WO2010110577A2

WO2010110577A2 - Self-supporting retaining wall construction using a curved steel panel and a steel wire

Info

Publication number: WO2010110577A2
Application number: PCT/KR2010/001769
Authority: WO
Inventors: 김성환
Original assignee: 주식회사 장원기술단
Priority date: 2009-03-24
Filing date: 2010-03-23
Publication date: 2010-09-30
Also published as: KR100924104B1; WO2010110577A3

Abstract

The aim of the present invention is to provide a self-supporting retaining wall construction using a curved steel panel and a steel wire, comprising: two or more furring strip mounting elements inserted into a flange of an H-pile for supporting a plurality of soil-retaining plates of the retaining wall construction such that compression forces from a prestress furring strip can be applied to side surfaces of the furring strip mounting elements; and one or more prestress furring strips, each of which has an arc shape and is arranged between two adjacent furring strip mounting elements to compress each furring strip mounting element from the right or left side through the tension force applied to one or more tension wires inserted therein. The above-described self-supporting retaining wall construction can quickly deal with sudden soil pressure deformation, and is configured such that interference between a structure and the furring strip is reduced so as to improve constructability. Further, the self-supporting retaining wall construction of the present invention can be installed and dismantled in a simple manner without particular expertise, and, when installed, can block obstacles which might otherwise cause inconveniences in working underground, and can eliminate a strut to ensure the operation and the safety of a drilling machine.

Description

Self-supporting temporary facility using flexural steel panel and steel wire

The present invention provides a self-supporting temporary facility using flexural steel panels and steel wires installed in the ground during the construction period to prevent the collapse of the excavated ground by providing a compressive force to the H-ply supporting the earth plate through the prestressing band when constructing the underground structure It is about.

Nationwide, land costs include a significant amount of construction costs. Therefore, modern buildings are getting taller and grander in order to secure the maximum space within a certain area. As the building grows, the underground structure also deepens, and the excavation work conditions take a large part of the construction period and cost.

When excavation, temporary facilities (H-beam, earth plate) are used. Usually, props (H-beam) form a shape that supports the earth wall, and excavate step by step. When excavating to the plan surface, it is dismantled step by step while building the building.

In this case, the prop supporting the earth wall (H-beam) crosses the excavation space, which in turn hinders the work speed and safety.However, in the case of deep excavation, it is necessary to use the prop to distribute the load on the earth wall. In most cases.

In order to solve this problem, the hypothesis method (IPS method) was developed so that the tensile force of prestressed PC strands by placing the PC strands and short pedestals similar to the moment shape is resisted to the load and displacement by the compressive force of earth pressure. However, there is a problem in that it is difficult to quickly respond to unexpected displacements and lacks workability due to interference between the structure and the band vertical member.

In addition, a method of arranging load transfer braces and reaction bands similar to the moment shape with PS steel wires and feeding the design control values through measurement, and automatically adjusts the stroke with Jack, and offsets and recovers displacement. However, there is a problem that requires precise design management and construction management for information construction.

In addition, after the excavation step by step, a method of installing a general bandage PSII-Beam between the brace and the brace and prestressing the jack with a brace to tension the PSII-Beam to resist earth pressure (PS mud) is proposed. There is a problem in that it is difficult to apply when a large axial force occurs because the axial force of the brace is limited.

In addition, a method is proposed in which anchors are installed in the pile pile backing soil, and a tensile part is formed on the side of the pile pile to resist the tensile force by the frictional resistance of the anchor installed in the ground soil (ground anchoring technique). There is a problem that the design anchoring force is unknown.

The present invention has been made to solve the above problems, and more specifically, two or more girder coupling is inserted into the flange of the H-pile supporting a plurality of earth plate of the provisional equipment is applied to the side by the prestressed girdle phrase; And one or more prestressed strips formed in an arc shape and mounted between two adjacent stripe couplers to compress each stripe coupler on the right or left side through a tensile force applied to one or more tensile steel wires inserted therein; It is an object of the present invention to provide a self-supporting temporary facility using a flexible steel panel and steel wire.

The self-supporting temporary facility using the flexural steel panel and steel wire of the present invention for achieving the above object is inserted into two of the H pile (2) of the plurality of H piles intruding into the ground during the excavation of the ground to withstand the soil pressure In the temporary facility composed of the earth plate 6 of the present invention, it is inserted into the flange 4 of the H pile 2 and fixed at a predetermined position on the H pile 2, and the side surface thereof is prevented by the prestressed strip 40. Two or more belt-length couplers 10 receiving a compressive force C; And the band through the tensile force applied to one or more tensile steel wire 46 inserted into the inside is bent between two of the two strips coupler 10 adjacent to each other of the two or more strips coupler, the arc shape toward the front At least one prestressing strip 40 for compressing each of the couplers 10 at the right or left side; It is characterized by including.

Each of the left or right stripe coupler (10a, 10b) of the two or more stripe coupler 10, the support plate 12 receives the compressive force (C) from the web (20); The flange 4 of the H-pile 2 is formed at the left and right ends of the support plate 12 toward the rear of the support plate 12 so that the flange 4 of the H pile 2 is connected to the coupling groove ( 18 is inserted into the flange, the flange coupling portion 14 for applying the compression force (C) received from the support plate 12 to the H pile (2); One or more side steel wire holes 22 are formed to face forward from the front surface of the support plate 12 so that the tensile steel wire 46 penetrates both sides thereof, and an end of the prestressed strip 40 is formed on the side surface. The web 20 while being fixedly mounted to transfer the compression force (C) to the support plate 12; And at least one front steel wire hole 28 formed to protrude from the front left or right side of the web 20 to penetrate the tensile steel wire 46 from the rear to the front of the web 20. Left or

right flanges

24 and 26 fixing one end; It is characterized by including.

The left or

right flanges

24 and 26 may include one or more pin grooves 30 formed in a shape corresponding to the fixing pin 32 along the inner side from the rear inner side to the front inner side; And at least one of the tensile steel wire 46 penetrating the front steel wire hole 28 and then closely inserted between the tensile steel wire 46 and the pin groove 30 to fix the tensile steel wire 46. Fixing pins 32; It is characterized by further comprising.

At least one of the two or more belt-length couplers 10, the connection strip-length coupler 10c may include: the support plate 12 receiving the compressive force from the web 20; In each of the left and right ends of the support plate 12, the engaging groove 18 having a "c" shape toward the rear of the support plate 12 is formed, so that the flange 4 of the H pile 2 is The flange coupling portion 14 is inserted into the coupling groove 18; And at least one side steel wire hole 22 formed toward the front from the front surface of the support plate 12 so that both sides of the tensile steel wire 46 pass therethrough, and the prestressed strip 40 on the side surface. While the end of the fixed is mounted, the web 20 for transmitting the compression force (C) to the support plate 12; It includes, characterized in that located between the left or right stripe coupler (10a, 10b).

The two or more strip-shaped couplers 10 further include an elastic compression plate 34 attached to a rear surface of the support plate 12; The flange (4) of the H pile (2) and the elastic compression plate (34) are inserted into the coupling groove (18) of the flange coupling groove (18); It features.

The web 20 has a front narrower than the rear; And at least one inclined side 36 inclined toward the front; It is characterized by including.

The prestressed strip 40 is curved in an arc shape, the support panel 42 is fixedly mounted between the two adjacent strips coupler (10); Tensile steel wire 46 is formed in the at least one steel wire insertion groove formed in the front of the support panel 42 or the inner side of the support panel 42 so as to penetrate from one side of the support panel 42 to the other side. One or more wire insertion holes 44; And the tensile steel wire 46 which is inserted into the support panel 42 and receives a tensile force, and provides a force F for pushing the support panel 42 toward the front surface of the earth plate 6 by the tensile force. of; It includes, characterized in that each of the belt-length coupler 10 is compressed on the right or left side by the pushing force (F).

According to the present invention as described above, when the displacement of the unexpected earth pressure can be quickly responded, there is an effect of improving the workability due to less interference between the structure and the band.

In addition, the installation and dismantling of the temporary facility is simple, so that even the unskilled person can be installed. When installing the temporary facility, the obstacles can be excluded so that there is no problem in the underground space, and the operation of the excavation equipment can be guaranteed by removing the braces. have.

1 is a perspective view showing an installation state of a self-supporting temporary facility using a flexural steel panel and a steel wire which is an embodiment of the present invention.

2 is a cross-sectional view and a partially enlarged view of a band-coupled coupler according to a self-supporting temporary installation using a bending steel panel and a steel wire which is an embodiment of the present invention,

Figure 3 is a side view of the band coupler according to the self-supporting temporary installation using a flexural steel panel and a steel wire which is an embodiment of the present invention.

Figure 4 is a front view of the band coupler according to the self-supporting temporary installation using the flexural steel panel and the steel wire which is an embodiment of the present invention.

Figure 5 is a perspective view showing the installation state of the connecting strips coupler according to the self-supporting temporary installation using the flexural steel panel and the steel wire which is an embodiment of the present invention.

6 is a cross-sectional view showing an installation state of the connecting strip coupler according to the self-supporting temporary installation using the bending steel panel and the steel wire which is an embodiment of the present invention.

Figure 7 is an enlarged cross-sectional view showing the installation state of the connecting strips coupler according to the self-supporting temporary installation using the bending steel panel and the steel wire which is an embodiment of the present invention.

8 is a plan view of a prestressed strip according to a self-supporting temporary installation using a flexural steel panel and a steel wire which is an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

Referring to Figure 1, the present invention is a temporary facility composed of a plurality of earth plate 6 is inserted into the two of the H pile 2 of the plurality of H piles intruding into the ground during the excavation of the ground to withstand side pressure Two or more belt couplers that are inserted into the flange 4 of the H pile 2 and fixed at a predetermined position on the H pile 2 and whose side surfaces are subjected to a compressive force C by the prestressed strip 40. 10); And the band through the tensile force applied to one or more tensile steel wire 46 inserted into the inside is bent between two of the two strips coupler 10 adjacent to each other of the two or more strips coupler, the arc shape toward the front At least one prestressing strip 40 for compressing each of the couplers 10 at the right or left side; It is characterized by including.

The present invention is composed of a combination of the support panel 42 and the tensile steel wire 46, the role of the brace, it is possible to detail the force of the back soil coming out by applying a compressive force to the earth plate (6). Therefore, it is able to withstand the back soil and can be equipped with a stable temporary facility, and accordingly it can be carried out safe and rapid underground construction.

As shown in Fig. 1, the left or

right stripe coupler

10a, 10b for applying a compressive force C to the H pile 2 is provided in the two H piles 2.

right flanges

24 and 26 fixing one end; It may include.

In order to receive the compressive force C from the prestressed strip 40, the strip coupler 10 is preferably made of steel.

As shown, the support panel 42, which is curved in an arc shape, is restored to a flat plate due to the tensile force applied to the tensile steel wire 46, which is provided with three pieces.

Due to the restoring force (R) as shown in this process, the prestressed strip 40 pushes the stripe coupler 10, and the prestressed stripe 40 pushes the stripe coupler 10 (F). The force distributed vertically toward the H pile 2 becomes the compression force C.

When the compressive force (C) pushes the H pile (2), at the same time the earth plate (6) is also directed toward the rear soil 8, the compressive stress (S) for compressing the rear soil 8 is generated.

Each of the left or

right stripe coupler

10a, 10b is fixed to the H pile 2 through the flange coupler 14 before the prestressed stripe 40 is mounted on the stripe coupler 10. It must be fitted.

As shown in the drawing, the support plate 12 has a smooth surface corresponding to the front surface of the H-pile 2 and receives the compressive force C generated through the prestressed strip 40 to receive the flange coupling part. (14) and the front of the H pile (2).

In this case, the support plate 12 generates and applies the compressive stress smaller than the compressive stress generated in the web 20 to the H pile 2, thereby preventing the H pile 2 from being locally destroyed. There is an advantage to this.

The rear end portion 16 of the flange coupling portion 14 is closely inserted between the front surface of the earth plate 6 and the rear surface of the flange 4, the compressive force transmitted from the support plate 12 and the flange 4 (C) is applied to the earth plate (6) to generate the compressive stress (S). In this case, the coupling groove 18 is preferably formed in a shape corresponding to the thickness of the flange (4).

In addition, as shown in Figures 2 to 4, when the elastic compression plate 34 is installed between the rear of the support plate 12 and the front of the H-pile 2, the transfer to the support plate 12 A compression force C may be applied to the H pile 2 through the elastic compression plate 34. Of course, the coupling groove 18 is provided in a shape corresponding to the thickness of the flange 4 and the elastic compression plate 34 combined.

The shape of the web 20 may be provided with three side steel wire holes 22 provided in a plate shape and penetrating both sides of the plate.

Each of the tensile steel wires 46 extending from the prestressed strip 40 passes through the side steel wire holes 22.

When the prestressed strip 40 is mounted on the left and right sides of each of the two webs 20 facing each other, the left and right sides receive the pushing force F from the prestressed strip 40 and thus the compression force C. Is distributed to the support plate 12 to be delivered to the support plate 12.

The left or

right flanges

24 and 26 capable of fixing both ends of the tensile steel wire 46 may be formed on opposite sides of the web 20 on which one end of the prestressed strip 40 is mounted. have.

The tensile steel wire 46 penetrating the side surface of the web 20 may pass through the front steel wire hole 28 and may be fixed at the front end portion of the strip-shaped coupler 10.

In addition, one or more fixing pins 32 may be provided to fix the tensile steel wire 46 more firmly to strengthen the binding force between the tensile steel wire 46 and the right flange 26.

To this end, the left or

right flanges

24 and 26, the front steel wire hole 28 is formed in a shape corresponding to the fixing pin 32 along the inner surface from the rear inner side to the front inner side (30) ); And at least one of the tensile steel wire 46 penetrating the front steel wire hole 28 and then closely inserted between the tensile steel wire 46 and the pin groove 30 to fix the tensile steel wire 46. Fixing pins 32; It may be further provided.

2 to 4, it can be seen that the pin groove 30 and the fixing pin 32 are mobilized three. Of course, the number of the pin groove 30 and the fixing pin 32 is not limited to the above.

5 is a perspective view showing the installation state of the connecting strips coupler according to the self-supporting temporary facility using a flexible steel panel and a steel wire of one embodiment of the present invention, Figure 6 is a self-supporting temporary facility using a flexible steel panel and steel wire of an embodiment of the present invention Figure 7 is a cross-sectional view showing the installation state of the connection strip coupler according to Figure 7, Figure 7 is an enlarged cross-sectional view showing the installation state of the connection strip coupler according to the self-supporting temporary installation using the flexural steel panel and steel wire of an embodiment of the present invention.

5 to 7, at least one of the at least one connection strip coupling unit 10c of the two or more strip coupling units 10 includes: the support plate 12 receiving the compressive force from the web 20; In each of the left and right ends of the support plate 12, the engaging groove 18 having a "c" shape toward the rear of the support plate 12 is formed, so that the flange 4 of the H pile 2 is The flange coupling portion 14 is inserted into the coupling groove 18; And at least one side steel wire hole 22 formed toward the front from the front surface of the support plate 12 so that both sides of the tensile steel wire 46 pass therethrough, and the prestressed strip 40 on the side surface. While the end of the fixed is mounted, the web 20 for transmitting the compression force (C) to the support plate 12; It includes, and may be located between the left or right stripe coupler (10a, 10b).

As shown in the drawing, three connecting strips are connected to each other. In this case, the support plate 12, the flange coupling portion 14 and the web 20 may have the same configuration as the support plate, the flange coupling portion and the web of the left or right stripe coupler (10a, 10b).

The tensile wire passes through the side stiffness hole of the web and passes through the lateral liner hole of another adjacent stripe coupler as shown, and then is fixed at the left or right stripe coupler.

In addition, as shown, the left or right flange may be formed to protrude to the front left or right of the web 20.

The connecting strip coupling unit 10c may be installed between the left or right

strip coupling unit

10a, 10b to withstand the rear soil 8 of the general section.

The two or more strip-shaped couplers 10 further include an elastic compression plate 34 attached to a rear surface of the support plate 12; The flange 4 and the elastic compression plate 34 of the H pile 2 may be inserted into the coupling groove 18 of the flange coupling groove 18.

The elastic compression plate 34 may be provided in a plate shape formed of the rear surface of the support plate 12 and the inner surface of the flange coupling portion 14.

The elastic compression plate 48 is preferably made of a rubber plate to mitigate the impact of an unexpected external force that can be applied to the prestressed strip 40.

Since the coupling groove 18 should be inserted into the flange 4 and the elastic compression plate 34 of the H pile 2, a groove larger than the case where only the flange 4 is inserted should be formed. do.

The web 20 has a front narrower than the rear; And at least one inclined side 36 inclined toward the front; It may include.

The size of the compression force C by the pushing force F may be adjusted by adjusting the inclination angle of the inclined side 36 on which both ends of the support panel 42 are mounted.

The prestressed strip 40 is curved in an arc shape, the support panel 42 is fixedly mounted between the two adjacent strips coupler (10); Tensile steel wire 46 is formed in the at least one steel wire insertion groove formed in the front of the support panel 42 or the inner side of the support panel 42 so as to penetrate from one side of the support panel 42 to the other side. One or more wire insertion holes 44; The tensile steel wire 46 is inserted into the support panel 42 and is subjected to a tensile force, and provides a force F for pushing the support panel 42 toward the front surface of the earth plate 6 by the tensile force. ; And, each of the belt-length couplers 10 may be compressed on the right or the left side by the pushing force F.

As shown in FIG. 8, the support panel 42 may be formed in an arc shape having a constant curvature. In this case, the support panel 42 is preferably made of a material having an elastic force that can be developed by the tensile force of the tensile steel wire 46, if it is produced in advance in the form of a curve inserted.

In addition, the support panel 42 may be made of a material that can be bent in an arc shape while being mounted between the strip coupling device (10). In this case, it is preferably composed of a material having an elastic force that can be curved into the arc.

In this case, the material of the support panel 42 is made of a steel plate, it is preferable to prevent the tensile steel wire 46 from derailing.

The support panel 42 is to be stretched toward the front of the earth plate 6 together with the tensile wire by the property of the tensile steel wire 46 to be unfolded to the front surface of the earth plate 6 by the tensile force of the tensile steel wire 46. While pushing the belt coupler 10.

In order to allow the support panel 42 to be easily mounted on the strip coupling unit 10, both ends of the support panel 42 may be cut inclined by r 'as shown from the side end of the back toward the front center. Can be. Through this, the pushing force (F) can be easily transmitted in the inclined direction to the web 20 of the belt-length coupler (10).

As shown, three steel wire insertion holes 44 may be provided to insert three tensile steel wires 46. In this case, the tensile steel wire 46 may be fixed in the wire insertion hole 44, the fixing method may be mobilized by conventional techniques.

The means for applying the tensile force to the tensile steel wire 46 may employ a conventional steel wire tensioning machine.

The prestressed strip 40 may be installed in steps of about 1.6M after cutting.

The present invention has been described with reference to the preferred embodiment as described above, but is not limited to the above embodiment, it should be interpreted by the appended claims. In addition, various modifications and variations may be made by those skilled in the art within the equivalent scope of the technical concept of the present invention and the appended claims.

Claims

In the temporary facility composed of a plurality of earth plate (6) which is inserted into two of the H pile (2) intruding into the ground at the time of the ground excavation to withstand side pressure

Two or more strap couplers which are inserted into the flange 4 of the H pile 2 and fixed at a predetermined position on the H pile 2, and whose side surfaces are subjected to a compressive force C by the prestressed strip 40. 10; And

The strip is coupled to the front through the tension applied to the one or more tensile steel wire 46 is inserted in the inner side between the two stripe coupler (10) adjacent between the two or more stripe coupler One or more of the prestressed strips 40 compressing each of the spheres 10 on the right or left side; Self-supporting temporary facility using a flexural steel panel and steel wire, characterized in that it comprises.
The method of claim 1,

Each of the left or right stripe coupler 10a, 10b of the two or more stripe coupler 10,

A support plate 12 receiving the compressive force C from the web 20;

The flange 4 of the H-pile 2 is formed at the left and right ends of the support plate 12 toward the rear of the support plate 12 so that the flange 4 of the H pile 2 is connected to the coupling groove ( 18 is inserted into the flange, the flange coupling portion 14 for applying the compression force (C) received from the support plate 12 to the H pile (2);

It is formed toward the front from the front of the support plate 12, and has one or more side steel wire hole 22 formed to penetrate both sides of the tensile steel wire 46, the end of the prestress strip 40 The web 20 is fixedly mounted while transmitting the compression force (C) to the support plate 12; And

One or more of the tensile steel wire 46 is provided to protrude on the front left or right of the web 20, having one or more front steel wire hole 28 formed to penetrate the tensile steel wire 46 from the rear to the front surface. Left or right flanges 24 and 26 fixing the stages; Self-supporting temporary facility using a flexural steel panel and steel wire, characterized in that it comprises.
The method of claim 2,

The left or right flanges 24 and 26 are

The front steel wire hole 28 is one or more pin grooves (30) formed in a shape corresponding to the fixing pins 32 along the inner surface from the rear inner side to the front inner side; And

After the tensile steel wire 46 passes through the front steel wire hole 28, one or more of the fixing wires inserted between the tensile steel wire 46 and the pin groove 30 to fix the tensile steel wire 46. Pin 32; Self-supporting temporary facility using a flexural steel panel and steel wire, characterized in that it further comprises.
The method of claim 2,

At least one of the two or more belt-length couplers 10, the connection strip length coupler (10c),

A support plate 12 receiving the compressive force from the web 20;

In each of the left and right ends of the support plate 12, the engaging groove 18 having a "c" shape toward the rear of the support plate 12 is formed, so that the flange 4 of the H pile 2 is A flange coupling part 14 inserted into the coupling groove 18; And

It is formed toward the front from the front of the support plate 12, having at least one side steel wire hole 22 formed to penetrate both sides of the tensile steel wire 46, the end of the prestressed strip length 40 on the side Is fixedly mounted, the web 20 for transmitting the compressive force (C) to the support plate 12; Including,

Self-standing furniture using a flexural steel panel and a steel wire, characterized in that located between the left or right stripe coupler (10a, 10b).
The method of claim 4, wherein

The two or more belt-length coupler 10,

An elastic compression plate 34 is further attached to a rear surface of the support plate 12;

The flange (4) of the H pile (2) and the elastic compression plate (34) are inserted into the coupling groove (18) of the flange coupling groove (18); Self-supporting temporary facility using flexural steel panel and steel wire.
The method of claim 4, wherein

The web 20 is

Narrower front than rear; And

One or more inclined sides 36 inclined toward the front; Self-supporting temporary facility using a flexural steel panel and steel wire, characterized in that it comprises.
The method of claim 4, wherein

The prestressed strip 40 is,

Curved in an arc shape, the support panel 42 is fixedly mounted between two adjacent strip-length coupler (10);

Tensile steel wire 46 is formed in the at least one steel wire insertion groove formed in the front of the support panel 42 or the inner side of the support panel 42 so as to penetrate from one side of the support panel 42 to the other side. One or more wire insertion holes 44; And

The tensile steel wire 46 is inserted into the support panel 42 and applied with a tensile force, and provides a force F for pushing the support panel 42 toward the front surface of the earth plate 6 by the tensile force. ; Including,

A self-supporting temporary facility using a flexural steel panel and a steel wire, characterized in that each of the belt-length coupler 10 is compressed on the right or left side by the pushing force (F).