JP6210759B2 - Pile beam joint structure and pile beam joint method - Google Patents

Description

  The present invention relates to a pile beam joint structure and a pile beam joint method.

Conventionally, in steel-framed buildings, after the construction of the piles, concrete is placed on-site to construct footings and foundation beams, and the pillars and beams of the buildings are connected via the footings and foundation beams that swallow the pile heads. He was joining piles. For this reason, many processes, such as formwork for constructing footings and foundation beams, rebar construction, and concrete curing, are required, and the construction period takes a long time.
Against this background, there has been a demand for the development of a technique for directly joining piles and building columns and beams that can be shortened.
For example, Patent Literature 1 discloses a technique for directly joining a pile and a pillar of a building.

Patent Document 1 projects the head of a steel pile placed on the ground for a predetermined length from the ground surface, and inserts the head of the steel pile into a pile head insertion hole formed in the pile-side base plate, The outer peripheral surface of the steel pile and the pile side base plate are joined. In addition, a through hole (bolt hole) is provided around the pile side base plate, and a pile head cap with an adjustment bolt protruding is inserted inside the steel pile, and the inside of the pile head cap and the steel pile is inserted. The peripheral surfaces are joined.
Furthermore, the column side base plate is joined to the lower end surface of the column, and the column side base plate is mounted on the adjustment bolt, and the column side base plate is anchored to the column side base plate according to the position of the through hole provided in the pile side base plate. A hole (bolt hole) is drilled so that the anchor hole and the through hole are aligned with each other. In this state, a temporary bolt is inserted into the anchor hole and the through hole, and a sandwiching plate is inserted between the pile side base plate and the column side base plate to position the column. After that, insert a pinching plate with a notch between the through hole and the anchor hole, insert a temporary bolt in the notch, and prevent the column base plate from wobbling with the number of pinching plates. adjust. After adjusting the column height, replace the temporary bolt with a high strength bolt.

Japanese Patent No. 3095376

However, in Patent Document 1, the anchor holes of the column-side base plate are positioned at the construction site, and anchor holes are drilled at the four corners of the column-side base plate. Furthermore, a temporary bolt is inserted between the pile side base plate and the column side base plate, the position and height of the column are adjusted while changing the number of the sandwich plates and the sandwich plate, and after the adjustment, the temporary bolt is replaced with a high strength bolt. For this reason, there are many work processes at the construction site, and shortening of the construction period cannot be expected.
In view of the above facts, an object of the present invention is to provide a pile beam joint structure that reduces the number of work steps at a construction site.

In the pile-beam joint structure according to the invention of claim 1, the steel pile and the head of the steel pile are inserted into the hole for the pile head formed in the center, and the outer peripheral surface of the steel pile, A lower plate to be joined, a lower bolt hole formed around the lower plate, a beam supported by the steel pile, a center line on the central axis of the beam, and a bottom surface of the beam Formed around the upper plate based on the position of the lower bolt hole of the lower plate bonded to the outer surface of the bonded upper plate and the steel pile, when the beam is installed at a set position, An upper bolt hole whose hole center coincides with the lower bolt hole of the lower plate, a base plate that is inserted into the head of the steel pile and joined to an inner peripheral surface of the steel pile, and the base plate An adjustment bolt that is in contact with the lower surface of the upper plate and adjusts the height of the beam; and A bolt that is inserted into the bolt hole and the upper bolt hole and that joins the upper plate and the lower plate with the adjustment bolt interposed therebetween, and a filler filled between the upper plate and the lower plate. It is characterized by that.

According to the invention described in claim 1, the lower plate joined to the head of the steel pile and the upper plate joined to the bottom surface of the beam are arranged to face each other with the adjustment bolt interposed therebetween, The upper plate and the lower plate are joined by the joining bolt inserted through the upper bolt hole. At this time, the upper bolt hole of the upper plate is processed so that the lower bolt hole of the lower plate matches the hole center when the beam is installed at the set position with the upper plate joined to the bottom surface of the beam. Yes.
For example, the pile position of the steel pile is measured in advance, and the upper bolt hole is processed by matching the lower bolt hole and the hole center based on the measurement result. Thereby, it can process, without aligning an upper volt | bolt hole on-site. As a result, the work process at the construction site can be reduced. In addition, the position of the upper bolt hole in the upper plate should be adjusted only by adjusting the position of the upper bolt hole without affecting the construction error of each steel pile, and the steel pile and beam should be joined. Can do.

The invention according to claim 2 is the pile-beam joint structure according to claim 1, wherein the beam is formed by joining the upper plate to the bottom surface of the beam and processing the upper bolt hole on the upper plate. It is characterized by being transported to the construction site after finishing.
As a result, the beam and upper plate can be joined and the upper bolt hole can be machined into the upper plate in an environment where the environment is good, improving the welding quality of the upper plate and the position accuracy of the upper bolt hole. Can do. As a result, the work process at the construction site can be reduced, and the construction period can be shortened.

  In the steel pile beam joining method according to the invention described in claim 3, the steel pile head is inserted into a pile head hole formed in a lower plate provided with a lower bolt hole around the steel pile beam. The step of joining the outer peripheral surface of the pile, the step of matching the center line on the central axis of the beam supported by the steel pile and joining the upper plate to the bottom surface of the beam, and installing the beam at the set position A step of forming an upper bolt hole whose hole center coincides with a lower bolt hole of the lower plate around the upper plate, and a base plate is inserted into the head of the steel pile, and the steel pile Joining the inner peripheral surface of the base plate, providing the base plate with an adjusting bolt that contacts the lower surface of the upper plate and adjusting the height of the beam, and joining the lower bolt hole and the upper bolt hole Insert the bolt, and join the upper plate and the lower plate with the adjustment bolt in between And degree, is characterized by having the steps of filling a filler between the upper plate and the lower plate.

According to the construction method of claim 3, when the upper bolt hole is machined into the upper plate and the upper plate is joined to the beam and the beam is installed at a set position, It is processed to the position where the hearts coincide. For example, the pile position of the steel pile is measured in advance, and the upper bolt hole is processed by matching the lower bolt hole and the hole center based on the measurement result. Accordingly, the positions of the upper and lower bolt holes can be matched even if the upper bolt holes are not processed on site, so that the work process at the construction site can be reduced.
As a result, the work process at the construction site can be reduced and the construction period can be shortened.

  Since this invention is set as the said structure, it can provide the pile beam joining structure which reduced the work process in the construction site.

(A) is a vertical sectional view of a building showing an application example of a pile beam joint structure according to an embodiment of the present invention, and (B) is an enlarged perspective view of the pile beam joint portion. It is a disassembled perspective view of the pile beam junction part of the pile beam junction structure which concerns on embodiment of this invention. (A) is a top view (XX sectional view of (B)) of a pile beam junction part of a pile beam junction structure concerning an embodiment of the present invention, and (B) is the side view. (A) is a top view of the state which joined the upper plate to the beam of the pile beam junction part of the pile beam junction structure which concerns on embodiment of this invention, (B) is the state which opened the upper volt | bolt hole in the upper plate FIG.

(First embodiment)
The pile beam joining structure which concerns on 1st Embodiment of this invention is demonstrated using FIGS. 1-4.
As shown in the side view of FIG. 1 (A), the pile beam joint structure is a joint structure in the pile beam joint portion 10 of the foundation beam 20 of the building 40 and the support pile 12 that supports the building 40. As shown in the perspective view of the pile beam joint 10 in FIG. 1 (B), the support pile (steel pipe pile) 12 and the foundation beam (steel beam) 20 are made by placing concrete on the ground surface 42 to provide footing or foundation. It is not the structure which construct | assembles and joins a beam but the structure which joins in the predetermined position (height H) from the ground surface 42 using the lower plate 14 and the upper plate 24. FIG.
Here, the building 40 has a configuration in which one end of the steel beam 20 and the lower end of the steel column 44 are welded and joined, and the roof 46 and the wall 48 are cantilevered by the steel column 44. After construction of the pile beam joint 10, interior construction of the building 40 is performed and the building 40 is completed. The steel pipe pile 12 is built in the ground 56, and the head protruding from the ground 56 is joined to the steel beam 20.

As shown in the exploded perspective view of FIG. 2, the plan view of FIG. 3A, and the side view of FIG. 3B, the pile beam joint 10 has a steel pipe pile 12, The lower plate 14 is joined. Here, the steel pipe pile 12 is preferably a bladed pile (for example, trade name EAZET pile of Asahi Kasei Construction Materials Co., Ltd.) with a blade provided at the tip built into the ground 56 to enhance the supporting force. Thereby, even if the building 40 is built in a narrow area, it is possible to avoid interference with existing piping and the like.
The lower plate 14 is formed of a steel plate in a rectangular shape, and a pile head hole 16 into which the head of the steel pipe pile 12 is inserted is formed in the center. Further, lower bolt holes 18 are formed at four locations around the lower plate 14. A pile head hole 16 of the lower plate 14 is inserted into the head 12H of the steel pipe pile 12, and the outer peripheral surface of the steel pipe pile 12 and the pile head hole 16 are welded. Thereby, the load from the building 40 applied to the lower plate 14 is transmitted to the steel pipe pile 12.

Above the steel pipe pile 12, a steel beam 20 supported by the steel pipe pile 12 is provided. The steel beam 20 is made of, for example, H-shaped steel, and an upper plate 24 is joined to a bottom surface (lower surface) of the steel beam 20 at a position facing the lower plate 14. A lower bolt hole is provided around the upper plate 24. An upper bolt hole 26 is provided at a position facing 18. The joining of the upper plate 24 and the processing of the upper bolt hole will be described later.
Further, a steel beam 22 is joined at a position where the upper plate 24 of the steel beam 20 is joined in a direction intersecting the steel beam 20. The steel beam 20 and the steel beam 22 are joined via a joining plate 34. That is, one end of the joining plate 34 is welded to the web of the steel beam 20 and the other end of the joining plate 34 is joined to the web of the steel beam 22 by bolting. Thereby, both the steel beam 20 and the steel beam 22 are supported by the steel pipe pile 12.

A base plate 28 for closing the inside of the pipe of the steel pipe pile 12 is inserted into the head 12 </ b> H of the steel pipe pile 12. The base plate 28 is formed of a steel plate in a circular shape, and the outer periphery is welded to the inner peripheral surface of the steel pipe pile 12. An adjustment bolt 30 that protrudes toward the beam 20 is provided at the center of the base plate 28. The adjustment bolt 30 is screwed into the base plate 28, and the amount of protrusion from the base plate 28 can be changed by adjusting the amount of screwing into the base plate 28. The head of the adjustment bolt 30 is brought into contact with the lower surface of the upper plate 24 to adjust the height of the steel beams 20 and 22.
A joining bolt 32 is inserted into the lower bolt hole 18 of the lower plate 14 and the upper bolt hole 26 of the upper plate 24 from below, and is joined by the joining bolt 32. At this time, the joining bolt 32 joins the upper plate 24 and the lower plate 14 with a predetermined gap between the adjusting bolts 30. After the upper plate 24 and the lower plate 14 are joined by the joining bolt 32, a filler such as a non-shrink mortar 36 is filled between the upper plate 24 and the lower plate 14. After filling the non-shrink mortar 36, the building 40 is finished. Thereby, the vertical load of the building 40 can be borne by the non-shrink mortar 36.

Here, the joining of the upper plate and the processing of the upper bolt hole will be described.
As shown in the plan view of FIG. 4A, first, the upper plate 24 is welded to the steel beam 20. The upper plate 24 is a steel plate and is formed in a rectangular shape having the same dimensions as the lower plate 14, and is arranged with the upper surface in contact with the bottom surface of the steel beam 20. At this time, when the center lines parallel to the X-axis and the Y-axis passing through the center C1 of the upper plate 24 are PX and PY, respectively, the center C1 of the upper plate 24 is the center of the installation position of the upper plate 24 in the design. And the center line PY is made to coincide with the central axis HJ of the steel beam 20. At this time, the center C1 of the upper plate 24 coincides with the designed center position of the steel pipe pile 12.
In this state, the upper plate 24 is welded to the bottom surface (flange portion) of the steel beam 20 (see FIGS. 2 and 3A). At this time, the upper plate 24 is not provided with the upper bolt hole 26.

Next, as shown in FIG. 4B, the upper bolt hole 26 is processed in the upper plate 24.
Specifically, when the steel beam 20 is installed at a set position (designed installation position of the steel beam 20), the upper bolt hole 26 is located at a position where the lower bolt hole 18 and the hole center coincide with each other. To open.
Here, the position of the lower bolt hole 18 is the position of the lower bolt hole 18 in a state where the steel pipe pile 12 is built in the ground 56 and the lower plate 14 in which the lower bolt hole 18 is processed is joined. Is measured and this measured value is used. In other words, the upper bolt hole 26 is not processed on site at the construction site, but is processed at, for example, a factory away from the site, using the measured value of the position of the lower bolt hole 18.

For example, when the steel pipe pile 12 is built without error, the center of the steel pipe pile 12 and the center C1 of the upper plate 24 match, and the position of the lower bolt hole 18 also matches the design value. At this time, the upper bolt hole 26 is opened at a position indicated by a two-dot chain line as designed (a distance y2 from the center line PX, a distance x2 from the center line PY, and a position centered at a point C3 away from the center line PY). Thus, the upper bolt hole 26 can be opened with the lower bolt hole 18 and the hole center aligned. Note that “the hole centers match” is sufficient if the joining bolts 32 can be inserted into the upper bolt holes 26 and the lower bolt holes 18, and the hole centers of the upper bolt holes 26 and the lower bolt holes 18 are not completely aligned. Absent.

  On the other hand, when the steel pipe pile 12 is built with a slight error (when the center C2 is shifted by the distance x1 in the X-axis direction and the distance y1 in the Y-axis direction), the position of the lower bolt hole 18 is also the same amount. , Will shift in the same direction. Accordingly, in this case, a point C3 moved from the design position by the distance x1 in the X-axis direction and the distance y1 in the Y-axis direction (the distance y2 + y1 from the center line PX, the distance x2-x1 from the center line PY) The upper bolt hole 26 indicated by a solid line is processed at the center position). Thereby, the error at the time of pile 12 construction can be absorbed, without carrying out field adjustment in a work site.

In addition, it is desirable that the joining operation of the upper plate 24 and the machining operation of the upper bolt hole 26 are performed not at the construction site but at a factory or the like. Thereby, reliable joining and highly accurate processing can be expected. Furthermore, the work process at the construction site can be reduced. Moreover, the setting position of the steel beams 20 and 22 of the building 40 is ensured only by adjusting the position of the upper bolt hole 26 of the upper plate 24 without being affected by the construction error of the individual steel pipe piles 12, and the steel pipe piles 12. And the steel beam 20 can be joined.

According to this embodiment, the steel pipe pile 12 and the steel beams 20 and 22 can be joined by the pile beam joining part 10 by joining the upper plate 24 and the lower plate 14 which are disposed to face each other.
At this time, the upper bolt hole 26 provided in the upper plate 24 is the lower bolt hole 18 of the lower plate 14 when the steel beam 20 is installed at the set position with the upper plate 24 joined to the bottom surface of the steel beam 20. Is processed into a position where the cores coincide with each other and are carried to the construction site. As a result, it is possible to join the beam 20 and the upper plate 24 and process the upper bolt hole 26 to the upper plate 24 in an environment where the environment is good. Position accuracy can be improved. As a result, the work process at the construction site can be reduced, and the construction period can be shortened.

Next, the joining method of the pile beam joining part 10 is demonstrated.
First, the process of welding the lower plate 14 to the head 12H of the steel pipe pile 12 built in the ground 56 is performed. At this time, a lower bolt hole 18 is provided around the lower plate 14, and a pile head hole 16 is provided in the center. The lower plate 14 is joined to the outer peripheral surface of the steel pipe pile 12 by inserting the head portion 12H of the pile head hole 16 into the pile head hole 16.
Next, the process of joining the upper plate 24 on the central axis of the beam 20 supported by the steel pipe pile 12 is executed. At this time, the upper plate 24 is welded to the bottom surface of the beam 20 with the center line aligned with the center axis of the beam 20.
Next, a step of forming the upper bolt hole 26 around the upper plate 24 is executed. Specifically, when the beam 20 is installed at the set position, the upper bolt hole 26 is formed at a position where the lower bolt hole 18 of the lower plate 14 coincides with the hole center.
Next, the step of inserting the base plate 28 into the head 12H of the steel pipe pile 12 and joining the inner peripheral surface of the steel pipe pile 12 and the base plate 28 is executed.
Next, the adjustment bolt 30 is provided on the base plate 28, the adjustment bolt 30 is brought into contact with the lower surface of the upper plate 24, and the adjustment bolt 30 is adjusted to adjust the height of the steel beam 20.
Next, the joining bolt 32 is inserted into the lower bolt hole 18 and the upper bolt hole 26 and the upper plate 24 and the lower plate 14 are joined with the joining bolt 32 with the joining bolt 32 interposed therebetween.
Finally, a step of filling a filler such as a non-shrink mortar between the upper plate 24 and the lower plate 14 that are bolted by the joining bolt 32 is executed.

By executing the above-described method, the upper bolt hole 26 is processed in the upper plate 24 in a state where the upper plate 24 is joined to the steel beam 20. That is, when the steel beam 20 is installed at the set position, the steel plate 20 is processed into a position where the lower bolt hole 18 of the lower plate 14 and the hole center coincide.
For example, the pile position of the steel pipe pile 12 is measured after the lower plate 14 is joined, and the upper bolt hole 26 is processed in the upper plate 24 by matching the lower bolt hole 18 and the hole center based on the measurement result. . Accordingly, the positions of the upper bolt hole 26 and the lower bolt hole 18 can be matched without processing the upper bolt hole 26 on site. As a result, the work process at the construction site can be reduced.
In addition, although this embodiment demonstrated the case where the cross-sectional shape of the steel pipe pile 12 was circular, it is not limited to this, Other shapes, such as a rectangle, may be sufficient if it is a steel pile. The steel beams 20 and 22 are both H-shaped steel. However, the present invention is not limited to this, and other shapes such as a rectangle may be used as long as they are steel beams.

10 Pile-beam joint 12 Steel pipe pile (steel pile)
14 Lower plate 16 Pile head hole 18 Lower bolt hole 20 Steel beam (beam)
22 Steel beams (beams)
24 Upper plate 26 Upper bolt hole 28 Base plate 30 Adjustment bolt 32 Joint bolt 36 Non-shrink mortar (filler)

Claims (3)

Steel piles,
The lower plate to which the head of the steel pile is inserted into the hole for the pile head formed in the central part and joined to the outer peripheral surface of the steel pile;
A lower bolt hole formed around the lower plate;
A beam supported by the steel pile;
An upper plate that matches the center line on the central axis of the beam and is joined to the bottom surface of the beam;
The lower bolt of the lower plate is formed around the upper plate based on the position of the lower bolt hole of the lower plate joined to the outer peripheral surface of the steel pile, and the beam is installed at a set position. An upper bolt hole in which the hole and the hole core coincide,
A base plate inserted into the head of the steel pile and joined to the inner peripheral surface of the steel pile;
An adjustment bolt that is provided on the base plate and adjusts the height of the beam in contact with the lower surface of the upper plate;
A joining bolt that is inserted into the lower bolt hole and the upper bolt hole, and joins the upper plate and the lower plate with the adjustment bolt interposed therebetween;
A filler filled between the upper plate and the lower plate;
Pile-beam joint structure with.   The pile beam connection structure according to claim 1, wherein the beam is carried into a construction site after finishing the connection of the upper plate to the bottom surface of the beam and the processing of the upper bolt hole to the upper plate. Inserting a steel pile head into a pile head hole formed in a lower plate provided with a lower bolt hole around it and joining the outer peripheral surface of the steel pile; and
Matching the center line on the central axis of the beam supported by the steel pile, and joining the upper plate to the bottom surface of the beam;
When the beam is installed at a set position, a step of forming an upper bolt hole having a hole center matching the lower bolt hole of the lower plate around the upper plate;
Inserting a base plate into the head of the steel pile, and joining the inner peripheral surface of the steel pile;
Providing the base plate with an adjustment bolt that contacts the lower surface of the upper plate and adjusts the height of the beam;
Inserting a joining bolt into the lower bolt hole and the upper bolt hole, and joining the upper plate and the lower plate with the adjustment bolt interposed therebetween;
Filling a filler between the upper plate and the lower plate;
A method for joining pile beams.

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