JPS60138121A - Retaining wall and construction work thereof - Google Patents

Abstract

PURPOSE:To raise the efficiency of construction work for retaining walls by a method in which wall pieces are set by contacting their both end portions with the coupling faces of unit shape steels erected by turning their longitudinal directions upwards, having couplers to be connected with tension cables on the back, for constructing strong retaining wall. CONSTITUTION:H-shape steels 4 are erectly set by turning their longitudinal directions upwards at given intervals. One end sides 6a and the other end sides 6b of the blocks 6 are mutually contacted and set on the first coupling faces 4a of the H-shape steels 4 and the coupling faces 4b of the other side of the H-shape steels 4. Tension cables 22 are attached through couplers 24 to the backs of the H-shape steels 4 positioned on the backs of the retaining wall 2. The coupler 24 consists of a fixer 26 and an attachment 28. The wall pieces can thus be strongly supported and the retaining wall having high strengths can be constructed with simplified assembling operations.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a retaining wall and its construction method, and in particular, it is used to firmly construct a retaining wall and to maintain the foundations and walls of roads, railways, etc. by embankment construction. Concerning retaining walls and their construction methods.

[Technical Background of the Invention] Retaining walls are used to protect land,
Due to topographical conditions, slopes with exposed soil cannot maintain stability, or when building roads or railways adjacent to rivers, lakes, etc., they may be used to protect slopes or provide footing. It is a structure that is constructed.

Some retaining walls are constructed by stacking and connecting plate-shaped blocks that serve as wall pieces.

[Problems with the background art] However, in a retaining wall constructed by simply stacking blocks one on top of the other and connecting them one after the other, a large ridge of embankment acts on the back of the retaining wall. This has the disadvantage that the retaining wall is prone to collapse and the embankment cannot be kept stable for a long period of time. In addition, it is necessary to lock the blocks with high precision, which makes the assembly work troublesome and reduces construction efficiency, and an improvement has been desired.

[Object of the invention] Therefore, the object of the invention is to eliminate the above-mentioned disadvantages, and to construct a solid retaining wall by combining shaped steel and wall pieces.
Moreover, the objective is to realize a retaining wall and its construction method that improves construction efficiency.

[Structure of the Invention J In order to achieve this object, the present invention provides a unit section steel that is erected with its longitudinal direction facing upward and has an anchoring part for anchoring a tension cable to the back surface of the unit section steel. It is characterized by having a wall piece arranged in a planar shape extending upward with both side ends abutting the locking surface.

In addition, unit sections of a predetermined length are lined up at predetermined intervals,
A tension cable anchoring part is provided on the back surface of this unit section steel to which one end of the tension cable is attached, and both ends are brought into contact with the locking surfaces of these two unit sections to form a flat wall piece. stacked on top of each other to form a wall surface,
Next, the retaining wall is constructed by erecting other unit sections on the upper end of the unit sections and sequentially forming the wall surface.

[Embodiments of the Invention] Examples of the present invention will be described in detail and specifically below based on the drawings.

1 to 5 show a first embodiment of the invention.

In the figure, 2 is a retaining wall, and this retaining wall 2 has a predetermined length (50 cm in this embodiment) of a plurality of H-shaped units m4,
It is constructed by combining a plurality of flat blocks 6, which are wall pieces, to maintain the stability of the embankment 8.

The retaining wall 2 is constructed as follows. As shown in FIG. 2, a slightly larger hole 12 is excavated in the ground 10 in which the H-beam 4 will be placed. The reason for excavating this hole 12 large is that a support plate 14 is attached to increase the support area of the lower end of the H-shaped steel 4, which will serve as the foundation at the bottom, to ensure stability after burial, and This is for alignment, vertical, and horizontal adjustment. If a thin layer of split stone 16 is spread at the bottom of the hole 12 and lightly tamped, stability will be improved when the H-shaped #i44 is piled up. Then, these H-beams 4 are vertically arranged in rows at predetermined intervals with the longitudinal direction facing upward. At this time, the two four parts of the H-shaped steel 4 are used as the first and second locking surfaces 4a and 4b, and these first and second locking surfaces 4a and 4b are used to expand the retaining wall 2. It is arranged in the longitudinal direction of the retaining wall 2. Next, the soil is backfilled while making the above-mentioned adjustments, and the soil is thoroughly compacted and backfilled. In addition,
The soil used for this backfilling should be soil that has a compacting effect, and in the case of sandy soil, it is best to pour cement or clay soil into it.

Next, one end 6a of the block 6 and the other end 6b of the other block 6 are connected to the first locking surface 4a of the H-shaped steel 4 and the second locking surface 4b of the other 4-shaped steel m4. erected with the two in contact with each other. The height of this block 6 is preferably 25 marks. Like this H
shape! A foundation is constructed using a combination of M4 and blocks 6 in the direction in which the retaining wall 2 is to be expanded.

After constructing the foundation of the retaining wall 2 in this way, another H-shaped steel 4 is placed on the upper end of the H-shaped steel 4 in the same manner. At this time, the joint surface 18 of the upper and lower H-beams 4.4 and the upper and lower blocks 6
．． 6 and the joint surface 2o are stacked so that they are not on the same level. This is because if the respective joint surfaces 18 and 20 are at the same level, there is a risk that the H-section steel 4 and the block 6 will be pressed by the tonosho and separate. It is for building. Then, blocks 6 are stacked one upon another to form a wall surface.

Next, a tension cable 22 is attached to the back side of the H-shaped steel 4 located on the back side of the retaining wall 2 as follows. The tension rope 22 is attached to the anchoring portion 24
This locking portion 24 consists of a fixing tool 26 and a mounting tool 28. The fixing tool 26 has a cross-sectional shape, and the - side is in contact with one surface of the section steel 4, and is held by two stud bolts 30 and a nut 32, which constitute the fixing tool 28, through a washer 34. On the other hand, the fixing tool 26
A hole 36 is formed approximately at the center of the other surface, and this hole 3
Attach one end of the tension cable 22 to 6. A turnbuckle 38 is interposed in the middle of this tension cable 22 and on the H-shaped steel 4 side,
This turnbuckle 38 (1) is used to adjust unevenness when the section steel 4 is piled up.The other end of the tension cable 22 is provided with a tensile resistance force acting on the back surface of the retaining wall 2. An anchor plate 40, which is a support member to be generated, is attached by a turnbuckle 42 so as to be vertically oriented.

The turnbuckle 38 interposed in the middle of the tension cable 22 is temporarily fastened, the tension cable 22 is stretched, one end of the anchor plate 40 is pushed into the ground of the base layer, and the embankment is carried out and compacted to form an anchor plate 40. to be fixed. Next, on the side of the H-section steel 4 that has not yet been backfilled, the unevenness of the H-section steel 4 is adjusted using the turnbuckle 38. Finally, the turnbuckle 38 portion is backfilled and compacted to complete the embankment work for the base layer.

Thereafter, the retaining wall 2 is constructed by performing embankment work for the 2nd N, 3rd layer, etc. between the base layer parts to form the wall surface.

In this way, since the H-section steel 4 for constructing the retaining wall 2 is formed to have a predetermined length, its transportation and handling become easy. Also,
At the time of assembly, the block 6 is simply constructed between one H-section steel 4 and the other adjacent H-section steel 4, so the assembly work can be easily performed. Moreover, during this assembly, the joint surface 18 of the H-beam 4 and the joint surface 20 of the block 6 are not matched, so there is no risk of the H-beam 4 or the block 6 coming off, and the retaining wall 2 can be constructed firmly. be able to.

In addition, by attaching the anchor plate 40 to the tension rope 22, a predetermined tensile resistance force can be easily generated, and the tension rope 22 can be easily generated.
It is also possible to shorten the length of 2, making construction easier.

FIG. 6 shows a second embodiment of the invention. In the following embodiments, parts having the same functions as those in the first embodiment described above will be described with the same reference numerals.

This second embodiment is characterized by the following points. That is, in the first embodiment described above, the H-shaped steel 4 was used as the shaped steel for supporting the block 6, but instead of the H-shaped steel 4, a T-shaped steel 44 is used. Further, an eye bolt 46 with one end of the tension cable 22 fixed to the hole in the head is directly screwed onto this T-beam 44.

When configured as in the second embodiment, the T-beam 44 is less expensive than the H-beam because it saves material. Also, T
By anchoring the tension cable 22 to the shaped steel 44 via the eye bolt 46, the installation work is easy, and the number of parts can be reduced, improving construction efficiency.

FIG. 7 shows a third embodiment of the invention. This third embodiment is characterized by the following points. That is, a bolt receiving member 48 serving as a supporting member is buried in a hole excavated in a hard slope such as a rock wall, the surrounding area is fixed with concrete, and the end of the tension cable 22 is inserted into the tapped hole formed in the bolt receiving member 48. The attached bolt 50 is screwed into the cable, and the other tension cable 22 is provided with an anchor plate 40 as in the first embodiment.

If configured as in the third embodiment, the supporting member is buried in the slope and fixed, so that the retaining wall 2 is firmly supported regardless of the properties of the embankment material, and is also supported by the anchor plate 40. Therefore, the embankment 8 is supported more stably.

Furthermore, by fixing the support member to the slope in this way, the retaining wall 2 can be reliably supported even if the distance between the retaining wall 2 and the slope of the rock wall is short.

FIG. 8 shows a fourth embodiment of the invention. This fourth embodiment is characterized by the following points. That is, a plurality of anchor plates 44 are attached to the tension cable 22 so as to be oriented vertically in the same manner as described above.

If configured as in the fourth embodiment, the pressure receiving area will be larger than that of a single anchor plate 40, the desired tensile resistance force can be easily generated, and the stability of the embankment 8 can be improved. becomes possible. It is also possible to make the anchor plate 40 large and increase the tensile resistance per unit area acting on the anchor plate 40.

FIG. 9 shows a fifth embodiment of the invention. This fifth embodiment is characterized by the following points. That is, in the first embodiment, the anchor plate 40 is only perpendicular to the tension cable 22, but the upper and lower surfaces of the anchor plate 40 are placed on the side receiving tension, that is, the H-shaped steel 4 The sides are bent into an equi-mountain shape.

If configured as in this fifth embodiment, anchor plate 1-4
Since the 0 is pulled as if cutting the embankment, it becomes possible to more reliably generate a tensile resistance force.

FIG. 10 shows a sixth embodiment of the invention. The features of this sixth embodiment are as follows.

That is, a plurality of tension ropes 22 are collected and attached to the auxiliary plate 52, and furthermore, the auxiliary tension ropes 54 are attached to the auxiliary plate 52.
One end is attached, and the other end is attached with an anchor brake 1.
-40 is attached.

If configured as in the sixth embodiment, it is possible to increase the tensile resistance by both the auxiliary plate 52 and the anchor plate 40.

It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made.

For example, as shown in the plan view of Fig. 3.4, the retaining wall 2 was formed by expanding linearly in the horizontal direction, but it is also possible to gradually change the installation direction of the H-shaped m4 to construct a curved retaining wall. is also possible.

Furthermore, in the first embodiment, the tension cable 22 is attached to the H-shaped steel 4 using the fixing device 26 and the attachment device 28, but as in the second embodiment, it is attached using attachment devices such as eye bolts 46. It is also possible.

[Effects of the Invention As is clear from the detailed explanation above, according to this invention,
By stacking multiple unit sections of a predetermined length and constructing wall pieces between each section steel, the section steel functions as a support for the retaining wall, and therefore the wall sections are solid. This increases the strength of the retaining wall, allowing it to be built more firmly and improving the durability of the retaining wall. In addition, since the wall pieces are held between the steel sections, assembly work becomes easier and construction efficiency is improved.

Furthermore, by anchoring the tension cable with the supporting member to the shaped steel, the retaining wall is reliably supported by maintaining a balance between the soil strength acting on the back of the retaining wall and the tensile resistance force generated by the supporting member. The stability of the embankment is improved.

Furthermore, since the retaining wall can be supported regardless of the properties of the embankment material, simple and economical construction is possible.

[Brief explanation of drawings]

1 to 10 show embodiments of this invention. 1 to 5 show a first embodiment of the present invention, FIG. 1 is a partial perspective view of a retaining wall, FIG. 2 is a schematic vertical sectional view of the retaining wall, and FIG. 3 is a cross-sectional view of the retaining wall. , FIG. 4 is an enlarged cross-sectional view indicated by the arrow ■ in FIG. 3, and FIG. 5 is a perspective view showing a state in which the It section steel and the tension cable are engaged. FIG. 6 shows a second embodiment of the present invention, and is an enlarged horizontal 1tli view showing the state of engagement between the 1'' section steel and the tension cable. FIG. 7 shows a third embodiment of the present invention, and is a schematic vertical sectional view of a retaining wall. 8th Ii! ! I shows a fourth embodiment of the present invention, and is a side view of a support member. FIG. 9 shows a fifth embodiment of the present invention, and is a side view of the support member. FIG. 10 shows a sixth embodiment of the present invention, and is a side view of the support member. In the figure, 2 is a retaining wall, 4 is an H-shaped steel, 6 is a block that is a wall piece, 8 is an embankment, 18 is a joint surface of a G-shaped steel, 20 is a joint surface of a block, 22 is a tension cable, and 24 is a suspension 38 is a turn hassock; 40 is an anchor plate 1- which is a supporting member. Agent: Patent attorney Yoshimi Saigo Patent attorney Yukio Harada's drawing I1 (no change in content) Figure 1. Fig. 3 Fig. 4 Fig. 6 Fig. 7 Fig. 9 Fig. 10 Fig. 2 Procedural official document (spontaneous) January 27, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case 1988 Patent Application No. 244717 2, Name of the invention Retaining wall and its construction method 3, Relationship with the case of the person making the amendment Patent applicant address 2-4-25 Hamamatsucho, Minato-ku, Tokyo Name Representative Okasan Kogyo Co., Ltd. Person: Yuji Okamura 4, Agent: 105'h 03-438-22
41 (Representative) Address: 3-4-1 Toranomon, Minato-ku, Tokyo
No. 7 No. 5, Date of amendment order Subject of spontaneous 6 amendment Drawing 7, Contents of amendment As shown in the attached sheet

Claims (1)

[Scope of Claims] (1) A unit section steel that is erected with its longitudinal direction facing upward and has an anchoring portion for anchoring a tension cable to the back surface, with both ends attached to the engagement surface of the unit section steel. 1. A retaining wall and a construction method thereof, characterized by having wall pieces arranged in a planar shape that abut and extend upward, and a construction method thereof. 2. Unit sections of a predetermined length are lined up and erected at predetermined intervals, a tension cable anchoring part is provided on the back of the unit sections, one end of the tension cable is anchored, and these two unit sections are A wall surface is constructed by stacking the wall pieces in a planar manner with both ends abutting on the locking surfaces of the wall sections, and then another unit section steel is erected on the upper end of the unit section steel to sequentially construct the wall surface. The retaining wall was built by doing this.
Retaining walls and their construction methods.