JPH06158872A - Water leakage stopping method for concrete structure - Google Patents

Abstract

PURPOSE:To prevent secondary water leakage to eliminate the cause of water leakage completely by identifying the route and cause of water leakage of a concrete structure as clearances around reinforcements which are caused in concrete depositing and filling water sealing agent directly into the clearances to close them to shut off the routes of water. CONSTITUTION:The arrangement and cover of reinforcements around water leaking areas are examined using a reinforcement detector, and water sealing agent is filled pressingly into clearances 3 around the reinforcements 2. In this case, a conduit pipe of proper length is used to press it directly into the space 3 around the reinforcements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-stopping agent press-fitting method for stopping leakage of water from splices and cracks in concrete structures.

[0002]

2. Description of the Related Art A conventional method for stopping leakage of water generated in a concrete structure is to cut the concrete surface into a V-shape along a leaking crack or splice and fill it with water-stopping mortar. Alternatively, directly inject an injection hole into the leaking location (crack, splice) or press in a waterproofing agent, or attach a pressurizer to the concrete surface at the leaking location (crack, splice) to stop the water. For example, press in the agent. All of these are construction methods that stop leakage at the outlet.

[0003]

The conventional method was based on the problem of how to close the cracks or splices at the water outlet. This is a countermeasure, and it is difficult to make a fundamental improvement by cutting off the water intrusion part and the route, and often the route is not cut off even if the water at the water outlet crack or splice is stopped. Water leakage (secondary water leakage) started again from another crack or a splice that was an extension of the splicing that stopped water. In order to solve this, it is necessary to stop the water at the entrance or block the water path. In the conventional construction method, in order to solve this problem, a water blocking agent was press-fitted by opening an injection hole in the crack or joint, but when the injection hole was directly opened in the crack, the angle of the injection hole was changed to the concrete of the crack. It is impossible to always match the internal angle, and moreover, it is not possible to accurately target the location of the leak and the route (void) of the leak, and it is only possible to open the injection hole randomly. In this case, if the injection hole does not hit the unfilled portion (void) of concrete, there is no escape area for the pressure, and the injection hole is often damaged by the pressure. Also, if the opening of the concrete surface for cracks or splices is large, the concrete surface will be weak when pressure is applied, so the waterproof agent will spray from the immediate side of the injection hole, and the waterproof agent will not reach the deep part of the concrete. , I couldn't do a stable press fit.

[0004]

[Means for Solving the Problem] Conventionally, it has not been theoretically considered that there is a gap between concrete and reinforcing bars, but when observing the area around the reinforcing bars when the concrete structure is destroyed,
Voids are often identified. In the present invention, this void is considered as a water path. A waterproofing agent is directly injected into a deep part of the concrete structure of this route, that is, near the place where water is invading, and the water intrusion part and route are blocked to fundamentally solve the cause of water leakage. . For this,
Using a reinforcing bar detector, check the bar arrangement position and covering around the leaked part, open an injection hole at the crossed part of the reinforcing bar around the leaked part, positively aim for the void around the reinforcing bar, and put the waterproofing agent there. Are pressed in (Figs. 1 and 2). At this time, in order to directly press-fit into the peripheral area of the reinforcing bar, a guide pipe (outside diameter is the same size as the inside diameter of the injection hole) of the same length as the distance from the concrete surface to the reinforcing bar is driven in, and the injection nozzle is inserted and pressed in (Fig. 3).

[0005]

[Operation] Using a reinforcing bar detector, check the position of the reinforcing bar in the concrete, and in order to press the waterproofing agent directly into the void around the reinforcing bar, there is an escape area for the pressure of the waterproofing agent, so the injection hole is damaged. It can be confirmed that if the injected water-stopping agent is press-fitted until it leaks from the leaking cracks and splices, it can be confirmed that the water leakage has been completely stopped. In addition, since the water blocking agent is pressed into the water path in the deep part of the concrete by the guide pipe and the path is cut off, it is possible to prevent the water from moving (secondary water leak) to the site where water is not leaking.

[0006]

[Example] When stopping the leakage of water from a crack, the position of the reinforcing bar around the leakage point and the covering of the reinforcing bar are investigated using a reinforcing bar detector. At this time, the reinforcement positions are marked on the concrete surface (Fig. 2). Using this bar arrangement position and the covering of the reinforcing bar as a guide, make an injection hole at the place where the reinforcing bar crosses around the crack. This is because it is most likely that there will be voids at this site. A guide pipe having the same length as the covering of the reinforcing bar (the outer diameter is the same as the inner diameter of the injection hole) is driven into this injection hole.
An injection nozzle is inserted there, and a waterproofing agent is press-fitted by a press-fitting pump (Figs. 1, 2, 3). When the concrete structure has an outer wall, it is possible to confirm the blockage of the water path (void) by confirming that the waterproof agent is sprayed on the outer wall or the crack of the inner wall is sprayed. I can. When the concrete structure is in the ground, the waterproof agent is ejected from the cracks, or if the leaked water subsides, the waterproof agent is pressed into the deep part of the concrete structure by the guide pipe. Inevitably, the water path (void) is blocked.

When water leakage from a splice is to be stopped, as in the case of cracks, the positions of the reinforcing bars around the leakage point and the covering of the reinforcing bars are investigated using a reinforcing bar detector, marked, and the positions where the injection holes are drilled are determined. , A water blocking agent is press-fitted using a guide pipe (Figs. 3 and 4).

[0008]

EFFECTS OF THE INVENTION A stable press-fitting is possible because a direct press-fitting is made to a void in advance, and a secondary water leak can be prevented because the route of the leaking water is blocked. By using the guide pipe, it is possible to freely select where to press into the concrete according to the situation.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a water leak portion of a concrete structure.

FIG. 2 is a plan view taken along the line AA of FIG.

FIG. 3 is a sectional view of an injection hole.

FIG. 4 is a cross-sectional view of a water leak portion of a concrete jointing portion.

[Explanation of code] Concrete structure Reinforcing bar Crack Injection hole Marking Void Injection nozzle Guide pipe Splice

Claims (2)

[Claims] 1. A crack caused in a concrete structure and a cause of water leakage from the joint are determined to be a void between the reinforcing bar and the concrete generated during the joint and the concrete placing, and the position of the reinforcement around the crack and the joint is determined. Check with a reinforcing bar detector, open an injection hole aiming at the void around the reinforcing bar, and press the waterproofing agent into it. 2. At this time, a water guiding agent having a proper length (the outer diameter of which is the same as the inner diameter of the injection hole) is inserted into the injection hole at a distance from the concrete surface to the reinforcing bar. The pressure that is injected is applied directly to the void near the rebar.