KR100573518B1 - A Fixing Device of Bracket Type using the Characteristic of Shear Friction for Pulling in Incremental Launching Method - Google Patents

Abstract

The present invention is a concrete superstructure using a pulling jack (110) and a pulling steel wire (120) in front of the shift in the IEL (Incremental Launching Method) method widely used in the construction of road bridges and railway bridges It is an object of the present invention to provide a bracket for IEL M pulling fixing device using shear friction characteristics as a fixing device of a segment required when applying a pulling method of pulling and extruding a box-shaped segment.

The present invention manufactures the steel bracket 130 in order to extrude the segment 30 is completed in the manufacturing shop 10 in a pulling (Pulling) method to prestressed steel bar 150 perpendicular to the bottom plate 31 of the segment (30) ) By tensioning and bonding by shear shear resistance by compressive force, ELM pulling fixing device of the present invention is a bracket 130 on the bottom plate 31 of the bottom plate segment 31 of the present invention. On the bottom plate 31 of the one-side shear friction bracket method and the segment 30 to be bonded, the pair of brackets 130 and the vertical beam 160 and the segment 30 which are vertically positioned on the rear surface of the segment The upper plate 32 is configured in a two-sided shear friction bracket system integrally formed with the upper plate fixed beam 180 is fixed to the upper surface.

The ILM pooling fixing device configured as described above has a structure change or reinforcement for the conventional ILM segment standard section in constructing a prestressed concrete box bridge in a pulling method of the ILM method. It can be installed without interference with the steel wire, it is easy to repeat the fastening and detachment of the segment, there is an advantage that can be economically and efficiently extrude the weight of the upper structure.

ILM, segment, pulling, pulling jack, pulling steel wire, fixing device for pulling, shear friction resistance

Description

A Fixing Device of Bracket Type using the Characteristic of Shear Friction for Pulling in Incremental Launching Method}

1 is a schematic view showing a bridge construction form of the overall ILM pooling method,

Figure 2 is a procedure showing the sequence of (a), (b), (c) the process of work of ILM pooling method,

Figure 3 is a process of extrusion by the pull method using the bracket type ILM pooling fixing device using the shear friction characteristics according to the first embodiment of the present invention in the order of (a), (b), (c) The procedure diagram shown,

4 is a front view of the segment shown in FIG. 3,

Figure 5 is a detailed view of the bracket installed on the bottom plate of the segment shown in Figure 4,

Figure 6 is a bottom view of the bracket shown in Figure 4,

7 is a side view of the bracket shown in FIG. 6,

FIG. 8 illustrates a process of extruding a pulling method using the bracket type ILM pooling fixing device using the shear friction property according to the second embodiment of the present invention in the order of (a), (b), (c) The procedure diagram shown,

FIG. 9 is a rear view of the segment shown in FIG. 8;

10 is a detailed view of the bracket installed on the bottom plate of the segment shown in FIG.

FIG. 11 is a side view illustrating a bracket type ILM pulling fixing device using the shear friction property shown in FIG. 8.

Explanation of symbols on the main parts of the drawings

10: production site 20: shift

30: segment 110: pulling jack

120: pulling steel wire 130: lower bracket

140: anchor block 150: prestressed steel bar

160: vertical beam 170: bearing block

180: top plate fixed beam 190: buffer material

The present invention uses a pulling method of pulling and extruding a concrete box-shaped segment, which is an upper structure, by using a pulling jack in front of an alternating method in the construction of an IEL (Incremental Launching Method) method widely used in the construction of road bridges and railway bridges. As a fixing device of the segment required in the application, it relates to a bracket type ILM pulling fixing device using the shear friction characteristics.

Figure 1 is a schematic diagram showing the bridge construction form by the overall ILM pooling method, Figure 2 is a process diagram showing the sequence of (a), (b), (c) the progress of the ILM pooling process.

In the conventional ILM pooling method, the vertical jack 41 is installed on the upper surface of the shift, and the horizontal pulling is installed in front of the shift 20 by pulling the segment 30 by the vertical jack 41 during extrusion. Pulling the segment 30 with the jack 110 is a method of construction continuously. At this time, a sliding pad 22 coated with lubricant is inserted between the segment 30 and the vertical jack 41 to minimize the friction force. At the end of every stroke of the pulling jack 110, the vertical jack 41 descends and is supported by the braking saddle 47, which is installed separately in front of the shift 20, between which the upper structure is supported. The pulling jack 110 is returned to perform the work repeatedly.

On the other hand, when installing a long bridge in the pulling method of the ILM method, the fixing device of the segment commonly used in the prior art, as shown in Figure 2, a hole 61 perpendicular to the top plate and the bottom plate of the segment 30 It has been used as acupressure method that penetrates the vertical beam 60 through this method, but this method is poor in constructability such as interference with the existing structure during installation, and the concrete acupressure surface is structurally weak, causing local defects. Therefore, the applicability of the pulling method itself is low.

As described above, when a long bridge is installed by the pulling method of the ILM method, when the segment fixing device is applied by the conventional acupressure method, the through-hole (Hole) is not small in size perpendicular to the top plate and the bottom plate of each segment. ) It is inevitable that the drill should be perforated, and the acupressure method depending on the existing segment cross section is difficult to cause defects such as cracks and deformations during construction, as well as work before and after construction, and cut them by interference with existing rebars and steel wires. A separate cross section reinforcement is required, and it is very disadvantageous not only in terms of maintenance but also in durability of the bridge. Therefore, the present invention was invented to make an efficient fixing device of the segment in the application of the ILM pooling method, secured for efficient and efficient ILM pooling of the bracket type using the shear friction characteristics that can advance the segment of excessive weight The object is to provide a device.

The present invention for achieving the above object is a pulling jack (Pulling Jack) in the construction of the bridge of the IEL (Incremental Launching Method) method for extruding the segment produced in the manufacturing site located in the rear of the shift in front of the shift In the pulley of the bracket type IEL M pooling fixing device using the shear friction characteristics when the pulling method applied to pull the concrete box-shaped segment of the bridge upper structure from the front using a pulling method, the bottom plate of the segment It is characterized by including a lower bracket for fixing the prestressed steel bar in contact with the lower surface of the.

In addition, according to the present invention, in the bracket type ILM pulling fixing device using the shear friction characteristics, the vertical beam positioned perpendicular to the back of the segment, and fixed to the upper end of the vertical beam upper surface of the segment It is characterized in that it comprises a top bracket fixed by tension with a prestressed steel bar, and two bottom brackets fixed to the bottom of the vertical beam and in contact with the upper and lower surfaces of the bottom plate of the segment and fixed by tensioning the prestressed steel bars.

In addition, it is preferable that a cushioning material is positioned between the lower bracket of the present invention and the vertical beam.

In the following, with reference to the accompanying drawings, preferred embodiments of the bracket type IEL pooling fixing device using the shear friction characteristics according to the present invention will be described in detail.

[First Embodiment]

In the drawings, Figure 3 is a (a), (b), (c) the extrusion process using the bracket type IEL M pooling fixing device using the shear friction characteristics according to the first embodiment of the present invention 4 is a front view of the segment shown in FIG. 3, FIG. 5 is a detailed view of the bracket installed on the bottom plate of the segment shown in FIG. 4, and FIG. 6 is a view of the bracket shown in FIG. 4. It is a bottom view, and FIG. 7 is a side view of the bracket shown in FIG.

As shown in FIGS. 3 to 7, in the traveling direction of the segment 30, two pulling jacks 110 are installed at both front sides of the shift 20, and are formed from the front of the shift 20 to the rear side. Pulling steel wire 120 for extrusion is located in the two through-holes 21, and the front end of the steel wire 120 is fixed to each of the pulling jack 110, the rear end of the segment 30 produced in the fabrication site (10) The bottom plate 31 of the bottom plate 31 is fixed to the bottom bracket 130, wherein the rear end of the steel wire 120 is coupled to the wedge (Wedge) to the anchor block 140 to form a fixed point during extrusion.

On the other hand, the installation of the lower bracket 130 is fixed to the bottom plate 31 of the concrete box-shaped segment 30 by a prestressed steel bar 150. As the lower bracket 130 is in contact with the lower surface of the segment 30 and the prestressing force is introduced and fixed, shear friction resistance between the segment 30 and the lower bracket 130 is generated, thus pulling in such a state. Pulling the steel wire 120 with the jack 110, the segment 30 is pushed forward by the horizontal thrust force applied to the steel wire 120, that is, is pushed forward. At this time, the temporary pier 20a installed in the fabrication site 10 and the upper surface of the point of the pier are inserted with a sliding pad 22 coated with a lubricant to smoothly reduce the friction force in the extrusion of the segment 30. Allow you to move forward.

Looking at the lower bracket 130 in more detail, the lower bracket 130 is perpendicular to the bracket plate 131 and the lower surface of the bracket plate 131 in contact with the bottom plate 31 of the segment 30. The reinforcement plate 133 is welded at a predetermined interval in the segment length direction, and the ribs 135 fixed to the outer side of the reinforcement plate 133 and the lower surface of the bracket plate 131. The through plate 131H is formed in the bracket plate 131 between the ribs 135 so that the prestressed steel bar 150 penetrates. Meanwhile, the through plate 31H is formed at the bottom plate 31 of the segment 30 at a point corresponding to the through hole 131H formed in the bracket plate 131, and the steel bar 150 penetrates the bracket plate 131. The prestressed steel bar 150 is tensioned while passing through the hole 131H and the through hole 31H formed in the bottom plate 31 of the segment 30, and thus the lower bracket ( 130) is fixed.

Pulling the steel wire 120 forward by operating the pulling jack 110 in this state, the steel wire 120 is tensioned and the force generated from the pulling jack 110 is a lower bracket (a fixing device for pulling by the steel wire 120) 130 is extruded forward to the segment 30 fixed to the lower bracket 130.

As described above, in constructing the long bridge using the ILM method, the manufactured segment 30 uses the pulling jack 110, the pulling steel wire 120, and the lower bracket 130 and the steel bar 150, which are fixing devices for pulling. By doing so, it can be extruded safely and easily.

Second Embodiment

In the fixing device for pulling in the second embodiment, the lower bracket is fixed in pairs on the bottom and bottom of the segment bottom plate, and a bearing block is used so that the load is transmitted to the upper and lower brackets by using a vertical beam on the rear surface of the segment. By fabricating 170, it is the same as or similar to the first embodiment except that it has a greater shear frictional resistance than the first embodiment. Therefore, the same or similar components will be omitted, and the same or similar reference numerals are given.

In the drawings, Figure 8 is a (a), (b), (c) the extrusion process using the bracket type IEL M pooling fixing device using the shear friction characteristics according to the second embodiment of the present invention 9 is a rear view of the segment shown in FIG. 8, FIG. 10 is a detailed view of the bracket installed on the bottom plate of the segment shown in FIG. 9, and FIG. 11 is the front end shown in FIG. 8. This is a side view showing a bracket type ILM pulling fixture using friction characteristics.

As shown in FIGS. 8 to 11, a pair of bottom brackets 130 are spaced apart by the thickness of the bottom plate 31 of the segment 30 at the bottom of the vertical beam 160 positioned on the rear surface of the segment 30. The plate 131 of the lower bracket 130 is in contact with the upper and lower surfaces of the bottom plate 31 of the segment 30, respectively, and the prestressed steel bar 150 is disposed between the reinforcing bars and the steel wires embedded in the segment. The plate 131 and the bottom plate 31 of the segment 30 penetrate and are fixed on the bracket plate 131.

As described above, the pair of lower brackets 130 are fixed to the upper and lower surfaces of the bottom plate 31 of the segment 30, thereby improving twice as much as the segment 30 to which one lower bracket is fixed as in the first embodiment. Shear friction resistance Therefore, the capacity of the pulling jack 110 may be improved to pull the segment 30 with a greater force.

On the other hand, the top fixed beam 180 is fixed to the upper surface of the top plate 32 of the segment 30 is fixed to the upper end of the vertical beam 160, the top plate fixed beam 180 and the top plate 32 of the segment 30 in front It is fixed to the tensioned steel rods 150 as described. And the steel wire 120 is coupled to the wedge (Wedge) to the anchor block 140 in the state passing through the vertical beam 160 through the lower bracket 130 fixed to the bottom plate 31 of the segment 30. .

It is preferable that a rubber buffer material 190 is interposed between the vertical beam 160 and the upper plate fixed beam 180 and between the vertical beam 160 and the lower bracket 130.

Therefore, as shown in FIG. 8, when using a pulling fixture having a pair of lower brackets 130, there is an advantage in that it is easier to construct a bridge of longer extension than the first embodiment.

As described in detail above, the bracket-type ILM pulling fixing device using the shear friction characteristics of the present invention, when constructing a long bridge, the upper structure of the bridge segment and the fixing device for pulling fixed to such a segment The shear friction resistance can be used to easily extrude a weight segment.

In addition, the bracket type IEL M pooling fixing device using the shear friction characteristics of the present invention by installing the bottom bracket in the form of a pair on the bottom plate of the segment, thereby improving the resistance to the two-sided shear friction effect required for extruding the segment Larger weight segments can be easily extruded.

In addition, the high suiting device for IEL M pooling of the bracket type using the shear friction characteristics of the present invention can be used as it is without changing the structure of the conventional ILM segment standard or interference with reinforcing bars and steel wires, and fastening and separating the segment It is easy to use, and it is also advantageous in terms of stability during construction, workability before and after construction, and maintenance. If it is not the pooling fixing device of the present invention, the acupressure method in which a vertical hole is drilled vertically through the top plate and the bottom plate in the segment and penetrates the vertical beam is severely cracked or deformed during construction, and it is difficult to perform work before and after construction. In addition, it is necessary to cut them due to interference with existing reinforcing steel and steel wires, or require a separate cross-section reinforcement, which is very disadvantageous in terms of maintenance and durability of the bridge.

Although the technical details of the bracket-type ILM pooling fixing device using the shear friction characteristics of the present invention have been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention, which limits the present invention. It is not.

Claims (3)

In the construction of the bridge by the IEL (Incremental Launching Method) method, which extrudes the manufactured segment at the rear of the shift to the front of the bridge, the concrete, which is the upper structure of the bridge from the front, using a pulling jack. In the bracket type ILM pulling fixture using the shear friction characteristics as a segment fixing device when a pulling method of pulling and extruding a box-shaped segment, Bracket type IEL pooling fixing device using the shear friction characteristics, characterized in that it comprises a bottom bracket for tensioning and fixing the prestressed steel bar in contact with the bottom of the bottom plate of the segment. In the construction of the bridge by IEL (Incremental Launching Method) method, which extrudes the manufactured segment at the rear of the shift to the front of the shift, concrete is used as a superstructure of the bridge from the front using a pulling jack. In the bracket type ILM pulling fixture using the shear friction characteristics as a segment fixing device when a pulling method of pulling and extruding a box-shaped segment, A vertical beam positioned perpendicular to the back of the segment, An upper bracket fixed to an upper end of the vertical beam and fixed by tensioning a prestressed steel bar 150 on an upper surface of the segment; Fixing device for ILM pooling using the bracket type shearing characteristics characterized in that it is fixed to the bottom of the vertical beam and the bottom plate of the segment is fixed in contact with each of the upper and lower surfaces of the segment by tensioning the prestressed steel bar. The method of claim 2, Bracket type ILM pooling fixing device using the shear friction characteristics, characterized in that the cushioning material is located between the lower bracket and the vertical beam.

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