JP4479005B2 - Road expansion structure and road expansion method - Google Patents

Description

  The present invention relates to a road expansion structure and a road expansion method for expanding a road whose valley side forms an inclined surface to the valley side.

  Conventionally, as a road expansion structure, the foundation formed by placing foundation concrete and the upper surface of the joint concrete that is piled and fixed to the head are formed horizontally, and the frame material and floor slab are laid on this There is an assembly sidewalk (for example, Patent Document 1) in which a sidewalk is constructed.

  In this assembly sidewalk, piles are driven into the slopes of the cliffs, and the joint part concrete is fixed to the heads of the piles, and the other end of the frame member is placed on and supported by the joint part concrete. The side edge is fixed to the foundation concrete on the roadway side.

Moreover, as an artificial ground for roads using steel materials, a steel pipe pile placed on the ground and a plate having an outer diameter substantially the same as that of the steel pipe pile are integrally coupled to the upper part of the steel pipe pile. A pile head block and a plurality of steel pipes connected by a connecting member, and a grading girder whose legs are placed and coupled on the pile head block, and the grading girder are mutually connected. There exists a thing (for example, patent document 2) which has a connection girder to perform.
Japanese Utility Model Publication No.57-128603 JP 2000-282403 A

  In the road expansion structure as described in Patent Document 1, since the foundation concrete is provided near the valley shoulder of the weak current road (roadway), the foundation concrete tends to be structurally unstable and a stable foundation. If the size is increased or piles are used to construct the construction, the construction cost will increase. In addition, it is a structure in which a frame material is placed and supported on a foundation pile (pile) provided on the slope, and thus the foundation pile can obtain a high support force for vertical load, but the upper end of the foundation pile Since it is a free end, it is weak against horizontal forces such as earthquakes. In particular, if the dimension protruding from the slope is large, sufficient seismic performance cannot be obtained unless the foundation pile is enlarged.

  By the way, in the structure where the road along the mountain is extended to the valley side, the longitudinal and crossing of the receiving beam is performed according to the longitudinal gradient (gradient in the road length direction) and the transverse gradient (curvature in the road width direction) of the existing road. It is necessary to provide a gradient, and it is necessary to set different longitudinal and transverse gradients for adjacent receiving beams on the foundation pile, and to join the ends of the receiving beams to the foundation pile.

  If the pile and the connecting girder are made of steel as in Patent Document 2, the connecting girder can be attached to the pile head in accordance with the gradient using welding, bolts and nuts, etc. When precast concrete products are used, the work of joining the receiving beam to the pile becomes complicated in order to cope with construction errors and longitudinal gradients associated with the construction of the pile. A joint structure that reliably prevents the beam from falling is required.

  Then, this invention aims at providing the road expansion structure which can join a receiving beam on a foundation pile reliably, and can also perform the operation | work which joins a receiving beam on a foundation pile according to the gradient of a road easily. And

The invention according to claim 1 is a road expansion structure that expands a road whose valley side forms an inclined surface, wherein a plurality of foundation piles are erected in the road length direction with respect to the inclined surface, and precast concrete made between the foundation piles. A receiving plate, a floor slab is provided on the receiving beam, the receiving beam is rigidly connected to the foundation pile by a rigid structure, and the rigid structure is a pile-side connecting member protruding from the basic pile. And a receiving beam side connecting member projecting on the outer surface of the receiving beam, and a cast-in-place concrete part in which the pile side and the receiving beam side connecting member are embedded , forming a recess on a side surface of the receiving beam, The receiving beam side connecting member protrudes from a concave portion formed on a side surface, and the spot cast concrete portion is embedded in the concave portion .

In the invention of claim 2, the foundation pile is erected on the inclined surface on the valley side of the road, a concrete foundation is provided on the valley side of the road, and a floor slab is placed on the concrete foundation and the receiving beam. It is arranged in parallel in the length direction and connects the receiving beam and the concrete foundation.

In the invention of claim 3 , the foundation piles are erected side by side in the road crossing direction.

According to a fourth aspect of the present invention, in the road expansion method for expanding a road whose valley side forms an inclined surface, a plurality of foundation piles are erected in the road length direction with respect to the inclined surface, and precast between the foundation piles. A concrete receiving beam is provided, a floor slab is provided on the receiving beam, a pile side connecting member is protruded from the foundation pile, the receiving beam has a recess on a side surface, and the side surface of the receiving beam is projecting the receiving beam-side coupling member in the recess, the recess and its those pile side and receiving beam-side coupling member is embedded by concrete cast-in-place is a construction method of rigidly connected to the receiving beam to the foundation pile .

  According to the configuration of claim 1, the receiving beam is arranged on the foundation pile, the mold side is provided on the foundation pile so as to surround the pile side and the receiving beam side connecting member, and concrete is placed in the mold frame, By the cast-in-place concrete part where the concrete is hardened, the receiving beam is rigidly connected to the foundation pile, and the rigid connection work can be easily performed. Since the cast-in-place concrete is used in this way, even if there is a construction error in the position of the foundation pile, it can be easily absorbed, and even if the height of the foundation pile is different due to the longitudinal gradient, etc. It is possible to join a receiving beam between the upper surfaces of various foundation piles.

Moreover, according to the structure of Claim 1 , the movement of a receiving beam to the width direction of a recessed part can be prevented effectively according to the structure where a cast-in-place concrete part bites into a recessed part.

Moreover, according to the structure of Claim 1 , the recessed part of the side surface and the receiving beam side connection member are joined to a foundation pile by the cast-in-place concrete part in the receiving beam of a substantially square cross section, and the stable joint strength is obtained.

Further, according to the configuration of claim 2 , by connecting the receiving beam and the concrete foundation, the concrete foundation on the road valley side is stabilized by the foundation pile, and when a horizontal force is applied to the foundation pile due to an earthquake or the like, In contrast, the seismic performance of the foundation pile is improved by the concrete foundation of the road.

Moreover, according to the structure of Claim 3 , the road expansion structure which supported the road crossing direction both sides with the foundation pile is obtained.

According to the structure of Claim 4 , since a rigid connection operation | work with a foundation pile and a receiving beam can be performed easily, even if there exists a construction error in the position of a foundation pile, this is easy. In addition, even when the height of the foundation pile is different due to the longitudinal gradient, the receiving beam can be joined between the horizontal upper surfaces of the foundation pile.

  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 road expansion structure and a road expansion method different from the conventional ones, an unprecedented road expansion structure and a road expansion method can be obtained, and the road expansion structure and the road expansion method will be described.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show a first embodiment of the present invention. As shown in the drawing, in the road expansion structure, an existing road 1 includes an upward slope 2 on a mountain side Y and an downward slope on a valley side T. 3 and the upward inclined surface 3 on the mountain side Y. 11 is a floor slab, 12 is a concrete foundation, 13 is a receiving beam, and 14 is a foundation pile.

  In the expansion work, a concrete foundation 12 is formed on the road 1 on the inclined surface 3 side of the valley side T. The concrete foundation 12 is formed of cast-in-place concrete or precast concrete product, and the length direction on the shoulder side of the road 1 And has a flat upper surface. On the inclined surface 3 of the valley side T, foundation piles 14 are driven in at predetermined intervals in the road length direction. As the foundation piles 14, steel pipe piles, concrete piles, or the like are used. On the foundation pile 14, a receiving beam 13 in the length direction of the road is provided. The receiving beam 13 is continuous from the length direction of the road 1 and is formed of a precast concrete product, and has a rectangular cross section and a flat upper surface. Have A floor slab 11 is laid on the concrete foundation 12 and the receiving beam 13, and the floor slab 11 is juxtaposed in the length direction of the road 1 as shown in FIG. 3. The floor slab 11 is made of precast concrete or steel.

  In this example, the concrete foundation 12 and the receiving beam 13 are connected by the floor slab 11. As shown in FIG. 2, the concrete foundation 12 and the peak side of the floor slab 11 are hinged, and a plate-like elastic body 15 such as a rubber plate is disposed between the concrete foundation 12 and the floor slab 11. The hinge joint H1 is formed by inserting an anchor 19 such as a reinforcing bar into the hole 16 of the concrete foundation 12, the through hole 17 of the elastic body, and the through hole 18 of the floor slab 11. Further, the receiving beam 13 and the center of the valley side of the floor slab 11 are hinge-coupled, and a plate-like elastic body 15A such as a rubber plate is disposed between the receiving beam 13 and the floor slab 11, and the receiving beam 13 The hinge coupling portion H2 is formed by inserting an anchor 19A such as a reinforcing bar into the through hole 16A, the elastic through hole 17A, and the through hole 18A of the floor slab 11.

  Further, the foundation pile 14 and the receiving beam 13 are rigidly connected by a rigid connection structure 21, and the configuration of the rigid connection structure 21 will be described. As shown in FIGS. 2 to 4 and the like, a substantially horizontal mounting plate 14A is provided on the upper portion of the foundation pile 14 made of a steel pipe pile, and a pile such as a gibber or a reinforcing bar is provided on the mounting plate 14A. A side connecting member 22 is provided in a protruding manner, and in FIG. 2, a gibber having an enlarged head is shown, and is fixed to the mounting plate 14A by welding. The receiving beam 13 is formed with a lower recess 23 and left and right recesses 24, 24 on its lower surface and left and right side surfaces, and the lower recess 23 is spaced from the upper surface portion 23A toward the outside from both sides of the upper surface portion 23A. The left and right recesses 24 include a bottom surface portion 24A and both side step surfaces 24B and 24B whose distances increase outward from both sides of the bottom surface portion 24A. In the left and right recesses 24, 24, receiving beam side connecting members 25 such as reinforcing bars are projected from the bottom surface portions 24A, 24A. Loop members are used for the receiving beam side connecting members 25, and vertical lines on both sides are provided. The portions 25A protrude into the recesses 24 and 24, respectively. Then, concrete is cast so as to bury the protruding portions of the pile side connecting member 22, the recesses 23, 24, 24 and the receiving beam side connecting member 25, and the in-situ cast concrete part 26 is formed, and these connecting members 22, 25 and the cast-in-place concrete part 26 constitute the rigid structure 21. As shown in FIGS. 4 and 5, a plurality of recesses 23, 24, 24 can be provided in the length direction of one receiving beam 13.

  Next, a construction method for the road expansion structure will be described. On the inclined surface 3 on the valley side T, foundation piles 14 are provided by being driven at predetermined intervals in the road length direction. On the mounting plate 14A of the foundation pile 14, the recesses 23, 24, 24 of the receiving beam 13 are positioned, and a spacer (not shown) is arranged between the mounting plate 14A and the receiving beam 13 to keep a gap. The receiving beam 13 is directly placed on the placing plate 14A. Then, a mold (not shown) is assembled on the mounting plate 14A so as to surround the recesses 23, 24, 24 and the pile-side connecting member 22, and concrete is placed inside the mold, and the concrete is solidified. Thus, a cast-in-place concrete portion 26 is formed. In the cast-in-place concrete portion 26, pile-side and receiving-beam side connecting members 22, 25 are embedded, and the receiving beam 13 is rigidly connected to the foundation pile 14. In this case, since the foundation pile 14 and the receiving beam 13 are rigidly connected by the cast-in-place concrete part 26, as shown in FIG. 7, even when there is a height difference between the adjacent foundation piles 14 and 14 due to the longitudinal gradient, By assembling a mold so as to surround the recesses 23, 24, 24, and filling the mold with concrete, both can be rigidly connected without processing the mounting plate 14A of the foundation pile 14, etc. Or, even if the center of the foundation pile 14 and the width center of the receiving beam 13 are displaced due to construction errors, the error can be absorbed by the cast-in-place concrete part 26, and the rigid connection can be reliably and easily performed. . In the rigid connection structure 21 formed in this way, the pile pile and the receiving beam 13 are integrated by the pile side and receiving beam side connecting members 22 and 25 and the in-situ concrete part 26, and the in-site The concrete portion 26 is rigidly connected to the foundation pile 14 in a state where the movement of the receiving beam 13 in the length direction is restricted by the structure in which the concave portions 23 and 24 are bitten.

Thus, in this embodiment, corresponding to claim 1, in the road expansion structure in which the valley side T extends the road 1 forming the inclined surface 3, a plurality of foundation piles in the road length direction with respect to the inclined surface 3. 14 and 14 are erected, and a precast concrete receiving beam 13 is provided between the foundation piles 14 and 14. A floor slab 11 is provided on the receiving beam 13, and the receiving beam 13 is rigidly connected to the foundation pile 14. The rigid structure 21 includes a pile-side connecting member 22 protruding from the foundation pile 14, a receiving-beam connecting member 25 protruding from the outer surface of the receiving beam 13, and the pile-side and receiving members. A cast-in-place concrete part 26 in which the beam-side connecting members 22 and 25 are embedded, a recess 24 is formed on the side surface of the receiving beam 13, and the beam-side connecting member 25 is protruded from the recess 24 formed on the side surface. 24 is buried in the cast-in-place concrete part 26, so that the receiving beam 13 is arranged on the foundation pile 14, and a form is provided on the foundation pile 14 so as to surround the pile side and the receiving beam side connecting members 22, 25, The concrete is placed in the formwork, and the receiving beam 13 is rigidly connected to the foundation pile 14 by the cast-in-place concrete portion 26 where the concrete is hardened, so that the rigid connection work can be easily performed. Since the cast-in-place concrete is used in this way, even if there is a construction error in the position of the foundation pile 14, this can be easily absorbed, and the height of the adjacent foundation piles 14, 14 due to the longitudinal gradient etc. Even if they are different, it is possible to join the receiving beam between the upper surfaces of the horizontal foundation piles 14 and 14.

In this way, the precast foundation pile 14 and the precast receiving beam 13 can be simply rigidly connected on site, and by adopting the rigid connection structure 21, the receiving beam 13 from the foundation pile 14 can be A structure for preventing the fall and a structure for limiting the displacement of the receiving beam 13 with respect to the foundation pile 14 become unnecessary.
In this way, in this embodiment, corresponding to claim 1 , the recess 24 is formed on the outer surface of the receiving beam 13, and the recess 24 is embedded in the in-situ concrete part 26. With the structure of biting into the recesses 23 and 24, the movement of the receiving beam 13 in the width direction of the recesses 23 and 24 can be effectively prevented.

Further, in the present embodiment in this manner, corresponding to claim 1, since the receiving beam-side coupling member 25 in a recess 24 formed in front SL side projecting from, the receiving beam 13 of a substantially rectangular, the sides The recessed portion 24 and the receiving beam side connecting member 25 are joined to the foundation pile 14 by the cast-in-place concrete portion 26, and a stable joining strength is obtained.

In this way, in this embodiment, corresponding to claim 2 , the foundation pile 14 is erected on the inclined surface 3 on the valley side T of the road 1, and the concrete foundation 12 is provided on the valley side T of the road 1, Since the floor slab 11 is juxtaposed in the road length direction on the concrete foundation 12 and the receiving beam 13 and the receiving beam 13 and the concrete foundation 12 are connected, the concrete foundation 12 on the valley side T of the road 1 is In addition to being stabilized, when a horizontal force is applied to the foundation pile 14 due to an earthquake or the like, the concrete foundation 12 of the road 1 opposes this, thereby improving the earthquake resistance performance of the foundation pile 14.

Thus, in the present embodiment, corresponding to claim 4 , in the road expansion method for expanding the road 1 where the valley side T forms the inclined surface 3, a plurality of foundation piles in the road length direction with respect to the inclined surface 3 14, 14 ... are erected, a precast concrete receiving beam 13 is provided between the foundation piles 14, 14. The floor slab 11 is provided on the receiving beam 13, and the pile-side connecting member 22 is projected to the foundation pile 14. The receiving beam side connecting member 25 protrudes from the outer surface of the receiving beam 13 , the receiving beam 13 has a recess 24 on the side surface, and the receiving beam side connecting member 25 protrudes from the recess 24 on the side surface of the receiving beam 13. and, its because the these pile side and receiving beam-side coupling member 22, 25 and the recess 24 is embedded by concrete cast-in-place to rigidly the receiving beam 13 to foundation pile 14, the foundation pile 14 and the receiving beam 13 Because it is possible to perform the bundling work easily and use cast-in-place concrete, even if there is a construction error in the position of the foundation pile 14, this can be easily absorbed. Even if the height of the foundation pile 14 and 14 adjacent the distribution like are different, can be bonded to receiving beam between the upper surface of the horizontal foundation piles 14, 14.

  In addition, as an effect on the embodiment, the connecting portion of the foundation pile 14 and the receiving beam 13 is rigidly connected, and the connecting portion of the receiving beam 13 and the floor slab 11 is hinged, and the receiving beam 13 and the concrete foundation 12 are connected. Connected by floor slab 11, hinged connection between floor slab 11 and concrete foundation 12 and hinged connection between foundation pile 14 and receiving beam 13 connecting part and receiving beam 13 and floor slab 11 connecting part In addition, since the other is rigidly connected, the concrete foundation 12 and the floor slab 11 are hinged to provide excellent workability on site, and the foundation pile 14, the receiving beam 13 and the floor slab 11 Since the concrete foundation 12 has a primary statically indeterminate structure, local stress concentration is unlikely to occur when horizontal and vertical loads are applied, and the foundation pile 14 and the concrete foundation 12 support each other via the floor slab 11. It becomes a structure and a stable structure is obtained. In addition, the floor slab 11 is made of precast concrete, and compared with the case where the precast concrete floor slab 11 is rigidly connected to the concrete foundation 12 and the receiving beam 13 on site, the connection is only hinged, so the workability is excellent. It will be a thing. In this case, when the foundation 12 and the receiving beam 13 are made of precast concrete, the construction related to the coupling is further facilitated. Further, the receiving beam side connecting member 25 is a loop line embedded in the receiving beam 13, and the vertical line portion 25 </ b> A protrudes into the recessed portion 24, so that the cast-in-place concrete portion 26 and the receiving beam 13 are effectively integrated. be able to.

  FIG. 8 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and detailed description thereof will be omitted. For example, a hole 27 is formed in the mounting plate 14A of the foundation pile 14, a bar 28 such as a deformed reinforcing bar is inserted into the hole 27, and nuts 29, 29 are inserted into the screw portion 28A below the bar 28. Are screwed together and the mounting plate 14A is clamped by these nuts 29, 29 to fix the bar 28, and the bar 28 constitutes a pile side connecting member 22A. In this case, the bar 28 may be welded to the mounting plate 14A.

  As described above, as the pile-side connecting members 22 and 22A, various members can be used as long as they are embedded in the in-situ concrete part 26 and integrate the foundation pile 14 and the in-situ concrete part 26.

  FIG. 9 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. A plate-shaped buried mold 31 such as a rubber plate is disposed between the receiving beam 13 and the floor slab 11, and a hole 16A of the receiving beam 13, an elastic through-hole 17A, and a floor slab An anchor 19A such as a rebar having a smaller diameter is inserted into the 11 through hole 18A, and a filling material 32 such as mortar or grout is filled in the filling mold 31 and the through hole 18A to connect the hinge. H2 is formed.

  FIGS. 10-11 shows Example 4 of this invention, attaches | subjects the same code | symbol to the same part as each said Example, and abbreviate | omits the detailed description. The foundation piles 14 and 14 are driven into the inclined surface 3 of the valley side T at predetermined intervals along the road length direction and in the transverse direction (width direction) of the road 1. Steel pipe piles, concrete piles, and the like are used, and at least the mounting plate 14A in front of the head is constituted by a steel plate or the like.

A precast concrete receiving beam 13 is provided between the foundation piles 14, 14 arranged in the length direction of the road 1, and the receiving beam 13 is rigidly connected to the foundation pile 14 by the rigid connection structure 21. Further, a floor slab 11 is laid on the receiving beams 13 and 13 arranged in the road width direction . Wherein both sides of this deck 11 hinged connection H2, it is hinged to the receiving beam 13 by H2. The floor slab 11 is juxtaposed in the length direction of the road 1 and is made of precast concrete or steel.

  And after installing the floor slab 11, as shown in FIG. 11, the continuous part 35 which continues between the road 1 and the floor slab 11 is formed, and the trough side T of the road 1 is widened by the floor slab 11.

  As described above, in this embodiment, in the road expansion structure in which the valley side T extends the road 1 forming the inclined surface 3, a plurality of foundation piles 14, 14. , A precast concrete receiving beam 13 is provided between the foundation piles 14, 14, a floor slab 11 is provided on the receiving beam 13, and the receiving beam 13 is rigidly connected to the foundation pile 14 by a rigid connection structure 21. The linking structure 21 includes a pile side connecting member 22 protruding from the foundation pile 14, a receiving beam side connecting member 25 protruding from the outer surface of the receiving beam 13, and the pile side and receiving beam side connecting members 22, 25. And a recessed portion 24 is formed on the outer surface of the receiving beam 13, the recessed portion 24 is embedded in the in-situ concrete portion 26, and further, recessed portions 23 are formed on the side surface and the lower surface of the receiving beam 13. 24, and the receiving-beam-side connecting member 25 protrudes from the recess 24 formed on the side surface. - an effect.

Further, in the present embodiment in this manner, the support corresponding to claim 3, since standing alongside the foundation pile 14 and 14 in the transverse Direction, the transverse direction (width direction) on both sides by the foundation pile 14 and 14 A road expansion structure is obtained.

  FIG. 12 shows a fifth embodiment of the present invention. The same reference numerals are given to the same parts as those in the first embodiment, and the detailed description thereof is omitted. A pressure-sensitive cured rubber 37 is disposed between the lower surface of 13. This pressure-sensitive cured rubber 37 is a material having two extremely convenient properties, “plasticity before curing” and “elasticity after curing”. The structure is obtained by laminating several layers of two types of unvulcanized rubber, and the amount of plastic deformation before curing is 80% of the thickness. It is a rubber material that exhibits the function of equalizing uneven support reaction force in each foundation pile 14 by utilizing the characteristic of plastic deformation before curing. Further, the amount of plastic deformation of the pressure-sensitive cured rubber 37 varies depending on the applied load per surface area (surface pressure), and the amount of deformation increases as the surface pressure increases. The pressure-sensitive cured rubber 37 is cured while maintaining the amount of deformation after being left for about one week in a state where plastic deformation has occurred.

  Next, a method for constructing the receiving beam 13 will be described. The pressure-sensitive curing rubbers 37 and 37 are arranged on the mounting surface 14A, and the receiving beam 13 is lowered from above onto the pressure-sensitive curing rubbers 37 and 37 on the mounting surface 14A, and the position and height of the receiving beam 13 are lowered. The height of the end portion 13T is set with a jack or a spacer until the pressure-sensitive cured rubber 37 is cured as necessary. After that, a formwork (not shown) is assembled, and the formwork is filled with concrete to form the cast-in-place concrete part 26, and the receiving beam 13 is rigidly connected to the foundation pile 14.

  As described above, in this embodiment, by using the pressure-sensitive curing rubber 37 to support the receiving beam 13 on the foundation pile 14, the height adjustment work of the receiving beam 13 to the foundation pile 14 is facilitated, and the rigid connection operation is performed. Can be performed easily.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, not only the hinge coupling part shown in the embodiment but various hinge coupling structures can be adopted. Various connecting members can be used. For example, the receiving beam side connecting member may be a reinforcing bar with a protruding tip, and the pile side and the receiving beam side connecting member may be connected bars, bonding materials. , And may be connected by welding, bonding, or bonding using a binding material or the like. Further, in addition to a bar such as a reinforcing bar, the connecting member may be formed of a shape steel or a plate material. Alternatively, a plurality of recesses may be formed with a short length.

It is sectional drawing of the road width direction of the road expansion structure which shows Example 1 of this invention. It is sectional drawing of the principal part same as the above. It is a front view of the receiving beam on a foundation pile same as the above. It is the top view which made a part of receiving beam on a foundation pile into a cross section same as the above. FIG. 3 is a cross-sectional view of the road extension structure in the road length direction. It is a frame schematic diagram of a road expansion structure same as the above. It is a front view of the road length direction of the road expansion structure which has a gradient same as the above. It is a front view of the foundation pile provided with the pile side connection member which shows Example 2 of this invention. It is sectional drawing of the hinge coupling | bond part which shows Example 3 of this invention. It is sectional drawing of the road width direction in the construction process of the road expansion structure which shows Example 4 of this invention. It is sectional drawing of a road expansion structure same as the above. It is a front view of the receiving beam on the foundation pile which shows Example 5 of this invention.

1 Road T Valley side 2 Inclined surface T Mountain side 3 Inclined surface
11 Floor slab
12 Concrete foundation
13 Receiving beam
14 Foundation pile H1, H2 Hinge joint
21 Rigid structure
22, 22A Pile side connecting member
23 Lower recess
24 Left and right recesses
25 Beam-side connecting member
26 On-site concrete section
28 Bar (receiving beam side connecting member)

Claims (4)

In the road expansion structure that expands the road whose valley side forms an inclined surface, a plurality of foundation piles are erected in the road length direction with respect to the inclined surface, and a precast concrete receiving beam is provided between the foundation piles. A floor slab is provided on the receiving beam, and the receiving beam is rigidly connected to the foundation pile by a rigid connection structure. The rigid connection structure includes a pile-side connecting member protruding from the foundation pile, and an outer surface of the receiving beam. Receiving-side connecting members projecting to the pile, and a cast-in-place concrete part in which these pile-side and receiving-beam side connecting members are embedded , forming a recess in the side surface of the receiving beam, and in the recess formed in the side surface A road expansion structure characterized by projecting a receiving-side connecting member and embedding the concave portion in the cast-in-place concrete part . The foundation pile is erected on an inclined surface on the valley side of the road, a concrete foundation is provided on the valley side of the road, a floor slab is juxtaposed in the road length direction on the concrete foundation and the receiving beam, road extension construction according to claim 1 Kouki mounting, characterized in that it has connecting the concrete foundation and receiving beam. Road extension construction according to claim 1 or 2 Koki mounting, characterized in that the foundation pile erected alongside the road crossing direction. In the road expansion method for expanding a road whose valley side forms an inclined surface, a plurality of foundation piles are erected in the road length direction with respect to the inclined surface, and a precast concrete receiving beam is provided between the foundation piles. A floor slab is provided on the receiving beam, a pile-side connecting member is protruded from the foundation pile, the receiving beam has a recess on a side surface, and the receiving beam-side connecting member protrudes into the recess on the side surface of the receiving beam. set, and its road extension construction method, characterized by rigidly connected to the receiving beam to the foundation pile to these and pile side and receiving beam-side coupling member and the recess is embedded by concrete cast-in-place.

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