JP6889443B2 - Curing equipment and curing method for lining concrete - Google Patents

Description

The present invention particularly relates to a curing device and a curing method for a tunnel lining concrete.

After placing lining concrete on the inner peripheral surface of the tunnel with a centre, curing is performed to suppress rapid drying and temperature changes of the concrete in order to prevent cracks in the concrete. Conventionally, as shown in Patent Document 1, for example, a curing trolley having a length substantially the same as that of a center with a curing sheet stretched on the outer periphery of the frame is advanced following the center, and the inner peripheral surface of the cast concrete is placed. It has been proposed to form a closed space so as to cover the concrete and cure it. Then, in the curing device described in Patent Document 1, an overhanging curing portion (second space 27) is provided so as to cover the work scaffold 41 protruding from the rear end of the center 40, and the overhanging curing portion is used as a curing space for the curing carriage. By abutting against (first space 26), the inner peripheral surface of the cast concrete is continuously covered.

JP 2010-156133

However, in the case of using the above-mentioned conventional curing trolley, the centre ahead of the curing trolley moves forward by placing the lining concrete, and prior to placing the lining concrete in the next section. The center is cleaned, but the center is temporarily moved forward beyond the front end of the cast lining concrete in order to secure a working space for the cleaning. Therefore, there is a problem that a continuous curing space cannot be formed during this period, and a blank time occurs in which the cast lining concrete cannot be cured.

Therefore, the present invention solves such a problem, and it is possible to secure a good quality tunnel lining concrete inner peripheral surface by eliminating a blank time that cannot be cured from the time when the lining concrete is placed to the start of curing. It is an object of the present invention to provide a curing device and a curing method for a concrete lining concrete.

In order to solve the above problems, the lining concrete curing device (1) of the first invention has a frame having a shape along the inner circumference of the tunnel and is sandwiched between the lining concrete and the inner circumference of the tunnel (T). A curing device that is placed after the centre (Cn) on which (Cr) is placed and that cures the lining concrete (Cr), is located at a predetermined interval with respect to the center (Cn), and is a tunnel. (T) Between the curing trolley (2) having the frame body (22) along the inner circumference and the centle (Cn) and the curing trolley (2), the centre (Cn) and the curing trolley (2) It is supported by a plurality of wire bodies (3) stretched at intervals in the circumferential direction of the frame body and the wire body (3), and is laid inward along the inner peripheral surface of the lining concrete (Cr). A sheet body (4) that covers the inner peripheral surface of the lining concrete (Cr) to form a closed curing space (S) is provided.

In the first invention, while the center is being cleaned, the edge of the sheet on the center side is rolled up in the outer peripheral direction, and the edge is temporarily fixed to the end face of the cast concrete. , The closedness of the curing space covering the inner peripheral surface of the cast concrete is not impaired. As a result, good outside air blocking curing can be performed by retaining the heat and water vapor generated from the lining concrete in the curing space.
In addition, since there is only a wire body and a seat body between the center and the curing trolley, it interferes with the work scaffolds and stairs of the center, the keren device for cleaning the surface of the center, the concrete casting pipe, etc. like the conventional curing trolley. The curing trolley can be constructed without any difficulty in avoiding.
Further, since only the wire body and the seat body exist between the center and the curing carriage, the cleaning work can be efficiently performed and the cleaning work time can be shortened without hindering the cleaning work.
In addition, since there is no need for an overhanging curing section between the center and the curing carriage, equipment costs can be suppressed.
Further, it is possible to appropriately form an opening by sliding the sheet body on the wire body at the time of confirming the unframed state of the center and the cleaning work of the center.

In the second invention, one end of the wire body (3) is fixed to the center (Cn) or the curing carriage (2), and a weight (32) is attached to the other end of the wire body (3). The other end is suspended on a suspension member (31) provided on the curing carriage (2) or the centre (Cn). According to this, since a constant tension is always applied to the wire body between the centle and the curing carriage, the seat body is always supported, and the lining concrete can be cured even during the cleaning work. Further, even if the distance between the curing carriage and the center fluctuates or the distance is adjusted and changed, the wire body is fed or returned accordingly, and the tension of the wire body is kept constant by the weight.

In the third invention, the length of the sheet body (4) in the tunnel (T) direction is made longer than the length (section length) of the centre (Cr), and the longer portion is used as the closed curing space (the closed curing space). S) Loosen inside. As a result, even if the distance between the curing carriage and the center fluctuates, there is no problem with the seat body.

In the fourth invention, the curing carriage (2) can move in the longitudinal direction of the tunnel (T). As a result, the curing carriage can be easily moved in the tunnel (T).

In the method for curing the lining concrete of the fifth invention, the lining concrete (Cr) is cast in the longitudinal direction of the tunnel (T) at intervals of a certain length, and then the cast lining concrete (Cr) is cast. This is a method for curing lining concrete, which is cured by the curing device of the first invention, in which lining concrete (Cr) is placed in the next section following the section in which the lining concrete (Cr) has been placed. In order to move the center (Cn) forward in the longitudinal direction of the tunnel, the center (Cn) is moved until the rear end of the center (Cn) exceeds the front end of the cast lining concrete by a predetermined length. ), The step of locating the curing trolley (2) at the rear end of the lining concrete (Cr) placed at the rear end of the section, and the step of locating the curing trolley (2) at the rear end of the center (Cn). The front end of the sheet body (4) is rolled up rearward and temporarily fixed to the front end surface of the placed lining concrete (Cr), and is attached to the inner peripheral surface of the placed lining concrete (Cr). The steps include forming a closed space (S) with the sheet body (4) and using the space formed by rolling up the sheet body (4) as a working space.

In the fifth invention, the step of moving the rear end of the centre over the front end of the cast lining concrete over a predetermined length, and the rear end of the lining concrete whose rear end is the section of the curing device. The process of locating the part and the front end of the sheet body located at the rear end of the center are rolled up backward and temporarily fixed to the front end surface of the cast lining concrete, and the inside of the cast lining concrete. Since a closed space is formed between the peripheral surface and the sheet body, the concrete curing is not interrupted even during the cleaning work and cleaning of the center.

In the sixth invention, the length of the curing device (1) is longer than a predetermined length or more than the section length having a constant length. As a result, even if the centre is moved more than a certain length, the rear end of the subsequent curing device does not move forward from the rear end of the lining concrete to be cured, and the front end of the sheet body is placed in the lining. A closed curing space can be obtained simply by temporarily fixing it to the front end face of concrete, and it can be reliably cured.

In the seventh invention, the length of the curing device (1) is substantially equal to the (constant length) section length (centre length), and the center (Cn) and the curing device (1) are integrally moved. Then, the rear end (front end of the curing device) of the centle (Cn) is moved beyond the front end of the cast lining concrete (Cr) by a predetermined length to stop, and then the center and the curing device are moved. Since the jack member (11) to be connected is extended so that the curing carriage (2) is retracted by a predetermined length with respect to the center (Cn), the front end of the seat body is driven substantially at the same time as the retracting movement. A closed curing space (S) can be obtained simply by temporarily fixing it to the front end surface of the lining concrete, and it can be reliably cured.

In the eighth invention, the length of the curing device (1) is substantially equal to the section length (centre length) of a constant length, and the rear end of the centre (Cn) is of the cast lining concrete (Cr). When moving beyond the predetermined length from the front end, when the rear end of the curing device (1) reaches the rear end of the placed lining concrete (Cr), the movement of the curing carriage (2) is stopped and the movement is stopped. Since the jack member (11) connecting the center (Cn) and the curing carriage (2) is extended so that only the center (Cn) is moved by a predetermined length, the seat body located at the rear end of the center By simply rolling up the front end to the rear and temporarily fixing it to the front end surface of the cast lining concrete, a closed space can be obtained between the inner peripheral surface of the cast lining concrete and the sheet body. It can be surely cured.

The reference numerals in parentheses indicate the correspondence with the specific means described in the embodiments described later for reference.

As described above, according to the tunnel-casting concrete curing device of the present invention, it is possible to secure a high-quality lining concrete inner peripheral surface by eliminating the time during which curing cannot be performed from the concrete casting to the start of curing.

It is an overall side view of the curing apparatus of this invention located behind a centle. It is an enlarged side view of a curing device. It is a cross-sectional view of the curing device along the line III-III of FIG. 2, and is also the front view of the curing carriage. It is the cross-sectional view of the curing apparatus along the line III-III of FIG. 2, and is the figure which omitted the front of the curing carriage. It is a side view of the wire body suspension part. It is a front view of the wire body suspension part. It is a side view of the partition plate installation part. It is the whole side view at the time of moving a curing device. It is an enlarged side view of a main part at the time of moving a curing device. It is the whole side view at the time of moving a curing device. It is an enlarged side view of a main part at the time of moving a curing device. It is a cross-sectional view of a curing device, and is also a view showing the front surface showing another example of the curing carriage.

The embodiments described below are merely examples, and various design improvements made by those skilled in the art within the scope of the present invention are also included in the scope of the present invention.

FIG. 1 shows an overall side view of the tunnel lining concrete curing device 1. In FIG. 1, a known center Cn provided with a frame of a predetermined length for placing lining concrete Cr (hereinafter, may be simply referred to as concrete) on the inner circumference of the tunnel T is located in the tunnel. There is. Further, a curing trolley 2 constituting a curing device 1 shorter than the center Cn is located behind the center Cn at a predetermined distance in the longitudinal direction of the tunnel T (on the left side of FIG. 1 on the tunnel entrance side). There is.

In FIG. 1, section A is a concrete placing section by Centru Cn, section B is a curing section of the placed lining concrete Cr, and section C is the next concrete placing section. Each section A to C has the same length as the length of the frame of the center Cn, and the curing carriage 2 is located at the rear end of the section B. The center Cn and the curing carriage 2 can move back and forth (in the tunnel length direction) along the rail R laid in the longitudinal direction on the bottom plate of the tunnel T. Further, the center Cn and the curing carriage 2 are connected to each other so that the distance between the center Cn and the curing carriage 2 can be adjusted by a jack member 11 whose length can be adjusted, and further, the curing carriage 2 follows and moves as the centre Cn moves. It has become.

FIG. 2 shows an enlarged side view of the curing carriage 2. FIG. 3 is a cross-sectional view of the tunnel along the line III-III of FIG. 2, which also depicts the front surface of the curing carriage 2 seen from this direction, and FIG. 4 is a tunnel also drawn along the line III-III. It is a cross-sectional view of the above, in which the front surface of the curing carriage 2 is omitted. As shown in FIG. 4, since only the wire body 3 and the seat body 4 exist between the rear end of the center Cn and the curing carriage 2, there is no congestion with the stairs, work scaffolding, etc. provided at the rear end of the center Cn. Therefore, it is possible to efficiently perform the cleaning work and the like in the center Cn. The curing carriage 2 has a frame body 22 erected on the left and right bases 21 (FIG. 3) that can be moved on the rail R by wheels, and the frame body 22 includes a tunnel-shaped curved arcuate member 221 and an arc-shaped member 221. It is composed of a pillar member 222 that supports the arc-shaped member 221 and a connecting member 223 that connects the pillar member 222 and the arc-shaped member 221. The outer circumference of the arc-shaped member 221 is a circle along the inner peripheral surface of the tunnel T. It has an arc shape and is located inward by a certain distance from the inner peripheral surface of the concrete Cr cast on the inner peripheral surface of the tunnel T to form a space having an arc cross section with the inner peripheral surface of the concrete Cr. .. A wire body 3 is stretched on the arcuate member 221 on the outer peripheral portion of the frame body 22 at a plurality of positions at equal intervals E in the circumferential direction with the structure described below. ..

One end (front end) of each wire body 3 is fixed to the outer peripheral edge 12 (FIG. 2) of the rear end outer peripheral portion of the center Cn having substantially the same diameter as the outer circumference of the arcuate member 221 of the frame body 22 of the curing carriage 2. Each wire body 3 extends rearward from one end thereof parallel to each other and parallel to the inner circumference of the tunnel T, and the other ends are fixed at corresponding positions of the outer peripheral edge of the arcuate member 221 of the curing carriage 2. It is suspended by each sheave 31 (FIG. 5) as a suspension member supported by the bracket 311 and hangs downward. A square plate-shaped weight 32 (FIG. 6) is attached to the lower end (the other end) of each of the hanging wire bodies 3.

Due to such a structure, a constant tension is applied to each wire body 3. In addition, even if the distance between the curing carriage 2 and the center Cn fluctuates during traveling or the distance is adjusted and changed, the sheave 31 rotates and the wire body 3 is unwound or returned to the wire. The tension of the body 3 is always kept constant by the weight 32. In particular, depending on the laying state of the rail R, the curing carriage 2 may sway back and forth and left and right when moving, and the distance between the curing carriage 2 and the center Cn may fluctuate, but even in this case, the tension of the wire body 3 is always kept constant. Dripping.

Then, on the outer side of the wire body 3, a sheet body 4 such as a commercially available flameproof sheet is developed between the inner peripheral surface of the tunnel T and the sheet, as shown in FIGS. 3 and 4. The body 4 is covered with a plurality of wire bodies 3 so as to support them. The length of the seat body 4 is secured to be longer than the length of the section B (therefore, the lengths of the sections A and C), and the long portion is slackened in a wavy shape between the curing carriage 2 and the center Cn. It fits in. The seat body 4 has a width equal to the length of the arc shape in the circumferential direction of the arc-shaped tunnel, and the lower end 42 of the seat body 4 at the left and right lower ends of the curing trolley 2 in the tunnel cross-sectional direction. A pressing member 421 is appropriately placed on the seat body 4 to prevent the end portion of the sheet body 4 from being rolled up. As a result, a closed space having an arc cross section, that is, a curing space S (FIG. 3) is formed inward along the inner peripheral surface of the cast lining concrete Cr over the entire area of the section B which is the curing section. A locking tool (not shown) for locking the seat body 4 to the wire body 3 is attached to the seat body 4 at a necessary position.

Since there is no wire body 3 on the outer circumference of the curing carriage 2, only the seat body 4 is stretched (FIG. 2). Further, a partition plate 5 made of elastically deformable resin such as urethane is erected on the entire circumference of the outer peripheral portion of the curing carriage 2 on the tunnel entrance side toward the inner peripheral surface of the tunnel T for curing. The rear end of the space S in the tunnel direction is closed. The details are shown in FIG.

In FIG. 7, the erected partition plate 5 projects toward the inner peripheral surface of the concrete Cr, and the tip portion thereof abuts on the inner peripheral surface of the concrete Cr and is curved. The lower ends 42, 42 on both sides of the seat body 4 and the front ends of the seat body 4 which are prevented from being rolled up by the partition plate 5 provided on the curing carriage 2, the seat body 4, and the pressing members 421, 421 are fixed to each other. A circular arc cross section covering the inner peripheral surface of the concrete Cr by the rear side end surface 13 (FIG. 2) of the outer peripheral edge edge 12 of the central frame of the center Cn, which is substantially equal to the length of the section B (FIG. 1). A closed curing space S is formed.

A curing method using such a structure, that is, a curing device 1 including a curing carriage 2, a wire body 3, and a seat body 4 will be described below. When the concrete placing in the section A is completed in FIG. 1, the center Cn and the curing device 1 move toward the next concrete placing section C. At this time, prior to the placement of new concrete, the frame of Centre Cn is cleaned. In order to secure a space for the cleaning work, the center Cn is allowed to enter the section C by a predetermined length d (for example, 0.5 to 2.0 m) and stopped (FIG. 8). Conventionally, due to this cleaning work, the subsequent curing trolley could not move to the section A, and there was a blank time of several hours in the curing of the cast concrete.

In the present embodiment, as shown in FIG. 8, since the rear end of the curing carriage 2 also enters the section A by a predetermined amount d, the jack member 11 is extended by a predetermined length d and the curing carriage 2 is retracted to retract the center. The distance between the Cn and the curing trolley 2 is widened, and the amount of the seat body 4 that has been gathered is extended so that the end edge of the frame body 22 of the curing trolley 2 on the tunnel entrance side coincides with the boundary of the section A.

When cleaning the frame of the center Cn, as shown in FIGS. 9 (1) to 9 (2), the end edge 41 on the center Cn side of the sheet body 4 is used as the rear end frame of the center Cn frame. It is peeled off from the fixed state on the body 13, rolled up in the outer peripheral direction, and temporarily fixed to the end face of the cast concrete Cr in section A with a nail 42 or the like using eyelet holes (not shown) attached to the end portion thereof. .. In this way, the closedness of the curing space S covering the inner peripheral surface of the cast concrete Cr is not impaired, and good outside air blocking curing is performed by retaining the heat and water vapor generated from the cast concrete Cr in the curing space S. Can be done. Thus, the conventional problem that the concrete Cr cannot be cured during the cleaning work of the center Cn and a blank time of several hours is generated is avoided. By rolling up the sheet body 4, a sufficient space for cleaning work is formed between the center Cn and the sheet body 4.

After finishing the cleaning work, the center Cn retracts the outer periphery of the frame so as to match the section C (FIG. 10). At this time, the jack member 11 is returned to its original length at the same time as the center Cn is retracted. That is, as shown in FIGS. 11 (1) to 11 (2), prior to retracting the center Cn, the temporary fixing of the end edge 41 of the seat body 4 is removed and returned to the wire body 3, and the frame of the center Cn is returned. It is fixed to the rear end frame body 13. After that, while shrinking the jack member 11, the center Cn is retracted, and the curing space S is closed at the end portion 13 of the frame body. At this time, the tunnel entrance side of the curing space S is closed by the partition plate 5 provided on the curing carriage 2 (FIG. 10). In this way, even during the cleaning work of the center Cn, the outside air blocking curing is performed without causing a blank time after the concrete is placed. According to the curing device 1 of the present embodiment, since only the wire body 3 and the seat body 4 exist between the centre Cn and the curing trolley 2, the scaffolding, stairs, keren device, and casting of the centle are different from the conventional curing trolley. Curing work can be performed without considering interference with pipes and the like.

In the above embodiment, the case where the bracket 311 and the sheave 32 are provided on the center side of the arcuate member 221 of the curing carriage 2 has been described, but the bracket 311 and the sheave 32 may be provided on the tunnel entrance side of the arcuate member 221. Good. According to this, since the wire body 3 can be stretched around the upper part of the frame body 22, the seat body 4 on the upper part of the curing carriage 2 can be supported by the wire body 3. Further, in the above embodiment, the frame bodies 22 of the curing carriage 2 are provided in two rows on the base 21 in the longitudinal direction of the tunnel (FIG. 2), but even if only one row is arranged in the central portion of the base 21. good.

Further, instead of retracting the curing carriage 2 described above, the center Cn is moved and at the same time the jack member 11 is extended by a predetermined amount d to widen the distance between the center Cn and the curing carriage 2, and at the same time, the seat body 4 It is also possible to extend the amount of the pulling up so that the rear end edge of the frame 22 of the curing carriage 2 coincides with the boundary of the section A.
Further, the distance between the rear end of the center Cn and the rear end of the curing carriage 2 may be set to be equal to or larger than the distance obtained by adding the predetermined length d to the concrete placing section length A (B) in advance.
In order to extend the jack member 11, the seat body 4 is set to have a length obtained by adding a length in the tunnel direction to the section A by a predetermined length d or more. When the jack member 11 is not stretched, the seat body 4 is loosened in the curing space S. In this way, even if the jack member 11 is extended to a predetermined length d, the end edge 41 on the center Cn side of the sheet body 4 does not peel off from the rear end edge of the center Cn, and the closed state of the curing space S can be maintained. At this time, the tunnel entrance side of the curing space S is closed by the partition plate 5 provided on the curing carriage 2. Further, both side ends 42 of the seat body 4 are always closed by the pressing member 421.

(Other embodiments)
In the above embodiment, the tension is applied to the wire body by the sheave and the weight, but it may be applied by, for example, a spring member or the like.
Instead of the sheave, for example, a simple rod body can be used as a suspension member for suspending the wire body.
Further, if the distance between the curing carriage and the center or the front and rear centles does not change, a structure may be used in which both ends of the wire body are fixed to the curing carriage or the center.
It is possible to provide a spray nozzle and a blower for wet curing with the curing device of the first embodiment.
In the above embodiment, a sheave may be provided on the center side instead of the curing carriage side.
Further, in the above embodiment, instead of expanding and contracting the jack member by a predetermined amount d, the jack member may be fixed at a length that allows for a predetermined amount d. In this case, in the concrete placing state of the section C shown in FIG. 10, the position of the curing carriage exceeds the section A and is located on the tunnel entrance side, but there is no problem in curing the section A.
Further, unlike the one described in the above embodiment, the curing carriage 2 may have a structure in which the arc-shaped frame member 221 (see FIG. 3) is not provided as shown in FIG. That is, a plurality of suspension members may be attached to the frame body 22 of the curing carriage 2 at intervals in the tunnel inner peripheral direction without providing the frame member 221 having a shape along the inner circumference of the tunnel. For example, the tip of the pillar member 222 on the inner peripheral surface side of the tunnel and the tip of the connecting member 223 on the inner peripheral surface side of the tunnel may be arranged in a shape along the inner circumference of the tunnel, and the suspension member may be attached to these tips.

Cn ... center, 1 ... curing device, 2 ... curing trolley, 22 ... frame body, 3 ... wire body, 31 ... sheave, 32 ... weight, 4 ... sheet body, Cr ... lining concrete, S ... curing space, T ... tunnel.

Claims (8)

It is a curing device that has an arc-shaped frame along the inner circumference of the tunnel and is arranged following the center where the lining concrete is placed between the inner circumference of the tunnel and the lining concrete.
A curing trolley that is positioned at predetermined intervals with respect to the center and has a frame shaped along the inner circumference of the tunnel.
A plurality of wire bodies stretched between the center and the curing carriage at intervals in the circumferential direction of the frame of the center and the curing carriage, and
A lining concrete provided with a sheet body supported by the wire body and laid inward along the inner peripheral surface of the lining concrete to cover the inner peripheral surface of the lining concrete and form a closed curing space. Curing device. A claim in which one end of the wire body is fixed to the center or the curing carriage, and a weight is attached to the other end of the wire body, and the other end is suspended from the curing carriage or a suspension member provided on the center. Item 1. The lining concrete curing device according to item 1. The lining concrete according to claim 1 and 2, wherein the length of the sheet body in the tunnel direction is made longer than the length of the centre, and the long portion is loosened in the closed curing space. Curing device. The lining concrete curing device according to any one of claims 1 to 3, wherein the curing carriage is movable in the longitudinal direction of the tunnel. A method for curing lining concrete, in which lining concrete is placed every fixed length section in the longitudinal direction of the tunnel, and then the placed lining concrete is cured by the curing device according to claim 1.
In order to place the lining concrete in the next section following the section in which the lining concrete has been placed, the center is moved forward in the longitudinal direction of the tunnel, and at the time of this movement, the rear end of the center moves. The step of moving the center until it exceeds the front end of the cast lining concrete by a predetermined length, and
A step of moving the curing trolley so that the rear end is located at the rear end of the lining concrete placed above.
The front end of the sheet body located at the rear end of the center is rolled up rearward and temporarily fixed to the front end surface of the cast lining concrete, and the inner peripheral surface of the cast lining concrete and the said. A method for curing lining concrete, which comprises a step of forming a closed space between the sheet body and the sheet body and using the space formed by rolling up the sheet body as a working space. The method for curing lining concrete according to claim 5, wherein the length of the curing device is longer than a predetermined length or more than the length of the section having a constant length. The length of the curing device is substantially equal to the length of the section, and the centre and the curing device are integrally moved so that the rear end of the centre exceeds the predetermined length of the front end of the cast lining concrete. The cover according to claim 5, further comprising a step of extending the jack member connecting the centle and the curing trolley to move and stop the curing trolley, and then retracting the curing trolley with respect to the center by the predetermined length. How to cure concrete. When the length of the curing device is substantially equal to the length of the section and the rear end of the centre is moved forward beyond the front end of the cast lining concrete by a predetermined length, the rear end of the curing device is moved forward. Claim 5 comprises a step of stopping the movement of the curing trolley when reaching the rear end of the provided lining concrete, extending the jack member connecting the centle and the curing trolley, and moving only the centle by a predetermined length. How to cure lining concrete as described in.

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