JP3845665B2 - Internal lining structure of concrete structure and internal lining method - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to an inner lining structure and an inner lining method for concrete structures such as manhole boxes, sewage treatment tanks, sewer pipes and the like.
[0002]
[Prior art]
As an inner surface lining structure of a concrete structure, a structure in which a lining material mounting frame is fixed to a concrete wall surface by applying an anchor bolt and a lining material is attached to the mounting frame is known (for example, Japanese Patent Laid-Open No. 10-316196). See the official gazette).
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the lining material is attached to the frame by applying the engaging means. Therefore, the frame must be provided with a notch portion as the engaging means with high accuracy. In addition to the high cost of the frame, it takes a lot of time to engage, so there is a problem that it takes a lot of work and time to install the lining material.
[0004]
Also, after lining material is laid, usually cement milk or the like is injected between the lining material and the concrete wall to integrate the concrete structure and the lining material. The lining material is deformed by the head pressure of the material. In order to prevent this deformation, it is necessary to take temporary deformation restraining means, so-called support work. In general, as shown in FIG. 13, the support work is performed by using a support material a ′ (rigid panel, loose square, etc.) and a support b ′ with a jack for taking a reaction force of the support material. In addition to the large amount of materials required, the jack b 'is particularly large and heavy, so it takes a lot of manpower and time to carry in, out, assemble and disassemble. In addition, since the support with jack is spanned between the opposing concrete walls, the work space is remarkably limited after the support work is performed, and the work must be suspended substantially until the support work is dismantled. There are many cases.
[0005]
An object of the present invention is to provide an inner lining structure of a concrete structure which is simple in structure and low in construction cost.
[0006]
Furthermore, the present invention provides an inner surface lining method for a concrete structure that can be carried out easily without applying a large and heavy material such as a jacked support in addition to simplifying the structure and reducing the construction cost. It was made for the purpose.
[0007]
[Means for Solving the Problems]
The present invention, lining material laid portion made of resin concrete walls covered with presence of backfill interval lining object, the lining material and / or the lining material groove portion formed on the seam of each other, the concave groove portion The present invention relates to an inner surface lining structure of a concrete structure, comprising a pressing member fitted therein and an anchor bolt for attaching and fixing the lining material to a concrete wall surface via the pressing member. In this case, to apply the mold steel as the pressing member, it is formed in the lining material of the head of the anchor bolt to be fixedly attached to the concrete wall surface of the lining material and / or the lining material cross seam through the mold steel and mold steel It is stored in the recessed groove. Moreover, a cover can be applied to the concave groove portion so as to conceal the concave groove portion.
[0008]
The present invention, all the peripheral surfaces, lining material laying part made the installed resin so as to cover and presence of backfill spacing of the concrete wall shape lined target cross section is closed, the lining material and / or the A ring-shaped concave groove formed so as to extend in the circumferential direction at the seam between the lining materials, and an assembly-type pressing member fitted in a ring shape in the concave groove. The present invention relates to an inner lining structure of a concrete structure. In this case, apply the type steels as a pressing member of the prefabricated, concave so as to conceal the mold steel with mold steel is accommodated in the lining material and / or the lining material is formed into mutual joint groove portion A cover can be applied to the groove.
[0009]
The present invention forms a lining material bottom part made of resin to cover the concrete walls of the lining object to exist a backfill interval step, the lining material and / or the groove portion of the formed seam of the lining material between within the fixed mounting step Komu fitting in the slit opening the pressing member in cross-section consisting of C shape of the mold steel is opened on the opposite side of the concrete wall, the lining material through a pressing member by applying an anchor bolt in the concrete wall A concrete structure comprising: a step of attaching a support material mounting tool that can be detached and attached through the slit portion of the pressing member; and a step of mounting and fixing the support material between the pressing members using the mounting tool. Related to the inner lining method.
[0010]
The present invention includes the steps of laying the entire peripheral surface of the concrete wall shape lined target cross section is closed, a resin lining material to cover to exist a backfill space, the lining material and / or the lining In a concave groove formed so as to extend in the circumferential direction at the seam between the materials, an assembling-type pressing member made of steel having a C-shaped cross section is opened by opening the slit opening on the side opposite to the concrete wall surface. Including a step of fitting in a state of being connected in a shape, a step of attaching a support material mounting tool that can be detached and attached through the slit portion of the presser member, and a step of attaching and fixing the support material across the presser member using the mounter The present invention relates to an internal lining method for a concrete structure.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. According to this embodiment, a lining material 1 has an anchor bolt in a concave groove portion 2 formed at an intermediate portion thereof via a pressing member 3 fitted into the concave groove portion 2. 4 is attached and fixed to the concrete wall surface a. The lining material 1 is made of a hard or semi-rigid plastic and has ribs 5 extending from one end to the other end on the back surface, and a large number of ribs 5 are provided at intervals. The recessed groove portion 2 extends in parallel with the rib 5 and is formed over the longitudinal direction of the lining material 1. It is sufficient that at least one concave groove portion 2 is formed on one lining material 1, but a plurality of concave groove portions 2 are formed when the width of the lining material is wide or the head pressure due to the backfilling material becomes high. Also good. The holding member 3 is made of metal or hard plastic, and usually C-type steel, L-type steel, groove-type steel or the like is applied in consideration of strength. In the mounted state, for example, when C-type steel is used as the pressing member 3, the slit opening 3a is opened on the side opposite to the concrete wall surface a. The anchor bolt 4 passes through the slit opening 3 a of the pressing member 3, penetrates the bottom surface portion 3 b, and is embedded and fixed in the concrete wall surface a, and the head of the bolt 4 is accommodated in the pressing member 3. The lining material 1 is attached and fixed to the concrete wall surface a by applying the above-mentioned attaching means while connecting the lining materials 1 and 1 to each other under the fitting of the concave and convex joint portions 6a and 6b formed on the connection end faces. Thus, the concrete wall surface a can be covered by the laying portion of the lining material 1 with the backfill interval b. The backfilling space 7 is filled with the backfilling material 7 after the lining material 1 is laid.
[0012]
FIG. 2 shows another embodiment of the present invention. In this embodiment, the recessed groove portion 2 is formed at a connecting portion between the lining materials 1 and 1. The lining material 1 is provided with an L-shaped edge portion 8 at a connection end portion, and a concave groove portion 2 is formed by abutment of the edge portions 8 and 8. It is preferable to provide a seal member 9 such as rubber packing in the recessed groove portion 2 in order to seal the butted portion of the edge portions 8 and 8. Other configurations are not substantially different from those of the embodiment shown in FIG.
[0013]
The rib 5 formed on the back surface of the lining material 1 may have a shape that physically adheres to the backing material when it is integrated with the backing material such as cement milk, for example, a shape such as an L shape or a T shape. Further, the structure of the connecting portion between the lining materials 1 is not particularly limited, but an uneven joint method formed on the end face as shown in FIG. 1 or an L-type formed on the end portion as shown in FIG. A method of overlapping edges can be applied.
When constructing an existing concrete structure, it is necessary to carry in from the manhole opening. Therefore, it is convenient that the width of the lining material 1 is about 600 mm at the maximum. Further, in the longitudinal direction, the lining material 1 is made of plastic and has an appropriate flexibility, so there is little restriction on the length. For example, the lining material 1 may be cut into a necessary length after being continuously carried in a long length. .
[0014]
In the present invention, the concavo-convex joint portions 6a and 6b of the lining material 1 of FIG. 1 are sequentially aligned with the construction surface a, or the edge portions 8 and 8 of the lining material 1 of FIG. The presser member 3 is fitted into the recess 2 while penetrating through the lining material using an anchor drill or the like, and then fixed with anchor bolts. Therefore, it is not necessary to attach a dedicated fixing bracket or the like at a predetermined position in advance, and the work is easy and at the same time can be reliably fixed to the concrete surface. In addition, it is preferable to open holes in the holding member 3 at an appropriate pitch in advance.
[0015]
In the present invention, as shown in FIGS. 3 and 4, a cover 10 can be applied to the recessed groove portion 2. FIG. 3 shows a case where the cover 10 is fixed by applying welding means after filling the groove portion 2 with a putty material 11 such as a rust prevention material. In this case, the lining material 1 and the cover 10 are made of the same material. Things are used. The space in the recess 2 is filled with a resin such as cement milk or epoxy using an inlet (not shown) provided in advance in the cover 10 after backfilling and removal of the support material described later. It may be injected. As shown in FIG. 4, the cover 10 may be applied by applying concave and convex portions 12a and 12b for fitting. In this case, the cover 10 is provided with a cover 10 to correct a dimensional error between the concave and convex portions 12a and 12b. The elastic part 10a can be formed. If these methods are applied, it is possible to cope with a slight shift in the mounting pitch of the lining material 1 or even if the lining material is disposed obliquely with a slight angle.
[0016]
1 to 4 show a situation where an inner lining is applied to a flat concrete wall surface a, but the concrete wall surface is curved as in the case of a pipe having a circular cross section made of concrete. Also, the inner lining structure of the present invention can be applied. When the lining material 1 is arranged in the circumferential direction, the lining material 1 is flexible and follows the rounded surface of the wall surface. However, the pressing member 3 is curved in advance so as to be along the concrete wall surface, for example, divided into three parts. Other configurations are not substantially different from those of the previous flat configuration.
Further, the lining material 1 may be arranged in the tube axis direction to finish a polygonal cross section.
[0017]
FIG. 5 shows an example in which the lining method of the present invention is applied to a concrete wall surface a having irregularities caused by corrosion or the like. In this case, spacer members 18 are attached to the concrete wall surface a at an appropriate interval for the purpose of leveling the unevenness or increasing the thickness of the backfill material in order to increase the strength of the concrete frame. A lining material 1 is laid along a at a backfill interval b. The attachment means shown in FIGS. 1 and 2 is applied to this laying. Although various cross-sectional shapes can be used as the spacer member 18, the spacer member 18 can also be used as a reinforcing member for increasing the strength of the concrete frame.
Although the lining material 1 may be attached in the longitudinal direction or the circumferential direction, FIG. 5 shows an example in which the lining material 1 is attached in the circumferential direction. Further, the four corner portions may be fused or bonded by superimposing L-shaped cross-sections of the same kind of material as the lining material by welding the lining materials together.
[0018]
In sewer pipes, the concrete wall surface forming the inner peripheral surface may have a circular, horseshoe-shaped, rectangular or other cross-sectional shape. For example, in a relatively small pipe having an inner dimension of about 1000 mm to 2500 mm, the back-filling head pressure at the time of backfilling is small, so the presser member 3 is fitted into the concave groove portion 2 of the lining material 1 and the concrete wall surface is anchored with an anchor bolt. Instead of attaching and fixing to, an assembly-type ring-shaped pressing member 31 can be used. FIG. 6 shows an example in a circular cross section, and the three-part holding member 31 is fitted in the concave groove portion 2 of the lining material 1 in a state of being rigidly connected with a bolt or the like at the connection portion 32. Incidentally, the recessed groove portion 2 extends continuously over the entire circumference in the circumferential direction of the concrete wall surface. Similarly, FIG. 7 shows an example in a horseshoe cross section, and an assembly-type ring-shaped pressing member 41 is rigidly connected at a connection portion 42. 8 and 9 show the rings 33 and 43 after the pressing members 31 and 41 are assembled. Since the pressing member is connected in a ring shape, it has rigidity against the load, and plays a role of replacing the anchor bolt. The pressing member can be made of steel having various cross sections in consideration of strength. However, when using steel having a C-shaped cross section, the slit opening is opened on the side opposite to the concrete wall surface a. The division position and the number of divisions of the pressing member can be appropriately determined according to the cross-sectional shape and dimensions of the pipe line. In addition, you may use an anchor bolt together as needed. Further, as shown in FIG. 5 described above, a spacer may be provided for the purpose of leveling the unevenness of the concrete wall surface or increasing the back-in thickness.
[0019]
As described above, when the cross section of the pipe is relatively small, the method of the previous section has a relatively low strength as a ring when the backfilling head pressure is small or when a holding member having the same cross sectional strength is used. It is particularly effective because it becomes very high. Moreover, since it is not necessary to fix the anchor bolt in the small cross-section pipe line, the workability is excellent. In the embodiment shown in FIGS. 1, 2, 3, 4, and 5, the presser member 3 is fitted into the recessed groove portion 2 and fixed to the concrete wall with an anchor bolt. Although the point which uses the members 31 thru | or 41 differs, it is substantially the same about others.
[0020]
According to the lining structure of the present invention, the lining material 1 is attached and fixed to the concrete wall surface with an anchor bolt via the pressing member 3, or the pressing members 31 to 41 are fitted in the recessed groove portion 2 in a ring shape. Because of the fixing, deformation of the lining material 1 due to the backfilling head pressure when backfilling is performed at the backfilling interval b is relatively difficult to occur. However, when the backfill head pressure is high, when it is necessary to minimize deformation, or when reducing the thickness of the lining material in order to reduce the cost of the lining material 1, etc. There is. In the lining method of the present invention, a temporary support work can be easily applied to the laying portion of the lining material 1 prior to backfilling in order to suppress deformation of the lining material 1 due to the head pressure of the backfilling material to a minimum. it can. At the time of the construction of the support work, first, the support member attaching tool 13 is attached and fixed in the pressing member 3 or 31 to 41, for example, two attaching tools 13 facing each other between the two parallel pressing members 3, 3. , 13 is fixed to the support member 14 in an erected state. Supporting work can be performed by performing such mounting and fixing of the support material 14 in multiple stages as shown in FIG. It should be noted that the mounting pitch of the support material 14 is appropriately determined according to the strength of the lining material 1 and the backfill head pressure.
[0021]
Details of the mounting portion of the support member 14 are shown in FIG. The fixture 13 is plate-shaped, and includes an insertion portion 13a having a size and shape substantially equal to the inner cross-sectional shape of the C-type pressing member 3 at the bottom, and the insertion portion 13a is inserted into the pressing member 3 through the slit opening 3a. Thereafter, it can be fixed to the holding member 3 by being rotated by 90 °. The attachment 13 includes an attachment plate portion 13b in the upper half, and a first attachment hole 15 is formed in the attachment plate portion 13b.
[0022]
The support member 14 has second mounting holes 16 at both ends, and is supported by applying a connecting metal fitting 17 such as a connecting pin or a bolt and nut in a state where the first and second mounting holes 15 and 16 are aligned. The material 14 can be attached and fixed across the fixtures 13 and 13. As shown in FIG. 11, both ends of the support member 14 may have a bifurcated configuration, and the support plate 14 may be coupled with the attachment plate portion 13 b inserted between the bifurcated portions 14 a. The first and second mounting holes 15 and 16 may be long holes so that the coupling bracket 17 can be smoothly coupled to a dimensional error in the mounting pitch of the mounting tool 13. Further, for example, the portion corresponding to the first mounting hole 15 of the fitting 17 is eccentric S, so that if the lever 19 is rotated, the support material 14 moves in the vertical direction with respect to the lining material 1. 14 can be brought into close contact with the lining material 1 accurately.
In addition, after the back filling, a load corresponding to the back filling head is applied to the support material 14 via the lining material 1, so that it becomes difficult to pull out the coupling metal 17. If it is eccentric, the load can be easily released by operating the lever 19 and the coupling fitting 17 can be pulled out.
The material of the support material 14 is not particularly limited as long as it is rigid, such as metal or plastic. For example, in the case of plastic, reinforcing ribs 14b may be formed on the support material 14 as shown in FIG. it can. At the time of dismantling of the support work, the fitting 17 is removed, the support material 14 is removed, the attachment 13 is rotated 90 °, and the insertion part 13a is made parallel to the slit opening 3a and then extracted.
[0023]
When performing backfilling, if there is a large amount of backfilling material to be constructed, or if the backfilling is too large when the backfill filling is large at a time, backfilling is performed in multiple steps. It can be carried out. In the method of the present invention, the support material 14 can be easily detached. Therefore, if the support material 14 is sequentially moved upward after waiting for the backfill material to harden, the work can be performed with a small number of support materials 14. can do.
[0024]
The support material 14 of the present invention is small and light, and can be used in common regardless of the construction conditions and the shape and dimensions of the concrete structure to be constructed. Excellent transportability and installation on the construction site.
Furthermore, in the case of the conventional support method, the types, dimensions, and quantities of support materials and accessory parts are examined and prepared in advance according to the construction conditions and the shape and dimensions of the concrete structure to be constructed. However, since the single support material 14 is used in the method of the present invention, it is not necessary to consider and plan them, and the cost and labor can be reduced.
[0025]
【The invention's effect】
According to the lining structure of the present invention, the lining material is attached and fixed to the concave groove portion with the anchor bolt via the pressing member, or the assembly type pressing member is fitted and fixed to the concave groove portion in a ring shape. Therefore, there is a feature that the inner lining construction can be easily and inexpensively performed without requiring complicated labor such as the use of an expensive member requiring high-precision processing and the engaging operation.
Furthermore, according to the lining method of the present invention, the construction of the inner lining can be easily constructed and the reaction force of the support material is taken from the pressing member, so that a large and heavy material such as a support with a jack can be used. The application is no longer necessary, and the labor required for loading, unloading, assembling, and dismantling of materials can be significantly reduced, and there is no need to bridge a jacked support between concrete walls, so that the work space is not substantially hindered. Other work can be continued without hindrance while the support work is performed.
[Brief description of the drawings]
FIG. 1A is a partial sectional view showing an embodiment of an inner surface lining structure of the present invention. (B) It is an enlarged view of a ditch | groove part.
FIG. 2A is a partial cross-sectional view showing another embodiment of the same. (B) It is an enlarged view of a ditch | groove part.
FIG. 3 is a cross-sectional view showing a situation where a cover is applied to a concave groove.
FIG. 4 is a cross-sectional view showing a modified example.
FIG. 5 is a partially longitudinal perspective view schematically showing one implementation state of the inner surface lining method of the present invention.
FIG. 6 is a cross-sectional view showing one embodiment in a circular cross section.
FIG. 7 is a cross-sectional view showing one embodiment in a horseshoe-shaped cross section.
FIG. 8 is a front view showing a circular assembly-type ring-shaped pressing member.
FIG. 9 is a front view showing a horseshoe-shaped assembled ring-shaped pressing member.
FIG. 10A is a partial longitudinal sectional view showing a mounting state of the support material. (B) It is an enlarged view of an attachment part.
11 is a cross-sectional view taken along the line AA in FIG. 6. FIG. 12 is a cross-sectional view taken along the line BB in FIG.
FIG. 13 is an explanatory view showing an example of a conventional support work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lining material 2 Concave groove part 3 Holding member 3a Slit opening 4 Anchor bolt 5 Rib 6a Convex joint part 6b Concave joint part 7 Backfill material 8 Edge part 9 Seal member 10 Cover 11 Putty material 12a Convex part 12b Concave part 13 Support material attachment tool 14 Support material 15 1st mounting hole 16 2nd mounting hole 17 Joint metal fitting 18 Spacer member 19 Lever 31 Circular rigid member 32 Same as above Clamping part 33 Circular rigid ring 41 Horseshoe-shaped rigid member 42 Same as above Clamping part 43 Horseshoe-shaped rigidity ring

Claims (6)

Lining material laying portion made of resin concrete walls covered with presence of backfill interval lining object, the lining material and / or the lining material groove portion formed on the seam of one another, are incorporated fitted in recess in the groove An inner surface lining structure for a concrete structure, comprising a pressing member and an anchor bolt for attaching and fixing the lining material to a concrete wall surface via the pressing member. The installed lining material laid unit made of resin so as to cover the entire peripheral surface of the concrete wall shape lined target cross section is closed by presence of the backfill space, the lining material and / or the seam of the lining material mutually A concrete structure comprising a ring-shaped concave groove portion formed so as to extend in the circumferential direction, and an assembly-type pressing member fitted in a ring shape in the concave groove portion Internal lining structure of objects. A type-steel as the pressing member is applied, the head of the anchor bolt which attaching and fixing the resin lining material in the concrete wall through the mold steel and mold steel formed in the lining material and / or seams of the lining material mutually together they are housed in the groove portion, wherein the cover the groove portion is subjected to the lining material through the mold steel and mold steel for concealing the anchor bolt mounted and fixed to a concrete wall according Item 6. An inner lining structure according to Item 1. Applies rolled steel as the pressing member of the assembled, in a ring mold steel resin lining material and / or the lining material mutual seam circumferentially formed so as to extend a ring-shaped groove portion The inner lining structure according to claim 2, wherein the inner lining structure is housed in a connected state and a cover is applied to the concave groove portion so as to conceal the steel plate. Forming a lining material laying portion made of resin so as to cover the concrete walls of the lining object to exist a backfill space, the lining material and / or the lining material in the groove portion of the formed seam between, the cross-section process step of the slit opening the pressing member comprising a C shape of the mold steel Komu fitted by opening on the opposite side of the concrete wall, the lining material through a pressing member by applying an anchor bolt to the mounting fixed to the concrete wall, pressing An inner lining method for a concrete structure, comprising: a step of mounting a support material mounting tool that can be attached and detached through a slit portion of the member; and a step of mounting and fixing the support material across the pressing member using the mounting tool. . The entire peripheral surface of the concrete wall shape lined target cross section is closed, the step of laying a resin lining material to cover to exist a backfill space, the joint between the lining material and / or the liner bag In an indented groove formed so as to extend in the circumferential direction, an assembly-type pressing member made of steel having a C-shaped cross section was connected in a ring shape with its slit opening being opened to the side opposite to the concrete wall surface. Including a step of fitting in a state, a step of mounting a support material mounting tool that can be detached through the slit portion of the pressing member, and a step of mounting and fixing the support material across the pressing member using the mounting tool. Internal lining method for concrete structures.

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