JP6231866B2 - Imaging device in steel pipe sheet pile joint - Google Patents

Description

  The present invention relates to an imaging device in a steel pipe sheet pile joint, and particularly to an apparatus for confirming the state (soundness) of a waterproof member disposed in a steel pipe sheet pile joint.

  A steel pipe sheet pile is a member used when constructing a water stop wall by attaching a joint to the outer periphery of a steel pipe and connecting the joints of adjacent steel pipe sheet piles. Specifically, it is used when building quay walls, revetments, wave breakwaters in rivers and rivers, earth retaining in urban civil engineering, deadlines, and steel pipe sheet pile foundations in bridges. There are various types of joints for steel pipe sheet piles, such as P-type, T-type, and L-type. For example, L-type and T-type, P-type and P-type, and P-type and T-type are adjacent to each other. By connecting sheet piles, water barriers such as earth retaining and deadlines are constructed.

  As described above, when the steel pipe sheet pile connects the joints of adjacent steel pipes to construct a water blocking wall or the like, it is necessary to ensure water blocking at the joint portion. For example, when a P-type joint and a T-type joint are combined, a waterproof member made of a rubber plate or the like is attached to the T-type joint, the waterproof member is brought into close contact with the inner surface of the P-type joint, and the inner surface of the P-type joint is waterproofed. Mortar is injected into the space surrounded by the members to ensure water stopping.

  However, if there is a gap between the inner surface of the P-type joint and the waterproofing member, it may not be possible to ensure complete water-stopping. Check the state of the waterproofing member placed inside the joint before mortar injection There is a need to. At this time, the joint is generally filled with turbid water (for example, bentonite mud that could not be removed by washing in the pipe or turbid water infiltrated from the ground). You can't shoot the situation. Then, the apparatus for imaging | photography the inside of the coupling of the steel pipe sheet pile filled with muddy water is disclosed (for example, refer patent document 1).

  The in-pipe imaging device described in Patent Document 1 includes a borehole camera for imaging the inside of the tube, and a capsule that includes the borehole camera in a watertight manner and has a transparent surface in the imaging direction. In this pipe imaging device, a transparent capsule containing the borehole camera in a watertight manner is inserted into the joint pipe to a predetermined depth, and muddy water (turbid water) filled in the joint pipe is removed by the width of the capsule to image the inside of the joint pipe. You can do that.

JP 2005-201717 A

  However, in the in-pipe imaging device described in Patent Document 1 described above, an electromagnet is attached to the borehole camera itself, and the electromagnet is operated to be attracted to the joint pipe. However, there is nothing about accurately controlling the shooting direction. Not mentioned. Therefore, the photographing direction in muddy water cannot be grasped.

  Moreover, since the capsule contains the borehole camera in a watertight manner, air exists in the capsule. Therefore, even if a weight is attached to the bottom of the capsule, it is difficult to say that the capsule can be reliably sunk in muddy water filled in the joint. In addition, when air is present in the capsule, there is no effect at shallow depths, but when the capsule is submerged to a deep depth, the capsule is subjected to water pressure, and the capsule cracks or turbid water enters the capsule. There is a risk of

  The borehole camera is connected to the tip of the cable and is inserted into the joint by drawing out the cable. However, a general cable has flexibility and bends during the insertion process. Is also possible. In this case, it is not possible to measure the exact position (insertion depth) of the borehole camera only by the cable feed amount.

  The present invention has been proposed in view of the above-described circumstances, and accurately grasps the insertion depth and shooting direction of the borehole camera and easily confirms the state (soundness) of the waterproof member disposed in the joint. It aims at providing the imaging device in the steel pipe sheet pile joint which can do. It is another object of the present invention to provide a photographing apparatus in a steel pipe sheet pile joint that can prevent damage to the housing and the borehole camera even when it contacts a projection in the steel pipe sheet pile joint. And

  The imaging device in the steel pipe sheet pile joint of the present invention has the following features in order to achieve the above-described object. That is, the imaging device in the steel pipe sheet pile joint of the present invention attaches a waterproof member to the joint of one steel pipe sheet pile when connecting adjacent steel pipe sheet piles, and one steel pipe sheet pile joint in the joint of the other steel pipe sheet pile. It is related with the imaging | photography device for confirming the state of the waterproof member attached to the coupling of one steel pipe sheet pile.

The photographing device in this steel pipe sheet pile joint is provided with a member having translucency at least in the photographing direction, and a cylindrical body that houses the borehole camera in a sealed manner, and extends from the borehole camera that is accommodated in the cylindrical body. A signal cable and a rod for supporting the signal cable. The rod is provided with a shooting direction instruction mark indicating the shooting direction of the borehole camera.

The state of the waterproof member is, for example, whether or not the waterproof member is in close contact with the inner surface of the joint of the other steel pipe sheet pile. In the present invention, the state of the waterproof member is limited to this. It is not what is meant, but it means what the waterproof member is in the joint inner surface of the other steel pipe sheet pile.

Moreover, it is preferable that the imaging | photography apparatus in the steel pipe sheet pile joint which consists of the said structure fills a cylindrical body with fresh water.

Moreover, it is preferable that the imaging | photography apparatus in the steel pipe sheet pile joint which consists of the said structure attaches a buffer member to the lower part of a cylindrical body.

  According to the imaging device in the steel pipe sheet pile joint of the present invention, the waterproof member is provided with the display mark having a contrast difference with the inner surface of the joint, so that the display mark is identified and photographed even in muddy water. be able to. Therefore, the state of the waterproof member (such as whether or not the waterproof member is in close contact with the inner surface of the joint) is identified from the image taken by the borehole camera, and the state (soundness) of the waterproof member disposed in the joint is determined. It can be easily confirmed.

  In addition, by attaching a buffer member to the lower part of the cylindrical body that houses the borehole camera, it is possible to prevent the cylindrical body from being damaged even when protrusions or the like are present on the inner surface of the joint.

  Further, when the signal cable of the borehole camera is supported by the rod and the shooting direction instruction mark indicating the shooting direction of the borehole camera is provided on the rod, the shooting direction of the borehole camera can be appropriately controlled.

  Further, by filling the cylindrical body with fresh water, it is possible to prevent the cylindrical body from being damaged by water pressure even when the cylindrical body is inserted to a depth affected by the water pressure.

The perspective view of the imaging device in the steel pipe sheet pile joint which concerns on embodiment of this invention. The perspective view of a steel pipe sheet pile. The cross-sectional view inside a joint. The perspective view and expansion | deployment figure of a waterproof member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 illustrate a photographing apparatus (hereinafter referred to as a photographing apparatus) in a steel pipe sheet pile joint according to an embodiment of the present invention. FIG. 1 is a perspective view of the photographing apparatus, and FIG. 2 is a perspective view of a steel pipe sheet pile. 3 is a transverse sectional view of the inside of the joint, and FIG. 4 is a perspective view (a) and a developed view (b) of the waterproof member.

<Outline of the photographing device>
As shown in FIG. 1, an imaging device 10 according to an embodiment of the present invention is a device that is used to check the state in a joint when connecting adjacent steel pipe sheet piles, and as a main component member The borehole camera 20, the cylindrical body 30 that houses the borehole camera 20, and a signal cable 40 that is connected to the borehole camera 20 and transmits a video signal and the like.

  In particular, this photographing apparatus 10 has a waterproof member 120 attached to one steel pipe sheet pile joint (T-type joint 110), and one steel pipe sheet pile joint (T-type joint) in the other steel pipe sheet pile joint (P-type joint 100). The joint 110) is inserted, and the waterproof member 120 attached to the joint of one steel pipe sheet pile (T-type joint 110) is confirmed in the other steel pipe sheet pile joint (P-type joint 100). Use to do. Specifically, for example, as shown in FIG. 3, when a P-type joint 100 and a T-type joint 110 are used in combination as a steel pipe sheet pile joint, a waterproof member 120 made of a rubber plate or the like is attached to the T-type joint 110. The T-type joint 110 is inserted into the P-type joint 100, and the waterproof member 120 is used to check what state the P-type joint 100 is in.

  As shown in FIG. 2, generally, a steel pipe sheet pile is a member used when constructing a water blocking wall or the like, and a joint (P-type) is provided along the length direction of the steel pipe main body 200 on the outer periphery of the steel pipe main body 200. A joint 100 and a T-shaped joint 110) are attached. In order to construct a steel pipe sheet pile in the ground, the steel pipe sheet pile is pressed into the ground by a static load by hydraulic pressure, or an auger screw is inserted into the steel pipe main body 200 to excavate and remove the earth and sand in the steel pipe main body 200. Various construction methods exist such as press-fitting a sheet pile into the ground, or drilling in advance and inserting a steel pipe sheet pile into the hole.

  At this time, joints (P-type joint 100 and T-type joint 110) attached to the steel pipe body 200 are also constructed in the ground together with the steel pipe body 200. When constructing steel pipe sheet piles, the pipe joint (P-type joint 100) is filled with bentonite mud water to prevent penetration resistance between the joints, and another steel pipe sheet pile is inserted into the ground adjacent to the existing steel pipe sheet pile. Thereafter, a washing tube is inserted into the joint (P-type joint 100) to wash out bentonite mud and the like. However, even if such cleaning is performed, the field of view is obstructed due to the presence of bentonite mud that cannot be removed in the joint (P-type joint 100) and muddy water that has entered from the ground, and a general borehole camera. 20, it was difficult to photograph the inside of the joint (P-type joint 100).

  As described above, when connecting adjacent steel pipe sheet piles, for example, as shown in FIG. 3, a waterproof member 120 made of a rubber plate or the like is attached to the T-type joint 110, and the T-type joint 100 has a T The mold joint 110 is inserted, and the waterproof member 120 is brought into close contact with the inner surface of the P-type joint 100. In addition, the interior of the P-type joint 100 is filled with mortar (not shown) in order to make the water stoppage perfect. Therefore, by using the imaging device 10 of the present invention, the joint (P-type joint 100) filled with muddy water is confirmed by checking the inside of the joint (P-type joint 100) and the state of the waterproof member 120 when constructing the steel pipe sheet pile. ), The state of the waterproof member 120 disposed in the joint (P-type joint 100) can be reliably confirmed.

<Steel sheet pile>
In the present invention, as shown in FIG. 2, the steel pipe sheet pile for which the state of the waterproof member 120 is to be confirmed includes joints (P-type joint 100 and T-type joint 110) along the longitudinal direction of the outer periphery of the steel pipe main body 200. It is attached. In addition, the diameter of steel pipe sheet pile to which this invention is applied, length, the thickness of a steel pipe, the connection method of one unit of steel pipe sheet pile, etc. are not specifically limited.

<Fitting>
As described above, steel pipe sheet piles are generally used, and as shown in FIG. 2, joints (P-type joint 100 and T-type joint 110) are attached along the longitudinal direction of the outer peripheral surface thereof. ing. In particular, a joint that can effectively use the present invention is a combination of a P-type joint 100 and a T-type joint 110 as shown in FIG. 3, and the T-type joint 110 is a waterproof member that is in close contact with the inner surface of the P-type joint 100. 120 is attached. In addition, as long as the waterproof member 120 is attached to at least one joint and the waterproof member 120 is in close contact with the inner surface of the other joint, the combination is not limited to the combination of the P-type joint 100 and the T-type joint 110. Alternatively, a combination of joints of other shapes may be used.

<Waterproof material>
As shown in FIG. 3, the waterproof member 120 is made of a rubber plate or the like attached to the surface of the T-type joint 110, and is bent when the T-type joint 110 is inserted into the P-type joint 100. The shape is in close contact with the inner surface. The waterproof member 120 is required to have flexibility and elasticity. However, if the closed space can be formed on the inner surface of the joint to be connected (P-type joint 100), the material, size, shape, and the like are particularly limited. Is not to be done.

  Further, as shown in FIGS. 4A and 4B, the waterproof member 120 is provided with a display mark 121 having a contrast difference with the inner surface of the P-type joint 100 at the edge along the length direction. is there. For example, when the inner surface of the P-type joint 100 is a color with low brightness such as brown or black, the display mark 121 is configured to produce a contrast difference as a color with high brightness such as white.

  In the present embodiment, marking is performed on the edge of the waterproof member 120 in the longitudinal direction using white paint. Note that the color of the display mark 121 can be changed as appropriate. The display mark 121 may be a bar line (white line) provided at predetermined intervals. Thus, by providing the display marks 121 at a predetermined interval (for example, every 50 cm), the depth of the joint can be grasped when imaged by the borehole camera 20. At this time, the depth (position from the joint bottom) may be displayed by drawing a number together with the bar (white line).

<Cylindrical body>
The cylindrical body 30 is a member that accommodates the borehole camera 20, and is made of, for example, an acrylic pipe having translucency. In addition, the cylindrical body 30 does not need to have translucency in all directions, and the photographing direction of the borehole camera 20 only needs to have translucency. Note that the translucent member refers to obtaining an image necessary for observation by transmitting image light from a photographing target when photographing the inside of the joint (P-type joint 100) using the borehole camera 20. In addition to being colorless and transparent, the member may be a member having a filter effect that blocks or transmits light of a specific wavelength.

  As shown in FIG. 1, the cylindrical body 30 needs to close the bottom and insert the signal cable 40 into the top so that the inside is sealed. Therefore, an acrylic pipe with a closed bottom is used, and a rubber plug 50 having an insertion hole 51 for the signal cable 40 is inserted into the upper portion, and between the rubber plug 50 and the cylindrical body 30 and between the insertion hole 51 and the signal cable 40. In order to make the space hermetically sealed, it is preferable to use a sealing material or the like as necessary. In the case of a pipe penetrating vertically, a rubber plug (buffer member 60 in the example shown in FIG. 1) is also inserted into the bottom, and a sealing material or the like is used as necessary.

  Moreover, it is preferable to attach the buffer member 60 to the bottom of the cylindrical body 30. The buffer member 60 is made of, for example, a rubber cap. As described above, the rubber plug attached to the bottom of the pipe penetrating vertically can also be the buffer member 60. When the buffer member 60 is attached to the bottom of the cylindrical body 30, the shooting direction by the borehole camera 20 is lateral to the joint inner surface. That is, since the buffer member 60 is present at the bottom of the cylindrical body 30, in general, it is not possible to photograph the downward direction with the borehole camera 20, but a member having translucency is used as the buffer member 60. In this case, it is possible to shoot in the downward direction.

  It is preferable that the borehole camera 20 is housed in the cylindrical body 30 and is filled with fresh water. As will be described in detail later, the borehole camera 20 includes a mirror 23, an imaging lens system 21, an imaging element 22, and other components housed in a sealed state in a cylindrical case 24. Shimizu never enters. Thus, even if the cylindrical body 30 is inserted to the vicinity of the lower part of the joint by filling the inside of the cylindrical body 30 with fresh water, the cylindrical body 30 is damaged by the water pressure of muddy water, or turbid water is There is no risk of entering the body 30 and no adverse effect is exerted on the photographing by the borehole camera 20.

<Borehole camera>
The borehole camera 20 is a camera for photographing internal images such as a boring hole and a hollow pile, and a commercially available one can be used. As shown in FIG. 1, the borehole camera 20 includes an imaging lens system 21, an imaging element 22, and an illumination device 25 as a basic configuration. Further, as shown in FIG. 1, in order to perform lateral shooting, a mirror 23 for bending imaging light from the imaging target may be provided, and the mirror 23 is an attachment member that can be attached to and detached from the camera body. It is good. Further, a zooming mechanism, a focus mechanism, a pan / tilt mechanism, and the like may be provided.

  The imaging light that has entered the imaging lens system 21 forms an image on the imaging element 22 and is taken into a personal computer (not shown) or the like via the signal cable 40 as a video signal of the subject to be photographed. Although not shown, the image of the object to be imaged (in the present invention, the inner surface of the joint) can be displayed on a monitor screen connected to a personal computer or printed by a printer.

  In the present embodiment, it is possible to observe whether or not the waterproof member 120 attached to the T-type joint 110 is in close contact with the inner surface of the P-type joint 100 based on an image photographed by the borehole camera 20.

<Signal cable>
The signal cable 40 is a member that is used to send out the borehole camera 20 when the borehole camera 20 is inserted into the joint, and transmits a video signal from the borehole camera 20 to a personal computer or the like installed on the ground. is there. The length of the signal cable 40 can be appropriately set according to the length of the steel pipe sheet pile and the situation of the site where the personal computer is installed.

<Rod>
The rod 70 is a member that supports the signal cable 40 and assists the feeding of the borehole camera 20 when the borehole camera 20 is inserted into the joint, and uses a cleaning pipe for cleaning the inside of the joint. May be. Moreover, as shown in FIG. 1, it is preferable to provide a shooting direction instruction mark 71 indicating the shooting direction of the borehole camera 20 on the rod 70.

  The shooting direction instruction mark 71 is used to indicate the shooting direction of the borehole camera 20 (the direction of the lens that forms the imaging light). The rod 70 may be marked at predetermined intervals, or the entire length of the rod 70 may be indicated. Marking may be performed. Further, depth information for displaying the insertion depth of the borehole camera 20 may be displayed together with the shooting direction instruction mark 71. For the depth information, for example, the shooting direction instruction marks 71 may be provided at intervals of 50 cm, and the depth may be displayed numerically next to it. Thereby, it is possible to accurately grasp not only the shooting direction but also the shooting depth.

<Other embodiments>
In the above-described embodiment, the case where the P-type joint 100 and the T-type joint 110 are used has been described. However, the present invention has a configuration in which the waterproof member 120 is attached to the joint and used in order to ensure water-stopping in the joint. If it exists, it can be applied to other than the combination of the P-type joint 100 and the T-type joint 110.

DESCRIPTION OF SYMBOLS 10 Imaging device 20 Borehole camera 21 Imaging lens system 22 Imaging element 23 Mirror 24 Case 25 Illumination device 30 Cylindrical body 40 Signal cable 50 Rubber plug 51 Insertion hole 60 Buffer member 70 Rod 71 Shooting direction instruction mark 100 P type joint 110 T type Joint 120 Waterproofing member 121 Depth display mark 200 Steel pipe body

Claims (3)

When connecting adjacent steel pipe sheet piles, a waterproof member is attached to the joint of one steel pipe sheet pile, the joint of the one steel pipe sheet pile is inserted into the joint of the other steel pipe sheet pile, and the joint of the one steel pipe sheet pile is inserted. A photographing device for confirming the state of the attached waterproof member,
A cylindrical member that has a translucent member at least in the photographing direction, and seals and accommodates the borehole camera;
A signal cable extended from a borehole camera housed in the cylindrical body,
A rod for supporting the signal cable;
With
An imaging device in a steel pipe sheet pile joint, wherein a shooting direction indication mark indicating a shooting direction of a borehole camera is provided on the rod . The imaging device in a steel pipe sheet pile joint according to claim 1, wherein the cylindrical body is filled with fresh water. The imaging device in the steel pipe sheet pile joint according to claim 1 or 2, wherein a buffer member is attached to a lower portion of the cylindrical body.

Images