JP4451826B2 - Steel frame structure - Google Patents

Description

  The present invention relates to a steel frame structure used as a structure such as a retaining wall, a revetment, and a dam.

  Conventionally, (1) a steel frame made of a net-like member (for example, expanded metal) is known in order to prevent leakage of the filling material that is packed in the steel frame (for example, Japanese Patent Laid-Open No. Hei 11). No. 209987 (see Patent Document 1).

  It is also known that (2) an expanded metal is stretched at the opening of a cubic lattice steel frame in which the horizontal frame member is fixed so as not to rotate. (For example, see Patent Document 2 of Japanese Patent Publication No. 60-9164)

  However, neither of the above-mentioned patent documents (1) and (2) describes a specific structure or method for fixing the expanded metal.

  Further, as shown in FIGS. 21 and 22, a steel frame is also known in which a large number of screen material 2 ends are pin-joined so as to be rotatable with a single bolt (see, for example, Patent Document 3).

  The steel frame 1 implemented by the present applicant has a characteristic that it can be deformed following the ground subsidence and the like, and its structure will be briefly described with reference to FIGS. 21 and 22. A construction 5 such as a dam or a retaining wall is constructed using the steel frame 1 in which the screen material 2 is rotatably connected between the front pillars 3 or between the rear pillars 4.

  The steel frame 1 connects the front and rear column members 3, 4, depth beams 6, 6b, front beams 7a and rear beams 7c, screen materials 2, braces 8 after excavating a construction site such as a dam. Assembling, if necessary, a plurality of steel frames 1 are arranged in the front-rear direction (wall thickness direction), stacked in a plurality of stages, and a plurality of frames in the lateral direction (left-right direction in FIG. 22) are arranged in series. At the time of construction, the pillars 3 and 4 at the boundary between adjacent steel frames 1 are shared, and a stone or the like that does not pass through the gap (about 15 cm) between the screen materials 2 inside the structure framework 9 A filling screen 10 is filled, a lid screen material (not shown) is attached to the upper surface of the uppermost steel frame 1, and a structure 5 such as a dam is constructed. The screen material 2 is provided on the outermost peripheral side surface of the structure framework 9, and the bottom screen material (not shown) is provided on the bottom surface of the lowermost steel free frame 1.

  In the steel frame 1, the screen material 2, the front beam 7a, and the rear beam 7c are connected to the column 3 (4) so as to be rotatable. Since the steel frame 1 has the property of being freely deformable, the front and rear columns of such a steel frame 1 are used as columns shared by the front and rear columns of the adjacent steel frame 1, and the steel frame 1 is formed in the left-right direction. When connected, it becomes a structure such as a dam or earth retaining wall that maintains the above-mentioned characteristics, and a structure that can follow the uneven settlement of the ground can be constructed.

So far, the stone used to fill the inside has been of a size that will not slip out between the screen materials, but depending on the construction site, there may be sites where it is difficult to align these sizes of stone. It is coming. For this reason, it is desirable to use on-site generated gravel or crushed stone.
JP-A-11-209987 Japanese Patent Publication No. 60-9164 Japanese Patent No. 2870683

  In order to construct the structure more economically while maintaining the steel frame 1 as the basic unit constituting the structure having the characteristics as described above, when the on-site generated gravel or crushed stone is used, the screen Since it is smaller than the gap between the materials, as shown in FIG. 23, a mesh-like body 34 is provided to block between the screen materials 2, and the screen-like material 2 and the mesh-like body 34 are attached to the screen material 2 and the mesh-like body 34 by using the number wires 70. It was thought.

  As described above, when the mesh body is fixed to the plurality of screen materials 2 by the numbered wires 70, the mesh body 34, the plurality of screen materials 2, and the steel frame 1 are close to an integrated structure. Since 2 becomes difficult to rotate, there is a possibility that the characteristics of the rotation performance of the steel frame 1 may be hindered, and a structure that does not hinder the rotation performance of the steel frame has been desired.

  An object of the present invention is to provide a steel frame structure in which the net-like body 34 such as an expanded metal provided in the steel frame does not hinder the rotation performance of the steel frame.

In order to solve the above-mentioned problem advantageously, in the steel frame structure of the first invention, a large number of pillars arranged at intervals in the front-rear direction and at intervals in the left-right direction, and the front side or the rear side The front and rear beam members connected to the column members adjacent to each other in the left and right direction by bolt joints, and the depth members in the front and rear directions fixed to the front and rear column members, A grid-like steel frame is continuous in the left-right direction, and a large number of screen materials are attached to a surface located outside the cubic grid-like steel frame at intervals, inside the beam material or the screen material. In the steel frame structure in which the mesh body is arranged inside the cubic lattice steel frame so as to be supported and filled with filling material inside, and the steel frame fluctuates following the fluctuation of the ground,
In one section surrounded by two column members adjacent to each other on the front and upper and lower front beam members, the one section is divided into a plurality of parts, and a divided net is arranged in each divided part, and the divided The net is characterized in that only one portion of the intermediate part is connected to the screen material.

 According to a second invention, in the steel frame structure according to the first invention, the one section is divided into left and right or up and down, and at least two or more divided nets are arranged.

Further, in the third invention, in the steel frame structure of the first invention or the second invention, the one section is divided into left and right parts and divided into upper and lower parts, and four divided nets are arranged. Features.
According to a fourth aspect of the present invention, in the steel frame structure according to any one of the first to third aspects of the invention, the divided net is an expanded metal.

  According to the first invention, the one section is divided into a plurality of sections in one section surrounded by two adjacent column members on the front surface and the upper and lower front beam members inside the steel frame in a cubic lattice shape. Since the divided nets are arranged in the divided parts and one intermediate portion of the divided net is attached to the screen material, the attachment is very easy. In addition, since the peripheral edge of the divided mesh body is not fixed, even if the front column or the rear column sinks due to ground subsidence or the like, the rotation of the front beam member, the rear beam member, or the screen member is inhibited. Therefore, if the front beam member, rear beam member, or screen member is rotated slightly and the inside of the cubic lattice-shaped steel frame is deformed into a rhombus, etc., the divided net is attached at one place in the middle. Therefore, there is a degree of freedom such as rotational deformation, and since the periphery of the divided mesh body is not fixed, it is possible to follow the deformation inside the cubic lattice steel frame, and the divided mesh body Is not damaged, and there is no possibility that the filling material such as gravels or crushed stones leaks from the steel frame structure.

  According to the second invention, since one section is divided into left and right or up and down and a divided net body divided into at least two or more is used, it is lighter and smaller than the case of one large net body. Therefore, the workability of the worker is improved, and the degree of freedom of rotational deformation of each divided mesh body is higher than in the case of a single large mesh body, and one place in the middle part of the divided mesh body Is connected to the screen material, and the peripheral edge of the divided mesh body is not fixed, so that it can easily follow the deformation of one section of the cubic grid steel frame, and each divided mesh body is damaged. Therefore, there is no possibility that the filling material such as gravels or crushed stones leaks from the steel frame structure.

  According to the third invention, one section is divided into left and right or up and down, and is constituted by four divided nets of upper, lower, left and right, so that the workability of the worker is further improved and one large net is obtained. In this case, the degree of freedom of rotational deformation of each divided mesh body is increased, and only one intermediate portion of the divided mesh body is connected to the screen material. Since it is smaller than the case of a single large mesh body and the peripheral edge of the divided mesh body is not fixed, it can easily follow the deformation of one section of a cubic lattice steel frame, Can be reliably prevented.

  According to the fourth invention, since expanded metal is used for the divided mesh body, an inexpensive and appropriate mesh-shaped divided mesh body can be formed, and leakage of gravels or crushed stones generated from the field between the screen materials. Can also be prevented. Moreover, since it is an expanded metal, it can be easily divided into a plurality of appropriate sizes and arranged inside the cubic steel frame structure, and the mounting location is one in the middle portion. There is no fear of hindering the rotation performance of the screen material in the frame structure, and the characteristics of the steel frame structure are not inhibited.

Next, the present invention will be described in detail based on the illustrated embodiment.
FIG. 9 and FIG. 10 show a first embodiment of the net-holding metal fitting 14 used in the present invention. The net-holding metal fitting 14 includes an arm 11 with a locking portion, a cotter support member 12, The arm 11 with a locking portion is formed of a wedge-shaped cotter 13 and a female screw fitting 16, and the locking portion 15 is engaged with the lower surface of the screen material 2 at the lower end of the steel rod-like member by bending the steel rod member. And a vertical portion 17 in contact with the front surface (outer surface) of the screen material 2 and an arm portion 18 having a tip portion mounted on the upper surface of the screen material 2 are integrally bent and formed on the same surface. Yes.

  A locking groove 19 is formed on the inner side of the locking portion 15, the vertical portion 17, and the tip of the arm portion 18.

  The arm 11 with the locking portion is formed with a male screw portion 20 over a predetermined length from the base end portion to the intermediate portion of the arm portion 18, and the arm portion 18 has an arm insertion hole 21 at the center portion. The cotter support member 12 is attached to the arm portion 18 by being inserted into the cylindrical portion 22 of the cotter support member 12 having the provided cylindrical portion 22. The cotter support member 12 is provided with cotter support portions 23 so as to project on both sides of the tubular portion 22, and a cotter detachment preventing portion 24 on the outer side of the support portion 23 is parallel to the arm portion 18. It is provided so as to protrude toward the part.

  In the illustrated embodiment, the cotter support member 12 is a steel plate in which a semicircular recess is formed at the center of a planar U-shaped steel plate, and the steel plates are brought into contact with each other so that the recesses face each other inward. It is fixed and formed by welding such as spot welding.

  A female screw fitting 16 screwed into a male threaded portion 20 of the arm portion 18 is brought into contact with the base side end face of the cotter supporting member 12, and the cotter supporting member 12 is supported by the female screw fitting 16.

  The female screw fitting 16 is installed at a preset position, and is fixed by welding or the like as necessary to hold the position. Thereby, the cotter support member 12 is held at a predetermined position on the base side of the arm portion 18.

  As shown in FIG. 11, the cotter 13 is a wedge having a U-shaped cross section, and includes a pair of parallel leg portions 25 and a U-shaped connection portion 26 that connects the leg portions 25 to each other. Each leg 25 has a mesh body pressing part 27 arranged at right angles to the arm part 18 on the front side of each leg 25, and on the rear side of the leg part, on the base part side of the arm part 18 from the tip part toward the connection part 26. The wedge-shaped leg portion 25 is provided with an inclined surface 28 inclined so as to approach.

  When the cotter 13 is attached to the arm portion 18 by the U-shaped connecting portion 26, the cotter 13 may fall from the arm portion 18 and come off when the leg portion 25 of the cotter 13 is engaged with the arm portion 18. There is no.

  Further, if the female screw fitting 16 is fixed in advance to a predetermined position of the arm portion 18, it is not necessary to adjust the position of the female screw fitting 16 in the longitudinal direction of the arm portion 18 in field work. Since it is only necessary to lock the arm portion 18 and push the cotter 13 in, the field work becomes easy and the workability can be improved.

  Further, the position of the cotter support member 12 can be adjusted with respect to the arm portion 18 by simply adjusting the position of the female screw fitting 16 with respect to the arm. The position of the cotter support member 12 can be easily adjusted by appropriately adjusting the position of the cotter support member 12 at a place where the slope of the slope changes or at the time of repair.

FIG. 12 and FIG. 13 show another form of the mesh body holding metal fitting 14 used in the present invention, and includes an arm 11 with a locking portion, a cotter support member 12 and a wedge-shaped cotter 13. In this form, the cotter support member 12 is directly fixed to the arm portion 18 by welding, and the female screw fitting 16 is omitted. The base end portion of the arm portion 18 is crushed and deformed to form a flat portion, and the flat U-shaped steel plate cotter support member 12 is superposed on the flat portion 29 and fixed by a plurality of spot welding. Thus, when the cotter support member 12 is fixed directly to the arm portion 18 by welding, the male screw portion 20 and the female screw fitting 16 of the arm portion 18 can be omitted, and the net body holding fitting 14 can be manufactured at low cost. . Since the other configuration is the same as that of the above-described embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.
In such a form, the cotter support member 12 is fixed at a predetermined position in the longitudinal direction of the arm portion 18 in a factory (or on-site).

  Next, with reference to FIG. 14 to FIG. 19, the cubic lattice-shaped steel frame 1 having a basic structure constituting the steel frame structure 30 shown in FIGS. 1 to 5 in the present invention will be described.

  1 and FIG. 5 as an embodiment of the present invention, the basic structure of the cubic lattice-shaped steel frame 1 constituting the steel frame structure 30 is the same as that of the conventional frame structure. The structure will be described with reference to FIGS. 14 to 19. The rear vertical rear column 4 and the front inclined front column 3 inclined at a normal angle use H-shaped steel, both of which have flanges 40, 40. Arrange so that is facing the front-rear direction.

  Then, the horizontal depth beams 6 and 6b extending in the front-rear direction are connected between the upper end and the lower end of the rear rear column 4 and the front front column 3, and the brace 8 is bridged obliquely to form a trapezoidal frame. 30 is formed. The two trapezoidal frames 30 are vertically arranged with left and right intervals, and the rear beam 7c is connected between the upper and lower ends of the vertical rear rear column 4 so as to be rotatable in the vertical direction. Further, the front beam 7a is connected between the upper ends and the lower ends of the inclined front side pillars 3 so as to be rotatable in the vertical direction to form a cubic lattice-shaped steel frame 1 composed of a hexahedral solid frame 32. . (In the illustrated form, the lowermost cubic lattice-shaped steel frame 1 in FIG. 1 is shown.)

  Further, a plurality of screen members 2 parallel to the rear beam 7c and spaced in the height direction are connected between the rear left and right rear pillars 4 and 4, respectively, so as to be rotatable in the vertical direction, and on the front side. A plurality of screen members 2 parallel to the front beam 7a7 and spaced in the height direction are connected between the left and right front pillars 3 and 3 so as to be rotatable in the vertical direction.

  In this embodiment, the depth beams 6 and 6b, the front beam 7a and the rear beam 7c, the screen material 2 and the brace 8 are all made of steel such as channel steel. In addition, when this steel frame 1 is what is arrange | positioned at the lowest stage of structure frames (refer FIG. 1, FIG. 5) 9, such as a dam, several lower frames, for example, between front and back beams 7a and 7c, a plurality of frames. The bottom screen material (not shown) is connected at an interval at which the filling material 10 such as stone does not pass. When the structure frame 9 is arranged at the uppermost stage, after filling the structure frame 9 with a filling material 10 such as a stone, a plurality of lids are provided between the upper and lower beams 7a and 7c, for example. Screen materials (not shown) are connected at intervals. Note that the cubic lattice-shaped steel frame 1 shown in FIG. 14 does not necessarily indicate the same concrete one of the steel free frames shown in FIG. 1 or FIG.

  The details of the connecting portion of each member will be described. The front inclined front column 3 and the lower front beam 7a and depth beam 6 are connected as shown in FIGS. 15 (a) and 15 (b). That is, a hole 38 is formed in the flange 37 at the end of the groove-shaped front beam 7a, and a mounting plate 39 with a hole 36 is welded and fixed to the web portion 35 of the front column 3 so as to form a vertical surface. A gusset plate 41 composed of a plate material 41a applied to the flange 40 of the front column 3 and a plate material 41b butt-welded to the flange 40 of the front column 3 is welded and fixed to the bottom of the end of the depth beam 6 having a cross section. 40 and the gusset plate 41 are connected by a bolt 42 and a nut 43, and the flange 37 on one side of the front beam 7a is connected to the flange 40 of the front column 3 by a bolt 42 and a nut 43 with a taper washer 44 interposed therebetween. The flange 37 on the other side of the beam 7 a is connected to the mounting plate 39 by a bolt 42 and a nut 43. Since the taper washer 44 forms a vertical surface when brought into contact with the flange 40 of the front column 3, the front beam 7a in contact therewith is rotatable in the vertical direction. In this embodiment, the gusset plate 41 is coupled together with the front column 3 and the front beam 7a by the bolt 42. As shown in detail in FIGS. 19A and 19B, the taper washer 44 has a notch 53 opened in a direction perpendicular to the taper direction, and the angle of the taper is inclined to the front part. The angle is such that a vertical plane is formed when contacting the flange 40 of the column 3.

  The details of the connecting portion between the front column 3 on the front side and the screen material 2 on the front side will be described. As shown in FIGS. 17 (a) and 17 (b), a hole 40c is formed in the flange 40 of the front column 3, A hole 2 a is formed in the end portion of the screen material 2, and a taper washer 55 having the same taper angle as that of the taper washer 44 and having a lateral cutout 54 is interposed, and is connected by a bolt 42 and a nut 43. Since the taper washer 55 forms a vertical surface when brought into contact with the flange 40 of the front column 3, the screen material 2 in contact with the taper washer can be rotated in the vertical direction.

  FIG. 18 shows details of the vicinity of the connecting portion between the upper end of the front pillar 3 on the front side and the front beam 7a. The upper front beam 7a is connected to the front flange 40 of the front column 3 by the bolt 42 and the nut 43 with the same structure as described above, that is, with the taper washer 44 with the notch 53 interposed therebetween, and the front beam 7a. A bolt 42 and a nut 43 are connected to a mounting plate 39 fixed to the column 3 by welding. In addition, about the upper and lower boundary part of the stacked steel frames 1, the front beam and the rear beam of any one of the steel frames 1 can be omitted as illustrated. Further, the brace 8 has a gusset plate 51 welded and fixed to the depth beam 6 (or 6b) fixed to the front column 3 with bolts 42 and nuts 43 and connected to the gusset plate 51 with bolts 61 and nuts.

  The details of the connecting portion between the rear vertical column 4 and the lower rear beam 7c or depth beam 6 will be described. As shown in FIG. The gusset plate 51 welded and fixed to 6b and the flange 7b on one side of the rear beam 7c are brought into contact with each other by bolts 42 and nuts 43. The flange 7b on the opposite side of the rear beam 7c is simply the flange 40 of the column member 4. Are connected by bolts 42 and nuts 43. Since the vertical pillar member 4 has a vertical surface with the flange 40, the rear beam 7c can be rotated in the vertical direction without difficulty by simply connecting with a bolt and a nut. Further, the rear rear column 4 and the screen material 2 are simply connected by bolts 42 and nuts 43 as shown in FIG. Thereby, the screen material 2 can be rotated in the vertical direction without difficulty. In addition, what is necessary is just to make it interpose a taper washer like the front pillar 3 side, when the rear rear pillar 4 inclines.

  When assembling the cubic lattice-shaped steel frame 1, when connecting the depth beams 6 and 6 b, the front beam 7 a and the rear beam 7 c, and the screen material 2 to the column members 3 and 4, at least the left and right column members 3 ( Or 4) and the front beam 7a and rear beam 7c whose ends are arranged on the inner surface of the flange 40 of the column member 3 (or 4) or the screen member 2 are connected by bolts 42 or the like by temporary tightening. A cubic lattice-shaped steel frame 1 composed of a hexahedral solid frame 32 provided with the material 2 is temporarily assembled. Actually, the column members 3 and 4 and the depth beams 6 and 6b, the front beam 7a and the rear beam 7c, and the screen material 2 at the time of temporary assembly are all temporarily tightened. Thereafter, among the temporarily tightened bolts, the bolt connecting the front beam 7a or the screen material 2 to the front front column 3 is a gap between the inner surface of the flange 40 of the front column 3 and the front beam 7a or the screen material 2. The notch 53 of the taper washer 44 is fitted into the part. Thereafter, final tightening is performed on all the above-described temporary tightening bolts. Thereby, the steel free frame with a slope is assembled. In the actual construction framework construction, each steel free frame 1 is not individually assembled independently, but the adjacent steel frames 1 are arranged in the form of a horizontal beam or a depth beam in a form in which the column members 3 or 4 are shared. Are connected, and a steel frame (steel free frame) 1 is successively arranged.

  As described above, in the assembling work of the steel frame 1, when connecting the front inclined column 3 on the front side and the front beam 7 a or the screen material 2 at the time of temporary assembly, a small part with a round hole is provided. Since there is no need to interpose a taper washer, it is extremely easy to connect the members. Further, since the front beam 7a or the screen material 2 connected to the inclined front column 3 is attached in contact with the tapered washer 44 or 55 having a vertical surface, it can be rotated in the vertical direction. Therefore, when the steel frame 1 is laterally inclined due to the fluctuation of the ground after the installation of the steel frame 1 or when the steel frame 1 is installed on the inclined ground, the inclination follows the inclination. Thus, since the front beam 7a can be easily deformed into a row quadrilateral, a stable structure is obtained in which a torsional force acts on the member and is not damaged.

  Further, since the directions of the notches 53 and 54 of the taper washers 44 and 55 are orthogonal to the taper direction, the taper washers 44 and 55 are inserted from the side into a narrow space between the flanges of the front pillar 3 having an H-shaped cross section. can do. Therefore, the work of attaching the taper washers 44 and 55 is easier in terms of work space compared to the case where the taper washers 44 and 55 are fitted to the bolt from above or below. Further, if the notch is oriented in the same direction as the taper direction, the taper washer is arranged so that the notch of the taper washer faces upward (that is, the flange 40 on the outside of the front column 3 (left side in FIG. 18)). In this case, the taper washer easily falls, so the workability is poor. However, if the notches 53 and 54 are provided perpendicular to the taper direction as described above, such inconvenience does not occur.

  The column material in the present invention may have an H-shaped cross section by welding. In short, any material may be used as long as it has an H-shaped cross section with a flange capable of bolting a cross beam or a screen material. Further, in the embodiment, the front column 3, the front beam 7a, and the depth beam 6 to which the gusset plate 41 and the like are fixed are connected together, but the depth beam 6 is separated from the front beam 7a (or the rear beam 7c). It can also be connected to the front column 3. When the steel free frame 1 has both slopes, that is, when the rear rear column 4 is also inclined, the front beam (or rear beam) or the screen material is naturally connected to the rear column. Therefore, the present invention can be applied.

  After assembling the cubic lattice-shaped steel frame 1 constructed as described above in common with the columns 3 (4) adjacent to each other to construct the lowermost steel frame 33a, the two adjacent frames 2 on the front surface are assembled. Expanded metal or the like (preferably from the inside of the steel frame 33a in a section surrounded by the front pillar 3 (or two rear pillars 4 adjacent to each other on the rear face) and the upper and lower front beams 7a. A plurality of divided nets constituting the expanded metal) 34 are arranged so as to contact the screen material 2 (see FIGS. 2 and 3). The illustrated mesh body 34 is a split-type mesh body 34. A pair of split-type mesh bodies 34 on the left and right sides are arranged on a surface in a cubic lattice-shaped steel frame 1a. The upper end of the direction is disposed in the groove of the front beam 7a (or the rear beam 7c), and the lower end of the expanded metal 34b at the lowermost stage has a support plate 71 fixed to the column 3 (4) as shown in FIG. It is supported so as not to move in the wall thickness direction. The lower end portion of the expanded metal 34b in the steel frame 1 placed on the middle stage or the upper stage is placed on or close to the upper surface of the front beam 7a (or the rear beam 7c), and the front beam 7a (or the rear beam 7c). ) And is supported by the upper beam or the screen material 2 (in the case of FIG. 1). Alternatively, after assembling the entire steel frame including the lowermost steel frame 33a and the intermediate and upper stages, the split type net 34 may be stretched in the steel frame.

  The mesh body 34 corresponds to the size of one section on the front or rear surface side in the steel frame structure assembled with the front and rear columns 3 (4) in the cubic lattice-shaped steel frame 1 in common, or Depending on the size of one section such as the side surface of the end portion, a split type net 34a divided in the left-right direction is used, and the center side ends in the left and right direction of adjacent split type net 34a are partially overlapped. Can be arranged.

  As described above, when the split type mesh body 34a is used, the workability is good and the expanded metal 34b is fixed at only one place, so that the workability is good and the expanded metal is also divided in the left-right direction. Therefore, the construction and handling of the expanded metal 34b are easy, and the risk of hindering the rotation of the screen material or the like in the steel frame structure 30 can be reduced. On the other hand, when the expanded metal 34b has a large planar shape, and a single expanded metal 34b is stretched over the entire front or rear surface of one cubic lattice and fixed at a number of locations, the expanded metal 34b is planar. Since it becomes a structure, there is a possibility that the rotation of the screen material may be hindered, and a plurality of workers are required for carrying and handling the expanded metal 34b, which may reduce workability.

  As for the number of divisions per section inside the front or rear surface of the cubic lattice-shaped steel frame 1, as shown in the figure, one section is blocked by two pieces of divided type nets 34a having a short width in the left-right direction. It may be configured such that four divided network bodies are used in the left and right direction and the up and down direction so as to block one section, and each divided type is formed by a four divided network body. The net body can behave independently, there is little deformation, and workability is further improved.

  The split type mesh body 34a such as the expanded metal 34b is disposed so as to contact the inner surface of the screen material 2 from the inside of the cubic lattice-shaped steel frame 1, and the grooved locking groove in the mesh body holding metal 14 is provided. The tip portion (locking portion 15) on the 19 side is inserted into the mesh 50 of the net body 34 such as the expanded metal 34b, and the screen material is inserted into the locking groove 19 so as to cover the tip portion from above the screen material 2. In a state where 2 is locked, the cotter support member 12 is attached to the arm portion 18 at a predetermined position, and then a wedge-shaped cotter 13 is press-fitted between the mesh body 34 and the cotter support member 12. The press-fitting of the cotter 13 is sufficient to hold the expanded metal 34b and does not need to be firmly fixed. Also, the screen material 2 and the expanded metal 34b are integrated into the screen material 2 or the front beam 7a (or the rear beam 7c) by being firmly pressed and fixed so that the plate-like portion of the expanded metal 34b is crushed and deformed. However, this is not preferable in allowing relative deformation at these boundary surfaces. In addition, since the cotter 13 according to the embodiment includes a pair of leg portions 25, the cotter 13 is pressed at two locations on the front surface of each leg portion 25 even at one location, so that two-side pressing is performed. It is preferable that the pressing part of the divided type net body 34 is near the upper and lower and right and left central parts.

  Further, in the case where the overlapping portion 52 adjacent in the left-right direction in the split-type expanded metal 34b is held by the mesh-holding metal fitting 16, the mesh-holding as shown in FIG. 6 (b) or FIG. 7 (b). What is necessary is just to insert and arrange | position the front-end | tip part in the metal fitting 14. FIG.

  In the lowermost continuous steel frame 33a as described above, the filling material 10 made of crushed stone (diameter 40 mm to 100 mm) or on-site generated gravel is packed, and the lowermost continuous steel frame is similarly applied. On the body 33a, a middle or upper continuous steel frame body 33b is constructed, a plate-like net 34 is provided, and crushed stones or on-site gravels are filled, and a dam or retaining wall (backfill if necessary) A construction 5b such as a soil filling) is constructed. As described above, if crushed stone (diameter 40 mm to 100 mm) or on-site generated gravel that can be easily arranged can be used, construction becomes easy.

  When implementing the present invention, as shown in FIG. 20 (a), the net body holding metal piece 14 shown in FIG. 20 (a) is arranged with the arm portion 18 reversed. May be arranged from the lower side of the screen material 2 through the mesh 50 of the split-type net 34a, and the engaging portion 15 of the net body holding metal 14 may be engaged with the upper surface of the screen material 2.

  Furthermore, as a modification of the mesh body holding metal fitting 14, as shown in FIG. 20 (b), an arm 11 with a locking portion is provided with an inverted L-shaped vertical portion 17 having a locking portion 15, a long nut 45, The bolt 47 can also be used. In the illustrated embodiment, the longitudinal portion 17 is arranged at a right angle so as to intersect one end side in the axial direction of the long nut 45 having a long female screw hole at the base end portion of the vertical portion 17, and the end portion of the vertical portion 17 is welded to the long nut. 45 is fixed to the outer surface on one end side in the axial direction by welding, and the male screw portion 20 of the long bolt 47 having a relatively long axial length is screwed into and connected to the female screw hole on the other end side of the long nut 45. The long nut 45 may be fixed by welding, and the bolt head 47a of the long bolt 47 may be replaced with the arm 11 with a locking portion that is engaged with the cotter support member 12. When the embodiment is implemented as in the above embodiment and the projection of the shaft portion of the arm member 18 is large in the steel frame, the bolt head 47a is supported on the cotter support member 12 as described above. Since the arm material 11 with the stop portion is well stored and does not protrude into the steel frame body, when the crushed stone is put into the steel frame body, the crushed stone hits the protruding portion of the arm material 18 to eliminate the arm material from shifting. Can do. In the above case, the arm portion 18 is constituted by the long bolt 47 and the long nut 45.

  Moreover, when implementing this invention, as a net | network body 34, you may make it use a plate-shaped perforated plate besides the expanded metal 34b, However, An expanded metal is cheaper.

It is a vertical side view which shows the state which packed the filling material in the steel frame structure of one Example of this invention, and constructed | assembled structures, such as a retaining wall. It is a partially longitudinal rear view which shows the upper part side of FIG. 1 from the inner side. It is a partially vertical rear view which shows the lower part side of FIG. 1 from an inner side. It is a vertical side view which expands and shows the lower left part of FIG. It is the whole front view of FIG. 1 which shows the state which the screen material etc. rotate and respond | corresponds to ground subsidence. (A) is a longitudinal side view showing an enlarged view of a net body holding metal fitting that fixes an expanded metal to a screen material, and (b) is a vertical side view showing a state in which an expanded metal overlapping portion adjacent to the screen material is fixed. FIG. (A) is a longitudinal side view showing an enlarged view of a mesh holding metal fitting that fixes an expanded metal in an inclined arrangement to a screen material, and (b) fixes an adjacent expanded metal superposed portion in an inclined arrangement to the screen material. It is a vertical side view which shows the state which exists. (A) is a vertical side view showing the retinal holding member in which the cotter support member is brought close to the tip of the arm and the expanded metal is fixed to the screen material, and (b) is the expanded material for the screen material having an L-shaped cross section. It is a vertical side view which expands and shows the net body holding metal fixture which has fixed the metal. It is a partially exploded perspective view which shows the net body holding metal fitting used in this invention. (A) is a side view of a net body holding metal fitting, (b) is a plan view of the net body holding metal fitting, and (c) is a sectional view taken along line AA of (a). (A) is a front view of a cotter, (b) is a side view of a cotter. (A) is a longitudinal side view showing, in an enlarged manner, a portion in which the expanded metal is fixed to the screen material using a net holding metal fitting of another form, and (b) is an expanded metal superposed portion adjacent to the screen material. It is a vertical side view which shows the state which is fixing. It shows the net body holding metal fitting of another form, and (a) is a side view, (b) is a top view, and (c) is a front view. It is a perspective view which shows the cubic lattice-shaped steel frame of one Example of this invention. (A) is a disassembled perspective view of the connection part of the inclined front pillar material in FIG. 14, a front beam, and a depth beam, (b) is a side view which shows the connection state of the connection part of FIG. It is a partial vertical side view which shows the connection part of a rear part column material, a depth beam, and an inclined member (brace). (A) is a disassembled perspective view of the connection part of the column material and screen material which inclined in the steel free frame of one Example of this invention, (b) is a side view which shows the connection state of the connection part of FIG. . It is a partial vertical side view of the connection part of the up-and-down pillar material inclined when the steel frames of one Embodiment of this invention were stacked. One Embodiment of the taper washer used for the steel frame of this invention is shown, Comprising: (a) is a front view, (b) is a side view. (A) is a vertical side view showing another form of use of the net body holding metal fitting used in the present invention, and (b) is holding the net body using the net body holding metal fitting of another form. It is a vertical side view which shows a state. It is a perspective view which shows one form of the conventional steel frame. It is a figure which shows the conventional form which does not use a net body, and is a schematic front view of a structure such as a sabo dam constructed by filling stones inside stacked steel free frames (the stone filled in the center is Omitted). It is a partially notched rear view which shows the form which fixes the net body which consists of the conventional expanded metal to a screen material by a number line etc. from an inner side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel frame 2 Screen material 3 Front pillar 4 Rear pillar 6 Depth beam 7 Horizontal beam 8 Brace 9 Structure frame 10 Filling material 11 Arm 12 with a locking part 13 Cotter support member 13 Cotter 14 Net body holding metal fitting 15 Locking part 16 Female screw fitting 17 Vertical portion 18 Arm portion 19 Locking groove 20 Male screw portion 21 Arm insertion hole 22 Cylindrical portion 23 Bearing portion 24 Cotter detachment prevention portion 25 Leg portion 26 U-shaped connection portion 27 Mesh body pressing portion 28 Inclined surface 29 Flat part 34 Net 34a Split type net 34b Expanded metal 35 Web part 36 Hole with hole 38 Hole 39 Mounting plate 40 Flange 40c Hole 41 Plate material 44 Taper washer 49 Taper locking body 50 Mesh 51 Gusset plate 52 Superposition part 53 Notch 54 Notch 55 Notch 71 Bearing plate

Claims (4)

A front surface in the left-right direction that is pivotally connected to a large number of pillars that are spaced in the front-rear direction and spaced in the left-right direction, and a pillar that is adjacent in the left-right direction on the front or rear side. A large number of cubic lattice-shaped steel frames are continuous in the left-right direction by the beam material and the rear beam material, and the depth material in the front-rear direction fixed to the front and rear columns, and each cubic lattice-shaped steel A large number of screen materials are attached to the surface located outside the frame at intervals, and a mesh body is arranged inside the cubic lattice steel frame so as to be supported on the inside of the beam material or screen material, and the inside is arranged inside. In the steel frame structure in which the filling material is filled and the steel frame changes following the change of the ground,
In one section surrounded by two column members adjacent to each other on the front and upper and lower front beam members, the one section is divided into a plurality of parts, and a divided net is arranged in each divided part, and the divided A steel frame structure characterized in that the net body is formed by connecting only one of the intermediate portions to a screen material.   2. The steel frame structure according to claim 1, wherein the one section is divided into left and right or up and down, and at least two divided nets are arranged.    2. The steel frame structure according to claim 1, wherein the one section is divided into left and right parts and divided into upper and lower parts, and four divided nets are arranged. The steel frame structure according to any one of claims 1 to 3, wherein the divided mesh body is an expanded metal.

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