KR101752396B1 - Water leakage induction method of construction for expansion joint and crack of Concrete structure - Google Patents

Abstract

(EN) The present invention relates to a method for inducing leakage of a concrete structure and a leakage joint of a cracked part, and more particularly, to a leakage flow through a movable joint or a crack joint occurring in the construction of a concrete structure such as a general building or a tunnel, And at the same time to reduce the congestion of the water through the multi-stage induction drainage and to promptly induce and drain large amounts of water.
In the method of the present invention, the expansion joint portion and the crack portion of the concrete structure are formed by cutting the target surface such as the expansion joint portion or the crack portion of the concrete structure to form the induction drainage repair groove (3) A first step of removing the protruding surface protruding from the groove surface and polishing the foreign object attached to the surface while polishing; A second step of applying a waterproofing material of a liquid alkali active material to the surface of the smoothly trimmed induction drainage repair groove through the first step to construct the primary waterproofing layer 10; A third step of applying urethane sealant to the first waterproof layer constructed through the second step to construct the second waterproof layer 20; A fourth step of providing a drain belt (30) having a plurality of drain holes over one surface as a flat plate material after the third step, wherein at least one side of the drain belt in the longitudinal direction is connected to the drainage part; A fifth step of installing a net hose (40) in the space of the induction drainage maintenance groove after the fourth step; A sixth step of installing an induction drain pipe (50) having a semi-circular cross section to surround the net hose installed in the fifth step; A seventh step of filling the filling material outside the induction drain pipe by the sixth step to construct the filling part 60; And an eighth step of applying a urethane sealant to the surface of the filling part to construct a stretch and waterproof finish layer (70)

Description

Technical Field [0001] The present invention relates to a water leakage induction method for a concrete structure,

[0001] The present invention relates to a method of inducing leakage of a concrete structure and a crack of a concrete structure, and more particularly, to a method of manufacturing a concrete structure, such as a joint structure or a tunnel, The present invention relates to a method for repairing cracks and expansion joints of a concrete structure that can prevent leakage of water through a multi-stage induction drainage and reduce the congestion of water through a large amount of water.

In general, concrete structures (civil engineering, construction) are continuously repeated shrinkage and expansion depending on other environments such as curing, temperature, vibration, and ground movement. Since the shrinkage and expansion affect the whole structure, it has MOVEMENT JOINT or EXPANSION JOINT to buffer it. This alleviates the destructive effects of the structure, but leakage through the joint is inevitable. In case of heavy leaks, aging and deterioration of the structure may be promoted and even breakage and collapse may be caused. In particular, in a water tank such as a reservoir, leakage of purified drinking water causes a huge loss of treasury.

In order to solve the above problems, a method of injecting a curable epoxy resin into a flexible joint or filling a foamed resin has been proposed. However, this method is also not effective. Recently, a repair method using a packing material having excellent stretchability has been proposed .

In the repair method using a conventional packing material, for example, a crack is formed by dugging an inner wall crack portion or a stretch joint portion of a tunnel to a predetermined depth, a packing material having excellent stretchability is installed in the groove, Maintenance is done by closing process.

However, the conventional repair method has the effect of preventing leakage in the short term, but it does not prevent leakage in the long term and there is a problem that existing cracks are further enlarged or new cracks are generated around the cracks. That is, when the packing material is normal or the inner wall of the tunnel is contracted, the inside of the groove is completely brought into close contact with the crack,

However, when the inner wall of the tunnel is elongated due to the change in temperature, a gap is formed between the wall surface of the groove and the packing material. Water flowing through the cracks flows through the gap, And cracks are promoted and concrete is dropped. In addition, there is no means for discharging the water flowing to the cracked portion when the inner wall of the tunnel is shrunk normally or during the normal time. As time passes, the back pressure increases on the inner wall. As a result, the leakage is weakened or the concrete is flooded, And there is a safety problem.

A patent document (Korean Patent Registration No. 10-0714437) for solving the above problems was invented and patented by the present inventor, and the surface to be applied such as a concrete elongation flow joint portion or a crack portion was cut to form a groove, The protruding surface protruding from the cut groove surface is removed and the foreign matter adhered to the surface is chipped. Then, the induction pipe is installed so as to cover the elongated flow joint portion or the cracked portion inside the groove smoothly cut through chipping, The present invention relates to a water leakage induction method in which a high-strength mortar is filled in a cutting groove provided with a drain pipe to recover an induction drainage repair groove, wherein a waterproofing material of a liquid alkali active material is applied to the surface of the smoothly- A waterproof layer of a urethane sealant is secondarily formed on the surface of the mortar of the recovered induction drainage repair groove, A step of covering the waterproof sheet on the surface of the waterproof sheet and a step of applying an adhesive in two stages to both edges of the waterproof sheet to adhere the waterproof sheet to the waterproof sheet. It is possible to effectively cope with cracks and whitening of the inner wall of the tunnel. In addition, there is an effect of preventing the periphery of the cracked portion from being flooded and generating new cracks or whitish phenomenon, but the drainage by the induction pipe is not smooth Structurally, there is a problem that the concrete structure is damaged by the water of the induction pipe because it is the water which is already collected in the induction pipe in the expansion joint.

Korean Patent No. 10-0714437

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to effectively prevent leaking through a movable joint or expansion joint of a concrete structure and a crack, Concrete structure It is possible to prevent the corrosion and cracks and thus the durability of the entire structure from deteriorating, reduce the congestion of water through multi-stage induction drainage, The purpose of the induction method is to provide.

In the method of the present invention, the expansion joint portion and the cracked portion leakage inducing method of a concrete structure are formed by cutting an object to be applied to a stretch joint portion or a crack portion of a concrete structure to form an induction drainage repair groove, A first step of removing the protruding surface and chipping the foreign substance attached to the surface while polishing the surface; A second step of applying a waterproofing material of a liquid alkaline active material to the surface of the smoothly trimmed inferior drainage repair groove through the first step to construct a primary waterproofing layer; A third step of applying a urethane sealant to the first waterproof layer constructed through the second step to construct a second waterproof layer; A fourth step of providing a drain belt having a plurality of drain holes on one surface thereof after the third step, wherein at least one of both sides of the drain belt in the longitudinal direction is installed in connection with the drainage part; A fifth step of installing a net hose in the space of the induction drainage maintenance groove after the fourth step; A sixth step of installing an induction drain pipe having a semi-circular cross section to surround the net hose installed in the fifth step; A seventh step of filling a filling material outside the induction drain pipe by the sixth step to construct a filling part; And an eighth step of applying a urethane sealant to the surface of the filling part to construct a stretch and waterproof finish layer.

According to the repairing method of the expansion joint part and the crack part of the concrete structure according to the present invention, the water which is the cause of the defect of the concrete structure (tunnel, box structure, etc.) The water is drained first by the induction drainage-induction drain pipe and the net hose second drainage), drainage belt discharges the water from the surface first, thereby relieving the burden of the induction drain pipe and the net hose, As a result, it is possible to prevent cracks and whitish phenomenon caused by water from progressing, as well as to prevent new cracks and whitish phenomenon from occurring due to submergence of the periphery of the cracked portion, effectively coping with the expansion and contraction of the inner wall of the concrete structure, There is an effect of improving.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a process of repairing an expansion joint portion and a crack portion of a concrete structure according to the present invention; FIG.
2 is a view of a tunnel showing a maintenance part constructed by the expansion joint part of the concrete structure according to the present invention and the leakage inducing method of the crack part.
3 is a view showing another application example of a concrete structure according to the present invention by an expansion joint portion and a leakage portion of a crack portion.
FIGS. 4 and 5 are views showing examples of adding a collecting box to the expansion / contraction portion of the concrete structure and the leakage inducing method of the cracked portion according to the present invention, respectively.
6 is a view showing another example of a drainage belt and a net hose applied to the expansion joint part of a concrete structure and the leakage induction method of a crack part according to the present invention.

In the following description of the present invention, 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. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

As shown in FIG. 1, the method of inducing water leakage in the expansion joint portion and the crack portion of the concrete structure according to the present invention is as follows.

1. Formation of induction drainage repair grooves.

The surface to be applied such as the expansion joint portion or the cracked portion of the concrete structures 1 and 2 is cut to form the induction drainage repair groove 3 and the projecting surface protruding from the surface of the induction drainage repair groove 3 is removed Polished and chipped off the foreign substances on the surface.

2. Construction of first waterproof layer.

The first waterproof layer 10 is formed by applying a waterproofing material to the surface of the induction drainage repair groove 3 whose surface is trimmed and cleaned through the chipping process. The waterproofing material forming the primary waterproof layer 10 is preferably an alkali active material having excellent reactivity with concrete.

3. Construction of second waterproof layer.

Thereafter, a urethane sealant is applied to the primary waterproof layer 10 to form the secondary waterproof layer 20.

The secondary waterproofing layer 20 prevents water from penetrating through the primary waterproofing layer 10 when leakage occurs due to cracks or the like of the primary waterproofing layer 10.

The primary waterproof layer 10 and the secondary waterproof layer 20 are formed on all surfaces of the induction drainage repair groove 3, that is, on three surfaces except the openings.

Since the thicknesses of the first waterproof layer 10 and the second waterproof layer 20 vary depending on the size of the concrete structure and the like, the thicknesses of the first waterproof layer 10 and the second waterproof layer 20 may be 1 mm to 10 mm.

4. Install the drain belt.

The drain belt 30 is provided with a plurality of drain holes 31 on one surface (the surface facing the secondary waterproofing layer 20) as a plate member. The drain holes 31 are spaced apart from each other by a predetermined distance, And the direction toward the secondary waterproof layer 20 is opened to induce and drain the water penetrating the secondary waterproof layer 20. [

As shown in FIG. 6, the drain belt 30 may have a plurality of drain holes 32 on the opposite side. The drain hole 32 at the lower side of the drawing reference induces and drains the water under the drain belt 30. One or more assembling protrusions 41 are formed in the net hose 40 so that the assembling protrusions 41 can be connected to the drain holes 32. [ And the net hose 40 and the drain belt 30 are assembled to each other.

One or more of the assembling projections 41 may be applied to the net hose 40 and may be formed entirely along the longitudinal direction of the net hose 40, As shown in FIG.

The assembly protrusions 41 may be formed in various shapes such as a band shape that is inserted into the drain hole 32 while surrounding the net hose 40.

The drain belt 30 is made of, for example, a water-impermeable material (PVC or PVA) and drains water using the drain hole 31, Water).

In this step, the drain belt (30) is installed so that the drain hole (31) of the drain belt (30) faces the secondary waterproof layer (20).

In this process, at least one side (preferably both sides) of both sides of the drain belt 30 in the longitudinal direction of the drainage belt 30 is discharged to the outside of the concrete structure, along the drainage hole 31 of the drainage belt 30, . The drainage section is a catchment box 80 and a drainage passage 4 described below.

Although the drain belt 30 is shown as being installed only on the ceiling portion which is one surface in the drawing, it can be installed on all three surfaces. The method of installing the drain belt 30 on the three sides includes a method in which one drain belt 30 is folded right and left in the form of the induction drainage repair grooves 3 and a method in which three drain belts 30 are provided on each surface There is a way to install.

5. Install the network hose.

The net hose 40 is an induction drainage hose having the same function as that of the oil pipe, and is an off-the-shelf product and is installed below the drain belt 30.

The installation of the net hose 40 can be performed using an adhesive, a fixing band, a drain hole of the drain belt 30, or the like.

The adhesive type installation is such that the adhesive is applied to the periphery of the net hose 40 and adhered to the surface of the drain belt 30. The fixed band type attachment is fixed in the form of oil U along the longitudinal direction of the net hose 40 (See FIG. 6) is formed at the periphery of the net hose 40 so that the assembly (not shown) of the drain hose 40 is formed And the projections 41 are fitted in the drain holes 32 of the drain belt 30. The assembly projections 41 are preferably hook-shaped. The assembly projections 41 are fitted into the drain holes 32 by various methods such as a fitting type and a sliding type.

The net hose 40 is connected to the drainage passage 4 or the collecting box 80 on both sides in the longitudinal direction to induce water to be discharged to the drainage passage 4 or the collecting box 80.

6. Installation of induction drain pipe.

Install the induction drain pipe (50) so as to cover the net hose (40) and the extensible flow joint or the cracked part. At this time, in the case of a tunnel or a column, one end of the induction pipe 50 is connected to the drainage passage 4 (or the collecting box 80) installed along the tunnel edge so that the water leaking through the induction drainage pipe 50 .

As the induction drain pipe 50, a semi-cylindrical semi-circular pipe which is an impermeable material is used. This is because the width of the induction pipe can be easily varied according to the expansion / contraction of the concrete joint portion due to the change in temperature, thereby effectively preventing leakage from occurring through the gap between the induction pipe 50 and the groove .

The induction drain pipe 50 can be assembled by using the drain hole 32 of the drain belt 30 like the net hose 40. The induction drain pipe 50 can be assembled to both the left and right ends of the induction drain pipe 50, And the induction drainage pipe 50 is provided by fitting the assembly projections into the drain holes 32 (or fitting and adhering the adhesive), so that the installation work is very easy.

It is also possible for the drain belt 30 to have a separate mounting groove for assembling the net hose 40 and the induction drain pipe 50.

The advantages of installing both the drain belt 30, the net hose 40 and the induction drain pipe 50 through a single operation by assembling the drain belt 30, the net hose 40 and the induction drain pipe 50 integrally .

7. Form filling.

Subsequently, when the installation of the induction pipe 50 is completed, the filling part (mortar, liquid rubber, etc.) is filled in the induction drainage repair groove 3 provided with the induction pipe 50 to form the filling part 60. The filling part 60 also functions as a waterproofing and is laid on the same line as the surface of the concrete structures 1 and 2 or is paved with an interval equal to the thickness of the stretch and waterproof finish layer.

8. Formation of new waterproof finish layer.

After the curing of the filling part 60, a urethane sealant is applied to the surface of the filling part 60 to form a stretch and waterproof finishing layer 70. Urethane sealant is easy to construct, can be completely waterproofed, can form continuous waterproof layer without joint part, and light weight makes it less burden of building load. The stretch and waterproof finishing layer 70 is formed to cover the induction drainage repair grooves 3 and the surroundings (formed so as to cover the construction site), thereby watering the water that can flow along the surfaces of the induction drainage repair grooves 3.

The high elasticity waterproof sheet is further adhered to the surface of the stretch and waterproof finish layer 70 to cover the construction site and finally the adhesive is applied again along the edges of the waterproof sheet bonded to the construction site to prevent the waterproof sheet from falling A finishing process may be included. Here, as the adhesive, an epoxy resin having excellent adhesiveness can be used.

2 and 3 are views showing an example of construction using the method according to the present invention, FIG. 2 is an example of construction for an arched tunnel, and FIG. 3 is an example of construction for a bottom of a box structure.

According to the water leakage induction structure of the concrete joint constructed by the present invention, when the groundwater leaks through the concrete structure joint or the crack due to the crack, the water penetrates through the first waterproof layer 10 and the second waterproof layer 20 Lt; / RTI > The water flows into the drain holes 31 of the drain belt 30 through the first and second waterproof layers 10 and 20 when cracks or the like occur in the first and second waterproof layers 10 and 20, do. The primary and secondary waterproofing layers 10 and 20 block the penetration of water and can not induce and drain water, but the drain belt 30 induces water to be drained through the drain hole 31 to the drainage section.

Therefore, water is drained without being accumulated above the drain belt 30, thereby preventing water spoilage and further cracking.

The water that has passed through the drain belt 30 due to breakage of the drain belt 30 is collected in the induction drain pipe 50 and the collected water is guided to the drain portion through the induction drain pipe 50 and the net hose 40, .

Since the drain belt 30, the induction drain pipe 50 and the stretch and waterproof finishing layer 70 have an elastic force during the expansion and contraction behavior of the concrete structures 1 and 2, It is not shrunk and broken.

Hereinafter, the drainage portion of the drain belt 30 will be described.

As shown in FIG. 4, a collecting box 80 is installed on the bottom of the tunnel-type concrete structures 1 and 2. The collecting box 80 can be installed to be embedded or withdrawable at the bottom of the concrete structures 1, 2.

In the latter case, the box receiving grooves are formed at the bottom of the concrete structures 1 and 2, and the collecting box 80 is inserted into the box receiving grooves with the upper opening type. At this time, The end portion of the drain belt 30 is disposed. Also, the end portions of the net hose 50 and the induction drain pipe 50 are disposed together.

At this time, the water collecting box 80 is installed on the upper side or the side of the water drainage passage 4, and the water collecting box 80 and the water drainage passage 4 are connected by a connecting pipe, ). ≪ / RTI >

Alternatively, as shown in Fig. 5, the drain belt 30 (the net hose 40 and the induction drain pipe 50 are also available) can be extended to the drainage channel 4 to direct water to the drainage channel 4 have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1,2: Concrete structure, 3: Induction drainage repair groove
4: drainage,
10: primary waterproof layer, 20: secondary waterproof layer
30: drain belt, 40: net hose
50: induction pipe, 60: filling part
70: New waterproof finish layer, 80: Collecting box

Claims (4)

(3) is formed by cutting the surface to be applied of the expansion joint portion or the cracked portion of the concrete structure to remove the protruding surface protruding from the surface of the guiding drainage repair groove and to chop the foreign substance adhering to the surface A first step;
A second step of applying a waterproofing material of a liquid alkali active material to the surface of the smoothly trimmed induction drainage repair groove through the first step to construct the primary waterproofing layer 10;
A third step of applying urethane sealant to the first waterproof layer constructed through the second step to construct the second waterproof layer 20;
A fourth step of providing a drain belt (30) having a plurality of drain holes over one surface as a flat plate material after the third step, wherein at least one side of the drain belt in the longitudinal direction is connected to the drainage part;
A fifth step of installing a net hose (40) in the space of the induction drainage maintenance groove after the fourth step;
A sixth step of installing an induction drain pipe (50) having a semi-circular cross section to surround the net hose installed in the fifth step;
A seventh step of filling the filling material outside the induction drain pipe by the sixth step to construct the filling part 60;
And an eighth step of applying a urethane sealant having elasticity to the surface of the filling part to construct a stretch and waterproof finish layer (70)
Wherein at least one assembly protrusion is formed on the net hose and the assembly protrusion is assembled with the drain belt by fitting the assembly protrusion into a drain hole formed in the drain belt. Partial leakage induction method. [3] The method of claim 1, wherein the third step comprises: arranging a collecting box in a bottom portion of the concrete structure and inserting an end of the drain belt into the collecting box to collect water inductively drained along the drain belt And the leakage of water from the cracked portion of the concrete structure. [3] The method as claimed in claim 2, wherein the third step comprises connecting the water collecting box and the concrete structure to a drainage channel through a channel, and guiding the water collected in the water collecting box to the drainage passage. Leakage induction method of cracked part. delete

Images