JP4910200B2 - Sectional repair method for concrete structures - Google Patents

Sectional repair method for concrete structures Download PDF

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JP4910200B2
JP4910200B2 JP2009153339A JP2009153339A JP4910200B2 JP 4910200 B2 JP4910200 B2 JP 4910200B2 JP 2009153339 A JP2009153339 A JP 2009153339A JP 2009153339 A JP2009153339 A JP 2009153339A JP 4910200 B2 JP4910200 B2 JP 4910200B2
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concave portion
restoration
downward
concrete structure
air
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JP2011006983A (en
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信 成井
和彦 徳川
次男 上野
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Pacific Consultants Co Ltd
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Description

本発明は、コンクリート構造物の劣化した部分などの要修復部分をはつり取り、その部分に新たにモルタルやグラウト等の修復材を充填することによって断面を修復するコンクリート構造物の断面修復方法に関する。   The present invention relates to a method for repairing a cross section of a concrete structure, in which a repaired portion such as a deteriorated portion of a concrete structure is picked up and a new repair material such as mortar or grout is filled in the portion to repair the cross section.

近年、コンクリート構造物の中性化、塩害、アルカリ骨材反応などによってコンクリート片の剥落などの変状が発生している。このうち塩害のように塩化物イオンが鉄筋位置まで浸透して鉄筋腐食を生じさせ、それに伴うひび割れが著しい場合や、かぶり厚以上に中性化が進行し、同様の変化が生じている場合には、ひび割れ修復を行っても充分な耐力の回復は望めず、再損傷発生のリスクも大きい。   In recent years, deformations such as peeling of concrete pieces have occurred due to neutralization of concrete structures, salt damage, alkali aggregate reaction, and the like. Of these, when chloride ions permeate to the rebar position and cause corrosion of the rebar, such as salt damage, the cracks associated therewith are significant, or when neutralization has progressed beyond the cover thickness and the same change has occurred However, even after repairing cracks, sufficient yield strength cannot be restored, and the risk of re-damage is high.

このような場合には、従来、損傷、要修復部分をウォータージェットではつり取った後、断面修復する方法が一般的である。   In such a case, conventionally, a method of repairing a cross section after the damaged or repaired portion is suspended with a water jet is generally used.

この従来の断面修復方法は、コンクリートの要修復部分を除去した後の欠損断面や、既にかぶりコンクリートの剥離や剥落によって生じている欠損断面に対し、断面に合わせた形状で型枠を組み、流動性に優れたポリマーセメントモルタル等の断面修復材によって従前の断面に修復する。修復材の充填は下部に開口させた充填口から上方に向けて注人し（逆打ち工法）、上部には排気パイプが設けられる（例えば特許文献１，２）。   This conventional cross-section repair method uses a formwork that fits the cross-section of the missing cross-section after removing the part that needs to be repaired in concrete or the cross-section that has already occurred due to peeling or peeling off of the cover concrete. It is restored to the previous cross-section with a cross-section restoration material such as polymer cement mortar with excellent properties. The restoration material is filled from the filling port opened in the lower part upward (reverse driving method), and an exhaust pipe is provided in the upper part (for example, Patent Documents 1 and 2).

上述した従来の逆打ちによる断面修復方法では、型枠とはつり面とに囲まれた修復材充填空隙内に修復材を充填する際に、下方から上方向けて圧入することによって、充填される空隙内の空気を排気パイプから排出させ、排気パイプから修復材があふれ出ることによって充填完了の目安としているが、はつり面が下向きである場合には、空気溜りの発生を完全に防止することができず、修復材の充分な充填ができなかった（例えば非特許文献１，２）。   In the above-described conventional cross-section repair method by backlash, when filling the restoration material into the restoration material filling space surrounded by the mold and the suspension surface, the gap is filled by press-fitting upward from below. The air inside is exhausted from the exhaust pipe, and the restoration material overflows from the exhaust pipe, which is used as a guideline for filling.However, if the lifting surface is facing downward, it is possible to completely prevent the accumulation of air. Therefore, the restoration material could not be sufficiently filled (for example, Non-Patent Documents 1 and 2).

特開平８−３３３９００号公報JP-A-8-333900 特開２００５−６７９０３号公報JP 2005-67903 A

コンクリート構造物の補修、補強、アップグレード論文報告集第６巻２００６．１０ 「ＰＣ橋の大規模な断面修復を対象とした高流動コンクリートに関する検討」Proceedings of Repair, Reinforcement and Upgrade of Concrete Structures Vol.6, 2006.10 “Study on High Fluidity Concrete for Large-scale Sectional Repair of PC Bridge” 土木学会論文集Ｎｏ．７９８／６−６８，７５−８８，２００５．９ 「塩害劣化したＲＣ中空床版橋への吹き付けによる断面修復工法の適用」JSCE Proceedings No. 798 / 6-68, 75-88, 2005.9 "Application of cross-section repair method by spraying to RC hollow floor slab bridge deteriorated by salt damage"

本発明はこのような従来の問題に鑑み、下向きのはつり面と型枠間の修復材充填空間内に修復材を充填する際に、充填不良によって空気溜りが生じることなく、完全な修復材充填がなされ、強度の再生がより完全になされるコンクリート構造物の断面修復方法の提供を目的としてなされたものである。   In the present invention, in view of such a conventional problem, when the restoration material is filled in the restoration material filling space between the downward hanging surface and the mold, the restoration material is completely filled without causing air accumulation due to poor filling. The purpose of this is to provide a method for repairing the cross section of a concrete structure in which the strength is more completely regenerated.

上述の如き従来の問題を解決し、所期の目的を達成するための請求項１に記載の発明の特徴は、コンクリート構造物の下向き又は横向き面の要修復部分をはつり取り、該はつり取り後の修復空間に無収縮モルタル、ポリマーセメントモルタル等のモルタル若しくはグラウト材等の修復材によって修復するコンクリート構造物の断面修復方法において、 前記要修復部分のはつり取りに際し、前記はつり取り後の修復空間の下向きはつり面に、前記コンクリート構造物躯体外周面のはつり部上縁より高い位置まではつり取った下向き凹状部を形成し、前記はつり取り後の修復空間の外面を型枠若しくは吹き付けモルタルなどの外面閉鎖部材によって閉鎖するとともに、前記下向き凹状部の最高部に近づけた高さ位置に前記修復空間外に通じる減圧用通気路を連通させ、しかる後前記外面閉鎖部材とはつり面とに囲まれた修復空隙内に前記修復材を加圧注入し、前記下向き凹状部内のみに空気溜りを残した状態まで修復材を注入した後、前記減圧用通気路を通じて下向き凹状部内を減圧して該空気溜り内の空気を抜くことにより修復空隙全域に修復材を行き渡らせるようにしたことを特徴としてなるコンクリート構造物の断面修復方法。     In order to solve the above-mentioned conventional problems and achieve the intended purpose, the feature of the invention described in claim 1 is that a portion of the concrete structure that needs to be repaired is suspended on the downward or lateral surface of the concrete structure. In a method for repairing a cross section of a concrete structure that is repaired with a restorative material such as non-shrink mortar, polymer cement mortar, or grout material in the restorative space of the present invention, A downward-facing concave portion that is suspended up to a position higher than the upper edge of the suspended portion on the outer peripheral surface of the concrete structure frame is formed on the suspended surface, and the outer surface of the restoration space after the suspension is closed to the outer surface of a formwork or sprayed mortar, etc. A reduction that leads to the outside of the repair space at a height position close to the highest portion of the downward concave portion while being closed by a member Then, the restoration material is pressure-injected into the restoration gap surrounded by the outer surface closing member and the suspension surface, and the restoration material is left until an air pocket remains only in the downward concave portion. After the injection, the cross-sectional restoration of the concrete structure is characterized in that the restoration material is spread throughout the restoration gap by depressurizing the inside of the concave portion downward through the pressure reducing air passage and extracting the air in the air reservoir. Method.

請求項２に記載の発明の特徴は、請求項１の構成に加え、前記下向き凹状部の下向き面を部分的に深く窪ませた１又は複数の空気溜り形成部を形成し、該空気溜り形成部の最高部に近づけた高さ位置に前記修復空間外に通じる減圧用通気路を連通させることにある。   According to a second aspect of the present invention, in addition to the structure of the first aspect, one or a plurality of air reservoir forming portions in which the downward surface of the downward concave portion is partially deeply recessed are formed. The pressure reducing air passage communicating with the outside of the repair space is communicated at a height position close to the highest portion of the portion.

請求項３に記載の発明の特徴は、請求項１又は２の何れか１の請求項の構成に加え、前記減圧用通気路に、予め内部を減圧させた耐真空圧容器を開閉弁を介して連通させておき、前記下向き凹状部に空気溜りを残した状態まで修復材を注入した後、前記開閉弁を開くことにより下向き凹状部内を減圧することにある。   According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, a vacuum-resistant vessel whose interior is previously depressurized is provided in the depressurizing vent passage through an on-off valve. Then, after injecting the repair material to a state where an air pocket remains in the downward concave portion, the inside of the downward concave portion is decompressed by opening the on-off valve.

請求項４に記載の発明の特徴は、請求項３の構成に加え、前記真空圧容器の一部又は全部を透明材料によって内部が透視できるようにしておき、前記開閉弁を開いた後、前記真空圧容器内に修復材が流入するのを待って修復材の注入を停止させることにある。   According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, a part or the whole of the vacuum pressure vessel is made transparent by a transparent material, and after opening the on-off valve, The injection of the restoration material is stopped after waiting for the restoration material to flow into the vacuum pressure vessel.

請求項５に記載の発明の特徴は、請求項１〜４の何れか１の請求項の構成に加え、前記下向き凹状部内の、前記減圧通気路の上端より低い位置に開口させた排気路を連通させておき、該排気路開口高さまで前記修復材の注入がなされることによって該排気路から修復材が排出され始めるのを待って前記減圧用通気路を通じて下向き凹状部内の減圧を開始させることにある。   According to a fifth aspect of the present invention, in addition to the configuration of any one of the first to fourth aspects, an exhaust passage that is opened at a position lower than the upper end of the decompression air passage in the downward concave portion is provided. Communication is started, and after the restoration material is injected to the exhaust passage opening height, the restoration material starts to be discharged from the exhaust passage, and the decompression in the downward concave portion is started through the decompression air passage. It is in.

本発明においては、コンクリート構造物の下向き又は横向き面の要修復部分をはつり取り、該はつり取り後の修復空間に無収縮モルタル、ポリマーセメントモルタル等のモルタル若しくはグラウト材等の修復材によって修復するコンクリート構造物の断面修復方法において、前記要修復部分のはつり取りに際し、前記はつり取り後の修復空間の下向きはつり面に、前記コンクリート構造物躯体外周面のはつり部上縁より高い位置まではつり取った下向き凹状部を形成し、この下向き凹状部を含む修復空間に下側から補修材を圧入することによって、下向き凹状部の下向き開口部が修復材によって閉鎖され、その上が閉鎖された空間である空気溜りとなり、その内部の空気を強制排気することによって減圧状態とすることができる。この減圧状態による吸引力と、底部からの修復材の圧入によって、空気溜りが消滅される。このように、下向き凹状部を形成し、その部分を残して補修材を充填することによって、積極的に空気溜りを所定の位置に形成し、形成された空気溜り内を強制減圧（脱気）と、補修材加圧充填による加圧によって消滅させるようにしたことによって、空気溜りを残すこと無く補修部分に対する補修材の完全な充填がなされる。 In the present invention, concrete that is required to be repaired on the downward or sideways surface of the concrete structure is repaired, and the repaired space after the suspension is repaired with a restorative material such as non-shrink mortar, polymer cement mortar, or grout material. In the method of repairing the cross section of the structure, when the portion requiring repair is suspended, the downward direction of the repair space after the suspension is suspended to the suspended surface, and the concrete structure housing outer circumferential surface is suspended downward to a position higher than the upper edge of the suspended portion. By forming a concave part and press-fitting the repair material from below into the repair space including this downward concave part, the downward opening of the downward concave part is closed by the repair material, and the air is the space where the upper part is closed It becomes a pool and can be made into a pressure reduction state by forcibly exhausting the air inside. The air pocket disappears due to the suction force in this reduced pressure state and the press-fitting of the restoration material from the bottom. In this way, by forming a downward concave portion and filling the repairing material while leaving that portion, an air reservoir is actively formed at a predetermined position, and the inside of the formed air reservoir is forcibly depressurized (degassed) Then, by eliminating the pressure by the pressure filling of the repair material, the repair material is completely filled with the repair material without leaving an air pocket.

また、前記下向き凹状部の下向き面を部分的に深く窪ませた１又は複数の空気溜り形成部を形成することによって、下向き凹部内に積極的に形成される空気溜りをより小さいものとすることができ、空気溜りを消滅させるために使用する減圧手段が規模の小さいものでよくなり、装置が簡略化できる。   In addition, by forming one or a plurality of air reservoir forming portions in which the downward surface of the downward concave portion is partially deeply recessed, an air reservoir positively formed in the downward recess is made smaller. The pressure reducing means used for eliminating the air pocket can be small, and the apparatus can be simplified.

更に、前記減圧用通気路に、予め内部を減圧させた耐真空圧容器を開閉弁を介して連通させておき、前記下向き凹状部に空気溜りを残した状態まで修復材を注入した後、前記開閉弁を開くことにより下向き凹状部内を減圧するようにすることにより、比較的軽量で小径の真空容器を、工場で減圧した状態で現場に搬入することができ、減圧ポンプなどの減圧装置を現場に搬入する必要が無いため、作業が簡略化できる。   Further, the vacuum-resistant container whose pressure is reduced in advance is communicated with the decompression vent passage through an on-off valve, and after injecting the repair material to a state in which an air pocket remains in the downward concave portion, By opening the open / close valve to reduce the pressure in the downward concave part, it is possible to carry a relatively light and small-diameter vacuum vessel to the site under reduced pressure at the factory. Since there is no need to carry it in, work can be simplified.

また、前記真空圧容器の一部又は全部を透明材料によって内部が透視できるようにしておき、前記開閉弁を開いた後、前記真空圧容器内に修復材が流入するのを待って修復材の注入を停止させることにより、空気溜りの消滅を早期に判断することができ、真空容器内の減圧状態を残した状態で、再減圧や再利用ができるため、エネルギーの消費を抑えることができる。   Further, a part or the whole of the vacuum pressure vessel is made transparent with a transparent material, and after opening the on-off valve, waiting for the restoration material to flow into the vacuum pressure vessel, By stopping the injection, it is possible to determine the disappearance of the air reservoir at an early stage, and it is possible to re-depressurize and reuse in a state where the decompressed state in the vacuum container remains, so that energy consumption can be suppressed.

更に、前記下向き凹状部内の、前記減圧通気路の上端より低い位置に開口させた排気路を連通させておき、該排気路開口高さまで前記修復材の注入がなされることによって該排気路から修復材が排出され始めるのを待って前記減圧用通気路を通じて下向き凹状部内の減圧を開始させることにより、作業の切り換え時を的確に判断でき、作業効率が良く、エネルギーの無駄な消費を抑えることができる。   Further, an exhaust passage opened at a position lower than the upper end of the decompression air passage in the downward concave portion is communicated, and the restoration material is injected up to the height of the exhaust passage opening, thereby repairing from the exhaust passage. By waiting for the material to begin to be discharged and starting the pressure reduction in the downward concave portion through the pressure reducing air passage, it is possible to accurately determine when the work is switched, improving work efficiency and suppressing wasteful consumption of energy. it can.

本発明方法をコンクリート構造物下面の修復に実施した一例を示す断面図である。It is sectional drawing which shows an example which implemented the method of this invention for the restoration of the concrete structure lower surface. 図１中のＡ-Ａ線断面図である。It is the sectional view on the AA line in FIG. 図１に示す実施例における下向き凹状部に空気溜りが形成されるまで修復材を注入した状態の断面図である。It is sectional drawing of the state which inject | poured the repair material until the air pocket is formed in the downward concave part in the Example shown in FIG. 図１に示す実施例における空気溜り形成部に空気溜りが形成された状態の断面図である。It is sectional drawing of the state in which the air pocket was formed in the air pocket formation part in the Example shown in FIG. 図４に示す空気溜りが消滅した状態の断面図である。FIG. 5 is a cross-sectional view showing a state where the air pocket shown in FIG. 4 has disappeared. 図１に示す実施例における減圧手段を違えた例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the example which changed the pressure reduction means in the Example shown in FIG. 本発明方法をコンクリート構造物側面の修復に実施した一例を示す断面図である。It is sectional drawing which shows an example which implemented the method of this invention for the restoration of the concrete structure side surface. 本発明方法を箱桁コーナーのシース埋設部分の修復に実施した一例を示す断面図である。It is sectional drawing which shows an example which implemented the method of this invention for the repair of the sheath embedding part of a box girder corner. 図８中のＢ‐Ｂ線断面図である。It is the BB sectional view taken on the line in FIG.

本発明の実施の形態を、実施例の図面に基づいて説明する。   Embodiments of the present invention will be described with reference to the drawings of the embodiments.

図１〜図６について、コンクリート構造物の下向き面の断面修復について説明する。   The cross-sectional restoration of the downward surface of the concrete structure will be described with reference to FIGS.

図１、図２に示すごとき形状にコンクリート構造物躯体１下面のはつり取り作業を行う。はつり取りは、中性化、塩害、アルカリ骨材反応などによってコンクリート片の剥落などの変状が発生し、修復を要する部分に対して行うものであり、ウォータージェットによる他、電動ピックや空気圧式のブレーカー（削岩機）等が使用できる。   The bottom surface of the concrete structure housing 1 is lifted into the shape shown in FIGS. 1 and 2. The lashing is performed on the parts that need to be repaired due to deformation such as peeling of concrete pieces due to neutralization, salt damage, alkali aggregate reaction, etc. In addition to water jets, electric picks and pneumatic type Breakers (rock drills) can be used.

このはつり取り作業に際し、はつりによって形成される下向きはつり面２に、コンクリート構造物躯体１外周面のはつり部上縁２ａより高い位置まではつり取った下向き凹状部３を形成する。この下向き凹状部３の形成に際し、該下向き凹状部の下向き面を部分的に深く窪ませた１又は複数の空気溜り形成部３ａを形成する。この下向き凹状部３の形成は後述する修復材の充填に際し、積極的に空気溜りができるようにするためのものであり、空気溜り形成部３ａの形成は、補修材充填後に残る空気溜りをより小さなものとするためである。 In this suspending operation, a downward concave portion 3 formed by suspending is formed on the suspending surface 2 formed by suspending up to a position higher than the suspending portion upper edge 2a of the outer peripheral surface of the concrete structure housing 1. In forming the downward concave portion 3, one or a plurality of air reservoir forming portions 3a are formed by partially denting the downward surface of the downward concave portion. The formation of the downward concave portion 3 is intended to make it possible to actively retain air when filling a repair material, which will be described later. This is to make it small.

このようにしてはつり作業を行った後、必要に応じて鉄筋の修復やアンカーの設置（図示せず）等の作業を行った後、はつり空間、即ち修復材を充填する修復空間４の外側を覆う外面閉鎖部材である型枠５を組み立てる。   After carrying out the hanging work in this way, after carrying out work such as repairing the reinforcing bars and installing anchors (not shown) as necessary, the outside of the hanging space, that is, the restoration space 4 filled with the restoration material, The form 5 which is an outer surface closing member to cover is assembled.

型枠５の組み立てに際し、図１に示すように、型枠底面に修復材充填パイプ６を連通させるとともに型枠に排気兼用のパイロットドレーン路７を連通させる。この排気兼用パイロットドレーン路７の先端は、凹状部３内部に開口させ、充填材を注入した際に型枠内の排気とともに、修復材の充填高さ検出の役目をもたせる。   In assembling the mold 5, as shown in FIG. 1, the restoration material filling pipe 6 is communicated with the bottom of the mold and the exhaust drain pilot drain path 7 is communicated with the mold. The front end of the exhaust / pilot drain path 7 is opened inside the concave portion 3 and, when the filler is injected, serves to detect the filling height of the restoration material together with the exhaust in the mold.

更に、これらのパイプの設置と同時に、前記空気溜り形成部３ａの最奥部に耐圧製のパイプからなる減圧用通気路１０の先端を連通開口させる。この減圧用通気路１０の他端は、修復空間４外に導出し、その端部を減圧手段に連通させ、必要なときに凹状部３内を減圧できるようにする。   Further, simultaneously with the installation of these pipes, the tip of the decompression air passage 10 made of a pressure-resistant pipe is opened to communicate with the innermost part of the air reservoir forming portion 3a. The other end of the pressure reducing air passage 10 is led out of the repair space 4, and the end is communicated with the pressure reducing means so that the inside of the concave portion 3 can be decompressed when necessary.

減圧手段としては、図１に示すように減圧タンク１１とその内部の減圧する真空ポンプ１２が使用できる。減圧タンク１１には開閉弁１４を介して前記減圧用通気路１０が連通されている。減圧タンク１１は一部又は全部を透明な容器をもって構成されている。   As the decompression means, as shown in FIG. 1, a decompression tank 11 and a vacuum pump 12 for decompressing the interior can be used. The depressurizing tank 11 communicates with the depressurizing vent passage 10 through an on-off valve 14. The decompression tank 11 is partially or entirely configured with a transparent container.

次いで、修復空間４内への修復材の充填作業を行う。修復材としては、流動性のある無収縮モルタルやグラウト材が使用できる。この充填作業に際しては、図３に示すように、初めは減圧用通気路１０からの減圧を行わないで修復材充填パイプ６を通じて加圧注入ポンプ１５より修復空間４内にその底部から修復材ａを加圧注入する。   Next, the restoration work 4 is filled with the restoration material. As the restoration material, fluid non-shrinkable mortar or grout material can be used. At the time of this filling operation, as shown in FIG. 3, the restoration material a is first introduced into the restoration space 4 from the pressurized injection pump 15 through the restoration material filling pipe 6 through the restoration material filling pipe 6 without reducing the pressure from the decompression air passage 10. Is injected under pressure.

修復材の加圧注入に伴って修復空間４内の空気は排気兼用のパイロットドレーン路７より排出され、充填された修復材ａの上面が所定の高さに達すると図４に示すように排気兼用のパイロットドレーン路７から修復材が漏れ出ることとなり、これによって補修材が凹状部３の下向き開口部を閉鎖し、凹状部３内に空気溜りｂが形成された状態となったことを判別できるとともに、空気溜り形成部３ａのみに空気溜りｂが形成されることとなる。   As the restoration material is pressurized and injected, the air in the restoration space 4 is discharged from the pilot drain passage 7 serving as an exhaust gas. When the upper surface of the filled restoration material a reaches a predetermined height, the air is exhausted as shown in FIG. The restoration material leaks out from the dual-purpose pilot drain path 7, and this determines that the repair material has closed the downward opening of the concave portion 3 and the air reservoir b is formed in the concave portion 3. In addition, the air reservoir b is formed only in the air reservoir forming portion 3a.

次いで、修復材充填パイプ６からの加圧充填を継続させつつ、減圧通気路１０の開閉弁１４を開き、減圧手段によって凹状部３内を減圧させる。これによって閉鎖空間となっている空気溜りｂ内の空気が抜かれ、修復材ａが押し上げられて凹状部３内全域が埋められる。   Next, while the pressure filling from the restoration material filling pipe 6 is continued, the on-off valve 14 of the decompression air passage 10 is opened, and the inside of the concave portion 3 is decompressed by the decompression means. As a result, the air in the air reservoir b, which is a closed space, is extracted, and the restoration material a is pushed up to fill the entire area of the concave portion 3.

このようにして凹状部３内の最奥部まで補修材が充填されると、図５に示すように減圧通気路１０から修復材が吸い出され、これが内部が透視できる減圧タンク１１内に吐出されることによって、凹状部３内が完全に修復材によって満たされ、空気溜りｂが消滅したことが判別できる。   When the repair material is filled to the innermost part in the concave portion 3 in this way, the repair material is sucked out from the decompression air passage 10 as shown in FIG. 5 and discharged into the decompression tank 11 through which the inside can be seen through. By doing so, it can be determined that the concave portion 3 is completely filled with the restoration material, and the air pocket b has disappeared.

尚、前述した空気溜り形成部３ａは必ずしも必要ではなく、図３に示すように下向き凹状部３の下向きの開口部分が修復材ａによって閉鎖され、下向き凹状部３が空気溜りとなった状態で減圧用通気路１０からの減圧を開始しても良い。この場合排気兼用パイロットドレーン路７は必ずしも必要ではない。   Note that the air reservoir forming portion 3a described above is not necessarily required, and the downward opening portion of the downward concave portion 3 is closed by the restoration material a as shown in FIG. 3, and the downward concave portion 3 becomes an air reservoir. The pressure reduction from the pressure reducing air passage 10 may be started. In this case, the exhaust / pilot drain path 7 is not necessarily required.

この実施例では、減圧手段として減圧タンク１１と真空ポンプ１２を使用しているが、この他、図６に示すように、予め内部を減圧させた耐真空圧容器１７を開閉弁１６を介して減圧用通気路１０に連通されるようにしてもよい。この場合、耐真空圧容器１７の一部又は全部を透明な材料によって形成し、内部が透視できるものを使用する。   In this embodiment, the decompression tank 11 and the vacuum pump 12 are used as decompression means. In addition, as shown in FIG. 6, a vacuum-resistant container 17 whose interior has been decompressed in advance is connected via an on-off valve 16. You may make it connect with the ventilation path 10 for pressure reduction. In this case, a part or the whole of the vacuum pressure resistant container 17 is made of a transparent material and the inside can be seen through.

これによって、凹状部の下向き開口部が修復材によって閉鎖された後に、開閉弁１６を開くことによって凹状部３の内空気を吸引させて修復材の充填を促進させるとともに、空気溜り消失を、修復材の容器１７内への吐出を視認することによって判断することができる。   As a result, after the downward opening of the concave portion is closed by the restoration material, the on-off valve 16 is opened to suck the air in the concave portion 3 to facilitate the filling of the restoration material, and to repair the disappearance of the air pocket. This can be determined by visually checking the discharge of the material into the container 17.

上述した実施例では、コンクリート構造物の下側面全域の補修の場合について述べたが、コンクリート構造物の側面などの鉛直面の補修に際しては、コンクリート構造物躯体１の側面の要修復部分を図７に示すように、横向きにはつって修復空間４を形成するとともに、はつりによって形成される下向きはつり面２に、コンクリート構造物躯体１外周面のはつり部上縁２ａより高い位置まではつり取った下向き凹状部３及びその一部又は複数個所に前述と同様の空気溜り形成部３ａを形成する。   In the above-described embodiment, the case of repairing the entire lower surface of the concrete structure has been described. However, when repairing a vertical surface such as the side surface of the concrete structure, the repaired portion of the side surface of the concrete structure frame 1 is shown in FIG. As shown in Fig. 2, the restoration space 4 is formed in the horizontal direction, and the downward direction formed by the suspension is directed to the suspended surface 2, and the concrete structure housing 1 outer peripheral surface is suspended downward to a position higher than the suspended portion upper edge 2a. An air reservoir forming portion 3a similar to that described above is formed in the concave portion 3 and a part or a plurality thereof.

このようにして修復空間４を形成した後、その開口部を型枠５によって閉鎖するとともに、その型枠５を貫通させて修復空間４の下側に修復材充填パイプ６を、上側に排気パイプ７を連通させるとともに、空気溜り形成部３ａの最奥部に前述と同様に減圧用通気路１０の先端を開口させる。修復材の充填は前述と同様の手順によって行う。   After the repair space 4 is formed in this way, the opening is closed by the mold 5, and the repair material filling pipe 6 is passed through the mold 5 below the repair space 4, and the exhaust pipe is placed above the repair space 4. 7 is communicated, and the tip of the pressure reducing air passage 10 is opened at the innermost part of the air reservoir forming portion 3a in the same manner as described above. The restoration material is filled in the same procedure as described above.

また、図８、図９に示すように、ＰＣ緊張材を挿通したシース２０が多数埋設されている箱桁コーナー部２１において、そのシース２０より深い部分を修復する際には、同図に示すように箱桁底面よりウォータージェットによってシースをよけ、その上の要修復部分をはつり取ることによって、下向き凹部３を形成するとともに、その一部又は複数個所に前述と同様の空気溜り形成部３ａを形成する。   Further, as shown in FIGS. 8 and 9, when repairing a deeper portion than the sheath 20 in the box girder corner portion 21 in which a large number of the sheaths 20 through which the PC tendon is inserted are embedded, it is shown in FIG. As described above, the sheath is removed from the bottom of the box girder by a water jet, and the portion to be repaired is suspended to form a downwardly recessed portion 3, and the air reservoir forming portion 3a similar to the above is formed at a part or a plurality of portions thereof. Form.

次いで、この空気溜り形成部３ａの最奥部に前述と同様に減圧用通気路１０を連通させるとともに、空気溜り形成部３ａより低い位置の下向き凹部３内に排気パイプ７を連通させる。しかる後、最も外側のシース２０間及びそれより下側の下向き凹部３の開口部を閉鎖するように複数の吹き付けモルタル層２２による外面閉鎖部材によって閉鎖させる。この吹き付けモルタル層２２に貫通させて修復材充填パイプ６を設置する。修復材の充填は前述と同様の手段によって行う。   Next, the pressure reducing air passage 10 is communicated with the innermost part of the air reservoir forming portion 3a in the same manner as described above, and the exhaust pipe 7 is communicated with the downward recessed portion 3 at a position lower than the air reservoir forming portion 3a. Then, it is closed by an outer surface closing member formed by a plurality of sprayed mortar layers 22 so as to close the openings of the downward concave portions 3 between the outermost sheaths 20 and the lower side thereof. The restoration material filling pipe 6 is installed through the sprayed mortar layer 22. The restoration material is filled by the same means as described above.

近年、コンクリート構造物の中性化、塩害、アルカリ骨材反応などによってコンクリート片の剥落などの変状が発生している。このうち塩害のように塩化物イオンが鉄筋位置まで浸透して鉄筋腐食を生じさせ、それに伴うひび割れが著しい場合や、かぶり厚以上に中性化が進行しており、特にクンクリート橋梁や高架道路のコンクリート桁は、安全上の観点から早期に補修が必要な箇所が多発している。かかる状況下において本発明は極めて有用である。   In recent years, deformations such as peeling of concrete pieces have occurred due to neutralization of concrete structures, salt damage, alkali aggregate reaction, and the like. Of these, chloride ions permeate to the position of the reinforcing bars, such as salt damage, and corrosion of the reinforcing bars occurs, and the accompanying cracks are significant, or neutralization has progressed more than the cover thickness, especially Kunkreet bridges and elevated roads. The concrete girder has a number of places that need to be repaired at an early stage from the viewpoint of safety. Under such circumstances, the present invention is extremely useful.

ａ 修復材
ｂ 空気溜り
１ コンクリート構造物躯体
２ 下向きはつり面
２ａ はつり部上縁
３ 下向き凹状部
３ａ 空気溜り形成部
４ 修復空間
５ 型枠（外面閉鎖部材）
６ 修復材充填パイプ
７ 排気兼用のパイロットドレーン路
１０ 減圧用通気路
１１ 減圧タンク
１２ 真空ポンプ
１４，１６ 開閉弁
１５ 加圧注入ポンプ
１７ 耐真空圧容器
２０ シース
２１ 箱桁コーナー部
２２ 吹き付けモルタル層 a Restoration material b Air reservoir 1 Concrete structure housing 2 Downward suspension surface 2a Upper edge of suspension portion 3 Downward concave portion 3a Air retention formation portion 4 Repair space 5 Formwork (outer surface closing member)
6 Restoration Material Filling Pipe 7 Pilot Drain Passage for Exhaust 10 Pressure Reduction Passage 11 Pressure Reduction Tank 12 Vacuum Pump 14, 16 On-off Valve 15 Pressure Injection Pump 17 Vacuum Resistant Container 20 Sheath 21 Box Girder Corner 22 Spraying Mortar Layer

Claims (5)

コンクリート構造物の下向き又は横向き面の要修復部分をはつり取り、該はつり取り後の修復空間に無収縮モルタル、ポリマーセメントモルタル等の無収縮モルタル、ポリマーセメントモルタル等のモルタル若しくはグラウト材等の修復材によって修復するコンクリート構造物の断面修復方法において、
前記要修復部分のはつり取りに際し、前記はつり取り後の修復空間の下向きはつり面に、前記コンクリート構造物躯体外周面のはつり部上縁より高い位置まではつり取った下向き凹状部を形成し、
前記はつり取り後の修復空間の外面を型枠若しくは吹き付けモルタルなどの外面閉鎖部材によって閉鎖するとともに、前記下向き凹状部の最高部に近づけた高さ位置に前記修復空間外に通じる減圧用通気路を連通させ、
しかる後前記外面閉鎖部材とはつり面とに囲まれた修復空隙内に前記修復材を加圧注入し、
前記下向き凹状部内のみに空気溜りを残した状態まで修復材を注入した後、前記減圧用通気路を通じて下向き凹状部内を減圧して該空気溜り内の空気を抜くことにより修復空隙全域に修復材を行き渡らせるようにしたことを特徴としてなるコンクリート構造物の断面修復方法。 Restoring the repair required part of the downward or lateral surface of the concrete structure and repairing the non-shrink mortar, non-shrink mortar such as polymer cement mortar, mortar such as polymer cement mortar or grout material in the repair space after the suspension In the method of repairing the cross section of a concrete structure to be repaired by
At the time of removing the repaired portion, a downward concave portion is formed on the suspended surface of the repaired space after the removal, and a downwardly recessed portion is suspended to a position higher than the upper edge of the suspended portion of the outer peripheral surface of the concrete structure housing.
The restoration space after the suspension is closed by an outer surface closing member such as a mold or sprayed mortar, and a decompression air passage leading to the outside of the restoration space at a height position close to the highest portion of the downward concave portion Communicate
Thereafter, the restoration material is pressurized and injected into a restoration gap surrounded by the outer surface closing member and the suspension surface,
After injecting the repair material to a state in which the air pocket remains only in the downward concave portion, the decompression portion is decompressed through the pressure reducing air passage, and the air in the air reservoir is discharged to restore the repair material over the entire repair gap. A method for repairing a cross section of a concrete structure, characterized by being spread. 前記下向き凹状部の下向き面を部分的に深く窪ませた１又は複数の空気溜り形成部を形成し、該空気溜り形成部の最高部に近づけた高さ位置に前記修復空間外に通じる減圧用通気路を連通させる請求項１に記載のコンクリート構造物断面修復方法。   One or a plurality of air reservoir forming portions in which the downward surface of the downward concave portion is partially deeply recessed, and the pressure reducing pressure leads to the outside of the repair space at a height close to the highest portion of the air reservoir forming portion. The method for repairing a cross section of a concrete structure according to claim 1, wherein the air passage is communicated. 前記減圧用通気路に、予め内部を減圧させた耐真空圧容器を開閉弁を介して連通させておき、前記下向き凹状部に空気溜りを残した状態まで修復材を注入した後、前記開閉弁を開くことにより下向き凹状部内を減圧する請求項１又は２の何れかに記載のコンクリート構造物の断面修復方法。 A vacuum-resistant vessel whose interior has been decompressed in advance is communicated with the decompression air passage through an on-off valve, and after the restoration material is injected to a state in which an air pocket remains in the downward-facing concave portion, the on-off valve The method of repairing a cross section of a concrete structure according to claim 1 or 2, wherein the inside of the downwardly concave portion is decompressed by opening. 前記真空圧容器の一部又は全部を透明材料によって内部が透視できるようにしておき、前記開閉弁を開いた後、前記真空圧容器内に修復材が流入するのを待って修復材の注入を停止させる請求項３に記載のコンクリート構造物の断面修復方法。   A part or all of the vacuum pressure vessel is made transparent with a transparent material, and after opening the on-off valve, the restoration material is injected after waiting for the restoration material to flow into the vacuum pressure vessel. The method for repairing a cross section of a concrete structure according to claim 3, wherein the method is stopped. 前記下向き凹状部内の、前記減圧通気路の上端より低い位置に開口させた排気路を連通させておき、該排気路開口高さまで前記修復材の注入がなされることによって該排気路から修復材が排出され始めるのを待って前記減圧用通気路を通じて下向き凹状部内の減圧を開始させる請求項１〜３又は４の何れかに記載のコンクリート構造物の断面修復方法。   An exhaust passage opened at a position lower than the upper end of the decompression air passage in the downward concave portion is communicated, and the restoration material is injected from the exhaust passage to the height of the exhaust passage opening, so that the restoration material is removed from the exhaust passage. The method for repairing a cross section of a concrete structure according to any one of claims 1 to 3, wherein the pressure reduction in the downward concave portion is started through the pressure reducing air passage after waiting to start being discharged.
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Cited By (1)

* Cited by examiner, † Cited by third party
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US8999504B2 (en) 2012-10-02 2015-04-07 Shin-Etsu Chemical Co., Ltd. Waterproof sheet for use in bridge pier repair and waterproof working method using the same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101268843B1 (en) 2011-01-25 2013-05-29 한국건설기술연구원 Charging method for infill material using planar end panel
JP5885106B2 (en) * 2012-06-15 2016-03-15 株式会社ピーエス三菱 Anchor member fixing method for existing concrete structure
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JP6387124B2 (en) * 2017-01-13 2018-09-05 株式会社エステック Installation method of electrodes for cathodic protection
JP7367953B2 (en) * 2018-09-07 2023-10-24 株式会社アレン Repair formwork for slab type track and filling layer repair method for slab type track using the same
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CN114211595B (en) * 2021-12-07 2023-06-27 上海二十冶建设有限公司 Rapid repair die for concrete prefabricated part unfilled edges and corner falling and use method thereof
CN114293810A (en) * 2022-02-23 2022-04-08 李荣路 Method for reinforcing stone micro-pressure concrete filled structure
CN115025933B (en) * 2022-06-21 2023-09-29 中国工程物理研究院化工材料研究所 Brittle material damage bridging repair method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53101807A (en) * 1977-02-18 1978-09-05 Ito Yasuro Method of placing concrete pile
JPS598877A (en) * 1982-07-07 1984-01-18 岡　正孝 Reinjection of epoxy resin for certainly constructing cement mortar injection at time of repairing of concrete floor panel or beam
JPS6278360A (en) * 1985-09-30 1987-04-10 日本セメント株式会社 Repairing of concrete structure
JPS6424964A (en) * 1987-07-21 1989-01-26 P S Concrete Method of repair construction of concrete structure
JPH03235876A (en) * 1990-02-09 1991-10-21 Takenaka Komuten Co Ltd Cavity repairing method for concrete filled steel pipe
JPH0694729B2 (en) * 1990-06-18 1994-11-24 章 松永 Method and system for repairing cracks in concrete structures
JPH08260716A (en) * 1995-03-20 1996-10-08 Minoru Sugisawa Repairing method for corroded concrete
JP4433490B2 (en) * 2003-08-21 2010-03-17 財団法人鉄道総合技術研究所 Repair materials for salt damage countermeasures and repair methods for structures
JP4982666B2 (en) * 2007-05-21 2012-07-25 信 成井 Method of injecting grout into sheath for inserting PC tendon in PC structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8999504B2 (en) 2012-10-02 2015-04-07 Shin-Etsu Chemical Co., Ltd. Waterproof sheet for use in bridge pier repair and waterproof working method using the same
US9758935B2 (en) 2012-10-02 2017-09-12 Shin-Etsu Chemical Co., Ltd. Waterproof sheet for use in bridge pier repair and waterproof working method using the same

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