JP2010024783A - Protective member for structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable adjustment of size dispersion and distortion generated at manufacturing time when performing construction for covering the surface of a structure, and enable absorption of the influence of expansion or contraction of a protective member by an environmental temperature change after the construction. <P>SOLUTION: The protective member 1 made of a rubber-like elastic body is fitted to the surface of the structure to prevent the damage and abrasion of the structure, and comprises body protective portions 2 having elasticity, and attaching portions 5 for fitting the body protective portions 2 to the structure. At least one of the side surfaces 2a of the body protective portions 2 is provided with a flange portion 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protective member for a structure. More specifically, the present invention relates to a protective member mounted on the surface of the sabo dam, bridge pier, revetment wall and other various concrete structures in order to prevent damage and wear.

  Conventionally, in order to prevent a concrete structure such as a sabo dam or a bridge pier from being damaged or worn by a collision with rocks, as shown in FIG. A plate-like protective member 102 made of an elastic body is attached (see, for example, Patent Document 1). The protective member 102 is a plate-shaped elastic member provided with means for attaching to a mating member, and a reinforcing member is embedded in the elastic member as necessary. In addition, as a protective member, there is also a type in which a waste tire is pulverized together with a steel cord or nylon thread, and a small piece including a steel cord or nylon thread or the like as a reinforcing member is pressure-molded with a binder (Patent Document 2) .

JP 11-324189 A JP20004-150136

  However, when the protective members are installed and fixed so as to be arranged along the structure, if individual products have dimensional variations or distortions during manufacturing, they must be within the dimensions determined by the construction accuracy. It may not fit. For example, as shown in FIGS. 10 and 11, a situation may occur in which a gap S is generated between the protective member 102 and the protective member 102 or the protective member 102 itself is slightly lifted at the abutting portion. In such a case, since the protective member 102 is made thick and firm to receive the impact of a stone or the like, the adjustment becomes extremely troublesome.

  In addition, after construction, the part where the protective member 102 expands and collides with the temperature change of the environment rises (the part indicated by reference numeral 103), and the protective member 102 is easily damaged or increases the flow resistance of the river. As a result, there is a risk that the fixing between the protective member 102 and the structure 101 is weakened. On the contrary, if it shrinks due to a temperature change, there is a risk that a gap S is opened between the protective members 102 and the internal structure 101 is damaged.

  Then, an object of this invention is to provide the protective member of the structure which can adjust the dispersion | variation and distortion of the dimension at the time of manufacture at the time of construction which covers the surface of a structure. Another object of the present invention is to provide a protective member having a structure capable of absorbing the influence of expansion or contraction of the protective member due to a change in environmental temperature after construction.

  In order to achieve such an object, the invention described in claim 1 is a rubber-like elastic protective member which is attached to the surface of a structure and prevents damage and wear of the structure. And a mounting member for mounting the protective part on the structure, and a flange is provided on at least one of the side surfaces of the main body.

  Here, it is preferable to form a collar part in the surface side used as the surface after construction to a structure of a main-body protection part.

  According to the protective member for a structure according to claim 1, while covering the structure without a gap by being constructed so that the flanges or the side surfaces of the main body of another protective member adjacent to the flange are abutted against each other. However, since a gap (space) is formed between the side surfaces of the adjacent protective member bodies due to the interposition of the flanges, even if there are variations in individual products, there are also variations during construction. However, this can be absorbed by deformation of the buttocks. Therefore, the protective member can be spread and covered on the surface of the structure without a gap. Therefore, the protective member itself is hard to break, and is suitable as a protective wall or protective film for preventing damage and wear of various concrete structures such as sabo dams, piers and revetments.

  Moreover, since the adjacent protective members are connected to each other through the flange portion, the protective member according to the present invention can prevent a large bulge by absorbing the expansion even when the main body portion expands. . Moreover, when there is a risk of contraction, it is possible to prevent a gap from occurring by arranging the protective members while compressing the collar portion in advance during construction.

  Further, according to the structure protection member of claim 2, since there are no gaps or grooves on the surface formed by the protection member that covers and covers the surface of the structure, the flow resistance of the river is not increased. No clogging with gravel or mud.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

  1 to 5 show an embodiment of the protective member of the present invention. The protection member 1 includes a protection main body 2 having elasticity and an attachment member 5 for mounting the protection main body 2 to a structure. The protective main body 2 is obtained by pressure-molding a plurality of pieces of vulcanized rubber by adding a binder, and a nut 4 for incorporating the reinforcing member 3 and the attachment member 5 is embedded when molding. In the case of this embodiment, the reinforcing member 3 is composed of a bar frame arranged vertically and horizontally, and a nut 4 for mounting the mounting member 5 protruding from the lower surface of the protective main body 2 is fixed by welding or the like. Yes. The attachment member 5 is, for example, a metal bolt, and a part of the attachment member 5 is screwed into a nut 4 in the protection main body 2 and embedded therein, and is provided so as to protrude from the protection main body 2. In the case of this embodiment, the attachment member 5 is structured to be detachable from the protective main body 2 so that assembly at the construction site is possible, and the attachment member 5 having a length as required is appropriately attached. can do. Moreover, the protrusion (attachment member 5) from the protection main-body part 2 is lost at the time of conveyance, and it can be stacked so that the protection member 1 may not become bulky, and it can be made easy to carry. However, the attachment member 5 is not particularly limited to such a structure. For example, the attachment member 5 itself may be formed into a U shape (gate shape) and embedded to be integrated with the protective main body 2. good.

  As crushed pieces of vulcanized rubber, for example, use of crushed pieces obtained by pulverizing waste tires such as automobiles is preferable from the viewpoint of enabling reuse of industrial waste. Then, the vulcanized rubber fragments are connected with a binder in such a way that minute gaps remain between the fragments (for example, the proportion of the gap in the protective main body 2 is 5% to 30%), and compression molding is performed. To integrate. Thereby, high cushioning properties can be provided, and the protective effect of the structure can be further enhanced. Of course, a newly created vulcanized rubber piece can also be used as the material of the protective body member. However, when a waste tire is used, it is preferable in terms of resource reuse and cost reduction because the collected waste tire can be crushed to obtain fragments as a material. Incidentally, the binder is used as an adhesive means for joining the pieces, and if the pieces can be firmly bonded to each other and the protective main body 2 after molding can be released from the mold, the binder is used. The type is not particularly limited. As such a binder, use of a urethane resin or the like is preferable, for example.

  In addition, rubber materials other than waste tires may be used, such as natural rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, ethylene propylene rubber, urethane rubber, silicone rubber, fluorine rubber, etc. In addition, a blend of these rubber materials can also be used. The size of the fragments is not particularly limited, but if a specific example is given, it is preferable to use a material having a size of about 10 mm square as a main constituent fragment, and preferably about 20 mm square at most.

  Here, when obtaining a crushed piece from a waste tire, it is preferable to use a crushed rubber layer alone. In particular, it is not preferable to use the steel cord remaining in the tire because it is dangerous when the remaining steel cord is exposed on the surface of the protective member. Of course, it is also possible to use fragments obtained by pulverizing the carcass portion and the rubber layer without separating them. In this case, since the nylon yarn or the like remaining in the crushed pieces 2a functions as a reinforcing member, the strength of the crushed pieces themselves can be reinforced to increase the strength of the protective main body.

  The reinforcing member 3 is a member that is embedded in the protective main body 2 and reinforces the protective main body 2. As the reinforcing member 3, reinforcing reinforcing bars are arranged vertically and horizontally, and are embedded therein. Steel bars for reinforced concrete were used. The vertical bars and the horizontal bars were connected to each other by welding at the intersections. Moreover, it is preferable to weld the nut 4 to the location where the vertical bar and the horizontal bar of the reinforcing member 3 intersect. The nut 4 is embedded at six locations at equal intervals, and has a length that reaches the bottom surface of the protective main body 2. A screw portion at the head of the attachment member 5 is screwed into the nut 4 so that the attachment member 5 protrudes from the bottom surface of the protection main body portion 2.

  On at least one surface of the side surface 2 a of the protection main body portion 2, a flange portion 6 is provided. The flange portion 6 is sufficient to exhibit a buffering function between the adjacent protective members 1 as long as it is provided on at least one side surface 2a, but preferably provided in all the four side surfaces 2a. In other words, it is provided around the entire circumference of the protection main body 2. In this case, there is an advantage that the adjustment amount is insufficient or the adjustment direction is not limited.

  It is preferable that the protrusion amount from the side surface 2a of the protection main body portion 2 of the flange portion 6 is 2 to 10 mm. If it is less than 2 mm, the effect of the collar part 6 is small, and if it exceeds 10 mm, the strength of the collar part 6 becomes weak and cannot withstand an impact or the like. Moreover, it is preferable that the thickness of the collar part 6 is 10-30 mm. If it is less than 10 mm, the strength of the collar portion 6 becomes weak and cannot withstand impacts and the like, and if it exceeds 30 mm, the rigidity becomes high and the cushioning effect of the collar portion 6 becomes small.

  Furthermore, as shown in FIG. 2, it is preferable that the height direction position of the protection body part 2 of the collar part 6 is formed on the surface side that becomes the surface after construction on the structure. In this case, when the protective member 1 is spread and covered on the surface of the structure, there are no gaps or grooves due to the presence of the flange portion 6 on the surface formed by the main body protective portion 2, so that the flow resistance of the river It does not increase the pressure and does not clog gravel or mud.

  Here, the formation position in the height (thickness) direction of the protection main body portion 2 of the collar portion 6 is not limited to the above-mentioned case, and as shown in FIG. It may be formed or may be in the middle of the protective body 2 in the height direction depending on circumstances. Further, as shown in FIG. 7, the number of the collar portions 6 is not limited to one in the height direction, but may be a plurality. In this case, the gaps (buffer spaces) 7 between the adjacent protective members 1 are multiple-sealed by the plurality of flanges 6, and the protective effect is enhanced. Furthermore, it is not necessary to form the flange portion 6 at the same height on the entire circumference. For example, as shown in FIG. 8, the flange portion has two opposite surfaces (for example, a front end surface and a rear end surface or a right end surface and a left end surface). By making the heights of 6 different, a double seal structure can be formed with the flange portion 6 of the protection main body portion 2 of another adjacent protection member 1.

  In addition, although the protective member 1 of this embodiment may be constructed | assembled with respect to the completed structure, a protective member is used as a formwork material at the time of constructing a structure. That is, for example, when constructing a sabo dam, the protection main body 2 is first framed so as to form an outer wall of the dam, and then concrete is placed into this frame. When the concrete is solidified, the protective main body 2 having the mounting portion 5 protruding into the concrete is fixed to the surface of the concrete. As a result, the protective body 2 is attached to the surface of the structure (in this example, a sabo dam), and the protective film or protection prevents the structure from being damaged or worn by collision with rocks or the like. Acts as a wall.

  In order to confirm the effect of the heel part 6, the following test was conducted. Here, the size of the protective member 1 is an appropriate size as a member to be mounted on the surface of the structure, and is a square having a side of 1000 mm and a thickness of 200 mm. Cured with a binder of urethane resin. As shown in FIG. 1, the flange portion 6 is formed on the entire circumference and has a protrusion amount of 2.8 mm and a thickness of 20 mm. Further, reinforcing reinforcing bars 3 are embedded in the protective main body 2.

(1) First, in order to observe the dimensional change due to heat of the protective member, the dimension after the protective member 1 was left at a constant temperature for 24 hours was measured. Table 1 shows the results of the shrinkage test.

  Based on this result, the average shrinkage at 0 ° C is 3.2 mm. Therefore, when there are ridges on the entire circumference or on two opposite sides, the protrusion amount (height of at least 1.6 mm or more on one side at room temperature) ) Is necessary, and it has been found that shrinkage can be accommodated if there is a projection of 2 mm on one side. In most cases, it is sufficient that the collar portion exists on at least one side. In this case, it is sufficient that the protruding amount is at least 3.2 mm or more, preferably 4 mm or more at room temperature. In addition, the protrusion amount of this collar part is per 1000 mm in length, and when the dimension of the protective member is larger than 1000 mm or conversely small, the appropriate protrusion amount of the collar part should be increased or decreased accordingly. Needless to say.

尚、表中、成形×は成形上の判定で、材料が十分に充填できずに欠けの発生率が高いことを示す。また、作業性×は、作業性の判定で、圧縮して構造物の上に設置することが困難であることを示す。強度×は、強度判定で、直径10mmの丸棒を先端に取り付けた荷重50kgfの錘を、２枚の保護部材を並べて鍔部を接触させた処に載せて、鍔部の変形状態を観察した結果であり、〇はほとんど変形せず、△は錘が鍔部を貫通しない程度に変形したことを示す。×は錘が鍔部を貫通したことを示す。 (2) Next, the amount of protrusion and the thickness of the flange portion 6 were variously changed, and the deformation state of the flange portion 6 was tested. About the dimension except the collar part 6 of the protection main-body part 2, the same thing as the test 1 was used, and 8 samples which changed various dimensions about the protrusion amount and thickness of the collar part 6 were used. Table 2 shows the test results.

In the table, molding x is a judgment on molding, and indicates that the material is not sufficiently filled and the occurrence rate of chipping is high. In addition, workability x indicates that it is difficult to compress and install on a structure in the determination of workability. For strength x, in strength judgment, a weight of 50 kgf with a round bar with a diameter of 10 mm attached to the tip was placed on the place where two protective members were placed side by side and the buttock contacted, and the deformed state of the buttock was observed. It is a result, (circle) shows that it hardly deform | transformed, and (triangle | delta) shows that the weight deform | transformed to the extent which does not penetrate a buttocks. X indicates that the weight has penetrated the buttocks.

  From this result, it has been found that the protruding portion preferably has a protrusion amount of 2 to 10 mm and a thickness of 10 to 30 mm.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, an example of a substantially rectangular parallelepiped is illustrated as the protection main body 2 (see FIGS. 1 to 5). The shape can be changed as appropriate. Moreover, although the crushed rubber fragments are used for the protective main body 2, the entire protective main body may be manufactured by vulcanization molding.

It is a top view which shows one Embodiment of the protection member of the structure concerning this invention. It is a front view of the protection member. It is a side view of the protection member. It is a top view which shows one Embodiment when arranging the protection member of this invention. It is the same front view. It is front sectional drawing which shows other embodiment of the collar part of a protection member. It is front sectional drawing which shows other embodiment of the collar part of a protection member. It is front sectional drawing which shows other embodiment of the collar part of a protection member. It is a figure which shows an example of the sabo dam with which the protection main body member was mounted | worn on the surface. It is a top view which shows the state in which the conventional protective member was installed in the surface of the structure. It is sectional drawing which shows the state in which the said protection member was installed in the surface of the structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protection member 2 Protection main-body part 2a Side surface of a protection main-body part 3 Reinforcement member 4 Nut which comprises an attachment member 5 Bolt which comprises an attachment member 6 Gutter part 7 It is formed between adjacent protection main-body parts by interposition of a gutter part Gap

Claims (2)

In a protective member that is attached to the surface of the structure to prevent damage or wear of the structure, a main body protection portion made of a rubber-like elastic body, and an attachment member for attaching the main body protection portion to the structure And at least one of the side surfaces of the main body protection portion is provided with a flange portion. The structural protection member according to claim 1, wherein the flange portion is formed on a surface side that becomes a surface after the main body protection portion is applied to the structure.

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