensor. 8. The compacting device for tunnel lining concrete according to claim 1, further comprising a controller that controls driving / stopping of a vibrator based on a detection signal from the concrete detection sensor. 9. The construction is performed by assembling a formwork at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and filling the lining concrete in the concrete placing space between the inner wall surface of the tunnel and the formwork. A method for compacting side wall lining concrete according to claim 1, wherein the method is along the tunnel inner wall surface shape in the concrete placing space and at a position corresponding to an inspection window formed in the formwork, and 1 or along the vertical direction. Two pull-up guide strip members are provided in advance, and a guide holding member that engages with the pull-up guide strip members is integrally provided, and a vibrator for pulling up is arranged along the pull-up guide strip members. At the same time, one or a plurality of concrete detection sensors that move directly or indirectly together with the vibrator are attached to the guide holding material. When filling the concrete pouring space with the concrete, the concrete is compacted while pulling up the vibrator by a predetermined amount along the pulling guide strip member based on a detection signal by the concrete detection sensor. Tunnel lining concrete compaction method. 10. The construction is performed by assembling a formwork at a position separated from the inner wall surface of the tunnel by the thickness of the lining concrete, and filling the concrete placing space between the inner wall surface of the tunnel and the formwork with the lining concrete. A method for compacting top cover lining concrete according to claim 1, wherein a pull-in guide strip member is provided along the longitudinal direction of the tunnel in the concrete placing space, and a guide holding is engaged with the pull-in guide strip member. A member is integrally provided, and while being held in a suspended state by the pulling guide strip member, a vibrator that is pulled in along the pulling guide strip member is provided, and the upper end position of the guide holding member, Alternatively, one or a plurality of concrete detection sensors that move together with the vibrator are attached to the tunnel top end side via another member, and When filling the concrete placing space with the concrete, based on a detection signal by the concrete detection sensor, the concrete is compacted while retracting the vibrator by a predetermined amount along the retracting guide strip member. Tunnel lining concrete compaction method.