JP4440620B2 - Column pile connection structure - Google Patents

Description

  The present invention relates to a column pile joint structure. More specifically, the present invention relates to a column pile joint structure in which the columns can be joined without any trouble even if the pile position is shifted.

  Conventionally, in a steel structure column base, a column pile joint structure in which a column and a pile are joined to each other by bolts and nuts is used as a joining method in which a foundation beam is omitted.

  In this joint structure, since the position of the pile generally shifts, various column pile joint structures for joining the columns while absorbing the shift have been proposed.

  In the first example, as shown in FIG. 4, a pile insertion hole 102 is machined in a pile side plate 101 that is bolted to a base plate of a column so that the pile 100 is displaced, and then the pile insertion hole 102 is processed. The pile 100 and the pile side plate 101 are welded and joined by inserting the upper end of the pile 100 into the pile.

  In the second example, as shown in FIG. 5, the pile side plate 111 is welded and joined to the column center regardless of the displacement of the pile 110.

  The 3rd example provides the loose hole 122 in the pile side plate 121 as shown in FIG.

  In the fourth example, as shown in FIG. 7, a pile 141 is provided on the pile 140 and a pile insertion hole 143 capable of absorbing the displacement of the pile 140 is provided on the pile side plate 142. After being placed on the rod 141 and positioned, the gap between the pile insertion hole 143 and the pile 140 is filled by welding.

  In the fifth example, as shown in FIG. 8, a short pipe 152 of a size capable of absorbing the displacement of the pile 150 is provided on the lower surface of the pile side plate 151, and the short pipe 152 is inserted into the upper end of the pile 150. Later, the pile side plate 151 is positioned, and then the pile 150 is filled with concrete and the short pipe 152 is fixed.

  However, the conventional example has the following problems.

  In the first example, since it is necessary to drill the pile insertion hole 102 in the pile side plate 101 after accurately measuring the misalignment amount of the pile 100, there is a problem that the construction is not quick.

  In the second example, there is a problem that welding between the upper end of the pile 110 and the lower surface of the pile side plate 111 is upward welding, and workability is poor.

  In the third example, in order to absorb the misalignment amount of the pile 120, it is necessary to provide a large loose hole 122. Therefore, there is a problem that the size of the pile side plate 121 increases correspondingly and is not economical.

  In the fourth example, since it is necessary to provide a large insertion hole in order to absorb the misalignment amount of the pile 140, the size of the pile side plate 142 is increased accordingly, which causes an increase in cost. . Moreover, since considerable welding overlay work is needed, there exists a problem that workability is bad.

  In the fifth example, since the structure of the pile 150 is complicated, there is a problem that the cost is increased. In addition, since concrete must be filled from the gap between the pile side plate 151 and the upper end of the pile 150, there is a problem that workability is poor and the construction period is prolonged.

  This invention is made in view of the subject of this prior art, Comprising: Even if the shift | offset | difference arises in the position of a pile, it aims at providing the pillar pile joining structure which can perform joining of a pillar without trouble.

The column pile joint structure of the present invention is a column pile joint structure that joins a column and a pile by bolt joining, and includes a joining member that joins a column and a pile,
The joining member includes a joining member side plate joined to a base plate of a column, a connecting short pipe whose upper end is joined to the lower surface of the joining member side plate, and a lower part joined to the inner surface of the lower end of the connecting short pipe A backing plate to be inserted into the upper end portion, and a ring-shaped plate to be inserted into the connecting short pipe,
The joint member side plate has a bolt insertion hole, the pitch circle of which is the same as the pitch circle of the bolt insertion hole of the base plate, and the hole diameter is allowed to be a normal bolt insertion hole diameter displacement. The ring plate has a bolt insertion hole and a connection short pipe insertion hole, the pitch circle of the bolt insertion hole is the same as the pitch circle of the bolt insertion hole of the base plate, and The connecting short pipe insertion hole is configured not to cause a hindrance to bolt insertion from the bolt insertion hole.

The column pile joint structure of the present invention is characterized in that the center of the connecting short pipe is decentered by a predetermined amount from the centers of the plurality of bolt insertion holes provided radially on the ring-shaped plate .

  Since the pillar-pile joint structure of the present invention is configured as described above, an excellent effect is obtained that the pile and the pillar can be joined as long as the position of the pile is within an allowable range.

  Hereinafter, although the present invention is explained based on an embodiment, referring to an accompanying drawing, the present invention is not limited only to this embodiment.

  A column pile joint structure according to an embodiment of the present invention is shown in a sectional view in FIG.

  As shown in FIG. 1, the pillar pile joint structure K is formed by joining the pillar 10 and the pile 20 via the joint member 30. In the following description, it is assumed that the pillar 10 is a 300 mm square pipe and the pile 20 is a 270 mm round pipe.

  The column 10 includes a base plate 12 joined to the lower end of the square pipe 11 as shown in FIG. The base plate 12 is a disc and is joined with its center aligned with the axis of the square pipe 11. A required number (12 in the illustrated example) of bolt insertion holes 12a are provided on the outer circumference of the base plate 12 at equal intervals on the same circumference.

  Here, the base plate 12 is, for example, 600 mm round, and the diameter of the pitch circle of the bolt holes is, for example, 460 mm. The hole diameter of the bolt insertion hole 12a is the same as that of a normal bolt hole. For example, if the bolt is M24, the diameter of the bolt insertion hole is 26 mm.

  The joining member 30 includes a joining member side plate 31 whose upper surface is in contact with the base plate 12 of the column 10, a connecting short pipe 32 joined to the center of the lower surface of the joining member side plate 31, and an inner bottom end of the connecting short pipe 32. The backing plate 33 has a lower portion protruding and joined, and a ring-shaped plate 34 that comes into contact with the outer periphery of the lower surface of the joining member side plate 31.

  2B, the joining member side plate 31 is a disk having the same diameter as the base plate 12 of the column 10, and a bolt insertion hole 31a corresponding to the bolt insertion hole 12a of the base plate 12 is provided. Is provided. Here, the hole diameter of the bolt insertion hole 31a is obtained by adding an allowable value of the displacement amount of the pile 20 to the normal bolt hole diameter. For example, if the normal bolt hole diameter is 26 mm and the allowable displacement amount of the pile 20 is 50 mm, the hole diameter of the bolt insertion hole 31a is 76 mm.

  The connection short pipe 32 is a round pipe of the same size as the pile 20, and as shown in FIG. 2B, its axis is half the allowable value of the deviation amount of the pile 20 from the center of the joining member side plate 31 (for example, If the allowable value of the displacement amount of the pile 20 is 50 mm, the allowable value is 25 mm. In addition, the diameter of the pitch circle of the bolt insertion hole 31 a is set so that the bolt insertion hole 31 a does not interfere with the connection short pipe 32.

  The backing plate 33 is formed by integrating the joining member 30 and the pile 20 by welding and joining with the lower portion protruding from the connecting short pipe 32 being inserted into the upper end portion of the pile 20. The backing plate 33 adjusts the level of the joining member side plate 31 by adjusting the insertion depth to the upper end of the lower pile 20.

  As shown in FIG. 2 (c), the ring-shaped plate 34 is provided with a connection short tube insertion hole 34 a through which the connection short tube 32 is inserted at the center of a disk having the same diameter as the joining member side plate 31. The bolt insertion hole 34b is provided on the outer peripheral portion.

  The connection short pipe insertion hole 34a has a center shifted from the center of the ring-shaped plate 34 by half the allowable value of the displacement amount of the pile 20 (for example, 25 mm if the allowable value of the displacement amount of the pile 20 is 50 mm). It is a circular through-hole at a certain position. The hole diameter does not hit the pile 20 that has been misaligned, and is blocked so that the bolt insertion hole 31a of the joining member side plate 31 is not a portion other than the bolt insertion portion. For example, if the pile 20 is 270 mm round and the hole diameter of the bolt insertion hole 31 a of the joining member side plate 31 is 76 mm, the hole diameter of the connection short pipe insertion hole 34 a is, for example, 360 mm. The position and the hole diameter of the connection short tube insertion hole 34a are not limited to the above, and the ring plate 34 can be inserted into the connection short tube 32, and the bolt insertion from the bolt insertion hole 34b can be performed. It may be appropriately adjusted within a possible range.

  By making the position and the hole diameter of the connecting short pipe insertion hole 34a in this way, as shown in FIG. 3, if the displacement of the pile 20 is within an allowable range, the base plate 12 of the column 10 is not subjected to any special treatment. And the joining member side plate 31 can be joined by bolts. 3A shows a case where the misalignment amount of the pile 20 is zero, FIG. 3B shows a case where the misalignment amount of the pile 20 is 1/4 of the allowable value, and FIG. Shows the case where the misalignment amount of the pile 20 is ½ of the allowable value, and FIG. 3D shows the case where the misalignment amount of the pile 20 is within the allowable value limit.

  Next, construction of the column pile joint structure K having such a configuration will be described.

  Procedure 1: The connecting member 30 is mounted on the pile 20 in a state where the ring-shaped plate 34 is inserted into the connecting short pipe 32. That is, the lower part of the backing plate 33 is inserted into the upper end of the pile 20.

  Procedure 2: After adjusting the level of the connection member side plate 31, the connection member 30 is joined to the pile 20. That is, the lower part of the backing plate 33 and the upper end of the pile 20 are welded.

  Procedure 3: The base plate 12 of the column 10 is placed on the connecting member side plate 31 and positioned.

  Procedure 4: A bolt is inserted into the base plate 12 of the column 10 from the ring-shaped plate 34 side through the connecting member side plate 31. Since the hole diameter of the bolt insertion hole 31a of the connection member side plate 31 and the hole diameter of the connection short pipe insertion hole 34a of the ring-shaped plate 34 are set as described above, the bolt can be inserted without any special treatment. .

  Procedure 5: A nut is screwed into a portion of the bolt protruding from the upper surface of the base plate 12, and the base plate 12 and the connection member side plate 31 are bolted. Thereby, the joining member 30 and the column 10 are joined. That is, the column 10 and the pile 20 are joined via the joining member 30.

  Thus, according to the pillar pile joint structure K of the present embodiment, the ring-shaped plate 34 provided with the hole diameter of the bolt insertion hole 31a of the connection member side plate 31 being increased and the connection short pipe insertion hole 34a being eccentric. With a simple configuration of using, the pile 20 and the column 10 within an allowable range can be joined.

  As mentioned above, although this invention has been demonstrated based on embodiment, this invention is not limited only to this embodiment, A various change is possible. For example, in this embodiment, the pillar 10 is a 300 mm square and the pile 20 is a 270 mm round, but the application of the present invention is not limited to the above-mentioned size, and the pillar 10 and the pile 20 of various sizes. Applicable to combinations.

  The present invention can be applied to the connection between a pillar and a pile, in which the displacement of the pile is allowed.

It is sectional drawing of the column pile joining structure which concerns on one Embodiment of this invention. It is a top view which isolate | separates and shows each part of the pillar pile | joint structure which concerns on the same embodiment, Comprising: The same (a) shows the thing of a pillar, The same (b) shows the thing of a pile side plate, The same (c) The ring-shaped plate is shown. It is explanatory drawing that a ring-shaped plate does not interfere with the bolt insertion hole of a pile and a pile side plate, Comprising: (a) shows the case where the amount of center misalignment of a pile is zero, (b) shows the center misalignment of a pile (C) shows the case where the misalignment amount of the pile is 1/2 of the allowable value, and (d) shows the case where the misalignment amount of the pile is the allowable value limit. Show the case. It is a 2nd page figure of the pile in the 1st example of the conventional example of a pillar pile joining structure, and (a) shows a top view and (b) shows a sectional view. Sectional drawing of the pile in the 2nd example of the prior art example of a column pile joining structure is shown. Sectional drawing of the 3rd example of the prior art example of a column pile joining structure is shown. It is a 2nd page figure of the pile in the 4th example of the conventional example of a pillar pile joining structure, the same (a) shows a top view and the same (b) shows a sectional view. Sectional drawing of the 5th example of the prior art example of a column pile joining structure is shown.

Explanation of symbols

K pillar pile joint structure 10 pillar 11 square pipe 12 base plate 20 pile 30 joining member 31 joining material side plate 32 connecting short pipe 33 backing plate 34 ring-shaped plate

Claims (2)

It is a column pile joint structure that joins a column and a pile by bolt joint,
It has a joining member that joins the pillar and the pile,
The joining member includes a joining member side plate joined to the base plate of the column, a connecting short pipe whose upper end is joined to the lower surface of the joining member side plate, and a lower part joined to the inner surface of the lower end of the connecting short pipe and the lower part of the pile A backing plate to be inserted into the upper end portion, and a ring-shaped plate to be inserted into the connecting short pipe,
The joint member side plate has a bolt insertion hole, the pitch circle of which is the same as the pitch circle of the bolt insertion hole of the base plate, and the hole diameter is allowed to be a normal bolt insertion hole diameter displacement. It is the size that added the value,
The ring-shaped plate has a bolt insertion hole and a connection short pipe insertion hole, a pitch circle of the bolt insertion hole is the same as a pitch circle of the bolt insertion hole of the base plate, and the connection short pipe insertion hole is the A pillar pile joint structure characterized in that the bolt insertion from the bolt insertion hole is not hindered. The column pile joint structure according to claim 1 , wherein the center of the connecting short pipe insertion hole is eccentric by a predetermined amount from the center of the plurality of bolt insertion holes provided radially on the ring-shaped plate .

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