JP4576564B2 - Protective structures and construction methods - Google Patents

Description

  The present invention relates to a protective structure for protecting a protected object such as a road or a railway track whose valley side forms an inclined surface with a roof, and a construction method thereof.

  Generally, this type of structure is configured by supporting a roof with a support, and steel, concrete made of PC, RC, and the like are known. For example, a concrete shed forms a roof by integrally bonding a plurality of concrete main girders with a PC steel material for lateral fastening in the longitudinal direction of the road or track that is the object to be protected. Alternatively, both sides in the longitudinal direction of the track are rigidly connected to columns or walls (for example, Patent Document 1 or 2). And the main girder structure is known to have a T-shaped section or an arch-shaped section, and the supporting structure of the main girder is to support both sides of the main girder with a main column and a sub-column, or Various things are known, such as a retaining wall and a main pillar, which are walls, or a supporting wall supported by a retaining wall and a retaining wall.

By the way, in the existing road where the protection structure is provided as described above, the valley side road shoulder is often structurally fragile, and when trying to extend the existing road and provide the protection structure, There is a problem in that the foundation concrete provided on the inclined surface is enlarged, and work such as refilling the space between the existing road and the foundation concrete is required, resulting in an increase in construction cost.
No. 1-4895 Japanese Patent Publication No. 1-2722

  Therefore, the present invention provides a protective structure excellent in workability of an expanded portion on the valley side and a construction method thereof in a protective structure in which an object to be protected such as an existing road is expanded and a part thereof is covered with a roof. For the purpose.

The invention of claim 1 is a protective structure in which both sides of a roof covering at least a part of an existing road along a mountain are supported by a mountain side support and a valley side support, and the foundation of the valley side support is provided. Is a plurality of foundation piles erected in the road length direction with respect to the inclined surface on the valley side, a receiving beam is provided between these foundation piles, a floor slab is provided between the receiving beam and the mountain side , An extended portion of the road is constituted by a portion where the floor slab protrudes from the existing road to the valley side .

  According to a second aspect of the present invention, the floor slab is connected to the mountain side support and the receiving beam.

Further, the invention of claim 3, the sides of the roof covering at least a portion of the existing road along the mountains, the main protective structure formed by supported by the mountain side support and valley support, the main protection structure An extension that covers at least a part of the extended portion of the road provided on the valley side of the main protection structure by providing a mountain side foundation of the extended portion of the road and a foundation of the valley side support body of the extended portion on the valley side of the object The roof of the part is supported by the valley side support body and the valley side support body of the extension part, and the foundation of the valley side support body of the extension part is erected in the road length direction with respect to the inclined surface of the valley side A plurality of foundation piles, a receiving beam is provided between the foundation piles, a floor slab is provided between the receiving beam and a mountain side foundation of the extended portion of the road, and the roof valley side of the main protection structure The end portion is connected to the mountain side end portion of the roof of the extended portion .

  According to a fourth aspect of the present invention, in the construction method for the protective structure according to the third aspect, a pile driving device is disposed on the roof of the main protective structure, and the foundation is formed by the pile driving device on the roof. This is a construction method in which a pile is erected on the inclined surface on the mountain side, and after the erection, a receiving beam form is assembled on the foundation pile, and concrete is placed on the form frame to form a receiving beam.

  According to the configuration of claim 1, the foundation pile is erected on the inclined surface on the valley side, and the floor slab is provided between the receiving beam provided on the foundation pile and the mountain side, so that the valley side of the floor slab is protected. Since the floor slab is supported by foundation piles on the valley side, it is structurally superior and there is no need to backfill the lower part of the expanded portion, resulting in excellent workability.

  Moreover, according to the structure of Claim 2, since the peak side support body and the receiving beam of the trough side supported by the foundation pile are connected by the floor slab, the stability of the whole protection structure increases.

  Moreover, according to the structure of Claim 3, since a floor slab becomes the expansion part of the to-be-protected object which protrudes to the trough side of a main protection structure, and the floor slab is supported by the foundation pile, it is structural. This eliminates the need to refill the lower part of the extended portion, and provides excellent workability in expansion work.

  Moreover, according to the structure of Claim 4, in order to drive a foundation pile from the top of a roof, it is not necessary to use the to-be-protected object of a main protection structure during the construction period of a pile. Since the work can be performed on the valley side of the main protective structure by providing a scaffolding, etc., if the protected object is a road, traffic can be secured even during the construction period.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new protection structure and its construction method different from the conventional ones, a protection structure and its construction method which are not conventional are obtained, and the protection structure and its construction method will be described.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 2 show a first embodiment of the present invention, which shows a road expansion structure using a rock shed made of concrete that is a protective structure, and an existing road 101 that is a protected object is a mountain side Y Sandwiched between the upward inclined surface 102 and the downward inclined surface 103 of the valley side T. FIG. 2 shows a state in which the construction for constructing the wall body 6 which is the mountain side support body is completed, and the lower side of the pillar 5 which is the valley side support body of the rock shed R scheduled to be constructed is the mountain side inclined surface 103. ing. The columns 5 are provided at predetermined intervals in the road longitudinal direction, and precast concrete products are used.

  The rock shed R is formed by integrally bonding a plurality of precast concrete main girders 1 with a PC steel material 2 for lateral fastening in the length direction of a road 110 or a track as a protected object, and a roof 3 along a mountain Y. The main girder 1 is provided with tension by a pre-tension method by the PC steel material 4 facing the road 110 or the track width direction, and both sides of the road 3 or the track direction of the roof 3 are supported on the valley side. Are mounted on the receiving surface 6A on the wall 5 that is the pillar 5 and the mountain-side support body, and both sides in the width direction of the roof 3 are coupled to the column 5 and the wall body 6 by the anchor 7 and the anchor 7A, respectively. A rubber plate 8 is interposed between the pillar 3 and the pillar 5 to form a hinge joint, and a rubber plate 8 is interposed between the roof 3 and the wall body 6 to form a hinge joint. A menase hinge-like contact portion 9 is formed at the lower portion of the pillar 5.

  Further, the upper surface of the roof 3 is a protective surface 3M of the rock shed R, and an enclosure block 13 is provided on the valley T side of the roof 3, and the enclosure block 13 is made of cast-in-place concrete or made of precast. The enclosure block 13 is fixed to the roof 3. A sand layer is provided as a buffer layer 14 between the enclosure block 13 and the mountain Y on the protective surface 3M. Further, a lateral mountain-side foundation 10 projecting toward the valley side is integrally provided at the lower part of the wall body 6, and the end portion of the floor slab 11 is placed on the valley-side upper part of the mountain-side foundation 10. A stepped portion 10A is formed. The floor slab 11 is made of precast concrete or steel. In this example, a precast concrete floor slab is used.

  In the construction of the rock shed R, foundation piles 21 are driven into the inclined surface 103 of the valley side T at predetermined intervals in the road length direction, and steel pipe piles, concrete piles, or the like are used as the foundation piles 21. On the foundation pile 21, a receiving beam 22 in the road length direction is provided. The receiving beam 22 is continuous in the length direction of the road 110, and is formed of a cast-in-place concrete or precast concrete product, and has a square cross section. An engaging step portion 22A on which the end portion of the floor slab 11 is placed is formed on the mountain side upper portion of the receiving beam 22 having a flat upper surface. A floor slab 11 is laid on the mountain side foundation 10 and the receiving beam 22, and the floor slab 11 is juxtaposed in the length direction of the road 110. The lower part of the column 5 is fixed to the upper surface of the receiving beam 22.

  In this example, the mountain side foundation 10 and the receiving beam 22 are connected by the floor slab 11. As shown in FIG. 1, both end sides of a floor slab 11 are placed on the engaging step portions 10A and 22A and connected by a connecting member 12 such as an anchor. The floor slab 11 constitutes the road surface or roadbed of the road 110. That is, the road surface may be constituted by the upper surface of the floor slab 11, or the upper surface of the floor slab 11 may be paved and used as the road bed.

  In the rock shed R as described above, the portion where the floor slab 11 protrudes from the existing road 101 to the valley side becomes an extended portion 110K of the road 110, and the valley side of the floor slab 11 is formed by the foundation pile 21 and the receiving beam 22 Since it supports, it is not necessary to provide a large retaining wall that is continuous in the longitudinal direction of the road on the inclined surface 103, and it is not necessary to fill soil between the retaining wall and the inclined surface 103. There is no need to refill the lower part of the extended portion 110K of the floor slab 11, and even when the road shoulder of the existing road 101 is soft and needs to be improved, this is not necessary and the workability is excellent.

As described above, in this embodiment, corresponding to claim 1, both sides of the roof 3 covering at least a part of the existing road 110 that is a protected object along the mountain Y are provided on the wall 6 and the valley side as the mountain side support. In the rock shed R which is a protective structure supported by the pillar 5 as the support body, the foundation of the pillar 5 is a plurality of foundation piles 21 erected in the road length direction with respect to the inclined surface 103 on the valley side. , A receiving beam 22 is provided between these foundation piles 21, a floor slab 11 is provided between the receiving beam 22 and the mountain side foundation 10 which is the mountain side, and the floor slab 11 protrudes from the existing road 101 to the valley side. Since the extended portion 101K of the road 101 is configured , the valley side of the floor slab 11 becomes the extended portion 110K of the road 110, and the floor slab 11 is supported by the foundation pile 21 on the valley side. There is no need to refill the lower part of 110K, and the workability is excellent.

  In this way, in this embodiment, corresponding to claim 2, the floor slab 11 is connected to the wall body 6 which is the mountain side support body and the receiving beam 22, so that the wall body 6 and the foundation pile 21 The supported trough-side receiving beam 22 is connected by the floor slab 11, and the stability of the entire protective structure can be improved.

  3 to 9 show a second embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. The structure which expands the valley side of the existing lock shed R is shown, and the lock shed R as the protective structure is similar to the first embodiment, and the plurality of main girders 1 are connected to the road 110 or the track which is the protected object. The roof 3 along the mountain Y is formed by tightly fastening the PC steel 2 for lateral fastening in the length direction, and the main girder 1 is tensioned in a pre-tension manner by the PC steel 4 facing the road 110 or the track width direction. Force is applied, and both the road 110 or both sides of the track direction of the roof 3 are placed on the receiving surface 6A on the pillar 5 which is a valley side support body and the wall body 6 which is a mountain side support body, and the roof 3 on both sides in the width direction are connected to the column 5 and the wall body 6 by the anchor 7 and the anchor 7A, By interposing a rubber plate 8 between the root 3 and the bar 5 and hinged connection, between the roof 3 and the wall 6 has a hinged portion by interposing a rubber plate 8. A menase hinge-like contact portion 9 is formed at the lower portion of the pillar 5.

  Further, the upper surface 3M of the roof 3 is a protective surface of the rock shed R, and a sand layer can be provided as a buffer layer 14 on the protective surface 3M. In addition, a lateral footing portion 31 projecting from both the mountain side and the valley side is integrally provided at the lower portion of the wall body 6. In addition, a valley-side foundation 32 is provided at the lower part of the pillar 5, and this valley-side foundation 32 is formed of a cast-in-place concrete or a precast concrete product, and continuously in the length direction on the valley-side shoulder side of the road 110. A footing portion 32A is formed which has a flat upper surface and is buried in the lower portion. The lower part of the pillar 5 is connected and fixed to the valley side foundation 32.

  As shown in FIG. 4, the valley side of the existing lock shed R which is the main protective structure as described above is an inclined surface 103. Next, the construction method of the protection structure which expands such a road 101 is demonstrated. As shown in FIG. 5, the pile driving device 51 is placed on the roof 3 of the lock shed R, and on the inclined surface 103 on the valley side of the lock shed R, a predetermined interval is provided in the road length direction on the mountain side and the valley side, respectively. The foundation piles 41 and 21 are driven in each time. As these foundation piles 41 and 21, steel pipe piles, concrete piles, or the like are used. When the foundation piles 41 and 42 are finished, the pile driving device 51 is removed from the roof 3. The pile driving device 51 is a self-propelled device.

  After hitting the foundation piles 41 and 21, as shown in FIG. 6, a concrete foundation 42 as a mountain side foundation is provided on the mountain side foundation pile 41. A beam 22 is provided, and the concrete foundation 42 and the receiving beam 22 are continuous in the length direction of the road 110. Although the concrete foundation 42 and the receiving beam 22 can be constructed using precast concrete products, an example of construction using cast-in-place concrete will be described below.

  In the construction of the concrete foundation 42 on the mountain side, a formwork (not shown) is assembled on the upper part of the foundation pile 41 using the inclined surface 103, concrete is placed, and the engaging step 22A is formed on the upper part of the valley side. Forming a concrete foundation 42 having In this case, the upper portion of the foundation pile 41 can be buried in the foundation 42 and fixed. In addition, if the predetermined support force exists in the location of the inclined surface 103 in which the concrete foundation 42 is provided, it is not necessary to provide the foundation pile 41.

  On the other hand, in order to construct the receiving beam 22 on the foundation pile 21 on the valley side, as shown in FIG. 6 and FIG. 7, the foundation piles 21 and 21 adjacent to each other in the longitudinal direction of the road are made of a concrete plate or an iron plate. A flat plate 23 is installed, and a scaffold is assembled between the flat plate 23 supported by the foundation pile 21 and continuing in the longitudinal direction of the road, and the foundation pile 41 and the foundation pile 21 before the concrete foundation 42 is provided. Preferably, as shown in FIG. 6, a scaffold 52 is provided between the flat plate member 23 that also serves as a formwork and the concrete foundation 42, and then the scaffold 52 is used from the road 110 side. Then, the mold materials 25 and 25A are carried onto the flat plate material 23, and the mold is assembled on the receiving beam 22 as shown in FIG. This mold is provided with the flat plate member 23 that forms the lower surface of the receiving beam 22 and side surface mold members 25 and 25A that form the side surfaces of the receiving beam 22. The portion 22A is formed, and concrete is placed inside the formwork, and the receiving beam 22 having the engaging step portion 22A at the upper part of the valley side is constructed. In this case, the side surface mold members 25 and 25A are removed, but the flat plate member 23 is integrated with the concrete receiving beam 22. Further, the receiving beam 22 and the foundation pile 21 are connected by a connecting means (not shown).

  When laying the flat plate 23 between the foundation piles 21 and 21, first, a scaffold 52 is assembled between the foundation 42 or the foundation pile 41 and the foundation pile 21, and the scaffolds 52 adjacent to each other in the longitudinal direction of the road. The flat plate 23 may be transported from the road 101 side using 52 and installed between the foundation piles 21 and 21.

  When the receiving beam 22 is continuously formed in the longitudinal direction of the road in this way, as shown in FIG. 9, both end sides of the floor slab 11 are engaged and placed on the engaging step portions 42A and 22A, and anchors or the like The connection is made by the connecting member 12, and the concrete foundation 42 that is the mountain side foundation and the receiving beam 22 are thus connected by the floor slab 11. A portion on the valley side from the pillar 5 is an extended portion 110K of the road 110.

  Further, the extended portion 110K is covered with a new roof 63 of a protective structure, and the roof 63 includes a plurality of precast concrete main girders 61 in the length direction of the extended portion 110K of the road 110 which is a protected object. Is formed by tightly fastening by a PC steel material 62 for lateral fastening toward the side, and is formed so as to be continuous with the existing roof 3. The valley side end portion 3 T of the existing roof 3 and the mountain side end portion of the new roof 63 are formed. It is connected to 63T by connecting means (not shown), whereby the mountain side of the newly installed roof 63 is supported by the pillar 5 and the valley side foundation 32 which are mountain side supports of the roof 63. That is, the roof 63 side is an additional part of the main protective structure. Further, the main girder 61 is provided with tension by a pretension method by the PC steel material 64 extending in the width direction of the extended portion 110K, and the trough side of the roof 63 is placed on the column 65. The roof 63 is connected with an anchor 67, and the lower portion of the column 65 is connected to the upper surface of the receiving beam 22. The pillars 65 are provided at predetermined intervals in the road longitudinal direction. In FIG. 3, a pavement layer 111 is provided on the floor slab 11.

Further, in the present embodiment in this manner, corresponding to claim 3, on both sides of the roof 3 covering a part even without least the existing road 101 along the mountain Y, mountain side support serving wall 6 and valley In the main protection structure R supported by the pillar 5 as the support body, on the valley side of the main protection structure R , the concrete foundation 42 which is the mountain side foundation of the extension portion 101K of the road 101 and the valley side support body of the extension portion 101K. The roof 63 of the extended portion 101K that covers at least a part of the extended portion 101K of the road 101 provided on the valley side of the main protection structure R is provided with the foundation of the column 65 and the column 5 as the valley side support and the extended portion 101K. The foundation of the pillar 65 which is supported by the pillar 65 which is the valley side support body and which is the valley side support body of the extended part 101K is a plurality of foundation piles which are erected in the road length direction with respect to the inclined surface 103 on the valley side. the receiving beam 22 provided between these foundation pile 21 is a mountain side foundation dilation 101K of the receiving beam 22 and the road 101 Conch The deck 11 is provided between the over preparative basis 42, because the concatenation of the main protective structure valley end 3T of the roof 3 of R and the mountain side end portion 63T of the expanded portion 101K of the roof 63, floor slab 11 It becomes the extended part 110K of the road 110 projecting to the valley side of the rock shed R, and the floor slab 11 is supported by the foundation pile 21 on the valley side, so it is structurally excellent and the lower part of the extended part 110K is refilled. There is no need, and the construction work is excellent in expansion work.

  Thus, in this embodiment, corresponding to claim 4, in the construction method of the protective structure according to claim 3, the pile driving device 51 is placed on the roof 3 of the lock shed R which is the main protective structure. The foundation pile 21 is erected on the inclined surface 103 on the mountain side by the pile driving device 51 on the roof 3, and after the erection, the formwork for the receiving beam 22 is assembled on the foundation pile 21, and the formwork Since the concrete beam is cast on the bridge 3 to form the receiving beam 22, it is not necessary to use the Rock Shed R road 110 during the construction of the pile. Since it is possible to work on the valley side of the existing rock shed R by providing a scaffolding on the foundation pile 21, traffic can be secured even during the construction period.

  Further, as an effect on the embodiment, since the scaffolding 52 is provided between the flat plate member 23 and the concrete foundation 42, on the inclined surface 103 where the heavy machinery and the like are poor and the scaffolding is difficult to use, on the upper part of the foundation piles 21 and 21 The construction of the receiving beam 22 can be easily performed, and the construction cost can be reduced as a whole.

  FIG. 10 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and detailed description thereof will be omitted. The connecting structure of the beams 22 is different from that of the second embodiment, and as shown in the figure, a thicker portion 11N thicker than the other portions is formed at the valley side end of the floor slab 11, and this is the end. The thick portion 11N is connected and fixed to the receiving beam 22 in a state of being placed on the receiving beam 22, and the lower portion of the column 65 is connected and fixed to the thick portion 11N.

  Thus, also in the present embodiment, the same operation and effect are exhibited in correspondence with the above claims.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, various methods can be used for the connection structure of the protection structure and each member of the foundation.

It is sectional drawing of the protection structure which shows Example 1 of this invention. It is sectional drawing of the state which constructed the mountain side support body on the existing road same as the above. It is whole sectional drawing after expanding the to-be-protected object (road) which shows Example 2 of this invention. It is sectional drawing of a main protection structure same as the above. It is sectional drawing which shows the state which mounted the pile driving device on the roof of the main protection structure same as the above. It is sectional drawing of the state which built the scaffold using the foundation pile etc. same as the above. It is a side view which shows the state which laid the flat material on the foundation pile same as the above. It is sectional drawing which shows the state which assembled the formwork on the foundation pile same as the above. It is sectional drawing which shows the state which provided the floor slab between the receiving beam and the mountain side foundation same as the above. It is whole sectional drawing after expanding the to-be-protected object (road) which shows Example 3 of this invention.

Explanation of symbols

R lock shed (protection structure / main protection structure)
3 Roof
3T valley side edge 5 pillar (valley side support)
6 Wall (mountain side support)
10 Mountain side foundation
11 Floor slab
21 Foundation pile
22 Receiving beam
23 Flat plate
32 Valley side foundation
41 Foundation pile
42 Concrete foundation (mountain foundation)
51 Pile driver
52 Scaffold
63 Roof
63T mountain side edge
65 Pillar (mountain side support)
101 Existing road
102 Inclined surface (mountain)
103 Inclined surface (valley)
110 road
110K extension

Claims (4)

In a protective structure formed by supporting both sides of a roof covering at least a part of an existing road along a mountain with a mountain side support and a valley side support, the foundation of the valley side support is inclined on the valley side. A plurality of foundation piles erected in the road length direction with respect to the surface, a receiving beam is provided between the foundation piles, a floor slab is provided between the receiving beam and the mountain side, and the floor is removed from the existing road. A protective structure characterized in that the expansion part of the road is constituted by the part of the plate protruding to the valley side . The protective structure according to claim 1, wherein the floor slab is connected to the mountain-side support body and the receiving beam. Both sides of the roof covering at least a portion of the existing road along the mountains, the main protective structure formed by supported by the mountain side support and valley support, the valley side of the main protection structure, of the road An extension portion roof and an extension portion valley side support base are provided, and the extension portion roof covering at least a part of the extension portion of the road provided on the valley side of the main protective structure is the valley side support. And the foundation of the valley side support of the extension part is a plurality of foundation piles erected in the road length direction with respect to the inclined surface of the valley side, these A receiving beam is provided between the foundation piles, a floor slab is provided between the receiving beam and the mountain side foundation of the extended portion of the road, and the trough side end of the roof of the main protection structure and the roof of the extended portion are provided. A protective structure characterized by connecting the mountain side ends . 4. The construction method for a protective structure according to claim 3, wherein a pile driving device is disposed on the roof of the main protective structure, and the foundation pile is set up on the slope on the mountain side by the pile driving device on the roof. A method for constructing a protective structure comprising: installing and standing up, forming a receiving beam form on the foundation pile, and placing concrete on the form to form a receiving beam.

Images