JPH0971902A - Overlay method using concrete pavement - Google Patents
Overlay method using concrete pavementInfo
- Publication number
- JPH0971902A JPH0971902A JP22920095A JP22920095A JPH0971902A JP H0971902 A JPH0971902 A JP H0971902A JP 22920095 A JP22920095 A JP 22920095A JP 22920095 A JP22920095 A JP 22920095A JP H0971902 A JPH0971902 A JP H0971902A
- Authority
- JP
- Japan
- Prior art keywords
- uneven
- uneven surface
- pavement
- water jet
- surface layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Road Repair (AREA)
Abstract
(57)【要約】
【課題】 オーバーレイ工法による作業時間の短縮を図
り、舗装寿命を延長する。
【解決手段】 舗装された既設の表面層１に、高圧水を
噴射するウォータジェットにより凹凸面１５を形成す
る。次に、前記凹凸表面上に小粒子を噴射するショット
ブラストにより小さな凹凸面２１を形成した後、その上
面に所定厚さのコンクリート舗装材による表面層２９を
形成する。
(57) [Abstract] [Problem] To reduce the working time by the overlay method and extend the pavement life. SOLUTION: An uneven surface 15 is formed on an existing paved surface layer 1 by a water jet which jets high pressure water. Next, a small uneven surface 21 is formed on the uneven surface by shot blasting injecting small particles, and then a surface layer 29 made of a concrete paving material having a predetermined thickness is formed on the upper surface.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、劣化した舗装表
面及び舗装層を増強するコンクリート舗装によるオーバ
ーレイ工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overlay construction method using concrete pavement for enhancing a deteriorated pavement surface and a pavement layer.
【０００２】[0002]
【従来の技術】近年、コンクリート橋の補修工法、ある
いは、滑走路等の補修工法において、スチールフィバー
レインフォースコンクリート（ＳＦＲＣ）を用いたオー
バーレイ，床版増厚工法が行なわれている。2. Description of the Related Art In recent years, as a method of repairing a concrete bridge or a method of repairing a runway, an overlay using steel fiber reinforcement concrete (SFRC) and a floor slab thickening method have been performed.
【０００３】このオーバーレイ工法は、舗装表面を所定
厚さ切削し、その切削表面に、鋼球を打ちつけるショッ
トブラストによって表面処理し、その上に新たな舗装
面，表面層を形成する手段をとっている。In this overlay method, the pavement surface is cut to a predetermined thickness, the cut surface is subjected to surface treatment by shot blasting with steel balls, and a new pavement surface and surface layer are formed on it. There is.
【０００４】[0004]
【発明が解決しようとする課題】オーバーレイ工法は、
前記した如く既存の舗装面の上に新たな表面層を舗設す
る所から、既存の舗装面と新たな表面層との間の付着力
が寿命の面で大きなウエイトを占める。このために、既
存の舗装面との付着力を高めるために、ショットブラス
トによる表面処理を行っているが、未だ十分ではなかっ
た。[Overview of the Invention] The overlay method is
As described above, since a new surface layer is laid on the existing pavement surface, the adhesive force between the existing pavement surface and the new surface layer occupies a large weight in terms of life. For this reason, in order to enhance the adhesive force with the existing pavement surface, surface treatment by shot blasting is performed, but it has not been sufficient yet.
【０００５】そこで、この発明は、作業性に優れると共
に、補修した舗装面の寿命を延ばすことができるコンク
リート舗装によるオーバーレイ工法を提供することを目
的とする。Therefore, an object of the present invention is to provide an overlay construction method using concrete pavement, which has excellent workability and can extend the life of the repaired pavement surface.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、この発明は、舗装された既設の表面層に、高圧水を
噴射するウォータジェットにより凹凸面を形成し、次
に、前記凹凸表面上に小粒子を噴射するショットブラス
トにより小さな凹凸面を形成した後、その上面に所定厚
さのコンクリート舗装材による表面層を形成する。In order to achieve the above-mentioned object, the present invention forms an uneven surface on an existing paved surface layer by a water jet for injecting high-pressure water, and then forms the uneven surface. After forming a small uneven surface by shot blasting injecting small particles on the upper surface, a surface layer made of a concrete paving material having a predetermined thickness is formed on the upper surface.
【０００７】かかるコンクリート舗装によるオーバーレ
イ工法によれば、オーバーレイされた表面層は、凹凸面
と、さらにその凹凸面の表面上に形成された小さな凹凸
面とによる表面処理によって、従来に比べて倍近い付着
力が得られるようになり、寿命の延長が図れる。また、
凹凸面は、ウォータジェットによって、表面層の強度を
損なうことなく形成できると共に、ウォータジェット及
びショットブラストの組合せにより、表面処理作業が迅
速に完了するようになる。したがって、全体の作業時間
も短くて済むようになる。According to such an overlay method using concrete pavement, the overlaid surface layer is almost twice as long as the conventional one due to the surface treatment with the uneven surface and the small uneven surface formed on the surface of the uneven surface. Adhesive force can be obtained and life can be extended. Also,
The uneven surface can be formed by the water jet without impairing the strength of the surface layer, and the combination of the water jet and the shot blasting allows the surface treatment work to be completed quickly. Therefore, the total working time can be shortened.
【０００８】[0008]
【発明の実施の形態】以下、図１乃至図９の図面を参照
しながらこの発明の具体例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A specific example of the present invention will be described below with reference to the drawings of FIGS.
【０００９】図１は各作業工程を、図２は既存の表面層
１の断面図をそれぞれ示したもので、３は舗装された既
設の表面層１に入った亀裂５や凹凸等の傷み部分７を表
面処理する第１の凹凸処理工程を示している。第１の凹
凸処理工程３で表面処理する凹凸処理手段として、この
実施形態ではウォータジェット９を用いている。ウォー
タジェット９は、水タンクを有するパワーユニット車１
１と接続し、高圧水を噴射する高圧水噴射ノズル（図示
していない）を有し、表面層１へ向けて高圧水を噴射
し、噴射した水をバキューム車１３で吸取ることで、図
３に示す如く全領域にわたって凹凸面１５が形成され
る。凹凸面１５は、既設舗装層の強度条件、劣化条件に
応じて水圧を上げたり、あるいは水量を増やすことで大
きな径の凹凸面１５が得られるようになる。特に、ウォ
ータジェット９の場合には、高圧水を噴射する所から、
舗装面の弱い部分となる亀裂５の部分や傷み部分７等は
除去され大きな凹凸面１５が作られると共に、骨材１７
の部分は避けて凹凸が作られるため、舗装強度を弱める
ことのない利点が得られる。FIG. 1 shows each work step, and FIG. 2 shows a cross-sectional view of an existing surface layer 1. Reference numeral 3 denotes a cracked portion or an uneven portion in the paved existing surface layer 1. The 1st unevenness | corrugation processing process which surface-treats 7 is shown. In this embodiment, the water jet 9 is used as the unevenness processing means for surface-treating in the first unevenness processing step 3. The water jet 9 is a power unit vehicle 1 having a water tank.
1 has a high-pressure water jet nozzle (not shown) for jetting high-pressure water, jets high-pressure water toward the surface layer 1, and sucks the jetted water with a vacuum wheel 13. As shown in FIG. 3, the uneven surface 15 is formed over the entire area. As for the uneven surface 15, the uneven surface 15 having a large diameter can be obtained by increasing the water pressure or increasing the water amount according to the strength condition and the deterioration condition of the existing pavement layer. Particularly, in the case of the water jet 9, from the place where the high pressure water is injected,
The crack 5 and the damaged portion 7 which are weak portions of the pavement surface are removed to form a large uneven surface 15 and the aggregate 17
Since the concave and convex portions are avoided to form the unevenness, the advantage that the pavement strength is not weakened can be obtained.
【００１０】１９はウォータジェット９によって形成さ
れた凹凸面１５の表面上に、さらに小さな凹凸面２１を
形成する第２の凹凸処理工程を示している。Reference numeral 19 denotes a second uneven processing step of forming a smaller uneven surface 21 on the surface of the uneven surface 15 formed by the water jet 9.
【００１１】第２の凹凸処理工程１９で使用する凹凸処
理手段として、この実施形態ではショットブラスト２３
を用いている。ショットブラスト２３は、打ちつける材
料に、粒径の小さいグリッドや鋼球等のショット材料を
用いており、凹凸面１５の上からショット材料を打ちつ
けることで、図４ａ，ｂに示す如く凹凸面１５の表面
上、あるいは、露出した骨材１７の表面上に小さな凹凸
面２１が作られるようになり、ショット材料及び研掃粉
は図示していないが吸引手段により吸引処理されるよう
になる。In this embodiment, shot blasting 23 is used as the unevenness processing means used in the second unevenness processing step 19.
Is used. The shot blasting 23 uses a shot material such as a grid or a steel ball having a small particle diameter as a material to be hit, and by hitting the shot material from above the uneven surface 15, the shot blasting of the uneven surface 15 is performed as shown in FIGS. A small uneven surface 21 is formed on the surface or on the exposed surface of the aggregate 17, and the shot material and the polishing powder are sucked by a suction means (not shown).
【００１２】２５は最終のコンクリート打設工程を示し
ており、第２の凹凸処理工程１９によって形成された凹
凸面１５，２１上にコンクリートミキサー車２７により
コンクリートを流し、図５に示す如く表面層２９を形成
するようになる。Reference numeral 25 denotes a final concrete placing step, in which concrete is poured by the concrete mixer truck 27 on the uneven surfaces 15 and 21 formed by the second uneven processing step 19, and the surface layer is formed as shown in FIG. 29 is formed.
【００１３】かかるコンクリート舗装によるオーバーレ
イ工法によれば、第１、第２の凹凸処理工程３，１９に
よって凹凸面１５の表面上に小さな凹凸面２１が作られ
るようになる。しかも、凹凸面１５，２１は、ウォータ
ジェット９とショットブラスト２３の組合せによるた
め、舗装強度を弱めることなく凹凸が作れると共に、簡
単、かつ、迅速に完了し、全体の作業時間も短くて済む
ようになる。また、凹凸面１５の表面上に小さな凹凸面
２１が作られる結果、従来に比べて倍近い付着強度が得
られるようになる。図６にその実験結果を示す。According to the overlay construction method using such concrete pavement, a small uneven surface 21 is formed on the surface of the uneven surface 15 by the first and second uneven processing steps 3 and 19. Moreover, since the uneven surfaces 15 and 21 are formed by the combination of the water jet 9 and the shot blasting 23, the uneven surface can be created without weakening the pavement strength, and the work can be completed easily and quickly, and the overall work time can be shortened. become. Further, as a result of forming the small uneven surface 21 on the surface of the uneven surface 15, it is possible to obtain the adhesion strength that is almost double that in the conventional case. The experimental results are shown in FIG.
【００１４】図６において、Ｎｏ．１，２，３は表面層
９の表面処理をショットブラストのみの工法で行なった
場合、Ｎｏ．４，５，６はウォータジェットのみの工法
で行なった場合、Ｎｏ．７，８は本発明に係るウォータ
ジェットとショットブラストとを組合せた工法で行なっ
た場合を示している。Referring to FIG. Nos. 1, 2 and 3 are Nos. 1 to 3 when the surface treatment of the surface layer 9 is performed by a method of only shot blasting. Nos. 4, 5 and 6 are Nos. When the water jet only method is used. 7 and 8 show the case where the method of combining the water jet and the shot blast according to the present invention is used.
【００１５】図６によれば、単独で行なうウォータジェ
ット又はショットブラストでは、凹凸の深さを上げても
１０〜１５ｋｇ／ｃｍ2 程度の付着強度に対して、ウォ
ータジェットとショットブラストを組合せたＮｏ．７，
８によれば、２６．８〜２７．１ｋｇ／ｃｍ2 の付着強
度が得られることがわかる。この値は、従来に比べて約
倍の値であり、非常に優れていることが理解できる。According to FIG. 6, in the case of water jet or shot blasting performed independently, even if the depth of the unevenness is increased, the adhesion strength of about 10 to 15 kg / cm 2 is obtained. ． 7,
8, it can be seen that an adhesion strength of 26.8 to 27.1 kg / cm 2 can be obtained. This value is about twice the value of the conventional value, and it can be understood that this value is extremely excellent.
【００１６】なお、図６において、Ｎｏ．７，８の付着
強度の値が逆転しているが、この付近の凹凸条件が付着
強度の限界的な位置にあるものと思われる。Incidentally, in FIG. Although the values of the adhesion strength of Nos. 7 and 8 are reversed, it is considered that the uneven condition in this vicinity is at the limit position of the adhesion strength.
【００１７】[0017]
【発明の効果】以上、説明したように、この発明によれ
ば、凹凸面の表面上に、さらに小さな凹凸面を作る表面
処理作業を、ウォータジェットとショットブラストとの
組合せにより、舗装強度を弱めることなく簡単、かつ、
迅速に完了し、全体時間が短くて済むようになる。ま
た、オーバーレイ用の舗装面の付着強度を従来に比べて
大幅にアップすることができため、舗装寿命の延長が図
れる。As described above, according to the present invention, the pavement strength is weakened by the combination of the water jet and the shot blast in the surface treatment work for forming a smaller uneven surface on the uneven surface. Easy, and
It completes quickly and takes less time overall. In addition, the adhesion strength of the pavement surface for overlay can be significantly increased compared to the conventional one, so that the pavement life can be extended.
【図１】コンクリート舗装によるオーバーレイ工法を示
した説明図。FIG. 1 is an explanatory view showing an overlay construction method using concrete pavement.
【図２】切削機により切削した切削面の説明図。FIG. 2 is an explanatory view of a cutting surface cut by a cutting machine.
【図３】第１の凹凸処理手段により切削面に凹凸面を形
成した説明図。FIG. 3 is an explanatory view in which an uneven surface is formed on a cutting surface by a first uneven processing means.
【図４】第２の凹凸処理手段により凹凸面の表面上に小
さな凹凸面を形成した説明図。FIG. 4 is an explanatory diagram in which a small uneven surface is formed on the surface of the uneven surface by a second uneven processing means.
【図５】オーバーレイした説明図。FIG. 5 is an explanatory diagram with an overlay.
【図６】付着強度の実験結果を示した説明図。FIG. 6 is an explanatory diagram showing experimental results of adhesion strength.
１ 既設の表面層 ９ ウォータジェット １５ 凹凸面 ２１ 凹凸面 ２３ ショットブラスト ２９ オーバーレイによる表面層 1 Existing surface layer 9 Water jet 15 Uneven surface 21 Uneven surface 23 Shot blast 29 Surface layer by overlay
───────────────────────────────────────────────────── フロントページの続き (72)発明者 亀田 昭一 東京都中央区日本橋本町二丁目７番１号 新東京国際空港公団内 (72)発明者 佐藤 弘道 東京都港区新橋１丁目６番５号 日本道路 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Kameda 2-7-1, Nihonbashihonmachi, Chuo-ku, Tokyo Inside the New Tokyo International Airport Public Corporation (72) Hiromichi Sato 1-6-5, Shinbashi, Minato-ku, Tokyo Nippon Road Co., Ltd.
Claims (1)
射するウォータジェットにより凹凸面を形成し、次に、
前記凹凸表面上に小粒子を噴射するショットブラストに
より小さな凹凸面を形成した後、その上面に所定厚さの
コンクリート舗装材による表面層を形成することを特徴
とするコンクリート舗装によるオーバーレイ工法。1. An uneven surface is formed on an existing paved surface layer by a water jet for injecting high-pressure water, and then,
An overlay construction method using concrete pavement, characterized in that after a small uneven surface is formed on the uneven surface by shot blasting injecting small particles, a surface layer of concrete pavement material having a predetermined thickness is formed on the upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22920095A JP2875770B2 (en) | 1995-09-06 | 1995-09-06 | Overlay method by concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22920095A JP2875770B2 (en) | 1995-09-06 | 1995-09-06 | Overlay method by concrete pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0971902A true JPH0971902A (en) | 1997-03-18 |
| JP2875770B2 JP2875770B2 (en) | 1999-03-31 |
Family
ID=16888390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22920095A Expired - Lifetime JP2875770B2 (en) | 1995-09-06 | 1995-09-06 | Overlay method by concrete pavement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2875770B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999054264A1 (en) * | 1998-04-17 | 1999-10-28 | New Tokyo International Airport Authority | Concrete for jointing and method of jointing using said concrete |
| WO1999061706A1 (en) * | 1998-05-28 | 1999-12-02 | New Tokyo International Airport Authority | Surface treatment shape evaluation system and surface treatment shape |
| JP2014194118A (en) * | 2013-03-28 | 2014-10-09 | Taisei Rotec Corp | Construction method for pavement body, and construction method for pavement structure |
| JP2021014752A (en) * | 2019-07-16 | 2021-02-12 | 太平洋セメント株式会社 | Labor-saving method for surface treatment of reinforced concrete floor slabs |
-
1995
- 1995-09-06 JP JP22920095A patent/JP2875770B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999054264A1 (en) * | 1998-04-17 | 1999-10-28 | New Tokyo International Airport Authority | Concrete for jointing and method of jointing using said concrete |
| US6357963B1 (en) | 1998-04-17 | 2002-03-19 | New Tokyo International Airport Authority | Concrete for jointing and method of jointing using said concrete |
| EP0990629A4 (en) * | 1998-04-17 | 2003-08-20 | New Tokyo Internat Airport Aut | JOINING CONCRETE AND JOINING METHOD USING SAID CONCRETE |
| WO1999061706A1 (en) * | 1998-05-28 | 1999-12-02 | New Tokyo International Airport Authority | Surface treatment shape evaluation system and surface treatment shape |
| US6230552B1 (en) | 1998-05-28 | 2001-05-15 | New Tokyo International Airport Authority | Surface treatment shape evaluation system and surface treatment shape |
| JP2014194118A (en) * | 2013-03-28 | 2014-10-09 | Taisei Rotec Corp | Construction method for pavement body, and construction method for pavement structure |
| JP2021014752A (en) * | 2019-07-16 | 2021-02-12 | 太平洋セメント株式会社 | Labor-saving method for surface treatment of reinforced concrete floor slabs |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2875770B2 (en) | 1999-03-31 |
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