JPH1193139A - Joint material for caisson and its manufacture - Google Patents
Joint material for caisson and its manufactureInfo
- Publication number
- JPH1193139A JPH1193139A JP25376897A JP25376897A JPH1193139A JP H1193139 A JPH1193139 A JP H1193139A JP 25376897 A JP25376897 A JP 25376897A JP 25376897 A JP25376897 A JP 25376897A JP H1193139 A JPH1193139 A JP H1193139A
- Authority
- JP
- Japan
- Prior art keywords
- joint material
- caisson
- thin
- vulcanization
- rubber sheet
- 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.)
- Pending
Links
Landscapes
- Revetment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、設置されたケーソ
ンの継ぎ目をシールするためのケーソン用目地材および
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material for caisson for sealing a seam of an installed caisson and a method of manufacturing the joint material.
【０００２】[0002]
【従来の技術】従来から、海岸の埋立てや護岸工事等を
行なうにあたり、図６に示すように、海底に敷設した基
礎割石（20）の上にケーソン（21）を並べて設置し、そ
の内部に中込砂（22）を充填して上部開口をコンクリー
ト（23）で封口すると共に、その背後空間に裏込め石や
土砂等の裏込材（24）を投入する工法が広く用いられて
いる。このような工法においては、ケーソン（21）は一
定の間隔（10〜20cm程度）で一列に配置され、隣接する
ケーソン間の継ぎ目には、裏込材が流出しないように継
ぎ目をシールするゴム製の目地材がケーソンの高さ方向
に配置されている（特開平7 ‐292681号公報、特開昭62
‐121236号公報等参照）。2. Description of the Related Art Conventionally, when performing reclamation or revetment work on a coast, as shown in FIG. 6, caisson (21) is arranged side by side on a foundation split stone (20) laid on the sea floor, and the inside thereof is installed. A method is widely used in which a sandbag (22) is filled into a container, the upper opening is closed with concrete (23), and a backing material (24) such as backfilling stone or earth and sand is poured into the space behind the opening. In such a construction method, the caisson (21) is arranged in a line at a fixed interval (about 10 to 20 cm), and a rubber seal is used to seal the joint between adjacent caissons so that the backing material does not flow out. Are arranged in the height direction of the caisson (Japanese Patent Application Laid-Open No. 7-292681,
-121236, etc.).
【０００３】ところで、ケーソン間の目地間隔は、施工
後のケーソンの沈下や波浪等によって変動する場合があ
る。従って、目地材は、目地間隔の変化に追従できるも
のでなければならない。この点に鑑みて従来では、図７
に示すように断面Ｌ字型の目地材（25）や図８に示すよ
うに断面Ｕ字型の部分を持つ目地材（25）が使用されて
いるが、その中でも特にＵ字型のものは目地間隔の変化
が大きいと予想される場合に広く用いられている。[0003] Incidentally, the joint spacing between caisson may fluctuate due to sinking of the caisson after construction, waves, or the like. Therefore, the joint material must be able to follow changes in joint spacing. In view of this point, conventionally, FIG.
As shown in FIG. 8, a joint material (25) having an L-shaped cross section and a joint material (25) having a U-shaped section as shown in FIG. 8 are used. It is widely used when the change in joint interval is expected to be large.
【０００４】[0004]
【発明が解決しようとする課題】上記Ｕ字型の目地材
は、予想される目地間隔の変位の大きさにより、その仕
様が選定される。そして、選定した仕様に合わせて個別
に金型を製作し、ゴム材を成形加硫することによって目
地材が製作される。The specifications of the U-shaped joint material are selected according to the expected displacement of joint space. Then, individual molds are manufactured according to the selected specification, and the joint material is manufactured by molding and vulcanizing a rubber material.
【０００５】このように、従来では仕様に合った金型を
その都度設計、製作しなければならないため、金型コス
トがかかり、そのために施工コストの高騰を招いてい
た。[0005] As described above, conventionally, a mold that meets specifications must be designed and manufactured each time, so that the cost of the mold is increased, and the construction cost is increased.
【０００６】そこで、本発明はケーソン用目地材の製作
コストを低減させることを目的とする。Therefore, an object of the present invention is to reduce the manufacturing cost of a caisson joint material.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成すべく、
本発明にかかるケーソン用目地材は、１次加硫にて所望
の厚みを有する板状断面の少なくとも１箇所に当該厚み
よりも薄い薄肉部を持つように製作されたゴムシート
を、２次加硫にてその薄肉部を円弧状に曲げて成形した
ものである。In order to achieve the above object,
The joint material for caisson according to the present invention is a secondary vulcanizing method in which a rubber sheet manufactured so as to have a thin portion thinner than at least one portion of a plate-shaped cross section having a desired thickness by primary vulcanization is used. The thin part is bent into an arc shape with sulfur and molded.
【０００８】この場合、薄肉部の幅は、２次加硫後の円
弧部分の孤長と等しくするのが望ましい。In this case, it is desirable that the width of the thin portion is equal to the arc length of the arc portion after the secondary vulcanization.
【０００９】このケーソン用目地材は、１次加硫により
ゴムシートを作成し、これを断面Ｕ字型の部分を持つよ
うに折り曲げた状態で２次加硫することによって製造す
ることができる。The joint material for caisson can be manufactured by preparing a rubber sheet by primary vulcanization and then secondary vulcanizing the rubber sheet in a state of being bent so as to have a U-shaped section.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態を図１乃
至図５に基いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１１】図１及び図２に本発明にかかるケーソン用
目地材の製造工程を示す。この製造工程は、図１に示す
ように、先ず１次加硫にてゴムシート（１）を作成する
ことから始まる。ここで、１次加硫とは、最終加硫を予
定してゴム組成物をある程度加硫することにより、取り
扱い、保管等に便利な物性を持たせ、後の加硫で完成品
にするための予備加硫をいう。FIGS. 1 and 2 show a manufacturing process of a joint material for caisson according to the present invention. This manufacturing process starts with first producing a rubber sheet (1) by primary vulcanization as shown in FIG. Here, the primary vulcanization means that the rubber composition is vulcanized to some extent in preparation for the final vulcanization, to provide physical properties convenient for handling, storage, etc., and to obtain a finished product by later vulcanization. Prevulcanization.
【００１２】ゴムシート（１）は、断面矩形状をなす４
つの厚肉部（２）の間の３箇所に、これよりも薄く形成
された薄肉部（3a）（3b）を有するもので、厚肉部
（２）および薄肉部（3a）（3b）はそれぞれケーソンの
高さ方向( 図１の矢印方向) に沿って互いに平行に形成
されている。３つの薄肉部（3a）（3b）のうち、両端の
薄肉部（3a）は等しい幅（Ｌ１）に形成され、この幅
（Ｌ１）は後述する２次加硫後の目地材（７：図２参
照）におけるシール本体部（５）と固定部（６）との間
の円弧部の長さと等しくされる（Ｌ１＝πｒ1 ／２）。
同様に中央の薄肉部（3b）の幅（Ｌ２）は、目地材
（７）のＵ字型部分の円弧（5a）の長さと等しくされる
（Ｌ２＝πｒ2 ）。The rubber sheet (1) has a rectangular cross section.
Three thin portions (3a) and (3b) formed thinner at three places between the two thick portions (2), and the thick portion (2) and the thin portions (3a) (3b) Each is formed parallel to each other along the height direction of the caisson (the direction of the arrow in FIG. 1). Of the three thin portions (3a) and (3b), the thin portions (3a) at both ends are formed to have the same width (L1), and the width (L1) is the joint material after secondary vulcanization described later (7: FIG. the seal body portion in the second reference) (5) is equal to the length of the arcuate portion between the fixed part (6) and (L1 = πr 1/2) .
Similarly, the width (L2) of the central thin portion (3b) is made equal to the length of the arc (5a) of the U-shaped portion of the joint material (7) (L2 = πr 2 ).
【００１３】なお、上記工程においては、ケーソン背後
に投入される裏込材の土圧に耐えられるよう、必要に応
じてナイロン繊維等からなる布状の補強材（４）をシー
ト（１）中に介在させておくのが好ましい。In the above-mentioned step, a cloth-like reinforcing material (4) made of nylon fiber or the like is optionally added to the sheet (1) so as to withstand the earth pressure of the backing material inserted behind the caisson. It is preferable to intervene.
【００１４】次に２次加硫にてゴムシート（１）を最終
形態に成形する。すなわち、中央の薄肉部（3b）を１８
０°反転するように円弧状に成形すると共に、両端の薄
肉部（3a）を外側に広がるように９０°円弧状に屈曲さ
せる。これにより、中央部に断面Ｕ字型のシール本体部
（５）を有し、且つその両端に外側に延びる平板状の固
定部（６）を有する目地材（７）が得られる。Next, the rubber sheet (1) is formed into a final form by secondary vulcanization. That is, the central thin part (3b) is 18
It is formed into an arc so as to be inverted by 0 °, and is bent into a 90 ° arc so that the thin portions (3a) at both ends are spread outward. As a result, a joint material (7) having a seal body (5) having a U-shaped cross section at the center and a flat fixing portion (6) extending outward at both ends is obtained.
【００１５】上記２次加硫は、図３に示すように、製品
の円弧部分の位置に合わせて三角形を描くように配置し
た３つの丸棒（９）と、これを支持する支持部材（10）
とで構成される治具（11）にシート（１）をセットし、
シート（１）の薄肉部（３）を各丸棒（９）に押付ける
ことによって行なうことができる。In the secondary vulcanization, as shown in FIG. 3, three round bars (9) arranged so as to draw a triangle in accordance with the position of an arc portion of a product, and a supporting member (10) for supporting the same. )
Set the sheet (1) on the jig (11) composed of
This can be performed by pressing the thin portion (3) of the sheet (1) against each round bar (9).
【００１６】このようにして得られた目地材（７）を、
図２に示すようにシール本体部（５）を奥にしてケーソ
ン（12）（13）間の継ぎ目に押し込み、押え板（14）を
介して固定部（６）をケーソン壁面に密着させ、この状
態でボルト（図示せず）で固定することによって、目地
材（７）の取り付けが完了する。The joint material (7) thus obtained is
As shown in FIG. 2, the seal body (5) is pushed inward at the seam between the caissons (12) and (13) with the fixing body (6) in close contact with the caisson wall surface via the holding plate (14). By fixing it with bolts (not shown) in this state, attachment of the joint member (7) is completed.
【００１７】以上のように、本発明によれば、１次加硫
してシート（１）を作成し、これを断面Ｕ字型の部分を
持つように折り曲げた状態で２次加硫することとしてい
るので、簡易な治具（11）を使って各種サイズの製品仕
様に対応することができる。異なる仕様の製品は、治具
（11）のうちの丸棒（９）の位置や寸法を変更すれば製
作できるので、個々の製品仕様に合った金型をその都度
製作する場合に比べると製作コストの低減が図れる。ま
た、シート（１）の円弧状に成形する部分を薄肉部（3
a）（3b）としているので、２次加硫の際に薄肉部（3
a）（3b）を折り曲げて治具（11）にセットする場合で
も良好な作業性が確保できる。As described above, according to the present invention, the sheet (1) is prepared by primary vulcanization, and the sheet (1) is subjected to secondary vulcanization in a state of being bent so as to have a U-shaped section. Therefore, it is possible to respond to product specifications of various sizes using a simple jig (11). Products with different specifications can be manufactured by changing the position and dimensions of the round bar (9) of the jig (11). Cost can be reduced. Also, the part of the sheet (1) to be formed into an arc shape is a thin part (3
a) (3b), the thin part (3
a) Good workability can be ensured even when (3b) is bent and set on the jig (11).
【００１８】なお、以上の説明では、３つの薄肉部（3
a）（3b）を設ける場合について説明したが、少なくと
も中央の薄肉部（3b）（シール本体部５の円弧部5aを形
成する部分）のみが薄肉であれば、他の部分を一様に厚
肉部（２）としても構わない。In the above description, three thin portions (3
a) The case where (3b) is provided has been described. However, if at least only the central thin portion (3b) (the portion forming the arc portion 5a of the seal body 5) is thin, the other portions are uniformly thick. The meat part (2) may be used.
【００１９】図４は、二次加硫工程の他の方法を示す断
面図である。これは、各厚肉部（２）の間に先端部を半
円形にした成形治具（16）を介在させつつ各薄肉部（3
a）（3b）を１８０°反転するように屈曲させてシート
（１）を折り畳み、これを上下からプレス盤（17）でプ
レスして二次加硫するものである。この方法で得られた
目地材は断面Ｗ型となるので、ケーソン（12）（13）へ
の取り付けに際しては、シール本体部（５）との間の角
度が90°となるように固定部（６）を外側に押し広げな
がら装着する必要があるが、取り付け後は、シール本体
部（５）の厚肉部（２）が弾性によって外側に開こうと
し、ケーソン（12）（13）の側面と密着するので、シー
ル性のさらなる向上が達成される。FIG. 4 is a sectional view showing another method of the secondary vulcanization step. This is achieved by interposing a molding jig (16) having a semicircular tip portion between the thick portions (2) while interposing each thin portion (3).
a) The sheet (1) is folded by bending (3b) to be inverted by 180 °, and the sheet (1) is pressed from above and below with a press plate (17) to perform secondary vulcanization. Since the joint material obtained by this method has a W-shaped cross section, when the joint member is attached to the caisson (12) (13), the fixing portion (90) is formed so that the angle with the seal body (5) becomes 90 °. 6) It is necessary to attach while pushing outward, but after attachment, the thick portion (2) of the seal body (5) tries to open outward by elasticity, and the side surfaces of the caisson (12) (13) Because of this, further improvement of the sealing performance is achieved.
【００２０】[0020]
【実施例】以下、本発明の実施例を説明する。 ［実施例１］先ず１次加硫にて、ＥＰＤＭを外面ゴムの
主成分とし且つナイロン繊維（４）で補強した長さ１０
ｍのゴムシート（１）を製作した。ゴムシート（１）の
各部の寸法は（図５参照）、厚肉部（２）の厚さｔ1 ＝
８mm、薄肉部（3a、3b）の厚さｔ2 ＝５mm、全幅Ｌ＝５
２５. ５mm、ａ＝ｇ＝７５mm、ｂ＝ｆ＝２３．５mm、ｃ
＝ｅ＝１２５mm、ｄ＝７８．５mmとした。また、１次加
硫は、１４５℃×１５分の条件で行なった。Embodiments of the present invention will be described below. [Example 1] First, a primary vulcanization was performed with a length of 10 in which EPDM was a main component of the outer surface rubber and reinforced with nylon fiber (4).
m rubber sheet (1) was produced. The dimensions of each part of the rubber sheet (1) (see FIG. 5) are as follows: the thickness t 1 of the thick part (2) =
8 mm, thickness t 2 of thin portions (3a, 3b) = 5 mm, overall width L = 5
25.5 mm, a = g = 75 mm, b = f = 23.5 mm, c
= E = 125 mm and d = 78.5 mm. The primary vulcanization was performed at 145 ° C. × 15 minutes.
【００２１】次にこのゴムシート（１）を図３に示す治
具（11）にセットし、これを温度１４５℃の加硫缶内に
３０分放置して２次加硫した。Next, the rubber sheet (1) was set on a jig (11) shown in FIG. 3, and was left in a vulcan at a temperature of 145 ° C. for 30 minutes for secondary vulcanization.
【００２２】その結果、中央の円弧部の曲率半径を２５
mmとし、両端の円弧部の曲率半径を１５mmとするケーソ
ン用目地材（７）が得られた。 ［実施例２］先ず１次加硫にて、ＥＰＤＭを外面ゴムの
主成分とし且つナイロン繊維で補強した長さ１０ｍのゴ
ムシート（１）を製作した。ゴムシート（１）の各部の
寸法は（図５参照）、厚肉部（２）の厚さｔ1 ＝１５m
m、薄肉部（3a、3b）の厚さｔ 2 ＝８mm、全幅Ｌ＝７４
７mm、ａ＝ｇ＝２００mm、ｂ＝ｆ＝２３．５mm、ｃ＝ｅ
＝１５０mm、ｄ＝９５mmとした。また、１次加硫は、１
５０℃×１５分の条件で行なった 。As a result, the radius of curvature of the central arc is 25
mm, and the radius of curvature of the arc at both ends is 15 mm
A joint material (7) was obtained. [Example 2] First, EPDM was applied to the outer rubber by primary vulcanization.
The main component and reinforced with nylon fiber
A sheet (1) was produced. Each part of the rubber sheet (1)
The dimensions are (see FIG. 5), the thickness t of the thick part (2)1= 15m
m, thickness t of thin part (3a, 3b) Two= 8mm, Overall width L = 74
7 mm, a = g = 200 mm, b = f = 23.5 mm, c = e
= 150 mm and d = 95 mm. The primary vulcanization is 1
The test was performed at 50 ° C. for 15 minutes.
【００２３】次にこのゴムシートを図４に示すプレス盤
（17）にセットし、これを温度１５０℃、プレス圧５０
kg/cm2で３０分間保持して２次加硫した。Next, the rubber sheet was set on a press board (17) shown in FIG.
The secondary vulcanization was performed while maintaining the pressure at kg / cm 2 for 30 minutes.
【００２４】その結果、中央の円弧部の曲率半径を３０
mmとし、両端の円弧部の曲率半径を１５mmとするケーソ
ン用目地材（７）が得られた。As a result, the radius of curvature of the central arc is set to 30.
mm, and a joint material for caisson (7) was obtained in which the radius of curvature of the arc portions at both ends was 15 mm.
【００２５】[0025]
【発明の効果】本発明によれば、１次加硫でシートを作
成し、これを断面Ｕ字型の部分を持つように折り曲げた
状態で２次加硫することとしているので、簡易な治具を
使って各種サイズの製品仕様に低コストに対応すること
ができる。また、１次加硫にてシートに薄肉部を設けて
いるので、２次加硫の際にこの薄肉部を円弧状に曲げる
場合でも容易に曲げることができ、良好な作業性が確保
される。According to the present invention, a sheet is prepared by primary vulcanization, and the sheet is subjected to secondary vulcanization in a state where the sheet is bent so as to have a U-shaped cross section. By using the tool, it is possible to respond to product specifications of various sizes at low cost. In addition, since the thin portion is provided on the sheet by the primary vulcanization, even when the thin portion is bent in an arc shape during the secondary vulcanization, it can be easily bent, and good workability is secured. .
【図１】１次加硫にて成形されたゴムシートの斜視図で
ある。FIG. 1 is a perspective view of a rubber sheet formed by primary vulcanization.
【図２】２次加硫にて成形されたケーソン用目地材の断
面図である。FIG. 2 is a cross-sectional view of a caisson joint material formed by secondary vulcanization.
【図３】治具にセットされたゴムシートの断面図であ
る。FIG. 3 is a cross-sectional view of a rubber sheet set on a jig.
【図４】プレス盤にセットされたゴムシートの断面図で
ある。FIG. 4 is a cross-sectional view of a rubber sheet set on a press board.
【図５】１次加硫にて成形されたゴムシートの断面図で
ある。FIG. 5 is a cross-sectional view of a rubber sheet formed by primary vulcanization.
【図６】ケーソンを用いた護岸の断面図である。FIG. 6 is a sectional view of a revetment using a caisson.
【図７】（ａ）図は従来のケーソン用目地材（Ｌ型）の
断面図、（ｂ）図はケーソン側面に取付けた当該目地材
の斜視図である。7A is a cross-sectional view of a conventional caisson joint material (L type), and FIG. 7B is a perspective view of the joint material attached to a caisson side surface.
【図８】（ａ）図は従来のケーソン用目地材（Ｕ型）の
断面図、（ｂ）図はケーソン側面に取付けた当該目地材
の斜視図である。8A is a cross-sectional view of a conventional caisson joint material (U type), and FIG. 8B is a perspective view of the joint material attached to the side of the caisson.
１ シート ２ 厚肉部 3a 薄肉部 3b 薄肉部 5a 円弧部 ７ 目地材 12 ケーソン 13 ケーソン 1 Sheet 2 Thick part 3a Thin part 3b Thin part 5a Arc part 7 Joint material 12 Caisson 13 Caisson
Claims (3)
面の少なくとも１箇所に当該厚みよりも薄い薄肉部を持
つように製作されたゴムシートを、２次加硫にてその薄
肉部を円弧状に曲げて成形したケーソン用目地材。1. A rubber sheet manufactured so as to have a thinner portion thinner than at least one portion of a plate-shaped cross section having a desired thickness by primary vulcanization in a secondary vulcanization. Caisson joint material formed by bending the part into an arc shape.
孤長と等しくした請求項１記載のケーソン用目地材。2. The joint material for caisson according to claim 1, wherein the width of the thin portion is equal to the arc length of the arc portion after the secondary vulcanization.
れを断面Ｕ字型の部分を持つように折り曲げた状態で２
次加硫するケーソン用目地材の製造方法。3. A rubber sheet is prepared by primary vulcanization, and the rubber sheet is bent so as to have a U-shaped section.
A method for producing a caisson joint material to be vulcanized next.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25376897A JPH1193139A (en) | 1997-09-18 | 1997-09-18 | Joint material for caisson and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25376897A JPH1193139A (en) | 1997-09-18 | 1997-09-18 | Joint material for caisson and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1193139A true JPH1193139A (en) | 1999-04-06 |
Family
ID=17255880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25376897A Pending JPH1193139A (en) | 1997-09-18 | 1997-09-18 | Joint material for caisson and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1193139A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767161A (en) * | 2012-07-18 | 2012-11-07 | 中国水利水电第五工程局有限公司 | Protector for vertical rubber stanch belt |
| KR20150099376A (en) * | 2014-02-21 | 2015-08-31 | 니혼 빅토릭 가부시끼가이샤 | Flexible joint member and expandable joint for concrete structure |
-
1997
- 1997-09-18 JP JP25376897A patent/JPH1193139A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767161A (en) * | 2012-07-18 | 2012-11-07 | 中国水利水电第五工程局有限公司 | Protector for vertical rubber stanch belt |
| CN102767161B (en) * | 2012-07-18 | 2015-03-18 | 中国水利水电第五工程局有限公司 | Protector for vertical rubber stanch belt |
| KR20150099376A (en) * | 2014-02-21 | 2015-08-31 | 니혼 빅토릭 가부시끼가이샤 | Flexible joint member and expandable joint for concrete structure |
| JP2015158047A (en) * | 2014-02-21 | 2015-09-03 | 日本ヴィクトリック株式会社 | Flexible joint member and expansion joint for concrete structure |
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