JP3978371B2 - Slope retaining wall construction method and slope retaining wall structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a retaining wall having a slope such as a cut slope, a reinforcing member for reinforcing the retaining wall, and a specific structure of the retaining wall.
[0002]
[Prior art]
Conventionally, a block retaining wall is known as a slope retaining wall for stabilizing and protecting the slope. This block retaining wall is formed by stacking a large number of retaining wall blocks along the slope.
[0003]
Furthermore, in recent years, a construction method using a precast plate made of concrete is known. In this construction method, a reinforced soil surface is formed by placing a large number of precast plates side by side on a slope, and driving a rod-shaped reinforcing material into each precast plate from the outside and integrating them with mortar. (See Japanese Patent No. 2530565).
[0004]
[Problems to be solved by the invention]
Since the retaining wall block and the precast plate are made of concrete and have a large weight, it is not easy to stack them one by one along the slope. Also, the work efficiency decreases as the number increases. In addition, the greater the thickness of the retaining wall block or precast plate, the greater the burden on the operator, so there is a significant limitation in increasing the retaining wall thickness. Furthermore, there is a drawback that it is difficult to construct a steep slope.
[0005]
In addition, it is difficult to effectively reinforce the retaining wall with the conventional technology. In other words, as a means to reinforce the retaining wall, it is effective to embed reinforcing bars, but as described above, each of the reinforcing bars is embedded in a large number of retaining wall blocks and precast plates to make large-scale reinforced concrete. Building a retaining wall is extremely difficult in practice.
[0006]
In view of such circumstances, the present invention provides a technique capable of efficiently constructing a slope retaining wall without being significantly restricted by the slope of the slope and the thickness of the retaining wall, and more preferably the reinforcement thereof. The purpose is to provide a technology that facilitates this.
[0007]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the present invention is a method for constructing a retaining wall along a slope, and a reinforcing member disposing step of disposing a reinforcing member outside the slope. A covering material installation step of installing a covering material on the further outer side of the reinforcing member so as to cover the reinforcing member and the slope, and a fluidized concrete in a region between the installed covering material and the slope . injected into and a concrete injection process of embedding the reinforcing member to the concrete by solidifying in the same area, the reinforcing member disposing step, respectively, from the outside to a plurality of locations of the slopes locking By connecting the intermediate frame having a frame body to the projecting end of each lock bolt, the process of driving the bolt into the state where the end of the lock bolt projects from the slope, and the projecting end of each lock bolt. A step in which the intermediate frame is disposed in a posture that extends along the slope and covers the slope, and a plurality of the intermediate frames are arranged in a direction along the slope. In the covering material installation step, the covering material is installed on the outer side of the embedded reinforcing material so as to cover the embedded reinforcing material and the slope. The intermediate frame and the embedded reinforcing material body including the bar are connected via a connecting material, and in the concrete pouring step, the intermediate frame, the bar, and the connecting material are embedded as the reinforcing member in the concrete. Is.
[0008]
In this method, concrete is poured between the slope and the covering material installed on the outside of the slope and solidified to form a retaining wall. Therefore, as in the past, many retaining wall blocks and precast plates are used as the slope. Construction can be performed more efficiently than the method of arranging them along. In addition, the slope of the slope is not easily restricted, and a thick retaining wall can be easily constructed. On the other hand, the covering material may be thin and light, and the burden on the operator for the arrangement is small.
[0009]
In this construction method, the retaining wall can be easily reinforced by embedding a reinforcing member in the concrete . Specifically, a reinforcing member disposing step for disposing a reinforcing member on the outside of the slope, and a covering material installation for covering the reinforcing member and the slope on the further outside of the reinforcing member. comprising steps a, a concrete injection process of embedding the reinforcing member to the concrete by regions solidified by injecting concrete in a fluid state in the same region between the slopes and the installation was dressing.
[0010]
Moreover, the reinforcing member disposing step includes a step implantation into a state in which ends of a plurality of locations that are implanted outside from their respective locking bolt the locking bolt relative to the slope face projects from slopes, By connecting an intermediate frame having a frame to the projecting end of each lock bolt, each intermediate frame extends along the slope with a gap from the slope and covers the slope. Since it includes a step of disposing a frame and a step of connecting the intermediate frames to each other via a plurality of bar members in a direction along the slope, a reinforcing member combined with the ground forming the slope is easy. By embedding the embedded reinforcing material main body in the reinforcing member in the concrete , a robust retaining wall integrated with the ground can be easily constructed.
[0011]
Further, by connecting the covering material and the embedded reinforcing material body in the covering material installing step, the covering material can be stably held at a predetermined position using the embedded reinforcing material.
[0012]
Further, the present invention is embedded in the concrete of the slope retaining wall in which the concrete is filled in the region between the slope and the covering material installed so as to cover the slope at a distance from the slope. A plurality of reinforcing members that reinforce the slope retaining wall by being driven from the outside to a plurality of locations on the slope face, with their end portions protruding from the slope face. A lock bolt, an intermediate frame that has a frame and is connected to a protruding end portion of each lock bolt so as to cover the slope with a space from the slope, and the intermediate frame A plurality of bar members that connect each other in the direction along the slope, and a connecting member that connects the embedded reinforcing material main body including the intermediate frame and the bar member and a covering material installed on the outside thereof. Is.
[0013]
According to the reinforcing member of this can be held in a stable state the dressing by the connection between the embedded reinforcement body dressing.
[0014]
The embedded reinforcement main body has a frame, and is connected to the protruding end of each lock bolt so as to cover the slope with a space from the slope, and the intermediate frame, Since it includes a plurality of bar members that connect the intermediate frames in the direction along the slope, it is easy to transport and a suitable embedded reinforcement main body corresponding to the size regardless of the size of the slope Can be easily constructed on site.
[0015]
Moreover, since the said intermediate | middle frame has a frame, when the said concrete penetrate | invades into the clearance gap part and solidifies, integration with a main body unit and concrete is accelerated | stimulated.
[0016]
In the present invention, a reinforcing member is disposed outside the slope in a state of being coupled to the slope, and a covering material is installed so as to cover the reinforcing member and the slope from the outside. It is a slope retaining wall structure in which concrete is poured between the slopes and solidified to solidify the intermediate frame, bar, and connecting material of the reinforcing member in the concrete .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described with reference to the drawings.
[0018]
In the retaining wall structure shown in FIGS. 1 and 2, a plurality of rod-like lock bolts 12 are driven into the slope 10 from the outside. In the illustrated example, the lock bolt 12 is driven from the substantially normal direction to the slope 10, and the depth of the drive is such that the end of each lock bolt 12 protrudes outward from the slope 10 by an appropriate dimension. It has become.
[0019]
An intermediate frame (main body unit) 14 is connected to the end of each lock bolt 12. Each intermediate frame 14 has a shape that extends along the slope 10 and is juxtaposed along the slope 10. The intermediate frames 14 are interconnected, and as a whole, an embedded reinforcement main body having a shape covering the slope 10 is constructed.
[0020]
On the other hand, a foundation 16 is placed on the bottom of the slope 10, and a covering material is placed thereon. In this embodiment, a plurality of design panels 18 are stacked upright on the foundation 16 to constitute a covering material.
[0021]
In the illustrated example, the design panel 18 is disposed with an appropriate gradient (in the illustrated example, a slightly larger gradient than the gradient of the slope 10) so as to cover the intermediate frame 14 and the slope 10. Further, these design panels 18 are connected to the intermediate frame 14 via a plurality of bar members 22 and 24. The bar 22 plays a role of connecting the intermediate frames 14 to each other and, together with the bar 24, plays a role of a connecting material for connecting the intermediate frame 14 and the design panel 18.
[0022]
Then, the concrete in the region between the slopes 10 and the design panel 18 is injected in a fluid state, by solidifying the same region, the retaining wall to protect the slope 10 have been constructed. In addition, the entire retaining wall is effectively reinforced by embedding the reinforcing members including the intermediate frames 14 and the bar members 22 and 24 therein.
[0023]
Next, the details of this retaining wall structure and its construction method will be described. The following steps are repeated for each step from the bottom to the top of the slope 10.
[0024]
1) Driving process The lock bolt 12 is driven in a substantially normal direction with respect to the slope 10 at an appropriate height position (initially the lowest position). Each of the lock bolts 12 is preferably long and high in strength, and is preferably made of a steel material or the like.
[0025]
As the specific driving structure, for example, the structure shown in FIG. In the figure, a hole 26 having a diameter larger than that of the lock bolt 12 is drilled in advance in the ground forming the slope 10, and the lock bolt 12 and the hole 26 are inserted into the hole 26 after the hole 26 is inserted. A grout material 28 is filled so as to fill a gap with the inner surface.
[0026]
2) Embedded Reinforcing Material Arrangement Step An intermediate frame 14 corresponding to a main body unit of embedded reinforcing material is connected to the protruding end portion of each lock bolt 12.
[0027]
Each intermediate frame 14 has a rectangular frame 30 as shown in FIGS. The upper and lower frames of the frame body 30 are interconnected via a reinforcing plate 32 extending in the vertical direction, and the intermediate portion of the reinforcing plate 32 and the left and right frames of the frame body 30 are interconnected via a reinforcing plate 34. . A connecting portion 36 connected to the lock bolt 12 is provided at a central position of the reinforcing plate 32.
[0028]
As shown in FIG. 3B, the connecting portion 36 has a through hole 37 into which the lock bolt 12 can be inserted, and a spherical seat 38 in which the front surface of the peripheral portion of the through hole 37 is recessed in a spherical shape. ing. Then, nuts 40A and 40B that are screwed with the lock bolts 12 are arranged on both the front and back sides of the through hole 37 with the lock bolts 12 inserted therein, and are tightened to extend in the direction along the slope 10. Thus, the intermediate frame 14 is fastened to the lock bolt 12. Furthermore, by setting the end surface 42 of the nut 40B on the spherical seat 38 side to be a spherical surface, the attachment angle of the intermediate frame 14 to the lock bolt 12 can be finely adjusted.
[0029]
Each intermediate frame 14 is interconnected in the same direction via a long bar 22 extending in the lateral direction. The left and right frames of each intermediate frame 14 are provided with a plurality of rod receiving portions 48 arranged vertically along this frame. Each rod receiving portion 48 has a substantially L shape in a side view that protrudes forward from the left and right frames and has a protruding end portion bent upward. The rod 22 is placed on each rod receiving portion 48, and is fixed to the intermediate frame 14 side by means such as screwing or welding.
[0030]
By connecting the intermediate frames 14 with each other through the bar material 22, a frame-like embedded reinforcing material that covers the slope 10 from the outside is constructed over a wide range.
[0031]
3) Coating material installation process A coating material is constructed by arranging a large number of design panels 18 vertically and horizontally and interconnecting them. As shown in FIG. 1, the covering material is installed at a distance from the slope 10 so as to cover the intermediate frame 14 and the slope 10 from the outside.
[0032]
That is, in this embodiment, the covering material is also divided into a large number of design panels 18, and it is possible to install a covering material with a large area by connecting the design panels 18 to each other.
[0033]
For example, screwing or adhesion may be used for the connection between the design panels 18, and the connection between the panels becomes easier if a fitting-type connector 64 as shown in FIG. 6 is used. The illustrated connector 64 is formed by integrating a flat base wall 64a, a support wall 64b protruding from the base wall 64a, and a mountain-shaped locking wall 64c formed at the end of the support wall 64b. Have. On the other hand, a concave groove 19 as shown in FIG. 7A is formed on the left and right side surfaces of each design panel 18 so that the support wall 64b of the connecting portion 64 is inserted between the design panels 18. However, the design panels 18 can be connected to each other via the connecting portion 64 by fitting the locking wall 64 c at the tip of the support wall 64 b into the concave groove 19.
[0034]
Furthermore, in this embodiment, the process of stably holding the design panel 18 in the assembled state is performed by connecting the design panel 18 to the intermediate frame 14.
[0035]
Specifically, in this construction, a bar 24 as shown in FIGS. 5A and 5B and FIGS. 7A and 7B is used, and the design panel 18 and the bar 22 are interposed via the bar 24. And are connected.
[0036]
The connection structure between the bar member 24 and the bar member 22 and the connection structure between the bar member 24 and the design panel 18 are not particularly limited, and for example, means such as welding or adhesion may be used. It shows to Fig.7 (a) (b).
[0037]
FIG. 5 shows an example in which the bar members 22 and 24 are connected to each other by a dedicated connector 50 at the intersection. The illustrated connector 50 includes a cylindrical base 52, a flat receiving plate 53 formed on the upper surface thereof, and a pressing plate 54 fastened to the receiving plate 53.
[0038]
The base 52 has an inner diameter through which the bar 22 is inserted with almost no gap, and is fixed to the bar 22 in the inserted state. On the other hand, the presser plate 54 integrally includes a presser portion 54a having a substantially semicircular cross section that is fitted to the bar member 24 from above and a flat plate-like fastening portion 54b that extends from the presser portion 54a to the left and right outer sides. Have. Then, in a state in which the holding portion 54a is fitted to the bar 24, each fastening portion 54b is fastened to the receiving plate 53 on the base 52 side by, for example, a bolt 55 and a nut 56 so that the bar 24 is connected. It is connected to the bar 22 in an intersecting state via the tool 50.
[0039]
For fastening the fastening portion 54b and the receiving plate 53, for example, a dedicated fastening pin may be used in addition to the bolt 55 and the nut 56. Further, if a large number of protrusions are formed on the back surface of the presser portion 54a and are made to bite into the back surface of the bar member 24, the connection strength is improved.
[0040]
On the other hand, FIGS. 7A and 7B show a connection structure between the bar 24 and the design panel 18. A bracket 60 extending in the horizontal direction of the panel is fixed to the back surface of the design panel 18. The bracket 60 integrally includes a bottom wall 60a that protrudes backward from the back surface of the panel and a side wall 60b that extends further upward from the end portion of the bracket 60, and a plurality of locking grooves 62 arranged in the lateral direction of the panel on the side wall 60b. Is formed.
[0041]
Each locking groove 62 has an inverted L shape extending downward from the upper end of the side wall 60b and extending laterally from the inner end thereof.
[0042]
The rod member 24 has a diameter that can enter the locking groove 62 (that is, a diameter smaller than the width of the locking groove 62), and a large-diameter flange 24b is locally formed at the tip thereof. Yes. The flange portion 24 b has a diameter larger than the width of the locking groove 62.
[0043]
Therefore, in this structure, the portion of the bar 24 immediately before the flange portion 24b is inserted from the upper end (open end) into the inverted L-shaped locking groove 62, and the inverted L-shaped The flange 24b of the bar member 24 is locked to the side wall 60b of the bracket 60 by intruding to the back end of the locking groove 62 along the shape.
[0044]
4) Concrete pouring step As shown in FIG. 1, the region between the design panel 18 and the slope 10 in the state where the design panel 18 is connected to the intermediate frame 14 via the bar members 22 and 24 as described above. The concrete 26 in a fluid state is poured into the tank and left as it is to be solidified in the same region. By this process, a retaining wall that protects the slope 10 from the outside is constructed, and the embedded reinforcing material (the intermediate frame 14 and the bar members 22 and 24) is embedded in the retaining wall.
[0045]
Here, since each intermediate frame 14 has a frame shape, when the concrete 26 enters the gap portion, the integration of the intermediate frame 14 and the concrete 26 is promoted, and the retaining wall strength is further improved. To do. Further, by forming the irregularities 22a and 24a on the surfaces of the bars 22 and 24 as shown in the figure, the integrity of the bars 22 and 24 and the concrete 26 is improved.
[0046]
After the above steps 1) to 4) are performed and the lowermost part of the retaining wall is constructed, the steps 1) to 4) are repeated on top of it to finally have a desired height. A concrete retaining wall can be easily constructed. In addition, a retaining wall having a desired thickness can be constructed without hindrance only by appropriately setting the interval between the design panel 18 and the slope 10.
[0047]
In the second and subsequent steps 2), it is preferable that the intermediate frames 14 adjacent in the vertical direction as well as in the horizontal direction are interconnected. In the example shown in FIG. 5, the bolt portions 44 protrude upward and downward from the upper and lower surfaces of the frame 30 of the intermediate frame 14 so that the bolt portions 44 face each other when the intermediate frame 14 is lined up and down. The upper and lower ends of a connecting nut (cylindrical body in which an internal thread is engraved) is screwed to these bolt portions 44, so that the intermediate frames 14 are connected to each other via the connecting nut 46. Are connected in the vertical direction.
[0048]
The present invention is not limited to the method of executing the steps 1) to 4) step by step in the vertical direction. For example, you may make it perform each process 1) -4) collectively over the up-down direction whole region of a slope.
[0049]
In the illustrated example, each process is advanced from the lower side to the upper side of the slope 10, but conversely, each process is advanced from the upper side to the lower side of the slope 10. Also good.
[0050]
【The invention's effect】
As described above, the present invention forms a retaining wall by injecting concrete into a region between the slope and the covering material installed so as to cover the slope, so that the slope of the slope is formed. The sloped retaining wall can be efficiently constructed without any significant restrictions on the thickness of the retaining wall and can be easily reinforced.
[0051]
More specifically, by embedding a reinforcing member including a plurality of lock bolts , an intermediate frame connected to the end of each lock bolt , and a bar member connecting these intermediate frames , in the concrete, The integration of the surface and the retaining wall can be promoted, and the ground itself forming the slope can be effectively reinforced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a slope retaining wall structure according to an embodiment of the present invention.
FIG. 2 is a partial sectional perspective view showing the slope retaining wall structure.
3A is a cross-sectional view showing a lock bolt insertion structure and a connection structure between the lock bolt and the intermediate frame in the slope retaining wall structure, and FIG. 3B is a cross-sectional view showing details of part A in FIG. FIG.
4A is a side view of an intermediate frame used in the slope retaining wall structure, and FIG. 4B is a front view.
FIG. 5A is a plan view showing a connecting structure of bars in the slope retaining wall structure, and FIG. 5B is a front view thereof.
FIG. 6 is a perspective view showing a connection structure between design panels used in the slope retaining wall structure.
7A is a perspective view showing a connection state between the design panel and the bar, and FIG. 7B is a cross-sectional side view thereof.
[Explanation of symbols]
10 slope 12 rock bolt 14 intermediate frame (main unit)
18 Design panel 22, 24 Bar (connecting material)
26 concrete 36 connecting part

Claims (3)

A method for constructing the retaining wall along the slope,
A reinforcing member disposing step of disposing a reinforcing member outside the slope;
A covering material installation step of installing a covering material on the further outer side of the reinforcing member so as to cover the reinforcing member and the slope;
And a concrete injection process of embedding the reinforcing member to the concrete by regions solidified by injecting concrete in a fluid state in the same region between the slopes and the installation was dressing,
The reinforcing member disposing step includes driving a lock bolt into each of a plurality of locations on the slope from the outside so that the end of the lock bolt protrudes from the slope, By connecting intermediate frames having a frame to the projecting end, each intermediate frame is arranged in such a way that each intermediate frame extends along the slope and is covered with the slope. And a step of connecting the intermediate frames to each other through a plurality of bar members in a direction along the slope.
In the covering material installation step, the embedded reinforcing material main body including the covering material, the intermediate frame, and the bar material by installing a covering material on the outer side of the embedded reinforcing material so as to cover the embedded reinforcing material and the slope. Are connected via a connecting material,
In the concrete pouring step, the intermediate frame, the bar, and the connecting material are embedded as the reinforcing member in the concrete . By embedding in the concrete a slope retaining wall filled with concrete in a region between the slope and the covering material installed so as to cover the slope at a distance from the slope. A reinforcing member for reinforcing the surface retaining wall,
  A plurality of lock bolts installed respectively in a state in which the end portion protrudes from the slope by being driven from the outside with respect to a plurality of places of the slope;
  An intermediate frame that has a frame and is disposed so as to cover the slope with a distance from the slope by being connected to the protruding end of each lock bolt;
  A plurality of bar members connecting the intermediate frames in a direction along the slope;
  A connecting material for connecting the embedded reinforcing material main body including the intermediate frame and the bar material and a covering material installed on the outside thereof;
A reinforcing member for a slope retaining wall, comprising: The reinforcing member of the slope retaining wall according to claim 2 is disposed in a state of being coupled to the slope on the outside of the slope, and a covering material is installed so as to cover the reinforcement member and the slope from the outside, The slope holding is characterized in that the intermediate frame, the bar, and the connecting material of the reinforcing member are embedded in the concrete by injecting and solidifying the concrete between the covering and the slope. Wall structure.

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