JP2018009430A - Device and method for constructing retaining wall in disaster-relief work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retaining wall construction in disaster-relief work, which can minimize work of drilling and transporting natural ground on a slope and disassemble and export a formwork without working on the natural ground side.SOLUTION: A concrete formwork 1 and members that are made of steel are mainly used at the site. A separate 2 is passed through a drip hole 3 so that the formwork on slope side can be removed by removing the separate after placing concrete without requiring an operator to enter the site on the slope side. As constructing multiple steps requires the steps to be tightly held in vertical direction even if the formwork is made of steel, a formwork binding metal fitting is formed so as to be spliced.SELECTED DRAWING: Figure 1

Description

      The present invention relates to a retaining wall construction that takes into account shortening of construction period, construction cost reduction, and risk avoidance in emergency disaster recovery work in case of earth and sand disasters and slope failure.

      The conventional method of construction such as retaining walls cuts and removes a large amount of soil in order to assemble the scaffolding by shaving the soil on the mountain side where the retaining wall is to be constructed.

      In addition, the cuts carried out during or after construction are backfilled again on the mountain side behind the retaining wall.

      Concrete revetment blocks are used for river revetment work and road slope retaining walls, but it often takes days from ordering to delivery.

    In the block generally used, experience, physical strength, etc. are indispensable, and the construction days are often long.

    When large blocks are used in mountainous areas, transportation problems often occur.

    Serious disasters may occur during assembly and disassembly of formwork.

    Currently, wooden formwork is common, but natural destruction and environmental pollution caused by garbage are serious problems.

    It is necessary to reduce the cut of the slope where the retaining wall is constructed as much as possible to reduce time, labor costs and fossil fuel.

    There is no color in the slope of concrete work by the conventional construction method and secondary concrete products, and it is a murderous scene.

    In order to eliminate serious disasters caused by slope collapse during construction work, it is necessary not to enter between the retaining wall and slope.

    The concrete formwork and members to be constructed on site will be mainly made of steel.

    The separator was passed through the drainage hole, and after placing the concrete, the separator was removed so that the sloped formwork could be removed without the need for an operator.

    In the case of several stages of construction, a vertical press is required even if the formwork is made of steel, so the home ties can be overlapped and connected. (Figures 2 and 3)

    If the formwork and the separation are not at right angles due to a slanted wall, etc., if the work is done with a separate bend, the formwork will open when the concrete is placed, and accurate construction will not be possible. Install. (Figs. 6 and 7)

    If a sheet pile or the like cannot be constructed on the slope and a formwork or home tie cannot be installed or dismantled, attach a reinforcing plate to the iron plate, apply internal screws, and screw the separate into the formwork. (Fig. 8)

    When attaching a home tie to a place where a drain hole is not required, a single pipe or the like is attached by sandwiching the formwork between the home tie and a member. (Fig. 9-13)

    When an iron plate is installed on the slope side as a formwork, it is not stable, so the member is fixed with an anchor in advance and then placed on the member. A member is attached to the top of the iron plate to prevent misalignment, and the support is fixed with bolts. (FIGS. 10 and 11)

    To set the cap on the slope side so that soil and crushed stones do not flow out of the drain hole, insert the insertion rod with the cap screwed in from the front side, backfill and fix with crushed stone, etc. and then pull out. (Fig. 12)

    There are masonry blocks in secondary concrete products, but in the case of on-site concrete, it is easy to kill, so if necessary for the landscape, use a fake stone pattern. (Fig. 13)

    In places where patterns, colors, etc. of flowers, trees, birds, etc. are required in countries, prefectures, municipalities, etc., use the pattern form, and if color is required, use a dye injection gun. Use a mold with a nipple attached so that it can be poured.

    By reducing the use of wood as much as possible and using steel materials, it is possible to eliminate unnecessary deforestation, reduce industrial waste, shorten construction periods, reduce construction costs, and avoid dangers.

    This method is mainly used in the case of one stage of the mold, and the separator is inserted into the drain hole, and the mold is fixed with a single pipe or the like by holding the mold with a home tie.     This method is mainly used when the formwork is made up of two or more stages. The separator is inserted into the drainage hole, the formwork is held with a home tie and the formwork is fixed with a single pipe, etc., but the lower and upper stages are fixed. To do this, the home ties are stacked in two layers and single pipes are used vertically and horizontally.     Usage method when using home ties in two layers as shown in FIG.     This is a method for constructing straight wall concrete using one level of formwork vertically. The anchor is driven into the foundation of the preceding construction, the formwork on the slope side is inserted, and the front formwork is fixed with a nut. Use a release agent or oil paper so that the mold on the slope side can be easily removed.     Since the upper part usually has a gap between the straight wall and the slope due to the inclination, it can be done with the conventional construction method above the first stage, but if there is a risk of danger in a steep cliff, etc. Insert the second stage into the bolt coming out of the frame, and if possible, tighten both sides with nuts to stabilize.     Install a member with an angle between the separate and the home tie in a construction method where the separation and the formwork are not at right angles, such as when it is not a straight wall. By using this member, it is possible to construct an accurate form with an angled formwork without bending the separate.     FIG. 7 is a detailed view of attachment of members when not perpendicular to FIG. 6.     With a construction method such as when there is a possibility that the formwork on the slope side may not be removed due to disaster recovery etc., attach a reinforcing plate and apply internal screws so that a separate can be attached using an iron plate on the slope side. As a result, the steel plate can be peeled off by removing the separator inserted into the drainage hole after placing the concrete.     In the construction method in the case of using FIG. 8 for a slant wall, a member is fixed to the foundation of the preceding construction with an anchor, and an iron plate is placed on the member to be stabilized.     The construction method of FIG. (1) An iron plate is placed on a member fixed with an anchor and stabilized. (2) Install according to the inclined wall slope. Attach a fixing bracket to the top of the iron plate and tighten it with bolts, and fix the support that fits the distance to the slope to the fixing bracket with bolts. (3) The separator is passed through the drain hole and screwed into the inner screw of the iron plate, the home tie is screwed into the separate screw from the outside of the mold, and the mold is fixed with a single pipe or the like. (4) After placing the concrete, remove the single pipe pipe / home tie on the front side, turn the separate hexagonal bolt and remove it, and remove the formwork on the front side. At the same time as removing the iron plate on the back side, attach a cap to the drain hole, and remove the support and fixing brackets while filling crushed stones.     (1) An upper fixing member of an iron plate. FIG. 5 is a detailed mounting diagram of a bolt for fixing the fixing member and the iron plate and a bolt for fixing the fixing member and the support. (2) A steel plate lower fixing member.     Cap for drain hole. After placing the concrete, remove the formwork, insert it into the drain hole, refill the crushed stone, etc., then turn the insertion rod and loosen it.     Formwork with a hole through which a separate is passed, formwork with a fake stone pattern, and a cross-sectional view thereof.     When it is not good to leave concrete on the landscape, a nipple is attached to the formwork, and the concrete is placed. After the vibrator is used, the dye is injected into the concrete from the nipple using a dye injection gun before setting.

    The apparatus and method for the construction of the retaining wall and the like of the present invention can shorten the construction period, reduce the construction cost, and avoid the danger not only in the emergency disaster recovery construction but also in the ordinary construction.

    The formwork can be assembled with a separate home tie, single pipe pipe, etc. and fixed at a place away from the retaining wall construction site, and then installed at the construction site with a crane.

    Usually, in the revetment work of rivers, etc., secondary product blocks are used, and unreinforced concrete is cast and piled up from the bottom, but in the present invention, concrete is cast with reinforcing bars. Therefore, durability after construction is better than conventional construction methods.

DESCRIPTION OF SYMBOLS 1 ... Formwork 1a ... Formwork separator hole for slant walls 3 steps 1b ... Formwork separator hole for back side 3 steps 2 ... Separator 3 ... Drain hole 4a ... Conventional home Home tie shorter than Thailand. Can be connected in layers.
4b: The same length as a conventional home tie. Can be connected in layers.
5 ... Single pipe pipe 6 ... Release agent or oil paper 7 ... Basic concrete 8 ... Anchor bolt / nut 9 ... Anchor bolt 10 ... Natural mountain / slope 11 ... Iron plate 12.・ ・ Reinforcement plate for inner screw 13 ・ ・ ・ A member used when a drain hole is not required and a home tie is required.
14: A connecting member for the home tie and the separator of the form with an angle.
14a: Bolt with sphere for universal use 14b: Separator connecting member for universal use 15 ... Member for fixing the lower part of the iron plate.
16: Anchor fixing hole 17a: Steel plate fixing member 17b: Steel plate fixing member and iron plate locking bolt
17c: An iron plate fixing member and a support fixing bolt.
DESCRIPTION OF SYMBOLS 18 ... Support 19 ... Formwork connection bolt and nut 20 ... Formwork insertion bolt 21 ... Pattern formwork 22 ... Pattern form cross-sectional view 23 ... Dye injection nipple

Claims (9)

  Reduces cuts in retaining walls on cliffs, slopes, etc., and reduces the amount of backfill work after construction, during transportation, temporary storage and construction of the generated soil Retaining walls that can be shortened, reduced construction costs and avoided danger.   In cliffs, landslides, river revetments, etc., in order to minimize the removal of sediment on the back side, remove it from the front side, eliminate the work on the back side, and safely dismantle the formwork. Separator.   The formwork by the iron plate of Claim 1 which can be demolished even if earth and sand flows in before removal of a formwork.   A member that can be installed without bending the separator in inclined or non-parallel molds. (14 ・ 14a ・ 14b)   A home tie that can be connected in layers when there is a need for two or more single pipe pipes depending on the situation.   A member that can be used when there is no need to use a separator and a home tie needs to be attached to the formwork. (13) A member that can support and stabilize the slope and formwork when there is an inclination.
(15, 16, 17a, 17b, 17c, 18)   Insertion rod and cap that can be attached from the front side to prevent dirt and crushed stone from flowing out from the drain hole.   Retaining walls made of cast-in-place concrete tend to be murdered, but they were processed so that patterns could be made even when cast on-site, and nipples were added so that dyes could be injected where color was required. Formwork. (16, 21, 22, 23)

Images