JP6469527B2 - Free angle upset - Google Patents

Description

  The present invention relates to a free angle upset, not only in the straight section of the retaining wall, but also in the protruding corner section and the entering corner section of the corner section of the retaining wall that continues in two directions, and also in the curved section that continues in a polygonal shape or arc shape. It can be installed and can support the retaining wall safely and reliably.

  In root cutting work in construction and civil engineering, it is necessary to prepare for the collapse of a natural ground due to excavation. Generally, as shown in Fig. 7 (a), H-shaped steel or sheet piles are driven into the ground and the mountain retaining wall 20 is In addition to the excavation of the ground, a mountain retaining support made up of an erection 21 and a beam 22 is temporarily installed inside the retaining wall 20 to prevent the collapse of the ground.

  The flank 21 is attached to the inside of the retaining wall 20 horizontally, and is a member that supports earth pressure acting on the retaining wall 20, and the cut beam 22 is bridged between the opposed ridges 21, 21. It is a member that supports earth pressure acting through the abdomen 21. H-shaped steel is mainly used for all the members because of many years of experience, and because it is relatively inexpensive and easy to obtain compared to other steel materials.

  In addition, both the flank 21 and the cut beam 22 are installed as a single material, and in particular, the flank 21 is attached to the inside of the retaining wall 20 one by one. Near both ends are supported by the beam 22. Further, the end portions of the bulges 21 are abutted with each other and joined to each other by a plurality of joining plates and joining bolts.

  Further, for example, in Patent Document 1, a plurality of abdominal erection bodies and a connection mechanism that is provided at one or both ends of the erection body and that connects adjacent abdominal erection bodies and the abdomen that are connected by the connection mechanism. There has been disclosed a flexible belly raising comprising an angle adjusting mechanism for fixing the raising main bodies to each other so as to adjust the angle according to the shape of the excavation surface.

No. 6-38919 JP 2000-144741 No. 7-43166

  However, the method of attaching the flank 21 to the side surface of the retaining wall 20 and installing the cut beam 22 on the side surface is that at least two piercing beams are installed near the both ends of the flank 21. Need to support by 22.

  For this reason, in the section where the mountain retaining wall 20 is continuous in a polygonal shape or in the curved section where the arc is continuous, it is necessary to install a large number of erections 21 and accordingly, it is necessary to install a large number of beams 22 as well. Therefore, it is difficult to secure the working space and the opening space A for carrying out excavated soil and carrying in materials, which may hinder mountain-clamping work and excavation work, and increase the construction cost. was there.

  Also, as shown in FIG. 7 (b), when installing the upright 21 and the cut beam 22 on the concave curved surface side of the retaining wall, the cut beams 22 installed at the same height interfere with each other. I couldn't.

  Furthermore, the universal angle erection described in Patent Document 1 is such that the connecting mechanism that connects adjacent erection bodies can rotate between the adjacent erection bodies, and the length direction of the body can be increased. The connecting bolt is movably connected to each other. Particularly, the connecting bolt has a very small diameter as compared with the main body, so that the work of connecting the adjacent main bodies is to pass the connecting bolt. Presumably difficult because of the positioning of the bolt holes.

  Moreover, since an excessive shearing force acts on the connecting bolt that erections and connects the main bodies to each other due to earth pressure acting on the retaining wall, the connecting bolt may be insufficient in strength.

  The present invention has been made in order to solve the above-described problems. In addition to the straight section of the retaining wall, the corner section of the retaining wall corner that is continuous in two directions, the entering corner section, and the polygonal or circular arc shape. It is intended to provide a universal angle erection that can be installed in curved sections that are continuous to each other and that can support these sections safely and reliably.

  The present invention is an invention of a free angle upset installed at a corner portion of a mountain retaining wall continuous in two directions, and is attached to one wall surface of the mountain retaining wall and the other wall surface. A pair of rotation mechanisms that rotatably connect the adjacent erections to each other along the direction of the retaining wall, and the rotation mechanism is attached to both ends of the adjacent erections. The connecting bracket attached to one end of the adjacent flank is a pair of upper and lower horizontal flanges projecting from the flank end, and is directed upward to the upper and lower horizontal flanges. And a connecting bracket attached to the other end of the adjacent flank is provided with a pair of upper and lower horizontal flanges respectively projecting from the flank end. Down on the top and bottom horizontal flanges Provided, and is intended to take characterized in that it comprises a downward bearing for rotatably circumscribing the rotation axis or the upward rotary shaft rotatably inscribed in the upward bearing.

  The larger the diameter of the bearing and the rotating shaft, the more reliably the shearing force acting by the earth pressure acting on the retaining wall can be transmitted. Further, the safety of the retaining wall can be ensured by connecting the bearing and the rotating shaft, which are rotatably engaged with each other, by the separation preventing pin.

  Furthermore, the connecting bracket can be used for existing abdominal erections, so that the length of the abdominal erection can be adjusted by detachably attaching to the end of the erection. It can be done easily.

  According to the universal angle uplift of the present invention, the upset attached to one wall surface of the mountain retaining wall continuous in two directions, the upset attached to the other wall surface, and the uplifted wall between the uplifted walls. And a rotation mechanism that is coupled to be rotatable in accordance with the direction of the direction, so that the straight section of the retaining wall, as well as the protruding corner section, the entering corner section of the corner section of the retaining wall continuous in two directions, or the polygonal section It can also be installed in curved sections that are continuous in shape or arc shape, and these sections can be supported more safely and reliably.

  In addition, when installing the protuberance adjacent to the wall surface of the mountain retaining wall, the end of the adjoining protuberances is easy by simply dropping the downward rotating shaft or bearing onto the upward bearing or rotating shaft. It is possible to install the apparatus in a connected manner, and with such a configuration, it is possible to easily dismantle and remove the abdomen and to handle it easily.

  Furthermore, a large shearing force acts on the rotating shaft and the bearing at the connecting portion between the adjacent protuberances due to earth pressure acting on the retaining wall, and the shearing force is a shear resistance force of the rotating shaft and an outer periphery of the rotating shaft. It is transmitted by the bearing pressure between the bearing surface and the inner peripheral surface of the bearing, and the earth pressure acting on the retaining wall can be more reliably and especially ensured because the diameter of the rotating shaft and the bearing, that is, the pressure receiving area is much larger than that of the connecting bolt. It is possible to support safely, and this can reduce the number of beams that support the erection.

FIG. 2 is an exploded perspective view of the bellows and the connecting fitting constituting the universal angle bump according to the embodiment of the present invention. FIG. 2 (a) is a plan view, and FIG. 2 (b) is a front view, showing a free angle upset installed inside a corner portion of a mountain retaining wall continuous in two directions. FIGS. 3 (a) and 3 (b) show the free angle upset installed inside the corner portion of the mountain retaining wall continuous in two directions. It is a front view before connection. FIG. 5 is an exploded perspective view of a bellows raising and a connecting metal fitting constituting the universal angle raising according to another embodiment of the present invention. FIG. 5 (a) is a plan view, and FIG. 5 (b) is a front view, showing the free angle bulge shown in FIG. 4 installed inside the corner portion of a mountain retaining wall continuous in two directions. FIG. 6 shows the free angle upset shown in FIG. 4 installed inside the corner portion of the mountain retaining wall continuous in two directions, and FIG. 6 (a) shows the upright main body and the adjusting material constituting the free angle upset FIG. 6B and FIG. 6C are front views before connection. Fig. 7 (a) is a plan view of a mountain retaining wall composed of a sheet pile and a conventional mountain retaining support built inside by a conventional erection and beam, and Fig. 7 (b) is a concave curved side of the mountain retaining wall. It is a top view of the conventional erection and the cut beam installed in the.

  1 to 3 illustrate one embodiment of a universal angle upset installed inside a corner portion of a mountain retaining wall constructed continuously in two directions by a plurality of sheet piles.

  In the figure, a free angle uplift 1 is an uplift 3 attached horizontally to one wall surface 2a of a mountain retaining wall 2 continuous in two directions and an uplift attached horizontally to the other wall surface 2b. 4, the bulge 3, and a rotation mechanism 5 that rotatably connects the ends of the bulge 4.

  The abdominal erection 3 is composed of an erection main body 3a and an adjustment material 3b, and the erection ridge 4 is composed of an erection main body 4a and an adjustment material 4b. The main body 4a and the adjusting material 4b are both formed from H-section steel having the same cross-sectional shape.

  The adjusting materials 3b and 4b are attached to adjust the length of the erection 3 and erection 4 respectively, and several types with different lengths are prepared, and they are erected by using them properly according to the construction site. 3 and upset 4 can be set to the optimum length.

  Further, the flange 3c of the flank main body 3a and the adjusting material 3b and the flange holes 4c of the flank main body 4a and the adjusting material 4b are respectively bolt holes for fastening the ends of the cut beams (not shown). A plurality of 3d and 4d are formed at intervals in the axial direction.

  The erection body 3a and the adjusting member 3b are detachably joined by fastening the end plates 3e, 3e attached to both ends with a plurality of joining bolts 6.

  Further, the abdominal body 4a and the adjusting member 4b are detachably joined by fastening the end plates 4e and 4e attached to both ends with a plurality of joining bolts 6.

  The rotation mechanism 5 is composed of a connecting fitting 7 and a connecting fitting 8 attached to the tip of the adjusting material 3b and the tip of the adjusting material 4b, respectively. The connecting fitting 7 is an end plate attached to the tip of the adjusting material 3b. It is formed by a pair of upper and lower horizontal flanges 7a and 7b projecting in parallel to the adjustment material 4b side from the side surface of 3f, and a bearing 7c and a rotating shaft 7d formed at substantially the center of the upper and lower horizontal flanges 7a and 7b, respectively. ing.

  The upper and lower horizontal flanges 7a and 7b are projected in parallel in the vertical direction at a constant interval, and the outer peripheral portion is formed in a polygonal shape or an arc shape so as not to obstruct the rotation. In the embodiment, it is formed in a polygonal shape.

  The bearing 7c is formed in a very shallow circular cylindrical shape by a rib continuously projecting in a circular shape directly above the upper surface of the lower horizontal flange 7b when viewed in plan. The rotating shaft 7d protrudes a predetermined height directly above the upper surface of the upper horizontal flange 7a, and is formed in a very low circular column shape when seen in a plane.

  The connecting metal fitting 8 includes a pair of upper and lower horizontal flanges 8a and 8b protruding in parallel to the adjustment material 3b side from the side surface portion of the end plate 4f attached to the tip of the adjustment material 4b, and the upper and lower horizontal flanges 8a and 8b. Are formed of a bearing 8c and a rotating shaft 8d formed at substantially the center.

  The upper and lower horizontal flanges 8a and 8b are projected in parallel with a certain interval in the vertical direction and opposite to the upper and lower horizontal flanges 7a and 7b, respectively.

  Further, the outer peripheral portions of the upper and lower horizontal flanges 8a and 8b are formed in a polygonal shape or an arc shape so as not to obstruct the rotation. In the embodiment, it is formed in a polygonal shape like the upper and lower horizontal flanges 7a and 7b.

  The bearing 8c is formed into a very shallow circular cylindrical shape by a rib continuously projecting in a circular shape directly below the lower surface of the upper horizontal flange 8a when viewed in plan. Further, the rotating shaft 8d protrudes a predetermined length directly below the lower surface of the lower horizontal flange 8b, and is formed in a very low circular column shape when seen in a plane. The rotating shaft 8d is inscribed in a rotatable manner on the bearing 7c, and the bearing 8c is inscribed on the rotating shaft 7d in a rotatable manner.

  By being configured in this manner, the erection 3 and the erection 4 can be rotated horizontally together with the connecting fitting 7 and the connecting fitting 8, so that the straight portion of the retaining wall is continuous in two directions. It can also be installed on the inside (entrance corner section) and outside (exit corner section) of the retaining wall corner portion, as well as in a section that continues in a polyhedral shape and a curved section that continues in an arc shape.

  Further, the shearing force (including the axial force) acting between the rotating shaft 8d and the bearing 7c and between the rotating shaft 7d and the bearing 8c at the connecting portion between the rising portion 3 and the rising portion 4 by the earth pressure acting on the retaining wall 2 is as follows. , The shear resistance of the rotating shafts 7d, 8d, and the bearing pressure between the outer peripheral surface of the rotating shafts 7d, 8d and the inner peripheral surface of the bearings 7c, 8c. At this time, the rotating shafts 7d, 8d and the bearing 7c , 8c, that is, the pressure receiving area is much larger than that of the connecting bolt and the connecting pin, the earth pressure acting on the corner portion of the retaining wall can be supported more reliably and safely. This also makes it possible to reduce the number of beams that support the flank end.

  In this case, increasing the outer diameter of the rotating shaft and the inner diameter of the bearing can increase the shear resistance of the rotating shaft and the bearing pressure between the inner peripheral surface of the bearing. Further, instead of the bearing 7c and the bearing 8c, a circular hole in which the rotating shaft 7d and the rotating shaft 8d can be inscribed may be formed in the lower horizontal flange 7a and the upper horizontal flange 8b.

  4 to 6 show another embodiment of the present invention, in which the connection fitting 7 and the connection fitting 8 of the rotating mechanism 5 described with reference to FIGS. By being detachably attached, the existing erections can be used for the erection 3 and the erection 4, and the length adjustment of the erection 3 and the erection 4 is easier. Convenience such as becoming is improved.

  More specifically, the erection 3 and the erection 4 are, as in the embodiment described with reference to FIGS. 1 to 3, respectively, the erection body 3a and the adjustment material 3b, and the erection body 4a and the adjustment material 4b. It is made up of.

  Further, the body 3a and the adjusting member 3b are detachably joined by fastening the end plates 3e and 3e attached to both ends with a plurality of joining bolts 6 to form the body 4a. The adjusting member 4b is detachably joined by fastening the end plates 4e, 4e attached to both ends with a plurality of joining bolts 6.

  Furthermore, the flank main body 3a and the adjustment material 3b, and the flank main body 4a and the adjustment material 4b are all formed of H-section steel having the same cross-sectional shape.

  The fitting 7 fits the fitting grooves 7e and 7e formed at the ends of the upper and lower horizontal flanges 7a and 7b on the adjustment material 3b side to the end plate 3f of the adjustment material 3b, and also forms the fitting groove 7e. The flanges 7f and 7f on both sides and the end plate 3f are detachably attached by fastening them with a plurality of joining bolts 6.

  Similarly, the fitting 8 fits the fitting grooves 8e and 8e formed at the ends of the upper and lower horizontal flanges 8a and 8b on the adjustment material 4b side to the end plate 4f of the adjustment material 4b and the fitting groove 8e. The both side flanges 8f, 8f forming the end plate 4f and the end plate 4f are detachably attached by fastening with a plurality of joining bolts 6.

  Since the connecting fitting 7 and the connecting fitting 8 are detachably attached in this manner, the length adjustment of the flank 3 and the flank 4 becomes easier, and the existing adjustment materials are used as the adjustment materials 3b and 4b. The convenience is very high.

  Further, a plurality of reinforcing ribs 7g are formed on the upper surfaces of the upper horizontal flange 7a and the lower horizontal flange 7b of the connection fitting 7, respectively. The plurality of reinforcing ribs 7g are radially formed between the rotating shaft 7d and the end plate 3f and between the bearing 7c and the end plate 3f so as to extend from the rotating shaft 7d and the bearing 7c side in the direction of the end plate 3f. A guide groove 7h is formed between the end of each reinforcing rib 7g and the rotating shaft 7d so that the rib of the bearing 8c engages.

  Similarly, a plurality of reinforcing ribs 8g are formed on the lower surfaces of the upper horizontal flange 8a and the lower horizontal flange 8b of the connection fitting 8, respectively. The plurality of reinforcing ribs 8g are radially formed between the rotating shaft 8d and the end plate 4f and between the bearing 8c and the end plate 4f so as to extend from the rotating shaft 8d and the bearing 8c side in the direction of the end plate 4f. Further, a guide groove 8h is formed between the end of each reinforcing rib 8g and the rotating shaft 8d to engage the rib of the bearing 8c.

  Thus, by forming the reinforcing ribs 7g and 8g and the guide grooves 7h and 8h, the connecting fitting 7 and the connecting fitting 8 can be strongly reinforced, and the rotating shaft 7d, the bearing 8c, and the rotating shaft 8d can be strengthened. And the bearing 7c can be smoothly rotated by being guided by the guide grooves 7g and 8g, respectively.

  Further, since the bearing 7c and the rotating shaft 8d, and the bearing 8c and the rotating shaft 7d are connected by the separation preventing pins 9, respectively, the bearing 7c and the rotating shaft 8d, and the bearing 8c and the rotating shaft 7d are caused by unexpected loads. It is possible to prevent the gaps from being separated and to ensure safety.

  The present invention can be installed not only in the straight section of the retaining wall, but also in the protruding corner section and the entering corner section of the corner section of the retaining wall that is continuous in two directions, and in the curved section that is continuous in a polygonal shape or arc shape. The earth pressure acting on the wall can be reliably and safely supported.

1 Free angle upset 2 Mountain retaining wall
2a One retaining wall
2b The other retaining wall
3 Upset
3a Upset body
3b Adjustment material
3c flange
3d bolt hole
3e End plate
3f End plate 4 Raising
4a Upset body
4b Adjustment material
4c flange
4d bolt hole
4e End plate
4f End plate 5 Rotating mechanism 6 Joining bolt 7 Connecting bracket
7a Top horizontal flange
7b Lower horizontal flange
7c bearing
7d rotation axis
7e Mating groove
7f flange
7g reinforcement rib
7h Guide groove 8 Connecting bracket
8a Top horizontal flange
8b Bottom horizontal flange
8c bearing
8d rotation axis
8e Mating groove
8f flange
8g reinforcement rib
8h Guide groove 9 Detachment prevention pin

Claims (3)

  In a free angle erection installed at a corner portion of a mountain retaining wall that is continuous in two directions, an erection raised on one wall surface of the mountain retaining wall and an angry bump attached on the other wall surface A rotation mechanism for connecting adjacent erections so as to be rotatable along the direction of the retaining wall, and the rotation mechanism comprises a pair of connecting fittings attached to both ends of the adjacent erections. The connecting fitting attached to one end of the adjacent flank includes a pair of upper and lower horizontal flanges projecting from the flank end and bearings provided upward on the upper and lower horizontal flanges, respectively. Alternatively, the connection fittings provided with the rotation shaft and attached to the other end of the adjacent flank are respectively connected to the pair of upper and lower horizontal flanges respectively protruding from the flank end and the upper and lower horizontal flanges. It is provided downwards Universal angle wale which characterized in that it comprises a downward bearing for rotatably circumscribing the rotation axis or the upward rotary shaft rotatably inscribed in the upward bearing.   2. The universal angle raising according to claim 1, wherein the bearing and the rotary shaft are connected by a separation preventing pin.   3. The universal angle erection according to claim 1, wherein the connecting fitting is detachably attached to an end of the erection.

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