JP4260039B2 - CUTTING MEMBER AND MANUFACTURING METHOD THEREOF - Google Patents

Description

  The present invention relates to a cuttable member made of a high-strength fiber reinforced resin (FRP) material and a method for producing the same, and for example, a shield machine starting or reaching shaft retaining wall, and an underground structure such as a continuous underground wall. It is used to build.

  As a shaft for starting or reaching the shield machine, for example, as shown in FIG. 6, reinforcement that can cut the start portion 20 a (or the reaching portion) of the retaining wall 20, in particular, the shield machine 21 by the cutter 21 a of the shield machine 21. A shaft constructed of concrete is known.

The starting part 20a in this case is a reinforcing plastic material (Nomst member (trade name)) impregnated with an aggregate that can be cut by the cutter 21a of the shield machine 21 and a carbon fiber material having high strength and a large Young's modulus. It is constructed from reinforced concrete used in
JP 05-302490 A Japanese Patent Laid-Open No. 01-203590

  However, there are some problems to be solved in the construction method of the retaining wall constructed by using the Nomst member instead of the reinforcing bar as described below.

  Since the Nomst member generally has a large tensile property, if the concrete that becomes the compression material has high strength together with the Nomst member, the cutting by the cutter 21a of the shield machine 21 is not easy, and difficult construction is forced.

  In addition, since the Nomst member is a member that is integrated with concrete and resists cross-sectional force in the same way as a reinforcing bar, adhesion to the concrete is required to the same extent as the reinforcing bar. High construction accuracy is required.

  In addition, since the nomst member is formed into a rod shape by resin impregnation, the cutting piece is cut into a relatively long rod shape of several tens of centimeters during cutting, which may cause clogging in the shield machine chamber, piping, pump, etc. Sometimes

  In addition, a new material (FFU (trade name)) in which a thermosetting resin foam (rigid urethane resin) is reinforced with long glass fibers is also used as an alternative to this type of Nomst member, but it is laminated in a plate shape. Therefore, there is a problem that not only the strength is inferior to that of the Nomst member, but also the manufacturing cost is high and the reinforcing effect in the circumferential direction is small because the long fibers are arranged in one direction.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cutable member that can be easily manufactured and can be cut extremely efficiently, and a method for manufacturing the same.

The cuttable member according to claim 1 is a cuttable member used for constructing an underground structure, and is arranged in one direction with a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin. A long fiber reinforced resin layer part impregnated with a long fiber material is laminated in a plurality of layers, and the short fiber reinforced resin layer part is laminated on the outermost side and integrally formed. Is.

  The cutable member according to claim 2 is a cuttable member used for constructing an underground structure, and is arranged in one direction with a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin. A long fiber reinforced resin layer part impregnated with a long fiber material is laminated in a plurality of layers, and is integrally formed into a hollow cross-sectional shape.

  In general, members for constructing underground structures are particularly required to have strength in the axial direction, and strength in the direction perpendicular to the axis is not so required. However, when a retaining wall constructed of a cutable member made of FRP material reinforced only in one direction is cut with a shield machine, the FRP material is cut into a relatively long bar shape of several tens of centimeters. Various problems occur, such as clogging chambers, piping, and pumps, or entanglement with cutter bits of shield machines.

  On the other hand, the above-mentioned problem does not occur even if the retaining wall constructed of a cutable member made of FRP material reinforced in two directions is cut with a shield machine, but the strength of the retaining wall is more than necessary. Since it is necessary to cut the long fibers themselves more on the top, there is a problem that the workability in the time-consuming work for the cutting is lowered.

  The invention described in claims 1 and 2 includes a fiber reinforced resin layer portion reinforced by randomly arranged short fiber materials and a fiber reinforced resin layer portion reinforced by long fiber materials arranged in the axial direction of the cuttable member. The above-mentioned problems can be solved by laminating a plurality of layers, and cutting can be performed very efficiently. Especially, the content of the short fiber material is 50% or less, and the internal pressure molded cutable member can be cut. In this case, the machinability is higher because it is formed into a bolus state.

  Here, the internal pressure molding means that a short fiber reinforced resin layer portion and a long fiber reinforced resin layer portion laminated in a plurality of layers are placed in a mold and, for example, vapor pressure is applied from the inside of these resin layer portions to form a mold. A method of heating and molding while compressing with a mold and vapor pressure.

In addition, since the fiber reinforced resin layer portion reinforced with the short fiber material is interposed between the fiber reinforced resin layer portions reinforced with the long fiber material, the resin layer portion reinforced with the short fiber material by the sandwich structure is provided. The bending rigidity can be increased by that amount. As a result, it is reinforced not only in the arrangement direction of the long fiber material but also in the arbitrary direction by the short fiber material, so that the sectional force can be dispersed not only in the unidirectional plate but also in the two directions and the arbitrary direction. .
Furthermore, since the amount of the long fiber and the short fiber can be arbitrarily combined, the manufacturing cost can be reduced by the optimal amount arrangement corresponding to the required cross-sectional performance.

  In this case, various fiber reinforced resin layer portions can be formed by a combination of a resin material serving as a base material and a fiber material serving as a reinforcing material. In particular, a fiber reinforced resin material comprising an unsaturated polyester resin and glass fiber. Is suitable for its high machinability, easy handling and high design freedom. Long fiber materials and short fiber materials are widely used as reinforcing materials for concrete, and in addition to glass fibers, carbon fibers, vinylon fibers, and the like can be used.

  In particular, the invention according to claim 2 is lightweight and easy to handle because it is hollow, and the workability is very good. In addition, it is easy to attach post-fixed anchors such as chemical anchors and hole-in anchors, so it is also possible to directly attach entrance packings, brackets, etc. In addition, joining with shape steel such as H-shaped steel is also possible with adhesives. In addition to being possible, tightening with bolts can also be performed effectively.

  A cuttable member according to claim 3 is the cuttable member according to claim 1 or 2, wherein the short fiber reinforced resin layer portions and the long fiber reinforced resin layer portions are alternately laminated. Is. By alternately laminating the short fiber reinforced resin layer portions and the long fiber reinforced resin layer portions, unevenness due to manufacturing defects or the like is hardly generated in the cross section density, and the necessary cross sectional strength is obtained.

  In general, when a plate reinforced with long fiber material is cut with a shield machine, the long fiber material may be dragged by the cutter bit on the back surface, and the surface layer may be peeled off, resulting in large fragments. Even if the cutter bit penetrates the reinforced plate, the fiber material is short, so that the above-described problems hardly occur.

  Therefore, by reinforcing the reinforcing resin layer portion reinforced with short fibers as in the present invention, the reinforcing resin layer portion reinforced with long fibers is cut with the long fibers constrained on the back surface. Therefore, it is not dragged by the cutter bit as described above, and peeling does not occur.

A cuttable member according to claim 4 is the cuttable member according to any one of claims 1 to 3 , wherein the short fiber reinforced resin layer portion and the long fiber reinforced resin layer portion are subjected to normal temperature treatment, heat treatment, or light treatment. Thus, they are formed integrally.

  As room temperature treatment in this case, the short fiber reinforced resin layer portion and the long fiber reinforced resin layer portion laminated in a plurality of layers are placed in a mold and the above-described internal pressure molding is performed, and the short fibers and A treatment such as compressing with a mold and air pressure by applying air pressure from the inside of the long fiber resin layer portion can be applied.

  In addition, as the heat treatment, when the above-mentioned internal pressure molding is performed by putting the short fiber reinforced resin layer portion and the long fiber reinforced resin layer portion laminated in a plurality of layers into the mold, steam is generated from the inside of the short fiber and long fiber resin layer portion. It is possible to apply a process such as heating and compressing with a mold and vapor pressure by applying pressure.

And as an optical treatment, when short pressure fiber reinforced resin layer portions and long fiber reinforced resin layer portions laminated in a plurality of layers are put into a mold and the above-mentioned internal pressure molding is performed, short fibers and long fiber resin layer portions are arranged inside A process such as irradiating ultraviolet rays or the like can be applied.
A cuttable member according to a fifth aspect is the cuttable member according to any one of the second to fourth aspects, wherein the hollow portion is filled with a filling material.

  In the case of the present invention, since the hollow portion is filled with a solidifying material such as mortar or concrete having an appropriate strength as a filling material, the strength on the compression side can be further increased with respect to the bending load. A sudden drop in the compressive strength in the processed part can be prevented.

  In particular, it is strengthened by a short fiber reinforced resin layer part in which short fibers arranged at random are impregnated with resin, so that an external force acting in a direction perpendicular to the axis (a direction perpendicular to the arrangement direction of the long fibers) is applied. However, it is much stronger than those reinforced only with long fibers, so it can be formed hollow, and even if formed hollow, it will not be deformed or destroyed by side pressure, and thus, for example, propelling a shield machine It can also be used as a reaction force receiver for propulsion jacks.

Basically, in either case of hollow or solid, it can be molded so as to have a cross-sectional performance corresponding to the cross-sectional shape and to resist external force. For example, when it is necessary to maintain a cross-section with a thin thickness, it can be dealt with by filling low-strength concrete, filling and solidifying glass waste with a solidifying material, or inserting and solidifying wood chips and the like. it can. In this case, it is not particularly necessary to attach or integrate the reinforcing resin layer portion and the solidifying material. Further, the filling material is not limited to a solidified material such as concrete or mortar, and may be brick or bamboo.
A cuttable member according to a sixth aspect is the cuttable member according to any one of the first to fifth aspects, wherein the surface is formed in an uneven surface.

  In the case of the present invention, since the surface of the cutter bit has an uneven surface, the cutting edge of the cutter bit is easily caught, so that cutting becomes easy. In addition, the unevenness | corrugation on the surface can be easily formed in the manufacturing process of a cuttable member, or another process after manufacturing.

The method for producing a cuttable member according to claim 7 is a method for producing a cuttable member used for constructing an underground structure, and a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin; A long fiber reinforced resin layer portion in which a long fiber material arranged in one direction is impregnated with a resin is laminated in a plurality of layers and wound around a core material to be integrally formed.

The method for producing a cuttable member according to claim 8 is a method for producing a cuttable member used for constructing an underground structure, and a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin; A plurality of long fiber reinforced resin layer portions impregnated with resin in a long fiber material arranged in one direction are laminated and wound around a core material, and are integrally formed in a hollow cross-sectional shape.

The invention according to claim 7 and claim 8 comprises a short fiber reinforced resin layer portion obtained by impregnating a short fiber material with a resin, and a long fiber reinforced resin layer portion obtained by impregnating a long fiber material arranged in one direction with a resin. By laminating a plurality of layers and winding them around the core material in a roll shape, a cutable member such as a pile can be manufactured very efficiently.

  In this case, as the core material, a rod-shaped member made of a scrap material such as a ceramic material such as pottery, a brick, a corner angle, a shaped steel, or a used sleeper can be used. Further, by appropriately selecting a core material and a mold, not only a circular cross section and a rectangular cross section, but also a cuttable member having an arbitrary cross section shape, and further a cut member having a curved shape can be easily manufactured. Moreover, the cutting member of arbitrary diameters can be manufactured by setting suitably the frequency | count of winding of a resin layer part.

  The method for manufacturing a cuttable member according to the present invention includes a short fiber reinforced resin layer part in which a short fiber material is impregnated with a resin, and a long fiber reinforced resin layer in which a long fiber material arranged in one direction is impregnated with a resin. By laminating the parts in a plurality of layers, winding them around the core material in a roll shape, and forming them integrally by heat treatment or the like, it is possible to manufacture a cutable member such as a cutable pile extremely efficiently.

  The cuttable member according to the present invention includes a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin, and a long fiber reinforced resin layer portion in which a long fiber material arranged in one direction is impregnated with a resin. Since it is formed by laminating multiple layers, the cutting performance is very good when cutting with a shield machine, and the cut pieces clog the chamber and piping of the shield machine, as well as the pump, or the cutter bit of the shield machine. There will be no problems such as entanglement.

  Also, if fillers such as calcium carbonate are filled in addition to short fibers in the reinforcing resin layer portion reinforced with short fibers, the stickiness of the resin material will decrease, so even if it is cut with a shield machine, the long fiber material will remain on the back side. Problems such as being dragged by the cutter bit and peeling off the surface layer to produce large fragments are unlikely to occur.

  In addition, because it is formed in a hollow cross section, it is lightweight and easy to handle, and the workability is very good, and it is easy to install post-fixed anchors such as chemical anchors and hole-in anchors. In addition, there is an effect that bolts can be effectively tightened even in joining with a shape steel such as an H-shaped steel.

  FIGS. 1A to 1B show an example of the present invention. In the drawing, a cuttable pile 1 (hereinafter referred to as “pile 1”) is a short fiber reinforced resin layer portion 2 in which a short fiber material is impregnated with a resin. (Hereinafter referred to as “reinforcing resin sheet 2”) and a long fiber reinforced resin layer portion 3 (hereinafter referred to as “reinforcing resin sheet 3”) obtained by impregnating a long fiber material arranged in the axial direction of the pile with resin. It is formed in a rectangular cross-sectional shape or a hollow circular cross-sectional shape (not shown).

  The reinforced resin sheet 2 and the reinforced resin sheet 3 are both formed into a sheet shape or a plate shape by impregnating a glass fiber with an unsaturated polyester resin. In particular, the glass fiber of the reinforced resin sheet 2 includes a glass short fiber and a reinforced resin sheet. Long glass fibers are used for the three glass fibers, and the long glass fibers are arranged in the axial direction of the pile 1. The reinforcing resin sheet 2 is mixed with calcium carbonate as a filler.

  Further, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are alternately laminated in a plurality of layers and wound in a roll shape, and the reinforcing resin sheet 2 is laminated on the outermost side, and is laminated in a plurality of layers. The reinforcing resin sheet 2 and the reinforcing resin sheet 3 wound around are integrally formed into a rectangular hollow cross-sectional shape by heating in a mold.

  FIG. 1 (b) shows a machinable pile in which the hollow portion 4 is filled with a solidifying material 5 such as mortar or concrete as a filling material, and FIG. 1 (c) is a diagram of FIG. 1 (a). ) Or (b) shows a machinable pile that has been diameter-expanded by tying together a plurality of the cut piles 1 shown in FIG.

  Next, the method for manufacturing a cuttable member according to the present invention will be described by taking as an example the case of manufacturing a cuttable pile (see FIGS. 2 and 3).

  First, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are formed. Both the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are formed into a sheet shape by impregnating a glass fiber with an unsaturated polyester resin. In particular, short glass fibers are used for the glass fibers of the reinforced resin sheet 2, and long glass fibers are used for the glass fibers of the reinforced resin sheet 3. The long glass fibers are arranged in the axial direction of the pile 1. Further, the reinforcing resin sheet 2 is mixed with a filler such as calcium carbonate and a thickener.

Next, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are alternately laminated in a plurality of layers and wound around a rod-shaped core material 6 formed in a rectangular cross section.
In this case, the reinforcing resin sheet 2 is wound on the outermost side, the rod-shaped core material 6 is inserted into the plastic tube 7 in advance, and both ends 7a of the plastic tube 7 are extended from the ends of the core material 6 by a predetermined length. To do. Then, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are wound around the core material 6 from above the plastic tube 7 in a roll shape.
The plastic tube 7 in this case is not particularly limited as long as it is a cylindrical tube that can be expanded to an arbitrary diameter by sealing with air pressure, vapor pressure, or the like.

  Next, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 wound in a roll shape are put into a mold 8 having a two-fold structure. Then, the vapor pressure is sealed into the plastic tube 7 from the end 7 a to expand the plastic tube 7, and the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are heated and cured by the mold 8 and the plastic tube 7. Then, the core material 6 is extracted and the plastic tube 7 is peeled off.

  The vapor pressure in the plastic tube 7 is suitably about 0.1 to 0.2 MPa, and the heating temperature is suitably about 120 ° C. Further, as the core material 6, for example, as shown in FIGS. 4A, 4B, and 4C, a brick 6a, a bamboo material 6b, or a plurality of machinable piles 1 can be used together. In this case, the cutable pile 1 does not need to be particularly extracted.

  In order to treat the reinforcing resin sheet 2 and the reinforcing resin sheet 3 wound in a roll shape at room temperature, the plastic tube 7 is expanded by enclosing air pressure from the end 7a in the plastic tube 7, and the mold 8 and the plastic tube 7, the reinforcing resin sheet 2 and the reinforcing resin sheet 3 are compressed and held for a long time, and the reinforcing resin sheets 2 and 3 are cured.

For light treatment, air pressure is sealed from the end 7a in the plastic tube 7 to expand the plastic tube 7, and a light source body such as a fluorescent lamp is placed in the plastic tube 7, and the reinforcing resin sheets 2 and 3 are placed therein. The reinforced resin sheets 2 and 3 are cured by irradiating with ultraviolet rays.
Although FIGS. 1-4 demonstrated the Example in the case of using the cuttable member which concerns on this invention as a pile, it is not limited to the utilization as a pile.
FIG. 5 shows an example in which the cuttable member according to the present invention is integrally formed into a panel shape and used as a core material of the underground continuous wall. The shield starting part is shown.

  The present invention has good machinability, is easy to handle and can be easily formed, and can be used to construct underground structures such as a shield machine start or a retaining wall retaining wall.

An example of the cuttable pile of this invention is shown, (a), (b), (c) is the top view, (d) is the perspective view, (e) is the partially expanded sectional view. An example of the manufacturing method of the machinable pile of this invention is shown, (a), (b), (c) is the perspective view. An example of the manufacturing method of the machinable pile of this invention is shown, (a), (b), (c) is the side view, (d) is sectional drawing. (a), (b), (c) is a perspective view which shows an example of the machinable pile of this invention. It is a perspective view which shows the shield start part of a shaft. It is a longitudinal cross-sectional view which shows the prior art example of the shield start part of a shaft.

Explanation of symbols

1 Cutable pile (cuttable material)
2 Reinforced resin sheet (short fiber reinforced resin layer)
3 Reinforced resin sheet (long fiber reinforced resin layer)
4 Hollow part 5 Solidifying material 6 Core material 6a Core material 6b Core material 7 Plastic tube 7a End 8 Mold

Claims (8)

A cuttable member used for constructing an underground structure, which is made of a short fiber reinforced resin layer portion impregnated with a resin in a short fiber material, and a resin material impregnated in a long fiber material arranged in one direction. A cuttable member, wherein a long fiber reinforced resin layer portion is laminated in a plurality of layers, and the short fiber reinforced resin layer portion is laminated on the outermost side and integrally formed.   A cuttable member used for constructing an underground structure, which is made of a short fiber reinforced resin layer portion impregnated with a resin in a short fiber material, and a resin material impregnated in a long fiber material arranged in one direction. A long fiber reinforced resin layer portion is laminated in a plurality of layers, and is integrally formed into a hollow cross-sectional shape.   The cuttable member according to claim 1 or 2, wherein the short fiber reinforced resin layer portions and the long fiber reinforced resin layer portions are alternately laminated.   The cutable member according to any one of claims 1 to 3, wherein the short fiber reinforced resin layer portion and the long fiber reinforced resin layer portion are integrally formed by subjecting to normal temperature treatment, heat treatment, or light treatment. . The cuttable member according to any one of claims 2 to 4 , wherein the hollow portion is filled with a filling material. The cuttable member according to any one of claims 1 to 5 , wherein the surface is formed in an uneven surface.   A method for producing a cuttable member used for constructing an underground structure, wherein a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin and a long fiber material arranged in one direction. A method for producing a cuttable member, wherein the impregnated long fiber reinforced resin layer portion is laminated in a plurality of layers, wound around a core material, and integrally formed.   A method for producing a cuttable member used for constructing an underground structure, wherein a short fiber reinforced resin layer portion in which a short fiber material is impregnated with a resin and a long fiber material arranged in one direction. A method for producing a cutable member, comprising: laminating a plurality of impregnated long fiber reinforced resin layers in a plurality of layers, winding the core around a core material, and integrally forming a hollow cross-sectional shape.

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