JP2015031105A - Retaining wall structure and construction method of retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve overall reduction in cost including both cases in manufacture and in construction, and to enhance construction quality of the whole retaining wall.SOLUTION: A retaining wall structure is constructed so as to cover a predetermined construction surface C by wall surface panels of one or two or more standing up at a predetermined angle to the ground G. The retaining wall structure comprises at least: wall surface panels 2 ... with a portion of rebars 3 ... embedded inside exposed to back sides 2r ... as exposed rebar parts 3e ...; a plurality of main support rebars 4... formed substantially in the L-shape by main vertical rebar parts 4v ... standing up at a predetermined angle Rm and main horizontal rebar parts 4h ... positioned horizontally, and fixing the main vertical rebar parts 4h ... in the exposed rebar parts 3e ...; a plurality of auxiliary support rebars 6 ... for supporting the exposed rebar parts 3e ... and/or the main vertical rebar parts 4v ...; and a filler concrete part 7 filled between the construction surface C and the wall surface panels 2 ....

Description

  TECHNICAL FIELD The present invention relates to a retaining wall structure and a retaining wall construction method suitable for use in constructing various retaining walls in roads, revetments, residential land development, and the like.

  Conventionally, concrete blocks that are integrally molded are sequentially built on various retaining walls in roads, etc., and back-filled concrete is placed between the back side of the concrete block and the work surface (cut surface, embankment surface, etc.). Retaining wall structure (retaining wall construction method) is widely used, but such conventional retaining wall structure (retaining wall construction method) requires a specialist to lay concrete blocks accurately. In addition to being unable to perform construction easily, the construction efficiency is inferior, the concrete blocks are heavy and large, so the transportability, economy and safety are inferior, and the construction site is also limited, the concrete blocks Since the integrity of the back-filled concrete is insufficient, it is difficult to ensure sufficient strength and reliability, and waste is generated at the site, such as requiring a back-stripping work. Therefore, it is inferior in resource conservation, there is a problem, such as.

  Therefore, the present applicant has already proposed a retaining wall structure and a retaining wall construction method for solving this problem according to Patent Document 1. This retaining wall structure (retaining wall construction method) improves construction efficiency by making construction easier (lighter work), and further improves transportability, economy, safety and resource savings, and has sufficient strength. The purpose is to ensure reliability. Specifically, it is arranged at a substantially right angle with respect to the work surface, and is installed at predetermined intervals in the horizontal direction, and is sequentially installed in the vertical direction. A plurality of support frames having a thickness of 2 mm, and a plurality of rear frames that are arranged between the support panels and have vertical slits provided at the rear side portions of the support panels that are located on both sides of the support panels. A panel, a plurality of front frame panels that overlap the front end surface of the support panel and cover the front surface of the retaining wall, a first connection mechanism that connects adjacent support panel panels, and a second that connects the rear frame panel and the front frame panel And a coupling mechanism.

Japanese Patent Application No. 11-251395

  However, the retaining wall structure and the retaining wall construction method according to Patent Document 1 described above still have the following problems to be solved.

  First, since a block material is used as an intermediate strut in part, different intermediate struts for different standards set by the inclination angle of the retaining wall to be constructed are required. Accordingly, it is necessary to prepare a plurality of different types of intermediate struts, which makes it difficult to store and manage the intermediate struts and their formwork. In addition, if the design conditions at the time of planning are changed due to changes in the cross-section, etc. during construction, it will be a cause of defective inventory and a new intermediate strut manufacturing period will be required, resulting in construction delays. End up.

  Secondly, since there is a limit to increasing the size of each intermediate strut by the block material, a large number of intermediate struts are required. Accordingly, the cost of the entire retaining wall is increased, including the cost increase in manufacturing due to the production of different types of intermediate struts, and the cost increase during construction associated with the installation of a large number of intermediate struts. And since the continuity (integration) of the surface direction in the whole retaining wall cannot be ensured, it is not easy to improve the whole construction quality.

  The object of the present invention is to provide a retaining wall structure and a retaining wall construction method that solve the problems in the background art.

  In order to solve the above-described problem, the retaining wall structure A according to the present invention is a retaining wall constructed so as to cover a predetermined construction surface C by one or two or more wall panels standing at a predetermined angle with respect to the ground G. In the structure, a part of the reinforcing bars 3 embedded therein are exposed as the exposed stripes 3e, the wall surface panel 2 exposed on the back surface 2r, the main vertical stripes 4v standing up at a predetermined angle Rm, and the main located horizontally. A plurality of main support muscles 4 which are formed in a substantially L shape by the horizontal stripes 4h, and the main vertical stripes 4h are fixed to the exposed stripes 3e, and the exposed stripes 3e, and / or the main vertical stripes 4v. Are provided with at least a plurality of auxiliary support bars 6 supporting the inner surface of the construction surface C and the wall surface panels 2.

  In this case, according to a preferred aspect of the invention, a plurality of auxiliary support bars 5 fixed on the construction surface C side are provided, and between the auxiliary support bars 5 and the exposed reinforcing bars 3e and / or the main vertical bars 4v. A plurality of auxiliary support muscles 6 can be erected. The auxiliary support bar 5 can be formed in a substantially L shape by the auxiliary vertical bar part 5v standing up at a predetermined angle Rs and the auxiliary horizontal bar part 5h positioned horizontally. Further, a plurality of sandbags 8 are stacked along the construction surface C, and a plurality of auxiliary auxiliary muscles 9 that support the auxiliary support muscles 4 are interposed between the upper and lower sandbags 8 and fixed. . Further, a predetermined gap S can be provided between the work surface C and the sandbags 8 and the gravel J can be filled in part or all of the gap S. The plurality of auxiliary auxiliary muscles 9 that support the auxiliary supporting muscles 5 can be directly fixed to the construction surface C as the differential reinforcement 9e.

  On the other hand, in order to solve the above-described problem, the construction method of the retaining wall W according to the present invention covers a predetermined construction surface C by raising one or more wall panels to the ground G at a predetermined angle. When constructing the retaining wall W, a plurality of main support bars 4 formed in a substantially L shape by the main vertical bars 4v standing up at a predetermined angle Rm and the main horizontal bars 4h positioned horizontally are installed on the ground G side. In addition, the wall panel 2 exposed on the back surface 2r as a part of the reinforcing bar 3 embedded in the inside is exposed to the main vertical stripe 4v, and is fixed to the exposed stripe 3e. Alternatively, the intermediate vertical concrete portion 7 is provided by filling the concrete M between the work surface C and the wall panel 2.

  In this case, according to a preferred aspect of the invention, a plurality of secondary support bars 5 are fixed on the construction surface C side, and between the secondary support bars 5 and the exposed bars 3e and / or the main vertical bars 4v. A plurality of auxiliary support muscles 6 can be installed. Moreover, while installing the base part N and mounting the installation stand 10 ... on this foundation part N, the wall surface panel 2 ... can be mounted on this installation base 10 .... Further, the main support bars 4 can be used as a part of the fall prevention fence 11 during construction.

  According to the construction method of the retaining wall structure A and retaining wall W according to the present invention as described above, the following remarkable effects can be obtained.

  (1) The retaining wall structure A has a wall panel 2 exposed on the back surface 2r as a part of the reinforcing bars 3 embedded in the interior as an exposed bar 3e, and a main vertical bar 4v standing up at a predetermined angle Rm. And a plurality of main support muscles 4 which are formed in a substantially L shape by the main transverse stripes 4h located horizontally, and the main longitudinal stripes 4h are fixed to the exposed stripes 3e, and the exposed stripes 3e. In order to include at least a plurality of auxiliary support bars 6 that support the main longitudinal bars 4v and the interstitial concrete part 7 filled between the work surface C and the wall panel 2, a concrete block material such as an intermediate column is provided. It becomes completely unnecessary, and storage and management of the intermediate strut and its formwork are also unnecessary. As a result, the overall cost, including both manufacturing and construction, can be reduced, and continuity (integration) in the surface direction of the entire retaining wall can be easily secured, and the construction quality of the entire retaining wall can be easily increased. Can do. In addition, even when the design at the time of planning is changed due to a change in cross-section during construction, it is possible to respond quickly and avoid problems such as construction delays.

  (2) The retaining wall W has a construction method in which a plurality of main support bars 4 formed in a substantially L shape by main vertical bars 4v standing up at a predetermined angle Rm and main horizontal bars 4h positioned horizontally are ground G. The wall surface panel 2 that is exposed on the back surface 2r as a part of the reinforcing bar 3 embedded in the interior is exposed to the main vertical bar 4v and is fixed to the exposed bar 3e. ... and / or the main longitudinal bars 4v ... are supported by the plurality of auxiliary support bars 6 ..., and then the concrete M is filled between the work surface C and the wall panel 2 ... so that the interstitial concrete part 7 is provided. The retaining wall structure A according to the present invention described above can be easily constructed and can be constructed safely and reliably.

  (3) A plurality of main vertical stripes 4v standing up at a predetermined angle Rm and main horizontal stripes 4h positioned horizontally are formed in a substantially L shape, and the main vertical stripes 4h are fixed to the exposed stripes 3e. Since the main support bars 4 are used, the angle of the wall panel 2 can be set easily and reliably, and the wall panel 2 can be reliably supported.

  (4) According to a preferred embodiment, a plurality of sub-supporting bars 5 fixed on the construction surface C side are provided, and a plurality of sub-supporting bars 5 and a plurality of strips between the exposed bar 3e and / or the main vertical bar 4v are provided. If the auxiliary support bars 6 are constructed, the wall panel 2 is reliably supported even when the height of the retaining wall W is high, that is, when the number of steps of the wall panel 2 is large. It can be supported accurately and stably.

  (5) According to a preferred embodiment, if the auxiliary support bar 5 is formed in a substantially L shape by the auxiliary vertical line part 5v standing up at a predetermined angle Rs and the auxiliary horizontal line part 5h positioned horizontally, the auxiliary support part 5 The angle of the line portion 5v) can be set easily and reliably, and the wall surface panels 2 can be more reliably and stably supported.

  (6) According to a preferred embodiment, a plurality of sandbags 8 are stacked along the construction surface C, and a plurality of auxiliary auxiliary muscles 9 that support the auxiliary support muscles 4 are interposed between the upper and lower sandbags 8. If the sandbags 8 are fixed, the sandbags 8 can also be used as temporary sandbags for construction, contributing to further safety and ease of work for workers, and the sandbags 8. Since the auxiliary auxiliary muscles 9 can be constructed together at the time of lamination, the auxiliary auxiliary muscles 9 can be easily and quickly installed and fixed.

  (7) If a predetermined gap S is provided between the work surface C and the sandbags 8 according to a preferred embodiment, and a part or all of the gap S is filled with gravel J, the sandbags 8. Since it can be fixed by the work surface C, it is possible to effectively position the sandbags 8 and prevent displacement, and in particular, the gravel J can function as a drainage layer (water flow layer) after the retaining wall W is completed.

  (8) If a plurality of auxiliary auxiliary muscles 9 supporting the auxiliary supporting muscles 5 are directly fixed as differential bars 9e to the construction surface C according to a preferred embodiment, the sandbag 8 and gravel J Even if not used, the auxiliary support bars 5 can be fixed, so that the construction surface C is particularly suitable when it is a bedrock.

  (9) According to a preferred embodiment, the foundation portion N is constructed, and the installation base 10 is placed on the foundation portion N, and the wall panel 2 is placed on the installation base 10. Then, since the wall surface panel 2 can be reliably supported at an accurate position, the quality and durability of the retaining wall W can be further enhanced.

  (10) If the main support bars 4 are used as a part of the fall-preventing fence 11 at the time of construction according to a preferred embodiment, it is possible to contribute to further improvement of worker safety and ease of work. .

Side cross-sectional structure diagram of a retaining wall structure according to a preferred embodiment of the present invention, The perspective view seen from the front side of the retaining wall using the retaining wall structure, The perspective view seen from the back side of the wall surface panel used for the retaining wall structure, Sectional drawing which shows a part of wall surface panel used for the retaining wall structure, The perspective view of the mounting base used for the retaining wall structure, A side view of the main support muscle used for the retaining wall structure and a perspective view of the extracted coupling fitting, Process explanatory drawing of the construction method of the retaining wall concerning the preferred embodiment of the present invention, Flow chart (process diagram) for explaining the construction method, Flowchart (process diagram) for explaining the construction process of the nth exterior wall surface in the construction method, Flow chart (process diagram) for explaining the construction process of the nth natural wall surface in the construction method, Schematic diagram of the retaining wall structure according to a modified embodiment of the present invention,

  Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.

  First, main members used in the retaining wall structure A according to the present embodiment will be described with reference to FIGS.

  In the retaining wall W using the illustrated retaining wall structure A, the required number of wall surface panels 2..., The required number of main support bars 4..., The required number of auxiliary support bars 5. , A required number of auxiliary support bars 6, a required number of sandbags 8, and a required number of foundation panels 21 are used.

  The wall surface panel 2 is integrally molded as precast concrete as shown in FIGS. 2 and 3, and the illustrated wall surface panel 2 has a thickness dimension of 50 mm, a horizontal dimension of 2000 mm, and a vertical dimension of 1000. [Mm], and the weight per square meter is 123 [kg]. This wall panel 2 basically needs only one kind. Further, semicircular cutouts 2h for exposing a drain pipe 38, which will be described later, are provided at the center position of the upper side and the lower side of the wall panel 2. The surface 2f of the wall panel 2 is preferably formed in a natural stone style by a natural stone-like pseudo stone method or the like. On the other hand, as shown in FIGS. 3 and 4, the wall panel 2 has a required number (for example, four) of reinforcing bars 3 embedded therein, and a part thereof is exposed on the back surface 2r as exposed bars 3e. Let A truss bar is used for the reinforcing bar 3, and its basic form is substantially the same as that of the installation base 10 except for the support plate 10p shown in FIG.

  Since such a wall panel 2 is a flat plate having a rectangular overall shape, the wall surface panel 2 is lighter than a general block material and can be easily processed on site. Therefore, it can be used especially for curved surfaces, corners, tops, adjustments, etc., and can be flexibly installed according to the work site and can realize a significant labor saving by machine construction. . In addition, even when stacked, it does not become bulky, so that a large place and large heavy machinery are not required, and the number of vehicles carried in can be greatly reduced.

  As shown in FIG. 6, the main support bar 4 is formed in a substantially L shape by a main vertical bar part 4v standing at a predetermined angle Rm and a main horizontal bar part 4h positioned horizontally. Therefore, the main support bars 4 can be integrally formed by bending a single steel material having a ring-shaped large-diameter portion (convex portion) formed in large numbers at regular intervals in the axial direction of the outer peripheral surface. The main support bars 4 are preferably selected to have a diameter of about 3 to 4 [mm] in consideration that at least the wall surface panels 2 can be supported. In addition, the length of the main horizontal stripe part 4h and the main vertical stripe part 4v can be selected according to the scale of the retaining wall W to construct. Further, the main vertical streak portion 4v can be extended upward from the upper end of the main vertical streak portion 4v by separately preparing an extension vertical streak portion formed linearly and additionally connecting to the main vertical streak portion 4v. You may comprise as follows. As described above, if the main support portions 4 are formed in a substantially L shape by the main vertical stripes 4v standing up at a predetermined angle Rm and the main horizontal stripes 4h positioned horizontally, the angle of the wall panel 2 is easily set. And it can set reliably and can support wall surface panel 2 ... reliably.

  As shown in FIG. 6, the auxiliary support bar 5 is also formed in a substantially L shape by the auxiliary vertical bar part 5 v standing at a predetermined angle Rs and the horizontal horizontal bar part 5 h positioned horizontally. For this reason, the secondary support bars 5 can also be integrally formed by bending a single steel material having a ring-shaped large-diameter portion (convex portion) formed in large numbers at regular intervals in the axial direction of the outer peripheral surface. The diameter of the auxiliary support bar 5 can be selected to be narrower than that of the main support bar 4, and the lengths of the auxiliary horizontal bar part 5h and the auxiliary vertical bar part 5v can be selected according to the scale of the retaining wall W to be constructed. Further, with respect to the sub-longitudinal streaks 5v, a separately extending longitudinal streak portion is prepared and additionally attached to the sub-vertical streak portion 5v, so that it can be extended upward from the upper end of the sub-vertical streak portion 5v. You may comprise as follows. In this way, if the auxiliary support muscle 5 is formed in a substantially L shape by the auxiliary vertical muscle portion 5v standing at a predetermined angle Rs and the auxiliary horizontal muscle portion 5h positioned horizontally, the auxiliary support portion 5 (sub-vertical longitudinal muscle portion 5v) is formed. Can be easily and reliably set, and the sub-longitudinal streaks 5v can be easily fixed to the construction surface C side in combination with the sub-auxiliary bars 9 to be described later. Supports reliably and stably.

  In addition, a plurality of auxiliary auxiliary muscles 9 are attached to the auxiliary support muscle 5 to support the auxiliary support muscle 5. The auxiliary auxiliary bars 9 can be integrally formed by bending a single steel material (rebar) having a ring-shaped large-diameter part (convex part) formed at regular intervals in the axial direction of the outer peripheral surface into a U-shape. (See FIGS. 6 and 7). In this case, the overall length in the longitudinal direction is considered so that it is fixed with sufficient strength when it is sandwiched between upper and lower sandbags 8 to be described later, and is not easily removed or displaced.

  The auxiliary support bar 6 basically supports the wall panel 2 from the back surface 2r side, and has one ring-shaped large-diameter portion (convex portion) formed at a constant interval in the axial direction of the outer peripheral surface. Reinforcing bars are used. The auxiliary support muscle 6 can be used after being cut into an arbitrary length according to the state of the site. On the other hand, the sandbag 8 may be a general sandbag in which sandbags are filled with earth and sand. Moreover, the foundation panel 21 is integrally molded as precast concrete. In this case, a rectangular shape having a predetermined thickness can be used. In the example, the foundation panel 21 is used, but instead of laying the foundation panel 21, the concrete M may be placed on site to provide the leveled concrete portion (21 e).

  Next, the construction method of the retaining wall W according to the present embodiment will be described according to the process diagram shown in FIG. 8 (FIGS. 9 and 10) with reference to FIGS. 1 to 7.

  First, in addition to the required number of main members described above, other various construction members are prepared (step S1). On the other hand, at the construction site, necessary excavation and floor digging are performed on the ground G serving as a construction site and the construction surface C serving as a cliff face (inclined surface), and a foundation is formed on the ground G as shown in FIG. Part N is constructed. When constructing the foundation N, first, the foundation crushed stone 31 is laid (step S2). Further, the foundation panel 21 is laid on the foundation crushed stone 31, or the concrete M is placed and a leveled concrete portion (21e) is provided (step S3).

  Next, a construction process is performed on the first natural wall of the nth stage (step S4). In this case, one level is the height of one wall panel 2, and the natural wall is synonymous with the work surface C. The detailed process of the construction process for the natural wall surface is shown in FIG. First, sandbags 8 are sequentially arranged in the horizontal direction (steps S21 and S22). FIG. 7A shows the sandbags 8 arranged in the horizontal direction. When the installation of the first stage is completed, the second stage, the third stage, the fourth stage, etc. are similarly constructed up to the target stage. Accordingly, the sandbags 8 can be sequentially stacked along the work surface C as shown in FIG. At this time, a predetermined gap S is provided between the work surface C and the sandbag 8. In this way, if the sandbags 8 are stacked along the construction surface C, the sandbags 8 can be used as temporary earth retainings at the time of construction, which can contribute to further improvement of safety and ease of work for workers. There are advantages.

  Moreover, at the time of construction of the sandbags 8 ..., adjustment of the "position / angle" of the stacked sandbags 8 ... (step S23), installation of "auxiliary reinforcement 9 ..." (step S25), 32 ”(step S27) and“ gravel J ”filling (step S29) are determined. And in each stage, when these constructions are required, adjustment of the corresponding “position / angle” (step S24), installation of “auxiliary reinforcement 9...” (Step S26), installation of “water-impervious sheet 32” (Step S28) and filling of “gravel J” (Step S30) are performed.

  In this case, the “position / angle” is adjusted so that the tilt angle and the installation position of the stacked sandbags 8... The installation of “auxiliary supplementary muscles 9...” Is to fix the accessory supplementary muscles 9 to be interposed between the upper and lower sandbags 8. In the case of FIG. 1 illustrated, the second stage and the third stage. The case where it installs between the upper and lower sandbags 8 between the seventh stage and the eighth stage is shown. If such construction is performed, since the auxiliary auxiliary muscles 9 can be constructed together when the sandbags 8 are stacked, there is an advantage that the auxiliary auxiliary muscles 9 can be easily and quickly installed and fixed. Note that the positions of the auxiliary auxiliary muscles 9 in the lateral direction are set at predetermined intervals as shown in FIG. In this case, it is possible to use two left and right positions as a guide for each wall panel 2. As shown in FIG. 1, the installation of the “water-impervious sheet 32” is one in which a waterproof sheet having a water-impervious function is interposed between the upper and lower sandbags 8. It is interposed between the upper and lower sandbags 8.

  Filling with “gravel J” fills a predetermined gap S provided between the work surface C and the sandbag 8. In particular, the inclination angle and the installation position of the stacked sandbags 8 are not shifted. Thus, it is desirable to fill at an appropriate interval. Thus, if the gap S between the construction surface C and the sandbags 8 is filled with gravel J, the sandbags 8 can be fixed by the construction surface C, and therefore effective positioning and displacement with respect to the sandbags 8. In addition to the prevention, gravel J can function as a drainage layer (water passage layer) after the retaining wall W is completed. Note that the gravel J may be filled in all or a part of the gap S. That is, the gravel J may be filled only in a part of the gap S by combining with soil return (backfill soil backfill) generated by excavation or floor excavation performed earlier. The above construction is performed until the height of the sandbags 8 reaches the target stage (step S31). Thereby, the construction process of the 1st step with respect to a natural wall surface is complete | finished.

  Next, a construction process is performed on the first outer appearance wall surface among the nth stages (step S5). The exterior wall surface means a wall surface by the wall panel 2. The detailed process of the construction process with respect to an external wall surface is shown in FIG. First, in order to install the first-stage wall panel 2, as shown in FIG. 1 and FIG. 7 (a), on the base portion N, that is, on the upper surface of the base panel 21 (averaged concrete (21e)). 5 is mounted (steps S41 and S42) using the truss bars shown in FIG. In the example, two installation stands 10... Are used for one wall panel 2. In this way, if the foundation portion N is constructed and the installation table 10 is placed on the foundation portion N, and the wall panel 2 is placed on the installation table 10, the wall surface is obtained. Since the panel 2 can be reliably supported at an accurate position, the quality and durability of the retaining wall W can be further improved.

  Then, the first-stage wall surface panel 2 is placed on the installation table 10 (step S43). In this case, the crane is suspended by using the exposed streaks 3e of the wall surface panel 2 by a crane truck or the like, and fixed at a fixed position on the installation base 10 ..., that is, the upper end of the installation base (truss) 10 ... It is placed on the support plate 10p, and is inclined at an angle close to an inclination angle (predetermined angle Rm) of a main vertical stripe 4v described later. Next, as shown in FIG. 7B, a plurality of adjusters 35 are provided, and the adjusters 35 are adjusted (operated) so that the inclination angle of the wall surface panel 2 with respect to the ground G becomes a predetermined angle Rm ( Steps S44 and S45).

  Further, as shown in FIG. 1, various supporting reinforcing bars are attached (step S46). The supporting reinforcing bars include at least main supporting bars 4, auxiliary supporting bars 5, and auxiliary supporting bars 6. First, the two main support bars 4 are erected at the left and right positions on the back surface 2r side of the wall surface panel 2, and the main horizontal bars 4h are placed on the foundation panel 21 (equal concrete (21e)). The vertical streaks 4v are brought into contact with the exposed streaks 3e on the back surface 2r of the wall panel 2, so that the main vertical streaks 4v and the exposed streaks 3e are utilized by using the fixing brackets 37 shown in FIG. ... is fixed (coupled). Note that the fixing bracket 37 shown in FIG. 6 is an example, and the form is not limited as long as the main supporting bar 4 and the exposed bar 3e can be fixed (coupled).

  Further, as shown in FIG. 1, on the foundation panel 21 (equalized concrete (21e)), the auxiliary horizontal bars 5h in the auxiliary support bars 5 ... are placed, and the auxiliary vertical bars 5v ... By making contact with the tips of the auxiliary auxiliary muscles 9 arranged in the vertical direction on the surface C side, the auxiliary longitudinal muscle portions 5v and the auxiliary auxiliary muscles 9 are used by using the binding tools 33 such as wires shown in FIG. Fix…. Note that the binding tool 33 shown in FIG. 6 is an example, and any form is possible as long as the auxiliary auxiliary muscle 9 and the auxiliary vertical muscle portion 5v can be coupled (bundled).

  As shown in FIG. 1, the wall panel 2 is supported by attaching a plurality of auxiliary support bars 6 to the main vertical bars 4v and / or the exposed bars 3e. In the case of illustration, the upper end (one end) of the auxiliary support bars 6 is attached to the main longitudinal bar 4v and / or the exposed bar 3e, and the lower end (the other end) is placed on the foundation panel 21 or the installation table 10. Although the case where it attached to ... was shown, you may couple | bond with the auxiliary support muscle 5 .... In this case, since the first stage is in a relatively low position, the auxiliary support bars 6 can be installed without using the auxiliary support bars 5 but the wall panel 2 can be supported. Basically, the wall surface panel 2 is supported using the auxiliary support muscles 5. That is, as shown in FIG. 1, the plurality of auxiliary support bars 6 are arranged between the plurality of auxiliary support bars 5 fixed to the construction surface C side and the exposed bars 3e and / or the main vertical bars 4v. Erection. If constructed in this manner, the wall surface panels 2 can be reliably supported even when the height of the retaining wall W is high, that is, when the number of steps of the wall surface panels 2 is large, and accurately and stably. There is a supportable advantage.

  When the assembly of the supporting reinforcing bars (main supporting bars 4..., Auxiliary supporting bars 5... And auxiliary supporting bars 6...) Is completed, welding is performed between the supporting reinforcing bars (step S 47). Further, the suspension of the wall surface panel 2 by the crane truck or the like is released (step S47). Thereafter, the remaining wall panels 2 in the first horizontal direction are similarly installed according to the above-described construction procedure (steps S48, S41,...).

  When the installation of all the wall surface panels 2 in the first stage is completed, the remaining construction on the natural wall surface (surface C) is performed (step S49). Specifically, as shown in FIG. 1, a remaining process such as attachment of drain pipes 38 is performed. The drain pipes 38... Accommodate the front ends in the notches 2 h on the upper side of the wall panels 2... And insert the rear ends between the sandbags 8. Moreover, as shown in FIG.7 (c), in order to ensure the surface continuity between each wall surface panel 2 ..., the corrector 39 ... which straddles between each adjacent wall surface panel 2 and 2 ... is attached. (Step S50). The corrector 39 includes a pair of wooden panel members 39f and 39r respectively addressed to the front surface 2f and the rear surface 2r of the wall surface panel 2, and fastening using bolts and nuts that are installed and tightened between the wooden panel members 39f and 39r. Attached device 39c and separator material 39s having the same thickness as wall surface panel 2 are provided. When the attachment of the correctors 39 is completed, the adjusters 35 are removed (step S51). Thereby, the construction process of the 1st step in an external appearance wall surface is complete | finished.

  Next, as shown in FIG. 1, concrete M is placed below the wall panels 2 to construct the foundation concrete portion 41, and the lower ends of the wall panels 2 are securely fixed (step S6). When the foundation concrete part 41 is sufficiently solidified, the interstitial concrete part 7 is further provided by filling the space between the wall surface panels 2 and the sandbags 8 with the concrete M (step S7). In this case, if there is a second or higher stage construction, the height (amount) of the concrete M to be filled should be about 80% of the total height of the wall panel 2... It is desirable to secure the sex. And after completion | finish of filling of the concrete M, it is made to age for a fixed period (step S8, S9).

  If there is a second or higher stage construction, the construction similar to the first stage described above may be repeated (steps S10, S4...). In this case, the main longitudinal bars 4v of the main support bars 4 project upward from the upper ends of the first-stage wall panels 2, so that a bar 51 such as a reinforcing bar or pipe is provided as shown in FIG. The main support muscles 4 are fixed to a predetermined height using the fixing tool 52. Thereby, the fall prevention fence 11 in which the bar 51 functions as a handrail can be provided. If the main support bars 4 are used as a part of the fall prevention fence 11, there is an advantage that the main support bars 4 can contribute to further improvement of worker safety and workability. And when the construction of the wall panels 2... Reaches the final stage, a necessary top end construction process is performed by filling the concrete M to the highest height.

  As described above, according to the method for constructing the retaining wall W according to the present embodiment, a plurality of substantially vertical L-shaped portions are formed by the main longitudinal bars 4v standing up at a predetermined angle Rm and the main horizontal bars 4h positioned horizontally. The main support bars 4 are installed on the ground G side, and the wall panel 2 exposed on the back surface 2r as a part of the reinforcing bars 3 embedded therein is exposed to the main vertical bars 4v. The exposed streaks 3e and / or the main vertical streaks 4v are supported by a plurality of auxiliary support bars 6 and then filled with concrete M between the work surface C and the wall panel 2. Since the concrete part 7 is provided, the retaining wall structure A according to the present invention described above can be easily constructed and can be constructed safely and reliably.

  On the other hand, FIGS. 11A to 11C show a retaining wall structure A according to a modified embodiment of the present invention. FIG. 11A differs from the basic embodiment shown in FIG. 1 in that the work surface C is a rock mass Cr. In this case, a plurality of auxiliary auxiliary muscles 9 can be directly fixed to the bedrock Cr as differential bars 9e. Accordingly, even if the sandbags 8 and gravel J are not used, the auxiliary support bars 5 can be fixed, and therefore, it is particularly suitable when the construction surface C is the rock mass Cr. Further, FIG. 11B is different from the basic embodiment shown in FIG. 1 in that the inclination angle of the wall surface panels 2 is raised substantially perpendicular to the ground G (horizontal plane). Even in this case, it can be constructed in the same manner as the basic embodiment shown in FIG. 1 by attaching the necessary number of adjusters 35. Further, FIG. 11 (c) is inclined with respect to the basic embodiment shown in FIG. 1 in a state where the inclination angle of the work surface C is substantially perpendicular to the ground G (horizontal plane). The point is different. Even in this case, since the basic structure is the same as that of the basic embodiment shown in FIG. 1, it can be constructed in the same manner as the basic embodiment.

  Therefore, according to the retaining wall structure A according to the present embodiment including such a modified embodiment, the retaining wall structure A includes a part of the reinforcing bars 3 embedded in the back surface 2r as the exposed reinforcing bars 3e. The exposed wall panel 2 and the main vertical stripes 4v standing up at a predetermined angle Rm and the main horizontal stripes 4h positioned horizontally are formed in a substantially L shape, and the main vertical stripes 4h are exposed stripes 3e. A plurality of main support muscles 4 fixed to the plurality of auxiliary support muscles 6 supporting the exposed muscle portions 3e and / or the main longitudinal muscle portions 4v, and the construction surface C and the wall panel 2 are filled in between. Therefore, the concrete block material such as the intermediate strut is not required at all, and the storage and management of the intermediate strut and its formwork are not required. Thereby, while being able to aim at the whole cost reduction including both at the time of manufacture and construction, the continuity (integration) in the surface direction of the whole retaining wall can be easily secured, and the overall construction quality can be easily enhanced. . In addition, even when the design at the time of planning is changed due to a change in cross-section during construction, it is possible to respond quickly and avoid problems such as construction delays. In addition, since it can be implemented in various forms, and it is easy to change the form, it can be implemented in an optimum form according to the situation at the site, etc., and can contribute to a reduction in usage of concrete M.

  The preferred embodiment (modified embodiment) has been described in detail above. However, the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, numerical value, technique, procedure, etc. However, any change, addition, or deletion can be made without departing from the scope of the present invention. For example, the case where the auxiliary support portion 5 is formed in a substantially L shape by the auxiliary vertical stripe portion 5v standing up at a predetermined angle Rs and the horizontal auxiliary stripe portion 5h is shown, but the auxiliary vertical stripe without the auxiliary horizontal stripe portion 5h is shown. The case where only the portion 5v is formed is not excluded. Moreover, as shown in the modified embodiment, the sandbags 8 are not necessarily used. On the other hand, although the example which mounts the installation base 10 ... on the foundation part N, and mounts the wall surface panel 2 ... on this installation base 10 ... was given, the foundation panel 21 (leveling concrete 21e) was taken in advance. The inside may be embedded in the same manner as the wall surface panel 2.

  The construction method of the retaining wall structure A and retaining wall W according to the present invention can be used when constructing various retaining walls W in roads, revetments, residential land development, and the like.

  2 ...: Wall panel, 2r ...: Back surface of wall panel, 3 ...: Reinforcing bar, 3e ...: Exposed muscle, 4 ...: Main support muscle, 4v ...: Main longitudinal muscle, 4h ...: Main transverse muscle, 5 ... : Secondary support muscle, 5v ...: secondary longitudinal muscle portion, 5h ...: secondary transverse muscle portion, 6 ...: auxiliary support muscle, 7: intermediate concrete portion, 8 ...: sandbag, 9 ...: accessory auxiliary muscle, 9e ...: differential muscle 10: Installation stand, 11: Fall prevention fence, A: Retaining wall structure, W: Retaining wall, G: Ground, C: Construction surface, Rm: Predetermined angle, Rs: Predetermined angle, S: Clearance, J: Gravel, M: Concrete, N: Foundation

  (1) The retaining wall structure A has a wall panel 2 exposed on the back surface 2r as a part of the reinforcing bars 3 embedded in the interior as an exposed bar 3e, and a main vertical bar 4v standing up at a predetermined angle Rm. And a plurality of main supporting muscles 4 formed by fixing the main longitudinal bars 4v to the exposed stripes 3e, and the exposed stripes 3e, and / or. In order to include at least a plurality of auxiliary support bars 6 that support the main longitudinal bars 4v and the interstitial concrete part 7 filled between the work surface C and the wall panel 2, a concrete block material such as an intermediate column is provided. It becomes completely unnecessary, and storage and management of the intermediate strut and its formwork are also unnecessary. As a result, the overall cost, including both manufacturing and construction, can be reduced, and continuity (integration) in the surface direction of the entire retaining wall can be easily secured, and the construction quality of the entire retaining wall can be easily increased. Can do. In addition, even when the design at the time of planning is changed due to a change in cross-section during construction, it is possible to respond quickly and avoid problems such as construction delays.

  As shown in FIG. 6, the main support bar 4 is formed in a substantially L shape by a main vertical bar part 4v standing at a predetermined angle Rm and a main horizontal bar part 4h positioned horizontally. Therefore, the main support bars 4 can be integrally formed by bending a single steel material having a ring-shaped large-diameter portion (convex portion) formed in large numbers at regular intervals in the axial direction of the outer peripheral surface. The main support bars 4 are preferably selected to have a diameter of about 30 to 40 [mm], considering that at least the wall surface panels 2 can be supported. In addition, the length of the main horizontal stripe part 4h and the main vertical stripe part 4v can be selected according to the scale of the retaining wall W to construct. Further, the main vertical streak portion 4v can be extended upward from the upper end of the main vertical streak portion 4v by separately preparing an extension vertical streak portion formed linearly and additionally connecting to the main vertical streak portion 4v. You may comprise as follows. As described above, if the main support portions 4 are formed in a substantially L shape by the main vertical stripes 4v standing up at a predetermined angle Rm and the main horizontal stripes 4h positioned horizontally, the angle of the wall panel 2 is easily set. And it can set reliably and can support wall surface panel 2 ... reliably.

Claims (10)

  In the retaining wall structure constructed so as to cover a predetermined construction surface with one or more wall panels standing at a predetermined angle with respect to the ground, a part of the reinforcing bar embedded inside is exposed on the back as an exposed reinforcement part A plurality of main support bars formed in a substantially L shape by a wall panel, a main vertical stripe portion standing up at a predetermined angle, and a main horizontal stripe portion positioned horizontally, and fixing the main vertical stripe portion to the exposed stripe portion; A plurality of auxiliary support bars that support the exposed bars and / or the main vertical bars, and at least an interstitial concrete part filled between the work surface and the wall panel. Wall structure.   A plurality of auxiliary support bars fixed on the construction surface side, and a plurality of auxiliary support bars are laid between the auxiliary support bars and the exposed and / or main vertical bars. The retaining wall structure according to claim 1.   3. The retaining wall structure according to claim 2, wherein the auxiliary support bar is formed in a substantially L shape by a sub vertical bar part standing up at a predetermined angle and a horizontal side horizontal bar part positioned horizontally.   A plurality of sandbags are stacked along the construction surface, and a plurality of auxiliary auxiliary muscles that support the auxiliary support muscles are interposed between upper and lower sandbags of the sandbag and fixed. Retaining wall structure as described.   The retaining wall structure according to claim 2, 3 or 4, wherein a predetermined gap is provided between the work surface and the sandbag, and a part or all of the gap is filled with gravel.   The retaining wall structure according to claim 2 or 3, wherein a plurality of auxiliary auxiliary muscles that support the auxiliary supporting muscles are directly fixed as differential bars to the construction surface.   In a construction method of a retaining wall that covers a predetermined construction surface by standing one or more wall panels upright at a predetermined angle with respect to the ground, a main vertical bar portion standing horizontally at a predetermined angle and a main horizontal bar portion positioned horizontally A plurality of main support bars formed in a substantially L shape by the above are installed on the ground side, and a wall panel in which a part of the reinforcing bars embedded in the interior is exposed on the back surface is exposed and fixed to the main vertical bars. And after supporting the said exposed reinforcement part and / or the said main vertical reinforcement part by several auxiliary | assistant support reinforcement, it is characterized by providing an interstitial concrete part by filling concrete between the said to-be-constructed surface and the said wall surface panel, Retaining wall construction method.   A plurality of auxiliary support bars are fixed to the construction surface side, and a plurality of auxiliary support bars are installed between the auxiliary support bars and the exposed and / or main vertical bars. Retaining wall construction method described.   The method for constructing a retaining wall according to claim 7 or 8, wherein a foundation is constructed, an installation table is placed on the foundation, and the wall panel is placed on the installation table. .   The retaining wall construction method according to claim 7, wherein the main support bar is used as a part of a fall prevention fence during construction.

Images