JP2008121265A - Foundation structure of fill, and construction method for foundation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation structure of fill, which enables safe construction without regulating the travel of a train and a vehicle, and a construction method for the foundation structure. <P>SOLUTION: The foundation structure 1, which is constructed on the fill 3 formed on original ground 2, comprises: a rod-like reinforcing material 4 which is embedded in the fill 3 in such a manner that an upper end is protruded from a slope; a solidified body 5 which is provided on the outer periphery of the reinforcing material 4, so as to fix the reinforcing material 4 to the fill 3; and a supporting portion 6 which is composed of vertical and horizontal beams 6a and 6b arranged in a grid pattern, and which is installed on the slope in the state of being connected to an upper end of the reinforcing material 4. On the horizontal beam 6b on the upper side of the supporting portion 6, a soundproof wall 9 for reducing a traveling sound of the train 8 traveling on a railroad track 7 is mounted along the railroad track 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a foundation for supporting structures such as soundproof walls and signals constructed on embankments formed by embedding soil so as to have a desired height during site construction or embankment. The present invention relates to a structure and a construction method for construction on a slope.

As a foundation constructed on the slope of the cut, for example, Patent Document 1 discloses a footing constructed near the ground surface so as to be substantially parallel to the support layer in the natural ground, and a support layer inserted through the footing. The foundation structure comprised from the tendon installed in the inside is disclosed. This foundation structure first excavates the sediment layer on the weak ground surface on the slope until the support layer is exposed, then places a tension material from this support layer into the strong support ground, and then The footing is constructed by placing concrete in the area where the deposited layer on the surface is removed, and finally, the tensioning material is fixed to the footing while giving tension to the tensioning material, and the footing is performed by the resistance to pulling out the tensioning material. It is intended to ensure stability.
JP 2000-120081

  However, in the method described in Patent Document 1, since the tension material is installed in the natural ground while applying tension to the tension material, a solid support ground for preventing the tension material from being pulled out is required in the natural mountain. . Therefore, there is a problem that it is difficult to apply to embankments without a solid support ground.

  In addition, when the tension material is installed on the embankment, if the original ground below the embankment is used as the supporting ground, the tension material must be inserted deep into the original ground to prevent the tension material from being pulled out. Therefore, the drilling time becomes long, and the embankment is left in an unstable state for a long time. Furthermore, the tendon material needs to have a large cross-sectional shape to resist the tension force, and therefore the diameter of the drilling hole becomes large, and the embankment may loosen during drilling or insertion of the tendon material, causing road surface deformation. There is sex. For these reasons, when the road surface of embankment is used as a track or road, it is necessary to stop the passage of trains and cars, and to drill holes and insert tension materials, etc. for safety reasons There was a problem.

  Then, this invention is made | formed in view of the above conventional problems, Comprising: Providing the foundation structure and construction method in the embankment which can be constructed safely, without restricting driving | running | working of a train or a car. With the goal.

  In order to achieve the above object, the foundation structure in the embankment of the present invention is a foundation structure for supporting a structure constructed on the embankment, and the inside of the embankment has an end projecting from the slope of the embankment. A bar-shaped reinforcing material embedded in the solid-state body, a solidified body that fixes the bar-shaped reinforcing material to the embankment, and a support unit that is installed on the slope and to which the end of the bar-shaped reinforcing material is connected. (First invention).

According to the foundation structure in the embankment according to the present invention, the bar-shaped reinforcing material and the embankment can be integrated by fixing the bar-shaped reinforcing material embedded in the embankment from the slope with the solidified body. Therefore, since the shear resistance force of the bar-shaped reinforcing material itself and the retaining function and clamping function against the embankment due to the pull-out resistance force of the bar-shaped reinforcing material act on the slope slip, the slip resistance force increases and the embankment Improves stability.
Moreover, it becomes possible to integrate a support part and the embankment in which the rod-shaped reinforcement material was installed by connecting the support part installed in a slope with a rod-shaped reinforcement material. Therefore, the support part and the embankment behave integrally with the load of the structure constructed on the embankment and the entire embankment resists, so the deformation resistance becomes stronger and the embankment is kept in a stable state. It becomes possible to support the object in a stable state.
Furthermore, the bar-shaped reinforcing material only needs to be embedded in the embankment, and it is not necessary to apply tension as in the conventional tension material, so that the bar-shaped reinforcing material can be embedded in a short time.

A second invention is characterized in that, in the first invention, a plurality of the bar-shaped reinforcing members are embedded in the embankment at predetermined intervals.
According to the foundation structure in the embankment according to the present invention, since a plurality of bar-shaped reinforcing materials are embedded in the embankment at predetermined intervals, the labor for moving the bar-shaped reinforcing material insertion device or the like is reduced, and the foundation can be obtained in a short time. Can be built.

According to a third invention, in the second invention, the plurality of rod-shaped reinforcing members are embedded in different directions.
According to the foundation structure in the embankment according to the present invention, since a plurality of bar-shaped reinforcing members are embedded radially in different directions, a substantially conical extraction made of a solidified body is provided around the bar-shaped reinforcing material and in a portion close to the slope. A resistor is formed. Due to the wedge effect of the resistor, the resistance of the bar-shaped reinforcing material to shearing is increased, and the deformation resistance of the entire embankment is also increased.

According to a fourth invention, in any one of the first to third inventions, the support portion is installed so that a lower edge thereof is positioned at a buttock.
According to the foundation structure in the embankment according to the present invention, it is possible to directly transmit the load of the structure to the tail as the lower edge of the support portion is positioned at the tail. Therefore, since the load of the structure is dispersed and supported by the embankment and the tail, the stability of the embankment is improved.

A fifth invention is characterized in that, in the fourth invention, the ground around the method bottom is reinforced by installation of piles, ground improvement or the like.
According to the foundation structure in the embankment according to the present invention, the ground around the hoshijiri is reinforced by placing a pile or improving the ground, so that the lower edge of the support portion located on the hoshijiri is supported more effectively. It becomes possible to do. In addition, the shearing force of the reinforced part acts against the slope tip failure where the sliding surface passes through the butt (FIG. 9) and the bottom failure where the sliding surface passes below the butt (FIG. 10). Resistance increases and stability of embankment improves. Further, the horizontal displacement of the butt is suppressed, and the banking can be prevented from sinking.

  The foundation construction method in the embankment of the sixth invention includes a filling step of drilling a hole in the embankment from the slope and filling the solidified material, and the rod-shaped reinforcing material so that the end protrudes from the slope An embedding step for embedding in the hole, an installation step for installing a support portion for attaching the structure on the slope, and a connection step for connecting the end portion of the rod-shaped reinforcing member and the support portion. It is characterized by that.

According to the foundation construction method in the embankment according to the present invention, a filling step of drilling a hole in the embankment from the slope and filling the solidified material, and a rod-shaped reinforcing material in the bore so that the end protrudes from the slope. It is possible to improve the stability of the embankment by integrating the bar-shaped reinforcing material and the embankment by providing the embedding process.
Further, by connecting the support portion to the bar-shaped reinforcing material, it becomes possible to improve the stability of the banking by integrating the support portion and the embankment on which the bar-shaped reinforcing material is installed.
Furthermore, since the bar-shaped reinforcing material only needs to be embedded in the embankment without applying tension as in the conventional tension material, the bar-shaped reinforcing material can be embedded in a short time.

In a sixth aspect based on the sixth aspect, the filling step, the embedding step, and the installation step are performed in an arbitrary order.
According to the foundation construction method for embankment according to the present invention, the filling step, the embedding step, and the installation step can be performed in an arbitrary order, and thus can be applied to various sites.

  According to the foundation structure and construction method in the embankment of the present invention, it is possible to construct the foundation safely and in a short time without restricting the passage of trains and cars. It is also possible to reliably prevent abnormalities such as deformation and slippage of the embankment after the structure is installed on the embankment.

Hereinafter, preferred embodiments of the foundation structure in the embankment according to the present invention will be described in detail with reference to the drawings. In this embodiment, the case where the foundation for installing a soundproof wall in the embankment for railroads is demonstrated, but it is not limited to the embankment for railroads, It is applicable to general embankment.
FIG.1 and FIG.2 shows the basic structure 1 which concerns on 1st embodiment of this invention, and is a cross-sectional view and a side view, respectively.

  As shown in FIG. 1 and FIG. 2, the foundation structure 1 constructed on the embankment 3 formed on the raw ground 2 is a bar shape embedded in the embankment 3 so that the end portion protrudes from the slope of the embankment 3. Reinforcing material 4, which is provided on the outer periphery of the bar-shaped reinforcing material 4, is composed of a solidified body 5 that fixes the bar-shaped reinforcing material 4 to the embankment 3, and vertical beams 6 a and horizontal beams 6 b arranged in a lattice shape. A support portion 6 that is connected to the upper end portion of the material 4 and is installed on the slope, and the transverse beam 6b on the upper side of the support portion 6 is used to reduce the traveling noise of the train 8 that travels on the track 7. A soundproof wall 9 is attached along the track 7.

A plurality of rod-shaped reinforcing members 4 are inserted into the holes 10 that are radially drilled in different directions at a predetermined interval. Note that the holes 10 are formed not only in the plane of FIG. 1 but also in the depth direction of the plane. In addition, the rod-shaped reinforcing material 4 is installed so that most of the rod-shaped reinforcing material 4 is embedded in the hole 10, and the upper end portion penetrates the insertion hole 6 c provided in the support portion 6 and protrudes from the support portion 6. A screw member such as a nut is screwed onto the upper end portion to be connected to the vertical beam 6a. In the present embodiment, as the rod-shaped reinforcing member 4, for example, a reinforcing bar having a large shearing force is used.
Further, the rod-shaped reinforcing material 4 is fixed so as to be integrated with the embankment 3 via the solidified body 5, and the rod-shaped reinforcing material 4 is prevented from coming out of the hole 10.

  The solidified body 5 is formed by filling cement milk, mortar, or the like in a section from the lower edge of the rod-shaped reinforcing member 4 to the hole 10 so as to surround the outer periphery of the rod-shaped reinforcing member 4 in the hole 10. It is fixed to.

  The vertical beams 6a of the support portion 6 are installed at regular intervals in the longitudinal direction of the embankment 3 within the range where the soundproof wall 9 is installed, and the horizontal beams 6b are installed at predetermined intervals in the slope direction of the slope. . In the present embodiment, RC beams are used for the vertical beam 6a and the horizontal beam 6b.

Next, the foundation construction method of this embodiment will be described according to the construction procedure.
3-5 is a figure which shows the construction procedure of the foundation of the embankment 3 which concerns on this embodiment.
First, as shown in FIG. 3, the hole drilling machine 11 is installed on the raw ground 2, and the embankment 3 is drilled from the slope to form the hole 10. The holes 10 are drilled radially from a predetermined position in different directions.
And although not shown in figure, solidifying materials, such as cement milk, are filled to the hole bottom of the hole 10 via injection pipes, such as a hose, with the solidification material injection | pouring pump installed on the raw ground 2.

  Next, as shown in FIG. 4, before the solidified material is solidified, the rod-shaped reinforcing material 4 is inserted into the hole 10 so that the end of the rod-shaped reinforcing material 4 protrudes from the slope. Thus, when the solidified material is hardened by inserting the rod-shaped reinforcing material 4 into the hole 10 filled with the solidified material, the solidified body 5 and the rod-shaped reinforcing material 4 are integrated and fixed to the embankment 3. become.

Finally, as shown in FIG. 5, the upper end portion of the rod-shaped reinforcing member 4 is inserted into the insertion hole 6 c of the support portion 6, and the support portion 6 is adjusted so that the upper end portion protrudes from the upper surface of the support portion 6. Install on the surface. The foundation is constructed by screwing a screw member into the upper end portion of the rod-shaped reinforcing member 4 and connecting the support portion 6 to the rod-shaped reinforcing member 4.
After constructing the foundation on the slope of the embankment 3 according to the procedure described above, the soundproof wall 9 is attached to the support portion 6.

  In the construction procedure of the present embodiment, first, the hole 10 is filled with a solidifying material, then the rod-shaped reinforcing material 4 is embedded in the hole 10, and then the support portion 6 is installed on the slope. However, it is not limited to this order, and may be the order of (a), (b) or (c) as shown below. For example, (a) First, the rod-shaped reinforcing material 4 is inserted into the hole 10, then the hole 10 is filled with a solidifying material, and the support portion 6 is installed on the slope, (b) First, on the slope After the support portion 6 is installed, the hole drill of the hole drilling machine 11 is inserted into the insertion hole 6c of the support portion 6 to drill the hole 10, and the hole 10 is filled with a solidifying material. (C) First, the support portion 6 is installed on the slope, and then the drilling drill of the drilling machine 11 is inserted into the insertion hole 6 c of the support portion 6. After the hole 10 is drilled, the rod-shaped reinforcing material 4 is embedded in the hole 10 and finally the hole 10 is filled with a solidifying material. Good. Further, in (b) and (c), the support portion 6 having the insertion hole 6c is installed on the slope, and the drilling drill of the drilling machine 11 is inserted into the insertion hole 6c of the support portion 6 so as to obtain the hole 10. However, the present invention is not limited to this, and the support portion 6 without the insertion hole 6c is installed on the slope, and the insertion hole 6c and the hole 10 are continuously drilled by the drilling machine 11. You may use the method to do.

  According to the foundation structure 1 constructed as described above, the bar-shaped reinforcing material 4 embedded in the embankment 3 from the slope and the outer periphery of the bar-shaped reinforcing material 4 are provided. By comprising the solidified body 5 to be fixed, the rod-shaped reinforcing material 4 and the embankment 3 can be integrated. Accordingly, the shearing force of the bar-shaped reinforcing member 4 and the adhesion resistance of the solidified body 5 against the shearing action act on the slope slip, so that the slip resistance is increased and the stability of the embankment 3 is improved.

  Moreover, the support part 6 is installed along the slope, and the upper end part of the bar-shaped reinforcing material 4 is connected to the support part 6 so that the support part 6 and the embankment 3 on which the bar-shaped reinforcing material 4 is installed are integrated. be able to. Therefore, the support portion 6 and the embankment 3 behave integrally with the load of the sound barrier 9 constructed on the embankment 3 and the embankment 3 as a whole resists, so that the deformation resistance becomes stronger and the embankment 3 is stabilized. It is possible to keep in the state.

  Furthermore, the bar-shaped reinforcing material 4 only needs to be embedded in the embankment 3, and it is not necessary to apply tension as in the conventional tension material, so that the bar-shaped reinforcing material 4 can be embedded in a short time.

  Further, since a plurality of the rod-shaped reinforcing members 4 are embedded in the embankment 3 at predetermined intervals, the labor for moving the rod-shaped reinforcing member 4 insertion device, the hole drilling machine 11, the solidifying material filling device, etc. is reduced. It is possible to build a foundation in a short time. Further, since the rod-shaped reinforcing members 4 are radially embedded in different directions, a substantially conical pulling resistor made of the solidified body 5 is formed around the rod-shaped reinforcing members 4 and in the portion close to the slope. Due to the wedge effect of the resistor, the resistance of the bar-shaped reinforcing member 4 to the shear pulling is increased, and the deformation resistance of the whole embankment 3 is also increased.

  Next, another embodiment of the present invention will be described. In the following description, parts corresponding to those using the same technique as in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.

6 and 7 show a basic structure 21 according to the second embodiment of the present invention, and are a cross-sectional view and a side view, respectively.
As shown in FIGS. 6 and 7, the foundation structure 21 includes a bar-shaped reinforcing member 4, a solidified body 5, a support portion 22 installed so that the horizontal beam 6 b on the lower edge is located at the heel, It consists of a pile 23 for reinforcing the ground.
The pile 23 is embedded in the raw ground 2 of the butt to reinforce the ground around the butt and is connected to the horizontal beam 6b on the lower edge of the support 22 to support the support 22. The piles 23 are installed in the raw ground 2 of the hoshiri at regular intervals in the longitudinal direction of the embankment 3.
In all the embodiments described above, the support portions 6 and 22 may be constructed by placing them on site or using a precast material.

  FIG. 8 is a cross-sectional view showing the foundation structure 31 according to the third embodiment of the present invention. As shown in FIG. 8, the foundation structure 31 according to the third embodiment of the present invention includes a support portion that is installed so that the rod-shaped reinforcing member 4, the solidified body 5, and the lower edge horizontal beam 6 b are located at the heel. 22 and a reinforcing body 33 whose ground has been improved in order to reinforce the ground of the Houshiri.

  The reinforcing body 33 is formed by performing a cement stabilization process or the like on the ground around the buttock in the longitudinal direction of the buttock, reinforces the ground around the buttock, and also forms a transverse beam at the lower edge of the support portion 22. The entire support portion 22 is supported via 22b. The reinforcing body 33 is extended along the longitudinal direction of the embankment 3.

  According to the foundation structures 21 and 31 constructed as described above, the load of the structure can be directly transmitted to the legal butt by being installed so that the lower edge of the support portion 22 is located at the butt. It becomes possible. Therefore, since the load of the soundproof wall 9 is dispersed and supported by the embankment 3 and the tail, the embankment 3 does not need to support the load of the soundproof wall 9 and the stability of the embankment 3 is improved.

  Moreover, since the raw ground 2 around the butt is reinforced by the pile 23 and the reinforcing body 33, it is possible to support the lower edge of the support portion 22 located at the butt. Further, the pile 23 and the reinforcing body 33 that are reinforced with respect to the slope tip failure (FIG. 9) through which the sliding surface passes through the hoshiri and the bottom fracture (FIG. 10) through which the sliding surface passes below the hoshijiri resists. The stability of the embankment 3 is improved. Further, the horizontal displacement of the bottom edge is suppressed, and the banking 3 can be prevented from sinking.

  In all the embodiments described above, the case where a reinforcing bar is used as the rod-shaped reinforcing member 4 has been described. However, the material and shape are not limited to this, and the shear strength determined by design or the like is used. If present, the material may be made of FRP or the like, and the shape may be a cylinder or the like.

  In all of the above-described embodiments, the case where the RC material is used as the support portions 6 and 22 has been described. However, the present invention is not limited to this, and may be made of a precast concrete material, a steel material, an SRC material, or the like. .

  Further, in all the embodiments described above, the case where the beams are installed in a lattice shape as the support portions 6 and 22 has been described. However, the present invention is not limited to this, and as shown in FIG. Concrete 40 may be laid on the entire slope, or a plate-like member 41 may be placed on the slope as shown in FIG.

  In all the embodiments described above, the case of constructing a foundation for installing the soundproof wall 9 on the embankment 3 for the track 7 has been described. However, the present invention is not limited to the soundproof wall, and is installed on the embankment 3. For example, it can be applied to general structures such as signals.

It is a cross-sectional view which shows the basic structure which concerns on 1st embodiment of this invention. It is a side view showing the foundation structure concerning a first embodiment of the present invention. It is a figure which shows the construction procedure of the foundation structure of the embankment which concerns on this embodiment. It is a figure which shows the construction procedure of the foundation structure of the embankment which concerns on this embodiment. It is a figure which shows the construction procedure of the foundation structure of the embankment which concerns on this embodiment. It is a cross-sectional view which shows the basic structure which concerns on 2nd embodiment of this invention. It is a side view which shows the basic structure which concerns on 2nd embodiment of this invention. It is a cross-sectional view showing the basic structure according to the third embodiment of the present invention. It is a figure which shows the example of the effect which concerns on this invention. It is a figure which shows the example of the effect which concerns on this invention. It is a figure which shows the other construction example of the support part which concerns on this invention. It is a figure which shows the other construction example of the support part which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foundation structure 2 Original ground 3 Embankment 4 Bar-shaped reinforcement 5 Solidified body 6 Support part 6a Vertical beam 6b Horizontal beam 6c Insertion hole 7 Rail 8 Train 9 Soundproof wall 10 Hole 11 Drilling machine 21 Basic structure 22 Support part 22a Vertical beam 22b Horizontal beam 23 Pile 31 Foundation structure 33 Reinforcement body 40 Concrete 41 Plate-like member

Claims (7)

It is a basic structure to support the structure built on the embankment,
A rod-shaped reinforcing material embedded in the embankment so that the end protrudes from the slope of the embankment;
A solidified body for fixing the rod-shaped reinforcing material to the embankment;
A foundation structure in embankment, comprising a support portion installed on the slope and connected to the end of the bar-shaped reinforcing material.   The foundation structure in the embankment according to claim 1, wherein a plurality of the bar-shaped reinforcing members are embedded in the embankment at predetermined intervals.   The foundation structure in the embankment according to claim 2, wherein the plurality of bar-shaped reinforcing members are embedded in different directions.   The foundation structure in the embankment according to any one of claims 1 to 3, wherein the support portion is installed such that a lower edge thereof is located at a heel.   The foundation structure in the embankment according to claim 4, wherein the ground around the butt is reinforced by installation of piles, ground improvement, or the like. In the construction method of the foundation to support the structure built on the embankment,
A filling step of drilling holes in the embankment from the slope and filling the solidified material,
An embedding step of embedding a rod-shaped reinforcing material in the hole such that an end protrudes from the slope;
An installation step of installing a support for attaching the structure on the slope;
A foundation construction method for embankment comprising a connecting step of connecting the end portion of the bar-shaped reinforcing member and the support portion.   The foundation filling method according to claim 6, wherein the filling step, the burying step, and the setting step are performed in an arbitrary order.

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