KR20170124436A - Joint mechanism and connection method for steel pipe - Google Patents

Joint mechanism and connection method for steel pipe Download PDF

Info

Publication number
KR20170124436A
KR20170124436A KR1020167028611A KR20167028611A KR20170124436A KR 20170124436 A KR20170124436 A KR 20170124436A KR 1020167028611 A KR1020167028611 A KR 1020167028611A KR 20167028611 A KR20167028611 A KR 20167028611A KR 20170124436 A KR20170124436 A KR 20170124436A
Authority
KR
South Korea
Prior art keywords
inner joint
joint
steel pipe
engaging
unit member
Prior art date
Application number
KR1020167028611A
Other languages
Korean (ko)
Inventor
토모유키 스즈키
?스케 키쿠치
šœ스케 키쿠치
마사시 토야마
타케시 나가시마
히로유키 야마모토
Original Assignee
가부시끼 가이샤 구보다
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 가부시끼 가이샤 구보다 filed Critical 가부시끼 가이샤 구보다
Priority claimed from PCT/JP2015/085888 external-priority patent/WO2016132648A1/en
Publication of KR20170124436A publication Critical patent/KR20170124436A/en

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
    • E02D5/526—Connection means between pile segments
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements

Abstract

Thereby simplifying the structure of connecting the pair of steel pipes and reducing the cost. The jointing mechanism of the pair of steel pipe piles 1A and 1B has inner joints 10A and 10B and outer joints 20 that are formed around the outer joints 10A and 10B. The outer joint 20 is composed of a plurality of unit members 21 arranged side by side around the inner joints 10A and 10B, The standard unit member 21A has the engaging convex portion 24 and engages with the engaging convex portion 24 on the inner joints 10A and 10B to prevent the standard unit member 21A from falling outward And a standard unit member 21A is formed on a wall surface of the engaging concave portion 14 so that the engaging convex portion 24 can be engaged with the engaging concave portion 14. [ Cut-out portions 15A and 15B that can be inserted into the cut-out portions 15A and 15B are provided.

Description

TECHNICAL FIELD [0001] The present invention relates to a joining mechanism for a steel pipe,

The present invention relates to a joining mechanism and a joining method of a steel pipe.

Steel pile piles are used as an example of steel pipes to constitute base piles for foundation installation, sheet piles for retaining piles, landslide suppression piles, pillars for piers. Long steel pipe piles are required to reach the solid ground below the soft ground. Due to the reasons such as manufacturing and transportation, steel pipe piles of several meters to several tens of meters manufactured by the factory are brought into the field, So as to form a predetermined length while connecting the steel pipe pile up and down.

As a mechanism for connecting steel pipe piles as described above, Patent Document 1 proposes a mechanical joint mechanism.

The coupling mechanism is formed such that the inward circumferential grooves of the outer fitting member and the outward circumferential grooves of the inner fitting member have the same groove width and the inner fitting member is formed with the inward circumferential groove And the outward circumferential grooves are opposed to each other so that the key member previously embedded in the inward circumferential grooves is pushed toward the outward circumferential grooves and fitted over the inward circumferential grooves and the outward circumferential grooves so that the length of the steel pipe pile So that it is impossible to move relative to each other.

Japanese Patent Publication No. 3158081

However, since the structure in which the key member is preliminarily housed in the inward peripheral groove and is pushed toward the outward peripheral groove at the time of connection is apt to complicate the structure, and the groove width capable of accommodating the entire key member in the inward peripheral groove is required, There is a problem in that the thickness of the fitting member becomes thicker.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to simplify the structure of connecting a pair of steel pipes and to reduce costs.

A first feature of the present invention is a joint mechanism of a steel pipe, comprising: a first inner joint provided at one end of the steel pipe; a second inner joint provided at the other end of the steel pipe; And a second inner joint of the one of the steel pipes and a second inner joint of the other steel pipe adjacent to each other so as to connect the pair of the steel pipes, Wherein the engaging portion is provided on one of the outer periphery of each of the first inner joint and the second inner joint and the inner periphery of the outer joint, Wherein the first and second inner joints are provided with fitting portions for preventing the pair of steel pipes from moving relative to each other in the longitudinal direction of the steel pipe by fitting the first and second inner joints, Wherein the plurality of unit members are provided with an end portion on the first inside joint side and an end portion on the second inside joint side with an engaging convex portion Wherein the first inner joint and the second inner joint are each provided with an engagement concave portion engaged with the engagement convex portion to prevent the standard unit member from falling outwardly, And a cutout portion is provided in at least a part of a wall surface constituting the engaging concave portion so that the engaging convex portion of the standard unit member can be inserted into a position corresponding to the engaging concave portion.

Wherein a first inner joint provided at one end of one steel pipe and a second inner joint provided at the other end of the other steel pipe are adjacent to each other so as to provide an outer joint over the first inner joint and the second inner joint, A standard unit member having an engaging convex portion at an end portion on the first inside joint side and an end portion on the second inside joint side among a plurality of unit members constituting the joint are inserted through the cutout portion, The engaged portion can be engaged.

The standard unit member, which is provided around the first inner joint and the second inner joint through the cutout portion, is provided with a first inner joint and a second inner joint, while maintaining the engagement between the engagement portion and the engaged portion. The first inner joint and the second inner joint are slid in the circumferential direction of the steel pipe along the engaging recess provided in the second inner joint, thereby being disposed at predetermined positions of the first inner joint and the second inner joint.

Since the outer joint is constituted by a plurality of unit members which are large enough to lift the worker by using his / her hands, for example, the work of hanging up by a machine such as a crane becomes unnecessary, .

Therefore, it is not necessary to provide a mechanism for embedding the key portion as the engaging portion in advance, for example, in the outer key groove as the engageable portion, and to send it outwardly as in the conventional coupling mechanism. The thickness can be reduced and the material cost can be reduced. In addition, since the first inner joint and the second inner joint can be formed in the same shape, the machining cost can be reduced.

The second feature of the joining mechanism according to the present invention is that the plurality of unit members further include a closed unit member having a shape free from a step with the outer circumferential surface around the cutout portion when the unit members are disposed in the cutout portion, And a fixing mechanism for fixing the closed unit member to at least the first inside joint or the second inside joint.

The cutout portion is closed by securing the closing unit member to the first inside joint and the second inside joint. Also, the relative movement in the circumferential direction of the first inner joint and the second inner joint connected through the outer joint is also suppressed.

The third feature of the joint mechanism according to the present invention is that the cutout portion is composed of a first cutout portion provided in the first inside joint and a second cutout portion provided in the second inside joint, When the first inner joint of the one steel pipe and the second inner joint of the other steel pipe are adjoined to each other so as to connect the pair of steel pipes to the inner joint and the second inner joint, And a positioning mechanism for positioning the second cutout portion so as to face the longitudinal direction of the steel pipe is provided.

It is possible to easily position the first cutout portion and the second cutout portion so as to face each other along the longitudinal direction of the steel pipe by the positioning mechanism when connecting the pair of steel pipes.

According to a fourth aspect of the present invention, the positioning mechanism includes: a hole portion provided on an opposing face of each of the first inner joint and the second inner joint; And a positioning pin inserted into the hole portion.

A reliable positioning can be realized at a low cost by a simple structure such as a hole provided in the facing surface of each of the first inner joint and the second inner joint and a positioning pin inserted into the hole.

The fifth feature of the present invention is that the to-be-engaged portion is an outward peripheral groove provided on the outer periphery of each of the first inner joint and the second inner joint, and the engagement portion is formed on the inner periphery of the outer joint And the inner circumferential groove is engaged with the outer circumferential groove to prevent the pair of steel pipes from moving relative to each other in the longitudinal direction of the steel pipe.

It is not necessary to embed the key member in the inward peripheral groove beforehand as in the case of the conventional joining mechanism, so that the thickness of the outer joint can be reduced and the material cost can be reduced . In addition, since the first inner joint and the second inner joint can be formed in the same shape, the machining cost can be reduced.

According to a sixth aspect of the present invention, the engaging portion is an outer key portion provided on the outer periphery of each of the first inner joint and the second inner joint, and the engaged portion is provided on the inner periphery of the outer joint And the inner circumferential groove for preventing the pair of steel pipes from moving relative to each other in the longitudinal direction of the steel pipe by engaging the outer key portion.

It is not necessary to incorporate the key member in the inward peripheral groove in advance as in the case of the conventional joining mechanism, so that the thickness of the outer joint can be reduced and the material cost can be reduced . In addition, since the first inner joint and the second inner joint can be formed in the same shape, the machining cost can be reduced.

The seventh characteristic feature of the joint mechanism according to the present invention is that the first inner joint and the second inner joint are formed by a straight core steel pipe and the joint portion of the straight core steel pipe is formed by the first inner joint and the second inner joint And is disposed at a position that does not overlap with the cutout portion of the joint.

Straight steel tubes are manufactured using sheet rolling. The copyright processing method is cheaper than the ring forging method which manufactures the seamless steel pipe. By forming the first inner joint and the second inner joint from the straight core steel pipe, the first inner joint and the second inner joint can be obtained at low cost.

However, the straight core steel pipe has a joint portion along its longitudinal direction and is not uniform in the circumferential direction like a seamless steel pipe, so that the same rigidity can not be obtained in the circumferential direction, so that it is resistant to pressure and distortion.

In addition, the circumferential portion in which the cutout portion is formed of the first inner joint and the second inner joint is low in rigidity as compared with the other circumferential portions because the material is small at that portion.

Therefore, the cut-out portion is provided in the first inner joint and the second inner joint so as to be positioned not at the position where the joint portion of the straight deep steel pipe extends.

It is possible to prevent the rigidity of the first inner joint and the second inner joint from being excessively lower than those of the other portions by preventing the circumferential portion formed with the cutout portion from overlapping with the joint portion along the longitudinal direction of the straight steel tube .

The eighth characterizing feature of the joint mechanism according to the present invention resides in that the outer joint is formed of a straight core steel pipe, and the joint portion of the straight core steel pipe is disposed in the standard unit member.

As described above, the straight core steel pipe can be produced at a much lower cost than the seamless steel pipe. Therefore, the outer joint can be obtained at a low cost by forming the outer joint into the straight core steel pipe.

The closed unit member of the outer joint is disposed in the cutout portion of the first inner joint and the second inner joint. If the joining portion is disposed at a position overlapping the cutout portion, the rigidity is lowered in the cutout portion where the closed unit member having the joining portion is disposed.

Therefore, the joint is provided in the standard unit member.

By preventing the closing unit member and the joining portion from overlapping along the longitudinal direction of the straight steel pipe, it is possible to prevent a part of the joining mechanism from being excessively lower in rigidity than the other portions.

The first aspect of the connecting method according to the present invention is a connecting method for connecting a pair of steel pipes using a joint mechanism having any one of the first to seventh features, A first inner joint provided adjacent to the other inner joint provided at the other end of the other steel pipe; Positioning a first cutout portion provided in the first inner joint and a second cutout portion provided in the second inner joint so as to face each other along the longitudinal direction of the steel pipe; Wherein the first inner joint portion and the second inner joint portion are provided with an outer joint extending along the first inner joint portion and the second inner joint portion, And the second cutout portion and the second cutout portion, and a second unit cutout portion having a second unit cutout portion and a second cutout portion, Engaging an engaged portion for preventing the relative pair of steel pipes from moving relative to each other in the longitudinal direction of the steel pipe by engaging the engaging portion provided on either one of the pair of steel pipes with the engaging portion provided on the other side; Sliding the engaging convex portion in the circumferential direction of the steel pipe along the engaging concave portion provided in the first inner joint and the second inner joint while maintaining the engagement between the engaging portion and the engaged portion; Out portion of the plurality of unit members constituting the outer joint is inserted into the cutout portion, the closed unit member having a shape free from a step difference from the outer circumferential surface around the cutout portion is inserted into the first cutout portion and the second cutout portion Thereby engaging the outward circumferential groove and the inward key portion, or engaging the outward key groove and the inward circumferential groove; And fixing the closed unit member to at least the first inner joint or the second inner joint.

In the second aspect of the connecting method according to the present invention, in positioning the first cutout portion and the second cutout portion so as to face each other along the longitudinal direction of the steel pipe, the first inner joint and the second inner side Wherein the closed unit member is disposed in advance in one of the first cut-out portion and the second cut-out portion before adjoining the adjacent one of the first cut-out portion and the second cut- And positioning the out portion so as to oppose along the longitudinal direction of the steel pipe and separating the closed unit member once after positioning.

By using the closed unit member used in the subsequent step in positioning the first cutout portion and the second cutout portion so as to face each other along the longitudinal direction of the steel pipe, a separate structure for the positioning is unnecessary .

1 is an explanatory view of a steel pipe and a joint mechanism.
2 is an explanatory view of the inner joint.
3 is a side cross-sectional view of the inner joint.
Fig. 4 is an explanatory view of the engagement of the steel pipe pile according to the unit member.
5 is a side cross-sectional view for engaging a steel pipe pile according to a unit member.
FIG. 6 is an explanatory view of engagement of a steel pipe pile according to a unit member.
7 is a side cross-sectional view illustrating engagement of a steel pipe pile according to a unit member.
8 is a plan view of the engagement of the steel pipe pile according to the unit member.
Fig. 9 is an explanatory view of the closure of the cutout portion. Fig.
10 is a side cross-sectional view of the cutout portion for closing;
11 is a plan sectional view for closing the cutout portion.
12 is a side cross-sectional view of an inner joint according to another embodiment.
13 is a side cross-sectional view of an inner joint according to another embodiment.
14 is an explanatory diagram of a joint mechanism of a steel pipe according to another embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a joint mechanism and a connecting method of a steel pipe according to the present invention will be described with reference to the drawings.

Fig. 1 shows an example of a steel pipe, which is a cylindrical steel pipe pile 1 having an outer circumferential surface shape that is caught in the ground by hydraulic hammer, presser, rotary presser, etc. and a pair of steel pipe piles 1, In the direction indicated by the arrow. On the other hand, all of the steel pipe piles 1 have the same structure, but where one steel pipe pile 1 and another steel pipe pile 1 need to be explained separately from each other, one steel pipe pile 1 1), and the suffix B is attached to the sign of each constitution on the side of the other steel pipe pile (1).

The steel pipe piles 1 (1A and 1B) are constituted by welding inner and outer joints 10 of a substantially cylindrical shape and concentric to the both ends of the tubular bodies 2 (2A and 2B). The inner joint 10 to be welded to the opposite ends of the tubular bodies 2 (2A and 2B) has the same structure. However, when the steel tube pile 1 is inserted into the ground, A, and the suffix B is attached to each component on the side of the inner joint 10 positioned on the upper side. That is, one of the pair of inner joints 10A and 10B is the first inner joint and the other is the second inner joint. By making the first inner joint and the second inner joint have the same constitution, the manufacturing cost can be reduced as compared with the case of the other constitution.

2, the inner joint 10 has an inner fitting portion 12 having an outer diameter smaller than that of the base portion 11 extended to the base portion 11 having an outer diameter slightly larger than the outer diameter of the tubular body 2 Respectively. In the present embodiment, the outer diameter of the base portion 11 is larger than the outer diameter of the tubular body 2 by about 18 mm.

On the outer periphery of the inner fitting portion 12, a row of outward peripheral grooves 13 for engaging an inward key portion 23 described later is formed in a toric shape. An engaging concave portion 24 for engaging an engaging convex portion 24 provided at an end portion of an outer joint 20 to be described later is formed at an end face of the base portion 11 facing the inner fitting portion 12 side 14 are formed in a toric shape (see Fig. 1).

As shown in Fig. 1, the wall surfaces constituting the engaging concave portion 14 are provided with cutout portions 15 at four places in the circumferential direction at equal intervals in the present embodiment.

The inner joint 10A and the inner joint 10B are formed with holes 18 at predetermined positions on the contact surfaces of the inner joint 10A and the inner joint 10B. A positioning pin (19) is inserted into the hole (18).

3, when the inner joint 10A and the inner joint 10B are connected to each other, the positioning pin 19 is inserted into the hole 18A formed in the inner joint 10A and the hole 18A formed in the inner joint 10B, The cutout portion 15A provided in the inner joint 10A and the cutout portion 15B provided in the inner joint 10B are inserted into the hole portion 18B formed in the longitudinal direction of the steel pipe pile 1 As shown in Fig.

As shown in Fig. 1, the outer joint 20 has an outer diameter slightly larger than the outer diameter of the tubular body 2, and a cylindrical inner cylindrical body having an inner diameter sized to fit the inner joint 10, And eight unit members 21 that are formed by dividing them into equal parts. In this embodiment, the outer diameter of the outer joint 20 is larger than the outer diameter of the tubular body 2 by about 18 mm.

On the other hand, the eighth division is an example, and the number of the unit members 21 obtained by the division is less than or greater than eight, but the size of each of the divided unit members 21 can be increased Is preferable. Further, by using a simple manufacturing method of dividing the straight steel pipe, the unit member 21 can reduce the manufacturing cost compared with the case where the steel plate is manufactured one by one, for example, by bending.

The inner circumference of the outer joint 20 constituted by the eight unit members 21 can be engaged with the outer circumferential grooves 13 (13A, 13B) provided in the inner joint 10A and the inner joint 10B, The two annular inward key portions 23 (23A and 23B) arranged side by side on the inner fitting portion 12 (12A and 12B) of the inner joint 10 (10A and 10B) (13 (13A, 13B)) in a state in which the outer circumferential grooves 13

Four unit members 21 of each unit member 21 are formed with engaging convex portions 24 at upper and lower ends in the figure. The unit members 21 are standard unit members 21A. The standard unit member 21A is arranged such that the inward key portion 23 is engaged with the outward peripheral groove 13 of the inner joint 10 through the cutout portion 15 and then slides along the circumferential direction, The portion 24 and the engaging recess 14 are engaged with each other to prevent the standard unit member 21A from falling outward.

The remaining four unit members 21 are not provided with the engaging convex portion 24 and have a shape free from a step difference from the outer circumferential surface around the cutout portion 15 when the unit member 21 is disposed in the cutout portion 15 . These unit members 21 are the closed unit members 21B. The closing unit member 21B does not have the engaging convex portion 24 to engage with the engaging concave portion 14 of the inner joint 10 like the standard unit member 21A, Is formed. Bolt holes 16 (16A, 16B) are formed in the first inner joint 20A and the second inner joint 20B at positions corresponding to the openings. The closing unit member 21B can be fixed to the first inner joint 20A and the second inner joint 20B by using the bolts 33. [

The closing unit member 21B is fixed to the first inside joint 20A and the second inside joint 20B using the bolts 33 so that the inside joint 10A and the inside joint 20B connected via the outside joint 20 10B is also suppressed in the circumferential direction.

In the present embodiment, four standard unit members 21A and a closed unit member 21B are arranged alternately around the inner joint 10 to constitute a cylindrical outer joint 20.

Next, referring to Figs. 2 to 11, in a method of putting the steel pipe 1B into the ground by using a hydraulic hammer or the like, the following steel pipe pile 1B is connected to the steel pipe pile 1A Will be explained.

The jointing mechanism described above is used for connecting the pair of steel pipe piles 1A and 1B.

First, as shown in Fig. 1, Fig. 2 and Fig. 3, the inner joint 10A provided at the upper end of the one-sided steel pipe pile 1A which is embedded in advance is brought into contact with the inner joint 10B provided at the lower end thereof, (1B). At this time, the positioning pin 19 is previously inserted into the hole 18A formed in the inner joint 10A, and the steel pipe pile 1B is inserted into the inner joint 10B formed in the inner joint 10B by using a machine such as a crane And hung down while confirming that the positioning pin 19 is inserted into the hole portion 18B.

Next, as shown in Figs. 4 and 5, the standard unit member 21A is connected to the inner joints 10 (10A, 10B) via the cutout portions 15A, 15B, 10B) of the outer circumferential grooves 13 (13A, 13B).

Then, as shown in Figs. 6, 7 and 8, the standard unit member 21A is slid along the circumferential direction to a position where the engaging convex portion 24 and the engaging concave portion 14 are engaged with each other.

Next, as shown in Figs. 9 and 10, the closing unit member 21B is connected to the inner joints 10 (10A, 10B) through the cutout portions 15A, 15B so that the inward key portions 23 (13 (13A, 13B)) of the outer circumferential grooves 13 (13A, 13B).

Finally, as shown in Figs. 10 and 11, by fixing the closed unit member 21B to the inner joint 10 (10A, 10B) using the bolts 33, the pair of steel pipe piles 1A, Can be connected so as not to move relative to each other in the circumferential direction without relative movement in the longitudinal direction of the steel pipe pile (1).

The inner joint 10A and the inner joint 10B and the outer joint 20 are engaged with the outer periphery of the inner joint 10A and the inner joint 10B, The present invention is not limited to the structure in which the engaging portion is provided with the outer periphery of each of the inner joint 10A and the inner joint 10B, And the to-be-engaged portion is provided on the inner periphery of the outer joint 20 so that the pair of steel pipe piles 1A and 1B are engaged with each other in the longitudinal direction of the steel pipe pile 1 In order to prevent relative movement with respect to the inner circumferential groove.

The inner joint 10A and the inner joint 10B are provided with the holes 18 at predetermined positions on the contact surfaces of the inner joint 10A and the inner joint 10B and the holes 18 are provided with locating pins 19 are inserted and allowed to pass therethrough. However, the present invention is not limited to these embodiments.

The cutout portion 15A provided in the inner joint 10A and the cutout portion 15B provided in the inner joint 10B are positioned at positions opposing each other in the longitudinal direction of the steel pipe pile 1 As shown in Fig. 12, convex portions and concave portions to be fitted to each other may be provided along the circumferential direction on opposing surfaces of the inner joint 10A and the inner joint 10B, respectively.

A small diameter portion and a large diameter portion in which one end is fitted to the other end is provided on the opposing face of each of the inside joint 10A and the inside joint 10B as shown in Fig. May be provided along the circumferential direction.

Further, although not shown, cutout portions 15A provided on the inner joint 10A and cutout portions 15A provided on the inner joint 10B are provided on the opposing faces of the inner joint 10A and the inner joint 10B, (15B) is not required to be positioned at a position opposite to the longitudinal direction of the steel pipe pile (1).

The cutout portion 15A provided in the inner joint 10A and the cutout portion 15B provided in the inner joint 10B are formed so as to be opposed to each other in the longitudinal direction of the steel pipe pile 1 The inner joint 10A and the inner joint 10B are formed on the opposing surfaces of the inner joint 10A and the inner joint 10B in the case of the joint mechanism not having the positioning pin 19, In the case where the cutout portion 15A provided in the inner joint 10B and the cutout portion 15B provided in the inner joint 10B are not provided at positions opposing each other in the longitudinal direction of the steel pipe pile 1, The same connection method is preferably adopted.

As shown in Figs. 1, 2, and 3, the inner joint 10B provided at the lower end of the inner joint 10A provided at the upper end of the one-sided steel pipe pile 1A previously embedded is abutted against the steel pipe pile 1B ).

At this time, one or a plurality of closed unit members 21B are temporarily fixed to one or a plurality of cutout portions 15A having a plurality of cutout portions 15A in advance by using bolts 33 and the steel pipe pile 1B is fixed to a crane Machine is used to hang down while confirming that the closing unit member 21B is inserted into the cutout 15B formed in the inner joint 10B. Thus, the cutout portion 15A provided in the inner joint 10A and the cutout 15B provided in the inner joint 10B are positioned at positions opposed to each other in the longitudinal direction of the steel pipe pile 1.

On the other hand, one or a plurality of closed unit members 21B are temporarily fixed to one or a plurality of cutout portions 15B having a plurality of cutout portions 15B in advance by using bolts 33 and the steel pipe pile 1B is fixed to a crane A hanging may be performed by confirming that the closing unit member 21B is inserted into the cutout portion 15A formed in the inner joint 10A by using a machine.

After the positioning, the temporarily closed fixed unit member 21B is once detached. 4 and 5, the standard unit member 21A is connected to the inner joint portion 23 (23A, 23B) through the cutout portions 15A, 15B in the same manner as the above description, (13 (13A, 13B)) of the housing 10 (10A, 10B).

Then, as shown in Figs. 6, 7 and 8, the standard unit member 21A is slid along the circumferential direction to a position where the engaging convex portion 24 and the engaging concave portion 14 are engaged with each other.

Next, as shown in Figs. 9 and 10, the closing unit member 21B is connected to the inner joints 10 (10A, 10B) through the cutout portions 15A, 15B so that the inward key portions 23 (13 (13A, 13B)) of the outer circumferential grooves 13 (13A, 13B).

Finally, as shown in Figs. 10 and 11, by fixing the closed unit member 21B to the inner joint 10 (10A, 10B) using the bolts 33, the pair of steel pipe piles 1A, , So that they can be connected so as not to move relative to each other in the circumferential direction without relative movement in the longitudinal direction of the steel pipe pile (1).

The cutout portion 15A provided on the inner joint 10A and the cutout 15B provided on the inner joint 10B are provided in the longitudinal direction of the steel pipe pile 1 without the positioning pin 19 And is positioned at the opposite position.

In the above-described embodiment, the inner joint 10 and the outer joint 20 are formed by machining the cylindrical bodies of the main mandrel into predetermined shapes, respectively. However, the present invention is not limited to these embodiments. For example, as shown in Fig. 14, the inner joint 20 and the outer joint 20 may be formed of a straight core steel pipe. On the other hand, the tubular body 2 can be formed of, for example, a spiral steel pipe.

The straight steel core pipe is manufactured by using a plate-making method in which a flat plate-like steel plate is formed into a cylindrical shape by using a large roll or press, and the joint portion 3 is welded on the inner and outer surfaces. The copyright processing method is cheaper than the ring forging method which manufactures the seamless steel pipe. By forming the inner joint 10 and the outer joint 20 from the straight core steel pipe, the inner joint 10 and the outer joint 20 are obtained at low cost.

However, the straight core steel pipe has the joint portion 3 along its longitudinal direction, and since it is not homogeneous in the circumferential direction like a seamless steel pipe, the same rigidity in the circumferential direction can not be obtained, and it is resistant to pressure and distortion.

In addition, the circumferential portion in which the cutout portions 15A and 15B of the inner joint 10A and the inner joint 10B are formed has a lower rigidity than the other circumferential portions because the material is small at that portion.

Therefore, the cutout portions 15A and 15B are provided on the inner joint 10A and the inner joint 10B such that the cutout portions 15A and 15B are positioned not at the position where the joint portion 3 of the straight core steel pipe extends.

The circumferential portion in which the cutout portions 15A and 15B are formed and the joining portion 3 are not overlapped along the longitudinal direction of the straight steel pipe, so that some of the inside joint 10A and the inside joint 10B It is possible to prevent the rigidity from becoming excessively lower than that of the portion.

On the other hand, the inner joint 10A and the inner joint 10B are preferably connected such that the respective joint portions 3 do not overlap along the longitudinal direction of the steel pipe pile 1.

The closed unit member 21B of the outer joint 20 is disposed in the cutout portions 15A and 15B of the inner joint 10A and the inner joint 10B. The rigidity of the cutout portions 15A and 15B where the closed unit member 21B having the joining portion 3 is disposed is reduced when the joining portion 3 is disposed at a position overlapping the cutout portions 15A and 15B.

Therefore, the joint portion 3 is provided in the standard unit member 21A.

By preventing the closing unit member 21B and the joining portion 3 from overlapping along the longitudinal direction of the straight steel pipe, it is possible to prevent a part of the joining mechanism from being excessively lower in rigidity than the other portions.

On the other hand, among the plurality of standard unit members 21A, the standard unit member 21A having the joining portion 3 is formed of the inner joining 10A and the inner joining 10B with respect to the inner joining 10A and the inner joining 10, It is preferable that the joint portion 3 is provided at a position other than the position where the joint portion 3 is disposed.

The jointing mechanism of the steel pipe according to the present invention may be used for connecting steel pipes such as steel pipe sheet piles for soil retention, landslide suppressing piles, and pillar columns in addition to foundation piles for installation of structures.

The above-described embodiments are all examples of the present invention, and the present invention is not limited to the above description, and the specific constitution of each part can be appropriately modified and designed within the range in which the action and effect of the present invention is exerted.

1 Steel Pipe Pile (Steel Pipe)
2 tubular body
10 internal joint
11 base portion
12 inner fitting portion
13 Outer circumferential groove (pawl portion)
14 engaging recess
15 cutout
16 volt hole
18 hole
19 pin
20 Outer joint
21 Unit Units
21A Standard unit absence
21B Closure unit member
22 opening
23 Inward key part (engagement part)
24 engaging convex portion
33 volts

Claims (10)

As a joint mechanism of a steel pipe,
A first inner joint provided at one end of the steel pipe and a second inner joint provided at the other end; And
Wherein the first inner joint of one of the steel pipes and the second inner joint of the other steel pipe are adjacent to each other so as to connect the pair of the steel pipes and the first inner joint and the second inner joint of the other steel pipe are adjacent to each other, And an outer joint provided,
Wherein the engaging portion is provided on one of the outer periphery of each of the first inner joint and the second inner joint and the inner periphery of the outer joint and the engaging portion is engaged on the other side, And a to-be-engaged portion for preventing relative movement in the lengthwise direction of the frame,
Wherein the outer joint is composed of a plurality of unit members arranged in parallel around the first inner joint and the second inner joint,
Wherein the plurality of unit members include a standard unit member having an end on the first inside joint side and an engaging convex portion on the end on the second inside joint side,
Wherein the first inner joint and the second inner joint include engagement recesses that engage with the engagement convex portion to prevent the standard unit member from falling outwardly,
Wherein at least a part of the wall surface constituting the engaging concave portion includes a cutout portion capable of passing through the engaging convex portion of the standard unit member to a position corresponding to the engaging concave portion. The method according to claim 1,
Wherein the plurality of unit members further comprise a closed unit member having a shape free from a step with an outer circumferential surface around the cutout portion when disposed in the cutout portion,
And a fixing mechanism for fixing the closed unit member to at least the first inside joint or the second inside joint. The method according to claim 1 or 2,
Wherein the cutout portion comprises a first cutout portion provided in the first inner joint and a second cutout portion provided in the second inner joint,
When the first inner joint of the one steel pipe and the second inner joint of the other steel pipe are adjoined to the first inner joint and the second inner joint so as to connect the pair of steel pipes, Out portion and the second cut-out portion are arranged to face each other along the longitudinal direction of the steel pipe. The method of claim 3,
Wherein the positioning mechanism includes: a hole portion provided on an opposing surface of each of the first inner joint and the second inner joint; And a positioning pin inserted into the hole portion. 5. The method according to any one of claims 1 to 4,
Wherein said engageable portion is an outward peripheral groove provided on an outer periphery of each of said first inner joint and said second inner joint,
Wherein the engaging portion is an inward key portion provided on an inner periphery of the outer joint to prevent the pair of steel pipes from moving relative to each other in the longitudinal direction of the steel pipe by engaging with the outward peripheral groove. 5. The method according to any one of claims 1 to 4,
Wherein the engaging portion is an outer key portion provided on an outer periphery of each of the first inner joint and the second inner joint,
Wherein the engageable portion is an inner circumferential groove provided on the inner periphery of the outer joint for preventing the pair of steel pipes from relatively moving in the longitudinal direction of the steel pipe by engaging the outer key portion. Instrument. 7. The method according to any one of claims 1 to 6,
Wherein the first inner joint and the second inner joint are formed as a straight core steel pipe,
And the joint portion of the straight steel tube is disposed at a position that does not overlap the cut-out portion of the first inner joint and the second inner joint. The method according to any one of claims 1 to 7,
Wherein the outer joint is formed as a straight steel pipe,
Wherein a joint portion of the straight steel pipe is disposed in the standard unit member. A connecting method for connecting a pair of steel pipes using the joining mechanism according to any one of claims 1 to 8,
A first inner joint provided at one end of one steel pipe and a second inner joint provided at the other end of the other steel pipe;
Positioning a first cutout portion provided in the first inner joint and a second cutout portion provided in the second inner joint so as to face each other along the longitudinal direction of the steel pipe;
Wherein the first inner joint portion and the second inner joint portion are provided with an outer joint extending along the first inner joint portion and the second inner joint portion, Through the first cut-out portion and the second cut-out portion, the standard unit member having the engaging convex portion,
An engaging portion provided on one of the outer periphery of each of the first inner joint and the second inner joint and the inner periphery of the outer joint and the engaging portion provided on the other side, Engaging a engaged portion to prevent relative movement of the steel pipe in a longitudinal direction thereof;
Sliding the engaging convex portion in the circumferential direction of the steel pipe along the engaging concave portion provided in the first inner joint and the second inner joint while maintaining the engagement between the engaging portion and the engaged portion;
Out portion of the plurality of unit members constituting the outer joint is inserted into the cutout portion, the closed unit member having a shape free from a step difference from the outer circumferential surface around the cutout portion is inserted into the first cutout portion and the second cutout portion Thereby engaging the outward circumferential groove and the inward key portion, or engaging the outward key groove and the inward circumferential groove; And
And fixing the closed unit member to at least the first inner joint or the second inner joint. The method of claim 9,
And positioning the first cutout portion and the second cutout portion so as to face each other along the longitudinal direction of the steel pipe,
The closing unit member may be disposed in advance in one of the first cutout portion and the second cutout portion before the first inner joint and the second inner joint are adjacent to each other,
Positioning the first cut-out portion and the second cut-out portion so as to face each other along the longitudinal direction of the steel pipe using the closed unit member, and removing the closed unit member once after the positioning Wherein the connecting means comprises:
KR1020167028611A 2015-02-17 2015-12-22 Joint mechanism and connection method for steel pipe KR20170124436A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2015028870 2015-02-17
JPJP-P-2015-028870 2015-02-17
PCT/JP2015/085888 WO2016132648A1 (en) 2015-02-17 2015-12-22 Joint mechanism and connection method for steel pipe
JP2015250212A JP6594193B2 (en) 2015-02-17 2015-12-22 Steel pipe joint mechanism and connection method
JPJP-P-2015-250212 2015-12-22

Publications (1)

Publication Number Publication Date
KR20170124436A true KR20170124436A (en) 2017-11-10

Family

ID=56761081

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020167028611A KR20170124436A (en) 2015-02-17 2015-12-22 Joint mechanism and connection method for steel pipe

Country Status (4)

Country Link
US (1) US20180119380A1 (en)
JP (1) JP6594193B2 (en)
KR (1) KR20170124436A (en)
SG (1) SG11201608073UA (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111809649B (en) * 2020-07-02 2021-08-13 中交第三航务工程局有限公司 Offshore pile splicing anticorrosion process for offshore wind power foundation steel pipe pile
CN112302051A (en) * 2020-11-06 2021-02-02 中铁工程装备集团有限公司 Mechanical vertical shaft structure and construction method thereof
CN113737785A (en) * 2021-09-17 2021-12-03 南京新核复合材料有限公司 Fiber reinforced polymer tubular pile connecting joint
USD988481S1 (en) * 2021-12-15 2023-06-06 Kubota Corporation Mechanical joint

Also Published As

Publication number Publication date
JP2016153593A (en) 2016-08-25
JP6594193B2 (en) 2019-10-23
US20180119380A1 (en) 2018-05-03
SG11201608073UA (en) 2016-11-29

Similar Documents

Publication Publication Date Title
KR20170120486A (en) Joint mechanism and connection method for steel pipe
KR20170124436A (en) Joint mechanism and connection method for steel pipe
TWI541448B (en) Joint structure of steel pipe pile, and steel pipe pile
CN102282063B (en) Link and link assembly for track-type machine
CN104487651A (en) A tubular connection
KR102104021B1 (en) Apparatus for connecting steel pipe
GB2491489A (en) Split pipe repair fitting
JP6579945B2 (en) Steel pipe pile
CA2909529A1 (en) Expandable high pressure and high temperature seal
JP4990698B2 (en) Segment fitting bracket
JP2015021256A (en) Built-up concrete column
WO2016132648A1 (en) Joint mechanism and connection method for steel pipe
JP4450579B2 (en) Steel pipe and steel pipe connection structure
JP2009024436A (en) Mechanical joint of steel pipe pile
JP6939668B2 (en) Steel pipe connection structure
JP2013163906A (en) Steel pipe pile
JP7151807B2 (en) Method for manufacturing steel pipe sheet piles having mechanical joint pipes
JP5676309B2 (en) Steel pipe sheet pile connection structure
JP7160150B1 (en) Joint pipe, manufacturing method thereof, design method thereof, steel pipe with joint pipe, manufacturing method thereof, design method thereof, steel pipe pile and construction method of steel pipe pile
JP6902980B2 (en) Yatko
JP4698237B2 (en) Method for forming tube insertion protrusion
JP2022094128A (en) Sliding lock-type joint of precast member that includes rc segment, and precast member that includes rc segment provided with the same
KR101461834B1 (en) Apparatus and Method for Connecting Metal Pipe
JP4444682B2 (en) Concrete pipe
JP2006307540A (en) Aseismatic joint device for manhole

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application