JP2019002209A - Lining concrete curing device and curing method - Google Patents

Abstract

To ensure a tunnel concrete inner peripheral surface with a good quality by eliminating a blank time from completion of concrete casting to onset of curing during which curing cannot be implemented.SOLUTION: A curing device is disposed on rear side of a center Cn which has an arc-like frame body along a tunnel inner periphery and casts lining concrete Cr between the frame body and a tunnel T inner periphery, and cures the lining concrete Cr. The curing device comprises: a curing truck 2 which is positioned at a predetermined distance from the center Cn and has a frame body along the tunnel T inner periphery; wire bodies 3 which are placed in a tense state at intervals between the center Cn and the curing truck 2 in a circumferential direction of the center Cn and the frame body of the curing truck 2; and a sheet body 4 which is supported by the wire body 3 and installed on an inner side along an inner periphery of the lining concrete Cr and forms a closed curing space by covering the inner peripheral surface of the lining concrete Cr.SELECTED DRAWING: Figure 1

Description

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

  After lining concrete on the inner peripheral surface of the tunnel with a centle, curing is performed to prevent rapid drying of concrete and temperature changes in order to prevent cracking of the concrete. Conventionally, as shown in, for example, Patent Document 1, a curing cart having the same length as a centle in which a curing sheet is stretched in advance on the outer periphery of a frame is advanced following the centle, and the inner peripheral surface of the placed concrete. There has been proposed one in which a closed space is formed so as to cover the skin and is cured. In the curing device described in Patent Document 1, an overhang 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 overhang curing portion is set as a curing space for the curing carriage. By making contact with the (first space 26), the inner peripheral surface of the placed concrete is continuously covered.

JP 2010-156133 A

  However, in the case of using the above conventional curing cart, the centle that goes beyond the curing cart casts the lining concrete and moves forward, and prior to placing the lining concrete in the next section. The center is moved to the front, but the center is temporarily moved forward beyond the front end of the laid concrete to ensure a working space for the center. For this reason, there was a problem that a continuous curing space could not be formed during this time, and a blank time was generated during which the laid concrete was not cured.

  Therefore, the present invention solves such a problem, and it is possible to secure a good quality inner surface of the lining concrete of the tunnel by eliminating the blank time that cannot be cured after the lining concrete is placed until the start of curing. An object of the present invention is to provide a curing apparatus and curing method for concrete lining concrete.

  In order to solve the above-mentioned problems, the lining concrete curing device (1) of the first invention has a frame body having a shape along the inner periphery of the tunnel, and the lining concrete between the inner periphery of the tunnel (T). A curing device disposed subsequent to the centle (Cn) for placing (Cr) and curing the lining concrete (Cr), and positioned at a predetermined interval with respect to the centre (Cn), (T) The curing cart (2) having a frame (22) along the inner periphery, and between the centle (Cn) and the curing cart (2), the centr (Cn) and the curing cart (2) A plurality of wire bodies (3) stretched at intervals in the circumferential direction of the frame body, supported by the wire bodies (3), and laid inward along the inner peripheral surface of the lining concrete (Cr). Curing space closed over the inner surface of lining concrete (Cr) A sheet body (4) forming (S).

In the first aspect of the present invention, while the central work is being performed, the edge on the centle side of the sheet body is rolled up in the outer peripheral direction, and the edge is temporarily fixed to the end surface of the cast concrete. The closing property of the curing space covering the inner peripheral surface of the cast concrete is not impaired. Thereby, the favorable external air interruption | blocking curing which hold | maintained the heat | fever and water vapor | steam which emerge from lining concrete in the curing space can be performed.
In addition, since there is only a wire body and a sheet body between the centre and the curing cart, it interferes with the working platform and stairs of the centle, the keren device that cleans the centle surface, concrete placement piping, etc. A curing cart can be constructed without having to worry about avoiding.
In addition, since only the wire body and the sheet body exist between the centle and the curing cart, there is no obstacle to the keren work, and the kelen work can be efficiently performed and the kelen work time can be shortened.
Moreover, since an overhang | curing | curing | curing | curing part is unnecessary between a centre and a curing trolley | bogie, equipment cost can be suppressed.
In addition, when the centre is unframed or when the centle is clean, the sheet body can be slid on the wire body to appropriately form the opening.

  In the second invention, one end of the wire body (3) is fixed to the centle (Cn) or the curing cart (2), and a weight (32) is attached to the other end of the wire body (3), The other end is suspended from a suspension member (31) provided on the curing cart (2) or the centle (Cn). According to this, since the wire body between the center and the curing carriage is always given a constant tension, the sheet body is always supported, and the lining concrete can be cured even during the keren operation. Further, even when the interval between the curing cart and the centle fluctuates or the interval is adjusted and changed, the wire body is fed out or returned accordingly, and the tension of the wire body is kept constant by the weight.

  In this 3rd invention, the tunnel (T) direction length of the said sheet | seat body (4) is made longer than the length (section length) of a centle (Cr), The long part is made into the said closed curing space ( S) Let loosen in. Thereby, even if the space | interval of a curing trolley | bogie and a centle fluctuates, there is no trouble in a sheet body.

  In the fourth invention, the curing cart (2) is movable in the longitudinal direction of the tunnel (T). Thereby, the movement of the curing cart in the tunnel (T) is easy.

  In the fifth aspect of the present invention, the lining concrete (Cr) is laid by placing the lining concrete (Cr) in a section of a certain length in the longitudinal direction of the tunnel (T), and then placing the lining concrete (Cr). Is a curing method for lining concrete which is cured with the curing device of the first invention, and the lining concrete (Cr) in the next section following the section where the lining concrete (Cr) has been cast is placed. Therefore, the centle (Cn) is moved forward in the tunnel longitudinal direction, and the centle (Cn) is moved until the rear end of the centle (Cn) exceeds the front end of the placed lining concrete. ), A step of positioning the curing cart (2) at the rear end of the lining concrete (Cr) in which the rear end of the section is placed, and a position at the rear end of the centle (Cn) The front end of the sheet body (4) is raised rearward, temporarily fixed to the front end surface of the placed lining concrete (Cr), and the inner peripheral surface of the placed lining concrete (Cr); The method includes a step of forming a closed space (S) between the sheet body (4) and a space formed by raising the sheet body (4) as a work space.

  In the fifth aspect of the invention, the rear end of the centle moves the front end of the placed lining concrete beyond a predetermined length, and the rear end of the lining concrete in which the rear end of the curing device is placed in the section. And the front end of the sheet body located at the rear end of the centle is rolled up backward, temporarily fixed to the front end surface of the placed lining concrete, and the inside of the placed lining concrete Since the closed space is formed between the peripheral surface and the sheet body, the curing of the concrete is not interrupted even during the cleaning operation and cleaning of the center.

  In the sixth invention, the length of the curing device (1) is longer than a predetermined length by a predetermined length. As a result, even if the centle 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 has been placed. A closed curing space can be obtained simply by temporarily fixing to the front end surface of the concrete, and curing can be reliably performed.

  In the seventh aspect of the invention, the length of the curing device (1) is approximately equal to the (constant length) section length (centre length), and the centre (Cn) and the curing device (1) are moved together. Then, the rear end (front end of the curing device) of the centle (Cn) is moved beyond the front end of the placed lining concrete (Cr) by a predetermined length and stopped, and then the centre and the curing device are moved. Since the jack member (11) to be connected is extended so that the curing cart (2) is retracted by a predetermined length with respect to the centle (Cn), the front end of the sheet body is driven at substantially the same time as the backward movement. A closed curing space (S) can be obtained simply by temporarily fixing to the front end surface of the lining concrete, and curing can be reliably performed.

  In this 8th invention, the length of the said curing apparatus (1) is substantially equal to the section length (centre length) of a fixed length, and the rear end of the centle (Cn) is made of the laid concrete (Cr). When moving beyond a 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 cart (2) is stopped, The jack member (11) connecting the centle (Cn) and the curing cart (2) is extended so that only the centle (Cn) is moved by a predetermined length. Rolling up the front end to the rear, and temporarily fixing the front end surface of the placed lining concrete, a closed space is obtained between the inner peripheral surface of the placed lining concrete and the sheet body, Can be cured reliably.

  The reference numerals in the parentheses refer to the correspondence with specific means described in the embodiments described later.

  As described above, according to the curing apparatus for tunnel-casting concrete 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 after the casting of concrete until the start of curing.

It is a whole side view of the curing device of the present invention located behind the center. It is an enlarged side view of a curing device. It is the cross-sectional view of the curing apparatus along the III-III line of FIG. 2, and it is the figure which also drew the front of the curing cart. FIG. 3 is a cross-sectional view of the curing device along the line III-III in FIG. 2, in which the front side of the curing cart is omitted. It is a side view of a wire body suspension part. It is a front view of a wire body suspension part. It is a side view of a partition plate installation part. It is a whole side view at the time of a curing apparatus movement. It is a principal part enlarged side view at the time of curing apparatus movement. It is a whole side view at the time of a curing apparatus movement. It is a principal part enlarged side view at the time of curing apparatus movement. It is the cross-sectional view of a curing device, and is the figure which also drawn the front which shows the other example of a curing cart.

  The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

  FIG. 1 shows an overall side view of a tunnel lining concrete curing device 1. In FIG. 1, a known centle Cn having a frame of a predetermined length for placing lining concrete Cr (hereinafter sometimes simply referred to as concrete) on the inner periphery of the tunnel T is located in the tunnel. Yes. Further, a curing cart 2 constituting a curing device 1 that is shorter than the center Cn is located behind the center Cn by a predetermined distance in the longitudinal direction of the tunnel T and behind it (to the left of the tunnel entrance side in FIG. 1). Yes.

  In FIG. 1, section A is a concrete placing section by centle Cn, section B is a curing section of laid concrete Cr, and section C is a next concrete placing section. Each of the sections A to C is equal in length to the length of the frame of the centile Cn, and the curing cart 2 is located at the rear end of the section B. The center Cn and the curing cart 2 are movable 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 cart 2 are connected to each other by an adjustable jack member 11 so that the distance between them can be adjusted. Further, the curing cart 2 moves following the movement of the center Cn. It has become.

  FIG. 2 shows an enlarged side view of the curing cart 2. FIG. 3 is a cross-sectional view of the tunnel along the line III-III in FIG. 2, and also shows the front of the curing cart 2 seen from this direction, and FIG. 4 is also a tunnel along the line III-III. It is the figure which omitted the front of the curing cart 2 in the cross-sectional view. As shown in FIG. 4, since only the wire body 3 and the sheet body 4 exist between the rear end of the center Cn and the curing cart 2, there is no congestion with the stairs and work scaffolds provided at the rear end of the center Cn. Therefore, keren work and the like at the center Cn can be performed efficiently. The curing carriage 2 is constructed by framing a frame body 22 on left and right bases 21 (FIG. 3) that can move on the rail R by wheels, and the frame body 22 includes an arc-shaped member 221 curved in a tunnel shape, It comprises a column member 222 that supports the arc-shaped member 221, and a connecting member 223 that connects the column member 222 and the arc-shaped member 221, and the outer periphery of the arc-shaped member 221 is a circle along the inner peripheral surface of the tunnel T. An arc shape is formed, and a space of an arc cross section is formed between the inner peripheral surface of the concrete Cr and positioned inward by a certain distance from the inner peripheral surface of the concrete Cr placed on the inner peripheral surface of the tunnel T. . A wire body 3 is stretched between the arcuate member 221 on the outer peripheral portion of the frame body 22 and the centile Cn 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 a rear end outer peripheral edge 12 (FIG. 2) of the centle Cn having substantially the same diameter as the outer periphery of the arc-shaped member 221 of the frame body 22 of the curing carriage 2. Each wire body 3 extends rearward from one end thereof in parallel with each other and in parallel with the inner periphery of the tunnel T, and the other end is fixed to a corresponding position of the outer peripheral edge of the arc-shaped member 221 of the curing cart 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-like weight 32 (FIG. 6) is attached to the lower end (the other end) of each hanging wire body 3.

  With such a structure, a constant tension is applied to each wire body 3. In addition, even when the distance between the curing cart 2 and the centile Cn changes during traveling or the distance is adjusted and changed, the sheave 31 rotates in accordance with this and the wire body 3 is fed or returned, 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 distance between the curing carriage 2 and the centle Cn may fluctuate when the curing carriage 2 moves back and forth and right and left, but in this case as well, the tension of the wire body 3 is always kept constant. Be drunk.

  Then, on the outside 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 as shown in FIG. 3 and FIG. The body 4 is put on these so as to be supported by the plurality of wire bodies 3. The sheet body 4 has a length equal to or longer than the length of the section B (FIG. 1) (therefore, the length of the sections A and C), and the longer portion is relaxed in a wave shape between the curing cart 2 and the centle Cn. It is settled in. The sheet body 4 has a width equal to the length of the arc shape in the arc-shaped tunnel circumferential direction, and the lower end 42 of the sheet body 4 at the left and right lower ends of the curing cart 2 in the tunnel cross-sectional direction. A pressing member 421 is appropriately placed on the end of the sheet body 4 so as not to bend. As a result, a closed space having a circular arc cross section, that is, a curing space S (FIG. 3) is formed inward along the inner peripheral surface of the laid concrete Cr placed over the entire area of the section B which is a curing section. The sheet body 4 is attached with a locking tool (not shown) for locking the sheet body 4 to the wire body 3 at a necessary portion.

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

  In FIG. 7, the standing partition plate 5 protrudes toward the inner peripheral surface of the concrete Cr, and its tip end is in contact with the inner peripheral surface of the concrete Cr and is curved. The partition plate 5 provided on the curing carriage 2 and the sheet body 4, the lower ends 42 and 42 on both sides of the sheet body 4 and the front end of the sheet body 4 that are prevented from being caught by the pressing members 421 and 421 are fixed. The centre Cn frame outer peripheral edge has a rear end surface 13 (FIG. 2) of the entire outer peripheral edge 12 covering the inner peripheral surface of the concrete Cr and is substantially equal to the length of the section B (FIG. 1). A closed curing space S is formed.

  A curing method using the curing device 1 having such a structure, that is, the curing carriage 2, the wire body 3, and the sheet body 4 will be described below. When the concrete placement in the section A in FIG. 1 is finished, the centle Cn and the curing device 1 move toward the next concrete placement section C. At this time, prior to the new concrete placement, the work of the frame of the center Cn is performed. In order to secure the space for the keren work, the centle Cn is entered into the section C by a predetermined length d (for example, 0.5 to 2.0 m) and stopped (FIG. 8). In the past, due to this keren work, the subsequent curing cart could not move to section A, and several hours of blank time occurred in curing the placed concrete.

  In this embodiment, as shown in FIG. 8, since the rear end of the curing cart 2 also enters the section A by a predetermined amount d, the jacking member 11 is extended by a predetermined length d, and the curing cart 2 is moved backward so that the center While expanding the space | interval of Cn and the curing cart 2, the part which the sheet | seat body 4 gathered is extended, and the tunnel entrance side edge of the frame 22 of the curing cart 2 is made to correspond with the boundary of the area A.

  When carrying out the cleansing operation on the frame of the center Cn, as shown in FIGS. 9 (1) to (2), the edge 41 on the side of the center Cn of the sheet body 4 is set to the rear end frame of the frame of the center Cn. Remove from the fixed state of the body 13, roll up in the outer peripheral direction, and temporarily fix it to the end surface of the cast concrete Cr in the section A with a nail 42 or the like using an eyelet hole (not shown) attached to the end portion. . If it does in this way, the closing nature of the curing space S which covers the inner peripheral surface of placement concrete Cr will not be spoiled, and the good outside air interception curing which kept the heat and water vapor from placement concrete Cr in curing space S should be performed. Can do. In this way, the conventional problem that the concrete Cr cannot be cured during the kelen work of the centile Cn and a blank time of several hours is generated is avoided. In addition, by raising the sheet body 4, a sufficient space for the keren work is formed between the center Cn and the sheet body 4.

  The centile Cn that has finished the cleansing work retreats so that the outer periphery of the frame coincides with the section C (FIG. 10). At this time, the jack member 11 is returned to the original length simultaneously with the retreat of the centle Cn. That is, as shown in FIGS. 11 (1) to 11 (2), prior to retracting the centle Cn, the end 41 of the sheet body 4 is temporarily removed and returned to the wire body 3 and the centre Cn frame is removed. It is fixed to the rear end frame 13 of the body. Thereafter, while the jack member 11 is contracted, the center Cn is retracted, and the curing space S is closed at the end 13 of the frame. At this time, the tunnel entrance side of the curing space S is closed by the partition plate 5 provided in the curing cart 2 (FIG. 10). In this way, even during the cleansing operation of the centile Cn, the outside air blocking curing is performed without causing a blank time after placing the concrete. According to the curing device 1 of the present embodiment, since only the wire body 3 and the sheet body 4 exist between the centle Cn and the curing cart 2, the centle scaffolding, staircase, keren device, and placement are provided as in the conventional curing cart. Curing work can be performed without taking into consideration interference with piping and the like.

  In the above-described embodiment, the case where the bracket 311 and the sheave 32 are provided on the centle side of the arc-shaped member 221 of the curing cart 2 has been described, but the bracket 311 and the sheave 32 may be provided on the tunnel entrance side of the arc-shaped member 221. Good. According to this, since the wire body 3 can be stretched around the upper portion of the frame body 22, the sheet body 4 on the upper portion of the curing cart 2 can be supported by the wire body 3. Moreover, in the said embodiment, although the frame 22 of the curing cart 2 was provided in the longitudinal direction of the tunnel on the base 21 (FIG. 2), only one line may be arranged in the center part of the base 21. good.

Further, instead of moving the curing cart 2 backward, the center member Cn is moved and at the same time the jack member 11 is extended by a predetermined amount d so that the distance between the center Cn and the curing cart 2 is increased, and at the same time the sheet body 4 The rear end edge of the frame body 22 of the curing cart 2 may be made to coincide with the boundary of the section A by extending the amount that has been gathered.
Furthermore, the distance between the rear end of the centle Cn and the rear end of the curing cart 2 may be set in advance to be equal to or greater than the distance obtained by adding the predetermined length d to the concrete placing section length A (B).
In order to extend the jack member 11, the sheet body 4 has a length in the tunnel direction added to the section A by a predetermined length d or more. When the jack member 11 is not extended, the sheet body 4 is loosened in the curing space S. If it does in this way, even if the jack member 11 is extended to predetermined length d, the edge 41 by the side of the centle Cn of the sheet | seat body 4 will not be peeled from the rear end edge of the centle 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 a partition plate 5 provided on the curing cart 2. Further, both side ends 42 of the sheet body 4 are always closed by pressing members 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 performed by a spring member, for example.
In place of the sheave, for example, a simple rod body can be used as a suspension member for suspending the wire body.
Moreover, when the space | interval of a curing cart and a centle or the front and back centles does not change, it is good also as a structure which fixes the both ends of a wire body to a curing cart or a centle.
In addition, it is possible to provide a spray nozzle and a blower and perform wet curing with the curing apparatus of the first embodiment.
In the above embodiment, a sheave may be provided on the centle side instead of the curing cart side.
Furthermore, 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 the predetermined amount d. In this case, in the concrete pouring state of the section C shown in FIG. 10, the position of the curing carriage is positioned on the tunnel entrance side beyond the section A, but there is no problem for the curing of the section A.
Moreover, unlike what was demonstrated in the said embodiment, it is good also as a structure which does not provide the circular-arc-shaped frame member 221 (refer FIG. 3) in the curing cart 2 as shown in FIG. That is, a plurality of suspension members may be attached to the frame body 22 of the curing cart 2 at intervals in the tunnel inner peripheral direction without providing the frame member 221 having a shape along the inner periphery of the tunnel. For example, the front end of the pillar member 222 on the inner peripheral surface side of the tunnel or the front end of the connecting member 223 on the inner peripheral surface side of the tunnel may be arranged in a shape along the inner periphery of the tunnel, and the suspension member may be attached to the front end.

Cn: Centle, 1 ... Curing device, 2 ... Curing cart, 22 ... Frame body, 3 ... Wire body, 31 ... Sheave, 32 ... Weight, 4 ... Sheet body, Cr ... Covering concrete, S ... Curing space, T ... tunnel.

Claims (8)

A curing device that has an arc-shaped frame body along the inner periphery of the tunnel and is disposed subsequent to the centle for placing the lining concrete between the inner periphery of the tunnel and cures the lining concrete,
A curing cart that is positioned at a predetermined interval with respect to the centle and has a frame shaped along the inner periphery of the tunnel;
Between the centle and the curing cart, a plurality of wire bodies stretched at intervals in the circumferential direction of the frame of the centle and the curing cart,
A lining concrete comprising: a sheet body supported by the wire body and laid inward along the inner peripheral surface of the lining concrete to form a closed curing space covering the inner peripheral surface of the lining concrete. Curing equipment. One end of the wire body is fixed to the centle or the curing cart, a weight is attached to the other end of the wire body, and the other end is suspended from a suspension member provided on the curing cart or the centle. Item 1. A lining concrete curing device according to item 1. The length of the sheet body in the tunnel direction is longer than the length of the centle, and the length of the sheet body is loosened in the closed curing space. Curing equipment. The lining concrete curing device according to any one of claims 1 to 3, wherein the curing cart is movable in a tunnel longitudinal direction. It is a curing method for lining concrete in which lining concrete is placed for each section of a certain length in the longitudinal direction of the tunnel, and subsequently the laid concrete is cured with the curing device according to claim 1,
In order to place the lining concrete of the next section following the section where the lining concrete has been placed, the centle is moved forward in the longitudinal direction of the tunnel. Moving the centle until the front end of the placed lining concrete exceeds a predetermined length;
Moving the curing cart so that the rear end thereof is located at the rear end of the placed lining concrete;
The front end of the sheet body located at the rear end of the centle is rolled up backward, temporarily fixed to the front end surface of the placed lining concrete, and the inner peripheral surface of the placed lining concrete and the A method for curing lining concrete, comprising a step of forming a closed space between the sheet body and using the space formed by rolling up the sheet body as a work space. 6. The method of curing a lining concrete according to claim 5, wherein the length of the curing device is longer than a predetermined length by a predetermined length. The length of the curing device is substantially equal to the length of the section, the centle and the curing device are moved together, and the rear end of the centle exceeds a predetermined length than the front end of the placed lining concrete. 6. The cover according to claim 5, further comprising a step of extending the jack member for connecting the centle and the curing cart, and then retracting the curing cart by the predetermined length with respect to the centle. Curing method for engineering concrete. When the length of the curing device is substantially equal to the length of the section and the rear end of the centle moves forward a predetermined length beyond the front end of the laid concrete, the rear end of the curing device is 6. The method comprises the steps of stopping the movement of the curing cart when reaching the rear end of the lining concrete provided, and extending a jack member connecting the centle and the curing cart to move only the centle for a predetermined length. Curing method for lining concrete described in 1.

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