KR100439245B1 - Expansion joint for concrete construction - Google Patents

Abstract

The present invention is to improve the expansion joint device to be placed at a time regardless of the length of the construction of the structure by reducing the construction period by reducing the construction cost, as well as to solve the problems that can be caused by construction delay A stretch joint device for a concrete structure, wherein the concrete is damaged by cracking and rupture with respect to extension and contraction by interposing at a predetermined length (L) in a direction perpendicular to the longitudinal direction of the structure 30 constructed by placing concrete. In the expansion joint device 35 for preventing;

The expansion joint device 35 is a expansion joint material 40 for molding a mixture of cork or cork and asphalt or compression foam rubber to form a concrete 46 on the structure 30 of a long length at the same time It is further provided with a core material 41 having a rigid so as to cope with the pressure applied during the concrete pouring in the interior of the;

Both sides of the core member 41 is exposed to the outside of the expansion joint member 40 to be fixed so as not to move by the formwork 47 and the fixing means 50 when installing the formwork 47 for placing concrete 46 It is characterized by forming 45.

Description

Expansion joint for concrete construction

The present invention relates to an expansion joint device for concrete structures, and more particularly, to provide an expansion joint device improved to be able to pour concrete structures such as retaining walls or boxes at the same time regardless of the length.

It is applied to civil engineering structures such as boxes, bridges, tunnels, etc., which are installed to construct retaining walls or underground works, and to construct sewage pipelines for roads and bridges, or to prevent earth and sand from cutouts and slopes. The concrete will stretch and contract.

If the concrete structure does not respond to elongation and contraction when stretched due to temperature change, the concrete is cracked and ruptured, resulting in damage to the structure.

As described above, if the damage is severe due to the elongation and contraction of the concrete, the structure is destroyed. If the damage is not severe, the structure is collapsed at any moment due to the accumulation of fatigue. Will follow.

As described above, in order to cope with the elongation and contraction according to the temperature change of the concrete structure, a substantial length of the structure is legalized to be installed through expansion joints every fixed length.

That is, as shown in Figure 1 is constructed so as to correspond to the elongation and contraction through the expansion joint device 35 for each predetermined length (L) in a direction perpendicular to the longitudinal direction of the structure 30 is built by pouring concrete.

Conventionally, the expansion joint device 5 interposed in the structure 1 for the purpose as described above is shown in Figure 2, and look at this in the form of a cork material or a mixture of cork and asphalt or molded by compression foam rubber, etc. In use, it is used to cut the same shape as the cross section of the structure (1).

When placing concrete for constituting the structure through the expansion joint device, after placing the concrete as much as ① section having a length through which the expansion joint member is interposed, it is not possible to pour at once over the entire length. After the concrete is cured in the structure of section ①, move it to the following sections ②, ③, ④ ..

Another method is to be applied when there is a space or a long length for installing the structure, as shown in (B) of Figure 3, there is a two-step pouring method.

This is done by placing the space as much as the length of the expansion joint member in the middle in the first place, and then, when the first-placed concrete is cured, the second place in the empty space to complete the structure.

As described above, it is not possible to pour a long-length structure at the same time because the expansion joint is made of a material with no rigidity, and therefore cannot be held in place by the pressure of the concrete to be poured at the same time.

When constructing the structure by placing concrete sequentially as above, the beauty of the beauty is not good because the color of the concrete is different in each section, and the increase of construction cost, which is the biggest problem of the construction of the structure, is long because the construction period is long. Becomes

And, if the length is long, there is a problem that the shape of the completed structure does not match, there is an inconvenience that must be accompanied by ancillary work, such as renewing the survey or grounding each time the concrete is poured in order to solve this problem.

First of all, there are many problems such as the destruction of the trench, cutting and cutting work site for the construction of the structure due to the long time for construction, or the incidence of traffic accidents, noise, and dust pollution during driving. .

Therefore, the present invention is to solve the problems as described above to shorten the construction period by improving the expansion joint device that is interposed in the structure every length, so that the concrete can be placed at a time regardless of the length of the construction of the long length The purpose is to reduce the construction cost, as well as to solve a variety of problems that can be caused by construction delay.

1 is a view showing a concrete structure for explaining the expansion joint of the present invention, (A) a retaining wall structure (B) a simplified perspective view of the box structure.

Figure 2 is a perspective view showing a expansion joint device for a concrete structure to which the prior art is applied.

Figure 3 (A, B) is a view showing the construction relationship of a concrete structure using a stretch joint device for a concrete structure to which the prior art is applied.

Figure 4 is a partially omitted perspective view showing a expansion joint device for a concrete structure to which the technique of the present invention is applied.

5 (A), (B), (C) is a partially omitted perspective view of the core material of the expansion joint device for a concrete structure to which the technique of the present invention is applied.

6 is a cross-sectional view taken along line A-A of the expansion joint for a concrete structure applied to FIG.

Figure 7 is a perspective view showing the construction of the structure using the expansion joint device for concrete structures to which the technique of the present invention is applied.

8 is a cross-sectional view taken along the line B-B of the construction state of the structure applied to FIG.

Figure 9 is a plan sectional view of the completed state of construction with expansion joints for concrete structures to which the technique of the present invention is applied.

Figure 10 is a cross-sectional plan view of the completed construction in the expansion joint device for a structure applied another technology of the present invention.

* Description of the symbols used in the main parts of the drawings *

30; structure

35; Expansion joint

40; Expansion joint

41; Heartwood

42; Strength aid

45; projection part

50; Fixing means

Hereinafter, with reference to the accompanying drawings will be described the configuration, operation and effects of the present invention for achieving the above object.

Figure 4 is a perspective view of a partially omitted state showing the expansion joint device for a concrete structure applied technology of the present invention, Figure 5 (A), (B), (C) is a expansion joint device for a concrete structure applied technology of the present invention Partial omission state perspective view of the core material, Figure 6 is a cross-sectional view taken along the line A-A of the expansion joint device for a concrete structure applied to Figure 4, Figure 7 using the expansion joint device for a concrete structure applied technology of the present invention Figure 8 is a perspective view showing the construction of the structure, Figure 8 is a cross-sectional view taken along the line B-B of the construction state applied to Figure 7, Figure 9 is a state of completion of construction in the expansion joint device for concrete structures to which the technique of the present invention is applied FIG. 10 is a cross-sectional view illustrating the construction completed with the expansion joint device for a structure to which another technique of the present invention is applied.

The expansion joint device 35 is to prevent the concrete from being damaged by cracks and ruptures against elongation and contraction by interposing a predetermined length L in a direction perpendicular to the longitudinal direction of the structure 30 which is constructed by pouring concrete. .

In the present invention, by improving the expansion joint device 35 to be able to pour the structure 30 of the long length at the same time, it is characterized in that it can solve the additional problems such as shortening the air and construction costs, as well as safety problems. .

The expansion joint device 35 to which the technique of the present invention is applied is a pressure applied when concrete is poured into the expansion joint material 40 provided in the form of a plate by forming a cork material or a mixture of cork and asphalt or compressed foam rubber. It further comprises a core 41 which can cope with.

The core material 41 is a flat plate type core material 41 used when the size of the structure 30 is not large as shown in (A) of Figure 5, and the strength auxiliary means 42, such as (B) or (C) May be further formed.

In the case of (B), when the size of the structure 30 is about medium, the formation of grooves or protrusions and the fixing of plates and bars for strength reinforcement in the longitudinal or transverse direction of the surface of the core 41 by the strength supplementary means 42 are performed. Or when wrinkles are formed.

And, in the case of (C) is inserted into a plurality of steel wires 43 in the transverse direction of the core material 41 so as to maintain sufficient rigidity as the strength auxiliary means 42 used when the size of the structure 30 is large, Both ends of the steel wire 43 may be provided with a screw 44 for fixing.

Of course, the material of the core material 41 may vary freely depending on the type of the structure 30 or the cross-sectional area of the structure 30 such as a metal material or a high strength plastic having sufficient rigidity.

Both sides of the core member 41 forms a protrusion 45 to be exposed to the outside of the expansion joint member 40 to form the mold 47 and the fixing means 50 when installing the formwork 47 for placing concrete 46. Make sure that it is fixed so that it does not move.

The fixing means 50 forms a fixing groove 51 for accommodating the protrusion 45 of the core material 41 on the front side, and interposed between the form 47 and the pin 47 on the rear side. It is to have a yaw-shaped space (52) having a fixing hole to be fixed with.

In the drawings, reference numeral 100 denotes an index plate or an index system.

The present invention as described above,

When constructing a long structure 30, formwork 47 for the entire length of the structure 30 is installed, and the expansion and contraction device 35 is interposed in a predetermined length in the middle of the formwork 47. .

At this time, the expansion joint device 35 is installed in a direction perpendicular to the length of the formwork 47, is fixed in the middle of the expansion joint member 40 is connected to the formwork 47 the projections 45 exposed at both ends. Secured by means of means (50).

After the expansion joint 35 is fixed as described above, the concrete 46 may be poured simultaneously with respect to the entire length of the structure 30.

When placing the concrete 46 as described above, when the concrete 46 is placed in the intermediate position between the expansion joint 35 and expansion joint 35, the pressure applied to the expansion joint 35 direction Since the state becomes almost uniform, the concrete 46 can be poured more easily.

However, even if the concrete 46 is not necessarily placed in the intermediate position between the expansion joint 35 and the expansion joint 35, the expansion joint 35 is deformed or positioned by the pressure of the concrete 46 in which the expansion joint 35 is placed. There is no phenomenon that will deviate.

It incorporates a core material 41 having sufficient rigidity in the middle of the expansion joint material 40 constituting the expansion joint device 35, and the core material 41 is rigid with the formwork 47 by the fixing means 50. It becomes possible because it is fixed in state and does not move.

In particular, the core material 41 is further provided with strength auxiliary means 42 for forming grooves or protrusions to fix the strength in the longitudinal direction or the lateral direction, and for fixing or crimping the plate and rod to reinforce the strength. Will correspond to the pressure of the concrete 46 to be.

When the strength supplement means 42 provided in the core material 41 inserts the steel wire 43 into the core material 41, both ends of the steel wire 43 are moved out of the fixing means 50 which is fixed to the formwork 47. The screw 44 formed in the protrusion may be firmly tightened with a bolt, and thus the steel wire 43 may be pulled out to maintain a tensioned state to maintain the strength to withstand the pressure of the concrete 46 to be poured. .

After pouring the concrete 46 and curing the concrete 46 as described above, if the concrete 46 is completely hardened and then remove the formwork 47, the construction of the structure 30 is completed, after the construction of the structure 30 is completed Protruding portion 45 of the expansion and contraction joint 35 is exposed by finishing the caulking 60 so as not to harm the appearance.

As described above, the present invention improves the expansion joint so that concrete can be placed at one time regardless of the length of the structure, thereby shortening the construction period and reducing the construction cost, as well as solving the problems that may be caused by construction delay. Various effects can be obtained.

Claims (3)

In the expansion joint device (35) for preventing the concrete from being damaged by cracks and ruptures for elongation and contraction by interposing at a predetermined length (L) in the direction perpendicular to the longitudinal direction of the structure (30) constructed by pouring concrete ; The expansion joint device 35 is formed by mixing the cork or the cork and asphalt or the expansion foam rubber to form the concrete 46 on the structure 30 of the long length at the same time, the expansion joint material 40 It is further provided with a core material 41 having a rigid so as to cope with the pressure applied during the concrete pouring in the interior of the; Both sides of the core member 41 is exposed to the outside of the expansion joint member 40 to be fixed so as not to move by the formwork 47 and the fixing means 50 when installing the formwork 47 for placing concrete 46 To form 45; The core member 41, the expansion joint device for a concrete structure, characterized in that it further comprises a strength auxiliary means (42) that can correspond to the pressure generated when the concrete 46 is poured. The method of claim 1; The strength assistance means 42 is a expansion joint device for a concrete structure, characterized in that the surface of the core member 41 is composed of grooves or protrusions formed in the longitudinal or transverse direction. The method of claim 1; The strength assisting means 42 is a expansion joint device for a concrete structure, characterized in that by inserting the steel wire (43) formed with screws 44 at both ends into the core material (41).