KR20150117833A - Non-Exposed Eengineering Method of Last Concreat for Expansion Joint - Google Patents

Abstract

The present invention relates to a post-concrete non-exposed method for an expansion joint device. The present invention comprises the steps of: crushing concrete and asphalt concrete pavement in a periphery of an existing expansion joint device to be removed; welding and fixating a main steel bar and the reinforced steel bar and section steel to the main steel bar of an upper slab of a left side and the right side; and applying post-concrete. The post-concrete comprises the steps of: forming a front end coupling groove; forming a buffer space and forming the surface layer space and forming the rear end coupling groove; installing a water pipe in the buffer space; applying the heating type polymer asphalt concrete to the buffer space; and applying the surface layer polymer asphalt concrete to construct. According to the present invention, the present invention is capable of securing durability of an expansion joint device and improving smoothness of the expansion joint device.

Description

Technical Field [0001] The present invention relates to a method of exposing concrete to a concrete structure,

More particularly, the present invention relates to a method of exposing concrete to an after-concrete joint of an expansion joint, more specifically, It is possible to reduce the deterioration speed and to fundamentally prevent the damage caused by the external impact, thereby securing the durability of the expansion joint device, The present invention relates to a non-exposed concrete method for an expansion joint device capable of improving flatness.

Generally, the joint between the slab plates of a structure having a connection structure, such as a bridge, an overpass, a three-dimensional intersection, and an underground driveway, undergoes expansion and contraction during rotation due to temperature change, creep, The expansion joint device is installed.

These expansion joints compensate for the disturbance so as to make it easier for the vehicle to pass smoothly, and to prevent the storm from entering the substructure, thus preventing the aging of the bridge. Also, almost all of the expansion joints have been used as rubber materials before the above-mentioned steel type expansion joint device has been developed, and it has been possible to accommodate from a small expansion amount to a large expansion amount from the 90's The steel type expansion joint device with mechanical mechanism was imported and developed in Korea, and the application of the rail type expansion joint device was rapidly increased. As a result, most of the new bridges currently use rail type expansion joints.

In bridge, etc., the after concrete of the expansion joint is a part for connecting the expansion joint and the slab, and it is a part of expansion and contraction according to the temperature change generated by the expansion joint, drying shrinkage according to the age of concrete, Creep (CREEP), which is a phenomenon in which deformation of the material increases in accordance with this flow, absorbs the movement and rotation of the upper structure due to live load, and transmits it to the slab.

Future concrete, which plays an important role in bridges and the like, is directly exposed to the vehicle load and is in a state of being impacted by the oil of the expansion joint to accommodate the temperature behavior.

Futa concrete exposed to such a continuous impact load or a harmful environment has a fundamental problem in that the deterioration speed is inevitably accelerated and the damage also frequently occurs.

Accordingly, when the after-concrete of the expansion joint device such as a bridge is damaged, as shown in Table 1 below, the operator selects 5 ~ 10 cm larger than the portion where the breakage occurred, I am using the method.

Futa Concrete Breakage foreground  Futa Concrete Maintenance View

However, in the conventional after-concrete repair method, after repairing the concrete portion after the repair, breakage and breakage of the contact portion with the existing concrete portion frequently occur over time, and there is a widening due to the property difference in the after- There is a structural problem in that the penetration of rainwater or penetration of chloride may increase the spalling of the after-concrete part and the deterioration of the alternating concrete and the concrete apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of constructing a concrete structure for a bridge, It is possible to reduce the deterioration speed and to fundamentally prevent the damage caused by external impact by constructing the heating concrete surface layer polymer asphalt concrete after the grid installation so that the after concrete is not exposed to the outside, thereby ensuring the durability of the expansion joint device And it is an object of the present invention to provide a non-exposed concrete method for a stretch joint which can improve the flatness of an expansion joint.

In order to achieve the above object, according to the present invention, there is provided a method of manufacturing a concrete structure, comprising the steps of: removing a conventional expansion joint and breaking a concrete and an ascon pavement around a conventional expansion joint device so as to reveal a cast iron muscle of left and right top plate sleeves; And a pair of left and right top plate slabs are inserted and joined to each other so as to be able to expand and contract in the joint portion of the left and right top plate slabs. In order to increase the binding force by connecting the expansion joint device and left and right top plate slabs, A step of welding and fixing the main steel bars, the reinforcing bars and the sections arranged at regular intervals, welding and fixing them to the main steel bars of the left and right top plate slabs, Of the expansion and contraction device comprising the step of pouring in-place concrete In another concrete repair method,

Forming a front end fixing groove by cutting the rear concrete to a depth of 5 mm to 10 mm lower than the top height of the expansion joint device and cutting the front concrete after the last concrete curing to a depth of 5 mm to 10 mm;

A top surface space is formed by cutting the upper end portion of the ascon package in the direction of the left and right top plate slabs to a length of 5 mm to 10 mm and cutting to a length of 50 mm to 150 mm in the cross section of the asbestos packing line of the left and right top plate slabs facing the succeeding concrete, Forming a rear-end fastening groove by cutting the lower part to a depth of 5 mm to 10 mm; And

A heating type surface layer polymer asphalt concrete is poured through the surface layer space and the rear end fixing groove so that the upper end of the expansion joint device and the upper end of the ascon package are aligned with each other, And pouring and drying.

The present invention also provides a method of manufacturing a composite structure, comprising the steps of: removing a conventional expansion joint and breaking the concrete and the ascon package around the existing expansion joint device so that the cast iron rods of the left and right top plate sleeves are exposed; And the upper and lower slabs are connected and fixed to each other so as to increase the binding force of the upper and lower slabs, A step of welding and fixing the steel plate to weld the steel plate to the steel bars of the left and right slabs of the upper and left slabs, In a subsequent concrete repair method of a jointing device,

Forming a front end fixing groove by cutting the rear concrete to a depth of 5 mm to 10 mm lower than the upper end of the expansion joint device and cutting the front concrete after the after concrete curing to a depth of 5 mm to 10 mm;

The aspheric pavement of the left and right upper slabs facing the later concrete is cut in the direction of the left and right upper slabs in the direction of the left and right upper slabs to form a cushioning space and the upper ends of the ascon pavement are sliced from left and right slabs, Forming a surface layer space by cutting a length of 50 mm to 150 mm to a thickness of 5 mm to 10 mm in a slab direction and cutting a depth of 5 mm to 10 mm from the end of the surface layer space to form a rear end fixing groove;

Installing a drain pipe in the buffer space;

Placing a heated polymer asphalt concrete in the buffer space; And

The heating type polymer asphalt concrete is dried and then a heating type asphalt type sealing agent is poured into the front end fixing groove and the top face of the heated concrete type polymer asphalt concrete in the cushioning space and the front side space and the rear end fixing groove And placing the heating type surface layer polymer asphalt concrete so that the height of the upper surface of the asphalt pavement matches the height of the upper end of the expansion joint device.

Wherein the heating type surface layer polymer asphalt concrete is placed and dried in the step of placing the heating type surface layer polymer asphalt concrete before the heating type surface layer polymer asphalt concrete is laid, And a reinforcing grid seating step in which the grid-like reinforcing grid is placed on the upper surface of the concrete so as to have the same plane.

As described above, according to the present invention, since the upper concrete after the new bridge is stretched or the existing exposed upper concrete is cut, the heating type surface layer polymer asphalt concrete is installed after the reinforcement grid is installed to prevent the after- , The deterioration speed can be reduced, the damage caused by the external impact can be fundamentally prevented, the durability of the expansion joint can be ensured, and the flatness of the expansion joint can be improved.

In addition, since the heating type surface layer polymer asphalt concrete is laid over the packing part at a predetermined distance in a superimposed manner, the spattering of the after-concrete and the packing is prevented, It is possible to mitigate deterioration of the semiconductor device.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph showing a state in which a conventional expansion joint is removed from a concrete unexposed construction method of a stretch joint according to an embodiment of the present invention,
2 is a photograph showing a state in which a new expansion joint device is installed and welded in the after-concrete non-exposure method of the expansion joint device of the embodiment of the present invention,
FIG. 3 is a photograph showing a state in which the after concrete is laid in the after-concrete non-exposure method of the expansion joint device of the embodiment of the present invention,
FIG. 4 is a photograph showing a cushioning space, a surface space, and a rear end binding groove formed between the after-concrete and the existing Ascon package in the after-concrete non-exposure method of the expansion joint according to the embodiment of the present invention,
5 is a photograph showing a state where a drain pipe is installed in a cushioning space of the after-concrete non-exposure method of the expansion joint device of the embodiment of the present invention,
FIG. 6 is a photograph showing a state in which a heating type polymer asphalt concrete is laid in a cushioning space of a non-exposed concrete method of a stretch joint according to an embodiment of the present invention,
FIG. 7 is an enlarged side sectional view of a main portion showing a state in which a reinforcement grid is installed on a top end fixing groove, a rear end fixing groove, a heating type polymer asphalt concrete, and a top concrete of a subsequent concrete unexposed method of the expansion joint device of the embodiment of the present invention;
Fig. 8 is a photograph showing a state in which a heating type surface layer polymer asphalt concrete is laid on a front end binding groove, a rear binding groove, a surface space, and a top surface of a buffer space in a non-exposed concrete method of a stretch joint according to an embodiment of the present invention. ,
9 is a photograph showing the completion of the construction by the after-concrete non-exposure method of the expansion joint device of the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator, and the like.

Therefore, it goes without saying that the definition should be based on the contents throughout this specification.

In the after-concrete non-exposure method of the expansion joint device of the present invention,

First, as shown in FIG. 1, there is a step of removing the existing expansion joint device and breaking the concrete and the ascon package around the existing expansion joint device so that the cast iron rods of the left and right top plate sleeves 60 and 60a are exposed. If the existing expansion joint device can be used, it is also possible to dismantle the surrounding concrete and the asbestos pavement in a state in which the existing expansion joint device can be used.

The sound absorbing material 71 is inserted into the spacing portions of the left and right upper plate sleeves 60 and 60a and the elastic rubber 72 inserted in the inner side so as to be able to extend and retract in the joint portions of the left and right upper plate slabs 60 and 60a, 60a of the left and right upper slabs 60, 60a are fixed at predetermined intervals to increase the binding force by connecting and fixing the expansion joint 70 and the left and right upper slabs 60, 60a, And reinforcing steel bars and sections are welded and fixed, and welded and fixed to the left and right upper slabs 60 and 60a with the cast iron rods.

3, the concrete 50, which is a quick-speed concrete, is placed in an empty space between the cast steel reinforcing bars, the reinforcing bars, and the stretch joints 70, And after the curing of the concrete 50 is finished, the front end joint groove 51 is cut to a depth of 5 mm to 10 mm below the front end of the expansion joint device 70.

4, the ascon pavement 61 of the left and right top plate slabs 60, 60a facing the next concrete 50 is moved in the direction of the left and right top plate slabs 60, 60a from the next concrete 50 by 50 mm to 150 mm A buffer space 40 having a rectangular or inverted trapezoidal shape at the side end face is formed and the upper end portion of the ascon package 61 is formed at the front end face of the left and right upper plate slabs 60, The surface layer 41 is formed by cutting a length of 50 mm to 150 mm with a thickness of 5 mm to 10 mm in the direction of the left and right upper panel slabs 60 and 60a and cutting to a depth of 5 mm to 10 mm from the end of the surface layer space 41 And a step of forming the rear end binding groove 42 is performed. Needless to say, the buffer space 40 may be omitted if necessary.

As shown in FIG. 5, a drain pipe 30 is installed in the buffer space 40.

As shown in FIG. 6, the heating type polymer asphalt concrete 20 is poured into the buffer space 40. The heated polymer asphalt concrete 20 is a known modified asphalt (Guston DS30) having improved performance by incorporating a polymer material such as SMA, PMA (SBS), latex, CRM and the like.

7, a heating type asphalt type sealing agent 11 (GUSSBIT-JS555) is placed in the front end fixing groove 51 after drying the heating type polymer asphalt concrete 20, and the front end fitting groove 51 Reinforced grid 12 is placed on the upper surface of the after-concrete 50 and the upper surface of the heated polymer asphalt concrete 20 so as to extend from the upper part of the upper concrete to the upper part of the rear end binding groove 42, The grid is subjected to a seating step.

Thereafter, as shown in FIG. 8, the upper surface of the concrete 50, the upper surface of the heated polymer asphalt concrete 20 of the cushioning space 40, and the upper surface of the heated polymer asphalt concrete 20, Placing the heating type surface layer polymer asphalt concrete (10) on the upper surface including the reinforcing grid (12) so that the upper end of the expansion joint device (40) and the upper end of the ascon package (61) Thus, as shown in FIG. 9, the repair work of the present invention is completed. The heating type surface layer polymer asphalt concrete 10 is a known modified asphalt (Guscon DS10) having improved performance by mixing polymer materials such as SMA, PMA (SBS), latex, CRM and the like.

The present invention minimizes the level difference between the existing Ascon package and the expansion joint device, thereby reducing the noise of the vehicle and improving the running performance, and the heating type surface layer polymer asphalt concrete 10 and the heating type polymer asphalt concrete 20 Since they are located on the upper surface and the side surface of the after-concrete 50 while having elasticity and a supporting force by the reinforcement grid 12, the after-concrete 50 is protected to absorb the impact applied to the after-concrete 50, As a result, the expansion joint device 70 can also be protected.

In addition, it is possible to effectively drain the infiltration water by the drain pipe 30 in the buffering space 40, and in particular, it is possible to re-work the expansion joint device 70 more easily during repacking by cross-cutting, The fracture of the concrete 50 can be minimized in a fundamental way.

10: Heating type surface layer polymer asphalt concrete
11: Heating type polymer asphalt sealing 12: Reinforcement grid
20: Heating type polymer asphalt concrete
30: drain pipe
40: buffer space 41: surface space
42: rear end fixing groove
50: After-concrete 51:
60,60a: Left and right top plate sleeves 61: Ascon packaging
70: expansion joint 71: sound absorbing material
72: Extension rubber

Claims (3)

Removing the conventional expansion joint device and breaking the concrete and the ascon package around the existing expansion joint device so as to reveal a cast iron muscle of the left and right top plate sleeves 60 and 60a; The expansion joint device 70 having the elastic rubber 72 inserted in the inner side so as to be able to expand and contract in the joint of the slabs 60 and 60a is provided and the expansion joint device 70 and the left and right upper slabs 60, A reinforcing steel bar and a steel bar arranged at regular intervals are installed on the front ends of the left and right top plate slabs 60 and 60a to weld them to each other and welded to the left and right top plate slabs 60 and 60a, (70); and placing a concrete (50) having a quick-speed concrete in the space between the reinforcing steel bars, the reinforcing bars and the section, and the stretching joint In other concrete repair methods,
The after concrete 50 is poured 5 mm to 10 mm lower than the height of the upper end of the expansion joint 70 and the lower concrete 5 is installed at the tip of the expansion joint 70 after curing the concrete 50 with a depth of 5 mm to 10 mm To form a front end fixing groove (51);
The upper end portion of the ascon package 61 on the front surface of the ascon package 61 of the left and right upper panel slabs 60 and 60a facing the next concrete 50 is set to a thickness of 5 mm to 10 mm in the direction of the left and right upper panel slabs 60 and 60a Forming a surface-layered space 41 by cutting to a length of 50 mm to 150 mm and cutting the surface of the surface-layered space 41 to a depth of 5 mm to 10 mm below the rear surface of the surface-layered space 41 to form a rear- And
A heating type asphalt sealing agent 11 is placed in the front end fixing groove 51 and the upper end of the expansion joint device 40 and the top end of the asphalt pavement 40 are passed through the front surface space 41 and the rear end fixing groove 42, And placing the heating type surface layer polymer asphalt concrete (10) so that the height of the upper surface of the upper layer polymer asphalt concrete (10) coincides with the upper end of the upper concrete layer (61). Removing the conventional expansion joint device and breaking the concrete and the ascon package around the existing expansion joint device so as to reveal a cast iron muscle of the left and right top plate sleeves 60 and 60a; The expansion joint device 70 having the elastic rubber 72 inserted in the inner side so as to be able to expand and contract in the joint of the slabs 60 and 60a is provided and the expansion joint device 70 and the left and right upper slabs 60, A reinforcing steel bar and a steel bar arranged at regular intervals are installed on the front ends of the left and right top plate slabs 60 and 60a to weld them to each other and welded to the left and right top plate slabs 60 and 60a, (70); and placing a concrete (50) having a quick-speed concrete in the space between the reinforcing steel bars, the reinforcing bars and the section, and the stretching joint In other concrete repair methods,
The after concrete 50 is poured 5 mm to 10 mm lower than the height of the upper end of the expansion joint 70 and the lower concrete 5 is installed at the tip of the expansion joint 70 after curing the concrete 50 with a depth of 5 mm to 10 mm To form a front end fixing groove (51);
The asphalt pavement 61 of the left and right top plate slabs 60 and 60a facing the next concrete 50 is cut in the direction of the left and right top plate slabs 60 and 60a by 50 mm to 150 mm in the later concrete 50, A buffer space 40 having a rectangular or inverted trapezoidal inverted trapezoidal shape is formed and the upper end portion of the asphalt pavement 61 is sandwiched between the upper and lower slabs 60 and 60a on the left and right upper slabs 60 and 60a, , 60a in the thickness direction of 5 mm to 10 mm and cut to a length of 50 mm to 150 mm to form a surface layer space 41 and cut to a depth of 5 mm to 10 mm below the end of the surface layer space 41, );
Installing a drain pipe (30) in the buffer space (40);
Placing a heated polymer asphalt concrete (20) in the buffer space (40); And
After the heating type polymer asphalt concrete 20 is dried, a heating type asphalt type sealing agent 11 is placed in the front end fixing groove 51, and the upper surface of the after-concrete 50 and the cushioning space 40 are heated Type polymer asphalt concrete 20 and the upper end of the expansion joint device 40 and the upper end of the ascon package 61 through the surface layer space 41 and the rear end fixing groove 42 And a step of placing the surface layer polymer asphalt concrete (10) on the surface of the concrete. 3. The method of claim 2,
In the step of placing and drying the heating type surface layer polymer asphalt concrete 10, it is preferable that, before the heating type surface layer polymer asphalt concrete 10 is laid, the upper surface of the rear end fastening groove 42 Further comprising a reinforcing grid seating step in which the grid-like reinforcing grid (12) is placed on the upper surface of the after-concrete (50) and the upper surface of the heated polymer asphalt concrete (20) Futa concrete non - exposure method.

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