JP2020143545A - Sealing structure for steel pipe sheet pile joint - Google Patents
Sealing structure for steel pipe sheet pile joint Download PDFInfo
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- JP2020143545A JP2020143545A JP2019042399A JP2019042399A JP2020143545A JP 2020143545 A JP2020143545 A JP 2020143545A JP 2019042399 A JP2019042399 A JP 2019042399A JP 2019042399 A JP2019042399 A JP 2019042399A JP 2020143545 A JP2020143545 A JP 2020143545A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 167
- 239000010959 steel Substances 0.000 title claims abstract description 167
- 238000007789 sealing Methods 0.000 title abstract 4
- 239000013013 elastic material Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 144
- 230000000903 blocking effect Effects 0.000 claims description 59
- 238000010276 construction Methods 0.000 abstract description 13
- 239000003566 sealing material Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 32
- 239000004576 sand Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- 239000002689 soil Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229920003051 synthetic elastomer Polymers 0.000 description 4
- 239000005061 synthetic rubber Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
Description
本発明は、鋼管矢板継手部の止水構造に関する。 The present invention relates to a water blocking structure of a steel pipe sheet pile joint.
従来から、鋼管矢板、鋼矢板などの鋼製矢板は、護岸工事や埋立工事における遮水護岸構造に用いられ、特に廃棄物の埋立処分場などの工事においては、埋立地内の廃棄物汚染物質が鋼製矢板の継手部分を通じて外海に漏出してしまうことがないよう高い遮水性能が要求されている。 Conventionally, steel sheet piles such as steel pipe sheet piles and steel sheet piles have been used for impermeable revetment structures in revetment work and landfill work, and especially in construction such as landfill disposal sites, waste pollutants in landfills are used. High impermeable performance is required so that it does not leak to the open sea through the joint part of the steel sheet pile.
例えば、図１４には特許文献１に開示された鋼管矢板の継手構造が図示されている。当該継手構造の実施例では、所謂「Ｐ−Ｔ継手」による実施の態様が記載されており、図１４（ａ）に示されるように、鋼管本体２ａに設けられたＣ字状継手部材４のスリット９に、Ｃ字状継手部材４内への土砂の浸入を抑えるため、薄ゴムなどからなる閉塞部材１０を設置して打設現場にて鋼管本体２ａが打設されるように構成されている。 For example, FIG. 14 shows a joint structure of a steel pipe sheet pile disclosed in Patent Document 1. In the embodiment of the joint structure, an embodiment using a so-called “PT joint” is described, and as shown in FIG. 14A, the C-shaped joint member 4 provided on the steel pipe body 2a In order to suppress the intrusion of earth and sand into the C-shaped joint member 4 in the slit 9, a closing member 10 made of thin rubber or the like is installed so that the steel pipe body 2a is cast at the casting site. There is.
その後、図１４（ｂ）に示されるように、後行の鋼管本体２ａの打設に伴ってＴ字状継手部材５の柱部１１が閉塞部材１０を破断しながらスリット９を介してＴ字状継手部材５とＣ字状継手部材４とが嵌合されるように構成されている。 After that, as shown in FIG. 14B, the pillar portion 11 of the T-shaped joint member 5 breaks the closing member 10 and T-shapes through the slit 9 as the steel pipe main body 2a is driven. The shaped joint member 5 and the C-shaped joint member 4 are configured to be fitted together.
また、図１５には特許文献２に開示された鋼管矢板の継手構造が図示されている。当該継手構造の実施例では、所謂「Ｐ−Ｐ継手」による実施の態様が記載されており、図１５（ａ）、（ｂ）に示されるように、鋼管矢板１に設けられた継手管２のスリット側端部に、コ字形の固定金物２３を嵌め、継手管２を貫通する固定ボルト２５によって合成ゴム製止水板２１、２２が取り付けられている。 Further, FIG. 15 shows a joint structure of a steel pipe sheet pile disclosed in Patent Document 2. In the embodiment of the joint structure, the embodiment by the so-called "PP joint" is described, and as shown in FIGS. 15A and 15B, the joint pipe 2 provided on the steel pipe sheet pile 1 is described. A U-shaped fixing metal fitting 23 is fitted in the slit side end portion of the above, and synthetic rubber water blocking plates 21 and 22 are attached by a fixing bolt 25 penetrating the joint pipe 2.
そして、嵌合する相手側の継手管２の外周面に上記合成ゴム製止水板２１、２２を当接させ、２枚の合成ゴム製止水板２１、２２と継手管２に囲われた略三角形状の空間に、図１５（ｃ）に示されるように硬化性充填材３０（モルタル、薬液固化材等）を充填して継手部分の止水性を確保している。 Then, the synthetic rubber water stop plates 21 and 22 were brought into contact with the outer peripheral surface of the mating mating joint pipe 2 and surrounded by the two synthetic rubber water stop plates 21 and 22 and the joint pipe 2. As shown in FIG. 15C, a substantially triangular space is filled with a curable filler 30 (mortar, chemical solidifying material, etc.) to ensure water stoppage of the joint portion.
しかし、上記特許文献１に記載された発明では、スリット９を覆う閉塞部材１０をＣ字状継手部材４に接着しておき、Ｔ字状継手部材５の打設時に当該閉塞部材１０を切断することになるが、鋼管本体２ａは必ずしも鉛直かつ真っすぐに施工現場において打設されるわけではないため、Ｔ字状継手部材５のウェブ部と閉塞部材１０の裂け目とが密着せずに隙間ができてしまう。 However, in the invention described in Patent Document 1, the closing member 10 covering the slit 9 is adhered to the C-shaped joint member 4, and the closing member 10 is cut when the T-shaped joint member 5 is driven. However, since the steel pipe body 2a is not necessarily placed vertically and straight at the construction site, a gap is formed without the web portion of the T-shaped joint member 5 and the crevice of the closing member 10 coming into close contact with each other. Will end up.
そうすると、Ｔ字状継手部材５の打設中、閉塞部材１０の裂け目からＣ字状継手部材４の内部に土砂等が侵入してしまうため、Ｃ字状継手部材４内に遮水材を充填する際には、当該Ｃ字状継手部材４内の土砂等の除去・清掃が必要になるという問題がある。 Then, during the driving of the T-shaped joint member 5, earth and sand or the like intrudes into the C-shaped joint member 4 from the crevice of the closing member 10, so that the C-shaped joint member 4 is filled with a water-shielding material. At that time, there is a problem that it is necessary to remove and clean the earth and sand in the C-shaped joint member 4.
また、上記特許文献２に記載された発明では、図示されるように合成ゴム製止水板２１、２２を継手管２に多数の固定ボルト２５で固定する繁雑な手間が発生する。 Further, in the invention described in Patent Document 2, as shown in the drawing, complicated labor for fixing the synthetic rubber water stop plates 21 and 22 to the joint pipe 2 with a large number of fixing bolts 25 occurs.
また、特許文献２に記載された発明は、後行の継手管２の打設時に、先行の継手管２に取り付けられた２枚の止水板２１、２２が後行の継手管２の外周面に密着するよう構成されたものである。しかし、先行の継手管２の打設時に当該継手管２のスリットから管内部に土砂等が侵入することを防ぐようには構成されていないため、先行の継手管２の打設後に継手管２内部の土砂等の除去・清掃が必要になるという問題がある。 Further, in the invention described in Patent Document 2, when the trailing joint pipe 2 is driven, the two water blocking plates 21 and 22 attached to the preceding joint pipe 2 form the outer circumference of the trailing joint pipe 2. It is configured to be in close contact with the surface. However, since it is not configured to prevent earth and sand from entering the inside of the pipe through the slit of the joint pipe 2 when the preceding joint pipe 2 is driven, the joint pipe 2 is not configured after the preceding joint pipe 2 is placed. There is a problem that it is necessary to remove and clean the internal earth and sand.
そこで、本願発明は、施工手間を軽減しつつ、鋼管矢板継手部の止水性能を向上することが可能な、鋼管矢板継手部の止水構造を提供することを目的とする。 Therefore, an object of the present invention is to provide a water-stopping structure for a steel pipe sheet pile joint, which can improve the water-stopping performance of the steel pipe sheet pile joint while reducing the construction work.
（１）スリット（５１）を有する鋼管継手（５０）と、弾性を有する素材により一体成形されて成るとともに、前記スリット（５１）における互いに対向する二つのスリット端部（５２）にそれぞれ設けられる弾性止水部材（３０）と、を有し、前記弾性止水部材（３０）は、前記スリット端部（５２）を弾性力によって挟持する継手挟持部（３１）と、前記継手挟持部（３１）から延設されるとともに、前記スリット（５１）を閉塞する継手スリット閉塞部（３２）と、を備えたことを特徴とする鋼管矢板継手部（１００）の止水構造。 (1) The steel pipe joint (50) having a slit (51) is integrally molded with an elastic material, and the elasticity provided at each of the two slit ends (52) facing each other in the slit (51). The elastic water stop member (30) has a water stop member (30), and the elastic water stop member (30) has a joint holding portion (31) that holds the slit end portion (52) by an elastic force, and the joint holding portion (31). A water-stop structure of a steel pipe sheet pile joint portion (100), which is provided with a joint slit closing portion (32) for closing the slit (51).
上記（１）の構成によれば、弾性を有する素材により一体成形された弾性止水部材（３０）が、鋼管継手（５０）のスリット端部（５２）を弾性力によってしっかりと挟持するので、従来のような専用の取付金具や固定ボルトを使用することなく、取り付け手間を大幅に削減することが可能となる。 According to the configuration of (1) above, the elastic water blocking member (30) integrally formed of an elastic material firmly holds the slit end (52) of the steel pipe joint (50) by elastic force. It is possible to significantly reduce the time and effort required for mounting without using a dedicated mounting bracket or fixing bolt as in the past.
さらに、一体成形された継手スリット閉塞部（３２）によって、鋼管継手（５０）のスリット（５１）が閉塞されるので、先行して打設される鋼管継手（５０）内部への土砂等の浸入を抑制することができ、例えば、鋼管継手（５０）内への遮水材充填作業に際し、事前の鋼管継手（５０）内の土砂等の除去・清掃を省くことが可能となる。 Further, since the slit (51) of the steel pipe joint (50) is closed by the integrally molded joint slit closing portion (32), earth and sand or the like penetrate into the steel pipe joint (50) to be driven in advance. For example, when filling the steel pipe joint (50) with a water-impervious material, it is possible to omit the removal and cleaning of earth and sand in the steel pipe joint (50) in advance.
さらに、後行の継手と嵌合すると、弾性止水部材（３０）の継手スリット閉塞部（３２）は、後行の継手に当接（特に図３、４等参照）して止水性能を発揮することから、鋼管継手（５０）内へ充填された遮水材とともに長期的な止水性能の向上を図ることが可能となる。 Further, when fitted with the trailing joint, the joint slit closing portion (32) of the elastic water blocking member (30) abuts on the trailing joint (particularly, see FIGS. 3 and 4) to improve the water stopping performance. Since it is exhibited, it is possible to improve the long-term water stopping performance together with the water-shielding material filled in the steel pipe joint (50).
（２）前記継手挟持部（３１）は、前記スリット端部（５２）が挿入される継手挟持凹部（３１３）が形成され、当該継手挟持凹部（３１３）に挿入された前記スリット端部（５２）の外側面に当接する外側挟持片（３１１）と、前記スリット端部（５２）の内側面に当接する内側挟持片（３１２）とが形成される上記（１）に記載の鋼管矢板継手部（１００）の止水構造。 (2) The joint holding portion (31) is formed with a joint holding recess (313) into which the slit end (52) is inserted, and the slit end (52) inserted into the joint holding recess (313). The steel pipe sheet pile joint portion according to (1) above, wherein an outer holding piece (311) that abuts on the outer surface of (1) and an inner holding piece (312) that abuts on the inner side surface of the slit end (52) are formed. (100) Waterproof structure.
上記（２）の構成によれば、上記（１）の構成によって得られる効果に加え、弾性止水部材（３０）の弾性力によって、外側挟持片（３１１）及び内側挟持片（３１２）がスリット端部（５２）の外側面及び内側面にしっかりと密接するので、高い止水性が確保されるとともに、鋼管継手（５０）を打設する際に、弾性止水部材（３０）がスリット端部（５２）から外れることを防いでいる。 According to the configuration of the above (2), in addition to the effect obtained by the configuration of the above (1), the outer holding piece (311) and the inner holding piece (312) are slit by the elastic force of the elastic water blocking member (30). Since it is firmly in close contact with the outer and inner surfaces of the end portion (52), high water stopping property is ensured, and when the steel pipe joint (50) is placed, the elastic water stopping member (30) is at the slit end portion. It prevents it from coming off from (52).
（３）前記継手スリット閉塞部（３２）は、前記鋼管継手（５０）の外側で前記スリット（５１）を閉塞する外側スリット閉塞片（３２１）と、前記鋼管継手（５０）の内側で前記スリット（５１）を閉塞する内側スリット閉塞片（３２２）と、から成る上記（１）または（２）に記載の鋼管矢板継手部（１００）の止水構造。 (3) The joint slit closing portion (32) includes an outer slit closing piece (321) that closes the slit (51) outside the steel pipe joint (50) and the slit inside the steel pipe joint (50). The water-stop structure of the steel pipe sheet pile joint portion (100) according to the above (1) or (2), which comprises an inner slit closing piece (322) that closes (51).
上記（３）の構成によれば、上記（１）、（２）の構成によって得られる効果に加え、例えば、図３の断面図に示されるように、鋼管継手（５０）の内部と外部との間に２重の止水構造を形成することが可能となる。すなわち、Ｔ型継手（１１０）の打設中から打設後の長期間において、弾性止水部材（３０）の外側スリット閉塞片（３２１）と内側スリット閉塞片（３２２）がＴ型継手（１１０）のウェブ部（４０）にしっかりと密接し、鋼管継手（５０）の内部への土砂や水の浸入を防ぐことができ、極めて止水性能の高い継手構造を実現することが可能となる。 According to the configuration of (3) above, in addition to the effects obtained by the configurations of (1) and (2) above, for example, as shown in the cross-sectional view of FIG. 3, the inside and outside of the steel pipe joint (50) It is possible to form a double waterproof structure between the two. That is, the outer slit closing piece (321) and the inner slit closing piece (322) of the elastic water blocking member (30) are the T-shaped joint (110) during the long period after the T-shaped joint (110) is placed. ), It is possible to prevent the intrusion of earth and sand and water into the inside of the steel pipe joint (50) by firmly adhering to the web portion (40), and it is possible to realize a joint structure having extremely high water stopping performance.
（４）互いに対向する前記継手スリット閉塞部（３２）が、弾性を有する素材を介して一体成形されて成る上記（１）〜（３）のいずれかに記載の鋼管矢板継手部（１００）の止水構造。 (4) The steel pipe sheet pile joint portion (100) according to any one of (1) to (3) above, wherein the joint slit closing portions (32) facing each other are integrally molded via an elastic material. Water-stop structure.
上記（４）の構成によれば、上記（１）〜（３）のいずれかの構成によって得られる効果に加え、例えば、図１０の断面図に示されるように弾性止水部材（３０）を一体化することにより、スリット端部（５２）への取り付け工程を省力化できるとともに、鋼管継手（５０）の打設中、スリット端部（５２）から弾性止水部材（３０）が容易に外れないようにすることが可能となる。 According to the configuration of (4) above, in addition to the effect obtained by any of the configurations (1) to (3) above, for example, the elastic water blocking member (30) is provided as shown in the cross-sectional view of FIG. By integrating, the labor for attaching to the slit end (52) can be saved, and the elastic water stop member (30) can be easily removed from the slit end (52) during the driving of the steel pipe joint (50). It is possible to prevent it.
さらに、鋼管継手（５０）のスリット（５１）から、当該鋼管継手（５０）の内部への土砂や水の浸入をより確実に防ぐことが可能となる。 Further, it is possible to more reliably prevent the intrusion of earth and sand or water into the inside of the steel pipe joint (50) through the slit (51) of the steel pipe joint (50).
（５）前記継手スリット閉塞部（３２）は、中空環状に形成されるとともに、互いに対向する二つの前記スリット端部（５２）の間で前記スリット（５１）を閉塞する上記（１）または（２）に記載の鋼管矢板継手部（１００）の止水構造。 (5) The joint slit closing portion (32) is formed in a hollow annular shape, and the slit (51) is closed between the two slit end portions (52) facing each other (1) or ( The water-stop structure of the steel pipe sheet pile joint portion (100) according to 2).
上記（５）の構成によれば、上記（１）または（２）の構成によって得られる効果に加え、例えば、図８の断面図に示されるように、Ｔ型継手（１１０）のウェブ部（４０）に継手スリット閉塞部（３２）が広い接触面で密接するため、先行して打設される鋼管継手（５０）内部への土砂等の浸入を抑制することができるだけでなく、長期的な止水性能の向上を図ることが可能となる。 According to the configuration of (5) above, in addition to the effect obtained by the configuration of (1) or (2) above, for example, as shown in the cross-sectional view of FIG. 8, the web portion of the T-shaped joint (110) ( Since the joint slit closing portion (32) is in close contact with the 40) on a wide contact surface, it is possible not only to suppress the intrusion of earth and sand into the steel pipe joint (50) to be driven in advance, but also for a long period of time. It is possible to improve the water stopping performance.
以下、図面を参照しつつ、本発明の鋼管矢板継手部の止水構造について説明する。 Hereinafter, the water blocking structure of the steel pipe sheet pile joint portion of the present invention will be described with reference to the drawings.
本発明の一実施例として、図１には本実施例における鋼管矢板継手部１００の断面図が図示されている。本実施例では鋼管矢板２０に形成された鋼管継手５０のスリット５１に、図示される態様で弾性止水部材３０が設けられることを特徴としている。 As an embodiment of the present invention, FIG. 1 shows a cross-sectional view of the steel pipe sheet pile joint portion 100 in the present embodiment. The present embodiment is characterized in that the elastic water stop member 30 is provided in the slit 51 of the steel pipe joint 50 formed in the steel pipe sheet pile 20 in the manner shown in the drawing.
すなわち、図１に示される鋼管矢板２０及び鋼管継手５０を施工現場において先行して打設する際、スリット５１を介して鋼管継手５０の内部に土砂等が侵入することが問題となるが、鋼管継手５０のスリット端部５２を挟持するように本発明の弾性止水部材３０を設けることで、鋼管継手５０の内部に土砂等が侵入することを防いでいる。 That is, when the steel pipe sheet pile 20 and the steel pipe joint 50 shown in FIG. 1 are driven in advance at the construction site, there is a problem that earth and sand or the like invade the inside of the steel pipe joint 50 through the slit 51. By providing the elastic water blocking member 30 of the present invention so as to sandwich the slit end portion 52 of the joint 50, it is possible to prevent earth and sand from entering the inside of the steel pipe joint 50.
なお、本実施例におけるＰ型継手１２０の鋼管継手５０は、外径１６５．２ｍｍ、厚さ９ｍｍの円形形状の鋼管が使用され、後述するＴ型継手１１０のウェブ部４０が挿通される箇所には、幅３０±５ｍｍのスリット５１が形成されている。 As the steel pipe joint 50 of the P-shaped joint 120 in this embodiment, a circular steel pipe having an outer diameter of 165.2 mm and a thickness of 9 mm is used, and the web portion 40 of the T-shaped joint 110, which will be described later, is inserted in the steel pipe joint 50. Is formed with a slit 51 having a width of 30 ± 5 mm.
続いて、図２には本発明の弾性止水部材３０の断面図及び斜視図が示されている。図示されるように、本実施例における弾性止水部材３０は、ゴム素材などの弾性を有する材料によって一体成形された部材であり、鋼管継手５０のスリット端部５２を挟持するための継手挟持部３１が形成され、当該継手挟持部３１には、鋼管継手５０のスリット端部５２が挿入される継手挟持凹部３１３と、当該継手挟持凹部３１３を囲む外側挟持片３１１及び内側挟持片３１２が形成されている。 Subsequently, FIG. 2 shows a cross-sectional view and a perspective view of the elastic water blocking member 30 of the present invention. As shown in the figure, the elastic water blocking member 30 in this embodiment is a member integrally formed of an elastic material such as a rubber material, and is a joint holding portion for holding the slit end portion 52 of the steel pipe joint 50. 31 is formed, and the joint holding portion 31 is formed with a joint holding recess 313 into which the slit end 52 of the steel pipe joint 50 is inserted, and an outer holding piece 311 and an inner holding piece 312 surrounding the joint holding recess 313. ing.
図２に示されるように、外側挟持片３１１及び内側挟持片３１２は、鋼管継手５０のスリット端部５２が継手挟持凹部３１３に挿入されると、しっかり鋼管継手５０の外側面及び内側面に密接するように、鋼管継手５０の曲率に略応じた形状で成形されるとともに、継手挟持凹部３１３の形状が先細となるように形成されている。 As shown in FIG. 2, the outer holding piece 311 and the inner holding piece 312 are firmly in close contact with the outer surface and the inner surface of the steel pipe joint 50 when the slit end 52 of the steel pipe joint 50 is inserted into the joint holding recess 313. As described above, the steel pipe joint 50 is formed in a shape substantially corresponding to the curvature of the steel pipe joint 50, and the shape of the joint holding recess 313 is formed to be tapered.
さらに、外側挟持片３１１の長さを内側挟持片３１２よりも長く形成することより、鋼管継手５０の外側面にしっかり外側挟持片３１１を密接させ、鋼管継手５０の打設中に生じる土圧や水圧によって弾性止水部材３０が外れることを防いでいる。 Further, by forming the length of the outer holding piece 311 longer than that of the inner holding piece 312, the outer holding piece 311 is firmly brought into close contact with the outer surface of the steel pipe joint 50, and the earth pressure generated during the driving of the steel pipe joint 50 is increased. It prevents the elastic water blocking member 30 from coming off due to water pressure.
また、図２に示されるように、弾性止水部材３０には継手スリット閉塞部３２が形成されており、外側挟持片３１１からは外側スリット閉塞片３２１が、内側挟持片３１２からは内側スリット閉塞片３２２が形成されている。これにより、スリット５１を介して鋼管継手５０内部への土砂や水等の浸入を防ぐことが可能となっている。 Further, as shown in FIG. 2, the elastic water stop member 30 is formed with a joint slit closing portion 32, the outer slit closing piece 321 from the outer holding piece 311 and the inner slit closing from the inner holding piece 312. One piece 322 is formed. This makes it possible to prevent sediment, water, etc. from entering the inside of the steel pipe joint 50 through the slit 51.
なお、図２（ｂ）に示されるように、本発明の弾性止水部材３０は必要長さに一体成形されている。弾性止水部材３０は、適宜、その長さを設定することが可能であり、鋼管継手５０の延長方向に弾性止水部材３０を継ぎ足す場合は、適宜、接着剤による方法や、加硫接着による方法等により、弾性止水部材３０の端部同士を接続することが可能である。また、弾性止水部材３０を鋼管継手５０のスリット端部５２に装着する際、上端側になる端部を事前に斜めにカットしておき、先行の鋼管継手５０と後行のＴ型継手１１０とがスムーズに嵌合できるようにすることが好ましい。 As shown in FIG. 2B, the elastic water blocking member 30 of the present invention is integrally molded to a required length. The length of the elastic water stop member 30 can be set as appropriate, and when the elastic water stop member 30 is added in the extension direction of the steel pipe joint 50, an adhesive method or vulcanization adhesion is appropriately performed. It is possible to connect the ends of the elastic water blocking members 30 to each other by the method according to the above. Further, when the elastic water blocking member 30 is attached to the slit end portion 52 of the steel pipe joint 50, the end portion on the upper end side is cut diagonally in advance, and the preceding steel pipe joint 50 and the succeeding T-shaped joint 110 are cut. It is preferable that and can be smoothly fitted.
続いて、図３には本実施例におけるＰ−Ｔ継手の鋼管矢板継手部１００の断面図が示されている。すなわち、図１の断面図に示されるように、鋼管継手５０のスリット端部５２に本発明の弾性止水部材３０が取り付けられ、先行して鋼管矢板２０と一体化した鋼管継手５０が施工現場において打設された後、後行の鋼管矢板２０と一体化したＴ型継手１１０が図３に示される態様で打設されて先行の鋼管継手５０と嵌合する。 Subsequently, FIG. 3 shows a cross-sectional view of the steel pipe sheet pile joint portion 100 of the PT joint in this embodiment. That is, as shown in the cross-sectional view of FIG. 1, the elastic water blocking member 30 of the present invention is attached to the slit end 52 of the steel pipe joint 50, and the steel pipe joint 50 integrated with the steel pipe sheet pile 20 in advance is installed at the construction site. After being driven in, the T-shaped joint 110 integrated with the succeeding steel pipe sheet pile 20 is driven in the manner shown in FIG. 3 and fitted with the preceding steel pipe joint 50.
より詳細に説明すると、後行の鋼管矢板２０と一体化したＴ型継手１１０が打設されると、Ｔ型継手１１０のウェブ部４０がスリット５１に挿入され、図３等に示されるように、弾性止水部材３０の外側スリット閉塞片３２１と内側スリット閉塞片３２２が、Ｔ型継手１１０のウェブ部４０にしっかりと密接し、鋼管継手５０の内部と外部との間に２重の止水構造を形成することが可能となっている。 More specifically, when the T-shaped joint 110 integrated with the subsequent steel pipe sheet pile 20 is driven, the web portion 40 of the T-shaped joint 110 is inserted into the slit 51, as shown in FIG. The outer slit closing piece 321 and the inner slit closing piece 322 of the elastic water blocking member 30 are firmly in close contact with the web portion 40 of the T-shaped joint 110, and the double water stopping piece is provided between the inside and the outside of the steel pipe joint 50. It is possible to form a structure.
このような構成によれば、Ｔ型継手１１０の打設中から打設後の長期間に亘り、鋼管継手５０の内部への土砂や水の浸入を防ぐことができ、極めて止水性能の高い継手構造を実現することができる。 According to such a configuration, it is possible to prevent the intrusion of earth and sand and water into the inside of the steel pipe joint 50 from the time of placing the T-shaped joint 110 to the period after the placement, and the water stopping performance is extremely high. A joint structure can be realized.
なお、本実施例におけるＴ型継手１１０は、ウェブ幅７６ｍｍ、フランジ幅８５ｍｍ、厚さ９ｍｍの寸法を有し、図３に図示されるように左側の後行の鋼管矢板２０に溶接接合にて取り付けられている。 The T-shaped joint 110 in this embodiment has dimensions of a web width of 76 mm, a flange width of 85 mm, and a thickness of 9 mm, and is welded to the trailing steel pipe sheet pile 20 on the left side as shown in FIG. It is attached.
また、本発明の弾性止水部材３０は、前述のＰ−Ｔ継手に限らず、図４に示されるように所謂Ｐ−Ｐ継手による鋼管矢板継手部１００にも適用することが可能である。図示される実施例では、先行して打設されるＰ型継手１２０の鋼管継手５０のスリット端部５２１及び５２２に、それぞれ弾性止水部材３０Ｃ及び３０Ｄが取り付けられ、後行打設されるＰ型継手１２０の鋼管継手５０のスリット端部５２１及び５２２に、それぞれ弾性止水部材３０Ａ及び３０Ｂが取り付けられている。 Further, the elastic water blocking member 30 of the present invention can be applied not only to the above-mentioned PT joint but also to the steel pipe sheet pile joint portion 100 having a so-called PP joint as shown in FIG. In the illustrated embodiment, the elastic water stop members 30C and 30D are attached to the slit ends 521 and 522 of the steel pipe joint 50 of the P-type joint 120 to be driven in advance, and the P-type joint 120 is driven later. Elastic water stop members 30A and 30B are attached to the slit ends 521 and 522 of the steel pipe joint 50 of the mold joint 120, respectively.
［施工手順］
以下では、上記した本実施例におけるＰ−Ｔ継手（図３の断面図参照）の施工手順について、図５に示される施工フローにもとづいて説明する。
[Construction procedure]
Hereinafter, the construction procedure of the PT joint (see the cross-sectional view of FIG. 3) in the present embodiment described above will be described based on the construction flow shown in FIG.
（Ｓ１００：Ｐ型継手１２０への弾性止水部材３０の設置）
まず、現場における鋼管矢板２０の先行打設作業に先立って、図１に示されるような態様で鋼管継手５０のスリット端部５２に弾性止水部材３０を取り付ける。
(S100: Installation of elastic water stop member 30 on P-type joint 120)
First, prior to the pre-placing work of the steel pipe sheet pile 20 at the site, the elastic water stop member 30 is attached to the slit end 52 of the steel pipe joint 50 in the manner shown in FIG.
当該弾性止水部材３０の設置区間としては、鋼管継手５０の全延長にわたって設置しても構わないが、鋼管矢板継手部１００の止水性能を確保する観点からすると、水中部にあたる区間のみに弾性止水部材３０を設置してもよく、その際、海底地盤の起伏を考慮し、土中に１ｍ程度入り込むように弾性止水部材３０を長めに設置することが好ましい。 The elastic water blocking member 30 may be installed over the entire extension of the steel pipe joint 50, but from the viewpoint of ensuring the water stopping performance of the steel pipe sheet pile joint portion 100, it is elastic only in the section corresponding to the underwater portion. The water stop member 30 may be installed, and at that time, it is preferable to install the elastic water stop member 30 longer so as to enter the soil by about 1 m in consideration of the undulations of the seabed ground.
また、本実施例では必要長さを有する弾性止水部材３０を鋼管継手５０の下端側又は上端側から順次装着し、鋼管継手５０のスリット端部５２を弾性止水部材３０の有する弾性力によって挟持させている。 Further, in this embodiment, the elastic water blocking member 30 having the required length is sequentially mounted from the lower end side or the upper end side of the steel pipe joint 50, and the slit end portion 52 of the steel pipe joint 50 is subjected to the elastic force of the elastic water stopping member 30. I'm holding it.
（Ｓ１１０：鋼管継手５０内への遮水材設置及び鋼管矢板２０の打設）
鋼管継手５０への弾性止水部材３０の設置後、本実施例では土中部にあたる部分に対応する鋼管継手５０の内部に、遮水材入り袋（図示しない）を設置している。このような構成によれば、土中部にあたる鋼管継手５０に弾性止水部材３０を設置することなく鋼管継手５０内部への土砂等の浸入を防ぐことが可能となる。その後、打設現場において先行の鋼管矢板２０と一体化した鋼管継手５０を打設する。
(S110: Installation of water-impervious material in steel pipe joint 50 and placement of steel pipe sheet pile 20)
After the elastic water blocking member 30 is installed in the steel pipe joint 50, in this embodiment, a bag (not shown) containing a water-impervious material is installed inside the steel pipe joint 50 corresponding to the portion corresponding to the soil. According to such a configuration, it is possible to prevent the intrusion of earth and sand or the like into the inside of the steel pipe joint 50 without installing the elastic water blocking member 30 in the steel pipe joint 50 corresponding to the underground portion. After that, the steel pipe joint 50 integrated with the preceding steel pipe sheet pile 20 is driven at the driving site.
なお、本実施例では、上記したように土中部の鋼管継手５０にのみ遮水材入り袋を設置して先行の鋼管矢板２０と一体化した鋼管継手５０を打設しているが、水中部の鋼管継手５０内にも遮水材入り袋を設置してもよく、これにより、弾性止水部材３０が水圧他の要因によって鋼管継手５０内へ変形してしまうことを防止することが可能となるとともに、より確実に土砂等の鋼管継手５０内への侵入を防ぐことが可能となる。 In this embodiment, as described above, the water-shielding material-containing bag is installed only in the steel pipe joint 50 in the soil, and the steel pipe joint 50 integrated with the preceding steel pipe sheet pile 20 is placed. A bag containing a water-impervious material may be installed in the steel pipe joint 50 of the above, which makes it possible to prevent the elastic water blocking member 30 from being deformed into the steel pipe joint 50 due to water pressure or other factors. At the same time, it is possible to more reliably prevent earth and sand from entering the steel pipe joint 50.
また、鋼管継手５０の内部に遮水材入り袋等の設置を行わない場合は、鋼管継手５０の底部に土砂の侵入を防ぐ閉塞板（図示しない）を設置することで、鋼管矢板２０の打設に伴う鋼管継手５０内部への土砂等の浸入を防止することが可能となる。 If a bag containing a water-impervious material is not installed inside the steel pipe joint 50, a closing plate (not shown) that prevents the intrusion of earth and sand is installed at the bottom of the steel pipe joint 50 to hit the steel pipe sheet pile 20. It is possible to prevent the intrusion of earth and sand into the inside of the steel pipe joint 50 due to the installation.
以上のように、弾性止水部材３０によって、打設に伴うスリット５１からの土砂等の侵入を防ぐことが可能となるため、従来行われていたような鋼管継手５０内の洗浄作業が不要となり、工期短縮と工費低減を図ることが可能となるとともに、鋼管矢板継手部１００全体の止水性能を向上させることが可能となる。 As described above, the elastic water stop member 30 makes it possible to prevent the intrusion of earth and sand from the slit 51 due to the casting, so that the cleaning work inside the steel pipe joint 50, which has been conventionally performed, becomes unnecessary. It is possible to shorten the construction period and reduce the construction cost, and it is possible to improve the water stopping performance of the entire steel pipe sheet pile joint portion 100.
（Ｓ１２０：後行の鋼管矢板２０の打設及びＴ型継手１１０とＰ型継手１２０の嵌合）
続いて、後行の鋼管矢板２０と一体化したＴ型継手１１０を打設しつつ、Ｔ型継手１１０のウェブ部４０を図３に示されるように、互いに向かい合う弾性止水部材３０の間のスリット５１に挿入し、Ｔ型継手１１０とＰ型継手１２０とを嵌合させる。
(S120: Placing the trailing steel pipe sheet pile 20 and fitting the T-type joint 110 and the P-type joint 120)
Subsequently, while driving the T-shaped joint 110 integrated with the subsequent steel pipe sheet pile 20, the web portion 40 of the T-shaped joint 110 is placed between the elastic water blocking members 30 facing each other as shown in FIG. It is inserted into the slit 51 to fit the T-shaped joint 110 and the P-shaped joint 120.
本発明の弾性止水部材３０は弾性を有するため、打設中も常に外側スリット閉塞片３２１と内側スリット閉塞片３２２とがＴ型継手１１０のウェブ部４０に密接し、鋼管継手５０の内側と外側とで２重の止水構造を形成している。これにより、後行の鋼管矢板２０と一体化したＴ型継手１１０の打設中においても、確実に鋼管継手５０の内部への土砂等の侵入を防ぐことが可能となっている。 Since the elastic water blocking member 30 of the present invention has elasticity, the outer slit closing piece 321 and the inner slit closing piece 322 are always in close contact with the web portion 40 of the T-shaped joint 110 even during casting, and are in close contact with the inside of the steel pipe joint 50. A double waterproof structure is formed on the outside. As a result, it is possible to reliably prevent the intrusion of earth and sand into the inside of the steel pipe joint 50 even during the placement of the T-shaped joint 110 integrated with the steel pipe sheet pile 20 that follows.
なお、弾性止水部材３０の間のスリット５１に、Ｔ型継手１１０のウェブ部４０が挿入されるとき、弾性止水部材３０の外側スリット閉塞片３２１及び内側スリット閉塞片３２２と、Ｔ型継手１１０のウェブ部４０との摩擦によって、弾性止水部材３０がスリット端部５２から外れてしまうことを防ぐために、スリット端部５２と、弾性止水部材３０の継手挟持凹部３１３との間に適切な接着剤等を塗布することも可能である。 When the web portion 40 of the T-shaped joint 110 is inserted into the slit 51 between the elastic water blocking members 30, the outer slit closing piece 321 and the inner slit closing piece 322 of the elastic water stopping member 30 and the T-shaped joint Appropriately between the slit end 52 and the joint holding recess 313 of the elastic water stop member 30 in order to prevent the elastic water stop member 30 from coming off from the slit end 52 due to friction with the web portion 40 of the 110. It is also possible to apply a suitable adhesive or the like.
（Ｓ１３０：Ｐ型継手１２０内への遮水材の充填）
後行の鋼管矢板２０の打設が完了すると、続いて、鋼管継手５０の内部に遮水材の充填を行う。本実施例では、土質系遮水材のうち長期的遮水性能に優れた砂質土系の変形追随性遮水材をＰ型継手１２０の鋼管継手５０内に充填しているため、弾性止水部材３０による止水性能と、変形追随性遮水材による高い遮水性能により、従来の止水構造に比べ、長期的に高い止水性能を得ることが可能となっている。
(S130: Filling the P-shaped joint 120 with a water-shielding material)
When the placement of the subsequent steel pipe sheet pile 20 is completed, the inside of the steel pipe joint 50 is subsequently filled with a water-shielding material. In this embodiment, the steel pipe joint 50 of the P-type joint 120 is filled with a sandy soil-based deformation-following water-impervious material having excellent long-term water-impervious performance among the soil-based water-impervious materials. Due to the water blocking performance of the water member 30 and the high water blocking performance of the deformation-following water blocking material, it is possible to obtain high water stopping performance in the long term as compared with the conventional water blocking structure.
［第二実施例］
以下では、本発明の第二実施例における弾性止水部材３０´について、図６に示される弾性止水部材３０´の断面図及び斜視図にもとづいて説明する。
[Second Example]
Hereinafter, the elastic water stop member 30'in the second embodiment of the present invention will be described with reference to the cross-sectional view and the perspective view of the elastic water stop member 30'shown in FIG.
図６には、第二実施例における弾性止水部材３０´の断面図及び斜視図が図示されている。図６に示されるように、前述の実施例における弾性止水部材３０と同様、ゴム素材などの弾性を有する材料によって一体成形した部材であり、鋼管継手５０のスリット端部５２を挟持するための継手挟持部３１が形成され、鋼管継手５０のスリット端部５２が挿入される継手挟持凹部３１３と、当該継手挟持凹部３１３を囲む外側挟持片３１１及び内側挟持片３１２が形成されている。 FIG. 6 shows a cross-sectional view and a perspective view of the elastic water blocking member 30'in the second embodiment. As shown in FIG. 6, similar to the elastic water blocking member 30 in the above-described embodiment, it is a member integrally molded from an elastic material such as a rubber material, and is used for sandwiching the slit end portion 52 of the steel pipe joint 50. A joint holding portion 31 is formed, and a joint holding recess 313 into which the slit end 52 of the steel pipe joint 50 is inserted, and an outer holding piece 311 and an inner holding piece 312 surrounding the joint holding recess 313 are formed.
そして、図７に示されるように、外側挟持片３１１及び内側挟持片３１２は、鋼管継手５０のスリット端部５２が継手挟持凹部３１３に挿入されると、しっかり鋼管継手５０の外側面及び内側面に密接するように鋼管継手５０の曲率に略応じた形状で成形されている。 Then, as shown in FIG. 7, the outer holding piece 311 and the inner holding piece 312 are firmly formed on the outer side surface and the inner side surface of the steel pipe joint 50 when the slit end portion 52 of the steel pipe joint 50 is inserted into the joint holding recess 313. It is formed in a shape substantially corresponding to the curvature of the steel pipe joint 50 so as to be in close contact with the steel pipe joint 50.
さらに、図６に示されるように、弾性止水部材３０´には、継手挟持部３１の一方の側から環状に形成された継手スリット閉塞部３２が形成されており、当該継手スリット閉塞部３２は、所定の厚さを有する環状の環状スリット閉塞部３２３から成り、その内部には空間３２４が形成されている。これにより、先行して鋼管継手５０を打設する際に、スリット５１を介して鋼管継手５０内部へ土砂や水等が浸入することを防ぐことが可能となっている。 Further, as shown in FIG. 6, the elastic water stop member 30'is formed with a joint slit closing portion 32 formed in an annular shape from one side of the joint holding portion 31, and the joint slit closing portion 32. Is composed of an annular slit closing portion 323 having a predetermined thickness, and a space 324 is formed inside the annular slit closing portion 323. As a result, when the steel pipe joint 50 is driven in advance, it is possible to prevent earth and sand, water, or the like from entering the inside of the steel pipe joint 50 through the slit 51.
また、図６（ｂ）に示されるように、第二実施例における弾性止水部材３０´は必要長さに一体成形されている。弾性止水部材３０´は、適宜、その長さを設定することが可能であり、鋼管継手５０の延長方向に弾性止水部材３０´を継ぎ足す場合は、適宜、接着剤による方法や、加硫接着による方法等により、弾性止水部材３０´の端部同士を接続することが可能である。また、弾性止水部材３０´を鋼管継手５０のスリット端部５２に装着する際、上端側になる端部を事前に斜めにカットしておき、先行の鋼管継手５０と後行のＴ型継手１１０とがスムーズに嵌合できるようにすることが好ましい。 Further, as shown in FIG. 6B, the elastic water blocking member 30'in the second embodiment is integrally molded to the required length. The length of the elastic water stop member 30'can be set as appropriate, and when the elastic water stop member 30'is added in the extension direction of the steel pipe joint 50, an adhesive method or an adhesive method is appropriately used. It is possible to connect the ends of the elastic water blocking member 30'by a method such as vulcanization adhesion. Further, when the elastic water stop member 30'is attached to the slit end portion 52 of the steel pipe joint 50, the end portion on the upper end side is cut diagonally in advance, and the preceding steel pipe joint 50 and the trailing T-shaped joint are joined. It is preferable that the 110 and the 110 can be smoothly fitted.
続いて、図８には第二実施例におけるＰ−Ｔ継手の断面図が示されている。鋼管継手５０のスリット端部５２に弾性止水部材３０´が取り付けられた後、先行して鋼管矢板２０と一体化した鋼管継手５０が施工現場において打設された後、後行の鋼管矢板２０と一体化したＴ型継手１１０が図８に示される態様で打設されて先行の鋼管継手５０と嵌合する。 Subsequently, FIG. 8 shows a cross-sectional view of the PT joint according to the second embodiment. After the elastic water stop member 30'is attached to the slit end 52 of the steel pipe joint 50, the steel pipe joint 50 integrated with the steel pipe sheet pile 20 is placed at the construction site in advance, and then the steel pipe sheet pile 20 behind. The T-shaped joint 110 integrated with the above is driven in the manner shown in FIG. 8 and fitted with the preceding steel pipe joint 50.
Ｔ型継手１１０の打設によってウェブ部４０がスリット５１に挿入されると、弾性止水部材３０´の環状に形成された環状スリット閉塞部３２３が、Ｔ型継手１１０のウェブ部４０に広い接触面積で密接する。 When the web portion 40 is inserted into the slit 51 by driving the T-shaped joint 110, the annular slit closing portion 323 formed in an annular shape of the elastic water blocking member 30'contacts the web portion 40 of the T-shaped joint 110 widely. Close in area.
このような構成によれば、鋼管継手５０の内部と外部との間にしっかりとした止水構造を形成することとなるので、Ｔ型継手１１０の打設中に鋼管継手５０の内部への土砂や水等の浸入を防ぐことができるとともに、後に鋼管継手５０内に充填される遮水材とともに、止水性能の高い継手構造を実現することができる。 According to such a configuration, a solid water-stopping structure is formed between the inside and the outside of the steel pipe joint 50. Therefore, earth and sand inside the steel pipe joint 50 during the placement of the T-shaped joint 110. It is possible to prevent the ingress of water and water, and it is possible to realize a joint structure having high water stopping performance together with a water-shielding material that is later filled in the steel pipe joint 50.
また、第二実施例の弾性止水部材３０´は、前述のＰ−Ｔ継手に限らず、図９に示されるような所謂Ｐ−Ｐ継手の鋼管矢板継手部１００にも適用することが可能である。図示される実施例では、先行して打設される鋼管継手５０のスリット端部５２１及び５２２にそれぞれ弾性止水部材３０´Ａ及び３０´Ｂが取り付けられる。なお、後行打設される鋼管継手５０のスリット端部にも図示しないがそれぞれ弾性止水部材３０´を取り付けてもよい。 Further, the elastic water blocking member 30'of the second embodiment can be applied not only to the above-mentioned PT joint but also to the steel pipe sheet pile joint portion 100 of the so-called PP joint as shown in FIG. Is. In the illustrated embodiment, elastic water stop members 30'A and 30'B are attached to the slit ends 521 and 522 of the steel pipe joint 50 to be driven in advance, respectively. Although not shown, elastic water stop members 30'may also be attached to the slit ends of the steel pipe joint 50 to be driven later.
［弾性止水部材３０、３０´の変形例］
前述した各実施例では、弾性止水部材３０、３０´が、対向するスリット端部５２にそれぞれ取り付けられる態様について説明したが、必ずしもこのような取り付け態様に限定されるものではなく、図１０の断面図に示されるように、対向する弾性止水部材３０、３０´を一体成形することも可能である。
[Modification example of elastic water blocking members 30, 30']
In each of the above-described embodiments, the modes in which the elastic water blocking members 30 and 30'are attached to the opposing slit end portions 52 have been described, but the present invention is not necessarily limited to such an attachment mode, and FIG. As shown in the cross-sectional view, it is also possible to integrally mold the opposing elastic water blocking members 30, 30'.
すなわち、図１０に図示されるように、弾性止水部材３０、３０´の対向する継手スリット閉塞部３２を、弾性薄肉部３４を介して一体化することが可能である。このように構成することで、スリット端部５２への取り付け工程を省力化することが可能である。 That is, as shown in FIG. 10, the elastic water blocking members 30 and 30'oppositing joint slit closing portions 32 can be integrated via the elastic thin wall portion 34. With such a configuration, it is possible to save labor in the attachment process to the slit end portion 52.
また、上記のように一体化することによって、弾性止水部材３０、３０´の両側でスリット端部５２を挟持することとなるため、先行して打設される鋼管継手５０から容易に外れないようにすることが可能となる。 Further, by integrating as described above, the slit end portions 52 are sandwiched on both sides of the elastic water blocking members 30 and 30', so that the steel pipe joint 50 that is driven in advance cannot be easily removed. It becomes possible to do so.
さらに、継手スリット閉塞部３２が弾性薄肉部３４によって一体化されることで、スリット５１は完全に閉塞されるため、鋼管継手５０を先行して打設する際、鋼管継手５０内部への土砂等の浸入を確実に防ぐことが可能となる。そして、後行の継手の打設によって継手が嵌合する際は、弾性薄肉部３４によって容易に切断することができるように構成されている。 Further, since the joint slit closing portion 32 is integrated by the elastic thin-walled portion 34, the slit 51 is completely closed. Therefore, when the steel pipe joint 50 is driven in advance, earth and sand or the like inside the steel pipe joint 50 is formed. It is possible to surely prevent the invasion of. Then, when the joint is fitted by driving the subsequent joint, the elastic thin-walled portion 34 is configured to easily cut the joint.
［他の実施態様］
以上、本発明の鋼管矢板継手部１００の止水構造の一実施例について、各図面にもとづいて説明したが、具体的な構成は上記した実施形態に必ずしも限定されるものではない。
[Other embodiments]
Although an embodiment of the water blocking structure of the steel pipe sheet pile joint portion 100 of the present invention has been described above with reference to each drawing, the specific configuration is not necessarily limited to the above-described embodiment.
例えば、前述した弾性止水部材３０と第二実施例における弾性止水部材３０´とを複合的に使用することも可能であり、例えば、図１１のＰ−Ｔ継手の断面図に示されるように、一方のスリット端部５２に弾性止水部材３０を取り付け、他方のスリット端部５２に弾性止水部材３０´を取り付けることも可能である。 For example, it is also possible to use the elastic water stop member 30 described above and the elastic water stop member 30'in the second embodiment in combination, for example, as shown in the cross-sectional view of the PT joint of FIG. It is also possible to attach the elastic water stop member 30 to one of the slit ends 52 and attach the elastic water stop member 30'to the other slit end 52.
また同様に、前述した弾性止水部材３０及び第二実施例における弾性止水部材３０´を、図１２のＰ−Ｐ継手の断面図に示されるように、一方のスリット端部５２２に弾性止水部材３０Ａ、３０Ｂを取り付け、他方のスリット端部５２１に弾性止水部材３０´Ａ、３０´Ｂを取り付けることも可能である。なお、弾性止水部材３０及び弾性止水部材３０´の取り付けについては、弾性止水部材３０Ａ、３０´Ａのみを取り付けるようにしてもよく、若しくは、弾性止水部材３０Ｂ、３０´Ｂのみを取り付けるようにしてもよい。例えば、図１２の断面図において、Ｐ−Ｐ継手よりも下方が外海、上方が埋立処分地である場合、外海側にのみに弾性止水部材３０Ｂ、３０´Ｂを取り付けると、早期に外海からの遮水効果を得ることができる。また、埋立処分地側にのみに弾性止水部材３０Ａ、３０´Ａを取り付けると、早期に埋立処分地からの汚染水等に対する遮水効果を得ることができる。 Similarly, the elastic water stop member 30 described above and the elastic water stop member 30'in the second embodiment are elastically stopped at one of the slit end portions 522 as shown in the cross-sectional view of the PP joint of FIG. It is also possible to attach the water members 30A and 30B and to attach the elastic water blocking members 30'A and 30'B to the other slit end portion 521. Regarding the attachment of the elastic water stop member 30 and the elastic water stop member 30', only the elastic water stop members 30A and 30'A may be attached, or only the elastic water stop members 30B and 30'B may be attached. It may be attached. For example, in the cross-sectional view of FIG. 12, when the lower part of the PP joint is the open sea and the upper part is the landfill disposal site, if the elastic water blocking members 30B and 30'B are attached only to the open sea side, the elastic water blocking members 30B and 30'B can be installed from the open sea at an early stage. Water-blocking effect can be obtained. Further, if the elastic water blocking members 30A and 30'A are attached only to the landfill disposal site side, the water shielding effect against the contaminated water from the landfill disposal site can be obtained at an early stage.
また、図４のＰ−Ｐ継手の断面図に示されるように、鋼管継手５０のスリット端部５２へそれぞれ弾性止水部材３０を取り付ける場合、相対する弾性止水部材３０の外側スリット閉塞片３２１及び内側スリット閉塞片３２２が接触し、取り付けに若干の手間を要する。 Further, as shown in the cross-sectional view of the PP joint of FIG. 4, when the elastic water stop members 30 are attached to the slit ends 52 of the steel pipe joint 50, the outer slit closing pieces 321 of the opposite elastic water stop members 30 are attached. And the inner slit closing piece 322 come into contact with each other, and it takes some time and effort to attach.
しかし、図１２のＰ−Ｐ継手の断面図に示されるように、弾性止水部材３０と第二実施例における弾性止水部材３０´とを複合的に使用することにより、弾性止水部材３０の外側スリット閉塞片３２１と内側スリット閉塞片３２２との間に、第二実施例における弾性止水部材３０´の継手スリット閉塞部３２が収容されるように配置されるので、比較的容易に弾性止水部材３０及び弾性止水部材３０´をスリット端部５２に取り付けることが可能となる。 However, as shown in the cross-sectional view of the PP joint of FIG. 12, by using the elastic water stop member 30 and the elastic water stop member 30'in the second embodiment in combination, the elastic water stop member 30 Since the joint slit closing portion 32 of the elastic water blocking member 30'in the second embodiment is arranged between the outer slit closing piece 321 and the inner slit closing piece 322, it is relatively easily elastic. The water stop member 30 and the elastic water stop member 30'can be attached to the slit end portion 52.
また、図４のＰ−Ｐ継手の断面図には、前述したように各スリット端部５２１、５２２に弾性止水部材３０Ａ、３０Ｂ、３０Ｃ、３０Ｄを取り付けたが、必ずしもこのような態様に限定されるものではなく、弾性止水部材３０Ａ、３０Ｂのみを取り付けるようにしてもよく、若しくは、弾性止水部材３０Ｃ、３０Ｄのみを取り付けるようにしてもよい。例えば、図４の断面図において、Ｐ−Ｐ継手よりも下方が外海、上方が埋立処分地である場合、外海側にのみに弾性止水部材３０Ａ、３０Ｂを取り付けると、早期に外海からの遮水効果を得ることができる。また、埋立処分地側にのみに弾性止水部材３０Ｃ、３０Ｄを取り付けると、早期に埋立処分地からの汚染水等に対する遮水効果を得ることができる。 Further, in the cross-sectional view of the PP joint of FIG. 4, elastic water blocking members 30A, 30B, 30C, and 30D are attached to the slit ends 521 and 522 as described above, but the present invention is not necessarily limited to such an embodiment. However, only the elastic water stop members 30A and 30B may be attached, or only the elastic water stop members 30C and 30D may be attached. For example, in the cross-sectional view of FIG. 4, when the lower part of the PP joint is the open sea and the upper part is the landfill disposal site, if the elastic water blocking members 30A and 30B are attached only to the open sea side, the insulation from the open sea is early. A water effect can be obtained. Further, if the elastic water blocking members 30C and 30D are attached only to the landfill disposal site side, the water shielding effect against the contaminated water from the landfill disposal site can be obtained at an early stage.
また、前述の実施例では、図１の断面図にもとづいて、弾性止水部材３０の継手スリット閉塞部３２に、外側スリット閉塞片３２１と内側スリット閉塞片３２２とが形成された実施例を説明したが、本発明は必ずしもこのような実施例に限定されるものではなく、例えば、図１３に示されているように、一つのスリット閉塞片によって、スリット５１を閉塞するように構成してもよい。 Further, in the above-described embodiment, an embodiment in which the outer slit closing piece 321 and the inner slit closing piece 322 are formed in the joint slit closing portion 32 of the elastic water blocking member 30 will be described based on the cross-sectional view of FIG. However, the present invention is not necessarily limited to such an embodiment, and for example, as shown in FIG. 13, even if the slit 51 is configured to be closed by one slit closing piece. Good.
より具体的には、図１３（ａ）に示されるように、鋼管継手５０の外側でスリット５１を閉塞してもよいし、図１３（ｂ）に示されるように、鋼管継手５０の内側でスリット５１を閉塞してもよい。なお、鋼管継手５０の内側に継手スリット閉塞部３２を形成して閉塞するように構成した場合は、鋼管継手５０の打設時における継手スリット閉塞部３２に対する抵抗力を生じ難くさせることが可能である。 More specifically, as shown in FIG. 13 (a), the slit 51 may be closed outside the steel pipe joint 50, or as shown in FIG. 13 (b), inside the steel pipe joint 50. The slit 51 may be closed. When the joint slit closing portion 32 is formed inside the steel pipe joint 50 to close the steel pipe joint 50, it is possible to make it difficult to generate a resistance force against the joint slit closing portion 32 at the time of placing the steel pipe joint 50. is there.
また、前述の各実施例では、弾性止水部材３０、３０´を鋼管継手５０に装着したわけであるが、特に、鋼管継手５０が土中に打設される際には、鋼管継手５０の先端部にかかる圧力によって、弾性止水部材３０、３０´に、ずれが発生するおそれがある。このような不具合を防止するために、弾性止水部材３０、３０´の下端面を覆うような底板（例えば、鉄板）を鋼管継手５０に溶接などにより取り付けるようにしてもよい。さらに、弾性止水部材３０´においては、環状の環状スリット閉塞部３２３内部の空間３２４に土砂が侵入しないように、上記底板によって空間３２４の下端部を併せて閉塞することが好ましい。 Further, in each of the above-described embodiments, the elastic water blocking members 30 and 30'are attached to the steel pipe joint 50. In particular, when the steel pipe joint 50 is driven into the soil, the steel pipe joint 50 The pressure applied to the tip portion may cause the elastic water stop members 30 and 30'to shift. In order to prevent such a defect, a bottom plate (for example, an iron plate) that covers the lower end surfaces of the elastic water blocking members 30 and 30'may be attached to the steel pipe joint 50 by welding or the like. Further, in the elastic water blocking member 30', it is preferable that the lower end portion of the space 324 is also closed by the bottom plate so that earth and sand do not enter the space 324 inside the annular slit closing portion 323.
また、本発明の弾性止水部材３０及び第二実施例における弾性止水部材３０´は、前述したようにゴム素材などの弾性を有する素材により一体成形されるが、適度の硬さ、弾性、変形追随性などを有するものであれば、プラスチック素材を使用することも可能である。 Further, the elastic water-stopping member 30 of the present invention and the elastic water-stopping member 30'in the second embodiment are integrally molded with an elastic material such as a rubber material as described above, but have appropriate hardness and elasticity. It is also possible to use a plastic material as long as it has deformation followability.
また、本発明の弾性止水部材３０及び第二実施例における弾性止水部材３０´に使用される弾性を有するゴム素材の種類としては、天然ゴム、合成天然ゴム、ブタジエンゴム、スチレンブタジエンゴム、ブチルゴム、ニトリルゴム、クロロプレンゴム、エチレンプロピレンゴム、アクリルゴム、クロロスルフォン化ポリエチレン、ウレタンゴム、シリコーンゴム、フッ素ゴム、エチレン酢酸ビニルゴム、エピクロルヒドリンゴム、多流化ゴムなど、鋼管継手５０のスリット端部５２をしっかりと挟持しつつ、鋼管継手５０の打設時や継手の嵌合時に止水性能を維持できるものであれば、適宜、使用することが可能である。 The types of elastic rubber materials used for the elastic waterproof member 30 of the present invention and the elastic waterproof member 30'in the second embodiment include natural rubber, synthetic natural rubber, butadiene rubber, and styrene butadiene rubber. Slit end 52 of steel pipe joint 50 such as butyl rubber, nitrile rubber, chloroprene rubber, ethylene propylene rubber, acrylic rubber, chlorosulphonized polyethylene, urethane rubber, silicone rubber, fluororubber, ethylene vinyl acetate rubber, epichlorohydrin rubber, multi-flow rubber, etc. Can be appropriately used as long as it can maintain the water-stopping performance when the steel pipe joint 50 is driven or the joint is fitted while firmly holding the rubber pipe joint 50.
また、前述した各実施例では、Ｐ型継手１２０に円形の鋼管継手５０を使用しているが、必ずしも鋼管継手５０は円形形状に限定されるものではなく、例えば、角型形状の鋼管を使用することも可能である。 Further, in each of the above-described embodiments, the circular steel pipe joint 50 is used for the P-shaped joint 120, but the steel pipe joint 50 is not necessarily limited to the circular shape, and for example, a square steel pipe is used. It is also possible to do.
また、本実施例では、鋼管継手５０内に充填される遮水材として、変形追随性遮水材を使用したが、必ずしも変形追随性遮水材に限定されるものではなく、他の遮水材を使用することも可能である。なお、鋼管継手５０内に充填される遮水材としてアスファルト系材料を使用することも可能ではあるが、長期的な遮水性能を確保する観点から、上記変形追随性遮水材を使用することが好ましい。 Further, in this embodiment, the deformation-following water-impervious material is used as the water-impervious material filled in the steel pipe joint 50, but the material is not necessarily limited to the deformation-following water-impervious material, and other water-impervious materials are used. It is also possible to use wood. Although it is possible to use an asphalt-based material as the water-impervious material filled in the steel pipe joint 50, the deformation-following water-impervious material should be used from the viewpoint of ensuring long-term water-impervious performance. Is preferable.
また、前述した実施例では、土中部におけるＰ型継手１２０の鋼管継手５０の内部に遮水材入り袋を設置し、水中部にあっては変形追随性遮水材を充填したが、必ずしもこのような形態に限られるものではなく、例えば、水中部においても遮水機能を有する遮水材入り袋を設置することが可能である。 Further, in the above-described embodiment, a bag containing a water-impervious material is installed inside the steel pipe joint 50 of the P-type joint 120 in the soil, and the underwater part is filled with the deformation-following water-impervious material. It is not limited to such a form, and for example, it is possible to install a bag containing a water-impervious material having a water-impervious function even in an underwater part.
以上、本発明の各実施例について説明したが、本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。また、上記実施例に記載された具体的な材質、寸法形状等は本発明の課題を解決する範囲において、変更が可能である。 Although each embodiment of the present invention has been described above, the scope of the present invention is shown not by the description of the above-described embodiment but by the scope of claims, and further, all within the meaning and scope equivalent to the scope of claims. Changes are included. In addition, the specific materials, dimensions, shapes, etc. described in the above examples can be changed as long as the problems of the present invention are solved.
２０ 鋼管矢板
３０ 弾性止水部材
３１ 継手挟持部
３２ 継手スリット閉塞部
４０ ウェブ部
５０ 鋼管継手
５１ スリット
５２ スリット端部
１００ 鋼管矢板継手部
１１０ Ｔ型継手
１２０ Ｐ型継手
３１１ 外側挟持片
３１２ 内側挟持片
３１３ 継手挟持凹部
３２１ 外側スリット閉塞片
３２２ 内側スリット閉塞片
20 Steel pipe sheet pile 30 Elastic water stop member 31 Joint holding part 32 Joint slit closing part 40 Web part 50 Steel pipe joint 51 Slit 52 Slit end 100 Steel pipe sheet pile joint part 110 T-shaped joint 120 P-shaped joint 311 Outer holding piece 312 Inner holding piece 313 Joint holding recess 321 Outer slit closing piece 322 Inner slit closing piece
Claims (5)
弾性を有する素材により一体成形されて成るとともに、前記スリットにおける互いに対向する二つのスリット端部にそれぞれ設けられる弾性止水部材と、を有し、
前記弾性止水部材は、
前記スリット端部を弾性力によって挟持する継手挟持部と、
前記継手挟持部から延設されるとともに、前記スリットを閉塞する継手スリット閉塞部と、を備えた
ことを特徴とする鋼管矢板継手部の止水構造。 Steel pipe fittings with slits and
It is integrally molded with an elastic material, and has an elastic water blocking member provided at each of two slit ends facing each other in the slit.
The elastic water blocking member is
A joint holding portion that holds the slit end by elastic force,
A water-stop structure for a steel pipe sheet pile joint portion, which is provided with a joint slit closing portion extending from the joint holding portion and closing the slit.
請求項１に記載の鋼管矢板継手部の止水構造。 In the joint holding portion, a joint holding recess into which the slit end is inserted is formed, and an outer holding piece that abuts on the outer surface of the slit end inserted in the joint holding recess and an inner side of the slit end. The water-stop structure of a steel pipe sheet pile joint portion according to claim 1, wherein an inner holding piece that abuts on a side surface is formed.
請求項１または請求項２に記載の鋼管矢板継手部の止水構造。 The joint slit closing portion includes an outer slit closing piece that closes the slit on the outside of the steel pipe joint and an inner slit closing piece that closes the slit on the inside of the steel pipe joint. Water-stop structure of the steel pipe sheet pile joint described in.
請求項１〜３のいずれかに記載の鋼管矢板継手部の止水構造。 The water-stopping structure for a steel pipe sheet pile joint according to any one of claims 1 to 3, wherein the joint slit closing portions facing each other are integrally molded via an elastic material.
請求項１または請求項２に記載の鋼管矢板継手部の止水構造。 The water-stop structure of the steel pipe sheet pile joint according to claim 1 or 2, wherein the joint slit closing portion is formed in a hollow annular shape and closes the slit between two slit ends facing each other. ..
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02296914A (en) * | 1989-05-09 | 1990-12-07 | Fujiigumi:Kk | Construction method for row of steel pipe pile |
| JP2001348862A (en) * | 2000-04-07 | 2001-12-21 | Nippon Steel Corp | Cut-off structure for steel sheet pile joint part, impervious revetment structure and construction method |
| JP2003138559A (en) * | 2001-11-06 | 2003-05-14 | Nippon Steel Corp | Cutoff structure of steel sheet pile joint part |
| JP2009036009A (en) * | 2007-07-11 | 2009-02-19 | Ohmoto Gumi Co Ltd | Joint structure of steel sheet pile and method of constructing the same |
-
2019
- 2019-03-08 JP JP2019042399A patent/JP7243305B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02296914A (en) * | 1989-05-09 | 1990-12-07 | Fujiigumi:Kk | Construction method for row of steel pipe pile |
| JP2001348862A (en) * | 2000-04-07 | 2001-12-21 | Nippon Steel Corp | Cut-off structure for steel sheet pile joint part, impervious revetment structure and construction method |
| JP2003138559A (en) * | 2001-11-06 | 2003-05-14 | Nippon Steel Corp | Cutoff structure of steel sheet pile joint part |
| JP2009036009A (en) * | 2007-07-11 | 2009-02-19 | Ohmoto Gumi Co Ltd | Joint structure of steel sheet pile and method of constructing the same |
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