KR19990039424A - Expansion joints for concrete slab - Google Patents

Abstract

The present invention guides the water flowing out of the ground in the longitudinal direction and the first blocking portion for supporting the body, and the second body connected between the first body and the second body to block the water flowing along the side wall of the first body Water blocking the water discharged from the waterproof layer such as the inner wall, retaining wall, floor, etc. by forming a blocking portion, and a third blocking portion which is selectively installed at the tip of the second body to block the water flowing out of the blocking region of the second blocking portion. To prevent the ground subsidence and the concrete layer from weakening due to the outflow of water, and the surrounding environment is contaminated, and the contaminated water is introduced into the ground to prevent the groundwater from being contaminated. It is related with the expansion joint for the concrete slab which can be made.

Description

Expansion joints for concrete slab

The present invention relates to expansion joints for concrete slabs used to reduce the construction area of concrete by arranging a large concrete construction surface into several small areas.

In general, when concrete is installed where there is a lot of water inflow from the outside such as underground roads, tunnels, underground garages, underground water tanks, culverts, and retaining walls, concrete mixed with cement, sand, gravel, and water During the curing process, as the moisture in the concrete evaporates, a gap is generated in the micro space occupied by the water, and the cracked concrete is cracked from the gap as the contraction and expansion by the heat of the atmosphere are repeated.

If cracks occur in the concrete as described above, water is introduced into the cracks that cause various adverse effects on the building. Therefore, in consideration of the occurrence of cracks in proportion to the construction area of concrete, a method of reducing the construction area of concrete has been devised.

In order to reduce the construction area of the concrete, the large construction surface is divided into several small areas using long timbers such as stools to reduce the construction area of concrete. Only very small cracks were generated that would not affect the building, and the intended purpose was achieved.

However, the expansion joints used to reduce and partition the large concrete construction area as described above can only be manufactured with the same thickness and height, so the concrete was only constructed in a horizontal state.

In this way, when the upper slab layer is constructed, not only rainwater or groundwater flows down but also a problem of slumping, and the concrete injected surface is attached to the space of expansion joints spaced apart by the concrete injected into the small space partitioned by the inclined angle. When the whole is in a connected state, a problem occurs that the crack easily occurs in the slab layer.

Therefore, the conventional expansion joints as described above are formed at the same height, so when the slab layer is inclined, the lower sides of the inclined expansion joints are joined to the concrete of the adjacent section and cracks are generated in the slab. In addition, in the case of the conventional expansion joints, when the concrete slab in the partitioned space is contracted while the leading end of the expansion joints and the end of the slab layer are located on the same line, the concrete slab parts that are in contact with the expansion joints are spaced apart from each other. Rainwater seeps into the gaps in the broken areas. The soaked rainwater is accumulated on the lower side of the expansion joint, and when it is winter, it freezes and becomes bulky, causing cracks in the concrete slab.

In order to solve this problem, the expansion joint for the concrete slab for preventing the crack of the concrete slab by dividing the concrete slab of a large area into several small space has been proposed and used.

However, the expansion joints as described above has the advantage that the slab can be installed horizontally or inclined by forming the cutout to allow horizontal installation and inclined installation of the expansion joints, but the sealing member coked to prevent moisture from penetrating into the expansion joints is The hardening phenomenon occurred due to the atmospheric temperature in winter, so the waterproof effect could not be expected.When the concrete plate expands in summer, the supports of the expansion joints do not suppress the expansion force of the concrete plates, causing cracks and installing the expansion joints. And it is not easy to join and detach with the fixing mortar when removing, there was a problem that can not arbitrarily select the height of the expansion joint according to the thickness of the concrete.

In order to solve this problem, the applicant of the present invention has applied for a stretch joint for the concrete slab as shown in Figure 1 (1996 Utility Model Registration Application No. 38642).

The slab expansion joint is provided with a cutting portion 111 of the ordinary light lower strait, is provided with a support 112 that vertically connected the lower portion of the cutting portion 111, the cutting portion 111 and the support 112 of the The cap 11 is formed with a cutting groove 113 formed from the inner side to the outer side at the center of the boundary line and the upper portion, and the insertion groove 121 is provided at positions spaced apart at regular intervals on both sides, and guided inwardly in the lower center. The first body 10 having the groove 122 and integrally integrated the partition wall 12 having the cutting grooves 123 and 123 'recessed inward in the center of the upper and lower partitions integrally with the lower portion of the cap 11 is provided. .

In addition, the upper center of the partition 21 constitutes a rail 211 slidably inserted into the guide groove 122 of the first body 10, the lower center of the partition 21 guided inwardly The second body 20 constituting the groove 212 and the cutting grooves 213 and 213 'recessed inward in the center of the upper and lower partitions of the partition 21 are configured.

In addition, a rail 311 is slidably inserted into the guide groove 212 of the second body 20 at the upper center of the partition 31, and the upper and lower partitions of the partition 31 are recessed inwardly. The third body 30 constituting the cutting groove 312 is configured.

By the way, when the expansion joint as described above is installed in the concrete, which is placed on the surface of the retaining wall (A), for example, as shown in Figure 1 the water generated in the waterproof layer (B) of the retaining wall (A) body (10) ( 20) (30) flows into the gap between the sidewalls of the concrete (C) and flows to the outside, thereby weakening the slab layer and contaminating the surrounding environment, and contaminated water enters the ground and contaminates the groundwater. .

The present invention has been made in view of the above-mentioned conventional defects, and an object thereof is a stretch joint for a concrete slab that can block water from leaking out from the outside along the side wall of the body in a waterproof layer such as an inner wall, a retaining wall, or a basement. In providing ash.

The present invention for achieving this object includes a first blocking portion for guiding the water flowing out of the ground in the longitudinal direction and supporting the body; A second cut-off portion connected between the first body and the second body to block water flowing out along the sidewall of the first body; It is characterized in that it comprises a cap and the optional at the front end of the second body to constitute a third blocking portion for blocking the water flowing along the side wall of the second body.

1 is a cross-sectional view showing a construction state of a conventional joint material

Figure 2 is a perspective view showing a state of coupling of the present invention expansion joint

Figure 3 is a cross-sectional view showing a bonding state of the present invention expansion joints

Figure 4 is a cross-sectional view showing a coupling state of the second blocking portion of the present invention

Figure 5 is a cross-sectional view showing a state in which the upper support member of the second cut-off portion of the present invention

6 is an operational state diagram of the sealing member of the present invention,

(A) is an operating state diagram of the second blocking portion when the concrete is expanded,

(B) is an operating state diagram of the second cut-off part when the concrete shrinks.

7 is a perspective view of the third blocking portion of the present invention

8 is a cross-sectional view showing a state in which the third blocking portion of the present invention is coupled;

<Explanation of symbols for main parts of the drawings>

1: first body 2: second body

3: cap 40: first blocking portion

41: guide groove 50: the second blocking portion

51: body 52: upper mounting groove

53: lower mounting groove 54: lower support member

55: spring 56: upper support member

57: sealing member 60: third blocking portion

Hereinafter, the configuration of an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Figure 2 is a perspective view showing a coupling state of the present invention expansion joint, Figure 3 is a cross-sectional view showing a bonding state of the present invention expansion joint.

The elastic joint member to which the present invention is applied comprises a first blocking portion 40 which guides the water flowing out of the ground in the longitudinal direction and supports the first body 1, and the first body 1 and the second body. The second blocking portion 50 is connected between the body 2 to block the water flowing along the side wall of the first body 1, the cap 3 and the end of the second body (2) Selectively installed to constitute a third blocking portion 60 to block the water flowing out of the blocking region of the second blocking portion, which will be described in more detail as follows.

The first blocking portion 40 is provided with a guide groove 41 formed in the longitudinal direction by being recessed in a semi-circular shape on the rear surface, and is provided up and down, and is fixed to be inserted into the lower end of the first body 1 at the center of the front surface. 42 is provided, and a pair of supports 43 are provided on both sides spaced apart at intervals to accommodate the bottom thickness of the first body 1.

The second blocking portion 50 is spaced at predetermined intervals at both centers of both sides of the body 51 having the same thickness and length as the first and second bodies 1 and 2, and is opened to the upper side and both sides of the inner wall of both sides. An upper installation groove 52 having an upper protrusion 521 having an upper surface inclined downward inward is provided at an upper portion thereof, and a lower installation groove 53 having lower protrusions 531 formed at a central position of both inner walls. do.

In addition, it is inserted into the lower installation groove 53 is composed of a rectangular plate body 541 of the same length as the body 51 so that the upper surface of both sides to the bottom surface of the lower projection 531 in a suitable position spaced apart at regular intervals of the upper surface A lower support member 54 having a support boss 542 installed therein comprises a spring 55 on the support boss 542 of the lower support member 54, and an upper installation groove on the upper portion of the spring 55. Inserted by sliding from one side of the opening 52 and rotated 90 degrees is provided with an upper support member 56 that is caught by the upper projection 531 to support the spring 55 does not flow. The upper support member 56 is formed by compression molding of starch, which is dissolved when water penetrates. The spring 55 and the upper support member 56 are provided in the same number as the support boss 542 protruding from the lower support member 54 so as to be respectively seated on top of the support boss 542.

The sealing member 57 in which the bentonite-based rubber index material having excellent shrinkage expansion force due to moisture is equal to the width and length of the upper installation groove 52 and at least two times higher than the depth of the upper installation groove 52. Is provided is forcibly inserted into the upper installation groove 52 to be molded.

As shown in FIGS. 7 and 8, the third blocking unit 60 slides the stainless steel sheet in a triangle to bend the lower ends of both inclined sides inward to slide on the rail formed at the tip of the second body 2. It is configured to be formed in a manner, and through the inlet hole 61 in a predetermined spaced apart position of the inclined both sides. The third blocking portion 60 is installed as a substitute for the cap (3) when constructing a concrete layer in a place where the leakage is severely concerned.

Next, the process of blocking the water flowing out of the ground by the present invention configured as described above will be described in detail with reference to FIG.

First, the water flowing out of the waterproof layer (B) of the retaining wall (A) is guided in the longitudinal direction by the guide groove (41) of the first blocking portion 40 in close contact with the waterproof layer (B) is a drainage path (not shown) or the sump Is discharged.

The water flowing out along the side wall of the first body 1 through the first blocking part 40 is leaked to the second body 2 side by the sealing member 57 of the second blocking part 50. Is blocked. At this time, the moisture is introduced along the inner wall of the upper installation groove 52 into which the sealing member 57 is inserted, and the introduced moisture penetrates into the upper support member 56 which supports the upper portion of the spring 55, thereby providing a predetermined time. After passing, starch is dissolved. When the upper support member 56 made of starch is dissolved through this process, as shown in FIG. 5, the dissolved liquid of the upper support member 56 flows to the periphery, and at the same time, the spring 55 is removed. It is tensioned and directly adhered to the lower portion of the sealing member 57, thereby supporting the sealing member 57 elastically.

In this case, when the upper support member 56 is removed and the sealing member 57 is under the elasticity of the spring 55 in the summer, when the concrete C is expanded due to the surrounding temperature rise, as shown in FIG. 6A. The sealing member 57 is forcibly contracted while compressing the spring 55 by the concrete C that is expanded. On the other hand, in winter, when the concrete C shrinks due to a decrease in the surrounding temperature, the sealing member 57 is expanded by the tension force of the spring 55 as shown in FIG. 6B.

As such, when the concrete C contracts and expands in accordance with the change of the ambient temperature, the sealing member 57 expands and contracts due to the elastic force of the spring 55, thereby causing the gap between the concrete C and the sealing member 57 to increase. Avoid gaps in the

In addition, the water flowing out from the side wall of the second body 2 and the periphery of the concrete layer without being blocked by the second blocking part 50 as described above is provided through the inclined both side walls of the third blocking part 60. After flowing through the inlet hole 61 is guided in the longitudinal direction is discharged to the drainage part and the sump.

As described above, the present invention guides the water flowing out of the ground in the longitudinal direction, and is connected between the first body and the first body and the first body and the second body, and the water discharged along the side wall of the first body. Waterproofing layer such as an inner wall, retaining wall, or bottom of the basement by forming a second blocking portion for blocking and a third blocking portion for selecting the cap and at the front end of the second body to block moisture flowing out of the blocking region of the second blocking portion. By blocking the water flowing out from the inside to the outside in order to prevent the concrete layer from weakening due to the leakage of water, the surrounding environment is contaminated, and the contaminated water flows into the underground to prevent the groundwater from being contaminated. It is to have the advantage.

Claims (4)

In order to prevent the concrete slab from cracking by dividing a large area of concrete slab into several small spaces, a plurality of bodies (1) and (2) are connected in a straight line and a cap (3) is connected to the expansion joint for the concrete slab. In A first blocking portion 40 configured to support the rear end of the first body 1 and the rear surface is in close contact with the ground to guide moisture in the longitudinal direction; A second blocking portion 50 connected between the first body 1 and the second body 2 and configured to block water flowing out along the sidewall of the first body 1; It is installed in place of the cap (3) at the tip of the second body (2) is characterized in that it comprises a third blocking portion (60) for blocking the water flowing out of the blocking region of the second blocking portion (50) Expansion joints for concrete slab. The method of claim 1, wherein the first blocking portion 40, It is provided with a guide groove 41 formed in the longitudinal direction on the rear side up and down, and having a fixed rail 42 to be inserted into the lower end of the first body (1) in the center of the front, the first body (1) on both sides Stretch joints for concrete slabs, characterized in that provided with a pair of supporters 43 are spaced apart at intervals that can accommodate the bottom thickness of the). The method of claim 1, wherein the second blocking portion 50, Upper and lower installation grooves 52 and 53 which are spaced at predetermined intervals at both centers of both sides of the body 51 and opened to both sides of the upper and both sides thereof are provided, and are composed of a rectangular plate body 541 to be inserted into the lower installation grooves 53. The lower support member 54 is formed by placing the support boss 542 in a suitable position spaced apart from the upper surface by a predetermined interval, the spring 55 is seated on the support boss 542, the upper portion of the spring 55 When the slide is inserted 90 degrees from one side opening of the upper installation groove 52 and rotated 90 degrees, the upper support member 56 is caught by the upper projection 531 to support the upper portion of the spring 55, the upper installation Expansion joint for the concrete slab, characterized in that the sealing member 57 is formed so as to bulge at least two times higher than the depth of the groove 52 is expanded and contracted by the support force of the spring 55 when the concrete shrinks and expands ashes. The upper support member 56 of claim 3, Stretch joints for concrete slabs, characterized in that the starch is melt-molded when water penetrates.