JPH07292662A - Connection structure of steel pipe pile - Google Patents

Abstract

PURPOSE:To facilitate connection between piles by passing through cylindrical members and the ends of a steel pipe element with interlocking members in the direction of a pipe diameter in a state to fit the ends of the steel pipe element respectively to circular grooves, and interlocking and connecting their fitting conditions. CONSTITUTION:Connection structure is formed of a cylindrical body having an outside diameter larger than that of a steel pipe element 3 and having an inside diameter smaller than that of the element 3 and, at the same time, cylindrical members 5 forming circular grooves 4 recessed in the shape of a circle in the direction of the cylindrical axis in each of both end faces and capable of fitting the ends of the element 3 are equipped as the main sections. Then, after the upper end of the element 3 inserted into a lower hole 2 previously and the lower end of the element 3 to be inserted thereinto are fitted respectively in the circular grooves 4, and interlocking members 6 are penetrated respectively to the ends of the element 3 and both ends of the members 5 in the direction of the pipe diameter to interlock and connect their fitting conditions. According to the constitution, the connection between piles can be easily made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting steel pipe piles, and more particularly, to a joint between a plurality of steel pipe pile elements that are sequentially inserted into a prepared hole dug into the ground from the ground surface,
The present invention relates to a steel pipe pile connection structure used to integrally connect the steel pipe pile element on the ground surface when the steel pipe pile element is inserted.

[0002]

2. Description of the Related Art For example, in a part of a mountainous area, there are places where landslides are likely to occur. As one of the means for preventing the occurrence of landslides in such places, a plurality of steel pipe piles are used. It is carried out in a state where it is driven from the ground surface to the ground at the location. In order to actually install such a steel pipe pile, first, after digging a prepared hole so as to reach the stable formation from the ground surface, sequentially insert a plurality of steel pipe pile elements into the prepared hole, the sequence Field work is performed to integrally connect joints of a plurality of steel pipe pile elements to be inserted on the ground surface when the steel pipe pile elements are inserted. In such field work, conventionally, the seams of a plurality of steel pipe pile elements that are sequentially inserted are welded on the ground surface when the steel pipe pile elements are inserted to integrally connect the seams. It was

[0003]

However, in general,
Welding work is extremely difficult at a welding site where the scaffold is an inclined surface, which is affected by nature such as wind and rain.
There was a problem of workability. Further, there is a problem in that the welding work usually requires a worker who is skilled in the welding technique. The present invention has been made by paying attention to such an actual situation, and an object thereof is to provide a means capable of solving a plurality of problems at once, such as the problem of the workability described above and the problem that the operator is limited. I am trying.

[0004]

A steel pipe pile connection structure according to the present invention (hereinafter, referred to as the present invention structure) has a plurality of steel pipe pile elements which are sequentially inserted into a prepared hole dug into the ground from the ground surface. The joint structure of the steel pipe pile used for integrally connecting the seam of the steel pipe pile element on the ground surface when the steel pipe pile element is inserted, the joint structure having an outer diameter larger than the outer diameter of the steel pipe pile element. , And a tubular body having an inner diameter smaller than the inner diameter of the steel pipe pile element, and at both end faces thereof, an annular groove which is recessed annularly in the tubular axial direction and into which the end portion of the steel pipe pile element can be fitted is formed. Provided with the formed tubular member, in the state that the end of the steel pipe pile element is fitted into the annular groove, respectively, to both of the tubular member and the end of the steel pipe pile element, a locking member, respectively. The fitting state is locked by penetrating or almost penetrating both in the pipe radial direction. And a are to the point as a first characterizing feature.

Further, a joint between a plurality of steel pipe pile elements that are sequentially inserted into a prepared hole dug from the ground surface into the ground,
A steel pipe pile connection structure used for integrally connecting on the ground surface when inserting the steel pipe pile element, wherein the outer diameter is set to be smaller than the inner diameter of the steel pipe pile element. A solid or hollow columnar member having a small diameter portion that can be fitted into the end portion of the element is provided at least at both ends, and the small diameter portion is fitted into the end portion of the steel pipe pile element, respectively, in the steel pipe pile element. The second point is that the engaging member is penetrated or substantially penetrated in the pipe radial direction into both of the end portion and the small diameter portion fitted in the end portion to engage and connect the fitted state. It is provided as a characteristic configuration.

[0006]

By using the structure of the present invention having the first characteristic structure,
When integrally connecting the joints of multiple steel pipe pile elements on the ground surface when inserting the steel pipe pile element, the upper end of the steel pipe pile element already inserted in the prepared hole and the steel pipe pile to be inserted from now on The lower end of the element is simply fitted into each of the annular grooves formed on both end faces of the tubular member, and then both of the end of the steel pipe pile element and both ends of the tubular member,
Since the locking members are simply penetrated or substantially penetrated together in the pipe radial direction to lock and connect the fitting state, anyone can easily perform the locking connection in the fitting state. Moreover, when the joint of a plurality of steel pipe pile elements is integrally connected on the ground surface at the time of inserting the steel pipe pile elements by using the structure of the present invention having the second characteristic configuration, it is already inserted in the prepared hole. Into the upper end of the steel pipe pile element and the lower end of the steel pipe pile element to be inserted, after simply fitting both small-diameter portions of the columnar member, respectively, the end of the steel pipe pile element and the columnar member. Both the small-diameter portion and the small-diameter portion are simply penetrated or substantially penetrated together in the pipe radial direction to lock and connect the fitted state, so that anyone can easily fit the fitted state. The locking connection can be performed.

[0007]

Therefore, even when the joint of a plurality of steel pipe pile elements is integrally connected on the ground surface when the steel pipe pile elements are inserted by using the structure of the present invention having the first characteristic configuration, In addition, by using the structure of the present invention having the second characteristic configuration, the joints of a plurality of steel pipe pile elements are integrally connected on the ground surface when the steel pipe pile elements are inserted, and in any case. Unlike conventional welding work, ordinary workers who are not skilled in welding technology can work with good workability and can join the joints of the multiple steel pipe pile elements. Multiple problems, such as sex problems and problems of limited workers, will be solved all at once.
Incidentally, after the entire steel pipe pile is installed in the ground, since the joints of the steel pipe pile elements are integrally connected by the above-described structure of the present invention, the joint portion of the steel pipe piles is subjected to bending stress and shearing. It goes without saying that it will endure stress.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment (corresponding to claim 1) FIGS. 1 and 2 show a first embodiment of a connection structure for steel pipe piles according to the present invention. In FIG. 2, reference numeral 1 denotes the ground surface at a place where landslide is likely to occur in a mountainous area, and the ground surface 1 is dug down into the ground (more specifically, to reach a stable stratum in the ground). A plurality of steel pipe pile elements 3 (specifically, centrifugal force casting pipes having a length of about 10 m) are sequentially inserted into the holes 2. And these steel pipe pile elements 3
Of the steel pipe pile element 3 using the connection structure.
When they are inserted into the prepared hole 2, they are integrally connected at the ground surface 1.

Specifically, the connection structure is constructed as follows. That is, as shown in FIG. 1, the connecting structure has a tubular body having an outer diameter larger than that of the steel pipe pile element 3 and an inner diameter smaller than that of the steel pipe pile element 3. In addition, a cylindrical member 5 is formed as a main part on both end surfaces of which an annular groove 4 is formed which is recessed annularly in the axial direction of the cylinder and into which the ends of the steel pipe pile element 3 can be fitted. The tubular member 5 is a cast steel product obtained by a casting method, or a steel product obtained by subjecting an appropriate material to an appropriate metal working. And in the connection structure,
With the ends of the steel pipe pile elements 3 fitted in the annular grooves 4, respectively, locking members 6 are provided in both the tubular member 5 and the ends of the steel pipe pile elements 3 in the pipe radial direction. It is configured such that the fitting state is locked and connected by being penetrated together. In addition, more specifically, the locking member 6 has a plurality of through holes 5a and 3a provided in the end portions of the tubular member 5 and the steel pipe pile element 3 in the circumferentially equidistant state, respectively. A pin with a head that allows the legs to be inserted individually. This pin is more preferably a tapered pin.

When the steel pipe pile connecting structure of the present invention having such a structure is used, the upper end portion of the steel pipe pile element 3 already inserted in the prepared hole 2 and the lower end portion of the steel pipe pile element 3 to be inserted from now on. Are simply fitted into the annular grooves 4 formed on both end surfaces of the tubular member 5, respectively, and then the steel pipe pile element 3
Since both of the end portion of the cylindrical member 5 and both end portions of the tubular member 5 are simply passed through the locking member 5 in the pipe radial direction to lock and connect the fitted state, anyone can easily The locking connection in the fitted state can be performed.

It should be noted that the locking member 5 is made to substantially penetrate the both ends of the steel pipe pile element 3 and both ends of the tubular member 5 instead of penetrating as described above. Even in the closed state, the locking connection in the fitted state is possible. Further, the locking member 6 has a plurality of female screw holes (not shown) provided in the end portions of the tubular member 5 and the steel pipe pile element 3 in a state of being equally arranged in the circumferential direction, It may be a bolt in which the male screw portions can be individually screwed.

[Second Embodiment] (Corresponding to Claim 2) FIG. 3 shows a second embodiment of the connection structure for steel pipe piles according to the present invention. Note that, in FIG. 3, the portions denoted by the same reference numerals as those in the first embodiment indicate the same or corresponding portions. In this 2nd Example, the connection structure of the said steel pipe pile is comprised as follows. That is, the connection structure of the steel pipe pile has a solid columnar shape having an outer diameter smaller than the inner diameter of the steel pipe pile element 3 and a small diameter portion 7 which can be fitted into the end portion of the steel pipe pile element 3 at both ends. The member 8 is provided as a main part. The columnar member 8 has an enlarged diameter in the middle abdomen, and the expanded diameter portion 8a is placed on the upper end surface of the steel pipe pile element 3 already inserted into the prepared hole 2 (see FIG. 2). The columnar member 8 is temporarily locked. And in the said connection structure, in the state which each said small diameter part 7 was each fitted in the edge part of the said steel pipe pile element 3, the said small diameter part 7 fitted in the edge part of the said steel pipe pile element 3, and the end part. The locking member 9 is made to substantially penetrate through both of them in the pipe radial direction so that the fitted state is locked and coupled. It should be noted that all of the locking members 9, specifically, a plurality of through holes 3a provided in a state of being equally distributed in the circumferential direction with respect to the end portion of the steel pipe pile element 3, and the columnar member. 8, a plurality of insertion holes 8b provided equidistantly in the circumferential direction are provided with legs, each of which is composed of a pin with a head that can be inserted individually.

When the steel pipe pile connection structure of the present invention having such a structure is used, the upper end portion of the steel pipe pile element 3 already inserted into the prepared hole 2 and the lower end portion of the steel pipe pile element 3 to be inserted from now on To the both small diameter portions 7 of the columnar member 8
, Respectively, and then, the locking member 9 is substantially penetrated into both of the end portion of the steel pipe pile element 3 and the small diameter portion 7 of the columnar member 8, and Since the fitting state is locked and coupled, anyone can easily perform the locking coupling in the fitted state.

In the second embodiment, the locking member 9 is used.
Of the steel pipe pile element 3 after penetrating the end thereof,
Although it was configured to be inserted into the insertion hole 8b of the columnar member 8, a part of the locking member 9 is made to penetrate the end of the steel pipe pile element 3 and then the columnar member 8 is formed. It may be configured to penetrate. Further, the locking member 9 includes the columnar member 8 and the steel pipe pile element 3
The bolts may be such that the male screw portions can be individually screwed into a plurality of female screw holes (not shown) provided at the end portions of the respective ones in a state where they are evenly arranged in the circumferential direction. Further, the bolt may simply penetrate the end portion of the steel pipe pile element 3 and be screwed into only the female screw hole of the columnar member 8.

The columnar member 8 is a solid columnar member in the above-mentioned embodiment, but is a hollow columnar member (not shown).
May be Moreover, the columnar member 8 may have a middle abdomen which is not expanded in diameter in the above-described embodiment, that is, a member which is composed of the small diameter portion 7 over the entire length.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the installation status of steel pipe piles.

FIG. 3 is a vertical cross-sectional view showing a main part of a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing another embodiment.

[Explanation of symbols]

 1 Ground surface 2 Prepared hole 3 Steel pipe pile element 4 Annular groove 5 Cylindrical member 6,9 Locking member 7 Small diameter part 8 Columnar member

Claims (2)

[Claims] 1. A seam of a plurality of steel pipe pile elements (3) sequentially inserted into a prepared hole (2) dug down from the ground surface to the ground, the joint being formed at the time of inserting the steel pipe pile elements (3). A connecting structure for steel pipe piles used for integrally connecting at a surface, the outer diameter being larger than the outer diameter of the steel pipe pile element (3),
In addition, the steel pipe pile element (3) is formed of a tubular body having an inner diameter smaller than that of the steel pipe pile element (3), and the end portions of the steel pipe pile element (3) are fitted in both end surfaces of the tubular body by annular depressions in the tubular axial direction. A tubular member (5) having a free annular groove (4) is provided, and the tubular member (5) is fitted with the ends of the steel pipe pile elements (3) in the annular groove (4). 5) and the end of the steel pipe pile element (3), respectively, the locking member (6) is penetrated or substantially penetrated together in the pipe radial direction, and the steel pipe pile is locked and connected in the fitted state. Connection structure. 2. A seam of a plurality of steel pipe pile elements (3) sequentially inserted into a prepared hole (2) dug down from the ground surface to the ground, when the steel pipe pile element (3) is inserted into the ground seam. A connection structure of steel pipe piles used for integrally connecting on a surface, wherein an outer diameter is smaller than an inner diameter of the steel pipe pile element (3), and the inside of the end portion of the steel pipe pile element (3). A solid or hollow columnar member (8) having a small diameter portion (7) that can be fitted into at least both ends is provided, and the small diameter portion (7) is fitted into the end portion of the steel pipe pile element (3), respectively. In this state, the locking member (6) is penetrated or substantially penetrated in the pipe radial direction into both of the end of the steel pipe pile element (3) and the small diameter part (7) fitted in the end. A steel pipe pile connection structure in which the fitted state is locked and connected.