JP2005139816A - Lining construction method of structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce repairing work, by smoothing flowing-down of water in a shield tunnel, by easily preventing breaking or deformation of a lining layer by water leakage after completing construction, in a lining construction method as secondary lining of an underground structure such as the shield tunnel. <P>SOLUTION: This structure is constituted by connecting a plurality of segments 2, 2, etc. The lining construction method of the structure forms the lining layer 13 by applying a coating film material to a surface of the structure. The lining construction method of the structure is provided so that a recessed groove 12 is arranged in joint parts 2a and 2a of the segments 2 and 2; the lining layer 13 is formed by injecting the coating film layer by a predetermined quantity toward a surface of the segments 2 and 2 and an opening part of the recessed groove 12; and isolated parts 14 and 14 becoming an unformed part of the lining layer 13, are formed in a side edge part of the recessed groove 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lining method for a structure, and in particular, in a lining method as a secondary lining for an underground structure such as a shield tunnel, it is easy to break or deform a lining layer due to water leakage after completion of construction. The present invention relates to a lining method for a structure that is prevented by the above.

  Conventionally, a lining method for such a structure will be described with reference to FIGS. In FIG. 3, 1 indicates a structure as a primary lining to be assembled for constructing a shield tunnel, and the structure 1 has a plurality of segments 2, 2. A plurality of the segments 2, 2... That are formed in a ring shape are assembled in the tunnel axial direction, and the segments 2, 2,. ... is opened. The grout holes 3, 3... Are closed by a closing member, a caulking material, etc. after injecting the grout from the grout holes 3, 3.

  FIG. 4 is an enlarged view of the joint portions 2a and 2a extending in the axial direction of the segments 2 and 2. The joint portions 2a and 2a are appropriately fastened with bolts or the like (not shown), and The concave grooves 4, 4 are formed at predetermined positions of the two joint portions 2 a, 2 a so as to face each other and the opening portions substantially match, and the flexible waterproof seal 5 is formed in the concave grooves 4, 4. Is configured to be pressed and inserted.

  Further, in the joint portions 2a and 2a in the vicinity of the inner peripheral surface of the segments 2 and 2, the joint portions 2a and 2a are notched, and concave grooves 6 extending in the axial direction are formed. In addition, although illustration is abbreviate | omitted, the said ditch | groove 4 and this ditch | groove 6 are formed also in the joint parts 2a and 2a extended in the circumferential direction of the said segments 2 and 2. FIG.

  In FIG. 5, 7 is a shield tunnel of an underground structure, and after the excavation of a natural ground 8, the shield tunnel 7 joins the joint portions 2a, 2a ... as a primary lining. In addition, a plurality of the waterproof waterproof seals 5, 5... Are loaded into the concave grooves 4, 4... In a pressure contact state and assembled into a ring shape, and the ring-shaped segments 2, 2. Are assembled into a cylindrical shape.

  Further, after the concave grooves 6, 6 ... formed in the joint portions 2a, 2a ... of the segments 2, 2 ... are filled with caulking materials 9, 9 ..., the segment 2, 2. A primer (not shown) is applied to the inner peripheral surface of 2 ..., and a coating material such as polyurethane or epoxy excellent in waterproofness, corrosion resistance, etc. is sprayed on the primer to a thickness of about 2 to 3 mm. 10 is formed and a so-called lining method is applied.

  Similarly to the above, Patent Document 1 and Patent Document 2 show a method for constructing a lining.

  That is, Patent Document 1 describes an outer surface resin-coated segment for a shield tunnel in which a resin coating layer is formed so as to cover the outer surface and all joint surfaces of a concrete segment.

  And in this patent document 1, in order to save the material cost of a resin coating layer, the method of apply | coating a resin coating layer to the ditch | groove which is a part of junction part is also described.

Patent Document 2 discloses a resin film segment composed of a bottom mold having a curved surface, a side mold movable along the bottom mold, and an upper mold having a concrete injection hole. A mold for production is prepared, a resin member having at least one curved surface is installed on the inner peripheral surface of the mold, and a curable adhesive that can be bonded to the surface of the resin member in water or in a wet state When the curable adhesive is in an uncured or semi-cured state, a reinforcing bar, a bolt box, or a grout hole metal fitting is installed as necessary, and concrete is placed in the mold. A method for producing a resin-coated segment is described.
Japanese Patent No. 2955270 Japanese Patent Laid-Open No. 11-270290

  As shown in FIG. 6A, the shield tunnel 7 constructed by the above-described lining method is constructed such that, for example, water leakage W from the ground 8 after completion of construction is lined with the segment 2 through the grout hole 3 of the segment 2. If it enters between the layers 10 and peels off and accumulates the lining layer 10, the lining layer 10 may be deformed S due to swelling.

  In this case, even if the water leakage W is removed, the lining layer 10 has undergone creep deformation, so the deformation S does not return to its original state, and the inner surface of the shield tunnel 7 is smoothed by the deformation S. The property is lowered, and the natural flow of the internal water after the use of the shield tunnel 1 is inhibited.

  Therefore, the deformed S lining layer 5 is cut as shown in FIG. 6B, and the cut lining layer portion is repaired by performing lining construction again with the applicator 11 as shown in FIG. 6C. Although it is performed, the repair has a problem that it takes a lot of time and cost and the construction cost increases.

  Further, water leakage from the natural ground 8 also occurs from the joint portion 2a of the segment 2, and in this case, there is the same problem as described above.

  Furthermore, the outer surface resin-coated segment for shield tunnel described in Patent Document 1 and the resin-coated segment described in Patent Document 2 also penetrate water into the concrete and the resin coating film, There is a risk of damage.

  Therefore, in the lining method as a secondary lining for underground structures such as shield tunnels, it is easy to prevent the lining layer from being damaged or deformed due to water leakage after completion of construction, and to smoothly flow down the inner water flow of the shield tunnel. At the same time, technical problems to be solved in order to reduce repair work and the like arise, and the present invention aims to solve these problems.

  The present invention has been proposed to achieve the above object, and the invention of claim 1 is a structure formed by joining a plurality of segments, and a coating material is provided on the surface of the structure. In a lining method for a structure that is applied to form a lining layer, a concave groove is provided in the joint portion of the segment, and a predetermined amount of the coating material is sprayed toward the surface of the segment and the opening of the concave groove. Thus, a lining method for a structure is provided, in which a lining layer is formed and an edge cut portion is formed on a side portion of the concave groove where the lining layer is not formed.

  According to the first aspect of the present invention, the edge cut portion of the lining layer can be easily formed in the step of forming the lining layer, and the leaked water that has penetrated into the joint portion of the segment is smoothed by the edge cut portion. Can be discharged.

  According to a second aspect of the present invention, there is provided a structure constituted by joining together a plurality of segments having grout holes formed at predetermined positions, and a coating material is applied to the surface of the structure to form a lining layer In the lining method of the structure for forming the structure, a temporary cover having a larger diameter than the grout hole is attached on the grout hole at a predetermined interval, and the coating material is directed toward the segment surface and the temporary cover. There is provided a lining method for a structure in which a predetermined amount is sprayed to form a lining layer, and an edge cut portion is formed on a segment surface below the temporary lid where the lining layer is not formed.

  According to the second aspect of the present invention, the edge cut portion of the lining layer can be easily formed in the vicinity of the grout hole in the step of forming the lining layer, and the water leaked into the grout hole by the edge cut portion. Can be discharged smoothly.

  According to a first aspect of the present invention, in the lining method for a structure, a groove is provided in a joint portion of a segment, and a predetermined amount of coating material is injected toward the surface of the segment and the opening of the groove. In addition to forming a lining layer, an edge cut portion is formed on the side of the concave groove where the lining layer is not formed. Therefore, the edge cut portion of the lining layer is easily formed in the step of forming the lining layer. The edge breakage can smoothly discharge the water leaked into the joint portion of the segment, and the lining layer can be easily prevented from being broken or deformed. Accordingly, it is possible to smoothly flow the internal water in the shield tunnel and reduce repair work and the like.

  According to a second aspect of the present invention, in the lining method for a structure, a temporary cover having a larger diameter than the grout hole is attached to the grout hole at a predetermined interval, and the segment surface and the temporary cover are faced. Easily in the process of forming the lining layer because a predetermined amount of coating material is sprayed to form a lining layer and a segmented portion that does not form the lining layer is formed on the segment surface below the temporary lid. The edge of the lining layer can be formed in the vicinity of the grouting hole, and the leakage of water that has entered the grouting hole can be smoothly discharged by the edge cutting, and the lining layer can be easily prevented from being broken or deformed. it can. Therefore, it is possible to smoothly flow down the inner water of the shield tunnel and reduce repair work and the like.

  In the lining method as a secondary lining of underground structures such as shield tunnels, it is easy to prevent the lining layer from being damaged or deformed due to water leakage after the completion of construction, and to smoothly flow down the inner water flow of the shield tunnel, The purpose of reducing repair work etc. is to form a concave layer in the joint part of the segment, or by attaching a temporary lid with a larger diameter than the grout hole at a predetermined interval on the grout hole, the lining layer is not formed This was achieved by forming a parted edge.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. For convenience of explanation, the same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted. In FIG. 1A, reference numeral 12 denotes a concave groove formed so that the inner end portions of the joint portions of the segments 2 and 2 adjacent to each other are notched and open toward the inner side. As shown in the figure, the concave groove 12 is preferably formed such that the width H of the opening 12a opened inward (in the axial direction of the structure) is narrower than the groove width in the vicinity of the opening 12a. However, the present invention is not limited to this, and the groove may be formed to have substantially the same width as the groove near the opening 12a. And the same ditch | groove 12 is formed also in the joint part of the other segment which is not shown in figure.

  Thus, when the coating material is sprayed radially from the inside of the segments 2 and 2 (on the axial center side of the structure), as shown in FIG. A lining layer 13 is formed at the bottom of the concave groove 12, but portions where the lining layer is not formed, that is, edge cut portions 14, 14 are formed at the side edges of the concave groove 12.

  The lining layers 13, 13... And the edge cut portions 14, 14... Are formed in the other segments 2, 2.

  Next, after the lining layers 13, 13... Are cured, as shown in FIG. 3C, the groove 12 has wettability such as caulking material, resin molded product, or resin mole. In addition, the flexible filler 15 is applied to close the concave groove 12. Similarly, the other concave grooves 12, 12... Are closed.

  Therefore, after the fillers 15, 15... Are applied to the concave grooves 12, 12,..., Water leaked into the joint portions 2a, 2a. When entering the ..., after passing through the bottom of the lining layers 13, 13 ... formed on the bottom of the concave grooves 12, 12, ..., leaking out from the edge cuts 14, 14 ..., the edge cuts 14, 14 ... Are passed through the side surfaces of the fillers 15, 15..., Or are inserted into the fillers 15, 15. .

  On the other hand, the inner water in the segments 2, 2... Is sealed by compressing the fillers 15, 15... By the pressure of the inner water, and almost no water leaks to the ground.

  Thus, the concave grooves 12, 12,... Formed by the lining method of the structure of the present invention efficiently leak water from the natural ground side by the edge cut portions 14, 14,. Therefore, there is no risk of the lining layers 13, 13... Being broken or deformed, so that the inner water flow in the shield tunnel can be made smooth, and repair work and the like can be reduced. Can do. The edge cut portion 14 can be formed very easily.

  In FIG. 2A, reference numeral 16 denotes a grout cap for closing the grout hole 3 opened in the segment 2, and the grout cap 16 is screwed into the grout hole 3 and the grout hole 3. And protrudes inward from the grout hole 3 at a predetermined height (in the axial direction of the structure), and as shown in FIG. A large-diameter umbrella-shaped temporary lid 17 is attached at a predetermined distance from the grout hole 3. The temporary lid 17 is formed of an appropriate material such as paper, synthetic resin, metal, and the like, and is attached to the grout cap 16 by an appropriate method such as an adhesive or a double-sided adhesive tape.

  Further, similar temporary lids 17, 17... Are attached to other grout holes 3, 3.

  Thus, when the coating material is sprayed radially from the axial side of the structure toward the segment 2 and the temporary lid 17, the inner peripheral surface of the segment 2 and the temporary lid 17 are shown in FIG. Lining layers 13 and 13 are formed on the upper surface of the rim, but the coating material is not sprayed on the inner peripheral surface of the segments 2, 2. The edge cut part 18 used as the part which is not formed is formed. Further, the lining layers 13, 13... Are similarly formed on the inner peripheral surfaces of the other segments 2, 2,.

  Next, as shown in FIG. 3C, the temporary lid 17 is removed, and after the temporary lid 17 is removed, filling with a filler 15 is performed.

  Accordingly, after the filler 15 is applied to the grout hole 3, the water leaked into the grout hole 3 from a natural ground passes between the outer surface of the grout cap 16 and the inner peripheral surface of the grout hole 3. It passes between the edge cut portion 18 and the filler 15 and is discharged to the inside of the segment 2. On the other hand, the inner water inside the segment 2 is sealed by compressing the filler 15 with the pressure of the inner water, and there is almost no water leakage to the natural ground side.

  Thus, the grout hole 3 formed by the lining method of the structure of the present invention can smoothly discharge the water leaked from the natural ground side to the inside of the segment 2 by the edge cut portion 18. Therefore, the lining layer 13 is not broken or deformed by the above, and therefore the flow of the inner water in the shield tunnel can be made smooth, and repair work and the like can be reduced. The edge cut portion 18 can be formed very easily.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

(A) The perspective view of the ditch | groove vicinity which showed one Embodiment of this invention and assembled and formed the segment. (B) The perspective view of the ditch | groove vicinity which showed one Embodiment of this invention and the lining layer was formed. (C) The perspective view of the ditch | groove vicinity which shows one Embodiment of this invention and shows the state by which the filler was constructed by the ditch | groove. (A) The perspective view of the grout hole vicinity which shows one Embodiment of this invention and shows the state by which the grout hole was obstruct | occluded with the grout cap. (B) The perspective view of the grout hole vicinity which shows one Embodiment of this invention and shows the state which attached the temporary cover to the front-end | tip of the grout cap. (C) The perspective view of the grout hole vicinity which shows one Embodiment of this invention, removes a temporary cover, and shows the state which obstruct | occluded the grout hole vicinity with the grout material. The perspective view of the structure which showed the prior art example and assembled and comprised the segment. The longitudinal cross-sectional view of the joint part vicinity of a segment which shows a prior art example. The front longitudinal cross-sectional view of a shield tunnel which shows a prior art example. (A) The partial longitudinal cross-sectional view of the shield tunnel which shows a prior art example and shows a water leak state. (B) The partial longitudinal cross-sectional view of the shield tunnel which shows the state which cut the lining layer of previous figure (a). (C) The partial longitudinal cross-sectional view of the shield tunnel which shows the state which repairs the lining layer of previous figure (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Structure 2 Segment 2a Joint part 3 Grout hole 12 Groove 12a Opening part 13 Lining layer 14,18 Edge cut part 17 Temporary cover

Claims (2)

  In a lining method for a structure in which a plurality of segments are joined together and a coating material is applied to the surface of the structure to form a lining layer, the joints of the segments are recessed. Providing a groove, spraying a predetermined amount of the coating material toward the segment surface and the opening of the concave groove to form a lining layer, and a portion where the lining layer is not formed on the side of the concave groove; A lining method for a structure characterized by forming an edge cut portion.   In a lining method for a structure in which a plurality of segments each having a grout hole formed at a predetermined position are joined together, and a coating material is applied to the surface of the structure to form a lining layer. A temporary lid having a larger diameter than that of the grout hole is attached on the grout hole, and a predetermined amount of the coating material is sprayed toward the segment surface and the temporary lid to form a lining layer. In addition, a lining method for a structure is characterized in that an edge cut portion which is a portion where the lining layer is not formed is formed on a segment surface below the temporary lid.

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