JP6592562B1 - Pile-column connection structure and method - Google Patents

Abstract

The present invention provides a pile-column joint structure and a joint construction method to be constructed by a one-pile / one-column method. SOLUTION Formed by placing a pile (1) on the ground and placing the pile head (1a) on the ground surface, and filling the cylinder inside the pile head with a filler (5) The column core confirmation process that measures and records the misalignment of the pile core (C1) and the column core (C2) on the pile head end face (6), and the pile head (1a) is spaced in the circumferential direction. A connection preparation step for projecting the connection bolt (7a) upward, and a base with the height adjusted by inserting the connection bolt (7a) into the through hole (12a) of the base plate (12) of the column base (10) After filling the non-shrink mortar (16) between the plate (12) and the pile head end face (6) and installing it at a predetermined height position, the nut ( 8) fastening the hardware mounting step, and the column core recorded in the column core checking step on the column base (2) of the steel column (2) on the diaphragm plate (11) of the column base hardware (10). It is composed of a column standing process that welds and fixes in the state positioned at (C2). To have. [Selection] Figure 1

Description

The present invention relates to a connection between a pile and a column, and in particular, a pile and a column in a foundation structure called “one-pile one-column method” or “no foundation method” that is constructed without forming a foundation beam or footing. The present invention relates to a joining structure and a joining method.

In general foundation structures in buildings, etc., foundation beams and footings are integrally formed on the pile heads of the piles that have been laid. For example, when building low-rise buildings with relatively small loads, etc. The foundation is called “one-pile one-column method” or “no foundation method” in which the column base of the steel column is joined to the pile head in a one-to-one relationship without forming foundation beams or footings. The structure (hereinafter simply referred to as “one-pile one-column system”) is employed.

Japanese Patent No. 6096367 Japanese Patent No. 5538151 Japanese Patent No. 5449124 Japanese Patent No. 3900344

When joining a pile and a column in the “1 pile 1 column method”, the pile core at the pile head of the pile placed on the ground and the column core at the column base of the steel column that constructs the building are mutually matched. It is customary not to do so.

In other words, the column core is specified as the position where the column base of the steel column should be installed on the design drawing, while the pile core is within the range of tolerance because of placing the pile on the ground. It is inevitable that the pile head is displaced. For this reason, it is the present condition that the position shift of a horizontal direction and a vertical direction arises between the pile core of a pile head, and the column core of a column base.

Therefore, in order to provide a joint structure between a pile and a column in the “one-pile one-column system”, the column base portion in an environment in which the pile core of the pile head and the column core of the column base portion are displaced from each other. There is a demand for a structure that can be stably and firmly joined in a state in which the lower end center of each is aligned with a predetermined column core position, and this is a problem.

In addition, in order to provide a method for joining a pile and a column in the “one pile and one column method”, the lower end center of the column base is made to coincide with a predetermined column core position in an environment in which the above-described positional displacement occurs. In this state, there is a need for a configuration that is simple and easy to work, and that enables accurate alignment, and this is a problem.

The present invention provides a pile-column joint structure and a joint construction method that solve the above problems. Then, the place where the pile-column connection structure of the present invention is configured as a means is that the steel column is connected to the pile head of the hollow cylindrical steel plate pile placed on the ground via the column base hardware. It is a structure that joins the column base, and the pile head forms a pile head end face with a filling filled in the cylinder, and projects a plurality of connecting bolts upward from the outer periphery of the pile head The column head is configured to measure a displacement between the pile core and the column core on the pile head end surface, and the column base metal is provided with a base plate provided with a through hole through which the connection bolt is inserted, and an upper surface of the base plate. A base plate fixed to the base and a diaphragm plate fixed on the base, and the base plate of the column base metal is heightened by adjusting means constituted by the through hole and the connecting bolt. Non-shrinkage filled between the base plate and the pile head end face with the position adjusted It is installed at a predetermined height position by a rutal, and is fixedly mounted on a pile head by fastening a nut to the connecting bolt inserted through the through hole, and the column base of the steel column is the column base On the metal diaphragm plate, it is welded and fixed in a state where it is positioned at the column core.

Moreover, the place where the method for joining the pile and the column of the present invention is configured as a means is a joining method for carrying out the joining structure, placing the pile on the ground, and placing the pile head on the ground surface. Column head confirmation which records and records the displacement of the pile core and the column core on the pile head end surface while forming the pile head end surface by filling the cylinder inside the pile head A step of preparing a connection and a step of welding the plurality of screw-type joints including the connection bolts to the outer shell steel plate at intervals in the circumferential direction of the pile head, and causing the connection bolts to protrude upward; With the base plate of the column base facing the pile head, the height position of the base plate is adjusted with the connecting bolt inserted through the hole, and no shrinkage is generated between the base plate and the pile head end surface. After installing the base plate at a predetermined height position by filling with mortar A hardware mounting step of fastening a nut to the connection bolt inserted from the through hole, and a column base portion of the steel column on the diaphragm plate of the column base hardware on the column core recorded in the column core confirmation step It is in the point which consists of the column standing-up process of welding and fixing to a diaphragm board in the state which was located.

According to the present invention, the pile-steel column connection structure and method based on the “one-pile-one-column system” are used in an environment in which the pile core of the pile head and the column core of the column base are displaced from each other. The effect is that the bottom end center of the column base is aligned with a predetermined column core position, and can be stably and firmly joined, and the operation is simple and easy, and also enables accurate alignment. There is.

It is a perspective view which shows the pile head of the pile which comprises one Embodiment of this invention, the column base part of a steel column, and the apparatus for joining in a decomposition | disassembly state. 1 shows a column base metal used in an embodiment of the present invention, (A) is a perspective view showing a state in which a diaphragm plate is separated, (B) is a plan view, and (C) is a cross-sectional view taken along the line CC. It is. Regarding the joining method of the present invention, (A) is a sectional view showing a placing process, (B) is a sectional view showing a process of forming a pile head end face, (C) is a plan view showing a column core confirmation process, (D). And (E) are a cross-sectional view and a plan view showing a connection preparation process related to welding of a threaded joint. Regarding the joining method of the present invention, (A) and (B) are a cross-sectional view and a perspective view showing a hardware mounting process related to mounting of a column base metal, (C) is a cross-sectional view showing an example using a holding means of a base plate, (D) is sectional drawing which shows the state which completed the hardware mounting process by filling of non-shrink mortar and fastening of a nut. (A) And (B) is sectional drawing and perspective view which show the column standing installation process of welding and fixing the column base part of a steel column to a diaphragm board regarding the joining construction method of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

This invention provides the joining structure and joining method for joining a pile and a steel column based on "1 pile 1 pillar system".

(Basic configuration)
FIG. 1 shows a pile head 1a of a pile 1, a column base 2a of a steel column 2, and an apparatus for joining in an exploded state. As described above, the pile core C1 located at the center of the upper end of the pile head 1a in the pile 1 placed in the ground, and the column specified as the position where the steel column 2 should be installed on the design drawing of the building The column core C2 located at the center of the lower end of the leg 2a causes a lateral displacement on the plane indicated by the X direction and the Y direction and a positional displacement in the height direction indicated by the Z direction.

The pile 1 is a ready-made concrete pile, a pile with a hollow cylindrical steel plate as shown in the figure, for example, an SC pile, is provided with a hollow cylindrical interior 3 in the center, and an outer shell on the outer periphery. A steel plate 4 is provided.

As shown in FIG. 1, the pile head 1 a is filled with a filling 5 made of concrete or the like from the opening at the upper end into the cylindrical interior 3 and hardens the filling 5 in a state flush with the cylindrical end face of the pile. Thus, the pile head end face 6 is formed.

Moreover, the pile head 1a welds the screw type joint 7 provided with the connection bolt 7a to the outer shell steel plate 5 at intervals in the circumferential direction, and makes the connection bolt 7a protrude above the pile head end face 6. ing. As shown in the figure, the threaded joint 7 has a structure in which a connecting bolt 7a is screwed into a cylindrical sleeve 7b having a female screw. A plurality are attached at predetermined positions spaced apart in the direction. A nut 8 and a washer 9 that can be screwed onto the connecting bolt 7a are prepared.

The column base 2a of the steel column 2 is joined to the pile head 1a via the column base 10. The column base 10 is provided with a diaphragm plate 11 as shown in FIG. The diaphragm plate 11 is formed by forming a support surface 11a on the upper surface of a rectangular plate body and providing a center hole 11b at the center. For example, Sengcia stock marketed as construction hardware for joining columns and beams, etc. A “Smart Dia” (registered trademark) manufactured by the company can be used.

The column base 10 is configured by fixing a base 13 on the base plate 12 by welding or the like, and further fixing the diaphragm plate 11 on the base 13 by welding or the like. The outer peripheral portion of the base 13 and the peripheral portion of the base plate 12 are connected by a rib plate 14 by welding or the like to constitute a high-strength rigid structure as a whole.

A through-hole 12a corresponding to the connecting bolt 7a is provided at a predetermined interval in the flange portion of the base plate 12 that projects from the seat 13 together with the rib plate 14. Accordingly, the column base 10 is arranged on the axis of the pile head 1a by inserting the connecting bolt 7a through the through hole 12a, and the center of the center hole 11b of the diaphragm plate 11 is arranged on the axis. It is configured as follows.

(Joint method and joint structure)
Hereinafter, the joining method and the joining structure will be clarified by explaining the joining method of the pile and the pillar according to the present invention step by step for each process.

(Placement process)
As shown in FIG. 3A, the pile 1 is driven on the ground based on the conventional driving method, and the pile head 1a is made to face the ground surface GL.

(Column core confirmation process)
When earth and sand are infiltrated into the cylindrical interior 3 of the pile head 1a at the time of placing, the earth and sand are removed, and subsequently, as shown in FIGS. 3 (B) and 3 (C), from the upper end opening of the pile head 1a. A pile head end face 6 is formed by filling the inside 3 of the cylinder with a filler 5 made of concrete or the like and curing the filler 5 in a state flush with the cylinder end face of the pile.

Thereby, since the pile head 1a can specify the above-mentioned pile core C1 by the center position of the pile head end surface 6, the standing position of the steel column 2 for joining to the pile head 1a in a later process That is, after specifying the column core C2 located at the center of the lower end of the column base 2a, the displacement between the pile core C1 and the column core C2 is measured. Therefore, as shown in the drawing, the pile core C1 and the column core C2 are mutually displaced in the lateral direction (X direction and Y direction) and in the height direction (Z direction) between the height positions H1 and H2. Misalignment is measured.

Therefore, the measurement result is recorded by any means after confirmation. At this time, the lateral displacement can be easily performed by measuring the pile core C1 and the column core C2 on the pile head end face 6 formed by the filler 5 such as concrete while marking the pile core C1. it can.

(Consolidation preparation process)
Thereafter, as shown in FIGS. 3D and 3E, a plurality of screw joints 7 are fixed by welding at predetermined intervals in the circumferential direction of the pile head 1a, and the connecting bolt 7a is protruded upward. . Thereby, the preparation for connecting the column base metal object 10 is prepared.

(Hardware mounting process)
The column base 10 is assembled at the factory and then carried to the site. That is, as a rigid structure in which a seat 13 is welded on the base plate 12, the diaphragm plate 11 is welded on the seat 13, and the rib plate 14 is welded between the seat 13 and the base plate 12. It is carried on site.

As shown in FIGS. 4 (A) and 4 (B), the column base metal 10 allows the base plate 12 to face the pile head 1a and, when the connecting bolt 7a is inserted into the through hole 12a, the pile 1 in this state. It is set on the shaft center and can move in the vertical direction through the sliding of the connecting bolt 7a and the through hole 12a. Accordingly, the height position of the base plate 12 is adjusted by the adjusting means constituted by the connecting bolt 7a and the through hole 12a, and is held at the predetermined height position. Such adjustment of the height position is performed by holding the support surface 11a of the diaphragm plate 11 of the column base metal 10 at the same height position H2 as that of the column core C2 on the pile head end surface 6 set to the height position H1. It is done for the purpose of making it.

Incidentally, in order to facilitate the work of this point, as shown in FIG. 4C, the base plate 12 is placed on the adjustment holding nut 15 screwed to the connecting bolt 7a, and the nut 15 is mounted. You may comprise so that the height position of the base board 12 may be adjusted by rotating.

Therefore, with the base plate 12 held at a predetermined height position, as shown in FIG. 4D, a non-shrink mortar 16 is filled between the base plate 12 and the pile head end face 6. As a result, the base plate 12 of the column base metal 10 is supported on a support layer excellent in load resistance constituted by two layers of the filler 5 made of concrete and the non-shrink mortar 16.

Next, the nut 8 is fastened to the connecting bolt 7 a inserted from the through hole 12 a of the base plate 12 through the washer 9. Thereby, the column base metal 10 is stably and firmly mounted on the pile head 1a, and in this state, the support surface 11a of the diaphragm plate 11 is set at the same height position H2 as the column core C2, and the center The center C3 of the hole 11b is located concentrically with the pile core C1.

(Stand-up process)
After passing through the above steps, as shown in FIGS. 5A and 5B, the column base 2a of the steel column 2 faces the diaphragm plate 11 of the column base metal 10 and is welded and fixed to the support surface 11a.

At this time, on the support surface 11a, the column core C2 is identified from the center C3 of the center hole 11b on the basis of the measurement value relating to the positional deviation between the pile core C1 and the column core C2 recorded in the column core confirmation step. The center of the lower end of the column base 2a is matched with the specified column core C2, and the column base 2a is welded and fixed to the diaphragm plate 11 in this state.

Thereby, with respect to the pile head 1a, the steel column 2 is suitably joined and erected with the column base 2a matched with the column core C2 via the column base 10.

DESCRIPTION OF SYMBOLS 1 Pile 1a Pile head C1 Pile core 2 Steel column 2a Column base C2 Column core 3 Cylindrical inside 4 Outer shell steel plate 5 Filling (concrete)
6 Pile head end surface 7 Threaded joint 7a Connection bolt 7b Tubular sleeve 8 Nut 9 Washer 10 Column base 11 Diaphragm plate 11a Support surface 11b Center hole C3 Center of hole 12 Base plate 12a Through hole 13 Base 14 Rib plate 15 Adjustment Retaining nut 16 Non-shrink mortar

Claims (2)

The column base (2a) of the steel column (2) is attached to the pile head (1a) of the hollow cylindrical steel plate pile (1) placed in the ground via the column base (10). A joining structure,
The pile head (1a) forms a pile head end surface (6) with a filler (5) filled in the cylindrical interior (3), and a plurality of connecting bolts (7a) are directed upward from the outer periphery of the pile head. Projecting and configured to measure the misalignment of the pile core (C1) and the column core (C2) on the pile head end face (6),
The column base metal (10) includes a base plate (12) having a through hole (12a) through which the connecting bolt is inserted, a base (13) fixed on the base plate, and the base It is composed of a diaphragm plate (11) fixed on top of
The base plate (12) of the column base hardware has the height position adjusted by the adjusting means configured by the through hole (12a) and the connecting bolt (7a), and the base plate (12) and the base plate (12). Installed at a predetermined height by the non-shrink mortar (16) filled between the pile head end faces (6), and fastens the nut (8) to the connecting bolt (7a) inserted from the through hole (12a) Is mounted and fixed on the pile head (1a),
The column base (2a) of the steel column (2) is welded and fixed in a state of being positioned on the column core (C2) on the diaphragm plate (11) of the column base metal. A pile-column connection structure. A bonding method for carrying out the bonding structure according to claim 1,
Placing the pile (1) on the ground and placing the pile head (1a) on the ground surface; and
The pile head end surface (6) is formed by filling the cylinder interior (3) of the pile head with a filler (5), and the pile core (C1) and the column core are formed on the pile head end surface (6). A column core confirmation process for measuring and recording the positional deviation of (C2),
A plurality of threaded joints (7) provided with the connection bolts (7a) are welded to the outer shell steel plate (4) at intervals in the circumferential direction of the pile head (1a), and the connection bolts (7a ) To project upward,
With the base plate (12) of the column base (10) facing the pile head, the height of the base plate is adjusted in a state where the connection bolt (7a) is inserted into the through hole (12a), After the base plate (12) is installed at a predetermined height by filling the base plate (12) and the pile head end surface (6) with a non-shrink mortar (16), the base plate (12) is inserted from the through hole. A hardware mounting step of fastening a nut (8) to the connecting bolt (7a) to be taken out;
The column base (2a) of the steel column (2) is positioned on the column core (C2) recorded in the column core confirmation step on the diaphragm plate (11) of the column base metal (10). A method for joining a pile and a column, characterized by comprising a column erecting step for welding and fixing to a diaphragm plate.

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