JPH0742222A - Liquid tank made of concrete and repair lining work of sewer pipe and repair lining structure - Google Patents

Abstract

PURPOSE:To facilitate a repair work and securely prevent corrosion after the repair work, by removing corroded faults on the wall face of a concrete body and charging a backing material into the clearance between the concrete wall face and a lining panel arranged at the external face of a metallic frame. CONSTITUTION:The corroded faults on the wall face 1a of a concrete body 1 are removed and the surface is conditioned as the base material and many anchor bolts 2 are buried in the wall face 1a. A female screw cylinder 5 of the fitting plate 4 of a frame body is fixed with the bolts 2. The fitting plate 4 is attached so as to be adjustable in the height. Next, stud bolts 6 are welded at the external face of fitting plate 4 and inserted in fitting holes 8 at the four corners of a rigid metallic frame 7 to fix the frame 7. A number of lining panels 12 made of hard vinyl chloride are fixed at the external face of the frame 7 by use of stud bolts 11. Preventive sash bars 18, 19 are arranged on the external face of the panel 12 to form a lattice and fixed thereon. A backing material 25 like concrete is charged in the space between the wall face la and the panel 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair lining construction method and a repair lining structure for concrete liquid tanks such as sewage integrated treatment tanks and sludge treatment tanks and pipes.

[0002]

2. Description of the Related Art Liquid tanks such as large-capacity sewage treatment tanks and pipes are generally constructed and installed in the ground as reinforced concrete. Such liquid tanks are subject to internal corrosion within a short and unexpected period due to the influence of volatile components from sewage and the like stored inside, especially sulfuric acid and other oxide components generated by bacteria, and the surrounding environment. The wall surface and the ceiling surface of the building become worn out and the structural strength is impaired, and the problem of this corrosion has recently been greatly highlighted.

Therefore, for the sake of safety, the concrete liquid tank etc. in which the above-mentioned corrosion has occurred should be repaired after that, and preferably, the subsequent corrosion can be prevented. There is a strong demand.

Conventionally, the following method has been attempted as a method for repairing such a corroded concrete liquid tank. That is, after removing the corroded part of the concrete skeleton wall surface (used to include the ceiling surface), form a mold with wood or plywood panels on the inside of the wall surface and inject concrete into the mold to cure. After curing, remove the formwork to construct a new concrete wall, and then apply a chemical resistant anticorrosive paint such as tar paint to the new concrete wall for finishing or A construction method is used in which a synthetic resin plate is attached and fixed and the wall surface is lined.

[0005]

However, when the conventional construction method as described above is used, firstly, two steps are required: a new concrete wall building step and a concrete wall finishing step, In particular, the former process requires a lot of labor and time, which is not preferable in terms of construction period and construction cost.

Not only when the concrete wall is lined with a resin plate or the like but also the skeleton strength depends only on the strength of the concrete wall, it is not sufficient for external vibration such as an earthquake. There was a problem with durability.

[0007] On the other hand, when the coating is finished with an anticorrosion paint, there is a problem in the chemical resistance and durability of the coating layer itself of the paint, and corrosion is likely to occur again on the concrete wall surface of the base in a relatively short period of time. , Couldn't be permanent.

In view of the above-mentioned conventional problems, the present invention is superior in strength to the original structure by repairing a corroded liquid tank made of reinforced concrete, etc. The repair lining method and the repair lining constructed by the repair lining method that can be completed without any risk of corrosion after the repair, and can complete the repair work with relatively simple work. It is intended to provide a structure.

[0009]

For the above object, the first invention of the present application relates to a repair lining construction method for a liquid tank such as a sewage treatment tank or a pipe, and a concrete frame for the liquid tank. After removing the corrosion defect portion of the wall surface, the base material is adjusted, a large number of anchor bolts are fixedly planted on the wall surface in a predetermined arrangement, and a rigid metal frame body is arranged at a predetermined distance from the body wall surface and The metal frame body is directly or indirectly fixed using an anchor bolt, and then a plurality of hard synthetic resin lining panels are arranged side by side on the outer surface side of the metal frame body, and each of the lining panels is arranged as described above. Fasten and fix it to the metal frame with bolts and nuts, and then arrange rod-like restraining ties on the outer surface side of the lining panel group in a grid arrangement, etc., and fix it on the lining panel surface with fixing metal fittings. After curing, a backing material such as concrete is injected and filled into the space between the wall surface of the body and the lining panel, and after the curing of the backing material, the restraint shaft and its fixing metal fittings are removed. The lining method is a repair lining method for liquid tanks.

[0010] Preferably, the lining panel is a panel body made of a hard synthetic resin, and an elastic thin plate for cushioning is integrally attached to the peripheral side surface of the panel body. Thus, the stress applied between the adjacent panels is absorbed by the elastic thin plate to prevent the damage of the lining coating and the occurrence of the sealing failure at the joint portion.

Further, it is advantageous to adopt the following steps so that the metal frame can be attached and fixed easily and surely. That is, a frame body mounting plate made of a metal plate of a predetermined size is attached to the tip of an anchor bolt that is fixedly planted on the wall surface of a concrete frame, and a female threaded cylinder portion on the back surface of the frame body mounting plate is screwed onto the bolt so that the height can be adjusted freely. After adjusting the level of the frame mounting plate, it is advantageous to fasten and fix the metal frame to the mounting plate with bolts and nuts.

Furthermore, it is advantageous to mount and fix the restraint board arranged on the surface of the lining panel as follows. That is, as a stud bolt for attaching a lining panel that is fixed to a metal frame, a stud bolt that has a constricted portion at the middle portion in the length direction and has a knock-off portion on the tip side from the constricted portion is used. It is preferable that the knock-off portion of the stud bolt is made to project from the panel surface after the attachment and fixation, and the fixing metal fitting is attached to the knock-off portion to fix the restraining rod.

The second invention of the present application relates to a lining structure for a liquid tank or the like obtained by the above-mentioned lining construction method, wherein a large number of anchor bolts are fixedly planted in a predetermined arrangement on the wall surface of a concrete frame of the liquid tank or the like, and A rigid metal frame body is arranged at a predetermined interval between the metal frame body and the metal frame body is directly or indirectly fixed to the tip end portion of the anchor bolt, and a large number of hard composites are formed on the outer surface side of the metal frame body. Lining panels made of resin plates are laid out in a line,
The lining panel is fastened and fixed to the metal frame body with bolts and nuts, and a backing material such as concrete is injected and solidified in a space between the wall surface of the body and the lining panel. It is what

The lining panel is most preferably made of vinyl chloride resin because of its advantages in terms of chemical resistance and cost.

Further, the lining panel preferably has a shallow step portion on the outer surface of the peripheral portion so as to complete the sealing property of the joint portion between the adjacent panels, and extends over the adjacent panels. Then, the band-shaped joint covering material having a corresponding cross-sectional shape is fitted into the step portion and is fixed by adhesion.

The backing material used in the present invention includes, in addition to general ordinary concrete, polymer cement concrete such as water-based dispersion cement and water-soluble polymer cement, mortar, and epoxy resin. The synthetic resin composition and the like can be mentioned as usable.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

The embodiment shown in FIGS. 1 to 8 shows an example of repair work of a liquid tank such as a corroded sewage treatment tank. The wall surface (1) of the corroded concrete frame (1) of the liquid tank
In the case of a), in most cases, it is in a tattered state, so after removing the corrosion defect portion with an appropriate scraping tool,
The base material of the surface is adjusted.

Then, as shown in FIGS. 1 and 2, a large number of anchor bolts (2) are fixedly planted on the wall surface (1a) at a predetermined arrangement pitch. For example, a hole (3) is made in the concrete frame (1) from the wall surface side, and an anchor portion (2a) is provided in this hole.
The anchor bolt (2) is firmly erected and fixed by inserting and forcibly expanding the hem.

Next, a frame mounting plate (4) called a T plate is attached to the tip of the anchor bolt (2). The frame mounting plate (4) is made of, for example, a steel plate of about 10 cm square, and has a female screw cylinder (5) at the center of its back surface.
The height is adjustable by screwing the female screw cylinder (5) onto the bolt (2) as shown in FIG.

Next, a stud bolt (6) is welded and fixedly erected on the outer surface of the frame mounting plate (4), that is, at an appropriate position on the inner surface of the tank. Of course, this may be attached to the frame attachment plate (4) in advance. The stud bolt (6) has a constriction portion (6b) for cutting at an intermediate portion of its length as shown in FIG. 1 for the convenience of attaching the metal frame body (7) in the next step. It is preferable to use a knock-off portion (6a) on the tip side. Then, the frame mounting plate (4) is rotated around the axis of the anchor bolt (2), and the height of the frame mounting plate (4) is adjusted so that all the frame mounting plates (4) are located in the same plane.

Subsequently, the rigid metal frame body (7) which is a strength member for the tank wall is attached. As can be understood by referring to FIGS. 1 to 3, the frame body (7) includes a frame-shaped peripheral frame portion (7a) having a steel angle member with a side length of about 500 mm, and a central portion thereof. It is composed of a square frame body having one vertical frame portion (7b), and mounting bracket portions (7c) protruding inward are provided at four corners thereof. (8) is a mounting hole provided in the bracket portion (7c). Then, the metal frame body (7) has the stud bolts (6) in any one of the mounting holes (8) at its four corners.
Are fitted and inserted, and a nut (10) is applied through a washer (9) to fasten and fix them. Further, since this alone is not sufficient for the mounting strength, the adjacent metal frame bodies (7) and (7) are connected to each other by connecting holes (16) as shown in FIG.
Fasten and connect with bolts and nuts (16) through a). Then, by repeating such work, a large number of metal frame bodies (7) are arranged vertically and horizontally in a state in which adjacent metal bodies are in close contact with each other, and the frame body group is arranged at a predetermined interval (S) from the concrete wall surface (1a). A reinforcing frame is formed at positions separated from each other. The knock-off portion (6a) of the stud bolt (6) is folded and removed by the cutting constriction portion (6b) after the frame is attached.

Next, with respect to each of the metal frame bodies (7), as shown in FIG. 2, the four corner portions of the peripheral frame portion (7a) and the central portion of the vertical frame portion (7b) are respectively arranged at five points as shown in FIG. The stud bolt (11) is welded and fixed to stand. Of course, the stud bolt (11) may be attached to the metal frame body (7) in advance. Also, this stud bolt (1
1) has a constricting part (11b) for cutting in the middle part of the length, and the part on the tip side from that has a knock-off part (11b).
The one described in a) shall be used.

Next, a large number of square lining panels (12) formed in a corresponding size are arranged in contact with the outer surface of the metal frame (7), and the stud bolts (11) are used. Fix this.

The lining panel (12) is made of a hard synthetic resin, and the resin material is not particularly limited, and any material having excellent chemical resistance and mechanical strength can be used. However, in consideration of cost, a hard vinyl chloride resin plate can be preferably used.

In the illustrated embodiment, the lining panel (12) is a panel body (12a) made of a hard vinyl chloride resin plate having a thickness of about 20 mm, as shown in FIGS.
And a cushioning elastic thin plate (12b) made of a soft vinyl chloride resin, which is attached and integrated on the four side surfaces thereof.
The elastic thin plate (12b) is interposed between the lining panels (12) (12) arranged adjacent to each other after the construction so as to perform a cushioning function and absorb stress applied by expansion and contraction of the panel, vibration during an earthquake, or the like. And helps prevent damage to the lining coating. Therefore, another material may be substituted as long as it is made of an elastic material.

Further, the lining panel (12) has a shallow notch step portion (13) having a width of 20 mm and a height of 3 mm formed on the outer surface of the peripheral edge portion, and has a cross-sectional shape corresponding to a mode in which it extends between adjacent panels after construction. The joint covering material (14) can be fitted therein. Further, a total of five mounting holes (15) are formed at the four corners and the center of the panel body (12a). As shown in FIG. 5, the mounting hole (15) has a bolt insertion hole portion (15a), a nut fitting hole portion (15b), and a blocking piece fitting hole, which are sequentially increased in diameter from the rear surface side of the panel. The part (15c) is formed stepwise.

In order to mount the lining panel (12), the stud bolts (11) projecting from the metal frame (7) are fitted into the five mounting holes (15) and inserted, and the outer surface It is done by fastening a circular nut (17) from the side and fastening. After this fixing, the nut (1
7) is housed in the nut fitting hole portion (15b) of the mounting hole (15), and the knock-off portion (11) of the stud bolt (11).
The a) is formed by penetrating the panel (12) and largely protruding to the outer surface side thereof.

As described above, after fixing a large number of lining panels (12) arranged in a plane in a vertical and horizontal arrangement, the gaps that may remain between the adjacent panels and the mounting nut (17). The peripheral part is filled with a sealing agent and a waterproof treatment is applied. As a result, an integral lining wall having a water blocking effect is completed inside the concrete wall of the liquid tank substantially parallel to the wall surface (1a).

Then, next, the concrete wall surface (1
The space between a) and the lining wall is filled with a backing material such as concrete to integrate the entire lining component, but if the backing material is poured and filled without reinforcing the lining wall, The lining panel (12) may be flexibly deformed by the injection filling pressure of the backing material, or the lining wall may be damaged.

Therefore, before the backfill material is injected, a reinforcement frame for restraint is previously constructed on the outer surface side of the lining wall.
A preferred construction example of this reinforcing frame is shown in FIGS. As shown in the figure, along the outer surface of the lining wall, a plurality of horizontal pipes (18) composed of steel pipes are arranged in parallel and fixed with a fixing metal fitting (20), and further, the above horizontal Vertical restraining rods (19) made of the same steel pipe or the like are arranged and fixed at a predetermined pitch on the restraining rods (18) to form a lattice-shaped reinforcing frame.

As shown in FIGS. 1 and 6, the fixing metal fitting (20) of the restraining rods (18) and (19) has a knock-off portion () of the stud bolt (11) protruding above the surface of the lining panel (12). The female screw portion (21a) at one end of the center spindle (21) is screwed to the center spindle (21a) and attached thereto, and the presser blade member (22) assembled to the spinle (21) so as to be able to move up and down is restrained. 18) After being pressed against the outer surface of (19), by tightening the nut (23) provided on the male screw portion (21b) at the rear of the spindle (21), the restraining blade (18) is held by the pressing blade member (22). (1
It is designed to suppress and fix 9).

After constructing the reinforcing frame by the above-mentioned restraining shafts (18), (19), as described above, backfilling is performed in the space between the concrete skeleton wall surface (1a) and the lining wall by the lining panel (12). Material (25) (see FIG. 8)
Injection filling.

After the injection backing material (25) is cured and hardened, the holding blade members (22) of the fixing fittings (20) are loosened to remove the restraining rods (18) and (19), and further the stud bolts (11). ) Is folded at the cutting constriction portion (11b) to separate the knock-off portion (11a), and is removed together with the fixing metal fitting (20).

Finally, the adjacent lining panel (1
2) In the shallow groove portion formed in the joint portion between (12), that is, in the concave portion formed by the notch step portions (13) and (13), a strip-shaped joint covering material (corresponding to a cross-sectional shape) made of hard synthetic resin ( 14) (see FIGS. 5 and 8) is fitted and adhesively fixed, and the sealing piece fitting hole portion (15) of the mounting hole (15) is attached.
A hard synthetic resin sealing piece (24) of a corresponding shape (see FIGS. 3 and 8) is fitted into c) and fixed by adhesion. Then, if necessary, the joint covering material (14) and the blocking piece (24).
Complete the repair work by waterproofing the surrounding area with a sealant.

Therefore, the lining structure constructed as described above has a structure as shown in FIG. That is,
A large number of anchor bolts (2) are fixedly planted on a wall surface (1a) of the concrete body (1) of the liquid tank in a predetermined arrangement, and a rigid metal frame ( 7) is arranged, the metal frame body is fixed directly or indirectly to the tip of the anchor bolt (9), and a large number of hard synthetic resin plates are formed on the outer surface side of the metal frame body (7). The lining panels (12) are arranged side by side, and the lining panels (12) are fastened and fixed to the metal frame body (7) with bolts and nuts (11) and (17), and the body wall surface (1a) is also fixed. The backing material (25) is injected and filled and solidified in the space between the lining panel (12) and the lining panel (12).

FIG. 9 and FIG. 10 show an example of repair work for a concrete pipe according to the present invention.

In this case, the metal frame (37) and the lining panel (42) are the concrete frame (31) of the pipe ditch.
According to the diameter of, the curved shape divided into a plurality of segment units in the same direction is used. In addition, the concrete wall surface (31a) and the lining panel (4
Injecting and filling the backing material (55) into the space portion between 2) and, for example, after closing both ends of the annular space portion,
This can be done without trouble by pressure-injecting the backing material from the injection port provided in at least one or both of the end face closing members. Further, the reinforcing frame for restraint which is assembled on the panel surface prior to the filling and filling of the backing material (55) has a restraint shaft (48) such as a steel pipe as shown in a chain line in FIG. On the central part of (42), it is general to arrange the required number in parallel horizontally in the axial direction of the pipe.

Other matters are the same as in the case of the construction example of the embodiment shown in FIGS. 1 to 8, and the corresponding portions are designated by the same reference numerals, and the duplicated description will be omitted.

The preferred embodiment of the present invention has been described above. However, the present invention allows any design change without departing from the configuration described in the claims, and the embodiment of the embodiment shown in the drawings. It is not limited to the physical composition.

[0041]

According to the repair lining construction method of the present invention, the lining panels (12) (4) are preliminarily spaced from the concrete skeleton wall surfaces (1a) (31a) by a predetermined distance.
The lining wall according to 2) is constructed, and the lining wall is used as a formwork for the backing material and the backing material such as concrete (25)
Since the injection filling of (55) is performed, the material can be saved, the construction period can be shortened, and the labor can be reduced as compared with the case where the backing material is injected by forming a separate mold.

In addition, a metal frame integrally connected to the concrete skeleton (1) side such as a liquid tank by an anchor bolt (2) in the backfill material wall body newly formed by injecting the backfill material (25). Since the bodies (7) and (37) are buried, the strength of the whole of the liquid tank and the pipe can be significantly increased.

Further, since the inner surface of the body such as the liquid tank is covered with the lining wall of the lining panel made of hard synthetic resin, it can be repaired into a liquid tank or a pipe having a permanently excellent corrosion resistance. Since the lining wall can be made to have excellent surface smoothness, it can be made to have excellent flow-down characteristics without retention of the stored liquid in the tank such as sewage or the flowing liquid.

Also in the lining structure of claim 5 which is constructed by the lining method of the present invention, substantially the same effect as described above can be realized, and based on the restrictions described in other claims. The function and effect are as described in the description of the embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view showing constituent members used in a repair lining method of a concrete liquid tank according to the present invention in a separated state.

FIG. 2 is a perspective view showing a mounting state of a metal frame body.

FIG. 3 shows the state before mounting the lining panel, II in FIG.
It is sectional drawing shown in the part along the II line.

FIG. 4 is a front view of a lining panel.

5 is a cross-sectional view taken along line VV of FIG.

FIG. 6 is a perspective view showing a state in which a reinforcing frame is applied to the outer surface of the lining wall after the construction.

FIG. 7 is a front view showing a configuration example of a reinforcing frame.

FIG. 8 is a vertical cross-sectional view showing a state after completion of the repair lining structure.

FIG. 9 is a perspective view showing constituent members used in a repair lining method for a concrete pipe under a separated state.

FIG. 10 is a transverse cross-sectional view showing a state after completion of the repair lining structure of the concrete pipe.

[Explanation of symbols]

 1, 31 ... Concrete skeleton 1a, 31a ... Concrete skeleton wall surface 2 ... Anchor bolt 4 ... Frame body mounting plate 6 ... Stud bolt 7, 37 ... Metal frame body 10 ... Nut 11 ... Stud bolt 11a ... Knock-off part 11b ... Tightening for cutting Part 12 ... Lining panel 12a ... Panel body 12b ... Elastic thin plate 13 ... Notch step part 14 ... Joint covering material 16 ... Bolts / nuts 18, 19, 48 ... Restraining rod 20 ... Fixing metal fittings 25, 55 ... Backing material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuneji Minohe 590-13 Ogisaku, Ichihara City, Chiba Prefecture

Claims (7)

[Claims] 1. After removing a corrosion defect portion of a concrete skeleton wall surface of a liquid tank or the like, the substrate is adjusted, and a large number of anchor bolts are fixedly planted on the wall surface in a predetermined arrangement, and a predetermined interval is provided between the skeleton wall surface. A rigid metal frame body is arranged at a distance, and the metal frame body is directly or indirectly fixed using the anchor bolts, and then a large number of hard synthetic resin lining panels are arranged on the outer surface side of the metal frame body. The respective lining panels are arranged and fastened and fixed to the metal frame body with bolts and nuts, and then rod-like restraint boards are arranged on the outer surface side of the lining panel group in a grid-like arrangement or the like to lining them. After fixing with a fixing bracket on the panel surface, injecting and filling a backing material such as concrete into the space between the body wall surface and the lining panel, and after curing and curing the backing material, Tome棧 and renovation lining method concrete tank and Kanmizo like and removing the fixing bracket. 2. The concrete liquid tank, pipe ditch, etc. according to claim 1, wherein the lining panel is made of a hard synthetic resin panel main body and a cushioning elastic thin plate attached to the peripheral side surface of the panel main body. Lining method. 3. The height is adjusted by screwing an internal threaded cylinder portion having a frame mounting plate made of a metal plate of a predetermined size to the tip of the anchor bolt fixedly planted on the wall surface of the concrete skeleton to the bolt. 3. The concrete liquid tank and the pipe, etc. according to claim 1 or 2, wherein the metal frame body is freely attached and the level of the frame mounting plate is adjusted, and then the metal frame body is fastened and fixed to the mounting plate with bolts and nuts. Repair lining method. 4. A stud bolt for attaching a lining panel, which is fixed to a metal frame, has a constricted portion at an intermediate portion in the length direction, and a knock-off portion is provided on the tip side from the constricted portion. 4. The knurled part of the stud bolt is projected from above the panel surface after the lining panel is mounted and fixed, and the fixing metal fitting is mounted on the knockoff part to fix the restraint shaft. The relining lining method for concrete liquid tanks and pipes as described in 1 above. 5. A large number of anchor bolts are fixedly planted in a predetermined arrangement on a concrete wall surface of the liquid storage tank, and a rigid metal frame body is arranged at a predetermined distance from the wall surface of the body, and the metal frame is formed. The body is fixed directly or indirectly to the tip end portion of the anchor bolt, and a lining panel made of a large number of hard synthetic resin plates is arranged on the outer surface side of the metal frame body in a lined state, and the lining panel is A concrete liquid, which is fastened and fixed to a metal frame with bolts and nuts, and in which a backing material such as concrete is injected and filled and cured in the space between the body wall surface and the lining panel. Relining structure for tanks and pipes. 6. The relining lining structure for a concrete liquid tank, a pipe or the like according to claim 5, wherein the lining panel is made of a hard vinyl chloride resin. 7. The lining panel has a shallow step portion on the outer surface of the peripheral edge portion, and a band-like joint covering material having a corresponding cross-sectional shape is fitted over the adjacent step portions of the panel and is fixed by adhesion. Refurbished lining structure of concrete liquid tank and pipe as described in 6.