JP2008095385A - Ditch cover mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ditch cover mounting structure which is set up such that a ditch cover has one end thereof connected to a building such as an aseismically seismically isolated building and a free end thereof fixed to the ground adjacent to the building via a ditch, and that the ditch cover is slidably borne by a wide bearing frame, wherein the ditch cover mounting structure facilitates welding work between reinforcements arranged side by side on a lower surface of the bearing frame and joint bars projecting from a concrete skeleton of the ground, and facilitates pouring of concrete in every corner under the bearing frame. <P>SOLUTION: The bearing frame 17 is formed of an L-shaped cross-sectional plate member 13, a plate member 14 having one end thereof inclined in a diagonally outward direction as an inclined bearing end 14a, and the T-shaped cross-sectional reinforcements 15 connecting between both the plate members 13, 14 at suitable intervals in a longitudinal direction. Then clearances between the reinforcements are secured as openings 16 for pouring concrete. To mount the ditch cover to the ground 13, while the bearing frame 17 is borne, the joint bars 19 projecting from the concrete skeleton 18 through the openings 16, and the reinforcements 15 are welded and fixed together, and the concrete is poured from a gap between the plate member 14 and the concrete skeleton 18 and the openings 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a groove lid mounting structure installed in a groove formed around a building such as a building that is seismically isolated.

  In buildings such as buildings that are seismically isolated, there are grooves around them to absorb the shaking of the building during the earthquake, and groove covers are installed in the grooves for pedestrians and vehicles. is there. Such groove lids need to be able to cope with changes in groove width during an earthquake. Therefore, in Patent Document 1 shown below, as shown in FIGS. 1 and 2, an angle-shaped receiving frame 1 is fixed to the building A, and a wide receiving frame 2 is attached to the ground B adjacent to the building A via the groove D. The free end side of the groove lid 3 having one end connected to the receiving frame 1 is placed on the receiving frame 2 so that the free end side of the groove lid 3 can slide on the receiving frame 2 when the groove width changes during an earthquake. When the groove width becomes narrower, as shown in FIG. 3, the inclined edge 4 provided at the free end of the groove lid comes into contact with the inclined receiving edge 2a at the end of the receiving frame 2 and rides on the ground B. Further, a joint cover device is disclosed in which a cover plate 5 is mounted on the end of the ground plate B.

The construction of the receiving frames 1 and 2 on the building A and the ground B is adjusted from the height of the receiving frames 1 and 2 as shown in FIG. The anchor 7 fixed to the receiving frame 1 is attached to the insertion bar 6 by welding, or the anchor 9 fixed to the receiving frame 2 and the anchor 9 fixed to the receiving frame 2 are protruded from the ground B at appropriate intervals in the longitudinal direction of the lower surface of the receiving frame 2. Reinforcing material 10 arranged in parallel to the longitudinal direction is attached by welding, and then the concrete is placed between the concrete frame of building A and the receiving frame 1 and between the concrete frame of ground B and the receiving frame 2 in the direction of the arrow. Had been laid. FIG. 5 shows a cross-sectional structure after construction, and in the figure, 11 indicates a cast concrete layer.
JP-A-10-317516

  Since the receiving frame 2 described above is formed to be wide so that the sliding of the groove lid 3 can be ensured, it is possible to fill the corner of the frame 2 with the concrete from the gap between the concrete frame of the ground B and the receiving frame 2. It was not easy and the construction was difficult, and it was more difficult to weld the reinforcing material 10 on the lower surface of the receiving frame and the reinforcing bar 8 as the reinforcing material 10 was deeper in the receiving frame 2.

  A first object of the present invention is to provide a groove lid mounting structure in which concrete for easily fixing a receiving frame on which a groove lid slides can be fixed to a building or a ground around the building, A groove cover attached by welding with a reinforcing member arranged in parallel at an appropriate interval on the lower surface in the longitudinal direction of the receiving frame on which the groove cover slides, and a reinforcing bar protruding from the ground around the building or the building. In the mounting structure, the second object is to facilitate the placement of concrete and the welding work of the reinforcing material and the reinforcing bar.

  The invention according to claim 1 is a groove lid mounting structure that is installed in a groove that is formed around a building such as a building that is seismically isolated to absorb shaking of the building during an earthquake, A first receiving frame that is fixed to one of the building and the ground adjacent to the building via a groove and to which one end of the groove lid is connected, and is fixed to the other of the building and the ground. The free end side of the groove cover is slidably mounted on the second receiving frame, and of the first and second receiving frames, at least the second receiving frame includes the building or the ground. In the groove lid mounting structure in which concrete is placed therebetween, the second receiving frame is formed with one or more openings for placing concrete.

The invention according to claim 2 is the invention according to claim 1, wherein the second receiving frame is provided on the building or the ground at an appropriate interval in the longitudinal direction of the bottom surface of the receiving frame, with the reinforcing bar projecting from the building or the ground. It is fixed by welding the reinforcing members arranged side by side, characterized in that an opening for placing concrete is formed along the reinforcing material in the receiving frame between the reinforcing materials,
According to a third aspect of the present invention, the second receiving frame of the second aspect of the invention comprises a plate material extending in the longitudinal direction with a certain interval, and a reinforcing material for fixing both plate materials at an appropriate interval, and between the reinforcing materials. Is an opening for placing concrete.

  The invention according to claim 4 is characterized in that the second receiving frame of the invention according to claim 2 is formed from one steel plate or a combination of several steel plates.

  According to the first aspect of the present invention, the concrete is not only placed between the concrete frame and the receiving frame, but is placed only between the concrete case and the receiving frame by placing the concrete through the concrete placing opening. Compared to the conventional example, the concrete can be easily filled to every corner of the receiving frame, and the weight of the receiving frame can be reduced by providing the opening.

  According to the second aspect of the invention, by placing the concrete through the opening along the reinforcing material, the same effect as the first aspect of the invention can be achieved, and the reinforcing material and the reinforcing bar can be easily welded. become.

  According to the invention which concerns on Claim 3, the receiving frame provided with the opening for concrete placement for every reinforcement can be easily obtained with a board | plate material and a reinforcement.

  According to the invention which concerns on Claim 4, the structure of a receiving frame can be simplified by forming a receiving frame from one steel plate or combining several steel plates.

Hereinafter, a groove lid mounting structure according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 6 shows that both plate members 13 and 14 of a plate member 13 having an L-shaped cross section and a plate member 14 having one side edge inclined obliquely outward are formed by a T-shaped cross-section reinforcing member 15. FIG. 7 shows a receiving frame 17 corresponding to a second receiving frame which is connected to the longitudinal direction at an appropriate interval and the reinforcing material is an opening 16 for placing concrete. FIG. 7 shows the receiving frame 17 attached to the ground B. The mounting of the receiving frame 17 to the ground B is shown in FIG. 6 in a state in which the receiving frame 17 shown in FIG. The reinforcing bar 15 and the reinforcing member 15 are further fixed by welding and the anchor 21 fixed to the inclined receiving edge 14a of the plate member 14 and the cutting bar 19 are welded and fixed. Thereafter, concrete is placed between the plate member 14 and the concrete frame 18 and from each opening 16.

  The receiving frame 24 (see FIG. 9) corresponding to the building A corresponding to the first receiving frame is connected to the building A in the same manner as the conventional receiving frame 1 shown in FIGS.

  FIG. 8 shows a state in which the groove lid 3 is erected after placing concrete on the receiving frame 24 attached to the building A side and the receiving frame 17 attached to the adjacent ground B side through the groove D. 3 is attached with a cover plate 5 that spans the ground B as in the case of the groove lid 3 shown in FIGS. In the figure, reference numeral 22 denotes a placed concrete layer.

  In addition, since the above-mentioned concrete layer 22 shrinks by drying and settles from the plate materials 13 and 14 after drying, in the receiving frame 17 shown in FIG. 7, the groove lid 3 hits the plate materials 13 and 14 while being attached to the receiving frame 17. Although it is supported by both plate materials, the concrete surface after drying is made to be flush with the plate materials 13 and 14 by raising the concrete for the shrinkage allowance in consideration of the shrinkage allowance of the concrete, and the groove lid 3 It can also be made to support with a concrete layer with the board | plate materials 13 and 14. FIG.

  According to the mounting structure of the present embodiment, when the groove width changes during an earthquake, the free end side of the groove cover 3 slides on the receiving frame 17 as in the conventional groove cover 3 shown in FIGS. When the groove width becomes narrower as shown in FIG. 3, the inclined edge 4 provided at the free end of the groove lid hits the inclined receiving edge 14a at the end of the receiving frame 17 and rides on the ground B as shown in FIG. That is, by placing concrete from the openings 16 of the receiving frame 17 and between the plate member 14 and the concrete frame 18, the concrete can be easily filled to the corners of the receiving frame 17 under the plate members 13 and 14. Since the receiving frame 17 is composed of the plate members 13 and 14 and the reinforcing material 15, the structure is simple, and the space between the reinforcing materials is an opening 16, so that the overall weight is reduced, and the reinforcing material 15. Opening 16 on both sides In order that an effect such that the welding of the reinforcing member 15 and the insert muscle 19 through the opening 16 can be easily performed.

  In the above-described embodiment, the receiving frame 17 is composed of the plate members 13 and 14 and the reinforcing member 15 that connects the two plate members 13 and 14, and the space between the reinforcing members is an opening 16 for placing concrete, but in another embodiment, The receiving frame 17 is formed from a single steel plate. In the case of forming from a single steel plate, the receiving frame 17 is formed by pressing or other machining, and in the case of pressing, the inclined receiving edge 14a is formed by bending and the opening is formed by punching. When the receiving frame 17 is formed from a single steel plate, the reinforcing member 15 may be attached or omitted. When omitted, the insertion bar 19 is directly welded and connected to the steel plate constituting the receiving frame 17.

  In yet another embodiment, the receiving frame 17 is formed from a plurality of steel plates and is assembled on the reinforcing material 15. FIG. 9 shows one of these preferred embodiments. A plate member 25 in which recesses 24 are formed on one side with the same pitch as the reinforcing member 15 and an inclined receiving edge 25a is formed on the other side, and on one side. A plate material 28 having a recess 27 formed at a location corresponding to the recess 24 is abutted so that an opening 29 is formed between the recess 24 and the recess 27 and placed on the reinforcing material, or a reinforcing material. 15 is fixed by welding.

The figure which shows the state where the groove cover was spanned between the building of the seismic isolation design and the ground Diagram showing the condition when the groove width is narrowed by an earthquake The figure which shows the state where the groove width further narrowed down due to the earthquake and the groove cover got on the ground The figure which shows the state which attached the receiving frame to the reinforcing bar on the ground side Cross-sectional view of the groove lid mounting structure with concrete The perspective view of the principal part of the receiving frame used with the attachment structure of the groove cover which concerns on this invention Sectional view of the receiving frame shown in Fig. 6 attached to the ground Sectional view of groove cover mounting structure with groove cover attached The perspective view of the principal part of another example of a receiving frame

Explanation of symbols

1, 2, 17 .. receiving frames 2 a, 14 a, 25 a .. inclined receiving edge 3 .. groove cover 4 .. inclined edge 5. 10, 15 ·· Reinforcement materials 13, 14, 25, 28 · · Plate materials 11, 22 · · Concrete layers 16, 29 · · Opening 18 · · Concrete frame 24, 27 · · Recess

Claims (4)

  An installation structure of a groove lid installed in a groove formed around a building such as a seismically isolated building to absorb the shaking of the building at the time of an earthquake, the building and the building And a first receiving frame that is fixed to one of the adjacent grounds via a groove and to which one end of the groove cover is connected, and is fixed to one of the other of the building and the ground, and the free end side of the groove cover is slid It consists of a wide second receiving frame that is movably placed, and at least the second receiving frame of the first and second receiving frames is placed with concrete between the building or the ground. In the groove cover mounting structure, one or more concrete placing openings are formed in the second receiving frame.   The second receiving frame is fixed to the building or ground by welding a reinforcing bar projecting from the building or the ground and a reinforcing material juxtaposed at an appropriate interval in the longitudinal direction of the lower surface of the receiving frame. 2. The groove lid mounting structure according to claim 1, wherein an opening for placing the concrete is formed in the receiving frame between the materials along the reinforcing material.   The second receiving frame is composed of a plate material extending in the longitudinal direction with a certain interval and a reinforcing material for fixing both plate materials at an appropriate interval, and the space between the reinforcing materials is an opening for placing concrete. The groove lid mounting structure according to claim 2.   3. The groove lid mounting structure according to claim 2, wherein the second receiving frame is formed from one steel plate or a combination of several steel plates.

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