Monitoring method of concrete filling

Abstract

To provide a monitoring method of concrete filling that enables an imaging apparatus to be easily inserted into a steel pipe column having an inclination and enables a status of concrete filling inside the steel pipe column to be monitored using the imaging apparatus.SOLUTION: The monitoring method of concrete filling when concrete 6 is pressed into a steel pipe column 1 having an inclination spanning one or more layers to fill it, executes the steps of: attaching a photographing device 5 provided with a photographing part at a tip of a cable continuing from the outside of the steel pipe column 1 to a wire 4 inserted into a section including an inclined portion within the steel pipe column 1 between an upper press-in port 11a and a lower press-in port 11b of the steel pipe column 1, and lowering the photographing part within the steel pipe column 1 by pulling the wire 4 from the press-in port 11b; removing the wire 4 from the steel pipe column 1; and photographing a top end of the concrete 6 rising within the steel pipe column 1 by the photographing part.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a method for monitoring the filling of concrete. [Background technology]

[0002] A CFT column (concrete-filled steel tubular column) is a column component formed by filling a steel tubular column with concrete. A known method for filling a steel tubular column with concrete is the press-in method. This involves pressing the concrete into a press-in port on the side of the steel tubular column, filling the column from bottom to top.

[0003] Plate materials such as diaphragms and shape-retaining plates are installed inside steel pipe columns for reinforcement. Diaphragms are placed inside the steel pipe columns in the panel zones that connect the steel pipe columns to steel beams. Shape-retaining plates are placed inside the steel pipe columns between the upper and lower panel zones. The planar shapes of the diaphragms and shape-retaining plates roughly correspond to the cross-sectional shapes inside the steel pipe columns, and a filling hole is provided in the center of the planar area to allow the pressed concrete to flow.

[0004] When concrete is being filled, it is important to monitor the filling status and confirm whether the concrete is sufficiently filled inside the steel pipe column. Concrete filling monitoring is usually done by photographing the top of the concrete using a camera suspended vertically downward inside the steel pipe column. The camera is placed through a filling hole in the diaphragm or shape retention plate and is raised as the top of the concrete rises.

[0005] Patent document 1 describes that when concrete is filled into a steel pipe column, an industrial endoscope is inserted through an opening on the side of the steel pipe column to photograph the top of the concrete and monitor the concrete filling status. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7445547 Summary of the Invention [Problem to be solved by the invention]

[0007] When a steel pipe pole is tilted relative to the vertical, simply hanging the imaging device vertically down inside the steel pipe pole can cause the imaging device to come into contact with the side of the steel pipe pole from the inside, making it difficult to insert the imaging device. Also, the planar positions of the filling holes in the diaphragm and shape-retaining plate do not match when viewed from above, which can also be an obstacle when hanging the imaging device down inside the steel pipe pole.

[0008] In this regard, Patent Document 1 uses an industrial endoscope as an imaging device, and by using a flexible coiled guide tube as a guide when inserting the industrial endoscope into a steel pipe pole, it is possible to insert the imaging device into a steel pipe pole with an inclination. However, it is time-consuming to insert the guide tube into the steel pipe pole, and there are also limitations on the length of the guide tube due to factors such as strength, weight, and operability.

[0009] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a concrete filling monitoring method that allows a photographing device to be easily inserted into a sloping steel pipe pole and that can monitor the concrete filling status inside the steel pipe pole using the photographing device. [Means for solving the problem]

[0010] The first invention for solving the above-mentioned problems is a method for monitoring concrete filling when it is pressed into a steel pipe pole having a slope spanning one or more layers to fill it, the method comprising the steps of: attaching a photographing device having a photographing unit at the end of a cable continuing from the outside of the steel pipe pole to a wire inserted into a section including a slope within the steel pipe pole between a first opening on the upper side of the steel pipe pole and a second opening on the side of the lower side of the steel pipe pole; and lowering the photographing unit within the steel pipe pole by pulling the wire from the second opening; removing the wire from the steel pipe pole; and photographing the top of the concrete rising within the steel pipe pole with the photographing unit.

[0011] In the first invention, a wire is passed through the upper and lower openings of a steel pipe pole in advance, and a camera is attached to the wire. The wire is then pulled from below, allowing the camera portion of the camera to be lowered inside the steel pipe pole using the wire as a guide. This allows the camera to be easily inserted into a sloping steel pipe pole in a short time. Furthermore, the camera can be easily set up even when a diaphragm or shape-retaining plate with a filling hole is present inside the steel pipe pole.

[0012] It is desirable that, before step (a), the wire rod is suspended from the first opening into the steel pipe pole, the lower end of the wire rod is pulled out from the second opening, and the wire rod is arranged in a state where the upper and lower ends thereof protrude from the first opening and the second opening of the steel pipe pole, and while the wire rod is suspended, a guide member is inserted into the steel pipe pole through an insertion hole, separate from the first opening and the second opening, provided on the side of the steel pipe pole, and the guide member is used to move the wire rod in the steel pipe pole toward the side of the steel pipe pole, thereby adjusting the planar position of the wire rod. As a preliminary step, the wire is passed through the steel pipe column in advance. At this time, a guide member is inserted into the steel pipe column through an insertion hole on the side of the steel pipe column, and the planar position of the wire is adjusted. This allows the wire to be easily inserted even when the steel pipe column is inclined or when a diaphragm or shape-retaining plate with a filling hole is present inside the steel pipe column.

[0013] It is desirable that the wire be suspended within the steel pipe column with the photographing device attached so that the photographing unit is positioned above the lower end of the wire, and that the photographing unit photograph the lower end of the wire as it is suspended, and after the lower end of the wire is brought out of the second opening, the photographing unit be pulled up and removed from the first opening. This allows the position of the lower end of the wire to be photographed and confirmed by the photographing unit, making it easier to adjust the position of the wire.

[0014] It is also desirable that a weight be provided at the lower end of the wire. This prevents the wire from loosening when hanging down inside the steel pipe pole, and allows the wire to be easily inserted into the steel pipe pole.

[0015] The guide member is preferably a linear steel member having a bent portion. Such a guide member has excellent operability and strength when inserting it into a steel pipe column through an insertion hole on the side of the steel pipe column or when adjusting the planar position of the wire rod.

[0016] The imaging device may be a tip-moving endoscope in which the orientation of the imaging section is variable. This allows the orientation of the imaging unit to be changed, allowing the desired range to be photographed, making it convenient for monitoring the filling of concrete inside an inclined steel pipe pole, and it can photograph an area with few blind spots even when there are obstacles such as diaphragms, shape-retaining plates, etc. In addition, because the imaging unit of the endoscope has a small diameter, roughly the same as that of the cable, it is possible to prevent the imaging device from getting caught on obstacles inside the steel pipe pole, such as diaphragms or shape-retaining plates, when pulling up the imaging device.

[0017] The second invention is a method for monitoring concrete filling when concrete is pressed into a steel pipe pole having a slope spanning one or more layers, the method comprising the steps of: attaching a photographing device having a photographing unit at the tip of a cable continuing from the outside of the steel pipe pole to a wire; lowering the photographing unit within the steel pipe pole by hanging the wire pole from a first opening on the upper side of the steel pipe pole into the steel pipe pole; and bringing out the lower end of the wire pole from a second opening on the side surface of the lower side of the steel pipe pole; removing the wire pole from the steel pipe pole; and raising the wire pole within the steel pipe pole. and step (c) of photographing the top end of the concrete being filled with the wire using the photographing unit, wherein when the wire is hanging down in step (a'), the lower end of the wire is photographed by the photographing unit located above the lower end of the wire, a guide member is inserted into the steel pipe column through an insertion hole provided on the side of the steel pipe column, separate from the first opening and the second opening, and the guide member is used to move the wire inside the steel pipe column toward the side of the steel pipe column, and adjust the planar position of the wire. In the second invention, the camera attached to the wire is not removed when inserting the wire, but is used for monitoring filling. When inserting the wire, the camera photographs the lower end of the wire and the guide member adjusts the position of the wire, making it possible to easily insert the wire and camera into the steel pipe even when the steel pipe is tilted or when a diaphragm or shape-retaining plate with a filling hole is present inside the steel pipe. [Effects of the Invention]

[0018] The present invention provides a method for monitoring concrete filling, which allows a camera to be easily inserted into a sloping steel pipe pole and enables the camera to be used to monitor the concrete filling status inside the steel pipe pole. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a diagram showing a portion of a steel pipe column 1. [Figure 2] 4A to 4C are diagrams illustrating a process of inserting a wire 4. [Figure 3] FIG. 3 is a diagram showing an example of a guide member 8. [Figure 4] 4A to 4C are diagrams illustrating a process of inserting a wire 4. [Figure 5] FIG. 10 is a diagram showing a state in which the photographing device 5 has been removed. [Figure 6] 10A to 10C are diagrams illustrating a process of inserting the imaging device 5. [Figure 7] 10A to 10C are diagrams illustrating a process of inserting the imaging device 5. [Figure 8] 10A to 10C are diagrams illustrating a process of inserting the imaging device 5. [Figure 9] FIG. 10 is a diagram showing a state in which the photographing device 5 is set at the filling monitoring start position. [Figure 10] 10A and 10B are diagrams illustrating a process of monitoring filling of concrete 6 using a photographing device 5. FIG. [Figure 11] FIG. [Figure 12] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0021] (1. Steel pipe column 1) The filling monitoring method of the present invention monitors the filling status of concrete inside a steel pipe pole when concrete is pressed into the inside of the steel pipe pole having a slope over one or more layers.

[0022] FIG. 1 is a diagram showing a part of this steel pipe pole 1, showing a vertical cross section of the steel pipe pole 1. The steel pipe pole 1 is a column member formed from a steel pipe. In this embodiment, the steel pipe is a square steel pipe, and its cross section is rectangular. However, a circular steel pipe can also be used.

[0023] The steel pipe column 1 is a diagonal column of the building, and a beam 2 is connected to its side. The beam 2 is a steel beam made of H-shaped steel. The beams 2 are arranged in multiple layers, spaced apart from one another. The area between the upper and lower beams 2 may be referred to as a layer below. Each beam 2 supports the floor (not shown) of each layer of the building. The steel pipe column 1 in Figure 1 has a slope that spans multiple layers of the building, but there are also cases where the slope is only as high as one layer of the building.

[0024] In the panel zone (connection) connecting the steel pipe column 1 and the beam 2, a diaphragm 3 is provided inside the steel pipe column 1. In the example of Figure 1, two diaphragms 3 are provided at heights corresponding to the upper and lower flanges of the beam 2, but three or more diaphragms 3 may be provided when the beam depths of multiple beams 2 attached to the panel zone are different or when braces are attached.

[0025] The diaphragm 3 is a plate-like reinforcing member made of a steel plate or the like. The planar shape of the diaphragm 3 corresponds to the internal cross-sectional shape of the steel pipe column 1, and a filling hole 31 is provided in the center of the plane of the diaphragm 3 to allow the concrete 6 pressed into the steel pipe column 1 to flow.

[0026] Between the upper and lower panel zones of the steel pipe column 1, a shape retention plate 9 for retaining the shape of the steel pipe column 1 is provided. The shape retention plate 9 is also a plate-like reinforcing member formed from a steel plate or the like, and its planar shape approximately corresponds to the internal cross-sectional shape of the steel pipe column 1. A filling hole 91 is provided in the center of the plane of the shape retention plate 9 for circulating the concrete 6 pressed into the steel pipe column 1. One or more shape retention plates 9 are provided in the axial direction of the steel pipe column 1 between the upper and lower panel zones.

[0027] Openings such as pressure inlets 11 and steam vent holes 12 are provided at intervals above and below on the side surfaces of the steel pipe column 1. It should be noted that there are no particular limitations on which side surfaces of the steel pipe column 1 these openings are provided on, and this differs depending on the floor of the building.

[0028] The injection port 11 is an opening for filling the concrete 6 by a press-in method. The injection port 11 is provided above the panel zone. There is no particular limitation on the height from the panel zone to the injection port 11 directly above it.

[0029] The steam vent holes 12 are openings for releasing steam generated from the concrete 6 inside the steel pipe column 1 in the event of a fire. The steam vent holes 12 are generally provided on the side of the steel pipe column 1 at the top and bottom of each floor of the building. When filling the steel pipe column 1 with concrete 6, the steam vent holes 12 are blocked with plugs 121. The plugs 121 are removed after the filled concrete 6 has hardened. Note that the plugs 121 may be made of a material that dissolves in the event of a fire and may be left in place.

[0030] (2. Filling monitoring method) The filling monitoring method of the present invention will be described by taking as an example a case where, as shown in Figure 1, concrete 6 has already been filled up to the height of the panel zone of the lower layer of a building, and concrete 6 is injected from an injection port 11b located slightly above the panel zone to newly fill concrete 6 up to the height of the panel zone of the upper layer. However, the application of the filling monitoring method of the present invention is not limited to this. For example, the same procedure would be followed if concrete 6 has not yet been filled in the steel pipe column 1 and filling of concrete 6 begins from the bottom layer of the steel pipe column 1.

[0031] The filling range of the newly filled concrete 6 may be one story of the building or multiple stories. In addition, it is not necessary for all of the steel pipe columns 1 for the multiple stories to be inclined, and the steel pipe columns 1 may be inclined only in some of the stories. In any case, it is sufficient that there are inclined parts of the steel pipe columns 1 within the filling range of the concrete 6.

[0032] In this embodiment, before concrete 6 is newly filled, for example, the day before concrete 6 is filled, wire 4 is inserted between upper press-in port 11a (first opening) located slightly above the upper panel zone and lower press-in port 11b (second opening). Wire 4 is, for example, a rope or climbing rope, and is unlikely to be worn down by contact with steel pipe column 1, diaphragm 3, shape retention plate 9, etc., and is unlikely to break. Note that wire 4 can also be inserted between press-in port 11, which is located higher than press-in port 11a, and lower press-in port 11b. In this case, however, a camera device 5 with a long cable length, as described below, is required.

[0033] When inserting the wire 4 into the steel pipe pole 1, first, a weight 7 is attached to the tip of the wire 4, and the photographing unit 51 of the photographing device 5 is attached to the wire 4 at a distance (for example, about 500 mm) from the tip of the wire 4. The photographing device 5 is an industrial endoscope in which the photographing unit 51 is provided at the tip of a cable 52 that continues from a computer (not shown) or the like outside the steel pipe pole 1. In particular, in this embodiment, a movable-tip endoscope is used in which the tip of the cable 52 is movable and the orientation of the photographing unit 51 is variable.

[0034] Thereafter, the wire 4, to which the weight 7 and the camera 5 are attached, is suspended from the upper press-in port 11a into the steel pipe column 1. The weight of the weight 7 is determined so that the wire 4 does not slacken when suspended (for example, 150 to 250 g). The size of the weight 7 is determined so that it can easily pass through the filling holes 31 and 91 of the diaphragm 3 and the shape-retaining plate 9; for example, the maximum width of the weight 7 is set to 1 / 5 or less of the diameter of the filling holes 31 and 91. The shape of the weight 7 is preferably a streamlined shape with few irregularities to allow it to easily pass through the filling holes 31 and 91. The weight 7 and the camera 51 are firmly attached to the wire 4 so that they will not come off even if they get caught on the diaphragm 3 or the shape-retaining plate 9 while the wire 4 is suspended.

[0035] The photographing section 51 of the photographing device 5 descends inside the steel pipe column 1 as the wire rod 4 hangs down. While the wire rod 4 is hanging down, the photographing section 51 photographs the lower end of the wire rod 4, and the image is displayed on a computer monitor or the like to confirm the position of the lower end of the wire rod 4. If it is found that the weight 7 at the lower end of the wire rod 4 abuts against the side surface of the steel pipe column 1 or is out of the planar position of the filling holes 31, 91 of the diaphragm 3 or the shape retention plate 9, as shown in Figure 2, a guide member 8 is inserted through the steam vent hole 12a (insertion hole) on the side surface of the steel pipe column 1, and the planar position of the wire rod 4 is adjusted using the guide member 8.

[0036] 3 is a diagram showing an example of guide member 8. Guide member 8 is produced by bending a small-diameter steel material having a diameter of about 3 to 5 mm. A stepped bent portion 81 is provided in the middle of guide member 8, where the steel material is bent outward in steps, and a hook-shaped bent portion 82 is provided at the tip of guide member 8, where the end of stepped bent portion 81 is bent into a hook shape.

[0037] The guide member 8 is inserted into the steel pipe column 1 through the steam vent hole 12a, and while checking the image captured by the photographing unit 51, the hook-shaped bent portion 82 of the guide member 8 is hooked onto the wire rod 4, and the wire rod 4 is pulled and moved toward the side of the steel pipe column 1, thereby adjusting the planar position of the wire rod 4 as shown in Fig. 2. In the example of Fig. 2, the wire rod 4 between the weight 7 and the photographing unit 51 is hooked by the guide member 8, but the location where the position of the wire rod 4 is adjusted is not limited to this.

[0038] In this way, the wire 4 is further lowered within the steel pipe column 1 while adjusting the planar position of the wire 4 while photographing the lower end of the wire 4 with the photographing unit 51, and the lower end of the wire 4 and the photographing unit 51 of the photographing device 5 are pulled out from the lower press-in port 11b to the outside of the steel pipe column 1, as shown in Figure 4. Then, the photographing unit 51 is detached from the wire 4, and only the photographing device 5 is pulled up through the upper press-in port 11a and removed from within the steel pipe column 1.

[0039] 5, the wire rod 4 is inserted into the section between the upper press-in hole 11a and the lower press-in hole 11b of the steel pipe column 1, and the upper and lower ends of the wire rod 4 protrude out from the upper and lower press-in holes 11a, 11b. It is preferable that the wire rod 4 on the outside of the upper press-in hole 11a is bundled together on the outside of the steel pipe column 1, and the wire rod 4 on the outside of the lower press-in hole 11b is temporarily fixed on the outside of the steel pipe column 1.

[0040] The length of the wire 4 is at least twice the length L along the axial direction of the steel pipe column 1 between the upper and lower injection ports 11a, 11b (substantially equal to the length along the axial direction of the steel pipe column 1 in the filling range of the newly filled concrete 6), and the wire 4 is left protruding outside the upper injection port 11a by a length at least equal to the above-mentioned length L. The length of the cable 52 of the camera device 5 is at least equal to the above-mentioned length L.

[0041] In this embodiment, the above procedure completes the advance preparation for newly filling the concrete 6. It is desirable to carry out the above procedure in advance for the number of steel pipe columns 1 to be newly filled with concrete 6. This allows the work time required for newly filling the concrete 6 to be reduced.

[0042] When newly filling the concrete 6, first, as shown in Fig. 6, the photographing section 51 of the photographing device 5 is attached again to the wire 4 outside the upper press-in hole 11a of the steel pipe column 1. Then, the wire 4 is pulled from the lower press-in hole 11b to pull the photographing device 5 into the steel pipe column 1, and as shown in Fig. 7, the photographing section 51 of the photographing device 5 is lowered inside the steel pipe column 1 using the wire 4 as a guide. At this time, the upper end of the wire 4 is secured outside the upper press-in hole 11a of the steel pipe column 1 to prevent all of the wire 4 from falling into the steel pipe column 1.

[0043] When the wire 4 is pulled in this state, the photographing section 51 of the photographing device 5 comes out from the lower injection port 11b as shown in Figure 8, so the photographing section 51 is detached from the wire 4 outside the steel pipe column 1, and only the wire 4 is pulled up from the upper injection port 11a and removed from inside the steel pipe column 1. This is to prevent the wire 4 from interfering with the injection of the concrete 6. The wire 4 may also be removed from inside the steel pipe column 1 by pulling it from the lower injection port 11b.

[0044] Then, as shown in Figure 9, the camera unit 51 of the camera device 5 is returned to the steel pipe column 1 by, for example, pulling the cable 52 from the upper pressure inlet 11a, and the height of the camera unit 51 is fine-tuned to set it at the filling monitoring start position.

[0045] Then, concrete 6 begins to be injected into the steel pipe column 1 from the lower injection port 11b. While the concrete 6 is being injected, as shown in Fig. 10, a cable 52 is pulled from the upper injection port 11a, and the photographing unit 51 is raised within the steel pipe column 1 in accordance with the injection speed of the concrete 6, while the top of the concrete 6 rising within the steel pipe column 1 is photographed by the photographing unit 51, and the image is displayed on a computer monitor or the like to check the filling status. The concrete 6 is filled up to the height of the panel zone directly below the upper injection port 11a. However, the filling height of the concrete 6 is not limited to this.

[0046] In this embodiment, the imaging device 5 is a tip-moving endoscope, and even if the imaging section 51 is positioned eccentrically within the inclined steel pipe column 1 and the planar position of the imaging section 51 is not directly above the filling holes 31, 91 of the diaphragm 3 or the shape-retaining plate 9, it is possible to photograph the desired range near the filling holes 31, 91 by adjusting the orientation of the imaging section 51. Furthermore, the diameter of the imaging section 51 of the imaging device 5, which is an industrial endoscope, is only about 1 to 10 mm larger than the diameter of the cable 52, so that the diameters are approximately the same. Therefore, when the imaging section 51 is pulled up, the imaging section 51 will not get caught on the opening edges of the filling holes 31, 91 of the diaphragm 3 or the shape-retaining plate 9.

[0047] As described above, in this embodiment, the wire 4 is passed in advance between the upper and lower press-in ports 11a, 11b of the steel pipe pole 1, and the photographing device 5 is attached to the wire 4. By pulling the wire 4 from below, the photographing section 51 of the photographing device 5 can be lowered within the steel pipe pole 1 using the wire 4 as a guide. This allows the photographing device 5 to be easily inserted into the inclined steel pipe pole 1 in a short time. Furthermore, even if a diaphragm 3 or a shape-retaining plate 9 having filling holes 31, 91 is present within the steel pipe pole 1, the photographing device 5 can be easily set. As a result, the waiting time before press-in is shortened and the risk of hardening of the ready-mixed concrete is reduced, thereby also reducing the risk of pipe blockage due to the concrete 6 being pumped and of insufficient filling of the steel pipe pole 1.

[0048] The wire 4 is passed through the steel pipe pole 1 in advance as a preparation for filling with concrete. At this time, the planar position of the wire 4 is adjusted using a guide member 8 inserted into the steel pipe pole 1 through the steam vent hole 12a on the side of the steel pipe pole 1, so that the wire 4 can be easily inserted into the steel pipe pole 1 even when the steel pipe pole 1 is inclined or when a diaphragm 3 or a shape retention plate 9 having filling holes 31, 91 is present inside the steel pipe pole 1. The guide member 8 is a linear steel member with a bent portion, and is easy to operate and has excellent strength when inserting it into the steel pipe pole 1 through the steam vent hole 12a or when adjusting the planar position of the wire 4.

[0049] In this embodiment, the position of the lower end of the wire rod 4 can be photographed and confirmed by the photographing unit 51, facilitating position adjustment when inserting the wire rod 4. In addition, a weight 7 is provided at the lower end of the wire rod 4 to prevent the wire rod 4 from loosening inside the steel pipe pole 1, and the wire rod 4 can be easily inserted into the steel pipe pole 1.

[0050] Furthermore, in this embodiment, by using a movable-tip endoscope as the imaging device 5, the orientation of the imaging section 51 can be changed and the desired range can be imaged, which is convenient for monitoring the filling of concrete 6 inside an inclined steel pipe column 1, and even when obstacles such as a diaphragm 3 or shape-retaining plate 9 are present, it is possible to image an area with few blind spots. Furthermore, since the imaging section 51 of the endoscope has a small diameter and is approximately the same diameter as the cable 52, it is possible to prevent the imaging section 51 from getting caught on obstacles inside the steel pipe column 1, such as the diaphragm 3 or shape-retaining plate 9, when pulling up the imaging section 51. A movable-tip endoscope is particularly suitable when the inclination of the steel pipe column 1 is steep.

[0051] However, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the length of the wire 4 is set to at least twice the length L between the upper and lower press-in ports 11a, 11b of the steel pipe pole 1, but the length of the wire 4 is not limited to this. For example, as shown in FIG. 11 , the length of the wire 4 may be set to be slightly longer than the above-described length L, and when the photographing unit 51 of the photographing device 5 is lowered inside the steel pipe pole 1, the photographing unit 51 may be attached to the upper end of the wire 4 and the wire 4 may be pulled from the lower press-in port 11b. However, this method requires careful work because a tensile force may be applied to the cable 52 of the photographing device 5, which may cause a breakage or the like.

[0052] In this embodiment, a movable-tip endoscope is used as the imaging device 5, but an industrial endoscope without a movable tip may also be used. In some cases, such as when the steel pipe pole 1 has a gentle slope, a conventional vertical pole filling monitoring camera may also be used. In the example of FIG. 12, a conventional vertical pole filling monitoring camera, such as a 360-degree camera or a fisheye lens, is used as the imaging unit 51a of the imaging device 5a. A spherical camera may also be used as the imaging unit 51a. In these cases, since the imaging unit 51a becomes large, it is desirable to provide wheels 511 on the imaging unit 51a so that the imaging unit 51a does not get caught on the opening edges of the filling holes 31 and 91 in the diaphragm 3 or the shape-retaining plate 9 when the imaging unit 51a is pulled up.

[0053] In addition, if the inclination of the steel pipe column 1 is gentle, the use of the guide member 8 and the weight 7 is not essential.

[0054] Furthermore, in this embodiment, after the wire 4 is inserted between the upper and lower press-in ports 11a, 11b of the steel pipe pole 1, the camera device 5 inserted into the steel pipe pole 1 together with the wire 4 is temporarily removed. This allows the removed camera device 5 to be reused in another location and also prevents theft of the camera device 5. However, if such a need does not exist, the camera device 5 inserted into the steel pipe pole 1 together with the wire 4 in the steps up to Fig. 4 may be left in place and used to monitor the filling of the concrete 6. When newly filling the concrete 6, the step of inserting the camera device 5 described in Figs. 6 and 7 can be omitted, and the work can be started from the step shown in Fig. 8.

[0055] In this case too, when inserting the wire 4 and the photographing device 5, the lower end of the wire 4 is photographed with the photographing section 51 and the position of the wire 4 is adjusted with the guide member 8, so that the wire 4 and the photographing device 5 can be easily inserted into the steel pipe column 1 even when the steel pipe column 1 is inclined or when a diaphragm 3 or a shape retention plate 9 having filling holes 31, 91 is present in the steel pipe column 1.

[0056] Furthermore, in this embodiment, the wire rod 4 and the photographing device 5 are inserted into the steel pipe column 1 through the press-in opening 11a on the side surface of the steel pipe column 1, but this is not limited to this, and the wire rod 4 and the photographing device 5 may also be inserted into the steel pipe column 1 through an opening in the column capital of the steel pipe column 1. Alternatively, an opening for inserting the wire rod 4 and the photographing device 5 may be provided on the side surface of the steel pipe column 1 separately from the press-in opening 11 and the steam vent hole 12, and the wire rod 4 and the photographing device 5 may be inserted into the steel pipe column 1 through this opening. The same applies to the lower opening for pulling out the wire rod 4 and the photographing device 5 and the insertion hole of the guide member 8.

[0057] In the example of FIG. 2 , the guide member 8 is inserted into the steel pipe pole 1 from the steam vent hole 12a on the right side surface of the steel pipe pole 1, and the wire rod 4 is hooked by the hook-shaped bending portion 82 of the guide member 8 to pull the wire rod 4 toward the right side surface. However, the guide member 8 may be inserted into the steel pipe pole 1 from the steam vent hole 12b on the left side surface of the steel pipe pole 1, and the wire rod 4 may be pushed out toward the right side surface of the steel pipe pole 1 by the hook-shaped bending portion 82 of the guide member 8, thereby adjusting the planar position of the wire rod 4. In addition, if an opening such as a steam vent hole 12 is provided on a side surface of the steel pipe pole 1 that is perpendicular to the left and right side surfaces of the steel pipe pole 1 in FIG. 2 , the planar position of the wire rod 4 may be adjusted by pushing the wire rod 4 toward the right side surface of the steel pipe pole 1 with the stepped bending portion 81 of the guide member 8 inserted into the opening. Furthermore, the shape and material of the guide member 8 are not limited to those described above, and any material may be used as long as the guide member 8 can be inserted into the steel pipe pole 1 from an opening on the side surface of the steel pipe pole 1 and the position of the wire rod 4 can be adjusted.

[0058] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention. [Explanation of symbols]

[0059] 1: Steel pipe column 2: Beam 3: Diaphragm 4: Wire rod 5, 5a: Imaging device 6: Concrete 7: Weight 8: Guide member 9: Shape retention plate 11, 11a, 11b: Pressure inlet 12, 12a, 12b: Steam vent holes 31, 91: Filling hole 51, 51a: Photography department 52: Cable 81: Stepped bend 82: Hook-shaped bent part

Claims

1. A method for monitoring concrete filling when concrete is pressed into a steel pipe column having a slope over one or more layers, A step (a) of attaching a photographing device having a photographing unit at the tip of a cable continuing from the outside of the steel pipe pole to a wire rod inserted into a section including an inclined portion within the steel pipe pole between a first opening on the upper side of the steel pipe pole and a second opening on a side surface of the lower side of the steel pipe pole, and lowering the photographing unit within the steel pipe pole by pulling the wire rod from the second opening; (b) removing the wire rod from the steel pipe column; A step (c) of photographing the top end of the concrete rising inside the steel pipe column with the photographing unit; A method for monitoring concrete filling, comprising:

2. Before the step (a), the wire rod is suspended from the first opening into the steel pipe pole, and the lower end of the wire rod is extended from the second opening, and the wire rod is arranged in a state where the upper and lower ends extend from the first opening and the second opening of the steel pipe pole, A method for monitoring concrete filling as described in claim 1, characterized in that when the wire is hanging down, a guide member is inserted into the steel pipe column through an insertion hole provided on the side of the steel pipe column, separate from the first opening and the second opening, and the guide member is used to move the wire inside the steel pipe column toward the side of the steel pipe column, thereby adjusting the planar position of the wire.

3. The wire is suspended within the steel pipe column with the photographing device attached so that the photographing unit is positioned above the lower end of the wire, the photographing unit photographs a lower end of the wire rod when the wire rod is hanging down, 3. The method for monitoring concrete filling according to claim 2, wherein after the lower end of the wire is pulled out from the second opening, the photographing unit is pulled up and removed from the first opening.

4. 3. The method for monitoring concrete filling according to claim 2, wherein a weight is provided at the lower end of the wire.

5. 3. The method for monitoring concrete filling according to claim 2, wherein the guide member is a linear steel member having a bent portion.

6. 2. The method for monitoring concrete filling according to claim 1, wherein the photographing device is a tip-moving endoscope in which the direction of the photographing section is variable.

7. A method for monitoring concrete filling when concrete is pressed into a steel pipe column having a slope over one or more layers, A process (a') of attaching a photographing device having a photographing unit at the tip of a cable continuing from the outside of the steel pipe pole to a wire rod, and hanging the wire rod from a first opening on the upper side of the steel pipe pole into the steel pipe pole to lower the photographing unit within the steel pipe pole, and bringing the lower end of the wire rod out from a second opening on the lower side of the steel pipe pole; (b) removing the wire rod from the steel pipe column; A step (c) of photographing the top end of the concrete rising inside the steel pipe column with the photographing unit; and When the wire rod is suspended in the step (a'), an image of the lower end of the wire rod is captured by the image capturing unit located above the lower end of the wire rod; A method for monitoring concrete filling, characterized in that a guide member is inserted into the steel pipe column through an insertion hole provided on the side of the steel pipe column, separate from the first opening and the second opening, and the guide member is used to move the wire inside the steel pipe column toward the side of the steel pipe column, thereby adjusting the planar position of the wire.

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