JP2018028203A - Bag body for engineering works, and method for installation of bag-shaped foot protection material using the same - Google Patents
Bag body for engineering works, and method for installation of bag-shaped foot protection material using the same Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 9
- 238000009434 installation Methods 0.000 title 1
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 229920003002 synthetic resin Polymers 0.000 claims description 23
- 239000000057 synthetic resin Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 3
- 238000003786 synthesis reaction Methods 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 15
- 238000005299 abrasion Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 229920001225 polyester resin Polymers 0.000 description 3
- 239000004645 polyester resin Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Abstract
Description
本発明は土木工事用袋体およびそれを用いた袋型根固め材の施行方法に関する。 The present invention relates to a civil engineering bag and a method for enforcing a bag-type root hardening material using the same.
土木工事においては、袋型根固め材が用いられることが多い。袋型根固め材は、ポリエステル樹脂などの合成樹脂製の繊維にて構成された網状体にて袋体が形成され、この袋体に玉石などの中詰め材が充填されて封止されたものである（特許文献１）。この袋型根固め材が、護岸土木工事の現場などに設置される。 In civil engineering work, bag-type root hardening materials are often used. The bag-type root hardening material is a bag made of a net made of synthetic resin fibers such as polyester resin, and filled with filling material such as cobblestone and sealed. (Patent Document 1). This bag-type root hardening material is installed at the site of revetment engineering works.
しかし、たとえば川底などの現場に設置した後に、水流などの影響により袋体の内部で中詰め材が移動すると、それによって、袋体を形成する網状体に摩耗が生じやすいなどの問題点がある。 However, for example, if the filling material moves inside the bag body due to the influence of water flow after being installed on the riverbed or the like, there is a problem that the mesh body forming the bag body is likely to be worn. .
そこで本発明は袋体が摩耗しにくい袋型根固め材を得ることを目的とする。また本発明は、袋体が摩耗しにくい袋型根固め材を容易に施行できるようにすることを目的とする。 Therefore, an object of the present invention is to obtain a bag-type root hardening material in which a bag body is less likely to be worn. Another object of the present invention is to make it possible to easily implement a bag-type root hardening material that does not easily wear the bag.
この目的を達成するため本発明の土木工事用袋体は、合成樹脂繊維にて構成された網状体と、この網状体を構成する前記合成樹脂繊維に被覆された硬質ポリウレタン樹脂とを含んで袋状に形成され、前記硬質ポリウレタン樹脂は水分の存在下で硬化したものであることを特徴とする。 In order to achieve this object, a civil engineering bag according to the present invention includes a mesh body made of synthetic resin fibers and a hard polyurethane resin coated with the synthetic resin fibers constituting the mesh body. And the hard polyurethane resin is cured in the presence of moisture.
本発明の袋型根固め材の施行方法は、
（イ）合成樹脂繊維にて構成された網状体にて形成された袋体の内部に、玉石などの中詰め材を充填することと、
（ロ）水分の存在下で硬化可能な硬質ポリウレタン樹脂を袋体に付与して、前記袋体の網状体を構成する合成樹脂繊維を硬質ポリウレタン樹脂にて被覆することと、
（ハ）前記硬質ポリウレタン樹脂に水分を付与して硬化させることとを、
（イ）（ロ）（ハ）の順序と、（ロ）（イ）（ハ）の順序と、（ロ）（ハ）（イ）の順序とのいずれかで実行することを特徴とする。
The method of enforcing the bag-type rooting material of the present invention is:
(A) filling the inside of a bag formed of a net made of synthetic resin fibers with a filling material such as cobblestone,
(B) Giving a hard polyurethane resin curable in the presence of moisture to the bag, and covering the synthetic resin fibers constituting the network of the bag with the hard polyurethane resin;
(C) imparting moisture to the hard polyurethane resin and curing it;
(B) (b) (c), (b) (b) (c), and (b) (c) (b).
本発明の他の袋型根固め材の施行方法は、合成樹脂繊維にて構成された網状体にて形成された袋体の内部に、玉石などの中詰め材を充填し、次に水分の存在下で硬化可能な硬質ポリウレタン樹脂を袋体および中詰め材に付与して、前記袋体の網状体を構成する合成樹脂繊維および中詰め材を硬質ポリウレタン樹脂にて被覆し、その後に前記硬質ポリウレタン樹脂に水分を付与して硬化させることを特徴とする。 Another method of enforcing a bag-type root-solidifying material of the present invention is to fill a bag formed of a net formed of synthetic resin fibers with a filling material such as cobblestone, and then A hard polyurethane resin that can be cured in the presence is applied to the bag body and the filling material, and the synthetic resin fibers and the filling material that form the mesh body of the bag body are covered with the hard polyurethane resin, and then the hard polyurethane resin is coated. It is characterized by imparting moisture to the polyurethane resin and curing it.
本発明の袋型根固め材の施行方法によれば、土木工事現場において硬質ポリウレタン樹脂に水分を付与して硬化させることが好ましい。 According to the enforcement method of the bag-type root hardening material of this invention, it is preferable to give water | moisture content to a hard polyurethane resin and to harden it in a civil engineering construction site.
本発明の土木工事用袋体によれば、網状体を構成する合成樹脂繊維が硬質ポリウレタン樹脂により被覆されているため、硬質ポリウレタン樹脂によって網状体の耐摩耗性を向上させることができ、これによって袋体が摩耗しにくい袋型根固め材を得ることができる。 According to the civil engineering bag of the present invention, since the synthetic resin fibers constituting the mesh body are covered with the hard polyurethane resin, the hard polyurethane resin can improve the abrasion resistance of the mesh body. It is possible to obtain a bag-type root hardening material in which the bag body is not easily worn.
本発明の袋型根固め材の施行方法によれば、袋体の網状体を構成する合成樹脂繊維に被覆された硬質ポリウレタン樹脂に水分を付与するだけで、この硬質ポリウレタン樹脂を硬化させることができ、このため袋型根固め材を容易に施行することができる。袋体に水分を付与するだけで硬質ポリウレタン樹脂を硬化させることができるため、海浜や河川などの水場の土木工事現場において袋型根固め材を容易に施行することができる。 According to the method of enforcing the bag-type root hardening material of the present invention, it is possible to cure the hard polyurethane resin simply by imparting moisture to the hard polyurethane resin covered with the synthetic resin fibers constituting the mesh body of the bag. For this reason, a bag-type root hardening material can be easily enforced. Since the hard polyurethane resin can be hardened only by applying moisture to the bag body, the bag-type rooting material can be easily enforced at the construction site of a water field such as a beach or a river.
図１は、本発明の実施の形態の土木工事用袋体１を示す。この袋体１は、図示のようにネット体によって逆円錐形に形成されている。２はその上端開口である。上端開口２を形成する網状体の周縁には、ロープ状体などによって、周方向に間隔をおいた複数位置に吊り輪３が形成されている。 FIG. 1 shows a civil engineering bag 1 according to an embodiment of the present invention. The bag body 1 is formed in an inverted cone shape by a net body as shown in the figure. Reference numeral 2 denotes the upper end opening. Suspension rings 3 are formed at a plurality of positions spaced in the circumferential direction by a rope-like body or the like on the periphery of the net-like body that forms the upper end opening 2.
土木工事用袋体１の使用時には、上端開口２から袋体１の内部に、図２に示す玉石や割り石やコンクリート塊などの中詰め材４を充填する。そして、そのうえで、吊り輪３を金属製のリング５に通してまとめることで、袋体１の上端開口２を閉じる。クレーンなどにてリング５を吊ることで、中詰め材４を充填して上端開口２が閉じられた状態の袋体１を現場に施工することができる。 When the civil engineering bag 1 is used, a filling material 4 such as a cobblestone, quarry stone, or concrete lump shown in FIG. 2 is filled into the bag 1 from the upper end opening 2. Then, the upper end opening 2 of the bag body 1 is closed by putting the suspension ring 3 through the metal ring 5 and collecting them together. By hanging the ring 5 with a crane or the like, it is possible to construct the bag 1 in a state where the filling material 4 is filled and the upper end opening 2 is closed.
袋体１を構成する網状体は、合成樹脂繊維にて構成されている。そして、この網状体を構成する合成樹脂繊維が、硬質ポリウレタン樹脂にて被覆されている。それによって、網状体の耐摩耗性を向上させることができる。 The mesh body constituting the bag body 1 is composed of synthetic resin fibers. And the synthetic resin fiber which comprises this net-like body is coat | covered with the hard polyurethane resin. Thereby, the abrasion resistance of the mesh body can be improved.
合成樹脂繊維は、本発明の袋体のような土木資材の用途のための適宜のものを使用することができる。たとえば、ポリエチレンテレフタレート繊維や、芯部に高粘度ポリエステル樹脂を配するとともに鞘部に低融点の結晶性ポリエステル樹脂を配した、高強力タイプの芯鞘複合繊維や、これらポリエチレンテレフタレート繊維と高強力タイプの芯鞘複合繊維とを混合させた繊維などを用いることができる。繊維の形態は、マルチフィラメントやモノフィラメントなどの任意のものとすることができる。繊維の繊度も用途に応じた任意のものとすることができる。 As the synthetic resin fiber, an appropriate one for the use of civil engineering materials such as the bag of the present invention can be used. For example, polyethylene terephthalate fiber, high-strength type core-sheath composite fiber with high-viscosity polyester resin in the core and low-melting crystalline polyester resin in the sheath, and these polyethylene terephthalate fibers and high-strength type The fiber etc. which mixed these core-sheath composite fibers can be used. The form of the fiber can be any one such as a multifilament or a monofilament. The fineness of the fiber can also be any depending on the application.
上述の繊維をたとえばラッセル編みすることによって、適宜の目明きの所要の網状体とすることができる。 For example, the above-described fiber can be knitted into a raschel to obtain a desired mesh having a suitable aperture.
網状体を構成する合成樹脂繊維を被覆する硬質ポリウレタン樹脂は、水分の存在下で硬化するものであることが必要である。水分の存在下で硬化するポリウレタン樹脂であることにより、土木工事の施工現場で網状体に容易に塗布し水分の付与により硬化させることができる。あるいは、あらかじめ合成樹脂繊維に塗布され乾燥されてこの合成樹脂繊維を被覆しているポリウレタン樹脂を、土木工事の施工現場で容易に硬化させることもできる。さらにポリウレタン樹脂を硬化させた後の袋体１に中詰め材４を充填することもできる。 The hard polyurethane resin that coats the synthetic resin fibers constituting the network is required to be cured in the presence of moisture. By being a polyurethane resin that cures in the presence of moisture, it can be easily applied to a mesh body at the construction site of civil engineering work and cured by application of moisture. Alternatively, the polyurethane resin that has been applied to the synthetic resin fiber in advance and dried to coat the synthetic resin fiber can be easily cured at the construction site of civil engineering work. Furthermore, the filling material 4 can be filled into the bag body 1 after the polyurethane resin is cured.
たとえば、施工現場で袋体１に中詰め材４を充填し、その後にポリウレタン樹脂の塗布加工を施し、適当に乾燥させた後に河川などの水中に浸漬させることで、一気に硬化させることができる。これによって、袋体１における網状体を構成する合成樹脂繊維が硬質ポリウレタン樹脂により被覆されることになるため、袋体１の耐摩耗性を向上させることができる。 For example, the filling material 4 is filled in the bag body 1 at the construction site, and then the polyurethane resin is applied, dried appropriately, and then immersed in water such as a river to be cured at once. Thereby, since the synthetic resin fiber which comprises the net-like body in the bag body 1 is coat | covered with a hard polyurethane resin, the abrasion resistance of the bag body 1 can be improved.
あるいは、ポリウレタン樹脂を被覆しておいた袋体１に中詰め材４を充填し、その後にポリウレタン樹脂に水分を付与して硬化させてもよい。さらにポリウレタン樹脂による被覆と同樹脂の硬化とを終えた袋体１に中詰め材４を充填することもできる。 Alternatively, the filling material 4 may be filled in the bag body 1 coated with the polyurethane resin, and then the polyurethane resin may be given moisture to be cured. Furthermore, the filling material 4 can also be filled in the bag body 1 that has been covered with the polyurethane resin and has been cured.
ポリウレタン樹脂加工は、網状体のみに施すこともできるし、網状体に限らず、その内部に充填された中詰め材４にも施すことができる。中詰め材４にもポリウレタン樹脂を被覆させることで、多数の中詰め材４同士が相互に固定されることになる。これによって袋体１の内部で中詰め材４が動くことが防止されるため、網状体の耐摩耗性をさらに向上させることができる。 The polyurethane resin processing can be applied only to the mesh body, and can be applied not only to the mesh body but also to the filling material 4 filled therein. By covering the filling material 4 with the polyurethane resin, a large number of filling materials 4 are fixed to each other. This prevents the filling material 4 from moving inside the bag body 1, so that the abrasion resistance of the mesh body can be further improved.
ポリウレタン樹脂の塗布量は、ポリウレタン樹脂の乾燥後の質量が、合成樹脂繊維の質量の１０〜３０％となるような量であることが好ましい。塗布すべきポリウレタン樹脂は、水系と溶剤系とのうちの任意のものを使用することができる。 The amount of the polyurethane resin applied is preferably such that the mass of the polyurethane resin after drying is 10 to 30% of the mass of the synthetic resin fiber. As the polyurethane resin to be applied, any of a water system and a solvent system can be used.
ポリエチレンテレフタレート繊維にて構成されたマルチフィラメント（１６７０デシテックス、１９２フィラメント）を用い、ラッセル編機で編構成が１０本格になるように網状の編地を作製することで、目合い２５ｍｍの網状体を得た。この網状体を図１に示すように加工することで、本発明の実施例の土木工事用袋体を構成するための繊維状の袋状構造体を得た。 Using a multifilament (1670 decitex, 192 filament) composed of polyethylene terephthalate fiber, a mesh-like knitted fabric is produced with a raschel knitting machine so that the knitting structure becomes 10 full-scale. Obtained. By processing this net-like body as shown in FIG. 1, a fibrous bag-like structure for constituting the civil engineering bag of the example of the present invention was obtained.
この袋状構造体に中詰め材を充填せずに、以下のようにしてポリウレタン樹脂加工を施した。 Without filling the bag-like structure with the filling material, the polyurethane resin was processed as follows.
実施例１ Example 1
ポリウレタン樹脂として、水系樹脂を用いた。詳細には、大田化研社製の品番「ＮＹＬＯＦＩＸ ＡＧ−８」を用い、これに同社製の硬化剤８質量％を添加したものを使用した。そして、網状体の質量に対して乾燥後の質量が１６％となるように塗布し、乾燥させた後に水中に約３分間浸漬させることにより水分を付与して硬化させることで、網状体を構成する繊維を硬質ポリウレタン樹脂にて被覆した。 A water-based resin was used as the polyurethane resin. Specifically, a product number “NYLOFIX AG-8” manufactured by Ota Chemical Co., Ltd. was used, and a product obtained by adding 8% by mass of a curing agent manufactured by the same company was used. And it apply | coats so that the mass after drying may be 16% with respect to the mass of a net-like body, and after making it dry, it immerses in water for about 3 minutes, gives a water | moisture content, and comprises a net-like body. The fibers to be coated were coated with a hard polyurethane resin.
実施例２ Example 2
ポリウレタン樹脂として、溶剤系樹脂を用いた。詳細には、大田化研社製の品番「ＮＹＬＯＦＩＸ Ｋ−３Ｅ」を使用した。そして、網状体の質量に対して乾燥後の質量が２０％となるように塗布し、乾燥させた後に水中に約３分間浸漬させることにより水分を付与して硬化させることで、網状体を構成する繊維を硬質ポリウレタン樹脂にて被覆した。 A solvent-based resin was used as the polyurethane resin. Specifically, a product number “NYLOFIX K-3E” manufactured by Ota Chemical Research Co., Ltd. was used. And it apply | coats so that the mass after drying may be 20% with respect to the mass of a net-like body, and after making it dry, it immerses in water for about 3 minutes, gives a water | moisture content, and comprises a net-like body. The fibers to be coated were coated with a hard polyurethane resin.
比較例
上述の袋状構造体にポリウレタン樹脂加工を施さないものとした。
Comparative Example The above bag-like structure was not subjected to polyurethane resin processing.
実施例１、２および比較例のものを供試体として、ボールミル耐摩耗性試験を実施した。この耐摩耗性試験は、水平方向に配置された内径３０ｃｍの円筒ドラム状の回転式の試験装置の内周面に沿って供試体を配置し、試験装置の内部に直径５ｃｍ、質量約２５５ｇのアルミナボールを複数個投入し、さらにドラム容積に対して２０分の１に相当する量の水道水を投入し、試験装置を回転速度３２ｒｐｍで３４時間運転した。運転終了後に供試体を試験装置から取り出して、その外観を目視にて観察した。 A ball mill wear resistance test was performed using the samples of Examples 1 and 2 and the comparative example. In this abrasion resistance test, a specimen is placed along the inner peripheral surface of a cylindrical drum-shaped rotating test device having an inner diameter of 30 cm arranged in a horizontal direction, and the test device has a diameter of 5 cm and a mass of about 255 g. A plurality of alumina balls were added, and tap water equivalent to 1/20 of the drum volume was added, and the test apparatus was operated at a rotational speed of 32 rpm for 34 hours. After the operation was completed, the specimen was taken out from the test apparatus, and its appearance was visually observed.
その結果、比較例のものは、図３に示すように供試体が激しく摩耗しており、場所によっては網状体を構成する繊維が擦り切れる寸前まで摩耗していた。 As a result, in the comparative example, the specimen was severely worn as shown in FIG. 3, and depending on the location, the fiber constituting the mesh was worn just before it was worn out.
これに対し、図４に示す実施例１のものと、図５に示す実施例２のものは、網状体を構成する繊維の表面がわずかに摩耗しただけであり、比較例のものに比べて格段の耐摩耗性を示した。 On the other hand, in the example 1 shown in FIG. 4 and the example 2 shown in FIG. 5, the surface of the fibers constituting the mesh body was only slightly worn, compared to the comparative example. Remarkable wear resistance.
別の耐摩耗性試験として、学振形摩耗試験機（摩擦試験機II形）を用いて、サンドペーパー（ＣＣ−１００）を摩擦用布として使用し、摩擦試験を行って、強度保持率測定試験を行った。試験条件は、ＪＩＳ Ｌ ０８４９に準じ、毎分３０回往復の速度とし、８００回往復摩耗させた。摩耗試験前の引張強度と、摩耗試験後の引張強度とを測定し、それらの結果から強度保持率を計算した。なお、引張強度測定にあたっては、ＪＩＳ Ａ ８９６０に準じ、試料を１本２節の状態として定速伸長型引張試験機を用いて測定した。 As another abrasion resistance test, using a Gakushin type abrasion tester (friction tester type II), using sandpaper (CC-100) as a friction fabric, conducting a friction test, and measuring strength retention A test was conducted. The test conditions were set to 30 reciprocations per minute according to JIS L 0849, and 800 reciprocating wears were made. The tensile strength before the abrasion test and the tensile strength after the abrasion test were measured, and the strength retention was calculated from the results. The tensile strength was measured in accordance with JIS A 8960 using a constant-speed extension type tensile tester with each sample in a two-section state.
測定結果を表１に示す。 The measurement results are shown in Table 1.
表１に示すように、実施例１および２は、比較例に比べて強度保持率が高いものであった。 As shown in Table 1, Examples 1 and 2 had higher strength retention than the comparative example.
Claims (4)
（ロ）水分の存在下で硬化可能な硬質ポリウレタン樹脂を袋体に付与して、前記袋体の網状体を構成する合成樹脂繊維を硬質ポリウレタン樹脂にて被覆することと、
（ハ）前記硬質ポリウレタン樹脂に水分を付与して硬化させることとを、
（イ）（ロ）（ハ）の順序と、（ロ）（イ）（ハ）の順序と、（ロ）（ハ）（イ）の順序とのいずれかで実行することを特徴とする袋型根固め材の施行方法。 (A) filling the inside of a bag formed of a net made of synthetic resin fibers with a filling material such as cobblestone,
(B) Giving a hard polyurethane resin curable in the presence of moisture to the bag, and covering the synthetic resin fibers constituting the network of the bag with the hard polyurethane resin;
(C) imparting moisture to the hard polyurethane resin and curing it;
A bag characterized by being executed in any of the following order: (b) (b) (c), (b) (b) (c), or (b) (c) (b) Enforcement method of mold rooting material.
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