JP7263164B2 - How to repair wall balustrades - Google Patents

How to repair wall balustrades Download PDF

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JP7263164B2
JP7263164B2 JP2019130057A JP2019130057A JP7263164B2 JP 7263164 B2 JP7263164 B2 JP 7263164B2 JP 2019130057 A JP2019130057 A JP 2019130057A JP 2019130057 A JP2019130057 A JP 2019130057A JP 7263164 B2 JP7263164 B2 JP 7263164B2
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wall balustrade
surface layer
balustrade
scraped
wall
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JP2021014724A (en
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崇裕 新井
勇輔 永井
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Kajima Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Description

本発明は、壁高欄の補修方法に関するものである。 The present invention relates to a method for repairing wall balustrades.

道路橋の壁高欄では、凍結防止剤の散布等によって壁高欄の表面から塩化物イオン等の劣化因子が侵入し、壁高欄の鉄筋及びコンクリートが劣化することがある。このため、例えば、特許文献１には、既設の壁高欄の補修方法が開示されている。特許文献１の技術では、既設の壁高欄の補修される箇所の表層部が斫り取られる。表層部を斫り取られた壁高欄から間隔を空けてプレキャストコンクリートから形成された修復パネルが設置される。表層部を斫り取られた壁高欄と修復パネルとの間にモルタルが充填され、モルタルが固化することにより、壁高欄が補修される。 Deteriorating factors such as chloride ions enter from the surface of the wall balustrade of road bridges due to the spraying of anti-freezing agents, etc., and the reinforcing bars and concrete of the wall balustrade may deteriorate. For this reason, for example, Patent Document 1 discloses a method for repairing an existing wall balustrade. In the technique of Patent Literature 1, the surface layer of the repaired portion of the existing wall balustrade is scraped off. A repair panel made of precast concrete is installed spaced from the stripped balustrade. The wall balustrade is repaired by filling mortar between the wall balustrade from which the surface layer has been scraped off and the repair panel and solidifying the mortar.

特許第５６８８９３７号公報Japanese Patent No. 5688937

ところで、補修後の壁高欄の耐久性については、さらなる向上が要求されている。 By the way, there is a demand for further improvement in the durability of wall balustrades after repair.

そこで本発明は、補修された壁高欄の耐久性を向上させることができる壁高欄の補修方法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for repairing a wall balustrade that can improve the durability of the repaired wall balustrade.

本発明は、既設の壁高欄の表層部を斫り取る斫工程と、斫工程で斫り取った壁高欄の表層部に繊維補強コンクリートを打設する打設工程とを備えた壁高欄の補修方法である。 The present invention is a wall balustrade repair comprising a scraping step of scraping off the surface layer of an existing wall balustrade, and a casting step of placing fiber reinforced concrete on the surface layer of the wall balustrade scraped off in the scraping step. The method.

この構成によれば、斫工程により、既設の壁高欄の表層部が斫り取られ、打設工程により、斫工程で斫り取った壁高欄の表層部に耐久性に優れる繊維補強コンクリートが打設されるため、補修された壁高欄の耐久性を向上させることができる。 According to this configuration, the surface layer of the existing wall balustrade is scraped off in the scraping process, and fiber-reinforced concrete having excellent durability is cast in the surface layer of the wall balustrade scraped off in the scraping process in the casting process. Therefore, the durability of the repaired wall balustrade can be improved.

この場合、斫工程で斫り取られた壁高欄の表層部に鉄筋を配筋する配筋工程をさらに備え、打設工程では、配筋工程で鉄筋が配筋された壁高欄の表層部に、繊維補強コンクリートを打設することが好適である。 In this case, a reinforcing bar arrangement step is further provided in which reinforcing bars are arranged on the surface layer of the wall balustrade that has been scraped off in the scraping process. , it is preferable to pour fiber-reinforced concrete.

この構成によれば、配筋工程により、斫工程で斫り取られた壁高欄の表層部に鉄筋が配筋され、打設工程では、配筋工程で鉄筋が配筋された壁高欄の表層部に繊維補強コンクリートが打設されるため、補修された壁高欄の耐荷力をさらに向上させることができる。 According to this configuration, in the bar arranging step, reinforcing bars are arranged on the surface layer portion of the wall balustrade that has been scraped off in the plucking step, and in the placing step, the surface layer of the wall balustrade on which the reinforcing bars have been arranged in the bar arranging step. Since fiber reinforced concrete is placed in the part, the load-bearing capacity of the repaired wall balustrade can be further improved.

また、打設工程では、車線の幅方向に平行な縦断面による断面視で、路面に対して上方に第１角度をなしつつ上方に延在する第１面と、第１面の上端部から屈曲して路面に対して上方に第１角度より大きい第２角度をなしつつ上方に延在する第２面とを有する壁高欄を形成するように、壁高欄の表層部に繊維補強コンクリートを打設してもよい。 Further, in the placing step, in a cross-sectional view of a longitudinal section parallel to the width direction of the lane, the first surface extends upward while making a first angle with respect to the road surface, and from the upper end of the first surface Fiber reinforced concrete is poured on the surface layer of the wall balustrade so as to form a wall balustrade having a second surface that bends and extends upward while forming a second angle larger than the first angle with respect to the road surface. may be set.

この構成によれば、打設工程では、車線の幅方向に平行な縦断面による断面視で、路面に対して上方に第１角度をなしつつ上方に延在する第１面と、第１面の上端部から屈曲して路面に対して上方に第１角度より大きい第２角度をなしつつ上方に延在する第２面とを有する壁高欄を形成するように、壁高欄の表層部に繊維補強コンクリートが打設されるため、車両が壁高欄に接触したときの接触のエネルギーを低減でき、車両を再び車線に誘導できる可能性を高めることができる。 According to this configuration, in the placing step, in a cross-sectional view of a longitudinal section parallel to the width direction of the lane, the first surface extending upward while forming the first angle upward with respect to the road surface, and the first surface and a second surface that bends from the upper end and extends upward while forming a second angle larger than the first angle with respect to the road surface. Since the reinforcing concrete is placed, it is possible to reduce the contact energy when the vehicle contacts the wall balustrade, and increase the possibility of guiding the vehicle to the lane again.

また、斫工程では、壁高欄の表層部の一部を斫り取り、斫工程で斫り取った壁高欄の表層部の一部と、斫工程で斫り取られていない壁高欄の表層部の他部との境界部は、壁高欄の表面から垂直に壁高欄の内部に至る方向及び鉛直方向のいずれかの方向に対して傾斜しつつ延在する冗長部を含むように、壁高欄の表層部を斫り取ってもよい。 In addition, in the scraping process, a part of the surface layer of the wall balustrade is scraped off, and the part of the surface layer of the wall balustrade scraped off in the scraping process and the surface layer of the wall balustrade that is not scraped off in the scraping process The boundary between the wall balustrade and the other part includes a redundant part that extends from the surface of the wall balustrade vertically to the inside of the wall balustrade while being inclined with respect to either the vertical direction or the wall balustrade. The superficial layer may be scraped off.

この構成によれば、斫工程では、壁高欄の表層部の一部が斫り取られるが、斫工程で斫り取った壁高欄の表層部の一部と、斫工程で斫り取られていない壁高欄の表層部の他部との境界部は、壁高欄の表面から垂直に壁高欄の内部に至る方向及び鉛直方向のいずれかの方向に対して傾斜しつつ延在する冗長部を含むように、壁高欄の表層部が斫り取られるため、水等が侵入する経路を長くし、補修された壁高欄の耐久性をさらに向上させることができる。 According to this configuration, a part of the surface layer portion of the wall balustrade is scraped off in the scraping step, and the part of the surface layer portion of the wall balustrade scraped off in the scraping step and the surface layer portion of the wall railing scraped off in the scraping step are scraped off. The boundary between the surface layer of the wall balustrade and the other part includes a redundant part that extends from the surface of the wall balustrade vertically to the inside of the wall balustrade while being inclined with respect to one of the vertical directions. Thus, since the surface layer of the wall balustrade is scraped off, the path through which water or the like enters is lengthened, and the durability of the repaired wall balustrade can be further improved.

また、斫工程では、壁高欄の表層部の一部を斫り取り、斫工程で斫り取った壁高欄の表層部の一部と、斫工程で斫り取られていない壁高欄の表層部の他部との境界部に樹脂を塗布する塗布工程をさらに備え、打設工程では、塗布工程で境界部に樹脂が塗布された壁高欄の表層部の一部に繊維補強コンクリートを打設してもよい。 In addition, in the scraping process, a part of the surface layer of the wall balustrade is scraped off, and the part of the surface layer of the wall balustrade scraped off in the scraping process and the surface layer of the wall balustrade that is not scraped off in the scraping process A coating process is further provided to apply resin to the boundary with other parts, and in the casting process, fiber reinforced concrete is cast on a part of the surface layer of the wall balustrade that has been coated with resin at the boundary in the coating process. may

この構成によれば、斫工程では、壁高欄の表層部の一部が斫り取られるが、塗布工程により、斫工程で斫り取った壁高欄の表層部の一部と、斫工程で斫り取られていない壁高欄の表層部の他部との境界部に樹脂が塗布され、打設工程では、塗布工程で境界部に樹脂が塗布された壁高欄の表層部の一部に繊維補強コンクリートが打設されるため、水等が侵入する経路の耐水性を高め、補修された壁高欄の耐久性をさらに向上させることができる。 According to this configuration, in the scraping process, a part of the surface layer of the wall balustrade is scraped off, but in the coating process, the part of the surface layer of the wall balustrade scraped off in the scraping process and the surface layer part of the wall balustrade scraped off in the scraping process are scraped off. Resin is applied to the boundary with other parts of the surface layer of the wall balustrade that has not been removed. Since the concrete is placed, the water resistance of the path through which water or the like penetrates can be increased, and the durability of the repaired wall balustrade can be further improved.

本発明の壁高欄の補修方法によれば、補修された壁高欄の耐久性を向上させることができる。 According to the method for repairing the wall balustrade of the present invention, the durability of the repaired wall balustrade can be improved.

実施形態に係る壁高欄の補修方法が行われる壁高欄を示す車線の幅方向に平行な縦断面による斜視断面図である。It is a perspective sectional view by the longitudinal section parallel to the width direction of the lane which shows the wall balustrade in which the repair method of the wall balustrade based on embodiment is performed. 図１に示す壁高欄に斫工程が行われた状態を示す斜視断面図である。FIG. 2 is a perspective cross-sectional view showing a state in which the wall balustrade shown in FIG. 1 is subjected to a picking process; 図２に示す壁高欄に配筋工程が行われた状態を示す斜視断面図である。FIG. 3 is a perspective cross-sectional view showing a state in which a bar arrangement process has been performed on the wall balustrade shown in FIG. 2 ; 図３に示す壁高欄に塗布工程が行われた状態を示す斜視断面図である。4 is a perspective cross-sectional view showing a state in which a coating process has been performed on the wall balustrade shown in FIG. 3; FIG. 図４に示す壁高欄に打設工程が行われた状態を示す斜視断面図である。FIG. 5 is a perspective cross-sectional view showing a state in which the wall balustrade shown in FIG. 4 is subjected to a placing step; 図１に示す壁高欄の天端の全面にも斫工程が行われた状態を示す斜視断面図である。1. It is perspective sectional drawing which shows the state by which the picking process was performed also on the whole surface of the top end of the wall balustrade shown in FIG. 図６に示す壁高欄に配筋工程、塗布工程及び打設工程が行われた状態を示す斜視断面図である。FIG. 7 is a perspective cross-sectional view showing a state in which the wall balustrade shown in FIG. 6 has undergone a bar arrangement process, a coating process, and a placing process.

以下、図面を参照しつつ本発明に係る壁高欄の補修方法の実施形態について詳細に説明する。図１に示すように、本実施形態の壁高欄の補修方法が行われる壁高欄１は、道路橋における床版３０の車線１００の幅方向Ｙの両端部に設けられている。壁高欄１のコンクリート３の内部には、鉄筋２が配筋されている。壁高欄１の表面１４は、車線１００の幅方向Ｙに平行な縦断面による断面視で、図中に破線で示す床版３０の上に舗装面が形成された場合の路面１１０に対して垂直な角度をなしつつ上方に延在している。つまり、壁高欄１は直壁型である。 Hereinafter, an embodiment of a method for repairing a wall balustrade according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the balustrade 1 on which the method of repairing the balustrade of the present embodiment is performed is provided at both ends in the width direction Y of the lane 100 of the floor slab 30 of the road bridge. A reinforcing bar 2 is arranged inside the concrete 3 of the wall balustrade 1. - 特許庁The surface 14 of the balustrade 1 is perpendicular to the road surface 110 when a pavement surface is formed on the floor slab 30 indicated by the dashed line in the cross-sectional view of the longitudinal section parallel to the width direction Y of the lane 100. extending upward at an angle. That is, the wall balustrade 1 is a straight wall type.

本実施形態では、凍結防止剤の散布等によって壁高欄１の表面から塩化物イオン等の劣化因子が侵入し、壁高欄１の鉄筋２及びコンクリート３が劣化し、壁高欄１の一部が補修される際に適用される。なお、以下の説明及び図１～５において、車線方向Ｘ、車線１００の幅方向Ｙ及び鉛直方向Ｚが示される。 In this embodiment, deterioration factors such as chloride ions enter from the surface of the wall balustrade 1 due to the spraying of an anti-freezing agent or the like, the reinforcing bars 2 and the concrete 3 of the wall balustrade 1 deteriorate, and the wall balustrade 1 is partially repaired. applied when 1 to 5, the lane direction X, the width direction Y of the lane 100, and the vertical direction Z are shown.

まず、電子線マイクロアナライザ（ＥＰＭＡ：Electoron Probe MicroAnalyzer）試験及びコア抜き試験等により、壁高欄１の劣化の度合が診断され、壁高欄１の補修される箇所及び補修される車線１００の幅方向Ｙの厚さが設定される。図２に示すように、既設の壁高欄１の表層部４を斫り取る斫工程が行われる。斫工程は、例えば、ウォータージェット等により行われる。斫工程では、壁高欄１の表層部４の一部１１が斫り取られる。斫り取られた壁高欄１の表層部４の一部１１は、設定された壁高欄１の補修される箇所を含み、設定された補修される車線１００の幅方向Ｙの厚さ以上に斫り取られている。 First, the degree of deterioration of the wall balustrade 1 is diagnosed by an electron probe microanalyzer (EPMA: Electron Probe MicroAnalyzer) test, a core extraction test, etc., and the portion to be repaired of the wall balustrade 1 and the width direction Y of the lane 100 to be repaired thickness is set. As shown in FIG. 2, a scraping process is performed to scrape off the surface layer portion 4 of the existing wall balustrade 1 . The picking process is performed by, for example, a water jet or the like. In the scraping process, a part 11 of the surface layer portion 4 of the balustrade 1 is scraped off. A part 11 of the surface layer 4 of the wall balustrade 1 that has been stripped includes the set portion of the wall balustrade 1 to be repaired, and has a thickness greater than the set thickness in the width direction Y of the lane 100 to be repaired. are taken.

斫工程では、斫工程で斫り取った壁高欄１の表層部４の一部１１と、斫工程で斫り取られていない壁高欄１の表層部４の他部１２との境界部１３は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向（例えば、車線１００の幅方向Ｙ）及び鉛直方向Ｚに対して傾斜しつつ延在する冗長部１５を含むように、壁高欄１の表層部４が斫り取られる。つまり、境界部１３の冗長部１５は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向及び鉛直方向Ｚに沿った最短距離で延在していない。本実施形態では、冗長部１５は、ウォータージェットにより斫り取られたことによる不規則な凹凸面を有する。 In the plucking process, the boundary part 13 between the part 11 of the surface layer part 4 of the wall balustrade 1 that has been stripped off in the plucking process and the other part 12 of the surface layer part 4 of the wall balustrade 1 that has not been stripped off in the plucking process , a direction from the surface 14 of the wall balustrade 1 to the inside of the wall balustrade 1 (for example, the width direction Y of the lane 100) and a redundant portion 15 extending while being inclined with respect to the vertical direction Z. The surface layer 4 of the balustrade 1 is scraped off. That is, the redundant portion 15 of the boundary portion 13 does not extend vertically from the surface 14 of the wall balustrade 1 to the inside of the wall balustrade 1 and the shortest distance along the vertical direction Z. In this embodiment, the redundant portion 15 has an irregular uneven surface that is scraped off by a water jet.

なお、冗長部１５は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向及び鉛直方向Ｚのいずれかのみに対して傾斜しつつ延在してもよい。また、冗長部１５は境界部１３の一部にのみ含まれていてもよい。また、冗長部１５は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向及び鉛直方向Ｚのいずれかに対して傾斜している平面でもよい。また、冗長部１５は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向及び鉛直方向Ｚのいずれかに対して傾斜している部位を含む規則的な形状を有していてもよい。 In addition, the redundant portion 15 may extend from the surface 14 of the wall balustrade 1 vertically to the inside of the wall balustrade 1 while being inclined with respect to only one of the direction Z and the vertical direction Z. Also, the redundant portion 15 may be included only in part of the boundary portion 13 . Further, the redundant portion 15 may be a plane that is inclined with respect to either the direction extending vertically from the surface 14 of the wall balustrade 1 to the inside of the wall balustrade 1 or the vertical direction Z. In addition, the redundant portion 15 has a regular shape including a portion that is inclined with respect to either the direction extending vertically from the surface 14 of the wall balustrade 1 to the inside of the wall balustrade 1 or the vertical direction Z. good too.

図３に示すように、斫工程で斫り取られた壁高欄１の表層部４に鉄筋５，６を配筋する配筋工程が行われる。配筋工程では、後述する打設工程で打設されるコンクリートの硬化後の形状に合わせて配筋が行われる。鉄筋５，６は、床版３０の中に埋設されるアンカー筋となる部位を含む。なお、説明の簡略化のために、一部の鉄筋５，６のみが図示される。また、既設の鉄筋２及び配筋工程で配筋された鉄筋５，６の表面にエポキシ樹脂等の樹脂が塗布されてもよい。また、配筋工程では、炭素繊維強化プラスチック（ＣＦＲＰ：Carbon Fiber Reinforced Plastics）から形成された補強筋等が配筋されてもよい。 As shown in FIG. 3, a reinforcement arrangement step is performed to arrange reinforcing bars 5 and 6 on the surface layer portion 4 of the balustrade 1 that has been removed in the removal step. In the reinforcing bar arrangement step, reinforcing bars are arranged in accordance with the shape of concrete after hardening that is placed in the placing step described later. The reinforcing bars 5 and 6 include portions that serve as anchor bars embedded in the floor slab 30 . For simplification of explanation, only some of the reinforcing bars 5 and 6 are illustrated. Moreover, a resin such as an epoxy resin may be applied to the surfaces of the existing reinforcing bars 2 and the reinforcing bars 5 and 6 arranged in the reinforcing bar arrangement process. Further, in the bar arrangement step, reinforcing bars or the like formed from carbon fiber reinforced plastics (CFRP) may be arranged.

図４に示すように、斫工程で斫り取った壁高欄１の表層部４の一部１１と、斫工程で斫り取られていない壁高欄１の表層部４の他部１２との境界部１３に樹脂１６を塗布する塗布工程が行われる。樹脂１６には、例えば、エポキシ樹脂を適用できる。なお、配筋工程と塗布工程とは、いずれが先に行われ、いずれが後に行われてもよい。また、一部１１を連続した境界部１３が囲繞するように斫工程が行われ、当該境界部１３に塗布工程が行われてもよい。 As shown in FIG. 4, a boundary between a portion 11 of the surface layer portion 4 of the wall balustrade 1 that has been scraped off in the scraping process and the other portion 12 of the surface layer portion 4 of the wall balustrade 1 that has not been scraped off in the scraping step. A coating step of coating the resin 16 on the portion 13 is performed. Epoxy resin, for example, can be applied to the resin 16 . Note that either the bar arrangement process or the application process may be performed first, or either may be performed later. Alternatively, the scraping step may be performed so that the continuous boundary portion 13 surrounds the portion 11 , and the coating step may be performed on the boundary portion 13 .

図５に示すように、斫工程で斫り取った壁高欄１の表層部４に繊維補強コンクリート２０を打設する打設工程が行われる。繊維補強コンクリート２０は、合成繊維及び鋼繊維等が複合されたコンクリートである。打設工程は、例えば、左官工事及び吹付工事等により行われる。打設工程では、配筋工程で鉄筋５，６が配筋された壁高欄１の表層部４に、繊維補強コンクリートが打設される。打設工程では、塗布工程で境界部１３に樹脂１６が塗布された壁高欄１の表層部４の一部１１に繊維補強コンクリート２０が打設される。 As shown in FIG. 5, a placing process is performed to place fiber reinforced concrete 20 on the surface layer 4 of the balustrade 1 that has been skimmed off in the skimming process. The fiber-reinforced concrete 20 is concrete in which synthetic fibers, steel fibers, and the like are combined. The placing process is performed by, for example, plastering work and spraying work. In the placing step, fiber reinforced concrete is placed on the surface layer portion 4 of the balustrade 1 to which the reinforcing bars 5 and 6 have been placed in the reinforcing step. In the placing step, the fiber reinforced concrete 20 is placed in the portion 11 of the surface layer portion 4 of the balustrade 1 to which the resin 16 has been applied to the boundary portion 13 in the coating step.

繊維補強コンクリート２０には、例えば、超高強度繊維補強コンクリート（ＵＦＣ；Ultrahigh strength Fiber reinforcedConcrete）が適用されてもよい。超高強度繊維補強コンクリートの性状の一例を以下説明する。この超高強度繊維補強コンクリートは、例えば、セメントと、骨材と、練混ぜ水と、コンクリート用化学混和剤と、補強用繊維とを含む混合物が硬化してなるものである。上記のセメントは、例えば、普通ポルトランドセメント、早強ポルトランドセメント、中庸熱ポルトランドセメント、耐硫酸塩ポルトランドセメント、又は低熱ポルトランドセメントである。 For the fiber reinforced concrete 20, for example, ultrahigh strength fiber reinforced concrete (UFC) may be applied. An example of the properties of ultra-high strength fiber reinforced concrete will be described below. This ultra-high-strength fiber-reinforced concrete is obtained by hardening a mixture containing, for example, cement, aggregate, mixing water, a chemical admixture for concrete, and reinforcing fibers. Said cements are, for example, ordinary Portland cement, high-early-strength Portland cement, moderate-heat Portland cement, sulfate-resistant Portland cement, or low-heat Portland cement.

一例として、上述の骨材は、粒径２．５ｍｍ以下、絶乾密度２．５ｇ／ｃｍ３以上、吸水率３．０％以下、粘土塊量１．０％以下、微粒分量２．０％以下、ＮａＣｌ含有量０．０２％以下、の骨材である。この骨材は、ＪＩＳＡ １１０５に規定された細骨材の有機不純物試験方法による有機不純物の試験結果が「淡い」とされたものである。また、この骨材は、ＪＩＳ Ａ １１２２に規定された硫酸ナトリウムでの骨材の安定性試験方法による安定性が１０％以下であって、更にＪＩＳＡ ５３０８付属書１に規定されたアルカリシリカ反応性による区分が区分Ａである骨材である。 As an example, the above-mentioned aggregate has a particle size of 2.5 mm or less, an absolute dry density of 2.5 g/cm 3 or more, a water absorption of 3.0% or less, a clay lump content of 1.0% or less, and a fine particle content of 2.0%. Hereinafter, aggregates having a NaCl content of 0.02% or less are used. This aggregate was judged to be "pale" in the test result of organic impurities according to the organic impurity test method for fine aggregate specified in JISA 1105. In addition, this aggregate has a stability of 10% or less according to the stability test method for aggregates with sodium sulfate specified in JIS A 1122, and the alkali silica reactivity specified in JISA 5308 Annex 1. It is an aggregate whose division by is division A.

上述の練混ぜ水は、例えば、ＪＳＣＥ－Ｂ １０１－２００５に規定された回収水以外の練混ぜ水である。上述のコンクリート用化学混和剤は、ＪＩＳＡ ６２０４に規定された高性能減水剤である。また、上述の補強用繊維は、直径０．１～０．２５ｍｍ、長さ１０～２４ｍｍ、及び引張強度２×１０３Ｎ／ｍｍ２以上の繊維である。上述の補強用繊維は、例えば、鋼繊維、高強度アラミド繊維、高密度ポリエチレン繊維、又は炭素繊維であってもよい。 The above-mentioned kneading water is, for example, kneading water other than the recovered water specified in JSCE-B 101-2005. The above chemical admixture for concrete is a high performance water reducing agent specified in JISA 6204. Further, the above reinforcing fibers are fibers having a diameter of 0.1 to 0.25 mm, a length of 10 to 24 mm, and a tensile strength of 2×10 3 N/mm 2 or more. The reinforcing fibers mentioned above may be, for example, steel fibres, high strength aramid fibres, high density polyethylene fibres, or carbon fibres.

超高強度繊維補強コンクリートは、例えば、マトリクスが、ポルトランドセメント、ポゾラン材、及びエトリンガイド生成系材料から成る結合材、粒径２．５ｍｍ以下の骨材、水、並びに減水剤によって構成されている。また、補強用繊維は、直径０．２ｍｍ、長さ１５ｍｍ（製造誤差±２ｍｍ未満）、及び引張強度２×１０３Ｎ／ｍｍ２以上の鋼繊維と、直径０．２ｍｍ、長さ２２ｍｍ（製造誤差±２ｍｍ未満）、及び引張強度２×１０３Ｎ／ｍｍ２以上の鋼繊維とを混合したものを１．７５ｖｏｌ．％混入させたものであってもよい。また、超高強度繊維補強コンクリートの硬化後の特性値は、圧縮強度１５０Ｎ／ｍｍ２以上、ひび割れ発生強度４Ｎ／ｍｍ２以上、引張強度５Ｎ／ｍｍ２以上、透水係数１×１０-１１ｃｍ／ｓ未満、塩化物イオン拡散係数０．１４ｃｍ２／年未満、すり減り係数２４０ｍｍ３／ｃｍ２未満であることが好ましい。 The ultra-high-strength fiber-reinforced concrete, for example, the matrix is composed of a binder consisting of Portland cement, a pozzolanic material, and an etrin guide-generating material, an aggregate having a particle size of 2.5 mm or less, water, and a water reducing agent. there is In addition, the reinforcing fibers are steel fibers with a diameter of 0.2 mm and a length of 15 mm (manufacturing error of less than ±2 mm) and a tensile strength of 2 × 10 3 N/mm 2 or more, and a diameter of 0.2 mm and a length of 22 mm (manufacturing error of less than ±2 mm) and tensile strength of 2×10 3 N/mm 2 or more. % may be mixed. In addition, the characteristic values of the ultra-high-strength fiber-reinforced concrete after hardening are compression strength of 150 N/mm 2 or more, crack initiation strength of 4 N/mm 2 or more, tensile strength of 5 N/mm 2 or more, and hydraulic conductivity of 1 × 10 -11 cm/. s, a chloride ion diffusion coefficient of less than 0.14 cm 2 /year, and an abrasion coefficient of less than 240 mm 3 /cm 2 .

超高強度繊維補強コンクリートの標準示方配合は、フロー値２５０±２０ｍｍ、結合材に対する練混ぜ水の比率が１５％、空気量２．０％、練混ぜ水１９５ｋｇ／ｍ３、結合材１２８７ｋｇ／ｍ３、骨材９０５ｋｇ／ｍ３、高性能減水剤３２．２ｋｇ／ｍ３、及び補強用繊維１３７．４ｋｇ／ｍ３（１．７５ｖｏｌ．％）とすることができる。 The standard formulation of ultra-high-strength fiber-reinforced concrete is a flow value of 250 ± 20 mm, a mixing water ratio of 15% to the binder, an air content of 2.0%, a mixing water of 195 kg/m 3 , and a binder of 1287 kg/m. 3 , aggregate 905 kg/m 3 , superplasticizer 32.2 kg/m 3 , and reinforcing fiber 137.4 kg/m 3 (1.75 vol.%).

打設工程では、車線１００の幅方向Ｙに平行な縦断面による断面視で、路面１１０に対して上方に第１角度θ１をなしつつ上方に延在する第１面２１と、第１面２１の上端部２２から屈曲して路面１１０に対して上方に第１角度θ１より大きい第２角度θ２をなしつつ上方に延在する第２面２３とを有する壁高欄１を形成するように、壁高欄１の表層部４に繊維補強コンクリート２０が打設される。つまり、本実施形態では、直壁型からフロリダ型への壁高欄の改修が行われる。 In the placing step, in a cross-sectional view of a longitudinal section parallel to the width direction Y of the lane 100, the first surface 21 extending upward while forming a first angle θ1 upward with respect to the road surface 110, and the first surface 21 The wall balustrade 1 is formed so as to have a second surface 23 that bends from an upper end 22 and extends upward while forming a second angle θ2 larger than the first angle θ1 with respect to the road surface 110 . A fiber reinforced concrete 20 is placed on the surface layer 4 of the balustrade 1 . In other words, in this embodiment, the wall balustrade is repaired from the straight wall type to the Florida type.

本実施形態によれば、斫工程により、既設の壁高欄１の表層部４が斫り取られ、打設工程により、斫工程で斫り取った壁高欄１の表層部４に耐久性に優れる繊維補強コンクリート２０が打設されるため、補修された壁高欄１の耐久性を向上させることができる。 According to this embodiment, the surface layer part 4 of the existing wall balustrade 1 is scraped off by the scraping process, and the surface layer part 4 of the wall balustrade 1 scraped off by the scraping process is excellent in durability by the casting process. Since the fiber reinforced concrete 20 is placed, the durability of the repaired wall balustrade 1 can be improved.

また、本実施形態によれば、配筋工程により、斫工程で斫り取られた壁高欄１の表層部４に鉄筋５，６が配筋され、打設工程では、配筋工程で鉄筋５，６が配筋された壁高欄１の表層部４に繊維補強コンクリート２０が打設されるため、補修された壁高欄１の耐荷力をさらに向上させることができる。 Further, according to the present embodiment, the reinforcing bars 5 and 6 are arranged in the surface layer portion 4 of the wall balustrade 1 that has been scraped off in the scraping process, and the reinforcing bars 5 and 6 are arranged in the reinforcing bar arrangement process in the placing process. , 6 are placed on the surface layer 4 of the wall balustrade 1, the load-bearing capacity of the repaired wall balustrade 1 can be further improved.

また、本実施形態によれば、打設工程では、車線１００の幅方向Ｙに平行な縦断面による断面視で、路面１１０に対して上方に第１角度θ１をなしつつ上方に延在する第１面２１と、第１面２１の上端部２２から屈曲して路面１１０に対して上方に第１角度θ１より大きい第２角度θ２をなしつつ上方に延在する第２面２３とを有する壁高欄１を形成するように、壁高欄１の表層部４に繊維補強コンクリート２０が打設されるため、車両が壁高欄１に接触したときの接触のエネルギーを低減でき、車両を再び車線１００に誘導できる可能性を高めることができる。 In addition, according to the present embodiment, in the placing step, in a cross-sectional view of a longitudinal section parallel to the width direction Y of the lane 100, the first angle .theta. A wall having a first surface 21 and a second surface 23 that bends from an upper end 22 of the first surface 21 and extends upward while forming a second angle θ2 larger than the first angle θ1 with respect to the road surface 110. Since the fiber reinforced concrete 20 is placed on the surface layer 4 of the wall balustrade 1 so as to form the balustrade 1, the energy of contact when the vehicle contacts the wall balustrade 1 can be reduced, and the vehicle can be moved to the lane 100 again. You can increase the possibility of induction.

また、本実施形態によれば、斫工程では、壁高欄１の表層部４の一部１１が斫り取られるが、斫工程で斫り取った壁高欄１の表層部４の一部１１と、斫工程で斫り取られていない壁高欄１の表層部４の他部１２との境界部１３は、壁高欄１の表面１４から垂直に壁高欄１の内部に至る方向及び鉛直方向Ｚのいずれかの方向に対して傾斜しつつ延在する冗長部１５を含むように、壁高欄１の表層部４が斫り取られるため、水等が侵入する経路を長くし、補修された壁高欄１の耐久性をさらに向上させることができる。 Further, according to the present embodiment, the part 11 of the surface layer part 4 of the wall balustrade 1 is scraped off in the scraping process, but the part 11 of the surface layer part 4 of the wall balustrade 1 scraped off in the scraping process , the boundary part 13 between the surface layer part 4 of the wall balustrade 1 and the other part 12, which is not scraped off in the scraping process, extends vertically from the surface 14 of the wall balustrade 1 to the inside of the wall balustrade 1 and in the vertical direction Z Since the surface layer part 4 of the wall balustrade 1 is scraped off so as to include the redundant part 15 extending while being inclined with respect to any direction, the route for water or the like to enter is lengthened, and the repaired wall balustrade 1 can be further improved in durability.

また、本実施形態によれば、斫工程では、壁高欄１の表層部４の一部１１が斫り取られるが、塗布工程により、斫工程で斫り取った壁高欄１の表層部４の一部１１と、斫工程で斫り取られていない壁高欄１の表層部４の他部１２との境界部１３に樹脂１６が塗布され、打設工程では、塗布工程で境界部１３に樹脂１６が塗布された壁高欄１の表層部４の一部に繊維補強コンクリート２０が打設されるため、水等が侵入する経路の耐水性を高め、補修された壁高欄１の耐久性をさらに向上させることができる。 Further, according to the present embodiment, a part 11 of the surface layer part 4 of the wall balustrade 1 is scraped off in the scraping process, but the surface layer part 4 of the wall balustrade 1 scraped off in the scraping process is removed by the coating process. A resin 16 is applied to the boundary part 13 between the part 11 and the other part 12 of the surface layer part 4 of the wall balustrade 1 that is not scraped off in the scraping process. Since the fiber reinforced concrete 20 is placed in a part of the surface layer 4 of the wall balustrade 1 to which 16 is applied, the water resistance of the path through which water or the like enters is increased, and the repaired wall balustrade 1 is further durable. can be improved.

本発明は、上述した実施形態を始めとして、当業者の知識に基づいて種々の変更、改良を施した様々な形態で実施することができる。また、上述した実施形態に記載されている技術的事項を利用して変形例を構成することも可能である。例えば、配筋工程及び塗布工程のいずれかが省略されてもよい。また、斫工程では、壁高欄の表層部の全部が斫り取られて、打設工程では、壁高欄の表層部の全部に繊維補強コンクリートが打設されてもよい。また斫工程において、冗長部１５は設けられなくてもよい。また、本実施形態の壁高欄１の補修方法が行われる前の壁高欄１が直壁型であり、本実施形態の壁高欄１の補修方法が行われた後の壁高欄１が直壁型でもよい。また、本実施形態の壁高欄１の補修方法が行われる前の壁高欄１がフロリダ型であり、本実施形態の壁高欄１の補修方法が行われた後の壁高欄１がフロリダ型でもよい。本実施形態の壁高欄１の補修方法が行われる前の壁高欄１がフロリダ型であり、本実施形態の壁高欄１の補修方法が行われた後の壁高欄１が直壁型でもよい。また、図６に示すように、壁高欄１の天端の全面にも上記実施形態と同様に斫工程が行われ、図７に示すように、天端の全面にも斫工程が行われた壁高欄１に上記実施形態と同様に配筋工程、塗布工程及び打設工程が行われてもよい。 The present invention can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art, including the embodiment described above. Moreover, it is also possible to configure a modified example using the technical matters described in the above-described embodiments. For example, either the bar arrangement step or the application step may be omitted. Further, in the scraping step, the entire surface layer of the wall balustrade may be scraped off, and in the placing step, fiber reinforced concrete may be placed in the entire surface layer of the wall balustrade. Moreover, the redundant portion 15 may not be provided in the picking process. Further, the wall balustrade 1 before the repair method of the wall balustrade 1 of the present embodiment is performed is a straight wall type, and the wall balustrade 1 after the repair method of the wall balustrade 1 of the present embodiment is performed is a straight wall type. It's okay. Moreover, the wall balustrade 1 before the repair method of the wall balustrade 1 of the present embodiment is performed may be of the Florida type, and the wall balustrade 1 after the repair method of the wall balustrade 1 of the present embodiment may be of the Florida type. . The balustrade 1 before the repair method of the balustrade 1 of the present embodiment is performed may be of the Florida type, and the balustrade 1 after the repair method of the balustrade 1 of the present embodiment may be of the straight wall type. Further, as shown in FIG. 6, the entire surface of the top end of the wall balustrade 1 was also subjected to the squeezing process in the same manner as in the above-described embodiment, and as shown in FIG. The wall balustrade 1 may be subjected to the bar arrangement process, the coating process and the placing process in the same manner as in the above-described embodiment.

１…壁高欄、２…鉄筋、３…コンクリート、４…表層部、５，６…鉄筋、１１…一部、１２…他部、１３…境界部、１４…表面、１５…冗長部、１６…樹脂、２０…繊維補強コンクリート、２１…第１面、２２…上端部、２３…第２面、３０…床版、１００…車線、１１０…路面、Ｘ…車線方向、Ｙ…幅方向、Ｚ…鉛直方向、θ１…第１角度、θ２…第２角度。 DESCRIPTION OF SYMBOLS 1... Wall balustrade, 2... Reinforcing bar, 3... Concrete, 4... Surface layer part, 5, 6... Reinforcement bar, 11... One part, 12... Other part, 13... Boundary part, 14... Surface, 15... Redundant part, 16... Resin 20 Fiber reinforced concrete 21 First surface 22 Upper end 23 Second surface 30 Floor slab 100 Lane 110 Road surface X Lane direction Y Width direction Z Vertical direction, θ1... first angle, θ2... second angle.

Claims (3)

既設の壁高欄の表層部を斫り取る斫工程と、
前記斫工程で斫り取られた前記壁高欄の前記表層部に鉄筋を配筋する配筋工程と、
前記斫工程で斫り取られ前記配筋工程で前記鉄筋が配筋された前記壁高欄の前記表層部に繊維補強コンクリートを打設する打設工程と、
を備え、
前記打設工程では、車線の幅方向に平行な縦断面による断面視で、路面に対して上方に第１角度をなしつつ上方に延在する第１面と、前記第１面の上端部から屈曲して前記路面に対して上方に前記第１角度より大きい第２角度をなしつつ上方に延在する第２面とを有する前記壁高欄を形成するように、前記壁高欄の前記表層部に前記繊維補強コンクリートを打設し、
前記配筋工程では、
前記第１面と前記第２面との形状に合わせて新たな前記鉄筋を配筋し、新たな前記鉄筋の端部を、前記斫工程で露出された既設の鉄筋に定着させる、壁高欄の補修方法。 A scraping process of scraping off the surface layer of the existing wall balustrade;
A bar arranging step of arranging reinforcing bars in the surface layer portion of the wall balustrade that has been scraped off in the scraping step;
a placing step of placing fiber reinforced concrete on the surface layer portion of the wall balustrade that has been scraped off in the scraping step and the reinforcing bars have been arranged in the bar arrangement step;
with
In the placing step, in a cross-sectional view of a longitudinal section parallel to the width direction of the lane, a first surface extending upward while making a first angle with respect to the road surface, and from the upper end of the first surface and a second surface extending upward while bending to form a second angle larger than the first angle with respect to the road surface. Casting the fiber reinforced concrete,
In the bar arrangement process,
A wall balustrade, wherein the new reinforcing bars are arranged according to the shapes of the first surface and the second surface, and the ends of the new reinforcing bars are fixed to the existing reinforcing bars exposed in the squeezing process. Repair method. 前記斫工程では、
前記壁高欄の前記表層部の一部を斫り取り、
前記斫工程で斫り取った前記壁高欄の前記表層部の一部と、前記斫工程で斫り取られていない前記壁高欄の前記表層部の他部との境界部は、前記壁高欄の表面から垂直に前記壁高欄の内部に至る方向及び鉛直方向のいずれかの方向に対して傾斜しつつ延在する冗長部を含むように、前記壁高欄の表層部を斫り取る、請求項１に記載の壁高欄の補修方法。 In the picking process,
A part of the surface layer of the wall balustrade is scraped off,
A boundary portion between a portion of the surface layer portion of the wall balustrade that has been scraped off in the scraping step and the other portion of the surface layer portion of the wall balustrade that has not been scraped off in the scraping step is the boundary portion of the wall balustrade. 2. The surface part of the wall balustrade is scraped off so as to include a redundant part extending from the surface perpendicularly to the inside of the wall balustrade while being inclined with respect to either one of the direction and the vertical direction . The method for repairing the wall balustrade described in . 前記斫工程では、前記壁高欄の前記表層部の一部を斫り取り、
前記斫工程で斫り取った前記壁高欄の前記表層部の一部と、前記斫工程で斫り取られていない前記壁高欄の前記表層部の他部との境界部に樹脂を塗布する塗布工程をさらに備え、
前記打設工程では、前記塗布工程で前記境界部に樹脂が塗布された前記壁高欄の前記表層部の一部に前記繊維補強コンクリートを打設する、請求項１又は２に記載の壁高欄の補修方法。 In the scraping step, a part of the surface layer portion of the wall balustrade is scraped off,
Coating for applying a resin to a boundary portion between a portion of the surface layer portion of the wall balustrade that has been skimmed off in the skidding step and the other portion of the surface layer portion of the wall balustrade that has not been skimmed off in the skidding step. Equipped with further processes,
3. The wall balustrade according to claim 1 or 2, wherein in the placing step, the fiber reinforced concrete is placed in a part of the surface layer portion of the wall balustrade to which the resin has been applied to the boundary portion in the applying step. Repair method.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002167977A (en) 2000-11-29 2002-06-11 Kajima Corp Lower surface thickness increasing and reinforcing method for reinforced concrete floor slab
JP2007278043A (en) 2006-04-12 2007-10-25 Ohbayashi Corp Method and structure for reinforcing reinforced concrete structural member
JP2008240427A (en) 2007-03-28 2008-10-09 Kajima Corp Existing rc member reinforcing method and existing rc member reinforcing panel
JP2015071907A (en) 2013-10-03 2015-04-16 株式会社奥村組 Mounting structure of concrete wall railing
JP2016094747A (en) 2014-11-14 2016-05-26 東日本高速道路株式会社 Repair method and repair structure using repair panel for concrete structure
JP2018178497A (en) 2017-04-11 2018-11-15 鹿島建設株式会社 Method of placing fiber reinforced concrete, and boundary member

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6164956A (en) * 1984-09-04 1986-04-03 株式会社ダイフレックス In-site spray finishing construction method by fiber reinforced cement
JPH10252017A (en) * 1997-03-14 1998-09-22 Ozawa Concrete Kogyo Kk Balustrade constructed of concrete panel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002167977A (en) 2000-11-29 2002-06-11 Kajima Corp Lower surface thickness increasing and reinforcing method for reinforced concrete floor slab
JP2007278043A (en) 2006-04-12 2007-10-25 Ohbayashi Corp Method and structure for reinforcing reinforced concrete structural member
JP2008240427A (en) 2007-03-28 2008-10-09 Kajima Corp Existing rc member reinforcing method and existing rc member reinforcing panel
JP2015071907A (en) 2013-10-03 2015-04-16 株式会社奥村組 Mounting structure of concrete wall railing
JP2016094747A (en) 2014-11-14 2016-05-26 東日本高速道路株式会社 Repair method and repair structure using repair panel for concrete structure
JP2018178497A (en) 2017-04-11 2018-11-15 鹿島建設株式会社 Method of placing fiber reinforced concrete, and boundary member

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