JPH0626636Y2 - Joint sealant - Google Patents
Joint sealantInfo
- Publication number
- JPH0626636Y2 JPH0626636Y2 JP1988058856U JP5885688U JPH0626636Y2 JP H0626636 Y2 JPH0626636 Y2 JP H0626636Y2 JP 1988058856 U JP1988058856 U JP 1988058856U JP 5885688 U JP5885688 U JP 5885688U JP H0626636 Y2 JPH0626636 Y2 JP H0626636Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- seal member
- swellable
- swellable seal
- joint
- 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.)
- Expired - Lifetime
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Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、目地シール材に係り、より詳細には、シール
ド工事などにおいてセグメントの継手目地部分からの漏
水を防止する目地シール材に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a joint seal material, and more particularly to a joint seal material for preventing water leakage from a joint joint portion of a segment in shield construction or the like.
セグメントを抗内で管状に組み立て、トンネルを構築す
るシールド工法においては、各隣接セグメント間の継手
目地が多い。そして、この部分の継手面には、シールド
ジャッキ推力による繰り返し荷重や土圧の経時的変化に
より、空隙が生じ易く、しかも、シールドトンネルは、
地下水位下に構築されることが多いのと相まって、その
空隙から漏水するという問題がある。In a shield construction method in which segments are assembled into a tubular shape within a tunnel to construct a tunnel, there are many joint joints between adjacent segments. And, in the joint surface of this part, a gap is apt to occur due to the repeated load due to the thrust force of the shield jack and the temporal change of the earth pressure, and moreover, the shield tunnel is
In addition to being often constructed below the groundwater level, there is the problem of water leakage from the void.
そこで、今日では、該漏水による水膨張圧で止水を可能
にした水膨潤性ゴムを材料として用いた目地シール材が
用いられるようになっている。しかし、該水膨潤性ゴム
を用いたシール材の場合、膨潤しすぎて、セグメントの
側方に垂れ出して膨出するという問題が指摘されてい
る。そこで、該問題を軽減するものとして、近年、第４
図に示すような『中間部に水膨潤性シール部材１を介在
させ、その両側に非水膨潤性シール部材２、２を配した
構成の目地シール材』（実開昭６０−１５９０９９号公
報参照）が提案されている。Therefore, nowadays, a joint sealant using a water-swelling rubber capable of stopping water by the water expansion pressure due to the water leakage is used. However, it has been pointed out that in the case of a sealing material using the water-swellable rubber, it swells too much and swells to the side of the segment. Therefore, in order to reduce the problem, the fourth
As shown in the figure, "a joint seal member having a structure in which a water-swellable seal member 1 is interposed in the middle portion and non-water-swellable seal members 2 and 2 are arranged on both sides thereof" (see Japanese Utility Model Laid-Open No. 60-159099). ) Is proposed.
該目地シール材は、ゴム弾性によるシール効果と、吸水
膨張によるシール効果を併せ持ち、かつ側方への水膨潤
性シール部材の膨らみを非水膨潤性シール部材によって
制限するので、『シール材が膨潤によってセグメント側
方に膨出してシール効果を低下させる』という従来の水
膨潤性ゴムを用いた目地シール材の問題を解消できると
いう利点を有する。The joint sealant has both a sealing effect due to rubber elasticity and a sealing effect due to water absorption expansion, and restricts the lateral swelling of the water-swellable seal member by the non-water-swellable seal member. It has an advantage that the problem of the conventional joint seal material using the water-swellable rubber can be solved.
しかし、上述した目地シール材の場合、次ぎのような問
題がある。すなわち、 水膨潤性シール部材１が、隣接セグメント間で、最初
より圧縮・締付されているので、膨潤によって強度が低
下すると共に、劣化が促進されやすい。However, the joint sealing material described above has the following problems. That is, since the water-swellable seal member 1 is compressed and tightened between the adjacent segments from the beginning, the strength is lowered and the deterioration is easily promoted by the swelling.
水膨潤性シール部材１は、一成形体で形成されている
ので、亀裂等が生じた場合、そのシール自体の強度が低
下し易い。Since the water-swellable seal member 1 is formed of one molded body, the strength of the seal itself is apt to decrease when a crack or the like occurs.
本考案は、上述した点に対処して創案したものであっ
て、その目的とする処は、水膨潤性シール材の強度低下
を軽減し、かつ隣接セグメント間の強固な結合強度を得
ると共にシール材の強度の低下を軽減できる目地シール
材を提供することにある。The present invention has been made in view of the above-mentioned points, and its purpose is to reduce the decrease in strength of a water-swellable sealing material, obtain a strong bonding strength between adjacent segments, and seal the same. It is an object of the present invention to provide a joint sealing material that can reduce the deterioration of the strength of the material.
そして、上記目的を達成するための手段としての本考案
の目地シール材は、横幅方向中間部に水膨潤性シール部
材を介在させ、その少なくとも両側部に非水膨潤または
低水膨潤性シール部材を配設した帯状の目地シール材で
あって、前記横幅方向中間部に介在されている水膨潤性
シール部材が、径の異なる複数個の断面円形状シール部
材を横幅方向に重合して形成され、径の大きい断面円形
状シール部材を中央にして、その両側に径の小さい断面
円形状シール部材を配設され、かつ該断面円形状シール
部材のそれぞれの上側曲面部分が露出している構成より
なる。The joint seal material of the present invention as a means for achieving the above object has a water-swellable seal member interposed in the lateral width direction intermediate portion, and a non-water-swellable or low-water-swellable seal member at least on both sides thereof. A band-shaped joint seal member arranged, wherein the water-swellable seal member interposed in the lateral width direction intermediate portion is formed by polymerizing a plurality of circular cross-sectional seal members having different diameters in the lateral width direction, A circular cross-section seal member having a large diameter is located at the center, and circular cross-section seal members having a small diameter are arranged on both sides of the seal member, and upper curved portions of the circular cross-section seal members are exposed. .
そして、上記構成に基づく本考案の目地シール材は、シ
ールドトンネル築造の際のセグメント等の継手面に添設
してセグメント等の構築物をボルトなどで結合するもの
である。水膨潤性シール部材は、径の異なる断面円形状
の成形体を並べて加硫一体化され、それぞれの下部、側
部が非水膨潤性シール部材または低水膨潤性シール部材
と一体結合され、それぞれの上側部分が露出し、かつそ
の径が異なるので、その体積が異なるため、それぞれ独
立的にセグメント間で結合し、漏水の場合、各断面円形
状の成形体がそれぞれ異なった膨潤作用を呈し、漏水個
所の有った個所におけるセグメント間での締付結合が強
固になるように作用する。また独立的に作用するので亀
裂が生じても、各成形体が独立して強度を付与するので
全体として強度を低下させないように作用する。The joint sealing material of the present invention based on the above structure is attached to a joint surface of a segment or the like when constructing a shield tunnel, and the structure of the segment or the like is coupled with a bolt or the like. The water-swellable seal member is formed by arranging vulcanized and integrated molded bodies having circular cross-sections having different diameters, and the lower and side portions of each are integrally joined with the non-water-swellable seal member or the low-water-swellable seal member, respectively. Since the upper part of the is exposed, and its diameter is different, its volume is different, so each segment is independently bonded to each other, and in the case of water leakage, each cross-sectional circular shaped molded body exhibits a different swelling action, It acts to strengthen the tightening connection between the segments at the location where there was water leakage. Further, since they act independently, even if cracks occur, each molded body imparts strength independently, so that the strength does not decrease as a whole.
そして、水膨潤性シール部材と両側の非水膨潤または低
水膨潤性シール部材によって止水すると共に該非水膨潤
または低水膨潤性シール部材によって水膨潤性シール部
材の垂れ出し膨出を防止するようにも作用する。The water-swellable seal member and the non-water-swellable or low-water-swellable seal members on both sides stop water, and the non-water-swellable or low-water swellable seal member prevents the water-swellable seal member from bulging out. Also works.
以上のように、本考案の目地シール材は、中間部の水膨
潤性シール部材を径の異なる断面円形状の成形体を複数
個並べ、これを一体化し、かつそれぞれの水膨潤性シー
ル部材の上側部分を露出させた点に特徴を有し、この点
によって、シール部材の劣化を軽減すると共にシール効
果を向上させることができるという格別な作用を奏する
シール部材である。As described above, the joint seal material of the present invention has the water-swellable seal member in the middle portion, which is formed by arranging a plurality of molded articles having circular cross-sections having different diameters and integrating them. The seal member is characterized in that the upper side portion is exposed, and by this point, deterioration of the seal member can be reduced and the sealing effect can be improved, which is a special effect.
以下、図面を参照しながら本考案を具体化した実施につ
いて詳細に説明する。Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
ここに、第１図は帯状シール材の横断面図、第２図は取
付状態を示す説明図である。なお、従来例と同一対応個
所には同一符号を附した。Here, FIG. 1 is a cross-sectional view of the band-shaped sealing material, and FIG. 2 is an explanatory view showing a mounted state. The same parts as those in the conventional example are designated by the same reference numerals.
本実施例の目地シール材は、基本的構成において、従来
の目地シール材と同様にあって、概略すると、その横幅
方向中間部に水膨潤性シール部材１を介在させ、水膨潤
性シール部材１の両側部に非水膨潤性シール部材２、２
を配設して帯状に形成し、加硫成形した構成よりなる。The joint sealing material of the present embodiment has a basic configuration similar to that of the conventional joint sealing material, and, roughly speaking, the water swelling sealing member 1 is interposed in the lateral width direction intermediate portion, and the water swelling sealing member 1 is provided. Non-swelling seal members 2, 2 on both sides of the
Is formed into a strip shape and is vulcanized and molded.
そして、中間部の水膨潤性シール部材１は、断面円形状
の成形体３を三個並べて一体化した構造となっている。
すなわち、中央に大径の成形体３ａを配置し、その両横
に小径の成形体３ｂ、３ｂを配置し、かつその上端が水
平状になるように配置されて波形を形成するように、加
硫一体化された構成となっている。そして、その山頂の
高さ（厚み）ｈ１を、両側部の非水膨潤（低水膨潤）性
シール部材２、２の高さ（厚み）ｈ２より低くした構成
となっている。そして、水膨潤性シール部材１は、水膨
潤性ゴム弾性材で形成されていて、具体的には、ＡＢＳ
（アクリロニトリル・ブタジエン・スチレン共重合体）
樹脂や天然ゴムと高吸水性ポリマー（アクリル酸ビニル
アルコール共重合体）とに顔料と加硫剤を入れた生地
と、該顔料と加硫剤を入れていない生地とを等量混合し
て成形したもの（登録商標「アクアケル」：王子ゴム化
成（株）製）を用いている。The water-swellable seal member 1 in the middle portion has a structure in which three molded articles 3 having a circular cross section are arranged and integrated.
That is, the large-diameter molded body 3a is arranged in the center, the small-diameter molded bodies 3b, 3b are arranged on both sides of the large-diameter molded body 3a, and the upper ends thereof are arranged horizontally to form a corrugated shape. It has an integrated structure. The height (thickness) h 1 of the peak is lower than the height (thickness) h 2 of the non-water swelling (low water swelling) seal members 2 and 2 on both sides. The water-swellable seal member 1 is made of a water-swellable rubber elastic material.
(Acrylonitrile-butadiene-styrene copolymer)
Molded by mixing resin and natural rubber, superabsorbent polymer (vinyl acrylate alcohol copolymer) with pigment and vulcanizing agent, and equal amount of the pigment and vulcanizing agent-free material. The product (registered trademark "Aquakel": manufactured by Oji Rubber Kasei Co., Ltd.) is used.
なお、図面においては、水膨潤性シール部材１を三個の
断面円形状の成形体を一体化した構成で説明したが、二
個、あるいは四個以上の成形体を並べた構成としてもよ
い。In the drawings, the water-swellable seal member 1 is described as having a configuration in which three molded articles having circular cross-sections are integrated, but two or four or more molded articles may be arranged side by side.
非水膨潤性シール部材２は、上面が平坦状に形成され、
隣接する水膨潤性シール部材２とは連続した曲面を形成
している。そして、非水膨潤性シール部材２としては、
通常シール材として用いられるブチルゴム系、ネオプレ
ーンゴム系等の圧縮に対する弾性反発力の優れたものを
使用している。なお、非水膨潤性シール部材の代わりに
低水膨潤性シール部材を用いる場合は、三倍の体積膨張
率程度の用いる。そして、水膨潤性シール部材としては
五倍以上の体積膨張率を有するものを用いるようにして
いる。The non-water-swellable seal member 2 has a flat upper surface,
The adjacent water-swellable seal member 2 forms a continuous curved surface. And as the non-water-swellable seal member 2,
A material such as butyl rubber or neoprene rubber, which is usually used as a sealing material, which has an excellent elastic repulsion force against compression is used. When a low water swellable seal member is used instead of the non-water swellable seal member, the volume expansion coefficient is about three times. Then, as the water-swellable seal member, one having a volume expansion coefficient of five times or more is used.
そして、本実施例の目地シール材は、セグメント間にお
いて、両側部の非膨潤性シール部材２、２が最初から常
に隣接セグメント等に面接圧着され、隣接セグメント等
を強固に締めつけられて、経時変化により隣接セグメン
ト等の間に空隙ができて漏水があると一次止水し、更
に、その漏水が水膨潤性シール部材に触れると該水膨潤
性シール部材の各成形体が独立して膨張して空隙を塞い
で二次止水するように作用する。すなわち、それぞれの
水膨潤性シール部材３ａ、３ｂ、３ｃは、底部または側
部で非水膨潤性シール部材２と加硫により一体結合され
ているので、水膨潤性シール部材３ａ、３ｂ、３ｃが水
に触れると、それぞれが水膨潤によって非水膨潤性シー
ル部材２と一体化されていない部分から膨らむことにな
り、かつ水膨潤性シール部材３ａ、３ｂ、３ｃは断面円
形状であるため、隣接する水膨潤性シール部材間の上側
部分に形成される窪みを埋めるように膨張し、また中央
に位置する水膨潤性シール部材３ｂは、左右に位置する
水膨潤性シール部材３ａ、３ｃに比べて、その体積が大
きいため、水の吸収許容量がおおきく、その膨張度合い
が大きくなり、左右の水膨潤性シール部材３ａ、３ｃが
水膨潤し終えた後であっても水膨潤し、そのシール作用
を向上させるように作用する。In the joint seal material of the present embodiment, the non-swelling seal members 2 and 2 on both sides between the segments are always face-contact-bonded to the adjacent segments from the beginning, and the adjacent segments are firmly tightened to change with time. Due to this, a gap is formed between adjacent segments and the like, and if there is water leakage, primary water stopping is performed, and further, when the water leakage contacts the water swellable seal member, each molded body of the water swellable seal member expands independently. It acts as a secondary water stop by closing the void. That is, since each of the water-swellable seal members 3a, 3b, 3c is integrally bonded to the non-water-swellable seal member 2 at the bottom or side by vulcanization, the water-swellable seal members 3a, 3b, 3c are When they come into contact with water, they will swell due to water swelling from the parts that are not integrated with the non-water swellable seal member 2, and the water swellable seal members 3a, 3b, 3c have a circular cross-section, and therefore are adjacent to each other. The water-swellable seal member 3b that expands so as to fill the recess formed in the upper portion between the water-swellable seal members that are located in the center of the water-swellable seal member Since its volume is large, the amount of water that can be absorbed is large, and the degree of expansion thereof is large, and even after the left and right water-swellable seal members 3a and 3c have finished swelling with water, the water swells and the seal Act to improve the use.
また、両側の非膨潤性シール部材によって水膨潤性シー
ル部材の垂れ出し膨出も防止されるように作用する。ま
た、非膨潤性シール部材２、２と水膨潤性シール部材１
の山頂部が隣接セグメントの継手面に接し、隣接セグメ
ントを強固に締めつけることができるように作用する。Further, the non-swelling seal members on both sides act to prevent the water-swellable seal member from bulging out. In addition, the non-swellable seal members 2 and 2 and the water-swellable seal member 1
The crests of the contact with the joint surface of the adjacent segment, so that the adjacent segment can be firmly tightened.
なお、本考案は、上述した実施例に限定されるものでな
く、本考案の要旨を変更しない範囲での変形実施可能な
ことは明らかである。因みに、第３図（ａ）に示すよう
に、図１に示す構成を左右方向に複数個連接して重合一
体化した構成としてもよい。そして、この構成の場合
は、より好ましいシール効果を得ることができる。ここ
で、両端部を除く中間部における非水膨潤性シール部材
の代わりに水膨潤性シール部材より低水膨潤の性質を有
する低水膨潤性シール部材で形成した構成としてもよ
い。さらに、第３図（ｂ）に示すように、両側部の非水
膨潤性シール部材を、その断面形状が、外側方向に窪む
弧状に形成するようにした構成としてもよい。そして、
この構成の場合、セグメント継手面に対する引っ掛かり
作用を奏させて、横ずれを防止できるという利点を有す
る。また、該弧状の部材を複数個並列に配置して引っ掛
かり作用を向上させるようにしてもよく、更に弧状の代
わりに『リブ』状の構成としてもよい。It should be noted that the present invention is not limited to the above-mentioned embodiments, and it is obvious that the present invention can be modified and implemented without changing the gist of the present invention. Incidentally, as shown in FIG. 3 (a), a plurality of the configurations shown in FIG. Further, in the case of this configuration, a more preferable sealing effect can be obtained. Here, instead of the non-water-swellable seal member in the intermediate portion excluding both end portions, a low-water-swellable seal member having a property of lower water swelling than the water-swellable seal member may be formed. Furthermore, as shown in FIG. 3 (b), the non-water-swellable seal members on both sides may be formed so that the cross-sectional shape thereof is an arc shape recessed in the outward direction. And
In the case of this configuration, there is an advantage that the segment joint surface can be caught and the lateral displacement can be prevented. In addition, a plurality of the arc-shaped members may be arranged in parallel to improve the catching action, and a “rib” -shaped configuration may be used instead of the arc-shaped members.
以上の記載より明らかなように、本考案の目地シール材
によれば、径の大きい断面円形状水膨潤性シール部材を
中央にして、その両側に径の小さい断面円形状水膨潤性
シール部材を並べて、それぞれの下部、側部を非水膨潤
性シール部材または低水膨潤性シール部材と一体結合
し、それぞれの上側部分を露出させているので、それぞ
れ独立的にセグメント間で結合し、漏水の場合、中央側
の断面円形状水膨潤性シール部材と両側の断面円形状水
膨潤性シール部材の径が異なり、その体積が異なるた
め、各断面円形状の成形体がそれぞれ異なった膨潤作用
を呈することにより、漏水個所の有った個所におけるセ
グメント間での締付結合が強固になると共に、一個の成
形体の強度が亀裂等によって低下しても他の成形体によ
って補完し、水膨潤性シール部材の強度を保持し、その
シール効果を向上させることができるという効果を有す
る。As is clear from the above description, according to the joint seal material of the present invention, a circular cross-section water-swellable seal member having a large diameter is located at the center, and a circular cross-section water-swellable seal member having a small diameter is provided on both sides thereof. Side by side, the lower and side parts of each are integrally joined with the non-water-swellable seal member or the low-water-swellable seal member, and the upper part of each is exposed, so that they are independently joined between the segments to prevent water leakage. In this case, since the diameter of the water-swellable seal member having a circular cross-section on the center side and the diameter of the water-swellable seal member having a circular cross-section on both sides are different and the volumes thereof are different, each of the molded products having a circular cross-section exhibits different swelling action. This strengthens the tightening connection between the segments where there was water leakage, and even if the strength of one molded product decreases due to cracks, etc., it is complemented by another molded product and the water swellability is improved. Retain the strength of the seal member has the effect that it is possible to improve the sealing effect.
第１図は本考案の一実施例を示す横断面図、第２図は取
付状態を示す説明図、第３図（ａ）（ｂ）は他の実施例
の横断面図、第４図は従来例を示す横断面図である。 １…水膨潤性シール部材、２…非膨潤性シール部材、３
…成形体FIG. 1 is a cross sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory view showing a mounting state, FIGS. 3 (a) and 3 (b) are cross sectional views of other embodiments, and FIG. It is a cross-sectional view showing a conventional example. 1 ... Water-swellable sealing member, 2 ... Non-swellable sealing member, 3
… Molded body
Claims (1)
在させ、その少なくとも両側部に非水膨潤または低水膨
潤性シール部材を配設した帯状の目地シール材であっ
て、前記横幅方向中間部に介在されている水膨潤性シー
ル部材が、径の異なる複数個の断面円形状シール部材を
横幅方向に重合して形成され、径の大きい断面円形状シ
ール部材を中央にして、その両側に径の小さい断面円形
状シール部材を配設され、かつ該断面円形状シール部材
のそれぞれの上側曲面部分が露出していることを特徴と
する目地シール材。1. A band-shaped joint seal material in which a water-swellable seal member is interposed in the middle portion in the widthwise direction, and a non-water-swellable or low-water-swellable seal member is disposed on at least both sides of the sealant member. The water-swellable seal member interposed in the middle portion is formed by superposing a plurality of circular cross-section seal members having different diameters in the lateral width direction, and the large-diameter cross-section circular seal member is located at the center and both sides thereof are formed. A joint seal material, characterized in that a circular cross-section seal member having a small diameter is disposed on the upper part, and an upper curved surface portion of each of the circular cross-section seal members is exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988058856U JPH0626636Y2 (en) | 1988-04-30 | 1988-04-30 | Joint sealant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988058856U JPH0626636Y2 (en) | 1988-04-30 | 1988-04-30 | Joint sealant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01164399U JPH01164399U (en) | 1989-11-16 |
| JPH0626636Y2 true JPH0626636Y2 (en) | 1994-07-20 |
Family
ID=31284653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988058856U Expired - Lifetime JPH0626636Y2 (en) | 1988-04-30 | 1988-04-30 | Joint sealant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626636Y2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57121529U (en) * | 1981-01-26 | 1982-07-28 | ||
| JPS60159099U (en) * | 1984-03-28 | 1985-10-23 | シ−アイ化成株式会社 | Joint sealing material |
| JPS6216317A (en) * | 1985-07-02 | 1987-01-24 | 株式会社 共和 | Bundling device for vegetable, etc. |
| JPS6226498U (en) * | 1985-07-31 | 1987-02-18 |
-
1988
- 1988-04-30 JP JP1988058856U patent/JPH0626636Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01164399U (en) | 1989-11-16 |
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