JP2016528407A - Deflection prevention beam for construction of earth retaining facilities - Google Patents

Abstract

An object of the present invention is to provide a bending-preventing beam for the construction of a temporary holding facility. The present invention relates to a bend prevention beam for construction work of a retaining wall, and the bend prevention beam for work of a temporary work facility according to the present invention is arranged across a retaining wall body facing each other. The cut beam connected to the bulge of the earth retaining wall, one side is connected to the bulge, and the other side is provided on both sides of the longitudinal end of the cut beam. An inclined beam, a tension member provided on the outer side of the beam, and a tension line provided in the longitudinal direction of the beam and applying a tension force to the tension member to offset the eccentricity generated in the beam. It is characterized by that. According to the present invention as described above, it is possible to prevent the phenomenon of bending of the cut beam by providing a tension to a point where the bending of the cut beam is predicted or occurs, and to ensure the safety of the temporary earth retaining work. There is an advantage that you can. [Selection] Figure 2

Description

More particularly, the present invention relates to an anti-bending beam for construction of a temporary holding facility, and more particularly, can provide a tension to a point where the bending of the cutting beam is predicted or occurs to prevent the bending of the cutting beam. The present invention relates to an anti-deflection beam for temporary construction of earth retaining that can ensure the safety of earth retaining work.

In general, during ground excavation for subway construction and construction of structures, temporary soil retaining work is implemented as a normal method for maintaining the safety of adjacent surrounding ground by preventing landslide collapse and suppressing displacement at the back of the excavation. To do.

In particular, as construction work close to the city center has become more frequent in recent years, demands for subsidence of adjacent ground due to ground excavation and safety of surrounding buildings have risen, and this has increased the importance of temporary earth retaining work. .

Usually, the existing subway construction and the construction method when digging up to create the underground layer of a building first dig a hole along the planned plane to the design depth and install a vertical pile.

When the installation of the vertical pile is finished, the excavation is partially performed and the main girder and the lining board are installed. The construction progresses while the process is repeated.

Therefore, in order to design such a temporary facility, we repeatedly calculate the earth pressure and the load acting on the beam at each excavation stage, and install the beam so that it can withstand the maximum value. If the design and construction is done, a large number of beams will be required, and in most cases, it will be arranged very tightly within 2-3 m.

The beams arranged as described above are extremely serious obstacles that hinder the transportation of construction materials, the introduction of heavy equipment, and the construction work within the face, and this structure was subsequently installed. However, there is a serious problem in waterproofing the completed underground structure because it is inevitable that the work on the formwork and the reinforcing bar work, and it is inevitable that there will be many holes in this structure. .

For vertical piles, in addition to the temporary facility method using steel H piles, there is also a method using concrete piles in which concrete is packed after drilling holes. Steel piles and concrete piles are used in parallel, or sheet piles are used. Although there is a construction method to use, there is not much difference in the basic principle of supporting the ground load by forming a wall surface with a pile after digging a hole in the ground.

In addition, there is a method using a preflex beam as a vertical pile, and a method of increasing rigidity by attaching an H pile to a sheet pile.

On the other hand, as a temporary facility construction method for constructing an underground structure, there is a construction method in which a steel pile is supported using an earth anchor as a method without a beam mentioned above.

In this method, a steel wire or a steel rod is inserted by drilling an inclined hole in the backside ground of the pile, and the end portion of the inserted steel rod is subjected to mechanical methods, chemicals such as epoxy and cement grouting. This is a method of fixing a steel pile by tensioning a steel rod after fixing using a simple method.

The temporary facility constructed by such a method is a construction method that has an advantage that the internal space can be sufficiently secured and the difficulty of the construction is improved.

However, the biggest drawback of this method is that when this method is applied in a complex city, there is a lot of room for infringement of adjacent sites in most cases, and there is much room for construction costs. One of the big problems is that it is expensive.

In Patent Document 1 (Title of Invention: Y-type connection structure of steel pipe cut beam, registration date: 2007.03.16), it is inclined on both sides erected so that the force applied to the erection can be distributed and transmitted. Between the two steel pipe cut beams and the double steel pipe cut beam. Connected to two steel pipe cut beams and double steel pipe cut beams, and joined to the two steel pipe cut beams and double steel pipe cut beams, respectively, and contacted with the connected bodies and fastened to the connected body And a base plate to be made.

In the Y-type connection structure of steel pipe cut beams according to the conventional technology as described above, the load of the double steel pipe cut beams can be distributed to each steel pipe cut beam.

However, in areas where earth pressure is greatly generated, the double steel pipe cut beam is twisted to one side due to the load applied to the double steel pipe cut beam, which is not useful for temporary earth retaining work.

As a result, methods have been taken to increase the rigidity of double steel pipe cut beams and to connect double steel pipe cut beams in parallel, but in this case, there is a problem that the double steel pipe cut beams are inclined downward due to their own weight. It was.

Korean Registered Patent No. 10-0698878

The present invention has been made to solve the above-described problems, and its purpose is to provide a tension force at a point where the bending of the beam is predicted or occurs to prevent the phenomenon of bending of the beam. Another object of the present invention is to provide a bend-preventing beam for earth retaining temporary facility construction that can ensure the safety of temporary earth retaining works.

In order to solve the above-described problem, the anti-deformation beam for construction work of a retaining wall according to the present invention is disposed across between the retaining wall bodies facing each other, and is used to raise the abdomen of the retaining wall body. Cut beams to be connected, one side is connected to the bulge, and the other side is an inclined beam provided on both sides from the longitudinal end of the cut beam, and provided on the outside of the cut beam And a tension line provided in the longitudinal direction of the beam and applying a tension force to the tension member to offset the eccentricity generated in the beam.

In addition, the tension member may be provided on one side of the beam, or on one side and the other side.

The tension members may be spaced apart along the outer peripheral surface of the beam.

Further, the tension member is characterized in that the height increases as it goes from both ends of the beam to the center.

Moreover, the said cut beam and the said inclination beam are couple | bonded through a connection member, It is characterized by the above-mentioned.

The connecting member may be an H-beam that includes two flanges and a web provided between the flanges.

The connecting member includes a horizontal frame provided at an end portion of the beam, and an inclined frame extending from the both side end portions of the horizontal frame so as to form a triangle with the horizontal frame. To do.

In addition, both end portions of the tension line may be provided through adjacent flanges of two flanges of the horizontal frame.

In addition, both end portions of the tension line are provided so as to penetrate both the two flanges of the horizontal frame.

An L-shaped frame including a horizontal portion that contacts the horizontal frame and an inner flange or an outer flange of the inclined frame, and a vertical portion that is continuously formed at an end of the horizontal portion and contacts the web of the horizontal frame. Is included.

The horizontal portion may be longer and longer than an inner flange or an outer flange of the horizontal frame and the inclined frame, and the tension line may be provided at an exposed portion of the horizontal portion.

According to the present invention as described above, it is possible to prevent the phenomenon of bending of the cut beam by providing a tension to a point where the bending of the cut beam is predicted or occurs, and to ensure the safety of the temporary earth retaining work. There is an advantage that you can.

It is a top view which shows roughly the temporary earthing construction to which the bending prevention cut beam for earthing temporary facility construction which concerns on preferable embodiment of this invention was applied. It is a top view which shows a mode that the tension | tensile_strength member was provided in one side outer peripheral surface of the bending prevention cut beam for earth retaining temporary facility constructions concerning preferable embodiment of this invention. It is a top view which shows a mode that the tension | tensile_strength member was provided in the both-sides outer peripheral surface of the bending prevention cut beam for earth retaining temporary facilities construction which concerns on preferable embodiment of this invention. It is a top view which shows a mode that the tension | tensile_strength member was provided along the longitudinal direction at the one side outer peripheral surface of the bending prevention cut beam for earth retaining temporary facility constructions concerning preferable embodiment of this invention. It is a top view which shows a mode that the tension | tensile_strength member was provided along the longitudinal direction on the both-sides outer peripheral surface of the bending prevention cut beam for earth retaining temporary facilities construction concerning preferable embodiment of this invention. It is a figure which shows a mode that a tension | tensile_strength line is provided in the horizontal frame or the inclination flame | frame of the bending prevention cut beam for earth retaining temporary facilities construction which concerns on preferable embodiment of this invention. It is a figure which shows a mode that a tension | tensile_strength line is provided in the horizontal frame or the inclination flame | frame of the bending prevention cut beam for earth retaining temporary facilities construction which concerns on preferable embodiment of this invention. It is an exemplary view showing a method in which a tension line is provided on the horizontal frame or the inclined frame of the anti-bending beam for temporary holding facility construction according to a preferred embodiment of the present invention. It is an exemplary view showing a method in which a tension line is provided on the horizontal frame or the inclined frame of the anti-bending beam for temporary holding facility construction according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same reference numerals provided in each drawing represent the same member. In describing the present invention, specific descriptions of such well-known functions or configurations are omitted so as not to obscure the subject matter of the present invention.

The bend prevention cut beam for temporary retaining facility construction according to a preferred embodiment of the present invention includes a cut beam 100, an inclined beam 200, a tension member 300, and a tension line 400. 200 and a connecting member 500 to be described later are formed in an H-beam.

Here, the H beam will be briefly described. The H beam has a H-shaped cross section and is a member that is cut into a certain length, and includes a pair of flanges facing each other in parallel and a pair of flanges. And a web connecting the centers of the two.

FIG. 1 is a plan view schematically showing temporary earth retaining work to which a bending prevention beam for earth retaining temporary facility construction according to a preferred embodiment of the present invention is applied. The structure is such that a retaining wall body is constructed on the inner wall of the site excavated for the construction of the retaining structure having a rectangular planar structure, and the erection 10 is laterally arranged inside the retaining wall body. Provided.

Further, a cut beam 100 is provided so as to cross a long side of the inner wall excavated in a rectangular shape at right angles, and supports earth pressure transmitted from the inner wall. A pair of inclined beams 200 are prepared at both ends in the longitudinal direction of the cut beam 100 to support the erection 10 and the connecting structure in an inclined state so as to have a substantially triangular shape.

The erection 10 may be a single erection or a double erection depending on the size of the ground to be excavated.

In addition, the cut beam 100 is provided with a jack (not shown) for applying a load to both side ends of the cut beam 100 at the center in the longitudinal direction so that earth pressure transmitted from the inner wall is supported. May be.

The top view which shows a mode that the tension | tensile_strength member was provided in FIG. 2 at the one side outer peripheral surface of the bending prevention cut beam for earth retaining temporary facilities construction which concerns on preferable embodiment of this invention is shown.

As shown in FIG. 2, a tension member 300 is provided on one side of the beam 100, and the tension member 300 is provided at the center in the longitudinal direction of the beam 100.

In addition, a tension line 400 is provided in the longitudinal direction of the cut beam 100 on one outer peripheral surface of the cut beam 100. The tension line 400 is separated from the beam 100 so that the string is pulled by the tension member 300, and tension is generated while tightening the pin, and the tension is applied in the direction of the beam 100.

For example, when a displacement occurs or is predicted to occur on one side of the beam 100, if a tension member 300 and a tension line 400 are provided at the displacement occurrence point, the tension beam 300 and the tension line 400 side the beam 100 side. The displacement occurrence point can be reinforced using the tension force applied to the.

On the other hand, FIG. 3 is a plan view showing a state in which tension members 300 are provided on the outer peripheral surfaces on both sides of the bend prevention beam for construction of a temporary holding facility according to a preferred embodiment of the present invention. As shown in FIG. 3, it is possible to reinforce a point where displacement occurs on the outer peripheral surfaces on both sides of the cut beam 100 or the occurrence is concerned.

As shown in FIGS. 4 to 5, when a wide range of displacement occurs on one side or both sides of the beam 100 or the occurrence of such a risk is concerned, a plurality of tension members along the longitudinal direction of the beam 100. 300 is provided. And the tension member 300 can be pressurized with the tension line 400, and the tension force can be uniformly applied to one side or both sides of the beam 100.

Further, as described above, the plurality of tension members 300 provided along the longitudinal direction of the cut beam 100 may be provided with a certain distance therebetween. The plurality of tension members 300 have a maximum height at a point where a displacement of the cutting beam 100 is generated or predicted, and gradually decrease in height toward a point where the displacement is not generated or predicted. is there.

Thereby, this invention can apply strong tension | tensile_strength to the point which generate | occur | produces the largest displacement to the cut beam 100, or the point which generate | occur | produced. Such a tension force is characterized in that it can offset the bending due to earth pressure transmitted from the erection 10 to the cut beam 100.

In addition, by the method as described above, it is possible to cancel the occurrence of the downward inclination due to the weight of the cut beam 100.

On the other hand, as shown in FIGS. 2 to 5, inclined beams 200 are provided at both end portions of the cut beam 100. The cut beam 100 and the inclined beam 200 are connected through a connecting member 500. The connecting member 500 is connected to the horizontal frame 510 connected to the end of the cut beam 100, and at the same time connected to the horizontal frame. It is comprised from the inclination flame | frame 520 connected with the edge part of the inclination beam 200. FIG.

Both the cut beam 100 and the inclined beam 200 are formed into an H beam. Both side ends of such an H beam are cut into a flat cross section so that the cut beam 100 and the end of the cut beam 100 are cut. It is difficult to directly connect the inclined beam 200 disposed on both sides of the beam.

Accordingly, the horizontal frame 510 is vertically connected to the end of the cut beam 100, and the inclined frame 520 is connected to the end of the inclined beam 200 vertically. The horizontal frame 510 and the inclined frame 520 are formed as an H beam.

As shown in FIGS. 2 to 5, the inclined frame 520 is formed to extend from both side ends of the horizontal frame 510, and the horizontal frame 510 and the inclined frame 520 are roughly composed of It is a triangle, more precisely an isosceles triangle.

In addition, of the two side ends of the inclined beam 200, the end located on the opposite side to the end connected to the inclined frame 520, more precisely, as shown in FIG. It is preferable that another connecting member 500 ′ that plays the same role as the connecting member 500 is also provided at a portion where the joint 10 is connected.

FIGS. 6 to 7 are diagrams showing a state in which tension lines are provided on the horizontal frame or the inclined frame of the anti-bending beam for the temporary holding facility construction according to the preferred embodiment of the present invention. 6 to 7 show a state in which one side end portion of the tension line 400 is coupled, and the other side end portion of the tension line 400 is the same as the one side end portion.

The tension line 400 as described above is fixed to the horizontal frame 510 or the inclined frame 520 so that the tensioned state by the tension member 300 can be stably maintained. The tension line 400 may be connected to a horizontal frame 510 as shown in FIGS. 6 to 7, and the horizontal frame 510 and the inclined frame 520 are each formed as an H beam.

FIG. 6 shows a state where both end portions of the tension line are fixed through the flange adjacent to the cut beam 100 of the two flanges, and FIG. 7 shows both end portions of the tension line. Is shown fixed to a flange which penetrates both flanges and is spaced apart. Assuming that the lengths of the tension lines 400 in FIGS. 6 and 7 are the same, as shown in FIG. 7, the tension force of the tension lines 400 provided on the flanges F at which the tension lines 400 are spaced apart from each other. It is obvious that becomes larger.

On the other hand, FIGS. 8 to 9 show a method in which the tension line 400 in FIGS. 6 to 7 described above is provided on the flange. As shown in FIG. 8, the tension line 400 may be fixed by using another fixing member 20 after passing through the flange F.

Further, as shown in FIG. 9, an L-shaped frame 700 that abuts against one flange F (either one of an inner flange or an outer flange) and the web W is provided. Although the tension line 400 is fixed, the L-shaped frame 700 includes a horizontal portion 710 and a vertical portion 720.

The horizontal portion 710 contacts the flange F of the horizontal frame 510 and the inclined frame 520, and the vertical portion 720 contacts the web W. The horizontal portion 710 is made longer than the flange F that abuts.

As described above, when the horizontal portion 710 is made longer than the flange F, it is exposed to the outside of the flange F, and the tension line 400 may be provided in the exposed portion. In this case, the tension line 400 does not interfere with the flange F, and the tension line 400 is easy to install. And since the process of drilling the flange F is omitted, there is a feature that the time spent for installation can be remarkably reduced.

1 to 7 is a support frame, and such a support frame 30 is provided between the beam 100 and the bulge 10 and is erected from the beam 100. It plays the role of supporting the vertical load transmitted to the.

The preferred embodiments have been disclosed in the drawings and specification. Here, specific terminology has been used, but is used merely for the purpose of describing the present invention and limits the meaning of the invention as defined by the meaning and claims. It was not used for that purpose. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible from this. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the appended claims.

Claims (11)

A cross beam arranged across the earth retaining wall bodies facing each other and connected to the flank of the earth retaining wall body;
One side is connected to the bulge, and the other side is an inclined beam provided on both sides from the longitudinal end of the cut beam, and
A tension member provided on the outside of the beam,
And a tension line that is provided in a longitudinal direction of the cut beam and applies a tension force to the tension member to offset the eccentricity generated in the cut beam. . The said tension member may be provided in the one side of the said cut beam, or one side and the other side, The bending prevention cut beam for earth retaining temporary facilities construction of Claim 1 characterized by the above-mentioned. The said tension member is spaced apart by a fixed distance along the outer peripheral surface of the said beam, The bending prevention cut beam for earth retaining temporary facilities construction of Claim 1 characterized by the above-mentioned. The said tension member becomes the height which becomes so high that it goes to the center part from the both ends of the said cut beam, The bending prevention cut beam for earth retaining temporary facilities construction of Claim 3 characterized by the above-mentioned. The said prevention beam and said inclination beam are couple | bonded through a connection member, The bending prevention cutting beam for earth retaining temporary facilities construction of Claim 1 characterized by the above-mentioned. The connecting member is
6. The anti-deflection beam for earth retaining temporary facility construction according to claim 5, wherein the beam is an H-beam including two flanges and a web provided between the flanges. The connecting member is
A horizontal frame provided at an end of the beam,
7. The anti-deflection beam for temporary construction of earth retaining facilities according to claim 6, wherein the horizontal frame and the inclined frame extending in a triangle form from both side end portions of the horizontal frame are included. The bending prevention cut beam for earth retaining temporary facility construction according to claim 6, wherein both end portions of the tension line are provided through adjacent flanges of two flanges of the horizontal frame. The earth retaining beam according to claim 6, wherein both end portions of the tension line are provided so as to penetrate both flanges of the horizontal frame. An L-shaped frame including a horizontal portion that contacts the horizontal frame and an inner flange or an outer flange of the inclined frame, and a vertical portion that is continuously formed at an end of the horizontal portion and contacts the web of the horizontal frame is included. The earth retaining beam according to claim 6. The horizontal portion is made longer than the inner flange or the outer flange of the horizontal frame and the inclined frame, and is exposed.
The said tension line is provided in the exposed part of the said horizontal part, The bending prevention cut beam for earth retaining temporary facilities construction of Claim 10 characterized by the above-mentioned.

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