Abstract:
PROBLEM TO BE SOLVED: To easily and promptly detect rock mass deformation through visual recognition from a separated place and to eliminate time and efforts for special work such as installing a load detection device between a nut and a washer or the need to especially elongate a protruding length of an anchor material such as a lock bolt from a rock mass.SOLUTION: A rock mass deformation detection structure comprises: a lock bolt 11 which is installed in a rock mass 3 and provided with a male screw part 111 in the vicinity of an end of a portion protruding from the rock mass; a washer 12 which is extrapolated to the protruding portion of the lock bolt 11; and a nut 13 which is threaded with the male screw part 111 of the lock bolt 11 and presses the washer 12 to the side of the rock mass while being in contact with the washer 12. In a region on a nut-side surface 123 of the washer 12 which is not in contact with the nut 13, a coating 125 is provided which has a color different from that of a body 121 of the washer 12 and is exfoliated by deforming the washer 12 a predetermined amount or more.
Abstract:
PROBLEM TO BE SOLVED: To eliminate the need of heavy machines and wedges, to eliminate the need of installing/pulling out a mold form, to reduce work time/work days, and to efficiently and highly accurately correct track deviation.SOLUTION: A track deviation repair method for a track includes respective steps of: a) installing a plurality of anchors 28 for lift-up on an upper surface of a filling layer 4 for which a crosstie 2 and ballast 3 are solidified; b) installing a portal track lifting jig 10 which is supported at both ends by a ballast layer 3 on an outer side of the filling layer 4 and traverses a track 1 and the anchors 28; c) finely adjusting a track height by pulling up the anchors 28 with jacks 16 and 42 provided on the track lifting jig 10 and floating the filling layer 4 from the ballast 3; and d) packing a filler in a gap formed between the ballast 3 and the filling layer 4.
Abstract:
PROBLEM TO BE SOLVED: To provide a mounting structure for a tunnel interior panel in which concrete is prevented from being exfoliated from a concrete structure constituting a tunnel without requiring much costs and man-hours.SOLUTION: A mounting structure for a tunnel interior panel is provided for a concrete structure 1a constituting a tunnel and comprises a concrete anchor 34 which is fixed in a deep part of the concrete structure 1a. A tunnel interior panel 10 is mounted to the concrete structure 1a using the fixed concrete anchor 34. Furthermore, the deep part of the concrete structure is a position which is at least deeper than an outer surface s1 of a steel column 3a inside the concrete structure 1a, while defining a top surface of the concrete structure as a criterion.
Abstract:
PROBLEM TO BE SOLVED: To install a photovoltaic power generation panel to an existing sound insulating wall by simple work and at a low cost, and to provide the photovoltaic power generation panel which has sufficient resistance to wind loads and can be installed with high stability.SOLUTION: In an installation structure of a photovoltaic power generation panel body 41, a back surface of the photovoltaic power generation panel body 41 is bonded to a base surface 142 of an exterior plate 14 of a sound insulating wall, and an edge of the photovoltaic power generation panel body 41 is pressurized and fixed to the base surface 142 of the exterior plate 14 with a pressing clip 20. For instance, the photovoltaic power generation panel comprises the body 41 and nonwoven fabric 42 stuck to a back surface thereof, the nonwoven fabric 42 is bonded to the base surface 142 of the exterior plate 14, and an edge 421 projected to an outer periphery from the body 41 of the nonwoven fabric 42 is pressurized and fixed to the base surface 142 of the exterior plate 14 with the pressing clip 20.
Abstract:
PROBLEM TO BE SOLVED: To provide an earthquake strengthening structure for an existing building and a construction method for the same capable of: reducing labor of an anchor installation work to a skeleton; significantly decreasing noise as well as vibration while installing the anchor; and effectively constructing a partial opening and thereby significantly reducing a construction period.SOLUTION: An earthquake strengthening structure for an existing structure performs: to arrange and fix, with adhesive 80, a base plate 70 with first stud dowels 71 implanted therein on a peripheral surface of an opening section 20 of a skeleton 10; to arrange and fix a plate for a partial opening 50 to a position corresponding to a partial opening S for a passage way; to arrange an earthquake strengthening frame 40 with second stud dowels 43 implanted therein inside the opening section 20 at an inner side than the base plate 70; to connect the earthquake strengthening frame 40 and the plate for the partial opening 50 by arranging a cutting out portion 41b of the earthquake strengthening frame 40 at a corresponding position; to arrange reinforcement between an outer peripheral surface of the earthquake strengthening frame 40 and the skeleton 10; and to fill and solidify a consolidation material 61 so that the same embeds the stud dowels 71 and 43 as well as the reinforcement.
Abstract:
PROBLEM TO BE SOLVED: To prevent a capsule material from remaining between an anchoring material and a peripheral wall of an insertion hole midway through the insertion hole, when the anchoring material is infilled by breaking a capsule in the insertion hole by a shear reinforcement material.SOLUTION: A shear reinforcement structure for a concrete skeleton includes: a plurality of slot-like insertion holes 12 that are formed on a reinforcement surface 11 of a concrete skeleton 10; a rod-like shear reinforcement material 20 which is driven into each of the insertion holes 12; and an anchoring material 30 which flows out from a tubular capsule 35, disposed in the insertion hole 12, due to rupture caused by driving the shear reinforcement material 20, and which is infilled into a cavity between the insertion hole 12 and the shear reinforcement material 20. A head 22, the leading end of which is an approximately flat surface or an approximately spherical surface, is formed at the driving-direction leading end of the shear reinforcement material 20. A plurality of protrusions 24 protruding in a radial direction are formed at predetermined intervals in a circumferential direction on the head 22. A ruptured material 36 of the capsule 35 is disposed to be pushed into the inner part of the insertion hole 21.
Abstract:
PROBLEM TO BE SOLVED: To provide an expansion steel pipe lock bolt, which easily produces a sufficient frictional resistance to reliably reinforce natural ground, even such as soft bedrock, fractured bedrock, unconsolidated natural ground which are difficult to produce sufficient frictional resistance by expansion of a steel pipe.SOLUTION: When pressurized fluid is injected to a hollow steel pipe 2 to be inserted to a bored hole 31, the steel pipe 2 is allowed to expand so that an expansion steel pipe lock bolt 1 is anchored to natural ground 30 by peripheral surface friction with a hole wall 32. The expansion steel pipe lock bolt 1 is provided with the hollow steel pipe 2 of which surface has a plurality of regularly-arranged protrusions 5, preferably made from a steel plate material having a tensile strength of 400 to 510 N/mmand an elongation equal to or greater than 20%, having a striped pattern on the surface.