JP2006200203A - Plastic-board drain material, and device for pulling out the drain material - Google Patents

Plastic-board drain material, and device for pulling out the drain material Download PDF

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JP2006200203A
JP2006200203A JP2005012452A JP2005012452A JP2006200203A JP 2006200203 A JP2006200203 A JP 2006200203A JP 2005012452 A JP2005012452 A JP 2005012452A JP 2005012452 A JP2005012452 A JP 2005012452A JP 2006200203 A JP2006200203 A JP 2006200203A
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drain
drain material
plastic
tensile reinforcing
tensile
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JP4609793B2 (en
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Takashi Tsuchida
孝 土田
Yoichi Watabe
要一 渡部
Hiroshi Yonetani
宏史 米谷
Koji Onoda
浩二 小野田
Hiroshi Niiya
博 新舎
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Hiroshima University NUC
Penta Ocean Construction Co Ltd
National Institute of Maritime Port and Aviation Technology
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Hiroshima University NUC
Penta Ocean Construction Co Ltd
National Institute of Maritime Port and Aviation Technology
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic-board drain material which can be suitably removed from ground after the ground is improved by a consolidation method, and a device for pulling out the drain material. <P>SOLUTION: The plastic-board drain material comprises: plastic drain members 11 and 12 where permeable filters 21 and 21 are fixed on the front and back sides of a water-passing-groove-forming core material 20 with water passing grooves 18 and 19 continuously provided in longitudinal directions on the front and back sides, in such an arrangement as to close opened parts of the grooves 18 and 19; and a thin strip-like or linear tensile reinforcing material 13. The plastic-board drain material can be removed from the improved ground by integrating the material 13 with the drain members 11 and 12 along the longitudinal direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、主にバーティカルドレーン工法のドレーン材として使用されるプラスチックボードドレーン材及び該ドレーン材の引き抜き装置に関する。   The present invention relates to a plastic board drain material mainly used as a drain material for a vertical drain method and an apparatus for pulling out the drain material.

従来、軟弱地盤の改良工法として、軟弱地盤中にプラスチックボードドレーン等の工業製品のドレーン材を鉛直方向に複数打設し、排水距離を短縮することにより圧密を促進させて地盤改良を行うバーティカルドレーン工法（以下、ＰＶＤ工法と記す）が知られている。   Conventionally, as an improvement method for soft ground, vertical drains that improve the ground by accelerating consolidation by placing multiple drains of industrial products such as plastic board drains in the vertical direction in the soft ground and shortening the drainage distance A construction method (hereinafter referred to as a PVD construction method) is known.

このＰＶＤ工法には、ドレーン材として、例えば、波形断面を有し、長手方向に向けて通水溝が形成された心材の表裏両面に不織布からなる透水性被覆材を被着して構成されているプラスチックボードドレーン材（以下、ＰＢＤ材と記す）が使用されている（例えば特許文献１）。   In this PVD method, as a drain material, for example, a water-permeable covering material made of a nonwoven fabric is applied to both front and back surfaces of a core material having a corrugated cross section and having a water flow groove formed in the longitudinal direction. A plastic board drain material (hereinafter referred to as PBD material) is used (for example, Patent Document 1).

尚、このようなＰＢＤ材は、一般的に５００ｋｇｆ程度の引張荷重が作用すると破断してしまうので、ＰＶＤ工法において、地中に打設されたＰＢＤ材を撤去することは、非常に困難であり、撤去するのに多大な費用を要する為、打設されたＰＢＤ材はそのまま地盤内に残存させるのが通常である。
特開２００２−１３８４５６号公報 In addition, since such a PBD material generally breaks when a tensile load of about 500 kgf is applied, it is very difficult to remove the PBD material placed in the ground in the PVD method. Since the removal requires a great deal of cost, the placed PBD material is usually left in the ground as it is.
JP 2002-138456 A

しかし、上述の従来例のように、ＰＢＤ材を地中に残存させておくと、後にその部分を掘削する際に障害物となるという問題があり、ＰＢＤ材を産業廃棄物として処理する際に土砂と分別することが困難であるため、産業廃棄物の量が膨大となり、処分費用が嵩むという問題があった。   However, if the PBD material is left in the ground as in the above-described conventional example, there is a problem that it becomes an obstacle when excavating the portion later, and when processing the PBD material as industrial waste, Since it is difficult to separate from earth and sand, there is a problem that the amount of industrial waste becomes enormous and disposal costs increase.

そこで本発明は、上述の従来技術の問題を鑑み、地盤改良工事施工後に地盤より全部又は一部を好適に撤去することができる撤去型プラスチックボードドレーン材及び該ドレーン材の引き抜き装置の提供を目的とする。   In view of the above-described problems of the prior art, the present invention has an object to provide a removal-type plastic board drain material that can suitably remove all or part of the ground after the ground improvement work and an apparatus for extracting the drain material. And

上述の如き従来の問題を解決し、所期の目的を達成するための請求項１に記載の発明は、通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状をした引張補強材とを有し、該引張補強材を長手方向に沿って前記ドレーン部材と一体化させてなる地盤改良後に撤去可能なプラスチックボードドレーン材であることを特徴とする。   In order to solve the conventional problems as described above and achieve the intended purpose, the invention according to claim 1 is directed to the front and back of the core material for forming a water flow groove having water flow grooves continuously in the longitudinal direction of the front and back surfaces. A plastic drain member having a water permeable filter fixed in an arrangement for closing the opening of the water passage groove, and a tensile member made of a ribbon or wire, It is a plastic board drain material that can be removed after ground improvement that is integrated with the drain member along the longitudinal direction.

請求項２に記載の発明は、請求項１の構成に加え、引張補強材を薄帯板状とし、一対のドレーン部材を、前記引張補強材の表裏両面に互いに対称配置に固着したことを特徴とする。   The invention according to claim 2 is characterized in that, in addition to the configuration of claim 1, the tensile reinforcing material is in the form of a ribbon, and the pair of drain members are fixed symmetrically to both the front and back surfaces of the tensile reinforcing material. And

請求項３に記載の発明は、請求項１又は２の構成に加え、通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状の引張補強材とを有し、該引張補強材を長手方向に沿って前記ドレーン部材と一体化させて構成される撤去部と、該撤去部のドレーン部材の下端に連続配置されたドレーン部材からなる埋め捨て部とを有し、該埋め捨て部の上端を撤去部の下端に対して、ドレーン材打設作業時に作用する通常の引っ張り力によっては離れないが、前記撤去部を撤去する際の抜去力によって離れる程度の結合力で連結したことを特徴とする。   In addition to the structure of claim 1 or 2, the invention according to claim 3 opens the water groove on the front and back sides of the core material for forming a water groove having continuous water grooves in the longitudinal direction of the front and back surfaces. A drain member made of plastic with a water permeable filter fixed in an arrangement for closing the portion, and a ribbon-like or linear tensile reinforcing material, and the tensile reinforcing material is integrated with the drain member along the longitudinal direction A removal portion configured and a buried portion made of a drain member continuously arranged at the lower end of the drain member of the removed portion, and the upper end of the buried portion is lower than the lower end of the removed portion, Although it does not leave | separate by the normal pulling force which acts at the time of drain material driving | operation work, it connected with the coupling force of the grade which leaves | separates by the removal force at the time of removing the said removal part, It is characterized by the above-mentioned.

請求項４に記載の発明は、請求項１、２又は３の構成に加え、引張補強材がポリオレフィン系の合成樹脂材を延伸してシート状に成形したプラスチック帯状材であり、該引張補強材に前記ドレーン部材を、合成樹脂ラミネート層を介して固着させたことを特徴とする。   The invention according to claim 4 is the plastic band-like material obtained by stretching the polyolefin-based synthetic resin material into a sheet shape in addition to the configuration of claim 1, 2, or 3, and the tensile reinforcement material The drain member is fixed through a synthetic resin laminate layer.

請求項５に記載の発明は、請求項１、２又は３の構成に加え、引張補強材が帯状鋼板であり、該引張補強材に前記ドレーン部材を、接着剤層を介して固着させたことを特徴とする。   In addition to the structure of Claim 1, 2, or 3, the invention of Claim 5 is that the tensile reinforcing material is a strip steel plate, and the drain member is fixed to the tensile reinforcing material via an adhesive layer. It is characterized by.

請求項６に記載の発明は、板状のドレーン材が挟持されるチャックと、該チャックに引き上げ力を与える引き上げ駆動部材とを有し、前記チャックは、前記引き上げ駆動部材によって動作される本体部と、該本体部から垂下され、表面にドレーン材挟持面を有するドレーン材押し当て部と、該ドレーン材押し当て部の両側部に対称配置にそれぞれ回動可能に支持された一対の可動支持部材と、該両可動軸支部に両端を支持させ前記ドレーン材挟持面に対し間隔を置いて配置された円筒状又は円柱状の可動挟持部とを備え、前記ドレーン材の上端部を前記可動挟持部の上半部外周に巻き付けるとともに前記ドレーン材挟持面と前記可動挟持部との間に下向きに挿入させるようにしたドレーン材の引き抜き装置であることを特徴とする。   The invention according to claim 6 includes a chuck in which a plate-shaped drain material is sandwiched, and a pulling drive member that applies a pulling force to the chuck, and the chuck is operated by the pulling drive member. A drain material pressing portion that is suspended from the main body and has a drain material clamping surface on the surface, and a pair of movable support members that are rotatably supported on both sides of the drain material pressing portion in a symmetrical arrangement. And a cylindrical or columnar movable clamping portion that is supported at both ends by the movable shaft support portions and spaced from the drain material clamping surface, and the upper end portion of the drain material is the movable clamping portion. A drain material pulling device which is wound around the outer periphery of the upper half and inserted downward between the drain material clamping surface and the movable clamping portion.

請求項７に記載の発明は、請求項６の構成に加え、可動挟持部は、外周をゴム状シート材により被覆したことを特徴とする。   The invention according to claim 7 is characterized in that, in addition to the configuration of claim 6, the movable holding portion has an outer periphery covered with a rubber-like sheet material.

本発明に係るプラスチックボードドレーン材は、通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状をした引張補強材とを有し、該引張補強材を長手方向に沿って前記ドレーン部材と一体化させたことにより、十分な引張強度を有するので、ＰＶＤ工法により地盤改良工事を施工した後に好適に地盤より引き抜き、撤去することができる。   The plastic board drain material according to the present invention has a water permeable filter in an arrangement in which the opening portion of the water passage groove is closed on the front and back of the water passage groove forming core material having the water passage groove continuously in the longitudinal direction of the front and back sides. A plastic drain member to which is fixed, and a tensile reinforcement material in the form of a ribbon or a wire, and the tensile reinforcement material is integrated with the drain member along the longitudinal direction. Since it has tensile strength, it can be suitably pulled out from the ground and removed after the ground improvement work is performed by the PVD method.

引張補強材を薄帯板状とし、一対のドレーン部材を、前記引張補強材の表裏両面に互いに対称配置に固着したことにより、ＰＢＤ材の表裏面部より好適に排水を行うことができる。   By making the tensile reinforcing material into a strip-like plate shape and fixing the pair of drain members in a symmetrical arrangement on both the front and back surfaces of the tensile reinforcing material, drainage can be suitably performed from the front and back surfaces of the PBD material.

通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状の引張補強材とを有し、該引張補強材を長手方向に沿って前記ドレーン部材と一体化させて構成される撤去部と、該撤去部のドレーン部材の下端に連続配置されたドレーン部材からなる埋め捨て部とを有し、該埋め捨て部の上端を撤去部の下端に対して、ドレーン材打設作業時に作用する通常の引っ張り力によっては離れないが、前記撤去部を撤去する際の抜去力によって離れる程度の結合力で連結したことにより、撤去部を撤去する際に抜去力を作用させることによって、ＰＢＤ材が撤去部と埋め捨て部とに分離され、埋め捨て部を残して撤去部のみを好適に地盤中より引き抜くことができる。   A plastic drain member in which a water permeable filter is fixed to the front and back surfaces of the water groove forming core material having the water flow grooves continuously in the longitudinal direction of the front and back surfaces, and an open portion of the water flow groove is closed; A strip plate-like or linear tensile reinforcement member, a removal portion configured by integrating the tensile reinforcement member with the drain member along the longitudinal direction, and a lower end of the drain member of the removal portion A buried portion composed of continuously disposed drain members, and the upper end of the buried portion is not separated from the lower end of the removed portion by a normal pulling force acting during the drain material placing operation, The PBD material is separated into the removal part and the buried part by applying the removal force when removing the removal part by connecting with a binding force that is separated by the removal force when removing the removal part, Removed leaving the buried part Only can be suitably pulled out from in the ground.

引張補強材がポリオレフィン系の合成樹脂材を延伸してシート状に成形したプラスチック帯状材であり、該引張補強材に前記ドレーン部材を、合成樹脂ラミネート層を介して固着させたことにより、材料の軽量化が図られ、ドレーン材打設作業等において作業効率がよい。また、合成樹脂ラミネート層を介して融着させるのでドレーン部材を好適に引張補強材の表裏に固着させることができる。   The tensile reinforcing material is a plastic band-shaped material formed by stretching a polyolefin-based synthetic resin material into a sheet shape, and the drain member is fixed to the tensile reinforcing material via a synthetic resin laminate layer. Weight reduction is achieved, and work efficiency is good in drain material placing work and the like. Moreover, since it fuse | fuses via a synthetic resin laminate layer, a drain member can be suitably fixed to the front and back of a tensile reinforcement material.

引張補強材が帯状鋼板であり、該引張補強材に前記ドレーン部材を、接着剤層を介して固着させたことにより、強度が高く、地盤に対し好適に打設及び引抜き作業を行うことができる。   The tensile reinforcing material is a strip-shaped steel plate, and the drain member is fixed to the tensile reinforcing material via an adhesive layer, so that the strength is high, and it is possible to perform the placement and drawing operations suitably for the ground. .

板状のドレーン材が挟持されるチャックと、該チャックに引き上げ力を与える引き上げ駆動部材とを有し、前記チャックは、前記引き上げ駆動部材によって動作される本体部と、該本体部から垂下され、表面にドレーン材挟持面を有するドレーン材押し当て部と、該ドレーン材押し当て部の両側部に対称配置にそれぞれ回動可能に支持された一対の可動支持部材と、該両可動軸支部に両端を支持させ前記ドレーン材挟持面に対し間隔を置いて配置された円筒状又は円柱状の可動挟持部とを備え、前記ドレーン材の上端部を前記可動挟持部の上半部外周に巻き付けるとともに前記ドレーン材挟持面と前記可動挟持部との間に下向きに挿入させるようにしたことにより、挟持した部分の締め付け力と、巻き付けた部分の摩擦力によりドレーン材の端部を保持するので、荷重が一点に集中せずに分散されるので切断し難くなり、安全かつ確実に引抜作業を行うことができる。   A chuck in which a plate-shaped drain material is sandwiched, and a pulling drive member that applies a pulling force to the chuck, and the chuck is suspended from the main body portion that is operated by the pulling drive member, A drain material pressing portion having a drain material clamping surface on the surface, a pair of movable support members that are rotatably supported on both sides of the drain material pressing portion in a symmetrical arrangement, and both ends on both movable shaft support portions A cylindrical or columnar movable sandwiching portion disposed at a distance from the drain material sandwiching surface, and winding the upper end of the drain material around the upper half of the movable sandwiching portion and By inserting it downward between the draining material clamping surface and the movable clamping part, the clamping force of the clamped part and the frictional force of the wound part of the draining material Since holding the parts, load is not easily cut because it is dispersed without concentrating on one point, safely and reliably can perform drawing operations.

また、可動挟持部は、外周をゴム状シート材により被覆したことにより、ドレーン材に対し好適に摩擦力を生じる。   In addition, the movable clamping portion suitably generates a frictional force against the drain material by covering the outer periphery with a rubber-like sheet material.

次に本発明に係るプラスチックボードドレーン材の実施の形態を図面に示した実施例に基づいて説明する。   Next, embodiments of the plastic board drain material according to the present invention will be described based on the examples shown in the drawings.

図１は、本発明に係るプラスチックボードドレーン材（以下、ＰＢＤ材と記す）の一例を示し、図中符号１０はＰＢＤ材である。   FIG. 1 shows an example of a plastic board drain material (hereinafter referred to as a PBD material) according to the present invention, and reference numeral 10 in the figure denotes a PBD material.

このＰＢＤ材１０には、一対のドレーン部材１１，１２が薄帯板状の引張補強材１３の表裏両面に互いに対称配置に固着され、ドレーン部材１１，１２と引張補強材１３とがその長手方向に沿って一体化されている。   A pair of drain members 11 and 12 are fixed to the PBD material 10 symmetrically on both the front and back surfaces of the thin ribbon-like tensile reinforcement member 13, and the drain members 11 and 12 and the tensile reinforcement member 13 are arranged in the longitudinal direction. It is integrated along.

また、このＰＢＤ材１０は、一対のドレーン部材１１，１２を引張補強材１３の表裏両面に互いに対称配置に固着してなる撤去部１４と、いずれか一方のドレーン部材１１の下端に連続配置に接続されたドレーン部材１５からなる埋め捨て部とをもって構成し、撤去部１４と埋め捨て部とは、ドレーン打設作業時に作用する通常の引張力によっては離れず、撤去する際の抜去力によって離れるようになっている。   Further, the PBD material 10 has a pair of drain members 11, 12 continuously attached to the front and back surfaces of the tensile reinforcement member 13 in a symmetrical arrangement with each other, and a continuous arrangement at the lower end of one of the drain members 11. The removal portion 14 and the burying portion are not separated from each other by a normal tensile force acting at the time of placing the drain, but separated by a removal force at the time of removal. It is like that.

引張補強材１３は、ポリオレフィン系の合成樹脂材を延伸してシート状に成形したプラスチック帯状体をもって構成され、長手方向即ちドレーン材の引き抜き方向に作用する荷重に対して高い強度を備えている。   The tensile reinforcement member 13 is formed of a plastic strip formed by stretching a polyolefin-based synthetic resin material into a sheet shape, and has high strength against a load acting in the longitudinal direction, that is, the draining direction of the drain material.

このプラスチック帯状体の表裏に合成樹脂ラミネート層１７を介して熱融着させることによりドレーン部材１１，１２が固着される。   The drain members 11 and 12 are fixedly bonded to the front and back surfaces of the plastic strip through the synthetic resin laminate layer 17.

ドレーン部材１１，１２，１５は、表裏に長手方向に通水用溝１８，１９を有する通水溝形成用心材２０と、通水溝形成用心材２０の表裏両面を覆う透水性フィルター２１，２１とを備え、通水溝形成用心材２０の表裏面にそれぞれ通水性フィルター２１，２１が固着されている。   The drain members 11, 12, and 15 include a water passage groove forming core member 20 having water passage grooves 18 and 19 in the longitudinal direction on the front and back sides, and water permeable filters 21 and 21 that cover both front and back surfaces of the water passage groove forming core member 20. The water-permeable filters 21 and 21 are respectively fixed to the front and back surfaces of the water-groove forming core material 20.

通水溝形成用心材２０は、互いに対向して平行に配置された複数の縦壁材２２，２２…と、各縦壁材２２，２２間に配された横壁材２３，２３とを備え、断面形状において横壁材２３，２３が千鳥状に配置されたことによって、通水溝形成用心材２０の表裏にそれぞれ浅通水用溝１８と深通水用溝１９とが交互に並んで形成されている。   The water flow groove forming core member 20 includes a plurality of vertical wall members 22, 22... Arranged in parallel and facing each other, and horizontal wall members 23, 23 arranged between the vertical wall members 22, 22. In the cross-sectional shape, the horizontal wall members 23 and 23 are arranged in a staggered manner, so that the shallow water passage grooves 18 and the deep water passage grooves 19 are alternately formed on the front and back surfaces of the water passage groove forming core material 20. ing.

透水性フィルター２１は、ポリエステル系合成繊維からなる不織布をもって透水性を有するシート状に形成されている。   The water permeable filter 21 is formed in a sheet shape having water permeability with a nonwoven fabric made of polyester synthetic fibers.

撤去部１４を構成するドレーン部材１１と埋め捨て部を構成するドレーン部材１５とは、図３、図４に示すように、ドレーン部材１１の下端部に埋め捨て部を構成するドレーン部材１５を連続配置し、その互いに突き合わされた端部間の表面に接続用当て板２４を架け渡し、接続用当て板２４にそれぞれドレーン部材１１，１５を固定している。   As shown in FIGS. 3 and 4, the drain member 11 constituting the removal part 14 and the drain member 15 constituting the dumping part are connected to the drain member 15 constituting the dumping part continuously at the lower end part of the drain member 11. The connecting contact plate 24 is placed on the surface between the end portions that are arranged to face each other, and the drain members 11 and 15 are fixed to the connection contact plate 24, respectively.

撤去部１４を構成するドレーン部材１１と接続用当て板２４とは、例えば、平型のかすがい２５を使用して、そのかすがいの脚部２５ａを撤去部１４、即ちドレーン部材１１、引張補強材１３及びドレーン部材１２を貫通させ、先端の爪部２５ｂをドレーン部材１２の表面部に係止させて高強度で固定され、ドレーン撤去時の抜去力が作用しても離脱しないようになっている。   The drain member 11 and the connecting contact plate 24 constituting the removal portion 14 are, for example, a flat-type bite 25, and the leg portion 25a of the bite is removed, that is, the drain member 11, the tensile reinforcement. The material 13 and the drain member 12 are penetrated, the claw portion 25b at the tip is locked to the surface portion of the drain member 12, and is fixed with high strength, so that it does not come off even when the removal force at the time of drain removal acts. Yes.

一方、埋め捨て部を構成するドレーン部材１５と接続用当て板２４とは、例えば、複数のステープル２６，２６…を長手方向に向けて平行に打設することにより、所定の強度で固定され、その所定の強度以上の荷重が作用するとドレーン部材１５が接続用当て板２４より離脱するようになっている。尚、ドレーン部材１５と接続用当て板２４との接続強度は、ステープルの数で調整することができるようになっている。   On the other hand, the drain member 15 and the connecting contact plate 24 constituting the buried portion are fixed with a predetermined strength by, for example, driving a plurality of staples 26, 26... In parallel in the longitudinal direction, When a load exceeding the predetermined strength is applied, the drain member 15 is detached from the connection backing plate 24. It should be noted that the connection strength between the drain member 15 and the connection backing plate 24 can be adjusted by the number of staples.

このように構成することにより、埋め捨て部の上端が撤去部１４の下端に対して、ドレーン材打設作業時に作用する通常の引張力によっては離れないが、撤去部１４を撤去する際の抜去力によって離れるようになっている。   By configuring in this way, the upper end of the buried portion is not separated from the lower end of the removal portion 14 by a normal tensile force acting at the time of drain material placing work, but is removed when the removal portion 14 is removed. They are separated by force.

尚、連結された両ドレーン部材１１，１５の連結部間には、外周の密封処理が施されており、両ドレーン部材１１，１５の通水断面は互いに好適に連通されている。   In addition, the sealing process of the outer periphery is performed between the connection parts of the connected both drain members 11 and 15, and the water flow cross section of both the drain members 11 and 15 is mutually connected suitably.

このように構成されたＰＢＤ材１０は、図５に示すように、そのＰＢＤ材１０（撤去部１４）の上端部を挟持した状態で引き抜き装置３０により引き上げることにより撤去部１４と埋め捨て部とが分離して、埋め捨て部が地盤中に留まり、撤去部１４のみが地盤より引き抜かれるようになっている。   As shown in FIG. 5, the PBD material 10 configured in this manner is pulled up by the pulling device 30 while holding the upper end portion of the PBD material 10 (removal portion 14), and the removal portion 14 and the buried portion. Are separated, the buried part remains in the ground, and only the removal part 14 is pulled out from the ground.

この引き抜き装置３０は、ＰＢＤ材１０を挟持するチャック３１と、チャック３１に引き上げ力を与える引き上げ駆動部材３２とを有し、チャック３１にＰＢＤ材１０を挟持させ、そのチャック３１を引き上げ駆動部材３２により引き上げることによりＰＢＤ材１０を地盤より引き抜くようになっている。   The pulling device 30 includes a chuck 31 that holds the PBD material 10 and a pulling drive member 32 that applies a pulling force to the chuck 31. The chuck 31 holds the PBD material 10, and the chuck 31 is pulled up. By pulling up, the PBD material 10 is pulled out from the ground.

引き上げ駆動部材３２は、クレーン３３より繰出された吊りワイヤ３４を支持リーダ３５に支持された滑車を通して吊り降ろさせ、その吊りワイヤ３４の先端にチャック３１を取り付けておき、クレーン３３により吊りワイヤ３４を巻取ることにより、チャック３１に引き上げ力を与えることができるようになっている。   The lifting drive member 32 suspends the suspension wire 34 fed from the crane 33 through a pulley supported by the support leader 35, attaches a chuck 31 to the tip of the suspension wire 34, and the suspension wire 34 is moved by the crane 33. A lifting force can be applied to the chuck 31 by winding.

チャック３１は、図６に示すように、引き上げ駆動部材３２によって動作される本体部４０と、本体部４０から垂下され、表面にドレーン材挟持面４１ａを有するドレーン材押し当て部４１と、ドレーン材押し当て部４１の両側部にそれぞれ回動可能に支持された一対の可動支持部材４２，４２と、両可動支持部材４２，４２に両端が支持され、ドレーン材挟持面４１ａと対向して配置された可動挟持部４３とを備えている。   As shown in FIG. 6, the chuck 31 includes a main body 40 that is operated by the pulling drive member 32, a drain material pressing part 41 that is suspended from the main body 40 and has a drain material clamping surface 41 a on the surface, and a drain material. A pair of movable support members 42, 42 that are rotatably supported on both sides of the pressing portion 41, and both ends are supported by both movable support members 42, 42, and are disposed to face the drain material clamping surface 41 a. The movable clamping part 43 is provided.

本体部４０とドレーン材押し当て部４１とは、断面逆Ｌ字状に一体に形成され、その上端部、即ち本体部４０の上端部に吊りワイヤ３４の先端部が取り付けられるようになっている。   The main body portion 40 and the drain material pressing portion 41 are integrally formed in an inverted L-shaped cross section, and the tip end portion of the suspension wire 34 is attached to the upper end portion thereof, that is, the upper end portion of the main body portion 40. .

また、ドレーン材押し当て部４１のＬ字内側に平面状のドレーン材挟持面４１ａが形成されている。   Further, a drain material holding surface 41 a having a planar shape is formed inside the L shape of the drain material pressing portion 41.

ドレーン材押し当て部４１の両側面部には、対称配置に可動支持部材４２，４２が固定用ボルト４４によって取り付けられ、可動支持部材４２がドレーン材押し当て部４１の側面部に対し、固定用ボルト４４を回動軸として回動可能に支持されている。   Movable support members 42 and 42 are attached to both side surfaces of the drain material pressing portion 41 in a symmetrical arrangement by fixing bolts 44, and the movable support member 42 is fixed to the side surface portion of the drain material pressing portion 41. 44 is supported so as to be rotatable about a rotation axis.

可動支持部材４２の互いに対向する端部内側面には、可動挟持部４３の端部が支持され、対称配置にある両可動支持部材４２，４２の端部間に可動挟持部４３が挟持される。   The end portions of the movable sandwiching portion 43 are supported on the inner surfaces of the end portions of the movable support member 42 facing each other, and the movable sandwiching portion 43 is sandwiched between the end portions of the two movable support members 42 and 42 in a symmetrical arrangement.

可動挟持部４３は、円柱状又は円筒状に形成され、その外周面がゴム状のシート材４５により被覆されている。   The movable clamping part 43 is formed in a columnar shape or a cylindrical shape, and its outer peripheral surface is covered with a rubber-like sheet material 45.

このチャック３１にＰＢＤ材１０の上端部を挟持させるには、ＰＢＤ材１０の上端部を可動挟持部４３のドレーン材挟持面４１ａとは反対側より可動挟持部４３の上半部に巻き付け、更にその先端部を互いに対向するドレーン材挟持面４１ａと可動挟持部４３との間の間隙に下向きに挿入する。   In order to clamp the upper end portion of the PBD material 10 on the chuck 31, the upper end portion of the PBD material 10 is wound around the upper half portion of the movable clamping portion 43 from the side opposite to the drain material clamping surface 41a of the movable clamping portion 43. The tip portion is inserted downward into the gap between the drain material clamping surface 41a and the movable clamping portion 43 facing each other.

この状態で駆動部材３２を動作させ、本体部４０を引き抜き方向に引き上げると、ＰＢＤ材１０に引っ張られて可動支持部材４２が回動し、両端が可動支持部材４２に支持された可動挟持部４３はドレーン材挟持面４１ａ側に移動し、ドレーン材挟持面４１ａと可動挟持部４３との間にＰＢＤ材１０の上端部、即ち撤去部１４の上端部を挟持する。   When the drive member 32 is operated in this state and the main body portion 40 is pulled up in the pulling direction, the movable support member 42 is rotated by being pulled by the PBD material 10, and the movable holding portion 43 having both ends supported by the movable support member 42. Moves to the drain material clamping surface 41 a side, and sandwiches the upper end portion of the PBD material 10, that is, the upper end portion of the removal portion 14, between the drain material clamping surface 41 a and the movable clamping portion 43.

このチャック３１では、可動挟持部４３の上半部にＰＢＤ材１０を巻付けた状態であるため、挟持した部分に応力が集中せずに、巻付けた部分に分散されるので切断し難くなっている。   In this chuck 31, since the PBD material 10 is wound around the upper half portion of the movable clamping portion 43, stress is not concentrated on the sandwiched portion, and is distributed to the wound portion, so that it is difficult to cut. ing.

尚、上述の実施例では、埋め捨て部を有するＰＢＤ材１０について説明したが、埋め捨て部を設けずに全体を撤去部とする構成としてもよい。   In the above-described embodiment, the PBD material 10 having the buried portion has been described. However, the entire portion may be a removed portion without providing the buried portion.

また、上述の実施例では、一対のドレーン部材を有し、両ドレーン部材を薄帯板状の引張補強材の表裏両面に互いに対称配置に固着したものについて説明したが、ドレーン部材を引張補強材の片面のみに固着させてもよい。   Further, in the above-described embodiment, the description has been given of the case where the drain member has a pair of drain members, and the drain members are fixed to each other in symmetrical arrangement on the front and back surfaces of the thin strip-like tensile reinforcing material. It may be fixed only on one side.

更に、上述の実施例では、引張補強材としてポリオレフィン系の合成樹脂材を延伸してシート状に成形したプラスチック帯状体を使用した例について説明したが、引張補強材には、帯状鋼板を使用してもよく、その場合、帯状鋼板からなる引張補強材の表裏両面又は片面に接着剤層を介してドレーン部材を固着させるようになっている。   Furthermore, in the above-described embodiment, an example in which a plastic strip formed by stretching a polyolefin-based synthetic resin material into a sheet shape is used as a tensile reinforcement, but a strip-shaped steel plate is used as the tensile reinforcement. In this case, the drain member is fixed to both the front and back surfaces or one surface of the tensile reinforcing material made of a strip-shaped steel plate via an adhesive layer.

更にまた、引張補強材は、ステンレス板等の金属板をもって構成してもよく、その場合も、引張補強材とドレーン部材との固着は接着剤をもって行うことが好ましい。   Furthermore, the tensile reinforcing material may be constituted by a metal plate such as a stainless steel plate, and in this case as well, it is preferable to fix the tensile reinforcing material and the drain member with an adhesive.

尚、薄帯板状の引張補強材としては、その他、網目状や透水孔を有するもの等のような十分な強度を有し且つ透水性を有するものであってもよい。   In addition, the ribbon-like tensile reinforcing material may have a sufficient strength and water permeability such as a mesh-like or water-permeable hole.

また、上述の実施例では、引張補強材を薄板帯状に形成したものについて説明したが、引張補強材を鋼製ワイヤー等の線状材をもって構成し、ドレーン部材の表裏両面の中央部及び／又は側部に、線状の引張補強材を長手方向に沿って固着させて一体化させたものでもよい。   Further, in the above-described embodiment, the tensile reinforcing material is described as being formed in a thin strip shape, but the tensile reinforcing material is constituted by a linear material such as a steel wire, and / or the center part of both the front and back surfaces of the drain member and / or A linear tensile reinforcement material may be fixed to the side portion along the longitudinal direction and integrated.

上述の実施例では、撤去部を構成するドレーン部材と、埋め捨て部を構成するドレーン材とを接続用当て板を用いて連結させた例について説明したが、撤去部及び埋め捨て部を構成するドレーン部材を一本のドレーン部材をもって構成し、そのドレーン部材の撤去部と埋め捨て部との境界部に切り込みを入れ、所定強度以上の荷重が作用すると撤去部と埋め捨て部とに分離するようにしてもよい。   In the above-described embodiment, the example in which the drain member that constitutes the removal portion and the drain material that constitutes the disposal portion are coupled by using the contact plate for connection has been described, but the removal portion and the disposal portion are configured. The drain member is composed of a single drain member, and a cut is made at the boundary between the drained portion of the drain member and the buried portion, so that the removed portion and the buried portion are separated when a load exceeding a predetermined strength is applied. It may be.

本発明に係るプラスチックボードドレーン材を示す側面図である。It is a side view which shows the plastic board drain material which concerns on this invention. 同上の部分拡大横断面図である。It is a partial expanded horizontal sectional view same as the above. 図１中の撤去部と埋め捨て部との接続部を示す正面図である。It is a front view which shows the connection part of the removal part and padding part in FIG. 同上の従断面図である。It is a secondary sectional view same as the above. 本発明に係るドレーン材の引き抜き装置を使用したドレーン抜去工程の概略を示す側面図である。It is a side view which shows the outline of the drain extraction process which uses the extraction apparatus of the drain material which concerns on this invention. 図５中のチャック部を示す側面図である。It is a side view which shows the chuck | zipper part in FIG.

符号の説明Explanation of symbols

１０ ＰＢＤ材
１１，１２ ドレーン部材
１３ 引張補強材
１４ 撤去部
１５ ドレーン部材（埋め捨て部）
１７ ラミネート層
１８ 浅通水用溝
１９ 深通水用溝
２０ 通水溝形成用心材
２１ 透水性フィルター
２２ 縦壁材
２３ 横壁材
２４ 接続用当て板
２５ かすがい
２６ ステープル
３０ 引き抜き装置
３１ チャック
３２ 引き上げ駆動部材
３３ クレーン
３４ 吊りワイヤ
３５ 支持リーダ
４０ 本体部
４１ ドレーン材押し当て部
４１ａ ドレーン材挟持面
４２ 可動支持部材
４３ 可動挟持部
４４ 固定用ボルト
４５ ゴム状シート材 10 PBD material 11, 12 Drain member 13 Tensile reinforcement 14 Removal part 15 Drain member (filled part)
DESCRIPTION OF SYMBOLS 17 Laminate layer 18 Shallow water channel 19 Deep water channel 20 Water channel forming core material 21 Permeable filter 22 Vertical wall material 23 Horizontal wall material 24 Connecting pad 25 Washing 26 Staple 30 Pulling device 31 Chuck 32 Lifting Drive member 33 Crane 34 Hanging wire 35 Support leader 40 Main body part 41 Drain material pressing part 41a Drain material clamping surface 42 Movable support member 43 Movable clamping part 44 Fixing bolt 45 Rubber-like sheet material

Claims (7)

通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状をした引張補強材とを有し、該引張補強材を長手方向に沿って前記ドレーン部材と一体化させてなる地盤改良後に撤去可能なプラスチックボードドレーン材。   A plastic drain member in which a water permeable filter is fixed to the front and back surfaces of the water groove forming core material having the water flow grooves continuously in the longitudinal direction of the front and back surfaces, and an open portion of the water flow groove is closed; A plastic board drain material having a strip-like plate-like or linear tensile reinforcement material, which can be removed after ground improvement by integrating the tensile reinforcement material with the drain member along the longitudinal direction. 引張補強材を薄帯板状とし、一対のドレーン部材を、前記引張補強材の表裏両面に互いに対称配置に固着してなる請求項１に記載のプラスチックボードドレーン材。   2. The plastic board drain material according to claim 1, wherein the tensile reinforcing material is formed into a thin strip plate shape, and a pair of drain members are fixed to each other in a symmetrical arrangement on both front and back surfaces of the tensile reinforcing material. 通水用溝を表裏の長手方向に連続して有する通水溝形成用心材の表裏に、前記通水用溝の開放部を閉鎖する配置に透水性フィルターを固着したプラスチック製のドレーン部材と、薄帯板状又は線状の引張補強材とを有し、該引張補強材を前記ドレーン部材の長手方向に沿って一体化させて構成される撤去部と、
該撤去部のドレーン部材の下端に連続配置されたドレーン部材からなる埋め捨て部とを有し、
該埋め捨て部の上端を撤去部の下端に対して、ドレーン材打設作業時に作用する通常の引っ張り力によっては離れないが、前記撤去部を撤去する際の抜去力によって離れる程度の結合力で連結してなる請求項１又は２に記載のプラスチックボードドレーン材。 A plastic drain member in which a water permeable filter is fixed to the front and back surfaces of the water groove forming core material having the water flow grooves continuously in the longitudinal direction of the front and back surfaces, and an open portion of the water flow groove is closed; A strip-shaped or linear tensile reinforcing material, and a removal portion configured by integrating the tensile reinforcing material along the longitudinal direction of the drain member;
And having a buried portion made of a drain member arranged continuously at the lower end of the drain member of the removal portion,
The upper end of the buried portion is not separated from the lower end of the removal portion by a normal pulling force that acts during the drain material placing operation, but with a binding force that is separated by the removal force when removing the removal portion. The plastic board drain material according to claim 1 or 2, wherein the plastic board drain material is connected. 引張補強材がポリオレフィン系の合成樹脂材を延伸してシート状に成形したプラスチック帯状材であり、該引張補強材に前記ドレーン部材を、合成樹脂ラミネート層を介して固着させてなる請求項１、２又は３に記載のプラスチックボードドレーン材。   The tensile reinforcing material is a plastic strip-like material obtained by stretching a polyolefin-based synthetic resin material into a sheet shape, and the drain member is fixed to the tensile reinforcing material via a synthetic resin laminate layer. The plastic board drain material according to 2 or 3. 引張補強材が帯状鋼板であり、該引張補強材に前記ドレーン部材を、接着剤層を介して固着させてなる請求項１、２又は３に記載のプラスチックボードドレーン材。   The plastic board drain material according to claim 1, 2 or 3, wherein the tensile reinforcing material is a belt-shaped steel plate, and the drain member is fixed to the tensile reinforcing material via an adhesive layer. 板状のドレーン材が挟持されるチャックと、該チャックに引き上げ力を与える引き上げ駆動部材とを有し、前記チャックは、前記引き上げ駆動部材によって動作される本体部と、該本体部から垂下され、表面にドレーン材挟持面を有するドレーン材押し当て部と、該ドレーン材押し当て部の両側部に対称配置にそれぞれ回動可能に支持された一対の可動支持部材と、該両可動軸支部に両端を支持させ前記ドレーン材挟持面に対し間隔を置いて配置された円筒状又は円柱状の可動挟持部とを備え、前記ドレーン材の上端部を前記可動挟持部の上半部外周に巻き付けるとともに前記ドレーン材挟持面と前記可動挟持部との間に下向きに挿入させるようにしてなるドレーン材の引き抜き装置。   A chuck in which a plate-like drain material is sandwiched, and a pulling drive member that applies a pulling force to the chuck, the chuck being suspended from the main body portion that is operated by the pulling drive member, A drain material pressing portion having a drain material clamping surface on the surface, a pair of movable support members that are rotatably supported on both sides of the drain material pressing portion in a symmetrical arrangement, and both ends on both movable shaft support portions A cylindrical or columnar movable sandwiching portion disposed at a distance from the drain material sandwiching surface, and winding the upper end of the drain material around the upper half of the movable sandwiching portion and An apparatus for pulling out a drain material which is inserted downward between a drain material clamping surface and the movable clamping portion. 可動挟持部は、外周をゴム状シート材により被覆した請求項６に記載のドレーン材の引き抜き装置。   The draining device pulling device according to claim 6, wherein the movable clamping portion has an outer periphery covered with a rubber-like sheet material.
JP2005012452A 2005-01-20 2005-01-20 Plastic board drain material Active JP4609793B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104846801A (en) * 2015-03-19 2015-08-19 南通大学 Plastic-drainage-plate soft soil roadbed processing construction method
WO2019187174A1 (en) * 2018-03-27 2019-10-03 正佳 近藤 Vacuum consolidation dredging method, tower air-tight loading caisson, and dedicated work ship

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JPH01174427U (en) * 1988-05-20 1989-12-12
JPH0641942A (en) * 1992-07-24 1994-02-15 Penta Ocean Constr Co Ltd Driving method for drain member
JPH11200356A (en) * 1998-01-14 1999-07-27 Chisso Corp Ground stabilizing agent
JP2002138456A (en) * 2000-11-02 2002-05-14 Penta Ocean Constr Co Ltd Soft ground improvement method by vacuum consolidation
JP2002266340A (en) * 2001-03-08 2002-09-18 Unitika Ltd Drain material and method for accelerating decomposition thereof
JP2005325674A (en) * 2004-04-14 2005-11-24 Sekisui Chem Co Ltd Draining material

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Publication number Priority date Publication date Assignee Title
JPH01174427U (en) * 1988-05-20 1989-12-12
JPH0641942A (en) * 1992-07-24 1994-02-15 Penta Ocean Constr Co Ltd Driving method for drain member
JPH11200356A (en) * 1998-01-14 1999-07-27 Chisso Corp Ground stabilizing agent
JP2002138456A (en) * 2000-11-02 2002-05-14 Penta Ocean Constr Co Ltd Soft ground improvement method by vacuum consolidation
JP2002266340A (en) * 2001-03-08 2002-09-18 Unitika Ltd Drain material and method for accelerating decomposition thereof
JP2005325674A (en) * 2004-04-14 2005-11-24 Sekisui Chem Co Ltd Draining material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104846801A (en) * 2015-03-19 2015-08-19 南通大学 Plastic-drainage-plate soft soil roadbed processing construction method
WO2019187174A1 (en) * 2018-03-27 2019-10-03 正佳 近藤 Vacuum consolidation dredging method, tower air-tight loading caisson, and dedicated work ship

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