Method for installing a lining body into a hollow structure, support members, adjustment jigs, and lining structure.

Abstract

This invention provides a method for easily positioning a lining body within a cavity structure. [Solution] The present invention is a method for installing a lining body on the inner circumferential surface of a hollow structure. The method includes the steps of: installing a support member on the lower side of the inner circumferential surface of the hollow structure along the longitudinal direction of the hollow structure; placing a lining body 2 on the support member 3; and applying force to the lining body 2 from above. The support member 3 comprises a contact member 30 that abuts against the outer circumferential surface 2a of the lining body 2, base portions 31 and 37 on which the contact member 30 is provided, and a height adjustment mechanism 32 for adjusting the height of the contact member 30 relative to the base portions 31 and 37. The step of installing the support member 3 includes an adjustment step of adjusting the height of the support member 3 according to the distance between the outer circumferential surface 2a of the lining body 2 and the inner circumferential surface 100a of the hollow structure 100.

Description

Technical Field

[0004] ,

[0005] ,

[0001] The present invention relates to a method for installing a lining body used as an interior lining of a hollow structure into the hollow structure.

Background Art

[0002] Conventionally, hollow structures such as aging sewer pipes (also referred to as "existing pipes") have been rehabilitated, that is, repaired and reinforced. As a rehabilitation method, a cylindrical lining body is internally lined in a hollow structure (for example, Patent Document 1). The lining body is made of a flexible synthetic resin, and a plurality of lining bodies are arranged side by side in the length direction of the hollow structure and connected to each other. A spacer or the like is provided inside the existing pipe to position the lining body, and a filler such as cement milk or mortar is injected between the inner peripheral surface of the hollow structure and the lining body to fix the lining body inside the hollow structure, whereby the lining body is installed in the hollow structure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to aging or the like, the inner peripheral surface of the hollow structure is not always a flat surface but may have irregularities, or there may be an inclination along the length direction of the hollow structure (hereinafter also referred to as the "length direction"), making it difficult to accurately position the lining body along the length direction. In general, the lining body has a circular cross-sectional shape perpendicular to the length direction, but when the cross-sectional shape of the internal space of the hollow structure is not circular, the distance between the lining body and the inner peripheral surface of the hollow structure is not constant, making it difficult to position the lining body.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide a method for installing a lining body to a hollow structure that allows for easy positioning of the lining body to the hollow structure, a support member used in this method, an adjustment jig, and a lining structure. [Means for solving the problem]

[0006] To achieve the above objectives, the present invention encompasses the subject matter described in the following sections.

[0007] Item 1: A method for installing a lining body on the inner surface of a hollow structure, A step of installing a support member along the length direction of the cavity structure on the lower side of the inner circumferential surface of the cavity structure, The steps include: placing the lining body on the support member, The process includes applying force to the lining body from above, The support member comprises a contact member that contacts the outer circumferential surface of the lining body, a base on which the contact member is provided, and a height adjustment mechanism for adjusting the height of the contact member relative to the base. A method comprising the step of installing the support member, the step of adjusting the height of the support member according to the distance between the outer circumferential surface of the lining body and the inner circumferential surface of the cavity structure.

[0008] Item 2: The support member comprises at least one of a first support member and a second support member. The first support member has the height adjustment mechanism, The method according to claim 1, wherein the second support member has the height adjustment mechanism and a rotation mechanism for rotating the contact member relative to the base.

[0009] Item 3: The support member comprises one first support member and a plurality of second support members, The method according to claim 2, wherein the second support members are arranged on both sides of the first support member along the circumferential direction of the lining body.

[0010] Section 4: The step of adjusting the support member is: The method according to claim 3, further comprising a first adjustment step of adjusting the height of the contact member of the first support member.

[0011] Item 5: The step of adjusting the support member is: The method according to claim 4, further comprising a second adjustment step of adjusting the height of the contact member of the second support member.

[0012] Item 6: The method according to Item 5, wherein the second adjustment step is performed using an adjustment jig.

[0013] Item 7: The method according to Item 1, wherein the step of applying force to the lining body from above is performed by an anti-float member provided between the upper side of the inner circumferential surface of the cavity structure and the lining body.

[0014] Item 8: The method according to item 2 or 3, wherein the contact member of the second support member rotates by the steps of applying force from above to the lining body and / or installing the support member.

[0015] Item 9: A support member used in the method described in any one of items 1 to 8.

[0016] Item 10: An adjustment jig used in the method described in Item 6, wherein the adjustment jig has a curved surface having the same curvature as the outer surface of the lining body.

[0017] Item 11: A lining structure formed using the method described in any one of items 1 to 8, A lining body that is placed on the inner surface of a hollow structure, The support member is provided on the lower side of the inner circumferential surface of the cavity structure, along the length direction of the cavity structure, The anti-float member is provided between the upper side of the inner circumferential surface of the cavity structure and the lining body, A lining structure comprising a filler material that fills the space between the inner circumferential surface of the cavity structure and the lining body. [Effects of the Invention]

[0018] According to the present invention, the positioning of the lining body in the cavity structure can be easily performed.

Brief Description of the Drawings

[0019] [Figure 1] It is a cross-sectional view showing a schematic configuration of an entire inner lining structure provided in a cavity structure according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view for explaining the step of installing the first support member. [Figure 3] It is a cross-sectional view along the longitudinal direction for explaining the step of installing the first support member. [Figure 4] It is a perspective view for explaining the step of installing the first support member. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ [Figure 18] This is a plan view showing the anti-float member as seen from the inner circumferential surface of the hollow structure. [Figure 19] This is a side view of the anti-float component. [Figure 20] This is a front view of the anti-float component. [Figure 21] This is a cross-sectional view along line AA in Figure 18. [Modes for carrying out the invention]

[0020] An embodiment of one of the present inventions, a method for installing a lining body 2 on the inner circumferential surface 100a of a hollow structure 100, a support member 3 used in this method, an adjustment jig 7, and an embodiment of the lining structure 1 formed using this method, will be described with reference to the drawings.

[0021] In this specification, unless otherwise specified, the direction in which the hollow structure 100 extends is referred to as the longitudinal direction, and a plane perpendicular to the longitudinal direction is referred to as a cross-section. In Figure 1, the vertical direction is referred to as the vertical direction or height of the hollow structure 100 and the lining structure 1, and the left-right direction perpendicular to the vertical direction is referred to as the left-right direction of the hollow structure 100 and the lining structure 1. A cross-section is a plane that includes the vertical direction and the left-right direction. The longitudinal direction, vertical direction, and left-right direction are perpendicular to each other.

[0022] (Lining structure 1) The lining structure 1 is installed in the internal space of the hollow structure 100. The hollow structure 100 is, for example, a cylindrical sewer pipe, and in this embodiment, the cross-sectional shape of the internal space of the hollow structure 100 (hereinafter also referred to as "cross-sectional shape of the hollow structure 100") is horseshoe-shaped. In this embodiment, a horseshoe shape is defined as a periphery that is composed of an upper edge 100c which is a semicircular curve, intermediate edges 100d which are continuous with the upper edge 100c and are curves that are more curvatured than the upper semicircle and convex outward, and a lower edge 100e which is a curve that is more curvatured than the upper semicircle and convex outward and extends in the left-right direction. The area of ​​the inner circumferential surface 100a of the hollow structure 100 that includes the lower edge 100e is called the lower surface 100b. The shape of the internal space is not limited to a horseshoe shape, and may be circular, elliptical, quadrilateral, polygonal, etc. The maximum distance between any two points on the periphery of an interior space is typically between 2000 mm and 5000 mm.

[0023] The lining structure 1 comprises a lining body 2 that is lined to the inner circumferential surface 100a of the hollow structure 100, support members 3 (3A to 3C) provided on the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 along the length direction of the hollow structure 100, an anti-float member 6 provided between the upper side of the inner circumferential surface 100a of the hollow structure 100 and the lining body 2, and a filler material 5 that is filled between the inner circumferential surface 100a of the hollow structure 100 and the lining body 2.

[0024] (Lining body 2) The lining body 2 comprises a cylindrical body 20 (Figures 17-19) with a circular cross-section, and its inner diameter is set to match the size of the hollow structure 100. The lining body 2 has a length (width) of approximately 30 cm, for example, and multiple lining bodies 2 are connected in the length direction and installed in the internal space of the hollow structure 100. The lower side of the outer peripheral surface 2a of the lining body 2 abuts against the support member 3. The outer peripheral surface 2a of the lining body 2 refers to the outermost part of the lining body 2 in the radial direction. For example, if the cylindrical body 20 is provided with frame material 21 or ribs 23 (Figures 17-19), the outermost part of the lining body 2 is the tip of the frame material 21 or ribs 23. If the cylindrical body 20 is not provided with frame material 21 or ribs 23, the outermost part of the lining body 2 in the radial direction is the outer peripheral surface of the cylindrical body 20. When the outer surface 2a of the lining body 2 is said to be in contact with the support member 3, it means that the outer surface of the cylindrical body 20 of the lining body 2 is in contact with the support member 3, or that the tip of the frame material or rib 23 is in contact with the support member 3. Details of an example of the lining body 2 will be described later.

[0025] In the cross-sectional view shown in Figure 1, with the lining body 2 installed inside the hollow structure 100, the most downwardly convex vertex of the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 is located on a virtual line O that runs vertically through the center point P of the cylindrical body 20 of the lining body 2.

[0026] (Support member 3) The support member 3 is for supporting the lining body 2 from below and is attached to the lower side (bottom surface 100b in this embodiment) of the inner circumferential surface 100a of the hollow structure 100. The lower side of the hollow structure 100 refers to the side below half the height of the hollow structure 100. The support member 3 includes at least a height adjustment mechanism 32. In this embodiment, there are two types of support members 3: a first support member 3C and second support members 3A and 3B. The side furthest from the first support member 3C is called the second support member 3A, and the side closer to the first support member 3C is called the second support member 3B.

[0027] As shown in Figure 1, this embodiment comprises one first support member 3C and four second support members 3A and 3B. The first support member 3C is located on the imaginary line O in the cross-sectional view shown in Figure 1. The second support members 3A and 3B are arranged in equal numbers (two on each side) on both sides of the first support member 3C in the cross-sectional view. The first support member 3C and the second support members 3A and 3B are located at equal intervals along the circumferential direction. The second support member 3A is located on the imaginary line A in the radial direction at a central angle α1 with the center point P of the cylindrical body 20 of the lining body 2 as the center point, and the second support member 3B is located on the imaginary line B in the radial direction at a central angle α2 respect to the center point P of the cylindrical body 20 of the lining body 2 as the center point, and In this embodiment, the number of second support members 3A and 3B is not limited to two on each side of the first support member 3C (a total of four). There may be one on each side (a total of two), or three or more on each side (a total of six or more). However, it is preferable that they are arranged symmetrically on either side of the first support member 3C. Furthermore, the support member 3 may not include the second support members 3A and 3B, and may consist only of the first support member 3C.

[0028] (First support member 3C) As shown in Figures 10 to 12, the first support member 3C includes a contact member 30 that abuts against the outer circumferential surface 2a of the lining body 2, a base 31 on which the contact member 30 is provided, and a height adjustment mechanism 32 provided on each base 31 for adjusting the height of the contact member 30 relative to the base 31. In the description of the first support member 3C and the second support members 3A and 3B described later, the side where the base 31 is located is defined as the lower side, and the side where the contact member 30 is located is defined as the upper side, defining the vertical direction. The vertical direction is also called "height". The length direction of the contact member 30 (the direction in which the contact member 30 extends) is defined as the length direction, and the direction perpendicular to the length direction and the vertical direction is defined as the left-right direction.

[0029] The base 31 of the first support member 3C is a plate-shaped member with a rectangular planar shape, and is provided with a through hole 31a for screwing a screw 101 to the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100. The lower end of a rod-shaped bolt 33 is attached to the center of the upper surface of the base 31 by attachment means such as welding. A first nut 34A and a second nut 34B are screwed onto the tip of the bolt 33, and a contact member 30 is sandwiched between the first nut 34A and the second nut 34B. As a result, the contact member 30 is firmly attached to the bolt 33, and the height of the contact member 30 relative to the base 31 can be adjusted by changing the positions of the first nut 34A and the second nut 34B along the length direction of the bolt 33, i.e., the vertical direction.

[0030] The first nut 34A, the second nut 34B, and the bolt 33 constitute the height adjustment mechanism 32. In this embodiment, washers 35 are provided between the first nut 34A and the lower surface of the bottom plate 30a (described later) of the contact member 30, and between the second nut 34B and the upper surface of the bottom plate 30a of the contact member 30, thereby firmly fixing the contact member 30 between the first nut 34A and the second nut 34B. Note that washers 35 may not be provided. Also, the second nut 34B may not be provided, and the contact member 30 may be supported by the first nut 34A.

[0031] The contact member 30 is a channel steel with a U-shaped cross-section that opens upwards, and extends along the length of the hollow structure 100. In this embodiment, as shown in Figures 10 and 11, the contact member 30 comprises a bottom plate 30a and a pair of side plates 30b extending from the left and right ends of the bottom plate 30a in a direction perpendicular to the bottom plate 30a. The bottom plate 30a is provided with a through hole 30d for passing a bolt 33 of the height adjustment mechanism 32 through. As shown in Figure 12, the through hole 30d is an elongated hole in the length direction, and the bolt 33 is relatively movable along the through hole 30d. This allows for fine adjustment of the longitudinal position of the contact member 30 relative to the bolt 33. The tip surfaces 30c of the pair of side plates 30b abut against the outer circumferential surface 2a of the lining body 2. Because the contact member 30 is made of channel steel, the first support member 3C can support the lining body 2 at two points on the tip surfaces 30c of the pair of side plates 30b in cross-sectional view.

[0032] The contact member 30 may be formed by connecting multiple channel steel sections in the longitudinal direction to form a single unit. In this case, one channel steel section may be attached to one base 31 and height adjustment mechanism 32, or one channel steel section may be attached to multiple base 31 and height adjustment mechanism 32. When the contact member 30 is composed of multiple channel steel sections, as shown in Figure 10, a plate-shaped connecting auxiliary member 30e may be provided on the inner surface of each pair of side plates 30b of each channel steel section, projecting further in the longitudinal direction from one end of the side plate 30b. When connecting another channel steel section to one end of a channel steel section, the connecting auxiliary member 30e can be placed along the inner surface of the side plate 30b of the channel steel section to be connected, making it easier to connect the channel steel sections in a straight line. Alternatively, the contact member 30 may be composed of a single channel steel section.

[0033] As shown in Figures 3 and 4, the base 31 and height adjustment mechanism 32 of the first support member 3C are provided at multiple locations along the length of the hollow structure 100 at regular intervals. The interval is, for example, 1 m.

[0034] Multiple through holes 30d are provided in the bottom plate 30a along the length direction, and the spacing between adjacent through holes 30d is approximately equal to the spacing between adjacent bases 31 and height adjustment mechanisms 32 provided in the hollow structure 100.

[0035] (Second support members 3A, 3B) As shown in Figure 1, the second support members 3A and 3B are provided in pairs on both sides of the lining body 2 in the circumferential direction, with the first support member 3C in between.

[0036] Figures 13(A), 13(B), 14(A), and 14(B) show the second support members 3A and 3B. The second support members 3A and 3B each include a contact member 30 that abuts against the outer circumferential surface 2a of the lining body 2, a base 37 on which the contact member 30 is provided, a height adjustment mechanism 32 provided on each base 37 for adjusting the height of the contact member 30 relative to the base 37, and a rotation mechanism 36 for rotating the contact member 30 relative to the base 37.

[0037] The base 37 of the second support members 3A and 3B has an L-shaped cross-section, and the second piece 37c is connected to the end of the first piece 37b at an angle of approximately 90 degrees to the first piece 37b. The first piece 37b is provided with a through hole 37a for screwing the second support members 3A and 3B to the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100. The second piece 37c is provided with a through hole 37d through which a bolt 39 of the rotating member 38 passes, allowing the rotating member 38 to be rotatably attached.

[0038] The rotating mechanism 36 includes a rotating member 38, a bolt 39, and a first nut 40A. The rotating member 38 has an L-shaped cross-section, with a second piece 38b connected to the end of the first piece 38a along the vertical direction at an angle of approximately 90 degrees to the first piece 38a. A through hole 38c is formed on the lower side of the first piece 38a, corresponding in size to the through hole 37d of the second piece of the base 37. The first piece 38a of the rotating member 38 is positioned such that the through hole 37d of the base 37 and the through hole 38c of the rotating member 38 overlap on the outer surface of the second piece 37c of the base 37 (the surface of the second piece 37c of the base 37 that is opposite to the first piece side). By screwing a bolt 39 into the threaded through holes 37d and 38c, and attaching a first nut 40A to the bolt 39, the rotating member 38 is supported so that it can rotate relative to the second piece 37c of the base 37. This allows the rotating member 38 to rotate on a plane including the left-right and up-down directions around the bolt 39. The rotating member 38 is provided with a contact member 30 via a height adjustment mechanism 32, and the contact member 30 is rotated by the rotating mechanism 36 so that the contact member 30 contacts the outer circumferential surface 2a of the lining body 2. Alternatively, the rotating mechanism 36 may be equipped with a second nut, and the rotating member 38 may be supported so that it can rotate relative to the second piece 37c of the base 37 by sandwiching the second piece 37c of the base 37 and the first piece 38a of the rotating mechanism 36 with the first nut 40A and the first nut from both sides of the bolt 39.

[0039] A restricting member 42 is provided on the outer surface of the second piece 37c of the base 37, that is, the surface on which the rotating member 38 is provided, in order to restrict the amount of rotation of the rotating member 38. The rotating member 38 rotates left and right with respect to the vertical direction, but when the end of the first piece comes into contact with the restricting member 42, further rotation is restricted.

[0040] A height adjustment mechanism 32 is provided via a nut 41 inside the first piece 38a and the second piece 38b of the rotating member 38, at a position above the bolt 39 and the first nut 40A of the rotating mechanism 36. The nut 41 is attached to the inside of the first piece 38a and the second piece 38b of the rotating member 38 by welding or the like, and the lower end of the bolt 33 of the height adjustment mechanism 32 is fixed to the nut 41.

[0041] The height adjustment mechanism 32 of the second support members 3A and 3B has the same configuration as the height adjustment mechanism 32 of the first support member 3C, so the same reference numerals are used and the explanation is omitted. Also, the contact members 30 of the second support members 3A and 3B have the same configuration as the contact member 30 of the first support member 3C, so the same reference numerals are used and the explanation is omitted. The other configurations are also the same as those of the first support member 3C unless otherwise specified.

[0042] Note that the vertical lengths of the rotating member 38 may differ for the second support members 3A and 3B. Distance OL (Figure 1) is the distance between the outer circumferential surface 2a of the lining body 2 and the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 on the imaginary line O. The second support member 3A is provided such that the bolt 33 of the height adjustment mechanism 32 of the first support member 3C lies along the imaginary line A, and the second support member 3B is provided such that the bolt 33 of the height adjustment mechanism 32 of the second support member 3B lies along the imaginary line B. Distance AL between the outer circumferential surface 2a of the lining body 2 and the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 on the imaginary line A is longer than distance BL between the outer circumferential surface 2a of the lining body 2 and the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 on the imaginary line B. Therefore, in this embodiment, the vertical length of the rotating member 38 of the second support member 3A is set to be longer than that of the second support member 3B.

[0043] The bases 37 and height adjustment mechanisms 32 and rotation mechanisms 36 of the second support members 3A and 3B are located in the same positions as the base 31 and height adjustment mechanism 32 of the first support member 3C along the longitudinal direction of the hollow structure 100. In other words, the base 31 and height adjustment mechanism 32 of the first support member 3C and the bases 37 and height adjustment mechanisms 32 and rotation mechanisms 36 of the second support members 3A and 3B are on the same plane.

[0044] Furthermore, the height adjustment mechanism 32 for the first support member 3C and the second support members 3A and 3B is not limited to this embodiment, and may take any form as long as it can adjust the height of the contact member 30. Also, the rotation mechanism 36 for the second support member 3B is not limited to this embodiment, and may take any form as long as it can rotate the contact member 30. Moreover, the shape of the contact member 30 is not limited to this embodiment, and may be flat.

[0045] (Anti-float member 6) The anti-float member 6 is intended to prevent the lining body 2 from separating from the support member 3 and floating up, or from deforming, when the filler material 5 is filled. The anti-float member 6 applies pressure to the lining body 2 from above, thereby pressing the lining body 2 against the first support member 3C and the second support member 3B. In addition, the pressure applied to the lining body 2 by this anti-float member 6 may cause the contact members 30 of the first support member 3C and the second support member 3B to rotate and come into contact with the outer circumferential surface 2a of the lining body 2.

[0046] In this embodiment, five anti-float members 6 are provided. In the cross-sectional view in Figure 9, the anti-float members 6 are located between the upper side of the inner circumferential surface 100a of the cavity structure 100 and the lining body 2, and are positioned on the imaginary line O. Furthermore, they are provided at positions on imaginary lines C that extend radially to the left and right of imaginary line O at a central angle β1 (40 degrees), and at positions on imaginary lines D that extend radially to the left and right of imaginary line O at a central angle β2 (80 degrees). Note that the positions of the anti-float members 6 are not limited to 40 degrees and 80 degrees, but may be at any angle.

[0047] The anti-float member 6 can have any configuration as long as it can pressurize the lining body 2. An example of the anti-float member 6 will be described later.

[0048] (filler 5) The filler material 5 is filled into the space between the inner circumferential surface 100a of the cavity structure 100 and the lining body 2 after the lining body 2 is supported by the support member 3 and pressurized by the anti-float member 6. With the filler material 5 filled, the support member 3 and the anti-float member 6 are embedded in the filler material 5. The filler material 5 is, for example, cement milk or mortar. To avoid deformation of the lining body 2, the filling of the filler material 5 is carried out in stages, in multiple steps from the bottom to the top of the cavity structure 100, and also in stages on the left and right sides at the same height. The filling height per step is, for example, 150 mm or more and 500 mm or less.

[0049] (Adjustment jig 7) The adjustment jig 7 is used in the process of adjusting the height of the second support members 3A and 3B. As shown in Figures 15 and 16, the adjustment jig 7 comprises an arc member 71 formed by curving a strip of steel plate in a front view (Figure 5(A)), a rod-shaped horizontal support member 73 connecting the inner surfaces of the arc member 71, and a spirit level 74 provided on the horizontal support member 73. The adjustment jig 7 has a symmetrical shape in the front view shown in Figure 15(A).

[0050] The curvature of the outer surface 71a of the arc member 71 is equal to the curvature of the outer surface 2a of the lining body 2. In other words, the outer surface 71a of the arc member 71 has a shape similar to a part of the outer surface 2a of the lining body 2. In this embodiment, the circumferential length of the arc member 71 is set to the length of the arc with a central angle of 90 degrees in the cross-sectional view of the lining body 2. The circumferential length of the arc member 71 is not particularly limited and is set to a length that ensures the outer surface 71a of the adjustment jig 7 can reliably contact the left and right second support members 3A at the outermost ends when the adjustment jig 7 is placed on the support member 3.

[0051] A reinforcing rib 72 is erected along the entire circumferential length of the arc member 71, at the center of the width direction of the inner surface of the arc member 71. A rod-shaped horizontal support member 73 is attached to connect the ends of the rib 72. A spirit level 74 is attached to the longitudinal center of the horizontal support member 73, that is, the left-right center of the adjustment jig 7. The spirit level 74 may be detachable. The use of the adjustment jig 7 will be described later.

[0052] (Method of installing the lining body 2 on the inner circumferential surface 100a of the hollow structure 100) Next, a method for installing the lining body 2 on the inner circumferential surface 100a of the hollow structure 100 will be explained using Figures 1 to 9.

[0053] First, a step is performed to install a support member 3 along the length of the hollow structure 100 on the lower side of the inner circumferential surface 100a of the hollow structure 100. The step of installing the support member 3 includes the step of installing the first support member 3C and the steps of installing the second support members 3A and 3B.

[0054] In the process of installing the first support member 3C (Figures 2 to 4), first, the base 31 of the first support member 3C, which is equipped with a height adjustment mechanism 32, is screwed to the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100. In a cross-sectional view, the base 31 is attached to the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 where it intersects with a virtual line O that runs vertically through the center point P when the lining body 2 is placed. The mounting position of this base 31 is the point that protrudes to the lowest part of the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100. As shown in Figures 3 and 4, multiple bases 31 are provided along the length of the hollow structure 100 at predetermined intervals, for example, every 1 m.

[0055] Next, the contact member 30 is attached to the height adjustment mechanism 32. The bolts 33 of the height adjustment mechanism 32 are passed through multiple through holes 30d in the bottom plate 30a of the contact member 30, and the contact member 30 is temporarily fastened with the first nut 34A and the second nut 34B.

[0056] Next, the first adjustment step is performed. In the first adjustment step, the worker adjusts the height of the contact member 30 relative to the base 31 by changing the height of the first nut 34A and the second nut 34B of the height adjustment mechanism 32 by measurement, so that the elevation H of the contact member 30 is a desired value. In Figure 3, the elevation H is constant.

[0057] As shown in Figure 3, the elevation of the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 is not necessarily constant, and there are often irregularities in the vertical direction due to deterioration of the hollow structure 100. In this embodiment, the height of the contact member 30 relative to the base 31 can be adjusted for each first support member 3C by the height adjustment mechanism 32, so that the elevation H of the contact member 30 of the first support member 3C can be kept constant. Note that the elevation H of the contact member 30 of the first support member 3C does not need to be set constant along the length direction of the hollow structure 100, but may be set to have a desired slope along the length direction. Elevation refers to the vertical distance from a reference plane to a certain point measured. Adjusting the height of the contact member 30 relative to the base 31, 37 is also called "adjusting the height of the support member 3".

[0058] Next, the process of installing the second support members 3A and 3B is carried out (Figures 5 and 6). First, the second support member 3A is installed. The base 37 of the second support member 3A, which is provided with the height adjustment mechanism 32, is screwed to the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100. The mounting position of this base 37 is the position of the lower surface 100b that intersects with the imaginary line A in the cross-sectional view. Similar to the first support member 3C, multiple bases 37 are provided at predetermined intervals along the length direction of the hollow structure 100, and are provided at the same positions as the bases 37 of the first support member 3C in the length direction of the hollow structure 100.

[0059] The contact member 30 is attached to the height adjustment mechanism 32 of the second support member 3A. The bolt 33 of the height adjustment mechanism 32 is passed through the through hole in the bottom plate 30a of the contact member 30, and the contact member 30 is temporarily fastened with the first nut 34A and the second nut 34B.

[0060] The second support member 3B is installed in the same manner as the second support member 3A. The mounting position of the base 37 of the second support member 3B is at the position of the lower surface 100b where it intersects with the imaginary line B in the cross-sectional view. In the above description, the second support members 3A and 3B are installed in that order, but they can be installed in either order, and even if there are three or more second support members 3B, they can be installed in any order from any of the second support members 3A and 3B.

[0061] Then, the adjustment process (second adjustment process) of the second support members 3A and 3B is performed using the adjustment jig 7 (Figure 7). First, the adjustment jig 7 is placed on the contact member 30 of the first support member 3C. At this time, the outer surface 71a of the arc member 71 of the adjustment jig 7 and the contact member 30 of the first support member 3C are brought into contact so that the center of the adjustment jig 7 is located at the left-right center of the contact member 30 of the first support member 3C, that is, aligned with the position of the bolt 33.

[0062] The level 74 of the adjustment jig 7 is used to make the adjustment jig 7 horizontal, and the adjustment jig 7 is held horizontally by a holding means (not shown). Since the second support members 3A and 3B are located at the same position in the longitudinal direction of the hollow structure 100 as the first support member 3C, the second support members 3A and 3B will be located below the adjustment jig 7. The height adjustment mechanism 32 is used to adjust the height of the contact members 30 of the second support members 3A and 3B so that the contact members 30 of the second support members 3A and 3B contact the outer surface 71a of the arc member 71 of the adjustment jig 7. The rotation amount of the contact members 30 is also adjusted by the rotation mechanism 36. Once the adjustment of all second support members 3A and 3B located at the same position in the longitudinal direction of the hollow structure 100 is complete, the adjustment jig 7 is removed. The same procedure is performed sequentially for the second support members 3A and 3B that are installed along the longitudinal direction.

[0063] Next, the process of placing the lining body 2 on the support member 3 is performed (Figure 8). The lining body 2 is placed on the contact member 30 of the first support member 3C. At this time, the contact members 30 of the second support members 3A and 3B have already been adjusted in height and rotation position by the adjustment jig 7, so they come into contact with the outer surface 2a of the lining body 2. However, as shown in the partially enlarged view of Figure 8, due to errors or other reasons, contact may not occur, and the second support members 3A and 3B may not support the lining body 2.

[0064] Next, a step is performed to apply force to the lining body 2 from above (Figure 9). The lining body 2 is supported by the placement of the anti-float member 6 between the upper part of the inner circumferential surface 100a of the hollow structure 100 and the lining body 2. Furthermore, the anti-float member 6 applies pressure from above, causing the lining body 2 to move slightly downward, and the lining body 2 is firmly pressed against the support member 3, and supported from below by the reaction force. In this way, the lining body 2 is positioned within the internal space of the hollow structure 100.

[0065] If the contact members 30 of the second support members 3A and 3B are not in contact with the outer circumferential surface 2a of the lining body 2, the downward movement of the lining body 2 due to the pressure of the anti-float member 6 applies force to the second support members 3A and 3B, causing the contact members 30 of the second support members 3A and 3B to rotate. As a result, as shown in the partially enlarged view of Figure 9, the contact members 30 of the second support members 3A and 3B come into contact with the outer circumferential surface 2a of the lining body 2.

[0066] The multiple lining bodies 2 are connected in the longitudinal direction. Therefore, in this embodiment, the process involves placing a lining body 2A on the support member 3 and applying force to this lining body 2A from above. Next, the process involves placing and connecting the next lining body 2B next to this lining body 2A and applying force to the next lining body 2B from above. In other words, the process of applying force is performed after each lining body 2 is placed. However, the process of applying force to each lining body 2 may also be performed after all the lining bodies 2 to be placed in the cavity structure 100 have been placed.

[0067] In this embodiment, all first support members 3C to be installed are placed in the internal space of the hollow structure 100 and a first adjustment process is performed on the first support members 3C, and all second support members 3A and 3B to be installed are placed in the internal space of the hollow structure 100 and a second adjustment process is performed on the second support members 3A and 3B. After that, the process of placing the lining body 2 is performed. However, each step may be performed in the following order. First, the first support members 3C, second support members 3A and 3B are placed in positions aligned along the length of the hollow structure 100, the first adjustment process is performed on the first support member 3C, and the second adjustment process is performed on the second support members 3A and 3B. Next, the process of placing one lining body 2 on top of the first support members 3C, second support members 3A and 3B is performed. Then, the first support members 3C, second support members 3A and 3B are placed in adjacent positions, and each step is performed in the same order.

[0068] Next, the process of filling with filler material 5 is carried out (Figure 1). The filler material 5 is filled into the space between the lining body 2 and the inner circumferential surface 100a of the cavity structure 100, and is filled in multiple stages from the bottom to the top. Up to the upper part of the space from the bottom, the filler material 5 may be filled sequentially on both the left and right sides of the lining body 2. When the filler material 5 is filled up to the upper part of the space of the running body 2, the space above the running body 2 is filled with the filler material 5 all at once. The space between the lining body 2 and the inner circumferential surface 100a of the cavity structure 100 is filled with the filler material 5, and the support member 3 and the anti-float member 6 are embedded in the filler material 5. The anti-float member 6 presses the lining body 2 against the support member 3, preventing the lining body 2 from floating away from the support member 3 due to buoyancy during the filling of the filler material 5.

[0069] In the above method, if the contact members 30 of the second support members 3A and 3B are not in contact with the outer surface 2a of the lining body 2, the step of applying force to the lining body 2 from above will apply force to the second support members 3A and 3B via the lining body 2 due to the pressure from the anti-float member 6. As a result, the contact members 30 of the second support members 3A and 3B will rotate and come into contact with the outer surface 2a of the lining body 2. However, when the step of placing the lining body 2 on the support member 3 is performed, the contact members 30 of the second support members 3A and 3B may rotate due to the weight of the lining body 2 and come into contact with the outer surface 2a of the lining body 2. Alternatively, the contact members 30 of the second support members 3A and 3B may rotate and come into contact with the outer surface 2a of the lining body 2 in both the step of placing the lining body 2 on the support member 3 and the step of applying force to the lining body 2 from above.

[0070] (action) According to the above configuration and method, the support member 3 provided on the lower surface 100b of the inner circumferential surface 100a of the hollow structure 100 is equipped with a height adjustment mechanism 32. Therefore, even if the lower surface 100b is not a flat surface but has irregularities along its length, the elevation of the lining body 2 can be kept constant or set to a desired value, such as a desired slope along its length. In this way, the support member 3 makes it easy to position the lining body 2 at the desired position. Furthermore, even if the elevation of the lining body 2 deviates from the desired value, correction is easy as it only requires adjusting the height adjustment mechanism 32.

[0071] Furthermore, since the first support member 3C of the support member 3 is positioned on a virtual line O that passes through the center point P of the lining body 2 and runs vertically, the contact member 30 always contacts the outer circumferential surface 2a of the lining body 2. For this reason, there is no need to provide a rotation mechanism 36, and the structure can be simplified. The second support members 3A and 3B are positioned on virtual lines A and B that extend diagonally with respect to the virtual line O, and are equipped with a rotation mechanism 36. For this reason, even if the lining body 2 is not in contact with the contact members 30 of the second support members 3A and 3B, the weight of the lining body 2 and the pressure applied to the lining body 2 by the anti-float member 6 cause the contact members 30 to rotate, and the outer circumferential surface 2a of the lining body 2 comes into contact with the contact members 30 of the second support members 3A and 3B. In this way, the contact members 30 of the support member 3 reliably contact the outer circumferential surface 2a of the lining body 2, so that the lining body 2 can be held firmly.

[0072] The contact member 30 of the support member 3 is a channel steel with a U-shaped cross-section, and the tip surfaces 30c of a pair of side plates 30b contact the outer circumferential surface 2a of the lining body 2. In this way, each support member 3 contacts the lining body 2 at two points in cross-sectional view, so it can support the lining body 2 more stably than if it contacted it at only one point.

[0073] Furthermore, the height and rotation of the second support members 3A and 3B are adjusted using the adjustment jig 7. Since the adjustment jig 7 has a curved surface with the same curvature as the outer surface 2a of the lining body 2, the height and rotation of the second support members 3A and 3B can be adjusted before the lining body 2 is placed. In addition, the adjustment jig 7 is lightweight and easy to handle because it consists of an arc member 71 made of a strip of steel plate, a horizontal support member 73, and a spirit level 74. Moreover, the circumferential length of the arc member 71 of the adjustment jig 7 is set to be longer than the circumferential length between the leftmost and rightmost second support members 3A, so that when the adjustment jig 7 is placed on the support members 3, it can reliably come into contact with all of the support members 3.

[0074] Furthermore, the anti-float member 6 applies pressure to the lining body 2 from above, pressing it towards the support member 3. This ensures that the lining body 2 is securely positioned within the internal space of the hollow structure 100, preventing it from floating up when the filler material 5 is filled.

[0075] In this embodiment, the cross-sectional shape of the internal space of the hollow structure 100 was horseshoe-shaped, but it may be any shape such as circular, elliptical, quadrilateral, or polygonal. Similarly, the cross-sectional shape of the lining body 2 is not limited to circular, but may be any shape such as elliptical, quadrilateral, or polygonal. In these cases, the distance between the outer circumferential surface 2a of the lining body 2 and the lower surface 100b of the hollow structure 100 will vary depending on the cross-sectional shape of the hollow structure 100. However, by using the support member 3 of this disclosure, the position of the lining body 2 relative to the lower surface 100b of the hollow structure 100 can be easily adjusted by adjusting the height and rotation amount of the contact member 30.

[0076] (Lining body 2) An example of the lining body 2 will be described in detail. Note that the lining body 2 is not limited to this embodiment, and any known lining body 2 used for the rehabilitation of the hollow structure 100 can be used. As shown in Figure 17, the lining body 2 comprises a cylindrical body 20, a frame material 21 fastened to the cylindrical body 20, and a fastening material 22 for fastening the frame material 21 to the cylindrical body 20 (the "frame material 21" is a general term for the "frame materials 21A and 21B" shown in Figures 17 to 21).

[0077] The cylindrical body 20 is made from a flexible synthetic resin. Multiple ribs 23 are formed on the outer surface 20a of the cylindrical body 20 (Figures 18 and 19), projecting radially outward from the cylindrical body 20 (the term "rib 23" is used as a general term for "ribs 23A and 23B" shown in Figures 17 to 21). As shown in Figure 17, each of the multiple ribs 23 extends around the entire circumference of the cylindrical body 20 and is spaced apart in the width direction of the cylindrical body 20. Numerous notches are formed on each rib 23 at intervals in the circumferential direction of the cylindrical body 20.

[0078] In the following, among the multiple ribs 23 formed on the cylindrical body 20, the rib 23 located at the outermost end in the width direction of the cylindrical body 20 will be referred to as the "outermost rib 23A," and the ribs 23 other than the outermost rib 23A will be referred to as the "other ribs 23B." The width direction of the cylindrical body 20 is the same direction as the length direction of the hollow structure 100 when the lining body 2 is installed in the hollow structure 100.

[0079] At both ends of the cylindrical body 20 in the width direction, engaging portions 24 are formed for connecting the lining bodies 2 together (see Figure 19).

[0080] The cylindrical body 20 described above is formed by shaping a strip of synthetic resin (not shown) into a cylinder and heat-sealing the ends of the strip together (the strip has ribs 23 and engaging parts 24 integrally formed on it).

[0081] Next, the frame members 21 and fasteners 22 of the lining body 2 will be described. The lining body 2 is equipped with a plurality of frame members 21 arranged along the outermost rib 23A. Each of these frame members 21 is a metal I-beam and extends along the outermost rib 23A for a length of about 1 / 10 to 1 / 4 of the circumference of the cylindrical body 20 (Figure 1). In the lining body 2, the plurality of frame members 21 are arranged in the circumferential direction of the cylindrical body 20 so that frame members 21 are present around the entire circumference of the cylindrical body 20. That is, in the lining body 2, frame members 21A and frame members 21B, which extend for a length of about 1 / 10 to 1 / 4 of the circumference of the cylindrical body 20, are alternately provided in the circumferential direction of the cylindrical body 20. The ends of frame members 21A and frame members 21B are opposite each other in the width direction of the cylindrical body 20, so that frame members 21 are present around the entire circumference of the cylindrical body 20.

[0082] As shown in Figure 19, the fastener 22 comprises a cylindrical tube 22a, a circular cross-section insertion member 22b, and a nut 22c, all of which are made of metal. Of the multiple ribs 23 formed on the cylindrical body 20, the ribs 23B other than the outermost rib 23A have first through holes for the tube 22a to pass through. The outermost rib 23A has a second through hole for the insertion member 22b to pass through. The frame members 21A and 21B have third through holes for the insertion member 22b to pass through. The tube 22a is passed through each of the first through holes in the other ribs 23B. The insertion member 22b is passed inside the tube 22a, and the end of the insertion member 22b extends from the tip of the tube 22a.

[0083] Next, the anti-float member 6 will be described. Figures 18 to 21 are enlarged views of the anti-float member 6. The anti-float member 6 is positioned between the upper side of the inner circumferential surface 100a of the hollow structure 100 and the lining body 2 (see Figure 1). As shown in Figures 18 to 21, the anti-float member 6 comprises a contact member 60, a connecting plate 61, a bolt 62, and a nut 63.

[0084] The contact member 60 is a steel material extending in the width direction of the cylindrical body 20 and comes into contact with the frame material 21 (Figure 19). In this embodiment, the contact member 60 is a channel steel with a U-shaped cross-section, and the outer surface of the bottom plate 64 comes into contact with the frame material 21 (Figure 20).

[0085] The connecting plate 61 is a resin plate. As shown in Figures 19 and 21, the connecting plate 61 has through holes 65 and 66 and a slit 67 (Figure 21). The through hole 65 is rectangular in shape, allowing the contact member 60 to pass through. The through hole 66 is circular in shape, allowing the pipe body 22a to pass through. The slit 67 extends from the through hole 66 to the outer edge of the connecting plate 61.

[0086] With the connecting plate 61 described above, the contact member 60 can be connected to the pipe 22a by inserting the pipe 22a into the through hole 66 through the slit 67 while the contact member 60 is passed through the through hole 65, thereby allowing the pipe 22a to pass through the through hole 66.

[0087] As shown in Figure 20, the nut 63 is positioned inside the contact member 60 and is integrated with the contact member 60 by welding it to the bottom plate 64.

[0088] The bolt 62 passes through the through hole 64a in the bottom plate 64 and the through hole 63a in the nut 63, thereby penetrating the contact member 60 in the radial direction of the cylindrical body 20 (Figure 20). The bolt 62 is then fastened to the contact member 60 by screwing together the threaded groove formed on the inner surface of the through hole 63a with the threaded portion formed on the outer surface of the bolt 62. The tip end 62a of the bolt 62 extends from the nut 63 toward the inner circumferential surface 100a of the hollow structure 100, and the tip 62c of the bolt 62 abuts against the inner circumferential surface 100a of the hollow structure 100.

[0089] With the above-described anti-float member 6, the bottom plate 64 of the contact member 60 contacts the frame material 21 of the lining body 2, and the tip 62c of the bolt 62 contacts the inner circumferential surface 100a of the hollow structure 100. Since the anti-float member 6 is provided on the upper side of the hollow structure 100, the anti-float member 6 is positioned between the inner circumferential surface 100a of the hollow structure 100 and the lining body 2, and can press down on the lining body 2 radially from above.

[0090] Note that the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Expressions indicating that things such as "in a certain direction", "along a certain direction", "the same", "identical", "equal", and "homogeneous" are in an equal state not only represent a strictly equal state, but also represent a state in which there are tolerances or differences within a range that can achieve the same function as well. Expressions representing triangular, quadrangular, and circular shapes not only represent shapes in a strictly geometric sense, but also represent shapes including concave and convex portions, chamfered portions, etc. within a range where the same effect can be obtained. Expressions such as "comprising", "having", "including", or "possessing" one component are not exclusive expressions that exclude the existence of other components. "Parallel" and "orthogonal" mean substantially "parallel" and "orthogonal", and include not only a strictly "parallel" and "orthogonal" state, but also a state including errors of about several degrees in meaning. In addition, there may be cases where an expression such as "part", for example, "end part", is used. For example, the "end part" means a part having a certain range including the "end". The same applies to other expressions with "part".

Explanation of Reference Numerals

[0091] 1 Inner lining structure 2 Lining body 3 Support member 3C First support member 3A, 3B Second support member 30 Contact member 31 Base 32 Height adjustment mechanism 36 Rotation mechanism 37 Base 5 Filling material<00,00374>6 Anti-floating member 7 Adjustment jig 100 Hollow structure 100a Inner peripheral surface of the hollow structure

Claims

1. A method for installing a lining body on the inner surface of a hollow structure, A step comprising: installing a plurality of support members at intervals along the circumferential direction of the inner surface of the cavity structure on the lower side of the inner surface of the cavity structure, and not installing any support members on the upper side of the inner surface of the cavity structure, wherein each of the support members is installed along the longitudinal direction of the cavity structure; The steps include: placing the cylindrical lining body on the support member; The process includes applying force to the lining body from above, The plurality of support members comprises one first support member and a plurality of second support members. The second support member comprises a contact member that abuts against the outer circumferential surface of the lining body, a base on which the contact member is provided, a height adjustment mechanism for adjusting the height of the contact member relative to the base, and a rotation mechanism for rotating the contact member relative to the base on a plane including the cross-section of the hollow structure. The first support member has a contact member that abuts the outer circumferential surface of the lining body, a base on which the contact member is provided, and a height adjustment mechanism for adjusting the height of the contact member relative to the base, and does not have the rotation mechanism. The step of installing the support member is: A step of installing the first support member on a virtual line that passes through the center point of the cylindrical lining body and runs vertically along it, The process of installing the first support member is followed by the process of installing the second support member on both sides of the first support member along the circumferential direction of the lining body, with a gap between them and the first support member. A method comprising an adjustment step of adjusting the height of the support member according to the distance between the outer circumferential surface of the lining body and the inner circumferential surface of the cavity structure.

2. The step of adjusting the support member is: The method according to claim 1, further comprising a first adjustment step of adjusting the height of the contact member of the first support member.

3. The step of adjusting the support member is: The method according to claim 1, further comprising a second adjustment step of adjusting the height of the contact member of the second support member.

4. The method according to claim 3, wherein the second adjustment step is performed using an adjustment jig.

5. The method according to claim 1, wherein the step of applying force to the lining body from above is performed by an anti-float member provided between the upper part of the inner circumferential surface of the cavity structure and the lining body.

6. The method according to claim 1, wherein the contact member of the second support member rotates as a result of applying force from above to the lining body and / or installing the support member.

7. A support member used in the method according to any one of claims 1 to 6.

8. An adjustment jig used in the method according to claim 4, wherein the adjustment jig has a curved surface having the same curvature as the outer surface of the lining body.

9. A lining structure formed using the method described in any one of claims 1 to 6, The cylindrical lining body is attached to the inner surface of the aforementioned cavity structure, A plurality of support members are provided on the lower side of the inner circumferential surface of the cavity structure at intervals along the circumferential direction of the inner circumferential surface of the cavity structure, and are not installed on the upper side of the inner circumferential surface of the cavity structure, and each of the support members is installed along the longitudinal direction of the cavity structure, A floating prevention member is provided between the upper side of the inner circumferential surface of the cavity structure and the lining body, A lining structure comprising a filler material that fills the space between the inner circumferential surface of the cavity structure and the lining body.

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