JPH08232279A - Cutoff structure of segment for civil engineering work - Google Patents
Cutoff structure of segment for civil engineering workInfo
- Publication number
- JPH08232279A JPH08232279A JP7038517A JP3851795A JPH08232279A JP H08232279 A JPH08232279 A JP H08232279A JP 7038517 A JP7038517 A JP 7038517A JP 3851795 A JP3851795 A JP 3851795A JP H08232279 A JPH08232279 A JP H08232279A
- Authority
- JP
- Japan
- Prior art keywords
- cushioning material
- segment
- water blocking
- mounting groove
- water
- 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
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Lining And Supports For Tunnels (AREA)
- Building Environments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、シールドトンネルの内
壁を構成する多数のセグメントを結合ボルト等により接
合されてなる土木工事用セグメントの接合面の止水構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stop structure for a joint surface of a civil engineering work segment in which a large number of segments constituting an inner wall of a shield tunnel are joined by connecting bolts or the like.
【０００２】[0002]
【従来の技術】例えば、市街地などの地下に掘削される
トンネル工事の施工には、シールド工法が採られてお
り、図１に示すような、ユニット化された多数のセグメ
ント１を用いて、トンネル施工の際に、各セグメント１
を坑道内の周壁方向ａと坑道の長さ方向ｂとの両方向に
沿い密に連結させるようになっている。そして、各セグ
メント１の４周の端面は、坑道内にてセグメント１を連
結させる際の、互いに隣接するセグメント１との接合面
２となっており、セグメント１の内側面１ａに各接合面
２に近接して形成された凹部３より接合面２にかけて穿
設された孔６を介して接合されるセグメント１同士を結
合ボルト等によって締着させ連結するようになってい
る。2. Description of the Related Art For example, a shield construction method is adopted for construction of a tunnel construction to be excavated underground such as an urban area. At the time of construction, each segment 1
Are closely connected along both the circumferential wall direction a in the gallery and the longitudinal direction b of the gallery. Then, the end faces of the four circumferences of each segment 1 are joint faces 2 with adjacent segments 1 when the segments 1 are connected in the tunnel, and each joint face 2 is connected to the inner side face 1 a of the segment 1. The segments 1 to be joined via the holes 6 bored from the concave portion 3 formed close to the joint surface 2 to each other are fastened and coupled by a coupling bolt or the like.
【０００３】このセグメント１による施工において、坑
道の地山からの湧水が内部に漏水することを防止するた
めに、連結された各セグメント１の目地となる対向する
各接合面２には止水処理が施される。これは、各接合面
２に取付溝を形成し、この取付溝に略半部が突出するよ
うに帯状の止水材を接着固定させて、両接合面２を対向
させた際に、両止水材を密着させるようになっている。In the construction by the segment 1, in order to prevent the spring water from the ground of the mine from leaking into the interior, the joint surfaces 2 facing each other serving as joints of the connected segments 1 are still water-stopped. Processing is performed. This is because a mounting groove is formed on each joint surface 2, and a band-shaped water blocking material is adhesively fixed to the mounting groove so that a substantially half portion protrudes. It is designed to adhere water material.
【０００４】また、近年では、大口径シールドトンネル
の施工を行うために、各セグメント１が大型化されてお
り、接合面２の幅長が大きく形成されることから、各セ
グメント１の連結状態を安定させるように、この接合面
２には２本の取付溝が形成され、これら取付溝にそれぞ
れ帯状部材が並行して装着されるようになっている。こ
れら帯状部材は、地山に近接する外側面側の一方が止水
材とされ、内側面１ａに近接する他方が緩衝材とされて
いる。Further, in recent years, in order to construct a large-diameter shield tunnel, each segment 1 is enlarged, and the width of the joint surface 2 is formed to be large. For stability, two joining grooves are formed in the joint surface 2, and the belt-shaped members are fitted in parallel to the joining grooves, respectively. One of the outer surface sides of these strip-shaped members that is close to the natural ground is a water blocking material, and the other side that is close to the inner side surface 1a is a cushioning material.
【０００５】そして、これら従来の止水材と緩衝材とに
よる止水構造によれば、各セグメント１を締着結合する
際に、各止水材と緩衝材とは接合面２より突出している
ことから、両止水材のみ及び両緩衝材のみが互いに当接
する状態となるが、結合ボルトによる締着を行うこと
で、接合面２間の距離（目開き量）を縮め、各止水材を
圧縮させ止水効果を得るようになっている。According to the conventional water-stopping structure of the water-stopping material and the cushioning material, the water-stopping material and the cushioning material project from the joint surface 2 when the segments 1 are fastened and coupled. Therefore, only both the water blocking materials and both the cushioning materials come into contact with each other, but by tightening the connecting bolts, the distance (opening amount) between the joint surfaces 2 is shortened, and each water blocking material. It is designed to be compressed to obtain a water blocking effect.
【０００６】この締結作業は、目開き量をできるだけ小
さく、好ましくは０ｍｍとなるように作業が行われ、ト
ンネル完成後に地盤の変動などが起きた場合、セグメン
ト１同士を連結する接合面２，２間に間隙などを起こ
し、目開き量が再び生じた際にも、止水材の圧縮状態が
大きく変化せずに十分な止水効果を保たせるようにする
ためである。[0006] This fastening work is performed so that the opening amount is as small as possible, preferably 0 mm, and when the ground changes after the completion of the tunnel, the joint surfaces 2, 2 connecting the segments 1 to each other. This is for maintaining a sufficient water blocking effect without causing a large change in the compressed state of the water blocking material even when a gap or the like is caused between them and the amount of openings is generated again.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
た従来のセグメントの止水構造では、セグメントの接合
面に形成される一対の取付溝が、地山側の取付溝に比べ
内側面側の取付溝が短幅で深さの浅い形状とされてお
り、また、これら取付溝に装着される止水材と緩衝材と
が、両接合面が締結されて圧縮された際に、これら取付
溝の体積に納まる寸法に設計されているのみであり、そ
れぞれの圧縮率などが考慮されていなかった。そのた
め、緩衝材側の取付溝体積が著しく小さいために、止水
材の突出高さと同等の突出高さに形成させることができ
ず、セグメント同士の連結施工時にセグメントが内側方
向に傾いてしまい、体積の小さい緩衝材側の接合面の陵
部同士が接触してしまい、この陵部が損傷してしまうお
それがあった。However, in the above-described conventional water blocking structure for a segment, the pair of mounting grooves formed on the joint surface of the segment have a mounting groove on the inner side surface side as compared with a mounting groove on the natural ground side. It has a short width and a shallow depth, and when the water-stopping material and the cushioning material that are installed in these mounting grooves are compressed when both joint surfaces are fastened, the volume of these mounting grooves is reduced. It was designed only to fit, and the compression ratio of each was not taken into consideration. Therefore, since the volume of the mounting groove on the cushioning material side is extremely small, it cannot be formed to a protrusion height equivalent to the protrusion height of the water blocking material, and the segments incline inward when connecting the segments together, The ridges of the joint surface on the side of the cushioning material having a small volume may come into contact with each other, and this ridge may be damaged.
【０００８】そこで本発明は、上記問題点を解消するた
めに、シールドトンネル工法におけるセグメント同士の
連結時に、各セグメントの損傷を防止することのできる
土木工事用セグメントの止水構造を提供することを目的
としている。Therefore, in order to solve the above problems, the present invention provides a waterproofing structure for a civil engineering work segment which can prevent damage to each segment when connecting the segments in the shield tunnel method. Has an aim.
【０００９】[0009]
【課題を解決するための手段】次に、上記の目的を達成
するための手段を、実施例に対応する図面を参照して説
明する。この発明の土木工事用セグメントの止水構造
は、シールドトンネルを構築する土木工事用セグメント
の接合面の止水構造において、前記セグメント１の接合
面２には、長手方向に沿う一対の取付溝４，５が互いに
並行して形成されるとともに、坑内側となる内側面１ａ
側に沿う一方の取付溝４が、地山に対接する外側面側に
沿う他方の取付溝５に対し、深さが浅く、幅長が狭い形
状とされ、前記一方の取付溝４には、発泡倍率Ｃが１．
３〜３のゴム弾性を有する発泡体よりなる帯状の緩衝材
１０が装着され、前記他方の取付溝５には、前記緩衝材
１０より太径な帯状の止水材９が装着されるとともに、
前記緩衝材１０及び止水材９が前記接合面２より突出し
て装着され、かつそれぞれの突出高さｘ1 ，ｘ2 が略同
一高さとされていることを特徴としている。Means for achieving the above object will be described below with reference to the drawings corresponding to the embodiments. The waterproof structure for a civil engineering segment of the present invention is a waterproof structure for a joint surface of a civil engineering segment for constructing a shield tunnel, wherein the joint surface 2 of the segment 1 has a pair of mounting grooves 4 along the longitudinal direction. , 5 are formed in parallel with each other, and the inner side surface 1a is the inner side of the mine.
One of the mounting grooves 4 along the side has a shape that is shallower in depth and narrower in width than the other mounting groove 5 along the outer surface facing the natural ground. The expansion ratio C is 1.
A band-shaped cushioning member 10 made of foam having rubber elasticity of 3 to 3 is mounted, and a band-shaped waterproofing member 9 having a diameter larger than that of the buffer member 10 is mounted in the other mounting groove 5.
The cushioning material 10 and the water blocking material 9 are mounted so as to project from the joint surface 2, and the projecting heights x 1 and x 2 are substantially the same.
【００１０】なお、前記止水材９と前記緩衝材１０の前
記接合面２からの各突出高さｘ1 ，ｘ2 は、前記止水材
９の突出高さｘ2 に対して、前記緩衝材１０の突出高さ
ｘ1が、０．８から１．３倍の範囲となる構成としても
よい。[0010] Each projection height x 1, x 2 from the joint surface 2 of the cushioning material 10 and the water stopping material 9, with respect to the projection height x 2 of the water stopping member 9, the buffer The protrusion height x 1 of the material 10 may be in the range of 0.8 to 1.3 times.
【００１１】さらに、前記止水材９と前記緩衝材１０の
それぞれが前記取付溝４，５内の高さに圧縮された状態
における、前記止水材９の圧縮率に対する前記緩衝材１
０の圧縮率の比Ｐが、０．６から１．２の範囲とされる
構成としてもよい。Further, in the state where each of the water blocking material 9 and the cushioning material 10 is compressed to the height in the mounting grooves 4 and 5, the cushioning material 1 with respect to the compression ratio of the water blocking material 9.
The ratio P of the compression rate of 0 may be in the range of 0.6 to 1.2.
【００１２】[0012]
【作用】セグメント１の接合面２に形成される並行な一
対の取付溝４，５の坑内側となる内側面側に沿う一方の
取付溝４には緩衝材１０が装着され、地山に対接する外
側面側に沿う他方の取付溝５には止水材９が装着され
る。緩衝材１０及び止水材９は、セグメント１の接合面
２より突出されて装着されているとともに、それぞれの
突出高さｘ1 ，ｘ2 が止水材９の突出高さｘ2 に対する
緩衝材１０の突出高さｘ1 を０．８から１．３倍の範囲
の略同一高さとされている。そして、緩衝材１０及び止
水材９が装着されたセグメント１は、結合ボルト７とナ
ット８により多数結合されて接合され、トンネル等の内
壁面に沿ってこの内壁面を形成する。The cushioning material 10 is attached to one of the mounting grooves 4 along the inner side surface of the pair of parallel mounting grooves 4 and 5 formed on the joint surface 2 of the segment 1 which is on the inner side of the pit to oppose the natural ground. A water blocking material 9 is attached to the other mounting groove 5 along the contacting outer surface side. Buffer materials 10 and the water stopping member 9, together protrudes been with mounted from joint surface 2 of the segment 1, cushioning member each protrusion height x 1, x 2 is against the projection height x 2 of water stopping material 9 The protrusion height x 1 of 10 is approximately the same height in the range of 0.8 to 1.3 times. Then, the segment 1 to which the cushioning material 10 and the water blocking material 9 are attached is joined and joined by a large number of joining bolts 7 and nuts 8 to form the inner wall surface along the inner wall surface of the tunnel or the like.
【００１３】なお、緩衝材１０は、発泡倍率Ｃが１．３
〜３．０、好ましくは１．７〜２．５のゴム系材料より
なる発泡体から構成されており、また、前記止水材９と
前記緩衝材１０は、それぞれが前記取付溝４，５内の高
さに圧縮された状態における、前記止水材９の圧縮率に
対する前記緩衝材１０の圧縮率の比が、０．６から１．
２の範囲とされている。The cushioning material 10 has an expansion ratio C of 1.3.
.About.3.0, preferably 1.7 to 2.5, made of a foam material made of a rubber material, and the water blocking material 9 and the cushioning material 10 respectively have the mounting grooves 4, 5 respectively. The ratio of the compressibility of the cushioning material 10 to the compressibility of the water blocking material 9 in the state of being compressed to the inner height is from 0.6 to 1.
The range is 2.
【００１４】[0014]
【実施例】図１は本発明による土木工事用セグメントの
止水構造の一実施例を示す全体斜視図、図２は同実施例
によるセグメントの止水構造の断面図である。なお、以
下に説明する実施例において、上述した従来例と同一ま
たは同等部分には同一符号を付して説明し、説明を省略
する。1 is an overall perspective view showing an embodiment of a water blocking structure for a civil engineering segment according to the present invention, and FIG. 2 is a sectional view of the segment water blocking structure according to the same embodiment. In the embodiments described below, the same or equivalent parts as those of the above-described conventional example are designated by the same reference numerals, and the description thereof will be omitted.
【００１５】まず、このシールドトンネル工法に用いら
れるセグメント１は、従来の技術にて説明したように、
大口径シールドトンネルにて使用される大型なセグメン
ト１で、コンクリートなどより形成され、図１に示すよ
うに、４周の接合面２には、一対の取付溝４，５が、接
合面２の長手方向に沿うように、等間隔を保って互いに
並行して形成されている。First, the segment 1 used in this shield tunnel method is, as described in the prior art,
A large-sized segment 1 used in a large-diameter shield tunnel, which is made of concrete or the like. As shown in FIG. 1, a pair of mounting grooves 4 and 5 are provided on the joint surface 2 of four laps. They are formed in parallel with each other at equal intervals along the longitudinal direction.
【００１６】これら取付溝４，５は、図２に示すよう
に、坑内側となるセグメント１の内側面側に沿う一方の
取付溝４が、地山に対接するセグメント１の外側面に沿
う他方の取付溝５に対して、深さをやや浅く、かつ幅長
をやや狭い形状に形成されている。また、このセグメン
ト１には、図１に示すように、内側面１ａに各接合面２
に近接して複数の凹部３が形成されており、セグメント
１同士を連結するために使用される結合ボルト７などの
連結固定部材が挿通される孔６が凹部３内から接合面２
に穿設されている。As shown in FIG. 2, one of the mounting grooves 4 and 5 along the inner side surface of the segment 1 that is the inner side of the mine is the other along the outer surface of the segment 1 that is in contact with the natural ground. The mounting groove 5 is formed so as to have a slightly shallow depth and a narrow width. In addition, in this segment 1, as shown in FIG.
A plurality of recesses 3 are formed in the vicinity of the recesses 3, and a hole 6 through which a connecting and fixing member such as a coupling bolt 7 used to connect the segments 1 is inserted is formed in the recess 3 from the inside of the recess 3.
Has been drilled in.
【００１７】次に、これら取付溝４，５に装着される止
水材９と緩衝材１０について説明する。まず止水材９
は、水分を吸収することにより体積が膨張する特性を有
する吸水性ポリアクリル酸系や吸水性ウレタン樹脂等の
吸水性樹脂とゴム材料とが混合成形し加硫された可撓性
を有する水膨張性ゴム材料より、所望の断面形状の成形
品とされ、あるいは前記水膨張性ゴム材料と通常のゴム
材料とを複合成形し共加硫された成形品からなるととも
に、その体積が前記他方の取付溝５の体積と同等となる
ように設定されている。なお、ゴム材料としては、クロ
ロプレンゴム、エチレン−プロピレン−ジエンゴム、ス
チレン−ブタジエンゴム等の合成ゴムや天然ゴムなどが
使用できる。Next, the water blocking material 9 and the cushioning material 10 mounted in the mounting grooves 4 and 5 will be described. First, the waterproof material 9
Is a flexible water-expandable product that is vulcanized by mixing and molding a water-absorbent resin such as a water-absorbent polyacrylic acid system or a water-absorbent urethane resin, which has the property of expanding in volume by absorbing water. Made from a flexible rubber material into a molded product with a desired cross-sectional shape, or from a molded product obtained by co-vulcanizing the water-expandable rubber material and an ordinary rubber material and co-vulcanizing it It is set to be equal to the volume of the groove 5. As the rubber material, synthetic rubber such as chloroprene rubber, ethylene-propylene-diene rubber, styrene-butadiene rubber or natural rubber can be used.
【００１８】また、緩衝材１０は、天然ゴムやクロロプ
レンゴム、エチレン−プロピレン−ジエンゴムなどの合
成ゴムを素材として、発泡倍率が１．３〜３．０、好ま
しくは１．７〜２．５とされた可撓質の発泡ゴムより帯
状に長尺に形成されているとともに、前記止水材９より
細径で断面積が小さく、体積が前記一方の取付溝４の体
積と同等となるように設定されている。The cushioning material 10 is made of synthetic rubber such as natural rubber, chloroprene rubber or ethylene-propylene-diene rubber, and has a foaming ratio of 1.3 to 3.0, preferably 1.7 to 2.5. The flexible foam rubber is formed in a long band shape, and has a smaller diameter and a smaller cross-sectional area than the water blocking material 9, and has a volume equivalent to that of the one mounting groove 4. It is set.
【００１９】そして、これら止水材９と緩衝材１０は、
前述したセグメント１の各接合面２に形成される並列し
た取付溝４，５内に接着などの固定手段によって装着さ
れる。装着された状態では、止水材９及び緩衝材１０の
接合面２からの各突出高さが略同一高さとなっている。The water blocking material 9 and the cushioning material 10 are
The segments 1 are mounted in the mounting grooves 4 and 5 formed in parallel on the respective joint surfaces 2 by fixing means such as bonding. In the mounted state, the projecting heights of the water blocking material 9 and the cushioning material 10 from the joint surface 2 are substantially the same.
【００２０】なお、これら取付溝４，５と、止水材９，
緩衝材１０を、具体的な数値を示して一例として詳述す
ると、図３に示すように、坑内側となる一方の取付溝４
は深さＢを２ｍｍとされ、地山側となる他方の取付溝５
は深さＡを６ｍｍと設定し、また、止水材９及び緩衝材
１０の装着状態における接合面２からの各突出高さ
ｘ 1 ，ｘ2 が、それぞれ３ｍｍの同一高さに設定されて
いる。すなわち、止水材９の高さ（厚さ）（ｘ2 ＋Ａ）
は９ｍｍ、緩衝材１０の高さ（厚さ）（ｘ1 ＋Ｂ）は５
ｍｍとされている。また、緩衝材１０の発泡倍率Ｃは２
に設定される。The mounting grooves 4 and 5 and the water blocking material 9
The cushioning material 10 will be described in detail as an example by showing specific numerical values.
Then, as shown in FIG. 3, one mounting groove 4 on the inner side of the mine
Has a depth B of 2 mm, and the other mounting groove 5 on the ground side
Has a depth A of 6 mm, and also has a waterproof material 9 and a cushioning material.
Each protrusion height from the joint surface 2 in the mounted state of 10
x 1, X2However, each is set to the same height of 3 mm
There is. That is, the height (thickness) (x2+ A)
Is 9 mm, the height (thickness) of the cushioning material 10 (x1+ B) is 5
It is set to mm. Further, the foaming ratio C of the cushioning material 10 is 2
Is set to.
【００２１】そして、これら止水材９及び緩衝材１０が
セグメント１に装着された状態で、他のセグメントと連
結されると、図２に示すように、互いに隣接し対向する
接合面２が密接されるように、すなわち、接合面２の間
隔である目開き量Ｌを０ｍｍとするように結合ボルト７
とナット８によって締着させることで連結され、この連
結状態において、止水材９及び緩衝材１０が圧縮され、
それぞれ取付溝４，５内に収容される。この止水材９と
緩衝材１０とが取付溝４，５内の高さに圧縮されて収容
された状態においては、止水材９の圧縮率に対する緩衝
材１０の圧縮率の比Ｐを次式より求められる。When the water blocking material 9 and the cushioning material 10 are mounted on the segment 1 and connected to another segment, as shown in FIG. So that the opening amount L, which is the distance between the joint surfaces 2, is set to 0 mm.
And the nut 8 are tightened to be connected, and in this connected state, the water blocking material 9 and the cushioning material 10 are compressed,
They are housed in the mounting grooves 4 and 5, respectively. In the state where the water blocking material 9 and the cushioning material 10 are compressed and housed in the mounting grooves 4 and 5, the ratio P of the compression rate of the cushioning material 10 to the compression rate of the water blocking material 9 is calculated as follows. Calculated from the formula.
【００２２】 Ｐ＝（（１／Ｃ）×（ｘ1 ／（Ｂ＋ｘ1 ）））／（ｘ2 ／（Ａ＋ｘ2 ）） すなわち、 Ｐ＝（（１／２）×（３／（２＋３）））／（３／（６＋３）） ＝０．９ となる。P = ((1 / C) × (x 1 / (B + x 1 ))) / (x 2 / (A + x 2 )) That is, P = ((1/2) × (3 / (2 + 3))) ) / (3 / (6 + 3)) = 0.9.
【００２３】また、ここで上述した実施例の比較例とし
て、取付溝４，５と、止水材，緩衝材の具体的な数値
を、坑内側となる一方の取付溝４は深さＢを２ｍｍ、地
山側となる他方の取付溝Ａは深さを６ｍｍと設定し、ま
た、緩衝材の装着状態における接合面からの突出高さｘ
1 を１ｍｍ、止水材の装着状態における接合面からの突
出高さｘ2 を３ｍｍに設定する。すなわち、止水材の高
さ（厚さ）ｘ2 ＋Ａは９ｍｍ、緩衝材の高さ（厚さ）ｘ
1 ＋Ｂは３ｍｍとされ、さらに、緩衝材の発泡倍率Ｃを
１に設定する。この場合の前述した式による比Ｐの値
は、１となる。Further, as a comparative example of the above-mentioned embodiment, the concrete values of the mounting grooves 4 and 5 and the water blocking material and the cushioning material are shown. The depth of the mounting groove A on the ground side is 2 mm and the depth is 6 mm, and the projection height x from the joint surface when the cushioning material is mounted is x
1 is set to 1 mm, and the projection height x 2 from the joint surface in the mounted state of the waterproof material is set to 3 mm. That is, the height (thickness) x 2 + A of the waterproof material is 9 mm, and the height (thickness) x of the cushioning material
1 + B is set to 3 mm, and the expansion ratio C of the cushioning material is set to 1. In this case, the value of the ratio P according to the above equation is 1.
【００２４】ところがこの比較例の止水材と緩衝材で
は、それぞれの圧縮率の比Ｐの値が１であることから、
圧縮された状態における圧縮反力については良いが、圧
縮される以前の接合面からの突出高さが、緩衝材側を小
さくしたので、セグメントの連結時に、緩衝材側の接合
面の陵部が互いに接触してしまい、従来の技術で説明し
たように、この陵部が破損してしまうおそれがある。However, in the water blocking material and the cushioning material of this comparative example, the value of the ratio P of the respective compressibility is 1, so that
The compression reaction force in the compressed state is good, but the protrusion height from the joint surface before compression was smaller on the cushioning material side, so when connecting the segments, the crest of the jointing surface on the cushioning material side As a result, they may come into contact with each other, and the ridges may be damaged as described in the related art.
【００２５】従って、上記本実施例の止水材９と緩衝材
１０との圧縮率の比Ｐが、上記式より略１であることか
ら、セグメント１を連結して目開き量Ｌを０ｍｍとした
際の、それぞれの圧縮反力が略同等となり、連結後に目
開き量Ｌが再び生じた際にも、止水材９及び緩衝材１０
の圧縮状態が大きく変化しない。Therefore, since the ratio P of the compressibility between the water blocking material 9 and the cushioning material 10 in this embodiment is approximately 1 from the above equation, the segment 1 is connected and the opening amount L is set to 0 mm. The respective compression reaction forces at the time of being made substantially equal, and even when the opening amount L is generated again after the connection, the water blocking material 9 and the cushioning material 10
The compression state of does not change significantly.
【００２６】特に、止水材９に比べて断面積の小さい緩
衝材１０の材質を、発泡ゴムにて構成したことで、クッ
ション性が増加されたこととなり、圧縮反力が止水材９
と同等となるので、すなわち、連結されたセグメント１
の接合面２，２間に再び目開き量Ｌが生じても各接合面
２，２間を略平行に間隙を発生させるようになる。なお
目開き量Ｌ発生時も、接合面２，２間にて、各止水材９
及び各緩衝材１０は、圧縮反力による復元力にて対向す
る止水材９及び緩衝材１０とが常に接触状態であり、ま
た、止水材９は水膨張性材よりなることからセグメント
１の外周側である地山側からの漏水は防止される。In particular, since the cushioning material 10 is made of foamed rubber as the material of the cushioning material 10 having a smaller cross-sectional area than that of the water blocking material 9, the cushioning property is increased, and the compression reaction force of the water blocking material 9 is increased.
Is equivalent to, that is, connected segment 1
Even if the opening amount L is again generated between the joint surfaces 2 and 2, a gap is generated between the joint surfaces 2 and 2 substantially in parallel. Even when the opening amount L is generated, each water-stopping material 9 is provided between the joint surfaces 2 and 2.
In addition, each of the cushioning materials 10 is always in contact with the water blocking material 9 and the cushioning material 10 which are opposed to each other by the restoring force due to the compression reaction force, and since the water blocking material 9 is made of the water-expandable material, the segment 1 Water leakage from the natural side, which is the outer peripheral side of the, is prevented.
【００２７】また、止水材９と緩衝材１０の圧縮される
以前の接合面２からの突出高さｘ1，ｘ2 を同一高さと
したので、セグメント１を連結する際に、各止水材９及
び各緩衝材１０が互いに対接されて締結作業を行えるの
で、対向する各接合面２が略平行状態となり、陵部が接
触することがなく破損のおそれがない。Further, since the projection heights x 1 and x 2 of the water blocking material 9 and the cushioning material 10 from the joint surface 2 before being compressed are set to be the same height, when the segments 1 are connected, each water blocking material is formed. Since the material 9 and the respective cushioning materials 10 are in contact with each other to perform the fastening work, the opposing joint surfaces 2 are in a substantially parallel state, and there is no risk of damage because the ridges do not contact.
【００２８】なお、上述した本実施例の緩衝材１０は、
発泡ゴムよりなる例について述べたが、ゴムの他に、充
填材、加硫材、補強剤、発泡剤などからなり、必要に応
じて吸水性材料より構成される構造としてもよい。The cushioning material 10 of this embodiment described above is
Although the example made of foamed rubber has been described, it may be made of a filler, a vulcanizing material, a reinforcing agent, a foaming agent, and the like in addition to rubber, and may have a structure made of a water-absorbing material as necessary.
【００２９】また、上記実施例では、止水材９及び緩衝
材１０の取付溝４，５への装着状態における接合面２か
らの突出高さｘ1 ，ｘ2 が、それぞれ３ｍｍの同一高さ
に設定した例について述べたが、この突出高さｘ1 ，ｘ
2 は、止水材９の突出高さｘ 2 に対する緩衝材１０の突
出高さｘ1 が、０．８倍から１．３倍の範囲の高さに設
定されていればよい。Further, in the above embodiment, the waterproof material 9 and the buffer
Is the joint surface 2 when the material 10 is mounted in the mounting grooves 4 and 5?
Projection height x1, X2But each has the same height of 3 mm
The example of setting to1, X
2Is the projection height x of the water stop material 9 2Of the cushioning material 10 against the
Height x1However, the height is set to 0.8 times to 1.3 times.
It should be fixed.
【００３０】さらに、上記本実施例では、止水材９と緩
衝材１０及び取付溝４，５の各数値を設定し、止水材９
と緩衝材１０とが取付溝４，５内に圧縮されて収容され
た状態における、止水材９の圧縮率に対する緩衝材１０
の圧縮率の比Ｐが上記式よりＰ＝０．９と求められる例
について述べたが、この比Ｐの値は０．６から１．２の
範囲となればいい。この場合、前述した突出高さｘ1 ，
ｘ2 、及び緩衝材１０の発泡倍率Ｃの数値が、上記範囲
内であるように設定させる。Further, in this embodiment, the numerical values of the water blocking material 9, the cushioning material 10 and the mounting grooves 4 and 5 are set, and the water blocking material 9 is set.
The cushioning material 10 with respect to the compression ratio of the water blocking material 9 in a state in which the cushioning material 10 and the cushioning material 10 are compressed and housed in the mounting grooves 4 and 5.
Although an example in which the ratio P of the compression ratios is calculated as P = 0.9 from the above formula has been described, the value of the ratio P may be in the range of 0.6 to 1.2. In this case, the above-mentioned protrusion height x 1 ,
The numerical values of x 2 and the foaming ratio C of the cushioning material 10 are set to be within the above range.
【００３１】[0031]
【発明の効果】以上説明したように本発明による土木工
事用セグメントの止水構造では、止水材と緩衝材とをセ
グメントの接合面に装着した状態における接合面からの
それぞれの突出高さを略同一高さとしたので、セグメン
ト同士を連結する際に、各止水材及び各緩衝材が互いに
対接されて締結作業を行えるので、対向する各接合面が
略平行状態となり、接合面の陵部が互いに接触すること
がなく、各セグメントの損傷を防止することができると
いう効果がある。As described above, in the water stop structure of the civil engineering segment according to the present invention, the respective projecting heights from the joint surface when the water stop material and the cushioning material are mounted on the joint surface of the segment are set. Since the heights are substantially the same, when connecting the segments, the water-stopping materials and the cushioning materials can be brought into contact with each other to perform the fastening work. Since the parts do not contact each other, there is an effect that damage to each segment can be prevented.
【００３２】また、止水材に比べて断面積の小さい緩衝
材の材質を、発泡倍率が１．３〜３．０の発泡体にて構
成したことで、クッション性が増加されたこととなり、
圧縮反力が止水材と同等とさせることが可能となり、す
なわち、連結されたセグメントの接合面間に再び目開き
量が生じても各接合面間を略平行に間隙を発生させるよ
うになり、上記同様、セグメントの陵部が接触すること
がなく破損のおそれがなくなるという効果がある。Further, since the cushioning material having a cross-sectional area smaller than that of the water blocking material is made of a foam having a foaming ratio of 1.3 to 3.0, the cushioning property is increased.
It is possible to make the compression reaction force equivalent to that of the waterproof material, that is, even if the amount of opening again occurs between the joint surfaces of the connected segments, a gap will be generated between the joint surfaces substantially in parallel. In the same manner as described above, there is an effect that there is no possibility that the crests of the segments will come into contact with each other and there is no risk of damage.
【００３３】さらに、目開き量発生時も、接合面間に
て、各止水材及び各緩衝材は、圧縮反力による復元力に
て常に対接する止水材及び緩衝材とに接触状態であるこ
とから漏水は防止されるという効果がある。Further, even when the opening amount is generated, the water blocking material and the cushioning material are in contact with the water blocking material and the cushioning material which are always in contact with each other by the restoring force due to the compression reaction force between the joint surfaces. Therefore, there is an effect that leakage is prevented.
【００３４】また、止水材と緩衝材との圧縮率の比を、
０．６から１．２の範囲としたことから、止水材と緩衝
材とは略同一の圧縮率を有することとなり、セグメント
を連結して目開き量を０ｍｍとした際の、それぞれの圧
縮反力が略同等となり、連結後に目開き量が再び生じた
際にも、止水材及び緩衝材の圧縮状態が大きく変化せ
ず、漏水のおそれがないという効果がある。In addition, the ratio of the compressibility between the water blocking material and the buffer material is
From the range of 0.6 to 1.2, the water blocking material and the cushioning material have substantially the same compression rate, and when the segments are connected to each other and the opening amount is set to 0 mm, each compression is performed. Even if the reaction forces become substantially equal and the opening amount again occurs after the connection, the compressed state of the water blocking material and the cushioning material does not change significantly, and there is an effect that there is no risk of water leakage.
【図１】本発明による土木工事用セグメントの止水構造
の一実施例を示す全体斜視図FIG. 1 is an overall perspective view showing an embodiment of a water blocking structure for a civil engineering segment according to the present invention
【図２】同実施例によるセグメントの止水構造のセグメ
ント連結状態の断面図FIG. 2 is a cross-sectional view of a segment water-stop structure according to the embodiment in a segment connected state.
【図３】同実施例によるセグメントの止水構造の概略断
面図FIG. 3 is a schematic sectional view of a water blocking structure of a segment according to the same embodiment.
１…セグメント ２…接合面 ４…一方の取付溝 ５…他方の取付溝 ９…止水材 １０…緩衝材 Ｃ…発泡倍率 Ｐ…比 ｘ1 …緩衝材の突出高さ ｘ2 …止水材の突出高さ1 ... segment 2 ... bonding surface 4 ... one of the mounting groove 5 ... other mounting groove 9 ... water stopping material 10 ... cushioning material C ... expansion ratio P ... ratio x 1 ... cushioning material projecting height x 2 ... water stopping material Protruding height
Claims (3)
セグメントの接合面の止水構造において、 前記セグメントの接合面には、長手方向に沿う一対の取
付溝が互いに並行して形成されるとともに、坑内側とな
る内側面側に沿う一方の取付溝が、地山に対接する外側
面側に沿う他方の取付溝に対し、深さが浅く、幅長が狭
い形状とされ、 前記一方の取付溝には、発泡倍率が１．３〜３のゴム弾
性を有する発泡体よりなる帯状の緩衝材が装着され、前
記他方の取付溝には、前記緩衝材より太径な帯状の止水
材が装着されるとともに、前記緩衝材及び止水材が、前
記接合面より突出して装着され、かつそれぞれの突出高
さが略同一高さとされていることを特徴とする土木工事
用セグメントの止水構造。1. In a water stop structure of a joint surface of a civil engineering segment for constructing a shield tunnel, a pair of mounting grooves along the longitudinal direction are formed in parallel with each other on the joint surface of the segment, and One mounting groove along the inner side surface that is the inner side is shallower in depth and narrower in width than the other mounting groove along the outer surface side that contacts the natural ground, and the one mounting groove is Is equipped with a band-shaped cushioning material made of foam having a rubber elasticity of 1.3 to 3 and a band-shaped waterproof material having a larger diameter than the cushioning material is mounted in the other mounting groove. In addition, the cushioning material and the water blocking material are mounted so as to project from the joint surface, and the respective projecting heights are substantially the same height.
らの各突出高さは、前記止水材の突出高さに対して、前
記緩衝材の突出高さが、０．８から１．３倍の範囲であ
ることを特徴とする請求項１記載の土木工事用セグメン
トの止水構造。2. The projecting height of the water blocking material and the cushioning material from the joint surface is 0.8 to 0.8, with respect to the projecting height of the water blocking material. The water blocking structure for a civil engineering segment according to claim 1, wherein the water blocking structure has a ratio of 1.3 times.
記取付溝内の高さに圧縮された状態における、前記止水
材の圧縮率に対する前記緩衝材の圧縮率の比が、０．６
から１．２の範囲であることを特徴とする請求項１また
は２記載の土木工事用セグメントの止水構造。3. The ratio of the compressibility of the cushioning material to the compressibility of the waterproofing material in the state where each of the water blocking material and the cushioning material is compressed to the height in the mounting groove has a ratio of 0. 6
It is the range of 1.2 to 1.2, The water stop structure of the segment for civil engineering works according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7038517A JPH08232279A (en) | 1995-02-27 | 1995-02-27 | Cutoff structure of segment for civil engineering work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7038517A JPH08232279A (en) | 1995-02-27 | 1995-02-27 | Cutoff structure of segment for civil engineering work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08232279A true JPH08232279A (en) | 1996-09-10 |
Family
ID=12527471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7038517A Pending JPH08232279A (en) | 1995-02-27 | 1995-02-27 | Cutoff structure of segment for civil engineering work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08232279A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005281478A (en) * | 2004-03-30 | 2005-10-13 | Three Bond Co Ltd | Water-expansible sealing material and precast concrete using the sealing material |
| JP2013129995A (en) * | 2011-12-21 | 2013-07-04 | C I Kasei Co Ltd | Water cut-off structure for tunnel segment, and construction method of tunnel segment |
| CN110017154A (en) * | 2019-03-29 | 2019-07-16 | 陕西铁路工程职业技术学院 | One kind is based on tunnel double-lining end construction joint construction integrated positioning fixture |
| CN110397456A (en) * | 2019-07-18 | 2019-11-01 | 中交第二公路勘察设计研究院有限公司 | A kind of seam waterproof sealing structure for adapting to duct pieces of shield tunnel and opening or misplacing |
-
1995
- 1995-02-27 JP JP7038517A patent/JPH08232279A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005281478A (en) * | 2004-03-30 | 2005-10-13 | Three Bond Co Ltd | Water-expansible sealing material and precast concrete using the sealing material |
| JP4606049B2 (en) * | 2004-03-30 | 2011-01-05 | 株式会社スリーボンド | Water-expandable sealing material and precast concrete using sealing material |
| JP2013129995A (en) * | 2011-12-21 | 2013-07-04 | C I Kasei Co Ltd | Water cut-off structure for tunnel segment, and construction method of tunnel segment |
| CN110017154A (en) * | 2019-03-29 | 2019-07-16 | 陕西铁路工程职业技术学院 | One kind is based on tunnel double-lining end construction joint construction integrated positioning fixture |
| CN110397456A (en) * | 2019-07-18 | 2019-11-01 | 中交第二公路勘察设计研究院有限公司 | A kind of seam waterproof sealing structure for adapting to duct pieces of shield tunnel and opening or misplacing |
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