JP2023103666A - Shed and construction method thereof - Google Patents

Abstract

To provide a shed that is excellent in workability.SOLUTION: A cantilever type shed 1 has a roof 2 that covers a passage T provided along a slope S on a mountain side, wherein the roof 2 is supported by a retaining wall 3 on the mountain side. A main girder 4 of the roof 2 includes: a main girder body 5 provided in a width direction of the passage T; and a brace part 6 connected to a mountain-side lower part of the main girder body 5 and inclined obliquely downward toward the mountain side. Since a mountain-side end part 5T of the main girder body 5 is fixed to an upper part of the retaining wall 3, and a lower end of the brace part 6 is fixed to a lower support surface 26 of the retaining wall 3, it is connected to the mountain-side lower part of the main girder body 5, and since the brace part 6 is provided inclined obliquely downward toward the mountain side, the retaining wall 3 does not have to be large in order to mount the brace part 6, and a width of the passage T can be ensured.SELECTED DRAWING: Figure 1

Description

The present invention relates to a shed for protecting mountain roads and railroad tracks from falling rocks, landslides, avalanches, etc., and a construction method therefor.

Conventionally, this type of shed includes a shed in which both sides of a roof covering a road along a mountain are supported by pillars, and a shed in which the valley side of the roof is supported by pillars and the mountain side is supported by a retaining wall (for example, Patent Document 1). ).

In the shed of Patent Document 1, since a plurality of pillars are provided on the valley side at intervals in the lengthwise direction of the road, there is a problem that the plurality of pillars obstruct the view. In addition, in places where the ground conditions are poor on the valley side, it is sometimes difficult to construct the foundation work for the columns, and even if it is possible, there is a problem that the foundation construction costs increase.

On the other hand, as a shed that does not need the columns on the valley side, the base end of the precast concrete beam material that constitutes the cantilevered roof is supported by columns erected on the retaining wall on the mountain side, and both sides are supported. and the base end portion is fixed to the mountain side retaining wall (for example, Patent Document 2), or a precast overhang member having an overhang portion constituting the roof is connected to a ground anchor at the tip of the overhang portion, and this There is one in which a ground anchor is fixed to the natural ground (for example, Patent Document 3).

In the shed of Patent Document 2, when the beam is temporarily installed, it is necessary to support the free end of the beam with a support (shoring) erected on the valley side, and the base end of the beam and the mountain side retaining wall Concrete is placed above the retaining wall to fix the retaining wall, and the base end is buried in this concrete and fixed. is expected to be difficult.

In addition, in the shed of Patent Document 2, an intermediate step is formed in the retaining wall, a column is erected on the intermediate step, and beams are fixed to the column and the upper part of the retaining wall. In addition to the increase in man-hours, it takes time to adjust the height of a plurality of beams installed side by side in the direction of the road. Furthermore, there is also the problem that the intermediate stepped portion becomes large because the pillars are erected perpendicularly to the intermediate stepped portion of the retaining wall.

In addition, the shed of Patent Document 3 requires a large-scale work of driving the ground anchor into the natural ground, and in temporary construction work, the mountain side end of the precast outrigger is supported by the ground anchor. etc. should be supported.

JP-A-7-34418 JP-A-59-80506 JP-A-7-247515

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a shed that does not require a shoring for supporting the valley side and is excellent in workability.

In order to achieve the above object, the invention according to claim 1 provides a cantilevered shed comprising a roof covering a passage provided along a slope on the mountain side, the roof being supported by a retaining wall on the mountain side, wherein: The main girder of the roof is provided with a main girder body provided in the width direction of the passage, and a brace portion connected to a mountain side lower part of the main girder body and inclined obliquely downward toward the mountain side, and the main girder body is fixed to the upper part of the retaining wall, and the lower end of the brace part is fixed to the brace support part of the retaining wall.

The invention according to claim 2 is characterized in that a concrete placed portion is provided in the upper part of the retaining wall, and the peak side end portion of the main girder main body is buried in the concrete placed portion.

The invention according to claim 3 is the shed construction method according to claim 1, wherein a body-side base portion is provided at the lower portion of the crest-side end portion of the main girder main body, and a brace-side base portion is provided at the lower portion of the brace portion. A base portion is provided, and anchor bolts are erected on the support portion for the main body of the retaining wall, and the main girder, which is integrally provided with the main girder main body, is moved upward to the main girder side. After inserting the anchor bolt through the base portion and screwing a fixing female screw onto the upper portion of the anchor bolt that has been inserted through the main body side base portion, adjusting the height of the crest side end portion of the main girder main body, It is characterized by adjusting the height of the cane part.

In the invention according to claim 4, after screwing a height-adjusting female screw to the anchor bolt and setting the height of the height-adjusting female screw to a predetermined height, It is characterized in that the anchor bolt is inserted and the body-side base portion is aligned with the height-adjusting female screw.

In the invention according to claim 5, an anchor is provided on the cane-side base portion, a recess for inserting the anchor is formed in the support portion for the cane of the retaining wall, and a lower side of the anchor is inserted into the recess. and after adjusting the height of the brace portion, the recess is filled with a curable filler.

In the invention according to claim 6, a main body side height adjusting screw is screwed into the main body side base portion, and the main body side base portion is attached to the main body supporting portion by the main body side height adjusting screw. and adjust the height of the peak side end of the main girder main body, screw the brace side height adjustment screw into the brace side base portion, and this brace side height adjustment screw The brace-side base portion is supported by the brace support portion, and the height of the brace portion is adjusted.
It is characterized by

According to the structure of claim 1, since the brace portion is connected to the lower part of the main girder body on the mountain side and is inclined obliquely downward toward the mountain side, the size of the retaining wall is increased in order to attach the brace portion. In addition, the width of the passage can be secured.

According to the structure of claim 2, the strength can be ensured by rigidly connecting the peak-side end portion of the main girder main body to the upper portion of the retaining wall with concrete.

According to the structure of claim 3, by screwing the fixing nut onto the upper portion of the anchor bolt, the main body side base portion does not come off from the anchor bolt, and the height of the main girder can be stably adjusted. can be done.

According to the configuration of claim 4, even if there is a construction error in the height of the main body support portion of the retaining wall, if the height of the height adjustment nut is set to a predetermined height with respect to the reference, the main body side The base portion can be adjusted to a predetermined height, and subsequent fine adjustment of the height can be easily performed.

According to the configuration of claim 5, the brace part is fixed to the brace support part by hardening the curable filler filled in the recess while the height of the brace part is adjusted.

According to the configuration of claim 6, the height can be easily adjusted by the height adjusting bolt.

It is a sectional view showing Example 1 of the present invention. It is a front view of a main girder same as the above. It is front explanatory drawing explaining a construction method same as the above, and shows the state which lifted the main girder. It is front explanatory drawing explaining a construction method same as the above, and shows the state which inserts the anchor of a brace part in a recessed part. Fig. 10 is a front view of a main part showing the structure of the crest-side end portion of the main girder main body; FIG. 4 is a front view of a main part before filling with a curable filler; Fig. 3 is a plan view of the main part of the roof with the retaining wall taken as a cross section; It is a top view of the cane part which made the retaining wall a cross section same as the above. Fig. 3 is a cross-sectional view of a connecting portion of the main girder and the horizontal girder of the same; Same as the above, FIG. 10(A) is a cross-sectional view of the fixing structure of the main girder main body with a partial cross section, and FIG. 10(B) is a cross-sectional view taken along line XX of FIG. 10(A). It is a front view of the fixing structure of the brace part which made a part cross section same as the above. FIG. 12 is a sectional view taken along the line YY of FIG. 11; It is sectional drawing of a concrete placing part same as the above. Fig. 3 is a cross-sectional view of the peak-side end portion of the main girder main body; Fig. 3 is a cross-sectional view of the upper portion of the roof of the same;

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments described below do not limit the content of the present invention described in the claims. Moreover, not all the configurations described below are essential requirements of the present invention.

1 to 15 show Embodiment 1 of the present invention. As shown in FIG. 1, the cantilevered shed 1 is installed on a passage T (road, railroad track, etc.) provided along the slope S on the mountain side, and protects the passage T from falling rocks, landslides, avalanches, etc. Protect. Incidentally, the shed 1 of the embodiment is a snow shed.

The shed 1 includes a roof 2 covering a passage T provided along a slope S on the mountain side, and a retaining wall 3 on the mountain side supporting the roof 2. The retaining wall 3 is made of reinforced concrete, and the passage T is formed continuously in the length direction of the The main girders 4 of the roof 2 are made of steel, are provided at intervals in the length direction of the passage T, and are provided in the width direction of the passage T. and is integrally provided with a brace portion 6 inclined obliquely downward toward the mountain side. A plurality of main girders 4 are arranged at intervals in the length direction of the passage T. Incidentally, when the shed 1 is erected, the included angle between the center of the brace portion 6 and the horizontal is about 20 degrees to 50 degrees.

The main girder body 5 has an H-shaped cross section having upper and lower flange portions 11 and 12. As shown in FIG. , and between the lower flange portions 11 and 12, a vertical web portion 13 is provided. In addition, in the attached state of the main girder 4, the upper flange portion 11 is obliquely arranged so that the anti-mountain side is lower than the mountain side.

Further, the cane portion 6 has an H-shaped cross section having upper and lower flange portions 14 and 15, and is formed so that the interval between the upper and lower flange portions 14 and 15 increases from the lower end to the upper end. A vertical web portion 16 is provided between the flange portions 14 and 15 .

The lower flange portion 12 of the main girder body 5 has a lower flange anti-mountain side portion 12A on the anti-mountain side from the position of the bracket portion 6, and this lower flange anti-mountain side portion 12A extends from the anti-mountain side end (tip). It is formed obliquely so that the distance from the upper flange portion 11 opens toward the portion 6, and between the peak side end (base end) and the tip of the lower flange portion 15 of the cane portion 6, it is convex upward. A curved lower flange curved portion 12B is provided. That is, the flat lower flange anti-mountain side portion 12A and the lower flange portion 15 are connected by the lower flange curved portion 12B.

The lower flange portion 12 of the main girder main body 5 includes a lower flange crest-side end portion 12D parallel to the upper flange portion 11 at the crest-side end, and the lower flange crest-side end portion 12D and the upper flange portion 6 of the cantilever portion 6. 14 and a lower flange crest side connecting portion 12C. The lower flange crest side connecting portion 12C is formed obliquely so that the distance from the upper flange portion 11 is widened toward the opposite crest side. Further, the tip of the upper flange portion 14 of the cane portion 6 and the opposite mountain side of the lower flange mountain side connecting portion 12C are connected by a lower flange curved portion 12B' (FIG. 2) curved upwardly.

The retaining wall 3 is integrally provided with a retaining wall body 21 obliquely oriented upward toward the mountain side, and a leg portion 22 provided at the lower portion of the retaining wall body 21 and projecting to the anti-mountain side. The passage T is provided in the upper part of the .

In addition, the retaining wall 3 has an upper supporting surface 23 which is a supporting portion for the main body, which is formed horizontally on the upper surface of the retaining wall body 21. The upper supporting surface 23 is formed in the horizontal direction, The mountain side end portion 5T of 5 is fixed. Furthermore, after the main girder body 5 is fixed to the upper support surface 23, cast-in-place concrete is placed on the upper support surface 23 to form a concrete placed portion 24. This concrete placed portion 24 serves as a retaining wall. It is the upper part of the wall 3 and constitutes part of the retaining wall 3 .

A convex portion 25 is provided on the anti-mountain side 21M of the retaining wall body 21 corresponding to the lower end of the brace portion 6 of the main girder 4, and a lower support surface 26 as a brace support portion is formed on the convex portion 25. , and the lower end of the cane portion 6 is fixed to the lower support surface 26 . The lower support surface 26 is perpendicular to the vertical center line 6S of the cane 6 (FIG. 2). The angle of the lower support surface 26 with respect to the horizontal is smaller than the angle of the anti-mountain side surface 21M with respect to the horizontal.

At the base end of the main girder main body 5 provided with the lower flange crest side end portion 12D, a mounting leg portion 31 made of H-section steel protrudes downward. A web portion 31U connects the flange portions 31F, 31F arranged on the mountain side and the anti-mountain side, which are fixed to the lower surface of the end portion 12D perpendicularly to the lower surface of the end portion 12D. At the lower ends of the mounting legs 31, a plate-like rectangular body-side base portion 32 is provided. The mounting leg portion 31 may be fixed to the lower surface of the lower flange crest side end portion 12D perpendicular to the upper support surface 23, and the mounting leg portion 31 may be provided in the vertical direction.

As shown in FIGS. 2, 13 and 14, on both sides of the web portion 13 of the crest side end portion 5T of the main girder body 5, a plurality of stud dowels (headed dowels) 18 are provided on both sides in the passage length direction. The stud dowels 18 are spaced apart vertically and in the longitudinal direction of the main girder body 5 . Instead of the stud dowel 18, a dowel for attaching concrete such as a perforated dowel (not shown) may be attached to the web portion 13, or both the stud dowel 18 and the perforated dowel may be attached to the web portion 13. , stud dowels 18 or/and perforated dowels may be used.

A plurality (four) of vertical anchor bolts 41 are embedded and fixed in the upper support surface 23 corresponding to the mounting leg portions 31, and the upper portions of the anchor bolts 41 having the screw portions 42 are supported by the upper support surface. While protruding upward from the surface 23, the lower part of the anchor bolt 41 is embedded and fixed to the retaining wall main body 21.例文帳に追加In this example, four anchor bolts 41 are arranged at intervals in the passage width direction and the passage length direction. A height adjusting nut 43 and a fixing nut 44 are screwed to the screw portion 42 with the main body side base portion 32 sandwiched therebetween. Although a plurality of anchor bolts 41 is preferable, the number of anchor bolts 41 is not limited to four, and may be one.

A washer 45 through which the anchor bolt 41 is inserted is disposed between the main body side base portion 32 and the height adjusting nut 43, and between the main body side base portion 32 and the height adjusting nut 43, A washer 45 is arranged through which the anchor bolt 41 is inserted. The height adjusting nut 43 is a height adjusting female screw, and the fixing nut 44 is a fixing female screw.

A plurality of (four) through-holes 32T (FIG. 10) for loosely inserting the anchor bolts 41 are drilled in the body-side base portion 32. The through-holes 32T may have a long length in the width direction of the passage even if they are not circular. It may be a hole. Then, the main girder 4 is raised by a heavy machine 51 or the like, the height adjusting nut 43 is screwed onto the anchor bolt 41, and the height adjusting nut 43 is adjusted to a predetermined height. By placing the main body side base portion 32 on the height adjusting nut 43 so as to insert the anchor bolt 41, the crest side end portion 5T of the main girder main body 5 is set to a predetermined height.

The height adjusting nut 43 and the washer 45 constitute a height adjusting member 46 (FIG. 3) having a female screw portion. By setting the height of the upper surface of the washer 45 to a predetermined height, the main body side base portion 32 can be set to a predetermined height in accordance with the height of the height adjusting member 46, and then, Even if height adjustment is required, fine adjustment is sufficient, and the height adjustment process can be easily performed.

A fixing nut 44 and a washer 45 constitute a fixing member 47 (FIG. 5). screw together. In this way, the fixing member 47 can prevent the body-side base portion 32 from slipping out of the anchor bolt 41 against the force that causes the cantilevered main girder 4 to collapse toward the anti-mountain side due to its own weight, thereby stabilizing the main girder 4. It can be held in a stance.

Further, a female screw portion 32M (FIG. 10) is formed through the corner portion side of the body-side base portion 32 outside the plurality (four) of through holes 32T. With the main girder 4 held in a stable posture as described above, the height adjusting bolt 33, which is a height adjusting screw, is screwed into the female screw portion 32M. A plate-shaped pedestal 34 is arranged on the upper support surface 23, and a cylindrical portion 35 is integrally provided on the upper surface of this pedestal 34, into which the lower end of the adjustment bolt 33 is loosely inserted. The lower end of the height adjusting bolt 33 is inserted into the shaped portion 35, and the lower end of the bolt 33 is brought into contact with the pedestal 34. support the crest end of the

Therefore, in order to finely adjust the crest side end of the main girder main body 5 to be higher, the fixing nut 44 is loosened and moved upward so that the height between the fixing nut 44 and the upper surface of the main girder base portion 32 is adjusted. A position where an adjustment allowance is formed, the main girder main body 5 is lifted by screwing the height adjusting bolt 33, and after the height is finely adjusted, the height adjusting nut 43 is pressed against the lower surface of the main body side base portion 32. After that, the fixing nut 44 is tightened so as to press against the upper surface of the main body side base portion 32 .

On the other hand, in order to finely adjust the crest side end of the main girder main body 5 to be lower, the height adjusting nut 43 is loosened and moved downward, so that the height adjusting nut 43 and the lower surface of the main body side base portion 32 are aligned. A height adjustment margin is formed between them, the height adjustment bolt 33 is turned in the opposite direction, and the height is determined by making fine adjustments so that the main girder 4 is lower. After that, the fixing nut 44 is tightened so as to be in pressure contact with the upper surface of the main body side base portion 32 .

Alternatively, the height adjustment nut 43 is turned and lowered by a fine adjustment amount, and the height adjustment bolt 33 is operated to lower it until the main body side base portion 32 abuts on the height adjustment nut 43 to determine the height. The fixing nut 44 can be lowered until it hits the lowered main body side base portion 32 to adjust the height. Similarly, the fixing nut 44 is turned and raised by the fine adjustment amount, and the height adjustment bolt 33 is operated to raise the fixing nut 44 until the body-side base portion 32 contacts the fixing nut 44 to determine the height. The height adjustment nut 43 can be raised until it hits the raised main body side base part 32 to adjust the height.

A plate-like rectangular brace-side base portion 37 is fixed to the proximal end of the brace portion 6 , and the brace-side base portion 37 is substantially perpendicular to the vertical center line 6</b>S of the brace portion 6 . do. A plurality of through-holes 37T (FIG. 11) for loosely inserting the anchor bolts 41A in the longitudinal direction of the brace-side base portion 37 are drilled in the brace-side base portion 37. It may be an elongated hole that is elongated in the vertical direction. In this example, four through holes 37T are arranged at intervals in the vertical direction and the passage length direction.

Then, the threaded portion 42 of the anchor bolt 41A, which is an anchor, is inserted into the through hole 37T, and the upper and lower nuts 44A and 43A screwed to the anchor bolt 41A sandwich the cane-side base portion 37 from above and below. An anchor bolt 41A is attached to the portion 37 . A washer 45 through which the anchor bolt 41A is inserted is arranged between the cane-side base portion 37 and the nuts 44A and 43A. A washer 45 is arranged through which the bolt 41A is inserted. In addition, a female screw portion 37M (FIG. 11) is formed through the corner portion side of the cane-side base portion 37 outside the four through holes 37T, and the height adjusting bolt 33 is inserted into the female screw portion 37M. screw together.

The lower support surface 26 is formed with recesses 27 into which the four anchor bolts 41A, 41A, 41A, 41A are loosely inserted. It has an inner surface 28U and a lower inner surface 28S, mutually parallel left and right inner surfaces 28L and 28R, and a bottom surface 29. As shown in FIG.

Therefore, in order to finely adjust the height of the lower end of the cane portion 6, the height adjusting bolt 33 is screwed into the female screw portion 37M, and the pedestal 34 is attached to the lower support surface 26 around the recess 27. are arranged, and a height adjusting bolt 33 is applied to the pedestal 34 to support the load applied to the retaining wall 3 from the brace portion 6 by the plurality of height adjusting bolts 33. - 特許庁In this case, the body-side base portion 32 and the anchor bolts 41 oppose the downward force applied to the brace portion 6 in addition to the load perpendicular to the lower support surface 26 from the brace portion 6 .

By turning the height adjusting bolt 33 while supporting the load applied from the brace portion 6 by the height adjusting bolt 33, the height of the brace portion 6 can be adjusted, that is, the lower support surface 26 and the brace can be adjusted. The distance from the side base portion 37 can be adjusted.

Next, a method for erecting the main girder 4 will be described. Before fixing the mounting leg portion 31 to the upper support surface 23, more specifically, before inserting the anchor bolt 41 into the through hole 32T of the main body side base portion 32, the upper support surface 23 is subjected to the above-described operation. Then, the height adjusting nut 43 is set to a predetermined height. In addition, before fixing the brace portion 6 to the lower support surface 26, the anchor bolt 41A is fixed at a predetermined position with respect to the brace-side base portion 37 by the nuts 43 and 44 in the brace portion 6. .

As shown in FIG. 3, the cable body 52 is lifted by a heavy machine 51, the mountain side cable body 52Y and the anti-mountain side cable body 52H are connected to the lower end of this cable body 52, and the mountain side cable body 52Y is connected to the main girder body. 5, and the anti-mountain side cable body 52H is connected to the anti-mountain side of the main girder main body 5. A chain block 53 as a length adjusting means is provided in one of the mountain-side cable body 52Y and the anti-mountain side cable body 52H, in this example, in the middle of the anti-mountain side cable body 52H. The main girder 4 brought into the passage T is lifted by the heavy equipment 51, the main body side base portion 32 is aligned with the upper side support surface 23, the brace side base portion 37 is aligned with the lower side support surface 26, and the chain block 53 The inclination of the main girder 4 in the width direction of the passage is adjusted substantially at the time of erection.

After the main girder 4 is lifted, a worker gets on the bucket 56 of the self-propelled aerial work vehicle 55, and the worker adjusts the chain block 53 to adjust the inclination of the main girder 4. . The bucket 56 is provided so as to be able to move up and down by a tilting arm 57 .

After the main girder 4 is lifted by the heavy machine 51 and the lower end side of the anchor bolt 41A of the brace portion 6 is inserted into the recess 27, the upper portion of the anchor bolt 41 is inserted into the through hole 32T of the base portion 32 on the main body side. The body-side base portion 32 is placed on the height adjusting member 46 . Next, the fixing nut 44 is tightened to sandwich the height adjusting nut 43 and the fixing nut 44 to fix the body-side base portion 32 .

Next, the height adjusting bolt 33 is screwed into both the base portions 32 and 37, the pedestal 34 is arranged at the tip of the height adjusting bolt 33, the pedestal 34 is brought into contact with the support surfaces 23 and 26, and the height is adjusted. The load from the base portions 32 and 37 is supported by the support surfaces 23 and 26 by the adjusting bolts 33 and the base 34 . If fine adjustment of the height is required, the height adjustment nut 43, the fixing nut 44 and the height adjustment bolt 33 are operated as described above to adjust the height and direction of the peak side end of the main girder main body 5. The height of the cane portion 6 is finely adjusted to determine the height, the main body side base portion 32 is fixed by sandwiching nuts 43 and 44, the cane side base portion 37 is supported by the height adjustment bolt 33, and the height is adjusted. adjustment is complete.

When the height adjustment is completed and both base portions 32 and 37 are respectively supported by a plurality of height adjusting bolts 33, the cable body 52 can be removed from the main girder 4 and the main girder 4 is stabilized by the retaining wall 3. supported by

After the height adjustment of the main girder 4 is completed, the cable body 52 is removed from the main girder 4, and the lifting by the heavy machine 51 is released, the main girder 4 adjacent in the length direction of the passage T is replaced with the passage made of H steel. Connected by longitudinal crossbeams. First to fourth crossbeams 61, 62, 63, 64 are used as crossbeams. 5, the second crossbeam 62 is located at the center position between the first crossbeam 61 and the third crossbeam 63, and the fourth crossbeam 64 is located on the mountain side end side. It is Then, as shown in FIG. 9, a vertical gusset plate 66 is fixed to the web portion 13 of the main girder main body 5, and the ends 65T of the web portions 65 of the overlapped transverse girders 61, 62, 63, 64 are connected to each other. The gusset plate is connected by tightening with fixing means (not shown) such as bolts and nuts.

Further, as shown in FIG. 7, the tip side of the main girder main body 5 and the center anti-peak side between the main girders 4, 4 of the second horizontal girder 62 are connected by a brace member 71, and the second horizontal girder 62 The central crest side between the main girders 4 and 4 and the non-mountain side of the connection point of the third cross beam 63 of the main girder body 5 are connected by a brace member 71A, and the crest side of the connection point of the third cross beam 63 of the main girder body 5 is connected. and the central anti-mountain side between the main girders 4, 4 of the fourth horizontal girder 64 are connected by a brace member 71B. These brace members 71, 71A, 71B are braces made of angle steel. A gusset plate 72 is attached by welding or the like to the upper flange portion 11 where the brace members 71, 71A, and 71B are connected, and bolts (not shown) are inserted through the gusset plate 72 and the brace members 71, 71A, and 71B. A nut (not shown) is screwed onto the bolt for connection.

After the height adjustment is completed and the horizontal beams 61, 62, 63, 64 and the brace members 71, 71A, 71B are installed, the formwork is installed on the upper support surface 23 so as to surround the main body side base portion 32 on all sides. The mold 75 is filled with a non-shrinkable mortar 76 as a hardening filler. When the non-shrinkable mortar 76 hardens, a pedestal mortar portion 76A is formed between the upper support surface 23 and the main body side base portion 32. is formed.

On the lower support surface 26, a mold 77 is assembled so as to surround the three sides of the cane-side base portion 37, and the inside of the mold 77 and the recess 27 are filled with non-shrinkage mortar 78 as a hardening filler. Then, the non-shrinkable mortar 76 hardens to form a pedestal mortar portion 78A between the upper support surface 23 and the main body side base portion 32, and a recessed mortar portion 78B is formed in the recess 27. It is integrally formed with 78A.

By repeating the above steps, a plurality of main girders 4 are installed at intervals in the passage length direction, and horizontal girders and brace members are installed.

In the retaining wall main body 21, longitudinal vertical reinforcing bars 81, 82 are embedded on the mountain side and the anti-mountain side, and a plurality of the vertical reinforcing bars 81, 82 are arranged at intervals in the length direction of the passage T. The upper portions of the vertical reinforcing bars 81 and 82 protrude upward from the upper support surface 23 .

As shown in FIGS. 1 and 13, the mountain-side end portion 5T of the main girder body 5 is rigidly connected to the retaining wall body 21 by the concrete placement portion 24 placed on the upper support surface 23. As shown in FIGS. For this reason, the width direction reinforcing bars 83, 84, 85, 86 in the width direction of the passage are arranged in multiple stages in the concrete placing portion 24 before placing, and the width direction reinforcing bars 83, 84, 85, 86 and the vertical reinforcing bars A plurality of longitudinal reinforcing bars 87 are arranged along the passage length direction along the paths 81 and 82 .

An oblique reinforcing bar 88 serving as a corner reinforcing bar is arranged between the peak side end of the uppermost width direction reinforcing bar 83 and the opposite side end of the lowermost width direction reinforcing bar 86 . Further, diagonal reinforcing bars 89 serving as corner reinforcing bars are arranged between the central side of the uppermost width direction reinforcing bars 83 and the lower side of the vertical reinforcing bars 81 on the mountain side.

In addition, on the peak side end portion 5T side of the main girder main body 5, a reinforcing bar 91 of a portal rigid frame structure is provided, and the main girder main body 5 is proximate to the location where the stud dowel 18 of the main girder main body 5 is provided, and the same location is extended to the length of the passage. A plurality of vertical reinforcing bars 91 are arranged at intervals in the width direction of the passage so as to sandwich them from the direction.

Then, a formwork (not shown) for forming the concrete placing portion 24 is assembled, and when the reinforcement arrangement is completed, cast-in-place concrete is poured into the formwork, and after curing, the formwork is removed to form a retaining wall. The crest side end of the main girder main body 5 is rigidly connected to the upper part of 3 .

After installing the horizontal girders 61, 62, 63, 64 and the braces 71, 71A, 71B on the roof 2, the deck plate 101 is mounted on the main girders 4, 61, 62, 63, 64 and the braces 71, 71A, 71B. are laid and attached by attachment means 102 such as stud bolts. A thin steel plate 103 is mounted on the deck plate 101 by mounting means 104 such as roof bolts.

As described above, in this embodiment, the roof 2 is provided to cover the passage T provided along the slope S on the mountain side, and the roof 2 is supported by the retaining wall 3 on the mountain side. In the shed 1, the main girder 4 of the roof 2 includes a main girder body 5 provided in the width direction of the passage T, and a cane portion 6 connected to the mountain side lower part of the main girder body 5 and inclined obliquely downward toward the mountain side. , the crest side end portion 5T of the main girder body 5 is fixed to the upper part of the retaining wall 3, and the lower end of the brace portion 6 is fixed to the lower support surface 26, which is the support portion for the brace of the retaining wall 3. Since the retaining wall 6 is connected to the lower part of the main girder body 5 on the mountain side and is inclined obliquely downward toward the mountain side, the retaining wall 3 does not become large in order to attach the brace portion 6, and the passageway The width of T can be secured.

As described above, in this embodiment, the concrete placed part 24 is provided in the upper part of the retaining wall 3, and the mountain side end 5T of the main girder main body 5 is buried in this concrete placed part 24, corresponding to claim 2. Therefore, the strength can be ensured by rigidly connecting the mountain-side end portion 5T of the main girder main body 5 to the upper portion of the retaining wall 3 with concrete.

As described above, in this embodiment, corresponding to claim 3, in the construction method of the shed 1 according to claim 1, the main girder main body 5 is provided with the main body side base portion 32 below the crest side end portion 5T, A brace-side base portion 37 is provided at the lower portion of the brace portion 6, and an anchor bolt 41 is erected on the upper support surface 23, which is a support portion for the main body of the retaining wall 3, and the brace portion is attached to the main girder body 5. The main girder 4 integrally provided with 6 is moved upward by lifting or the like, the anchor bolt 41 is inserted through the main body side base portion 32, and the fixing nut 44 is attached to the upper portion of the anchor bolt 41 that is inserted through the main body side base portion 32. After screwing together, the height of the crest-side end portion 5T of the main girder body 5 is adjusted, and the height of the cane portion 6 is adjusted. The main body side base part 32 does not come off from the anchor bolt 41, and the height adjustment of the main girder 4 can be stably performed.

As described above, in this embodiment, the height adjusting nut 43, which is a height adjusting female screw, is screwed into the anchor bolt 41, and the height of the height adjusting nut 43 is adjusted to a predetermined height. After setting the height, the anchor bolt 41 is inserted into the main body side base portion 32, and the main body side base portion 32 is aligned with the height adjusting nut 43, so that the upper support surface as the main body support portion of the retaining wall 3 is formed. Even if there is a construction error in the height of 23, by setting the height of the height adjustment nut 43 to a predetermined height with respect to the reference, the main body side base portion 32 can be adjusted to a predetermined height. Subsequent fine adjustment of the height can also be easily performed.

As described above, in this embodiment, the anchor bolt 41A is provided on the brace-side base portion 37, and the anchor bolt 41A is provided on the lower support surface 26, which is the brace support portion of the retaining wall 3. is inserted into the recess 27, the lower side of the anchor bolt 41A is inserted into the recess 27, and the height of the brace portion 6 is adjusted. Since the mortar 78 is filled, the non-shrinkable mortar 78 filled in the recess 27 hardens while the height of the brace 6 is adjusted, thereby fixing the brace 6 to the lower support surface 26 .

As described above, in this embodiment, the height adjusting bolt 33, which is a screw for adjusting the height of the main body, is screwed into the base portion 32 of the main body. 33 supports the main body side base portion 32 against the upper support surface 23 which is the support portion for the main body, adjusts the height of the mountain side end portion 5T of the main girder main body 5, and attaches the cane side base portion 37 to the cane side base portion 37. A height-adjusting bolt 33, which is a height-adjusting screw, is screwed in, and the brace-side base portion 37 is supported by the brace-side height-adjusting bolt 33 against the lower support surface 26, which is a brace support portion. At the same time, since the height of the cane portion 6 is adjusted, the height can be easily adjusted by the height adjusting bolt 33 .

Hereinafter, as an effect of the embodiment, the main girder main body 5 is formed such that the vertical dimension at the portion where the brace portion 6 is connected is large, and the vertical dimension becomes smaller toward the mountain side and the anti-mountain side. Compared to the case of forming with vertical dimensions, it is lighter and superior in strength. Further, the flat lower flange anti-mountain side portion 12A and the lower flange portion 15 are connected by the lower flange curved portion 12B, and the tip of the upper flange portion 14 of the brace portion 6 and the anti-mountain side of the lower flange mountain-side connecting portion 12C are connected. are connected by the lower flange curved portion 12B' that is curved upwardly, the strength of the portion where the brace portion 6 is connected to the main girder main body 5 can be improved.

A mounting leg portion 31 made of H-shaped steel is provided at the mountain-side end portion 5T of the main girder body 5 so as to protrude downward, and a body-side base portion 32 is provided at the lower end of the mounting leg portion 31. A work space can be secured for the main body side base portion 32, and the work related to the main body side base portion 32 can be easily performed. In addition, since a plurality of stud dowels 18 are protruding from the crest side end portion 5T of the main girder body 5 on both sides in the lengthwise direction of the passage, it is possible to ensure the strength of the connection with the concrete placed portion 24 by pouring in-situ concrete. can.

By using the fixing nut 44, the height adjusting bolt 33 on the body side, the height adjusting bolt 33 on the side of the brace, and the heavy machine 51, the need for shoring is eliminated and the non-shrinkage mortar 76, 78 is filled. The lifting by the heavy machinery 51 can be released before, and fine adjustment of the height of the main girder 4 can be performed with the heavy machinery 51 removed. In addition, the heavy machine 51 that has been lifted can be used to temporarily set up horizontal girders and phrase materials.

Anchor bolts 41 are protruded from the upper support surface 23, recesses 27 are formed in the lower support surface 26, and anchor bolts 41A, which are anchors, are protruded from the cane-side base portion 37. By inserting the lower ends of the anchor bolts 41A into the recesses 27 while lifting the main girder 4, the through holes 32T of the main body side base portion 32 are guided above the anchor bolts 41. can be done.

In the retaining wall main body 21, longitudinal vertical reinforcing bars 81, 82 are embedded on the mountain side and the anti-mountain side, and a plurality of the vertical reinforcing bars 81, 82 are arranged at intervals in the length direction of the passage T, The upper portions of the plurality of vertical reinforcing bars 81 and 82 protrude upward from the upper support surface 23, and the widthwise reinforcing bars 83, 84, 85, 86 are arranged in multiple stages in the concrete placing portion 24, and the widthwise reinforcing bars are arranged in multiple stages. 83, 84, 85, 86 and the longitudinal reinforcing bars 81, 82, a plurality of longitudinal reinforcing bars 87 are arranged along the length of the passage, so that the mountain side end 5T of the main girder main body 5 is can be firmly fixed to the retaining wall 3 by

The present invention is not limited to this embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, an example was shown in which the height adjusting bolt was screwed into the female threaded hole formed in the base portion. and a height adjusting bolt may be screwed into the female threaded hole of the nut. Also, in the embodiment, the anchor is attached to the cane-side base portion with a nut, but it may be attached by welding or the like. In addition, various types of height adjusting screws may be used other than bolts as long as they have a male thread portion that is screwed into a female thread portion and a tool engaging portion that engages a rotating tool. be able to. In addition to the nut, the fixing female screw body and the height adjusting female screw body also have a female screw portion that screws into the male screw portion and a tool engaging portion that engages with a turning tool. If there is, various ones can be used. In addition, in the embodiment, the main girder is lifted and moved upward, but the main girder may be lifted while being supported from below and moved upward. be able to.

1 Shed 2 Roof 3 Retaining wall 4 Main girder 5 Main girder body 5T Mountain side end 6 Cane part 23 Upper support surface (main body support part)
24 Concrete placement part 26 Lower support surface (support part for cane)
27 recess 32 body side base portion 33 height adjustment bolt (height adjustment screw)
37 Cane-side base portion 41 Anchor bolt 42 Screw portion 43 Height adjustment nut (height adjustment female screw body)
41A Anchor bolt (anchor)
78 Non-shrinking mortar (curing filler)
S slope T passage

Claims (6)

In a cantilevered shed comprising a roof covering a passage provided along a slope on the mountain side, the roof being supported by a retaining wall on the mountain side,
The main girder of the roof includes a main girder main body provided in the width direction of the passage, and a crosspiece portion connected to a lower part of the main girder main girder body on the mountain side and inclined obliquely downward toward the mountain side,
A shed, wherein the crest-side end portion of the main girder body is fixed to the upper portion of the retaining wall, and the lower end of the brace portion is fixed to the brace support portion of the retaining wall. 2. The shed according to claim 1, wherein a concrete placed portion is provided in the upper part of said retaining wall, and the peak side end portion of said main girder main body is buried in said concrete placed portion. In the construction method of the shed according to claim 1,
A body-side base portion is provided below the peak-side end portion of the main girder main body, and a brace-side base portion is provided below the brace portion,
Anchor bolts are erected on the supporting portion for the main body of the retaining wall,
The main girder body, which is integrally provided with the brace portion, is moved upward, the anchor bolt is inserted through the main body side base portion, and the anchor bolt is inserted through the main body side base portion. A method for constructing a shed, characterized by adjusting the height of the crest-side end of the main girder main body after screwing the fixing female screw, and adjusting the height of the cane portion. After screwing the height-adjusting female threaded body into the anchor bolt and setting the height of the height-adjusting female threaded body to a predetermined height, the anchor bolt is inserted into the main body-side base portion, and the 4. The shed construction method according to claim 3, wherein the body-side base portion is aligned with the height-adjusting female screw. An anchor is provided on the brace-side base portion, a recess for inserting the anchor is formed in the support portion for the brace of the retaining wall, the lower side of the anchor is inserted into the recess, and the brace is inserted into the recess. 5. The method of constructing a shed according to claim 3, further comprising the step of filling the recess with a hardening filler after adjusting the height of the recess. A body-side height adjusting screw is screwed into the body-side base portion, and the body-side base portion is supported with respect to the body support portion by the body-side height adjusting screw, and the main girder body Adjust the height of the mountain side end of the brace, screw the brace side height adjustment screw into the brace side base portion, and use the brace side height adjustment screw to adjust the brace support portion The method for constructing a shed according to any one of claims 3 to 5, characterized in that the brace-side base portion is supported by the brace-side base portion and the height of the brace portion is adjusted.

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