KR20200092577A - Steel pipes for lifting settlement structure and constructing method thereof - Google Patents

Abstract

Provided in the present invention are a circular steel pipe pile for lifting subsided structures, which can be easily constructed in narrow spaces and under tricky working environments during structure lifting construction, can be re-used and shorten a construction period in order to reduce construction costs, and can improve product quality by means of improved constructability and structural performance; and a construction method thereof. To this end, a circular steel pipe pile which is press-fit into the underground of a structure for lifting subsided structures comprises: a circular steel pipe pile member of a predetermined length, wherein a fastening hole with female threads is perforated at both ends thereof; a connecting socket steel pipe which is inserted between the circular steel pipe pile members so as to connect the circular steel pipe pile members to each other, and in which an assembly hole with female threads is perforated corresponding to the fastening hole; and a fastening member which is screw-coupled in a state in which the fastening hole and the assembly hole are aligned in order to monolithically fasten the circular steel pipe pile member and the connecting socket steel pipe. Therefore, according to the present invention, the fastening hole of the circular steel pipe pile and the assembly hole of the connecting socket steel pipe can be easily aligned, and can be monolithically assembled by the fastening member, thereby enabling easy construction even in narrow spaces and under tricky working environments. Furthermore, the circular steel pipe pile and the connecting socket steel pipe are screw-coupled by the fastening member so as to allow re-use after disassembly, thereby shortening a construction period because of convenience in construction and thus providing economic feasibility. In addition, the connecting socket steel pipe is inserted between the circular steel pipe piles to provide excellent flexural and compressive strength, thereby improving product quality.

Description

Circular steel pipe pile and its construction method for raising settlement structures{STEEL PIPES FOR LIFTING SETTLEMENT STRUCTURE AND CONSTRUCTING METHOD THEREOF}

The present invention relates to a circular steel pipe pile for raising a settlement structure, and more particularly, to a circular steel pipe pile for raising a settlement structure with improved construction performance and structural performance, and a construction method thereof.

In general, uneven settlement of structures occurs due to various reasons, such as weakening of the ground, fluctuations in groundwater, trenching adjacent to the structure, imbalance of the structure's own weight, poor basic construction, and increase in traffic for heavy vehicles.

The present inventor patented a prestressed steel pipe pile for raising a settled structure that is easy to maintain by increasing pile stiffness and adjusting displacement through re-tension by using a socket-type steel pipe, and has excellent on-site workability. It was proposed in 1559268 (registered on October 2, 2015).

In the above patent, in the steel pipe pile that is pressed into the lower ground of the structure for the purpose of raising the structure, the socket is continuously press-fitted as the male screw portion is formed on the lower outer circumferential surface and the female screw portion is formed on the upper inner circumferential surface and is united by screwing. Type steel pipe; After completion of the press-fit, a fixing member is provided at the bottom and a thread is formed at the top in a state where the soil in the socket-type steel pipe is removed, and a tension member is inserted into the socket-type steel pipe and placed therein; A filling material injected into the socket-type steel pipe so as to fix the tension material in the socket-type steel pipe; A fixing plate having a withdrawal hole for withdrawing the tension material to the outside and located on the top of the socket-type steel pipe; It is made of a tightening nut to introduce a prestress into the socket-type steel pipe by fastening by being screwed with a tension material from the outside of the fixing plate, but the socket-type steel pipe is press-fitted through a hole drilled in an existing foundation or an expansion base extending from the existing foundation. A hydraulic jack seating plate installed symmetrically and installed so as to be able to install a hydraulic jack on its outer circumferential surface, a slider slidably installed along a socket-type steel pipe and raised by the hydraulic jack, extending from the slider and hanging the lower end on the lower surface of the workman The configuration of the pulling member to be installed and the ring formed on the outer circumferential surface of the slider and the ring pin previously fixed to the existing foundation or expansion base is described.

The present inventor intends to further improve the constructability and structural performance of a socket-type steel pipe that is continuously installed by screwing by forming a male screw portion on the lower outer circumferential surface and a female screw portion on the upper inner circumferential surface among the above technical configurations.

As the background technology of the present invention, Patent No. 10-1774404 (Registration on Sep. 4, 2017)'File promotion system and file promotion method for basic reinforcement and impression of buildings', Patent No. 10-0621669 (2006 Aug. 31. Registration)'Impression of structure using indentation and basic reinforcement method', Patent No. 10-0807810 (Registered on Nov. 28, 2007)'Impression method of structure by basic reinforcement', patent No. 10-1195236 No.(Registration on Oct. 22, 2012)'Structural impression method using tee-shaped support steel', Patent No. 10-1586376 (Registration on Dec. 12, 2016)'Structure using steel pipe with impression jack installed', Patent No. 10 -0816044 (Registration on Mar. 24, 2008) There are'Structural impression and support method using micro files'.

The present invention is the result of research on the socially customized industry-academic cooperation leading university (LINC+) nurturing project conducted by the Ministry of Education and the Korea Research Foundation with funding.

The present invention can be easily constructed even in a narrow space and a difficult working environment when constructing a structure, and it is possible to reduce construction cost by reducing reuse and construction time, and improve construction quality and structural performance that can also be expected to improve quality. The aim is to provide a circular steel pipe pile and a construction method for raising the settled structure.

The present invention, in order to achieve the above object, in the circular steel pipe pile to be pressed into the lower ground of the structure for the purpose of raising the settlement structure, a circular steel pipe pile member made of a certain length and having a female threaded fastening holes at both ends, and a circular steel pipe The connecting socket steel pipe is inserted between the circular steel pipe pile members so that the pile members can be connected to each other, and the female screw assembly hole is drilled in correspondence with the fastening hole, and the fastening hole and the assembly hole so that the circular steel pipe pile member and the connecting socket steel pipe can be integrated together. It is made of a fastening member that is screwed in this aligned state.

The circular steel pipe pile member has a semi-circular alignment groove penetrated through the center of its end, and the connecting socket steel pipe has an alignment hole corresponding to the alignment groove formed through the central portion thereof.

A jig member is further provided to fix the connection socket steel pipe which is inserted through the alignment hole and is inserted into the circular steel pipe pile member at both ends and is seated in the alignment groove.

The fastening member is made of a tanned bolt so as to prevent protruding to the outside in a state where the circular steel pipe pile member and the connecting socket steel pipe are mutually fastened.

Inside the connecting socket steel pipe, one side is cut out and a circularly banded stopper plate is inserted to prevent excessive insertion of the tanned bolt.

And the present invention is a method for constructing a circular steel pipe pile that is press-fitted and installed on the ground under the structure for the purpose of raising the settlement structure in order to achieve another task, a process of pressing a circular steel pipe pile into the ground, an assembling hole drilled in a connecting socket steel pipe The process of fastening the jig member to, the process of fixing the position of the connecting socket steel pipe in the circular steel pipe pile by seating the jig member in the alignment groove at the top of the circular steel pipe pile, to the fastening hole of the circular steel pipe pile member in alignment and the assembly hole of the connecting socket steel pipe The process of integrally fastening the lower part of the connecting socket steel pipe to the upper part of the circular steel pipe pile member by screwing the fastening member, the process of removing the jig member from the connecting socket steel pipe, the process of inserting and positioning a new circular steel pipe pile member on the upper part of the connecting socket steel pipe, The process of arranging the alignment grooves at the ends of the circular steel pipe pile member at the connecting socket steel pipe alignment hole, screwing the fastening member to the assembly hole of the circular steel pipe pile member in alignment and the connecting socket steel pipe assembly, to create a new upper part of the circular steel pipe pile member. It includes a process of continuously installing a circular steel pipe pile member.

According to the present invention, the fastening hole of the round steel pipe pile and the assembling hole of the connecting socket steel pipe can be easily aligned, and by being assembled integrally by the fastening member, there is an effect that it can be easily constructed even if the place is narrow and the working environment is difficult.

In addition, according to the present invention, since the circular steel pipe pile and the connecting socket steel pipe are screwed together by a fastening member, it can be reused after dismantling, and has a very economical effect in that the construction period can be shortened by simple construction.

In addition, according to the present invention, since the connecting socket steel pipe is inserted between the round steel pipe piles, it is possible to expect a quality improvement in that the bending strength and compression strength are very excellent.

1 is a perspective view of a circular steel pipe pile for raising the settlement structure according to the present invention.
2 is an exploded perspective view of a circular steel pipe pile for raising the settlement structure according to the present invention.
3 is a perspective view of a stopper plate of a circular steel pipe pile for raising a settlement structure according to the present invention.
4 is a cross-sectional view of a circular steel pipe pile for raising the settlement structure according to the present invention.
5 is a photograph of a bending test of a circular steel pipe pile for raising the settlement structure according to the present invention.
Figure 6 is a graph of the results of the bending test of the circular steel pipe pile for the settlement structure according to the present invention.
7 is a compression test photograph of a circular steel pipe pile for raising the settlement structure according to the present invention.
8 is a graph showing the results of compression experiments of a circular steel pipe pile for raising a settlement structure according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a circular steel pipe pile for raising the settlement structure according to the present invention.

First, it will be described with reference to the accompanying Figures 1 and 2.

In an embodiment of the present invention, in the circular steel pipe pile pressed into the lower ground of the structure for the purpose of raising the settlement structure, the circular steel pipe pile member 10 having a predetermined length and having a female threaded fastening hole 11 at both ends, The connecting socket steel pipe 20, which is embedded between the circular steel pipe pile members 10 and is female-assembled assembly holes 21 corresponding to the fastening holes 11, so as to connect the circular steel pipe pile members 10 to each other, and circular The steel pipe pile member 10 and the connecting socket steel pipe 20 are made of a fastening member 30 which is screwed in a state in which the fastening hole 11 and the assembly hole 21 are aligned so as to integrally bind them.

According to the above technical configuration, after inserting the connecting socket steel pipe 20 on top of the circular steel pipe pile member 10 and aligning the fastening hole 11 of the circular steel pipe pile member and the assembling hole 21 of the connecting socket steel pipe, the fastening member Tighten (30) to fasten it all together.

Subsequently, another circular steel pipe pile 10 is inserted into the exposed connecting socket steel pipe 20, the fastening holes 11 and the assembly holes 21 are aligned, and then tightened with the fastening members 30 to form a circular steel pipe pile member 10 ) Can be installed continuously.

Next, the circular steel pipe pile member 10 has a semi-circular alignment groove 12 formed through the center of its end, and the connecting socket steel pipe 20 has an alignment hole 22 corresponding to the alignment groove 12 at its center. ) Is formed through.

According to the above technical configuration, when inserting the connecting socket steel pipe 20 into the circular steel pipe pile member 10, when the alignment hole 22 of the connecting socket steel pipe matches the alignment groove 12 of the circular steel pipe pile member, the circular steel pipe pile The fastening hole 11 of the member and the assembling hole 21 of the connecting socket steel pipe are also naturally arranged.

Therefore, the operator can easily fasten the circular steel pipe pile member 10 and the connecting socket steel pipe 20 with the fastening member 30.

Next, the jig member 40 for fixing the connecting socket steel pipe 20 inserted into the circular steel pipe pile member 10 by being inserted into the alignment hole 22 and having both ends seated in the alignment groove 12 in a fixed position ) Is further provided.

According to the above technical configuration, when the connecting socket steel pipe 20 is inserted into the circular steel pipe pile member 10 after the jig member 40 is inserted into the alignment hole 22 of the connecting socket steel pipe, both ends of the jig member 40 are inserted. It is seated in the alignment groove 12 of the circular steel pipe pile member to make it easier to align the fastening hole 11 of the circular steel pipe pile member and the assembly hole 21 of the connecting socket steel pipe.

Of course, when the fastening operation by the fastening member 30 is completed, the jig member 40 is removed.

Next, the fastening member 30 is made of a tanned bolt 30 to prevent the circular steel pipe pile member 10 and the connecting socket steel pipe 20 from protruding to the outside in a mutually fastened state.

According to the above technical configuration, as the round steel pipe pile member 10 is connected to each other, as the tandem bolt 30 is embedded in the steel pipe of the circular steel pipe pile member 10, the resistance when pressurizing the circular steel pipe pile member 10 is reduced. It is possible to prevent damage to the fastening state.

Next, it will be described with reference to FIGS. 3 and 4.

Inside the connecting socket steel pipe 20, a stopper plate 50, which is cut at one side and bent in a circular shape, is embedded to prevent excessive insertion of the tannery bolt 30.

In the above-described technical configuration, the stopper plate 50 can be inserted into the connection socket steel pipe 20 by bending it as the one side is bent in a circular shape in an incised state, and in the inserted state, the connection socket steel pipe is expanded by its elastic force. (20) It is in close contact with the inner wall.

In addition, the stopper plate 50 may have a bent portion 51 bent inward corresponding to the assembling hole 21 of the connecting socket steel pipe, which limits the insertion depth of the headless bolt 30 when fastening the headless bolt 30 It is to do.

That is, since the headless bolt 30 does not have a head part, when fastening with a power tool, care must be taken so that the headless bolt 30 is not inserted too deeply, but the headless bolt 30 is provided at a certain depth by providing the stopper plate 50. In accordance with the resistance, it is possible to easily complete the fastening.

The following describes the construction method of the circular steel pipe pile for raising the settlement structure as an embodiment of the present invention.

The construction method of the circular steel pipe pile member of the present invention can be favorably applied to the impression method described in Patent No. 10-1559268 (registered on October 2, 2015) proposed by the present inventor.

For the purpose of raising the settlement structure according to the present invention, the method for constructing a circular steel pipe pile that is press-fitted and installed on the lower ground of the structure, first presses the circular steel pipe pile 10 into the ground.

Subsequently, the jig member 40 is inserted into the assembly hole 22 drilled in the connection socket steel pipe 20 to be fastened.

The jig member 40 is seated in the upper alignment groove 12 of the circular steel pipe pile 10 to fix the position of the connecting socket steel pipe 20 in the circular steel pipe pile 10.

Accordingly, by screwing the fastening member 30 to the fastening hole 11 of the circular steel pipe pile member in the aligned state and the assembly hole 21 of the connecting socket steel pipe, the connecting socket steel pipe 20 is connected to the upper portion of the circular steel pipe pile member 10. The lower part is integrally fastened.

In addition, the jig member 40 is removed from the connecting socket steel pipe 20.

Next, a new circular steel pipe pile member is inserted into the upper portion of the connecting socket steel pipe 20.

Thereafter, the alignment groove 12 of the end portion of the circular steel pipe pile member is positioned in the connection socket steel pipe alignment hole 22 to be aligned.

Accordingly, by screwing the fastening member 30 to the fastening hole 11 of the circular steel pipe pile member in the aligned state and the assembly hole 21 of the connecting socket steel pipe, a new round steel pipe pile member is installed on the top of the circular steel pipe pile member 10. It can be installed continuously.

The following is a test result of a circular steel pipe pile for raising the settlement structure composed of the above configuration (see FIGS. 5 to 8).

Experiment

Round steel pipe pile member: length 1,500㎜, outer diameter 101㎜, inner diameter 93㎜, thickness 4㎜

Connection socket steel pipe: length 200㎜, outer diameter 90㎜, inner diameter 82㎜, thickness 4㎜

Bending test division division

) Conversion area A
(

) Section 2nd
moment
(

)

(kN)

(mm)

(MPa)

Test1 External steel pipe 1218.93795
(L=1,500mm) 1,436,061.272 21.6 102.1 17.720 0.068
Internal connecting steel pipe 1,080.70787
(L=1,500mm) 1,001,275.844 19.987 Test2 External steel pipe 1218.93795
(L=1,500mm) 1,436,061.272 18.1 99.3 14.849 0.066 Internal connecting steel pipe 1,080.70787
(L=1,500mm) 1,001,275.844 16.748

Compressive strength test division division

) Conversion area A
(

) Elastic modulus E
(

) Load
(kN)

(MPa)

Test3 External steel pipe 1218.93795
(L=1,500mm) 120,942.31 383.3 314.45 0.0026 Internal connecting steel pipe 1,080.70787
(L=1,500mm) 137,565.38 354.67 Test4 External steel pipe 1218.93795
(L=1,500mm) 91,684.85 368.8 302.56 0.0033 Internal connecting steel pipe 1,080.70787
(L=1,500mm) 103,415.15 341.27

According to the above test results, the circular steel pipe pile for raising the settlement structure according to the present invention has sufficient flexural strength and, when compared with the nonlinear FEM analysis of the single-structured circular steel pipe pile member, despite the continuous installation structure by the connecting socket steel pipe. Since the compressive strength can be checked, it is possible to expect quality improvement as well as convenience of construction.

The above description is an example for helping the understanding of the present invention, and is not intended to limit the present invention, and can be carried out by various modifications within the scope of the matters described in the claims. It will be obvious to those who have knowledge.

10: Round steel pipe pile member
11: Fastener
12: Sorting groove
20: Connection socket steel pipe
21: Assemblyman
22: Sorter
30: fastening member
40: jig member
50: stopper plate

Claims (6)

A circular steel pipe pile that is press-fitted and installed on the ground below the structure for the purpose of raising the settlement structure,
Round steel pipe pile member made of a certain length and having a female screw fastening hole at both ends,
A connecting socket steel pipe embedded between the circular steel pipe pile members so that the circular steel pipe pile members can be connected to each other, and a female screw assembly hole perforated corresponding to the fastening hole;
A circular steel pipe pile for raising a settlement structure, characterized in that it consists of a fastening member that is screwed in a state in which the fastening hole and the assembly hole are aligned so that the circular steel pipe pile member and the connecting socket steel pipe can be integrally bound. According to claim 1,
The circular steel pipe pile member has a semi-circular alignment groove through the center of the end thereof, and the connecting socket steel pipe is a circular steel pipe pile for raising a settlement structure, characterized in that an alignment hole corresponding to the alignment groove is formed through the center. According to claim 2,
The jig member for fixing the connection socket steel pipe which is inserted through the alignment hole and has both ends seated in the alignment groove and inserted into the circular steel pipe pile member at a predetermined position is further provided. Steel pipe pile. According to claim 1,
The fastening member is a round steel pipe pile for raising the settlement structure, characterized in that the circular steel pipe pile member and the connecting socket steel pipe are made of tanned bolts to prevent the projecting to the outside in a mutually fastened state. The method of claim 4,
A circular steel pipe pile for raising the settlement structure, characterized in that a stopper plate bent in one side and circularly bent is inserted inside the connecting socket steel pipe to prevent excessive insertion of the headless bolt. In the method of constructing a circular steel pipe pile that is press-fitted and installed on the ground below the structure for the purpose of raising the settlement structure
The process of pressing a circular steel pipe pile into the ground,
The process of fastening the jig member to the assembler drilled in the connecting socket steel pipe,
Fixing the position of the connecting socket steel pipe in the circular steel pipe pile by seating the jig member in the alignment groove at the top of the circular steel pipe pile,
The process of integrally fastening the lower portion of the connecting socket steel pipe to the upper portion of the circular steel pipe pile member by screwing the fastening member to the assembly hole of the connecting socket steel pipe and the fastening hole of the circular steel pipe pile member in an aligned state,
The process of removing the jig member from the connecting socket steel pipe,
The process of inserting and placing a new circular steel pipe pile member on top of the connection socket steel pipe,
Positioning the alignment groove of the end of the circular steel pipe pile member in the connecting socket steel pipe alignment hole to align,
And a step of continuously installing a new circular steel pipe pile member on the upper portion of the circular steel pipe pile member by screwing a fastening member to the assembly hole of the circular steel pipe pile member and the connecting socket steel pipe in an aligned state. Construction method of circular steel pipe pile for structure impression.

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