JP4986574B2 - Concrete member installation structure - Google Patents

Description

  The present invention relates to a concrete member installation structure in which the other concrete member is installed on one of the separately manufactured concrete members.

  As is well known, since concrete products such as box culverts and L-shaped retaining wall blocks are difficult to be integrally molded in a large type, each concrete member is divided and manufactured using a predetermined formwork. It is constructed by joining concrete members at the construction site.

  If it demonstrates roughly based on FIG. 13, the box culvert 1 will be formed in the closed cross section which several are connected using a PC steel bar etc. and has a hollow part inside. Specifically, each box culvert 1 includes a U-shaped upper wall block 2 constituting an upper side, a pair of L-shaped side wall blocks 3 constituting both sides, and a low wall block 4 constituting a bottom side. The upper wall block 2 and the both side wall blocks 3 are separately manufactured.

  At the construction site, the both side wall blocks 3 are installed at a predetermined interval, and the bottom wall block 4 is formed between the lower end portions of the both side wall blocks 3 with concrete made in the field.

  After the concrete placement, as shown in FIG. 14, the upper wall block 2 is lifted by a crane 5 and, as shown in FIG. 15, the upper wall is placed on the guide pin 7 of the upper end portion 6 of the both side wall blocks 3. The guide pin holes 9 of the both leg portions 8 of the block are fitted, and the both leg portions 8 are installed on the upper end portions 6 of the both side wall blocks 3.

  After this installation work, the PC steel rod is inserted into the PC steel rod hole 61, nuts are fastened to the upper and lower ends of the PC steel rod, and the both leg portions 8 are connected to the upper end portions 6 of the both side wall blocks 3. Yes.

  The present invention has been developed to solve the problems of known and public technologies without conducting prior art searches, and the prior art known to the applicant is not a known literature invention but prior art document information. Does not exist.

  However, conventionally, both the leg portions 8 are installed on the upper end portions 6 of the both side wall blocks 3 by crane operation, and therefore, as shown in FIG. Many.

  In this case, although the installation position of the both leg portions 8 is adjusted by using the burl 10, there is a possibility that the joint surface of both 3.8 is damaged. In addition, since the installation position must be adjusted manually, accurate position adjustment is difficult, workability is poor, and construction costs may increase.

The inventions of claims 1 to 7 are technical ideas created in order to solve the above-mentioned problems, and the invention of claim 1 is a concrete method for constructing a concrete product that has been separately manufactured at a construction site. on the member a mounting structure of a concrete member mounting the other concrete element, on one of the mounting jig placed on the side surface of the concrete member, a guide groove for guiding the feeding member side of the other concrete element The guide groove includes a lower groove on the groove bottom side and an upper groove having a groove width extending from the lower groove toward the opening, and the other concrete member is used as one concrete member. The feed member is guided from the upper groove to the lower groove along the groove wall of the guide groove when being lowered toward It is characterized by mounting the Nkurito member.

Therefore, when the other concrete member is lowered by a crane or the like, the feeding member is guided along the groove wall, and the other concrete member can be installed at an accurate position on one concrete member.

According to a second aspect of the invention, the feed member is characterized and a signed benzalkonium the shank of the bolt to the nut embedded in the side surface of one of the concrete member.

Therefore, the bolt is guided along the groove wall to the lower groove simply by aligning the bolt with the opening of the guide groove and lowering the bolt with a crane or the like . Thereby, the other concrete member is installed on the one concrete member without causing a positional shift in the longitudinal direction.

According to a third aspect of the present invention, the bolt is a two-stage bolt, a joint bolt having a shaft portion fastened to the nut, and an attracting bolt fastened to a cylindrical nut at a head of the joint bolt. The cylindrical nut is guided into the lower groove along the groove wall of the upper groove, and the shaft portion of the drawing bolt is sequentially screwed into the cylindrical nut. It is drawn to the concrete member.

  Therefore, the joint bolt is guided along the groove wall of the upper groove to eliminate the longitudinal displacement, and the shaft portion of the drawing bolt is screwed to eliminate the displacement in the width direction of the other concrete member. The

  The invention described in claim 4 is characterized in that a buffer member for relaxing the tightening pressure of the drawing bolt is interposed between the inner peripheral edge of the lower groove and the head of the drawing bolt.

  As one mode of the buffer member, for example, a channel member having a U-shaped cross section is used, but any member may be used as long as the tightening pressure of the drawing bolt can be reduced. Moreover, since the bolt has a two-stage configuration, a normal bolt can be used as the drawing bolt, and it is not necessary to prepare a custom-made bolt.

  The invention described in claim 5 is characterized in that a reinforcing portion is erected at both end portions of the installation jig, and a pedestal for supporting the buffer member is provided between the reinforcing portions.

  The installation jig is reinforced by this reinforcing portion, and a buffer member is temporarily placed on the pedestal so that the drawing bolt can be fastened.

  According to the sixth aspect of the present invention, the fastening jig is fastened to the nut embedded in the side surface of one of the concrete members by fastening the shaft portion of the feed bolt via the other end of the fitting jig. The other concrete member is pushed back.

  Therefore, the joint bolt is guided along the groove wall of the upper groove to eliminate the longitudinal displacement, and the shaft portion of the feed bolt is fastened to the nut to eliminate the displacement in the width direction of the other concrete member. The

  The invention described in claim 7 is characterized in that a cushioning material is provided on the installation surface of either of the two concrete members.

  For example, a rubber material or the like is used as the cushioning material, and the impact during installation of both concrete members is reduced.

  In addition, as one aspect of the two concretes, a lower end portion of a connection bolt for connecting and joining the two concrete members is embedded in an installation surface of one concrete member, and the connection bolt is installed on the installation surface of the other concrete member. A type is used in which an insert device into which the upper end portion of the insert can be inserted is embedded.

  According to this type, since the working hole is formed in the side surface of one of the concrete members, a connection nut is fastened to the upper end portion of the connection bolt inserted through the insert device. Therefore, it is not necessary to connect using a PC steel rod, the work process is simplified, and workability is improved.

  According to invention of Claims 1-7, since the other concrete member can be installed in the exact position of one concrete member, it is not necessary to adjust a position using a bar after installation, and adjustment of an installation position is possible. It is simple and improves the construction efficiency of concrete products.

  In particular, according to the second aspect of the present invention, the other concrete member can be installed without causing any positional displacement in the longitudinal direction by simply lowering the crane with the bolt head aligned with the opening of the upper groove and the bolt head. Easy to work.

  According to the invention of claim 3.6, in addition to the positional deviation in the longitudinal direction of the other concrete member, the positional deviation in the width direction can be eliminated, and the other concrete member can be installed at a more accurate position.

  According to the fourth aspect of the present invention, since the tightening load of the drawing bolt is eased, an excessive load of the installation jig is prevented. Further, it is not necessary to use a custom bolt for the drawing bolt, and the cost is suppressed in this respect.

  According to the invention described in claim 5, since the necessary load is secured on the installation jig, the drawing work can be carried out without difficulty, and the work can be carried out by placing the buffer member on the pedestal. Easy to do.

  According to the seventh aspect of the invention, the impact during installation is mitigated, so that the installation surface is prevented from being damaged.

  1 to 11 show a concrete member installation structure according to an embodiment of the present invention. Here, the leg portion 8 (the other concrete member) of the upper wall block 2 is installed on the upper end portion of the side wall block 6 (one concrete member) of the box culvert 1 using the installation jig 16. Since this box culvert 1 is the same as that shown in the background art, it will be described using the same reference numerals.

1 to 11 show a state where the right leg 8 of the upper wall block 2 is installed on the upper end 6 of the side wall block 3 constituting the right side of each box culvert 1. The upper end 6 and the left leg 8 are also installed in the same structure.
(1) Side wall block 6 and leg 8
As shown in FIG. 1, the upper end portion 6 and the leg portion 8 of the side wall block 3 are each embedded with a bottomed cylindrical insert nut 20 facing each other on the outer side surface 19.15. Specifically, one insert nut 20 is embedded in the outer side surface 16 of the leg portion 8, while two insert nuts 20 are embedded in the upper end portion 6 of the side wall block 3 vertically.

  A shaft portion 23 of a feed bolt 22 for setting the installation jig 16 is fastened to the inner peripheral surface of the insert nut 20 of the side wall block 3. On the other hand, the shaft portion 25 of the joint bolt 24 is fastened to the insert nut 20 of the leg portion 8.

A cylindrical nut 29 protruding from the outer side surface 19 of the leg 8 is integrally formed at the head of the joint bolt 24. A shaft portion 28 of an attracting bolt 17 that draws the leg portion 8 toward the upper end portion 6 of the side wall block is fastened to a female screw of the cylindrical nut 29 via a channel member (buffer member) 18. In this sense, the joint bolt 24 and the drawing bolt 17 are formed in a two-stage bolt shape.
(2) Installation jig 16
As shown in FIG. 1, the installation jig 16 is disposed over the outer surface of the leg portion 8 and the outer surface of the upper end portion 6 of the side wall block 3. Specifically, as shown in FIGS. 2 (a) to 2 (c), the installation jig 16 is erected on a rectangular guide plate 30 and on both side ends of the guide plate 30. Reinforcing portion 37, reinforcing plate 45 welded to the back surface of guide plate 30, grip 38 attached to the outer surface of each reinforcing portion 37, and bolt insertion formed at the center of guide plate 30 A through hole 31, a pedestal 39 that is welded between the reinforcing portions 37 to support the channel member 18, and a notch groove 32 that is formed in a hemispherical shape at one end 21 on the side wall block 2 side of the guide plate 30. And a guide groove 33 that is formed in the other end portion 27 of the guide plate 30 on the leg portion 8 side and guides and guides the cylindrical nut 29.

  As shown in FIGS. 2A and 2B, the guide groove 33 has a lower groove 34 for positioning the cylindrical nut 29 and an upper groove 35 for feeding the cylindrical nut 29. Both 34.35 are formed continuously up and down.

  Of these, as shown in FIG. 1.2, the lower groove 34 is set to have a groove width slightly larger than the outer diameter of the cylindrical nut 29, and the groove wall extends once from the groove bottom toward the upper groove. Inclined at an angle of ~ 5 degrees.

  The lower groove 34, the through hole 31, and the notch groove 32 are formed on the same line (positioning line). The shaft portion 23 of the feed bolt 22 is inserted into the through hole 31 and the notch groove 32, respectively. The shaft portion 23 is fastened to the insert nut 20, and the guide plate 30 is set on the outer surface 15 of the upper end portion 6 of the side wall block 2.

  On the other hand, the groove width of the upper groove 35 is gradually expanded from the lower groove 34 toward the opening 27, and the groove wall 36 of the upper groove 35 is inclined at an angle of about 3 to 10 degrees. . Thereby, the groove wall 36 functions as a slide surface for guiding the cylindrical nut 29 toward the lower groove 37 as shown in FIG.

  Therefore, when the leg portion 8 is installed on the upper end portion 6 of the side wall block 3, the cylindrical nut 29 slides along the groove wall 36 of the upper groove 35 as shown in FIG. It is guided and guided into the lower groove 34.

As shown in FIG. 2A, the grip 38 is formed in a U shape, and both end portions are welded to the outer surface of each reinforcing portion 37. Further, the pedestal 39 is formed in an L-shaped cross section as shown in FIG. 3, and one end thereof is welded to the upper surface of the guide plate 30 as shown in FIG. The height of the part is set equal to that of the reinforcing part 37.
(3) Channel member 18 and drawing bolt 17
As shown in FIGS. 4A to 4C, the channel member 18 is formed in a U-shaped cross section, and has a rectangular upper plate 40 and a leg plate 41 erected on the side end of the upper plate 40. As shown in FIG. 1, the cylindrical nut 29 is accommodated therein.

  Specifically, an insertion hole 43 through which the shaft portion 28 of the drawing bolt 17 is inserted is formed at the center of the upper plate 40, while the both leg plates 41 are formed at the inner peripheral edge of the lower groove 34. It is placed on top.

  As shown in FIG. 1, the shaft portion 28 of the drawing bolt 17 is inserted into the insertion hole 43 and fastened to the inner peripheral surface of the cylindrical nut 29. Therefore, by rotating the head portion 44 of the drawing bolt 17, the shaft portion 28 of the bolt 17 is sequentially screwed into the inner periphery of the cylindrical nut 29 as shown in FIGS. is doing. As a result, the cylindrical nut 29 is drawn toward the head 44 of the bolt 17.

In addition, since the bolt has a two-stage configuration, the length of the shaft portion 28 of the drawing bolt 17 is complemented by the joint bolt 24, and a normal bolt can be used for the drawing bolt 17, and it is not necessary to prepare a custom-made bolt. Is suppressed.
(3) Installation work of both blocks 2.3 Therefore, when installing the leg portion 8 of the upper wall block 2 on the upper end portion 15 of the side wall block 3, first, it was divided and manufactured at the construction site as in the past. The both side wall blocks 3 are installed at a predetermined interval, and the bottom wall block 4 is placed between the lower ends of the both side wall blocks 3. After the concrete placement, the upper wall block 2 is lifted by the crane 5 and hung near the upper end portion 6 of the side wall block 3.

  Next, the shaft 23 of the joint bolt 24 is fastened to the insert nut 20 of the leg 8, while the feed nut 22 is fed to the insert nut 20 of the side wall block 3 while aligning the cylindrical nut 29 with the position of the opening of the upper groove 35. 6 are screwed together, and the installation jig 16 is set on the outer surface 15 of the side wall block 3 as shown in FIG.

  Since the groove diameter of the upper groove 35 is expanded toward the opening, positioning is easy and workability is good. Moreover, since the grip 38 is attached to the installation jig 16, it is easy to attach it to the side wall block 3.

  At this time, as shown in FIG. 6A, there is often a positional shift in the direction of arrow P (construction direction / longitudinal direction) between both blocks 2.3, but the upper wall block 2 is suspended. The cylindrical nut 29 is guided and guided along the groove wall 36 of the upper groove 35 while the cylindrical nut 29 enters the lower groove 34 as shown in FIG. Directional misalignment is automatically resolved.

  Therefore, the positional deviation of the leg portion 8 in the direction of the arrow P can be easily eliminated by simply hanging the upper wall block 3 with the crane 5 without having to be corrected using the bar 10 as in the prior art.

  As a result, the installation surface 6a. The position shift in the direction of the arrow P can be corrected accurately without damaging 8a. In this respect, the work process is simplified and the construction cost is also suppressed.

  Further, when there is a positional deviation in the width direction between both blocks 2.3, the crane 5 is stopped and the correction work is performed. That is, when there is a positional shift in the direction of arrow Q in FIG. 7 between both blocks 6.8, the shaft portion 23 of the feed bolt 22 is fastened to the insert nut 20. As a result, the leg portion 8 is pushed back to the guide plate 30 as shown in FIG. 7B, and the positional deviation in the arrow P direction is eliminated. (In FIGS. 7-11, the grip 38, the base 39, and the reinforcement board 45 are abbreviate | omitted).

  On the other hand, when the upper wall block 2 is lifted by the crane 5, as shown in FIG. 8, the upper wall block 2 bends inward, so that the arrow R in FIG. In many cases, displacement in the direction (width direction) occurs.

  In this case, as shown in FIGS. 10A and 10B, both leg plates 41 of the channel member 18 are brought into contact with the inner peripheral edge of the lower groove 34, and the shaft portion 28 of the pulling bolt 17 is inserted into the insertion hole of the upper plate 40. 43 is inserted.

  When the head portion 44 of the drawing bolt 17 is rotated, the shaft portion 28 is sequentially screwed into the inner peripheral surface of the cylindrical nut 29, so that the joint bolt 24 is pulled in the direction of the head portion 44 of the drawing bolt 17. Following this, the leg portion 8 of the upper wall block 2 opens, and the positional deviation in the arrow R direction is eliminated as shown in FIGS. 11 (a) and 11 (b). Therefore, the positional deviation in the arrow Q direction can be eliminated without increasing the thickness of the upper wall block 2 or the number of reinforcing bars, and the manufacturing cost is reduced.

  Since the tightening load of the head 44 of the drawing bolt 17 is buffered by the channel member 18, an excessive load on the guide plate 30 is prevented. Since the guide plate 30 is reinforced by the reinforcing portion 37 and the reinforcing plate 45, the required strength is ensured and the safety is not hindered.

  The arrow P.P. Q. After eliminating the displacement in the R direction, the leg portion 8 is suspended until it is joined to the upper end portion 6 of the side wall block 3, whereby the cylindrical nut 26 is guided to the groove wall of the lower groove 34, and the leg of the upper wall block 2 is The part 8 is installed at the exact position of the upper end 6 of the side wall block 3.

Accordingly, the leg portion 8 of the upper wall block 2 can be easily and accurately installed on the upper end portion 6 of the side wall block 3 without requiring a skilled worker, and in this respect, a highly accurate box culvert 1 can be constructed.
(2) Aspect of connection FIG. 12 shows a connected state of the concrete member after installation. Here, after installing the leg portion 8 of the upper wall block 2 on the upper end portion 6 of the side wall block 3, the bolts 17. Feed bolt 22. The joint bolts are loosened to remove the guide plate 30 from the outer side surface 15.19 of both 6.8, and the both 6.8 are connected vertically by the connecting member 60.

  FIG. 12 also shows a state in which the right leg 8 of the upper wall block 2 is connected to the upper end 6 of the side wall block 3 constituting the right side of each box culvert 1, but the upper end 6 on the left side is shown. The left leg 8 is also connected with the same structure.

  As shown in FIGS. 12 (a) and 12 (b), the connecting member 60 includes a connecting bolt 50 having male screws formed at the upper and lower ends, an insert device 51 through which the upper end of the connecting bolt 50 is inserted, The main part is a connection nut 59 fastened to the upper end of the connection bolt 50.

  As shown in FIG. 12 (a), the insert instrument 51 is formed in a convex shape in the longitudinal section, and an insertion hole 55 through which the upper end portion 52 of the connecting bolt 50 is inserted in the vertical direction is formed in the center portion. On the other hand, insertion holes 57 through which the reinforcing bars 56 in the leg portions 8 are inserted are formed in both end portions in the vertical direction, and are embedded in a plurality of locations in the longitudinal direction of the mounting surface 8 a of the leg portions 8.

  The connecting bolt 50 is formed in a size in which the outer diameters of the upper and lower end portions 52.53 are different, and the lower end portion 53 is embedded at a position corresponding to the insert device 51 on the installation surface 6a of the side wall block 3. On the other hand, the outer diameter of the upper end portion 52 is set smaller than the inner diameter of the insertion hole 57.

  The lower end 53 of the connecting bolt 50 is fastened to the internal thread of the insert nut 54 of the upper end 52 of the side wall block 3, while the upper end 52 protrudes from the end surface of the upper end 52. ing.

  A connecting nut 59 is fastened to the upper end 52 of the connecting bolt 50 in a connecting work hole 58 formed in the outer side surface 19 of the leg 8. A plurality of connection work holes 58 are formed corresponding to the respective insert instruments 51, and the insert nuts 20 are embedded between the connection work holes 58.

  Therefore, the upper end portion 52 of each connection bolt 50 is guided to the insertion hole 55 of each insert tool 51, and the connection nut 59 is fastened in each connection operation hole 58, and the leg portion 8 of the upper wall block 2 is connected. The upper end portion 6 of the side wall block 3 is connected. In this sense, both the role of the guide pin 7 and the guide pin hole 9 and the connecting role of both 8.9 are shared.

Thus, the connecting operation of both 8.9 can be performed without using the guide pin 7 and the guide pin hole 9, thereby simplifying the operation process. At this time, since the outer diameter of the upper end portion 52 of the connecting bolt 50 is set smaller than the inner diameter of the insertion hole 55, positioning is easy and workability is improved.
(3) Others The present invention is not limited to the above embodiment. For example, a cushioning material such as a rubber material may be provided on the upper end surface 6a of the both side wall blocks. In this case, the impact when the legs 8 are installed is alleviated, and both sides 6a. Damage to 8a is prevented. Further, after the leg portion 8 is connected to the upper end portion 6 of the side wall block 3, the load on the leg portion 8 is relieved. Damage to 8a is prevented.

  In addition to the joint box culvert 1, the present invention can also be used for installation of other concrete products such as an L-shaped retaining wall block.

The longitudinal cross-sectional view which shows the installation structure of embodiment of this invention. (A) is a front view of an installation jig, (b) is a plan view of the installation jig, and (c) is a cross-sectional view taken along line AA of (a). (A) is a side view of a pedestal, (b) is a rear view of the pedestal, and (c) is a bottom view of the pedestal. (A) is a top view of a channel member, (b) is a bottom view of a channel member, (c) is a side view of a channel member. (A) is a cross-sectional view before the shaft portion of the drawing bolt is screwed into the cylindrical nut, and (b) is a cross-sectional view after the shaft portion of the drawing bolt is screwed into the cylindrical nut. (A) is a side view which shows the state which fitted the cylindrical nut to the opening part of the guide groove, (b) is a side view which shows the state which suspended the leg part. The longitudinal cross-sectional view which shows the state which the position shift of the width direction (arrow Q direction) produced. (A) is a front view before lifting an upper wall block with a crane, (b) is a front view which shows the state which the upper wall block bent. (A) is a side view which shows the state which the position shift of the width direction (arrow R direction) produced, (b) is the BB sectional drawing of (a). (A) is a side view which shows the state which applied the channel member and screwed the drawing bolt in the cylindrical nut, (b) is CC sectional view taken on the line of (a). (A) is a side view which shows the state after drawing of a leg part, (b) is the DD sectional view taken on the line of (a). (A) is a longitudinal cross-sectional view which shows the connection state of a concrete member, (b) is a top view of a connection member. The perspective view of a box culvert. The perspective view which shows the state which suspended the upper wall block with the crane. The enlarged view of the junction part of an upper wall block and a side wall block. The side view which shows the state which adjusts an installation position using a bar.

Explanation of symbols

1 ... Box culvert 2 ... Upper wall block (one concrete product)
3. Side wall block (the other concrete product)
16 ... Installation jig 17 ... Drawing bolt 18 ... Channel member (buffer member)
20 ... Nut 21 ... One end of the guide plate (one end of the installation jig)
22 ... Feed bolt 23 ... Feed bolt shaft 24 ... Joint bolt 25 ... Joint bolt shaft 27 ... Other end of the guide plate (the other end of the installation jig)
28 ... Shaft part of the drawing bolt 29 ... Cylindrical nut 33 ... Guide groove 34 ... Lower groove 35 ... Upper groove 36 ... Groove wall of upper groove 37 ... Reinforcement part 39 ... Base

Claims (7)

When constructing a concrete product that has been divided and manufactured at a construction site, it is a concrete member installation structure in which the other concrete member is installed on one concrete member,
In the installation jig installed on the side surface of one of the concrete members, a guide groove for guiding the feeding member on the side surface of the other concrete member is provided,
The guide groove opens upward, and includes a lower groove on the groove bottom side and an upper groove whose groove width extends from the lower groove toward the opening,
When the other concrete member is lowered toward the one concrete member, the feeding member is guided from the upper groove to the lower groove along the groove wall of the guide groove,
An installation structure for a concrete member, wherein the other concrete member is installed on one concrete member . The feed member is installed structural concrete member according to claim 1, wherein the fastening to a benzalkonium the shaft portion of the bolt on one of the nut embedded in the side surface of the concrete member. The bolt is a two-stage bolt, and includes a joint bolt with a shaft portion fastened to the nut, and a pulling bolt fastened to a cylindrical nut at the head of the joint bolt,
The cylindrical nut is guided into the lower groove along the groove wall of the upper groove, and the shaft portion of the drawing bolt is sequentially screwed into the cylindrical nut.
3. The concrete member installation structure according to claim 2, wherein the other concrete member is attracted to the one concrete member.   4. The concrete member installation structure according to claim 3, wherein a buffer member for relaxing a tightening pressure of the drawing bolt is interposed between an inner peripheral edge of the lower groove and a head of the drawing bolt. .   5. The concrete member installation structure according to claim 4, wherein a reinforcing portion is erected at both end portions of the installation jig, and a pedestal for supporting the buffer member is provided between the reinforcement portions. By fastening the shaft portion of the feed bolt to the nut embedded in the side surface of one of the concrete members via the other end portion of the installation jig,
6. The concrete member installation structure according to any one of claims 2 to 5, wherein the installation jig pushes back the other concrete member.   The concrete member installation structure according to any one of claims 1 to 6, wherein a cushioning material is provided on any installation surface of the both concrete members.

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