Formwork Unit for Waterways

Abstract

To provide a form unit for a waterway capable of efficiently vibrating concrete in a form part without impeding the flow of concrete in a supply part.SOLUTION: In this form unit for a waterway, a drain opening forming mold and a waterway forming mold hang down from upper surface forms 50a, 50b, and do not have a side wall. The upper surface forms 50a, 50b close an upper surface opening of a groove 5, and concrete is filled in the groove 5. Therefore, a gutter 16 having a tubular waterway 12 can be continuously constructed in the groove 5 having a width almost equal to the width of the gutter 16. In addition, in this form unit for a waterway, a transmission member 34 that transmits power to a vibration device 30 passes through a first waterway forming mold 56a. Therefore, the vibration device 30 is positioned horizontally below a supply part 40, and a body part of the vibration device 30 that vibrates the most can be positioned in the center part of the groove 5. This allows the vibration device 30 to maximize its capacity and vibration effect, and the supplied concrete can be vibrated efficiently.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a formwork unit for a water channel that constructs a tubular water channel in a groove while moving together with a construction vehicle and placing concrete.

Background Art

[0002] For example, in tunnels, roads, etc. where vehicles can pass, there are tubular water channels inside for draining rainwater, etc., and side grooves with drainage openings on the upper surface are constructed along the edge of the road. When constructing such side grooves, the inventors of the present application have made the inventions described in the following [Patent Document 1] and [Patent Document 2], in which concrete is filled into a formwork while moving together with a construction vehicle to continuously form a side groove having a tubular water channel.

[0003] Here, when forming a side groove later by repair or renovation, etc. on a road where the road surface has already been completed, etc., the place where the side groove is to be formed is excavated to form a groove, and a side groove is formed in this groove. However, the inventions described in the above [Patent Document 1] and [Patent Document 2] are for ground construction in which a side groove is constructed on the ground at a stage prior to constructing the road surface, and the dimensions of the formwork part are large, making it difficult to construct a side groove in a narrow groove. To address this problem, the following [Patent Document 3] discloses an invention related to a water channel forming formwork corresponding to underground drop-in construction capable of constructing a side groove in an excavated groove.

Prior Art Documents

[0005] However, in the invention described in [Patent Document 3], the vibration device that vibrates the concrete is installed through the supply section that supplies the concrete, which obstructs the flow of the concrete and causes problems such as wear of the transmission member that transmits power to the vibration device due to friction with the concrete. In addition, there are problems such as the difficulty of cleaning and the increased amount of concrete remaining in the supply section. Furthermore, because the vibration device is installed through the supply section, the installation direction of the vibration device is vertical. However, normally, a roughly U-shaped reinforcing bar 6 with an open top, as shown in Figure 3(b), is installed in the groove 5. In this case, if the installation direction of the vibration device is vertical, the vibration device must pass through the gap at the top of the reinforcing bar 6, and there is a high risk of contact between the vibration device and the reinforcing bar 6 causing problems. Also, when constructing a side ditch 16 with a narrow drainage opening 14, the gap at the top of the reinforcing bar 6 is also narrow, and even if the vibration device and the reinforcing bar 6 do not directly contact each other, there is a possibility that the vibration of the vibration device will be transmitted to the reinforcing bar 6 and interfere, causing problems. Furthermore, a standard rod-shaped vibration device generally has the characteristic that the tip of the vibrating body does not vibrate. Therefore, if the vibration device is installed vertically, in order to transmit vibrations to the lower part of the structure, the vibration device needs to be inserted deep into the groove 5, with its tip near the bottom of the groove 5. However, because reinforcing bars 6 are present in the groove 5, the vibration device cannot be inserted deeply, and the tip of the vibration device that does not vibrate will be located almost in the center of the groove 5 (formwork section), while the body of the vibration device that vibrates the most will be located at the top or supply section of the groove 5 (formwork section). As a result, the capacity of the vibration device cannot be effectively utilized, and there is a possibility that a vibration-free zone will be created where vibrations are not transmitted to the bottom of the groove 5 because the non-vibrating part of the tip of the vibration device is located in the central part.

[0006] This invention has been made in view of the above circumstances, and aims to provide a formwork unit for a waterway that does not obstruct the flow of concrete in the supply section and can efficiently vibrate the concrete in the formwork section. [Means for solving the problem]

[0007] The present invention (1) Fixed to a drivable construction vehicle 20 and moving together with the construction vehicle 20 , within the groove 5 formed by excavation on the already completed road surface Fill with concrete 、 A formwork unit for a water channel, which is used to construct a side ditch 16 having a tubular water channel 12, The system comprises a formwork section for constructing the side ditch 16, and a supply section 40 for supplying concrete to the formwork section. The aforementioned formwork section is Without side walls, The system comprises: a first upper formwork 50a that covers the upper surface of the groove 5 and is located in front of the supply unit 40; a second upper formwork 50b that covers the upper surface of the groove 5 and is located behind the supply unit 40; a first drain outlet forming mold 54a that hangs down from the first upper formwork 50a; a second drain outlet forming mold 54b that hangs down from the second upper formwork 50b; a substantially cylindrical first water channel forming mold 56a fixed to the lower end of the first drain outlet forming mold 54a; a substantially cylindrical second water channel forming mold 56b fixed to the lower end of the second drain outlet forming mold 54b; a vibration device 30 located below the supply unit 40 that vibrates the supplied concrete; and a transmission member 34 that transmits power to the vibration device 30. The first channel forming mold 56a is provided with a through hole 58 in the axial direction, the transmission member 34 passes through the through hole 58, and the vibrating device 30 protrudes from the rear end of the first channel forming mold 56a and is located within the supply unit 40. death, moreover, The vibrating device 30 is located between the rear end surface of the first channel forming mold 56a and the front end surface of the second channel forming mold 56b. It is provided so as to protrude rearward from the rear end of the first channel forming mold 56a, and its tip does not come into contact with the second channel forming mold 56b, and furthermore, it has a smaller diameter than the first channel forming mold 56a and the second channel forming mold 56b, The first channel forming mold 56a and the second channel forming mold 56b are located within region A, which, when viewed from the axial direction of the first channel forming mold 56a and the second channel forming mold 56b, do not extend beyond the circumferential surface of the first channel forming mold 56a and the second channel forming mold 56b, and the installation angle is The first channel forming mold 56a and the second channel forming mold 56b are offset from the axis of the first channel forming mold 56a and the second channel forming mold 56b It is characterized by being fixed in a diagonally downward position. water The above problems are solved by providing a road formwork unit 80. [Effects of the Invention]

[0008] In the waterway formwork unit according to the present invention, the transmission member of the vibration device passes inside the front first waterway forming mold, which is roughly cylindrical in shape. As a result, the vibration device is positioned laterally, and the most vibrating part of the vibration device can be positioned approximately in the center of the groove. This allows the vibration effect of the vibration device to be maximized, and the supplied concrete can be vibrated efficiently. In addition, the vibration device does not come into contact with the reinforcing bars, allowing for the construction of a high-quality side ditch. Furthermore, since the transmission member passes inside the first waterway forming mold, it does not obstruct the flow of concrete in the supply section and formwork section, and wear of the transmission member can also be prevented. [Brief explanation of the drawing]

[0009] [Figure 1] This diagram illustrates a method for using the formwork unit for waterways according to the present invention. [Figure 2] This figure shows a formwork unit for waterways according to the present invention. [Figure 3] This diagram illustrates the target of the waterway formwork unit according to the present invention. [Modes for carrying out the invention]

[0010] An embodiment of the waterway formwork unit 80 according to the present invention will be described with reference to the drawings. Note that the concrete supply vehicle and the poured concrete are not shown in Figure 1.

[0011] First, as shown in Figure 1, the formwork unit 80 for waterways according to the present invention is fixed to a movable construction vehicle 20, and while moving together with the construction vehicle 20, it continuously constructs a side ditch 16 having a tubular waterway 12 as shown in Figure 3(c) within a trench 5 formed by excavation or the like.

[0012] Next, the formwork unit 80 for waterways according to the present invention will be described. Here, Figures 2(a), (b), (c), and (d) are a side view, bottom view, rear view (viewed from the rear in the direction of travel of the formwork unit 80 for waterways), and a schematic cross-sectional view of the formwork unit 80 for waterways according to the present invention. In Figure 2, the white arrows indicate the direction of travel of the construction vehicle 20 and the formwork unit 80 for waterways, and the front side of the formwork unit 80 for waterways means the front with respect to this direction of travel. Also, the rear side of the formwork unit 80 for waterways means the rear with respect to this direction of travel.

[0013] Furthermore, the waterway formwork unit 80 according to the present invention has a formwork section for constructing a tubular waterway 12, and a supply section 40 for supplying concrete to the formwork section. The formwork section also has a first upper formwork 50a located in front of the supply section 40, a second upper formwork 50b located behind the supply section 40, a first drain outlet forming mold 54a hanging down from the first upper formwork 50a, a second drain outlet forming mold 54b hanging down from the second upper formwork 50b, a first waterway forming mold 56a fixed to the lower end of the first drain outlet forming mold 54a, a second waterway forming mold 56b fixed to the lower end of the second drain outlet forming mold 54b, a vibration device 30 located below the supply section 40 that vibrates the supplied concrete, and a transmission member 34 that transmits power to the vibration device 30.

[0014] Furthermore, the supply unit 40 is installed near the center front of the waterway formwork unit 80, with its lower part connected to the formwork section and its upper part opening as a hopper section. Also, as mentioned above, the vibration device 30 is located below the supply unit 40. When the waterway formwork unit 80 is in use, the supply end of a concrete supply device (not shown) is located above the supply unit 40 (hopper section), and ready-mixed concrete is supplied from the concrete supply device into the supply unit 40.

[0015] In addition, the formwork part has the first upper surface formwork 50a and the second upper surface formwork 50b as described above, and the first upper surface formwork 50a and the second upper surface formwork 50b function to close the upper surface of the groove 5 formed by excavation or the like as shown in Fig. 1(a). Note that since the water channel formwork unit 80 according to the present invention constructs the water channel 12 by filling the groove 5 with concrete, it does not have side walls that the conventional formwork unit has.

[0016] In addition, the first drain port forming mold 54a and the second drain port forming mold 54b hanging down from the first and second upper surface formworks 50a and 50b respectively connect the first upper surface formwork 50a, the second upper surface formwork 50b and the first water channel forming mold 56a, the second water channel forming mold 56b respectively, and serve as a mold for the drain port 14 penetrating from the upper surface of the side groove 16 to the water channel 12.

[0017] In addition, the axes of the first water channel forming mold 56a and the second water channel forming mold 56b are parallel to the long side direction of the formwork part, and they are respectively suspended and held below the upper surface formworks 50a and 50b through the drain port forming molds 54a and 54b. And the water channel forming molds 56a and 56b serve as molds for the tubular water channel 12 formed in the side groove 16. For this reason, although the shapes of the water channel forming molds 56a and 56b vary depending on the required shape of the water channel 12, generally they are approximately circular or elliptical, and thus the shapes of the water channel forming molds 56a and 56b exhibit a substantially cylindrical shape such as a cylindrical shape or an elliptical cylindrical shape. Note that in the water channel formwork unit 80 according to the present invention, in order to pass the transmission member 34 of the vibration device 30 through the inside of the first water channel forming mold 56a, at least the first water channel forming mold 56a has a through hole 58 in the axial direction, and preferably a cylindrical member is used.

[0018] In addition, it is preferable to provide a reinforcing bar holder 32 in the formwork part for hooking and holding the side groove reinforcing bars 6 arranged in the groove 5 in a hollow state. Note that the reinforcing bar holder 32 is a metal bar with sharp ends at both ends, and is installed on the first water channel forming mold 56a and the second water channel forming mold 56b through attachment members 32a. At this time, the attachment members 32a have a shape that avoids the reinforcing bars 6 so as not to interfere with the reinforcing bars 6.

[0019] Furthermore, the vibration device 30 can be a well-known concrete vibrator such as a hydraulic or electric type. The transmission member 34 that transmits power to the vibration device 30 is a hydraulic tube if the vibration device 30 is a hydraulic concrete vibrator, and a power cable if it is an electric concrete vibrator. In the water channel formwork unit 80 according to the present invention, the vibration device 30 is provided so as to protrude rearward from the rear end of the first water channel forming mold 56a. Therefore, the vibration device 30 is located below the supply section 40 between the first water channel forming mold 56a and the second water channel forming mold 56b. The transmission member 34 of the vibration device 30 is pulled out from the front end of the first water channel forming mold 56a through a through hole 58 in the first water channel forming mold 56a and connected to a power source (not shown) installed on the construction vehicle 20 side. In this configuration, the transmission member 34 is pulled out from the front end of the first channel-forming mold 56a, which is not filled with concrete. Therefore, the transmission member 34 does not come into contact with the concrete, and the transmission member 34 does not obstruct the flow of concrete in the supply section 40 and the formwork section. Furthermore, because the transmission member 34 does not come into contact with the concrete, there is no wear of the transmission member 34 due to friction with the concrete. In addition, because the transmission member 34 does not come into contact with the concrete, cleaning the formwork section is easier, and the amount of concrete remaining in the formwork section is reduced because concrete does not adhere to the transmission member 34.

[0020] Furthermore, the vibrating device 30 is installed within a roughly cylindrical region A located between the rear end surface of the first channel-forming mold 56a and the front end surface of the second channel-forming mold 56b, specifically between the channel-forming molds 56a and 56b shown by the dashed lines in Figures 2(a) and (b), and not extending beyond the circumferential surfaces of the channel-forming molds 56a and 56b when viewed from the axial direction. ru. If the vibrating device 30 is installed extending beyond area A, the reinforcing bars 6 must be designed to take into account the extension of the vibrating device 30 so that they do not come into contact with it. However, by keeping the vibrating device 30 within area A, the reinforcing bars 6 only need to be designed to avoid contact with the water channel forming types 56a and 56b, making the design and on-site construction of the reinforcing bars 6 much easier.

[0021] Furthermore, in the waterway formwork unit 80 according to the present invention, since the transmission member 34 passes inside the first waterway forming mold 56a, the vibration device 30 can be installed in a substantially horizontal direction. As mentioned above, if the vibration device 30 is installed vertically, it is necessary to pass the vibration device 30 through the gap above the reinforcing bars 6, and there is a high risk of contact between the vibration device 30 and the reinforcing bars 6. Also, the vibration device 30 cannot be inserted deeply, and the tip of the vibration device 30 that does not vibrate is located almost in the center of the groove 5 (formwork part), while the body of the vibration device 30 that vibrates the most is located at the top of the groove 5 (formwork part) or the supply part 40, which is extremely inefficient. Moreover, since the non-vibrating part of the tip of the vibration device 30 is located in the central part, there is a possibility that vibration will not be transmitted to the bottom of the groove 5. In contrast, in the waterway formwork unit 80 according to the present invention, the vibration device 30 can be installed in a substantially horizontal direction, so there is no risk of contact with the reinforcing bars 6. Furthermore, by positioning the vibration device 30 horizontally below the supply unit 40, the most vibrating part of the vibration device 30 is positioned in the center of the groove 5 (formwork section). This allows the vibration device 30 to exert its maximum capacity and vibration effect. In addition, the vibration influence range of a typical rod-shaped vibration device 30 is said to be 4 to 6 times the diameter of the vibration device 30 in the radial direction. Therefore, by installing the vibration device 30 horizontally, sufficient vibration can be transmitted to the bottom of the groove 5. This allows for extremely efficient vibration of the concrete. The installation angle of the vibration device 30 is fixed at an angle downward within the range of 0° to -30° relative to the direction of travel of the formwork section within the range of area A. ru. In this configuration, the vibration direction of the vibration device 30 is offset from the axis (or normal direction) of the channel-forming molds 56a and 56b, allowing the concrete in the formwork section to be vibrated more efficiently.

[0022] Next, the method of use and operation of the waterway formwork unit 80 according to the present invention will be described. First, as shown in Figure 3(a), the location where the side ditch 16 will be formed is excavated to form a groove 5 along the road surface 3. Next, as shown in Figures 3(b) and 3(b'), predetermined reinforcing bars 6 are installed in the groove 5. Figure 3(b') is a schematic diagram of the groove 5 viewed from the side. These reinforcing bars 6 have a roughly U-shape with the top open when viewed from the end face direction, as shown in Figure 3(b).

[0023] Next, the waterway formwork unit 80 is fixed to the construction vehicle 20. Then, the construction vehicle 20 is moved to position the waterway formwork unit 80 above the groove 5. At this position, there are no reinforcing bars 6, or there is a sufficient opening for the waterway forming molds 56a and 56b to enter and exit. Then, the vertical position of the waterway formwork unit 80 is adjusted so that the upper formwork 50a and 50b of the waterway formwork unit 80 closes the upper surface of the groove 5. Next, the construction vehicle 20 is moved along the groove 5. As a result, as shown in Figures 1(a) and (b), the reinforcing bar holder 32 hooks onto the top of the reinforcing bar 6 and holds it in a hollow state, the waterway forming molds 56a and 56b are inserted without contacting the inside of the reinforcing bar 6, and the drainage opening forming molds 54a and 54b are positioned without contacting the gap at the top of the reinforcing bar 6.

[0024] Around the same time, a concrete supply vehicle supplies ready-mixed concrete with a predetermined slump value to the supply section 40 of the waterway formwork unit 80. The supplied ready-mixed concrete falls from above the supply section 40 and fills the groove 5 below. At this time, a vibration device 30 installed between the first and second waterway forming molds 56a and 56b applies high-frequency internal vibrations to the supplied ready-mixed concrete. These high-frequency internal vibrations liquefy the mortar components and fine aggregates in the ready-mixed concrete, filling the voids in the coarse aggregates and increasing density, while also embedding the reinforcing bars 6 and uniformly filling the area enclosed by the groove 5 and the upper formwork 50a and 50b, the waterway forming molds 56a and 56b, and the drainage outlet forming molds 54a and 54b.

[0025] Then, while maintaining this state, the construction vehicle 20 travels slowly along the road surface 3, moving the water channel formwork unit 80 along the groove 5. As a result, the areas where the water channel forming molds 56a and 56b are located are cut out, and a tubular water channel 12 is continuously formed. Also, the areas where the drain outlet forming molds 54a and 54b are located are cut out, and drain outlets 14 into the water channel 12 are continuously formed. As a result, a side ditch 16 with a water channel 12 inside and a drain outlet 14 at the top, as shown in Figure 3(c), is continuously formed within the groove 5, and this side ditch 16 is continuously discharged from the rear of the water channel formwork unit 80 as the construction vehicle 20 moves.

[0026] As described above, the water channel formwork unit 80 according to the present invention has drainage outlet forming molds 54a, 54b and water channel forming molds 56a, 56b hanging down from the upper formwork 50a, 50b, and does not have side walls. The upper formwork 50a, 50b closes the upper opening of the groove 5 formed by excavation, etc., and concrete is filled into this groove 5. For this reason, a side ditch 16 having a tubular water channel 12 can be continuously constructed within a narrow groove 5 that is approximately the same width as the side ditch 16.

[0027] Furthermore, in the waterway formwork unit 80 according to the present invention, the vibrating device 30 protrudes from the rear end of the first waterway forming mold 56a and is positioned below the supply section 40 between it and the second waterway forming mold 56b. In addition, the transmission member 34 that transmits power to the vibrating device 30 passes through a through hole 58 in the first waterway forming mold 56a. As a result, the vibrating device 30 can be installed horizontally below the supply section 40, eliminating the risk of contact with the reinforcing bars 6, and the most vibrating part of the vibrating device 30 can be positioned in the central part of the groove 5 (formwork section). This allows the capacity and vibration effect of the vibrating device 30 to be maximized within the formwork section, and the supplied concrete can be vibrated extremely efficiently compared to when the installation direction is vertical.

[0028] Furthermore, since the transmission member 34 passes through the through-hole 58 in the first water channel forming mold 56a, the transmission member 34 does not come into contact with the concrete, and the transmission member 34 does not obstruct the flow of concrete in the supply section 40 and the formwork section. In addition, no wear occurs due to friction with the concrete. Moreover, cleaning the formwork section is easier, and the amount of concrete remaining in the formwork section can be reduced.

[0029] Furthermore, the configuration, dimensions, and operation of each part of the waterway formwork unit 80 shown in this example are merely examples and are not limited to the above example. The present invention can be modified and implemented without departing from the spirit of the invention. [Explanation of symbols]

[0030] 5 grooves 12 waterways 16. Side ditch 20 Construction Vehicles 30 Vibration device 34 Transmission member 40 Supply section 50a First upper formwork 50b Second upper formwork 54a First drain outlet forming type 54b Second drain outlet forming type 56a First channel-forming type 56b Second channel-forming type 58 Through hole 80 Waterway Formwork Unit

Claims

[Claim 1] A formwork unit for a drainage channel, which is fixed to a drivable construction vehicle and moves together with the construction vehicle, and fills a trench formed by excavation in the surface of an already completed road with concrete to construct a side ditch having a tubular waterway, The system comprises a formwork section for constructing the aforementioned side ditch, and a supply section for supplying concrete to the formwork section, The formwork section does not have side walls, A first upper formwork that closes the upper surface of the groove and is located in front of the supply unit, A second upper formwork that closes the upper surface of the groove and is located on the rear side of the supply unit, A first drain outlet forming mold hanging down from the first upper formwork, A second drainage outlet forming mold hanging down from the second upper formwork, A substantially cylindrical first channel forming mold fixed to the lower end of the first drain outlet forming mold, A substantially cylindrical second channel forming mold is fixed to the lower end of the second drain outlet forming mold, A vibration device located below the supply section that vibrates the supplied concrete, The device includes a transmission member that transmits power to the aforementioned vibrator, The first channel forming mold is provided with through holes in the axial direction, The transmission member passes through the through hole, and the vibration device protrudes from the rear end of the first water channel forming mold and is located within the supply section. Furthermore, the water channel formwork unit is characterized in that the vibrating device is located between the rear end surface of the first water channel forming mold and the front end surface of the second water channel forming mold, is provided to protrude rearward from the rear end of the first water channel forming mold so that its tip does not come into contact with the second water channel forming mold, has a smaller diameter than the first and second water channel forming molds, fits within a region that does not protrude from the circumferential surfaces of the first and second water channel forming molds when viewed from the axial direction of the first and second water channel forming molds, and is fixed at an angle that is diagonally downward, offset from the axes of the first and second water channel forming molds.

Images