JP2013072264A - Beam retaining rotary piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam retaining rotary piece capable of bonding an end of a strut and an end of an angle brace to a side face part of a wale at an arbitrary angle and sufficiently and safely coping with a great soil pressure acting on the wale.SOLUTION: The beam retaining rotary piece comprises a lower piece 7 attached to the side face part of a wale 2 and an upper piece 8 attached to the end of a strut 3 or the end of angle braces 5 and 6. The lower piece 7 comprises a lower base part 9 including a plurality of bolt holes 11, and a lower beam receiving part 10 projected on an upper surface of the lower base part 9, and including a circular arcuate contact surface part 12 whose center axis is a line in parallel with a direction perpendicular to an axis of the wale 2 at an upper end part. The upper piece 8 comprises an upper base part 17 having a plurality of bolt holes 19, and an upper beam receiving part 18 projected on a lower surface of the upper base part 17, and including a fitting concave part 20 formed in a circular arcuate concave surface shape whose center axis is a line in parallel with the direction perpendicular to the axis of the wale 2 at a lower end part, to which the circular arcuate contact surface part 12 is freely rotatably inscribed and fitted.

Description

  The present invention relates to a beam receiving rotating piece for joining the end of a cutting beam and the end of a fire beam to the side surface of the flank, in a mountain retaining support for preventing collapse of the ground or outflow of earth and sand, The end of the cut beam and the end of the fire beam can be joined to the side surface portion of the erection at an arbitrary angle, and a large earth pressure acting on the erection can be dealt with sufficiently and safely.

  In general, when constructing underground structures and buried objects, a mountain retaining wall made up of a number of sheet piles, etc. is temporarily installed to protect the side of excavation and prevent the surrounding ground from collapsing and sediment discharge. On the inner side of the mountain retaining wall, a mountain retaining support made up of erected, cut beams, fire beams and the like is temporarily installed.

  Normally, the erection is attached horizontally to the inside of the retaining wall, and the cut beam is stretched horizontally by pushing the end at a right angle to the side of the erection, and the abdomen is attached by an adjustment jack, hydraulic jack, etc. Strongly pressed against the wake.

  In addition, a fire beam is bridged between the erection and the cutting beam. Usually, the fire beam is installed on the erection side and the beam side at a firing angle of 30 degrees to 60 degrees, respectively. When designing the cross-section, it is particularly advantageous for determining the design span (effective span) of the erection, for example, 60 degrees on the erection side, 30 degrees on the beam side, or on the erection side, It is often installed at a firing angle of 45 degrees on both beam sides.

  In addition, when the firing angle is 60 degrees, 45 degrees, and 30 degrees, both ends of the fire beam are erected and 30 degrees with the flank piece and the cut beam for reasons of labor saving and efficiency improvement, respectively. Both the hot-fire piece, the abdomen side, and the beam side are bolted together via a 45-degree hot-fire piece.

  When joining at other firing angles, for example, as shown in FIGS. 6 (a) to 6 (c), firing such as a fire receiving box or a fire receiving piece that receives the fire beam 31 on the flank 30 side. The receiving member 32 is attached, and the angle adjustment is performed by filling the packed concrete 33 between the end of the fire striking beam 31 and the fire striking receiving member 32.

No. 5-16284 No. 7-12429 JP 2006-138125 A

  However, joining with the 30 °, 45 ° and 60 ° fire receiving pieces not only cannot be joined at other firing angles, but the angle adjustment cannot be freely performed.

  In addition, joining with a firebox and bagged concrete has problems such as not only inferior strength reliability but also reduced construction efficiency.

  The present invention has been made in order to solve the above-described problems, and it is possible to join the end portions of the cut beam and the fired beam to the side surface portion of the flank at an arbitrary angle, and to the earth pressure acting on the flank. It is an object of the present invention to provide a beam receiving rotating piece that can be handled sufficiently and safely.

  The beam receiving rotary piece according to claim 1 is a beam receiving rotating piece for joining an end portion of a cut beam or a fired beam at an arbitrary angle to a side surface portion of the flank, and the side portion of the flank A lower piece attached to the end of the beam or fire beam, and the lower piece protrudes from a lower base portion having a plurality of bolt holes and an upper surface of the lower base portion. A lower beam receiving portion having an arcuate contact surface portion whose center axis is a line parallel to a direction perpendicular to the erected axis, wherein the upper piece has an upper base portion having a plurality of bolt holes, and the upper portion A fitting projecting on the lower surface of the base portion, having a concave curved surface with a line parallel to the direction perpendicular to the flank axis as a central axis, and the arc-shaped contact surface portion being rotatably inscribed and fitted An upper beam receiving portion having a recess is provided. And it is characterized in and.

  In the present invention, when the end of the cut beam cannot be joined to the side surface of the flank at a right angle, or when the end of the fire beam is attached to the side of the flank by a 30 °, 45 ° or 60 ° Even if it is not possible to join, the end of the cut or fired beam can be joined to the side of the flank at any angle, and the large earth pressure acting on the flank can be dealt with sufficiently and safely It is a thing.

  According to the present invention, the abutting surface portion formed in the lower beam receiving portion of the lower piece and the fitting concave portion formed in the upper beam receiving portion of the upper piece are rotatably inscribed and fitted, The end of the cut beam can be joined to the side surface of the side wall at an angle other than a right angle, and the end of the fired beam can be joined to the side surface of the abdomen at any angle other than 30 degrees, 45 degrees or 60 degrees. Can be easily joined.

  Furthermore, the bearing surface structure in which the abutment surface portion of the lower beam receiving portion and the fitting recess of the upper beam receiving portion are rotatably inscribed and both are in surface contact with each other provides extremely high strength against axial compression. It is possible to cope with a large earth pressure acting on the raising sufficiently and safely.

  Both the lower piece and the upper piece can be easily manufactured by casting or welding a plurality of plates. Casting is particularly suitable for mass production, and manufacturing by welding is necessary when manufacturing as necessary. It can be produced at a low price.

  The beam receiver rotating piece according to claim 2 is a beam receiver rotating piece according to claim 1, wherein the fan formed by the arc of the contact surface portion of the lower beam receiving portion of the lower piece and the center of the arc is divided into two. The symmetric axis is inclined to one side with respect to the direction perpendicular to the axial direction of the flank, and resists the axial force from the beam or fire beam on the opposite side of the symmetric axis of the lower piece. This is characterized in that reinforcing ribs are formed (FIG. 1B).

  In FIG. 1 (b), A is the arc of the contact surface of the lower beam receiving portion of the lower piece, B is the center of the arc I, C is the sector formed by the arc I and the center RO of the arc I, Reinforcing ribs that resist axial forces from the beam or fire beam, and L is the axis of symmetry that bisects the fan-shaped section.

  In particular, the present invention provides for a large axial force acting on a cutting beam and a fired beam that are inclinedly joined to the side surface portion of the flank, and particularly for a beam receiving part to which the cut beam or the fired beam is joined. Since the reinforcing rib is formed on the opposite side so as to face the cut beam or the fire beam, the earth pressure acting on the erection can be held more firmly.

  The reinforcing rib may be formed integrally with the lower base portion and the beam receiving portion, or may be formed by retrofitting the rib material by welding or the like. In addition, what is necessary is just to change the direction of a lower piece to the opposite direction according to this, when the direction of a cutting beam or a fire beam becomes opposite.

  The beam receiver rotating piece according to claim 3 is characterized in that, in the beam receiver rotating piece according to claim 2, an inclination angle of the symmetry axis with respect to the axial direction of the erection is 60 to 75 °. Yes (see Figure 1).

  If the inclination angle α of the symmetric axis L with respect to the axial direction of the flank is within this range, if the cut beam or the fire beam is joined to the flank, the approximate axial force acting via the cut beam or the fire beam In contrast, the reinforcing rib can be effectively acted on. Moreover, not only the state in which the cutting beam or the fired beam is inclined with respect to the upset, but also a right angle can be joined.

  In addition, the inclination angle α of the symmetry axis X with respect to the axial direction of the erection is 60 °, and a cut beam or the like can be received at an angle of 30 to 90 °, and the inclination angle α is 67.5 °, A cut beam or the like can be received at an angle of 30 to 105 °. Furthermore, when the inclination angle α is 75 °, a cut beam or the like can be received at an angle of 30 to 120 °.

  The beam receiving rotating piece according to claim 4 is the beam receiving rotating piece according to any one of claims 1 to 3, wherein one or both of the lower beam receiving portion of the lower piece and the upper beam receiving portion of the upper piece. In addition, reinforcing ribs are formed on both sides of the erected shaft in the direction perpendicular to the axis.

  The present invention provides for the buckling failure of the lower beam receiving portion and the upper beam receiving portion due to axial compression that acts particularly through a cut beam or a fired beam, and the reinforcing rib in this case is formed by welding a rib material or the like. It can be easily formed by retrofitting.

  The beam receiving rotary piece according to claim 5 is the beam receiving rotating piece according to any one of claims 1 to 4, wherein a plurality of bolt holes are formed in a plurality of rows in the axial direction in which the lower base portion of the lower piece is erected. And the interval between the bolt holes in each row is different for each row.

  Since there are various types of bellows with different diameters and gaps between bolt holes, the so-called “staggered arrangement” is used for the bolt holes in the lower base part. It is designed to be able to handle different types of abdominal upsets with a single lower piece.

  In the present invention, the contact surface portion formed in the lower beam receiving portion of the lower piece and the fitting concave portion formed in the upper beam receiving portion of the upper piece are rotatably inscribed and fitted, so that the side surface of the abdomen The end of the cut beam can be easily joined to any angle other than a right angle, and the end of the fired beam can be joined to the side surface of the flank at any angle other than 30 degrees, 45 degrees or 60 degrees. Can be easily joined at an angle.

  In addition, the bearing surface structure of the lower beam receiving part and the fitting recess of the upper beam receiving part are inscribed in a freely rotatable manner and both are in surface contact with each other. It is possible to sufficiently and safely cope with a large earth pressure acting on the abdomen.

  Furthermore, even when a cut beam or a fire beam is inclined and joined to the side surface of the flank, the reinforcing rib is formed on the opposite side of the beam receiving portion to which these beams are joined. It is possible to hold the earth pressure acting on the bush more firmly and safely.

FIG. 4A shows a joint portion between the flank and the cut beam and the fire beam. FIG. 5A shows the side surface portion of the flank and the end portion of the cut beam and the fire beam by the beam receiving rotating piece, respectively 60 degrees, 30 degrees, and 75. FIG. 6B is a plan view showing a state in which the beams are joined at an angle of degrees, and FIG. 5B is an explanatory diagram showing a relative positional relationship between the cut beam or the fired beam and the reinforcing rib. It is a top view which shows the state by which the edge part of the fire-fired beam was joined to the side part of the flank by the beam receiving rotation piece at an angle of 60 degrees. The junction part of the erection by a beam receiving rotation piece and a fire beam is shown, (a) is a top view, (b) is a II line sectional view in (a). The lower piece is shown, (a) is a plan view, (b) is a rear view, and (c) is a left side view. An upper piece is shown, (a) is a top view, (b) is a bottom view, (c) is a left side view, and (d) is a cross-sectional view along the roll line in (c). (a), (b) is a perspective view which shows the prior art example of the method of joining a cutting beam and a fire beam to the side part of a flank, (c) is the top view.

  1 to 5 show an embodiment of the present invention. In FIG. 1, a plurality of erections 2 are installed inside a mountain retaining wall 1 made up of a number of sheet piles, etc. The end portion of the cut beam 3 is joined to the side surface portion via the beam receiving rotating piece 4 at an angle of 60 degrees.

  In addition, the fire beam 5 and the fire beam 6 are installed on both sides of the cut beam 3, respectively, and the fire beam 5 is at an angle of 30 degrees with the beam receiving rotating piece 4 on the side surface of the flank 2 and the fire beam 6 is Each of them rises at an angle of 75 degrees and is joined to the side surface of 2.

  In FIG. 2, the end of the cut beam 3 rises up and is joined directly to the side surface of the 2 at a right angle without a beam receiving rotating piece, and the ends of the fire beam 5 and the fire beam 6 rise up. The two side surfaces are joined to each other through a beam receiving rotary piece 4 at a firing angle of 60 degrees.

  The beam receiving rotary piece 4 is composed of a lower piece 7 attached to the side surface of the erection 2 and an upper piece 8 attached to the ends of the beams 3, 5 and 6. It is configured. FIG. 3 illustrates a state in which the end of the fire beam 5 is joined to the side surface of the erection 2 via the beam receiving rotary piece 4.

  The lower piece 7 is a flat rectangular lower beam receiving portion 10 which is erected in the center of the upper surface of the rectangular plate-like lower base portion 9 whose long side is the axial direction of the flank 2 and whose long side is the axial direction of 2. (See FIG. 4).

  A plurality of bolt holes 11 are formed in the lower base portion 9. The bolt holes 11 are erected on both sides of the lower beam receiving portion 10 and are formed at predetermined intervals in the axial direction of 2.

  In addition, the position of the bolt hole 11, a diameter, and a space | interval are formed so that it can attach to the existing existing raising material. For example, the bolt holes 11 are erected on both sides of the lower beam receiving portion 10 so that the pitch of the bolt holes 11 in the outer row is widened in two rows in the two axial directions, and the pitch of the bolt holes 11 in the inner row is wide. Are formed smaller than the outer rows (not shown) and have a so-called staggered arrangement.

  Further, a contact surface portion 12 having a circular shape in a side view with a line parallel to the direction perpendicular to the axis 2 is formed at the upper end of the lower beam receiving portion 10, and both sides of the lower beam receiving portion 10 are formed. A screw hole 10a is formed in the surface portion.

  Further, the first reinforcing rib 13 or the first reinforcing rib 13 and the second reinforcing rib 14 are erected from the lower beam receiving portion 10 and adjacent to the lower base 9 in the axial direction, and the lower base portion 9 and the lower beam receiving portion are provided. It is formed integrally with the part 10.

  The first reinforcing rib 13 and the second reinforcing rib 14 are formed integrally with each other in the same plane as the lower beam receiving portion 10 and the contact surface portion 12, and the lower beam receiving portion 10 is erected and sandwiched in the axial direction of 2. Thus, it is formed so as to face the ends of each of the beam 3, the fire beam 5 and the fire beam 6.

  That is, the first reinforcing rib 13 and the second reinforcing rib 14 are installed with the lower beam receiving portion 10 interposed on substantially the extension line of the material axis of each beam of the cut beam 3, the fire beam 5 and the fire beam 6. .

  Since the first reinforcing rib 13 and the second reinforcing rib 14 are formed in this way, the beam 3, the fired beam 5, and the fired beam 6 that are obliquely joined to the side surface of the flank 2 are provided on each beam. Even a large axial compression force acting can be effectively resisted.

  The first reinforcing rib 13 and the second reinforcing rib 14 may be formed integrally with the lower beam receiving portion 10, or formed by attaching a rib material by welding or the like like the second reinforcing rib 14. May be. In some cases, the second reinforcing rib 14 may be omitted.

  Further, a plurality of third reinforcing ribs 15 are formed symmetrically on both sides of the lower beam receiving portion 10 and integrally with the lower base portion 9 and the lower beam receiving portion 10.

  The third reinforcing rib 15 can cope with buckling failure of the lower beam receiving portion 10 due to a large axial compressive force acting on each of the beam 3, the fire beam 5 and the fire beam 6.

  The lower piece 7 formed in this way is attached to the side surface portion of the erection 2 by a plurality of mounting bolts 16 that penetrate the bolt holes 11 of the lower base portion 9 and the bolt holes 2a formed in the erection 2. Yes.

  The upper piece 8 is formed with a flat rectangular upper beam receiving portion 18 that is erected in the center of the lower surface of the rectangular plate-like upper base portion 17 and has a long side in the axial direction of the two (see FIG. 5). .

  In the upper base portion 17, a plurality of bolt holes 19 are formed in the vicinity of each corner portion of the upper beam receiving portion 18.

  A lower curved portion of the upper beam receiving portion 18 is fitted with a concave curved surface with an inner diameter substantially the same as the radius of the abutting surface portion 12 of the lower beam receiving portion 10 with the center axis being a line erected and parallel to the direction perpendicular to the two axes. A joint recess 20 is formed.

  Further, guide plates 21 are respectively attached to both sides of the fitting recess 20 in the direction perpendicular to the axis of the flank 2, and reinforcing ribs 22 are symmetrically attached to the side of the guide plate 21 in the direction perpendicular to the axis of the flank 2. Yes. The reinforcing rib 22 is integrally attached to the guide plate 21 and the upper base portion 17 by welding or the like.

  The upper piece 8 configured in this way has a plurality of mounting bolts that penetrate through the bolt holes 19 of the upper base portion 17 through the adjustment jacks 23 at the ends of the beams 3, 5 and 6. 24 is attached. In FIG. 3, the upper piece 8 is attached to the end of the fire beam 5.

  Further, the fitting concave portion 20 of the upper beam receiving portion 18 and the contact surface portion 12 of the lower beam receiving portion 10 are inscribed and fitted so as to be rotatable in the circumferential direction, and the cut beam 3, the fire beam 5 and the fire beam 6. The length of each beam is adjusted by operating the adjustment jack 23 so as to fit the position where each beam is installed.

  With the above configuration, the contact surface portion 12 formed on the lower beam receiving portion 10 of the lower piece 7 and the fitting recess 20 formed on the beam receiving portion 18 of the upper piece 8 are inscribed and fitted in the circumferential direction. The end of each of the beam 3, the fire beam 5, and the fire beam 6 can be erected via the beam receiving rotating piece 4 and joined to the side surface part of the beam 2 at an arbitrary angle. it can.

  In the embodiment, the first reinforcing rib 13 and the second reinforcing rib 14 are formed on the lower piece 7, so that the lower piece 7 and the upper piece 8 have the contact surface portion 12 and the fitting concave portion 20 inscribed. The joints are joined in the range of 30 ° to 75 ° in the fitted state, and the inclination angle α of the symmetry axis L with respect to the axial direction of the flank 2 is 67.5 ° (see FIG. 1).

  Further, the contact surface portion 12 of the lower piece 7 and the fitting recess 20 of the upper piece 8 are inscribed and fitted, and the strength against the axial compression force is extremely large due to the bearing structure in which both surfaces come into surface contact. The end of the raised beam 2 of the cut beam 3, the fired beam 5 and the fired beam 6 that support a large earth pressure can be raised, and can be firmly joined to the side surface of the 2 However, it is possible to cope with a large earth pressure acting on the shim 2 sufficiently and safely.

  Next, the installation procedure of the cut beam 3, the fire beam 5 and the fire beam 6 will be described.

(1) First, the lower piece 7 and the upper piece 8 of the beam receiving rotating piece 4 are attached to the ends of the beam 3, the fire beam 5 and the fire beam 6.

  The upper piece 8 is attached to the end portion of each beam by a plurality of mounting bolts 24 penetrating the bolt holes 19 of the upper base portion 17 together with the adjusting jack 23 at the end portion of each beam.

  In addition, the lower piece 7 has the contact surface portion 12 of the lower beam receiving portion 10 inscribed in the fitting recess 20 of the upper piece 8 and penetrates the bolt hole 21a formed in the guide plate 21, thereby the lower beam receiving portion. 10 is attached to the upper piece 8 by a connecting screw 25 screwed into a screw hole 10a formed on both side surface portions.

(2) Next, the cut beam 3 to which the beam receiving rotary piece 4 is attached is erected and hung inside the 2, and the lower base portion 9 of the lower piece 7 is erected and attached to the side surface of the 2. Then, the lower piece 7 is erected by a plurality of mounting bolts 16 penetrating the bolt hole 11 of the lower base part 9 and the erection 2 of the lower base part 2, and bolted to the side surface of 2. Then, the length of the cut beam 3 is adjusted by operating the adjustment jack 23 so as to fit the position where the cut beam 3 is installed.

(3) Next, the fire beam 5 and the fire beam 6 to which the beam receiving rotary piece 4 is attached are suspended in order on both sides of the cut beam 3. Then, the ends of the fire beam 5 and the fire beam 6 on the cut beam 3 side are bolted to the side surfaces of the cut beam 3 via the joining pieces 26, respectively.

(4) Next, the end portion of the fire beam 5 and the fire beam 6 on the flank 2 side is joined to the side surface portion of the flank 2 in the same manner as the end portion of the cut beam 3 on the flank 2 side. . Then, the adjustment jack 23 is operated to adjust the lengths of the fire beam 5 and the fire beam 6 so as to fit the positions where the fire beam 5 and the fire beam 6 are respectively installed. The installation of the cut beam 3 and the fired beams 5 and 6 is completed by the above construction procedure.

  The present invention can join the ends of the cut beam and the fire beam to the side surface of the flank at an arbitrary angle, and can sufficiently and safely cope with a large earth pressure acting on the flank. .

DESCRIPTION OF SYMBOLS 1 Mountain retaining wall 2 Raised part 2a Bolt hole 3 Cutting beam 4 Beam receiving rotation piece 5 Fire driving beam 6 Fire driving beam 7 Lower piece 8 Upper piece 9 Lower base part 10 Lower beam receiving part 11 Bolt hole 12 Contact surface part 13 First Reinforcing rib 14 Second reinforcing rib 15 Third reinforcing rib 16 Mounting bolt 17 Upper base portion 18 Upper beam receiving portion 19 Bolt hole 20 Fitting recess 21 Guide plate 22 Reinforcing rib 23 Adjusting jack 24 Mounting bolt 25 Connecting screw 26 Joining piece

Claims (5)

  A beam receiving rotating piece for joining an end of a cut beam or a fire beam at an arbitrary angle to a side surface of the flank, a lower piece attached to the side surface of the flank, An upper piece attached to an end of the fire beam, and the lower piece protrudes from the lower base portion having a plurality of bolt holes and the upper surface of the lower base portion, and is parallel to the direction perpendicular to the erection axis A lower beam receiving portion having an arcuate contact surface portion with a center line as a central axis, the upper piece projecting from an upper base portion having a plurality of bolt holes and a lower surface of the upper base portion; An upper beam receiving portion having a concave curved surface with a line parallel to the perpendicular direction of the raised axis as a central axis and having a fitting concave portion in which the arc-shaped contact surface portion is rotatably inscribed and fitted. A beam receiving rotating piece characterized by being made.   2. The beam receiving rotary piece according to claim 1, wherein a symmetrical axis that bisects a sector formed by an arc of a contact surface portion of a lower beam receiving portion of the lower piece and a center of the arc is an axis of the abdomen Reinforcing ribs that are inclined to one side with respect to the direction perpendicular to the direction and that resist the axial force from the beam or fire beam are formed on the side of the lower piece opposite to the axis of symmetry. Rotating piece with beam support.   3. The beam receiving rotary piece according to claim 2, wherein an inclination angle of the symmetry axis with respect to the axial direction of the erection is 60 to 75 °.   The beam receiver rotating piece according to any one of claims 1 to 3, wherein one or both of the lower beam receiving portion of the lower piece and the upper beam receiving portion of the upper piece are arranged in a direction perpendicular to the axis of the bulge. A beam receiving rotary piece characterized in that reinforcing ribs are formed on both sides.   The beam receiving rotary piece according to any one of claims 1 to 4, wherein a plurality of bolt holes are formed in a plurality of rows in the erection axial direction in the lower base portion of the lower piece, and the bolt holes of each row Beam receiving rotating piece characterized in that the interval is different for each row.

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