JP2006089995A - Curing device of tunnel lining concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical curing device of tunnel lining concrete extremely superior in workability, capable of curing while self-traveling in a small type with a simple structure, without requiring a stand for receiving a water droplet. <P>SOLUTION: This curing device of the tunnel lining concrete performs curing by spraying water on the placed tunnel lining concrete; and has a spraying mechanism 1 for spraying misty water on the tunnel lining concrete and a moving mechanism 2 for movably arranging the spraying mechanism 1 in a tunnel; and is constituted movable in the tunnel while spraying the misty water by a predetermined quantity on a surface of the tunnel lining concrete by this spraying mechanism 1 and the moving mechanism 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  Conventionally, curing of lining concrete placed on the inner surface of a tunnel (promoting hydration reaction) has been performed by manually applying water using a hose, etc., so watering tends to be incomplete, and time and labor are also required. Is extremely inefficient.

  Therefore, in recent years, a curing device as disclosed in JP 2001-248398 A (Patent Document 1) has been proposed.

  As shown in FIG. 1, the curing device disclosed in Patent Document 1 is provided with an arch-shaped water spray pipe 22 movably provided on a gantry 21 (cart) movable on a guide rail 23. Water is sprinkled from the water nozzle provided in 22 to cure the lining concrete, and can be cured more easily than when manually curing.

JP 2001-248398 A

  However, the method disclosed in Patent Document 1 has the following problems (1) to (4).

  (1) Because of curing by watering, the curing water falls as water droplets from the top or side of the lining concrete. If this falling water is left as it is, it will penetrate into the ground of the tunnel and cause mudification of the ground.

  For this reason, in Patent Document 1, the configuration is such that falling water is received by a pedestal as much as possible. Therefore, the pedestal must be elongated in the tunnel length direction, and becomes a large-scale facility to avoid a decrease in workability in the tunnel. I can't.

  (2) Further, as described above, since the structure is configured to receive the falling water by the gantry, the gantry cannot be moved until the falling water has subsided after the watering, and therefore the gantry is moved. Water spraying is not preferable, and in this respect, the degree of freedom is small and workability is unavoidable.

  (3) Moreover, in patent document 1, the moving means (guide rail 24, drive device, etc.) of a sprinkling pipe is needed separately from the moving means of a mount frame, and there is much waste.

  (4) Moreover, since a water control valve (electromagnetic valve) is attached to the water supply pipe, the amount of water sprayed from each water spray nozzle cannot be adjusted, and fine water spray control cannot be performed.

  There are also the following methods for curing tunnel lining concrete that do not involve human hands. That is, there is also a method of keeping the lining concrete warm and moisturized by attaching a cylindrical balloon of 30 cm thickness inflated with air to the concrete surface. However, in this case as well, it takes time to move and install the balloon, and a fixing frame facility is required to fix the balloon, so that equipment costs are incurred. The tunnel section is narrowed by the frame equipment, and it is likely to hinder transportation. For this reason, application in a tunnel having a small diameter section is particularly difficult.

  The present invention solves the above-described problems, and does not require a stand for receiving water droplets, and is a practical tunnel excellent in workability that can be cured while being self-propelled in a small size with a simple structure. A curing apparatus for lining concrete is provided.

  The gist of the present invention will be described with reference to the accompanying drawings.

  In a tunnel lining concrete curing device that sprays water on the tunnel lining concrete that has been placed, the spray mechanism 1 that sprays mist-like water onto the tunnel lining concrete, and the spray mechanism 1 is moved into the tunnel The spray mechanism 1 and the transport mechanism 2 are configured to be able to move in the tunnel while spraying a predetermined amount of the mist-like water on the surface of the tunnel lining concrete. The present invention relates to a tunnel lining concrete curing device.

  Further, in the curing apparatus for tunnel lining concrete according to claim 1, the spray mechanism 1 has a nozzle body 3 for spraying a predetermined amount of mist-like water with a predetermined particle size on the surface of the tunnel lining concrete. The present invention relates to a tunnel lining concrete curing device.

  Further, in the tunnel lining concrete curing apparatus according to claim 2, as the spray mechanism 1, a spray pipe 4 in which a plurality of nozzle bodies 3 are provided at predetermined intervals is adopted. It relates to a curing device.

  The tunnel lining concrete curing device according to claim 3, wherein the spray pipe 4 is set to have substantially the same shape as the inner shape of the tunnel and is moved in the longitudinal direction of the tunnel while spraying water. The present invention relates to a tunnel lining concrete curing device characterized by being configured to spray mist-like water over substantially the entire surface of the concrete.

  The tunnel lining concrete curing device according to any one of claims 2 to 4, wherein each nozzle body 3 is provided with a water control valve 10 for controlling a spray amount of mist-like water. It relates to the curing equipment for tunnel lining concrete.

  Moreover, in the curing apparatus for tunnel lining concrete according to any one of claims 1 to 5, the temperature of the mist water sprayed from the spray mechanism 1 is cured as much as possible on the surface of the tunnel lining concrete. The present invention relates to a curing apparatus for tunnel lining concrete, characterized in that a water temperature adjusting mechanism capable of adjusting to a temperature suitable for the above is provided.

  Moreover, in the curing apparatus for tunnel lining concrete according to any one of claims 1 to 6, the spray mechanism 1 is configured to be able to spray mist-like water having a diameter of 100 μm or less. The present invention relates to a tunnel lining concrete curing device.

  Moreover, in the curing apparatus for tunnel lining concrete according to any one of claims 1 to 7, a cradle 7 that moves on a guide rail 6 installed in the tunnel is adopted as the moving mechanism 2, and the receiving The spraying mechanism 1 is provided on the base 7, and it relates to the curing apparatus for tunnel lining concrete.

  Since the present invention is configured as described above, it becomes a practical tunnel lining concrete curing device excellent in workability and capable of curing while being self-propelled with a simple structure.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  A predetermined amount of mist-like water is sprayed from the spray mechanism 1 onto the tunnel lining concrete. Since the sprayed water is mist-like water, an appropriate amount adheres to the tunnel lining concrete, and the mist-like water floats in the tunnel and the inside of the tunnel is kept at an appropriate temperature and humidity. Therefore, the curing water does not fall as water droplets on the inner surface of the tunnel lining concrete, so there is no need for a large mount, and the tunnel lining concrete is cured while moving a small device with a simple structure. Furthermore, the tunnel lining concrete can be efficiently carried out without deteriorating workability in the tunnel, such as the necessity of moving means of the spray mechanism 1 separately from the moving means of the gantry as in Patent Document 1. Can be cured.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a tunnel lining concrete curing device for spraying water on a cast tunnel lining concrete and curing the sprayed mist water to the tunnel lining concrete, and the spray mechanism 1 The spray mechanism 1 and the transport mechanism 2 move the inside of the tunnel while spraying a predetermined amount of the mist-like water onto the surface of the tunnel lining concrete. It is configured to obtain.

  That is, in this embodiment, a centle for placing tunnel lining concrete is assembled in the tunnel, the tunnel lining concrete is placed using the centle, the centle is disassembled and moved, and then this placement is performed. It is used when curing the tunnel lining concrete.

  Each part will be specifically described.

  The spray mechanism 1 has a nozzle body 3 that sprays a predetermined amount of mist of water on the tunnel lining concrete surface. Specifically, as the spray mechanism 1, a plurality of nozzle bodies 3 are provided at predetermined intervals. A spray tube 4 is employed.

  In the present embodiment, the mist-like water refers to a floating body of water having a very slow drop speed. In general, the particle size of raindrops is about 2000 μm, and the falling speed (termination speed) is about 6.55 m / s. Below 100 μm, the falling speed is 100 μm, which is as slow as about 0.240 m / s. In particular, when the thickness is 50 μm or less, the drop speed is about 0.0707 m / s, which is preferable because the flight time becomes very long.

  The spray pipe 4 is set to have substantially the same shape as the inner shape of the tunnel, and is configured such that water can be sprayed on substantially the entire surface of the tunnel lining concrete by being moved in the longitudinal direction of the tunnel while spraying mist-like water. ing. Specifically, in this embodiment, a general arched tunnel is assumed, and an arched spray tube 4 as shown in FIG. 2 is employed.

  As the moving mechanism 2, a cradle 7 that moves on a guide rail 6 installed in the tunnel is employed. This pedestal 7 is not long in the tunnel length direction like the pedestal of Patent Document 1, but merely receives the spray tube 4. Further, the spray tube 4 is attached to an attachment fixing portion 7 a provided on the upper portion of the cradle 7.

  Therefore, in this embodiment, the mist-like water can be sprayed on the substantially entire surface of the tunnel lining concrete simply by spraying the mist-like water from the spray pipe 4 while moving the cradle 7.

  In the present embodiment, the spray pipe 4 having a shape substantially the same as the inner shape of the tunnel is adopted as the spray pipe 4, but other configurations, for example, a straight spray pipe 4 as shown in FIG. Is configured to move along a guide rail 9 having substantially the same shape as the inner shape of the tunnel, or a linear spray tube 4 is rotatably received via an arm 8 as shown in FIG. It may be pivotally attached to the base 7.

  In addition, the pedestal 7 is provided with legs 18 to which wheels that rotate on the guide rails 6 laid on the bottom surface of the tunnel are attached.

  In the present embodiment, the moving mechanism 2 adopts a structure in which the cradle 7 reciprocates on the guide rail 6 via wheels, but moves on another structure, for example, on the guide rail 6. Instead, it may be configured to be able to travel freely in the tunnel with tires. Further, in the present invention, the cradle 7 is not necessarily required, and for example, the moving mechanism 2 may be provided in the spray tube 4 itself. That is, any moving mechanism 2 may be employed as long as it can move in the tunnel while spraying mist-like water with the spray tube 4.

  In the case of the method of moving on the guide rail 6, the rail used in the centle can be used as it is, so that the workability is excellent, and in the case of the method of traveling with tires, the freedom of movement is large. The distance between the spray tube 4 and the concrete wall surface can be easily adjusted.

  Further, each nozzle body 3 is provided with a water control valve 10 for controlling the amount of sprayed mist water. Further, as the nozzle body 3 of the spray mechanism 1, one that sprays mist-like water having a particle diameter of about 100 μm is employed.

  Specifically, as shown in FIG. 5, the nozzle body 3 employs a two-fluid nozzle capable of spraying mist-like water with compressed air from the compressor 15, and the two-fluid nozzle is connected to the water pipe 4a. Is provided on the side of the air pipe 4b of the spray pipe 4 composed of the air pipe 4b, and water is supplied from the water pipe 4a through the water control valve 10. In the figure, reference numeral 11 is a water flow tube, and 17 is a cord reel.

  In this embodiment, ten nozzle bodies 3 are arranged in parallel at substantially equal intervals. However, the arrangement of the nozzle bodies 3 takes into consideration the spraying range, the spraying amount, the moving speed of the cradle 7 and the like. Set as appropriate.

The spraying is basically performed toward the concrete wall surface (for example, when the distance between the nozzle body 3 and the target concrete wall surface is short, the spraying is performed obliquely on the concrete wall surface).
Therefore, the spraying amount for each nozzle body 3 can be controlled by the water control valve 10, and proper curing can be performed based on the situation of each individual part (dry state, wind state, dew condensation state of the concrete surface, etc.). . Therefore, efficient curing can be performed with a small amount of mist-like water, and the water supply tank 14 can be made smaller accordingly.

  In this embodiment, the amount of sprayed water from the spray mechanism 1 is determined by sensing the humidity distribution on the surface of the tunnel lining concrete with a humidity sensor (not shown in FIG. 5). The control panel 16 automatically controls the water control valve 10, the pump 13 for supplying water to the water pipe 4 a, the compressor 15 for supplying compressed air to the air pipe 4 b, and the like so that the surface humidity is appropriate. .

  In the present embodiment, the spraying amount is automatically controlled, but it may be determined visually and controlled manually. In FIG. 5, the control cable from the control panel 16 to each water control valve 10 is omitted, but the above control can be performed wirelessly without using the control cable.

Specifically, the spraying amount is set to such an extent that water condensed on the surface of the tunnel lining concrete does not drip or fall (preferably about 100 cc to 200 cc per m ² ), and sprayed again when dried. The spraying interval, number of times, etc. vary depending on the situation at the time of construction and are appropriately determined based on the data.

  More specifically, control is performed by looking at wet / dry conditions (humidity), concrete temperature / temperature conditions, wind conditions, condensation on the concrete surface, and the like.

  Moreover, each nozzle body 3 controls the spraying amount by the water control valve 10 according to the state of individual places, such as a top part and a side surface. The overall control is performed by the pressure regulating valve 19. Reference numeral 20 denotes a pressure regulating valve that controls compressed air from the compressor 15.

  Therefore, it does not become a watering state (a state in which the water particle size is large and adheres to the tunnel surface or falls) as in the past, and the mist-like water sprayed from the spray tube 4 floats in the tunnel. The tunnel lining concrete surface adheres only to a predetermined amount held on the surface, does not excessively adhere to the concrete surface, and does not sag from the concrete surface and cause muddying of the roadbed.

  Therefore, unlike the conventional example, the cradle 7 of the present embodiment does not require a structure for receiving the falling water, so that the depth can be shortened compared to the conventional example, and while spraying mist-like water. Because it is possible to move, it is difficult to disturb the work in the tunnel.

  That is, according to this embodiment, the tunnel lining concrete can be cured efficiently, and the mist-like water from the spray pipe 4 floats in the tunnel, so that the humidity in the tunnel is appropriately maintained. As a result, the spraying interval can be increased and the cradle 7 can be made compact to realize a device with a high degree of freedom, thereby further improving the workability.

  Further, on the cradle 7, the temperature of the mist-like water ejected from the spray mechanism 1 becomes a temperature suitable for curing the tunnel lining concrete, for example, the spray tube 4 when it is cold. It is preferable to provide a heater or the like as a water temperature adjusting mechanism that uses hot water as the water supplied to the water. In this case, the rapid temperature change of the concrete due to the surrounding environment is reduced, and appropriate curing according to the environment such as cold or hot weather can be performed.

  Specifically, water is heated by a heat coil during cold weather, or cold water is secured using ice during hot weather.

  In addition, when spraying warm water during cold weather, the air around the concrete surface is warmed, the mist tends to float and moisture can be maintained for a long time. It is possible to prevent the temperature from increasing.

  Moreover, since it will have a bad influence on concrete curing if it is too high, it is preferable to set the temperature of the mist-like water sprayed on the tunnel lining concrete to about 20 ° C. to 40 ° C. so that there is not much difference from the concrete surface temperature. .

  Further, the water supply tank 14 may be placed and fixed on the receiving base 7 as the moving mechanism 2. In this case, the degree of freedom of the cradle 7 is further increased. Moreover, when not mounting and fixing to the receiving stand 7, it is good also as a structure which installs in a roadbed and supplies water using a flexible water supply pipe | tube.

  Since the present embodiment is configured as described above, when a predetermined amount of mist-like water is sprayed from the spray mechanism 1 onto the tunnel lining concrete, the sprayed water is mist-like water. Adhering and mist-like water floats in the tunnel, and the inside of the tunnel is kept at a suitable temperature and humidity. Therefore, the curing water does not fall as water droplets on the inner surface of the tunnel lining concrete, so there is no need for a large mount, and the tunnel lining concrete is cured while moving a small device with a simple structure. Furthermore, the tunnel lining concrete can be efficiently carried out without deteriorating workability in the tunnel, such as the necessity of moving means of the spray mechanism 1 separately from the moving means of the gantry as in Patent Document 1. Can be cured.

  In addition, as in the past, mist-like water is sprayed onto the concrete surface, so there is no concern about the muddying of the roadbed, and there is little drop of the curing water, so there is no need for a wide base that covers the area where the curing water falls It is sufficient that the cradle 7 can be mounted with the spray mechanism 1, and when the spray mechanism 1 is fixed, equipment for moving the spray mechanism 1 is not necessary, so that the apparatus can be made compact and simplified.

  Therefore, since an extremely small configuration can be realized as compared with the conventional case, the spray curing area can be freely changed, and appropriate curing can be performed.

  In addition, when the water supply tank 14 is placed and fixed on the cradle 7, the degree of freedom of movement is increased during spray curing.

  In addition, when the temperature of mist-like water is controlled and used as the optimal water temperature for curing, in this case, the rapid temperature change of the concrete due to the surrounding environment is reduced, depending on the environment such as cold and hot. You will be able to do proper curing.

  Moreover, since the spraying amount can be controlled by the water control valve 10 for each nozzle body 3, appropriate curing can be performed according to the situation of the individual location, and curing can be performed efficiently with a small amount of water.

  Therefore, the present embodiment is a practical tunnel lining concrete curing device that is excellent in workability and can be cured while being self-propelled with a simple structure.

It is a structure outline explanatory perspective view of a prior art example. It is a composition outline explanation perspective view of a present Example. FIG. 6 is a perspective view schematically illustrating the configuration of another example. FIG. 12 is a perspective view schematically illustrating the configuration of another example 2; It is a schematic explanatory drawing of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spraying mechanism 2 Moving mechanism 3 Nozzle body 4 Spraying tube 6 Guide rail 7 Receptacle
10 Water control valve

Claims (8)

  In a tunnel lining concrete curing device that sprays water on the tunnel lining concrete that has been placed, a spray mechanism that sprays mist-like water onto the tunnel lining concrete, and the spray mechanism can be moved freely into the tunnel A moving mechanism to be provided, and the spray mechanism and the moving mechanism are configured to be able to move in the tunnel while spraying a predetermined amount of the mist water on the surface of the tunnel lining concrete. Tunnel lining concrete curing equipment.   2. The tunnel lining concrete curing device according to claim 1, wherein the spray mechanism has a nozzle body for spraying a predetermined amount of water with a predetermined particle size on the surface of the tunnel lining concrete. Curing equipment for lining concrete.   3. The tunnel lining concrete curing device according to claim 2, wherein a spray pipe having a plurality of nozzle bodies provided at predetermined intervals is employed as a spray mechanism.   4. The tunnel lining concrete curing device according to claim 3, wherein the spray pipe is set to have substantially the same shape as the inner shape of the tunnel, and is moved substantially in the longitudinal direction of the tunnel while spraying water. A tunnel lining concrete curing device characterized by being configured to be sprayed with mist-like water.   The tunnel covering concrete curing device according to any one of claims 2 to 4, wherein each nozzle body is provided with a water control valve for controlling a spray amount of mist-like water. Concrete curing equipment.   The tunnel lining concrete curing device according to any one of claims 1 to 5, wherein the temperature of the mist water sprayed from the spray mechanism is suitable for curing the surface of the tunnel lining concrete as much as possible. A tunnel lining concrete curing device, characterized in that a water temperature adjustment mechanism capable of adjusting the temperature is provided.   The tunnel lining concrete curing device according to any one of claims 1 to 6, wherein the spray mechanism is configured to spray mist water having a diameter of 100 µm or less. Tunnel lining concrete curing equipment. The curing apparatus for tunnel lining concrete according to any one of claims 1 to 7, wherein a cradle that moves on a guide rail installed in the tunnel is adopted as a movement mechanism, and a spray mechanism is provided on the cradle. A tunnel lining concrete curing device characterized in that is provided.

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