JPS5826165A - Repairing of water leakage of concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for repairing water leakage caused by cracks occurring in concrete structures, etc.

In general, when water leaks due to cracks in concrete structures, repairs are required depending on the water leakage pressure, as shown in Figure 1 (α) (
The construction method shown in b) is used.

That is, the frame (1) is hung in a V-shape along the crack (2), a flexible band (4) with a semicircular cross section is laid along the valley (3) with the convex side facing up, and a Solid cement (5)
At the same time, place the adhesive injection pipe (6) in contact with the tip or the flexible band (4), and set it so that the other end faces outside of the frame (1), so that the quick-setting cement (5) is semi-hardened. At this stage, the flexible band (4) is pulled out, and when the quick-setting cement (5) has hardened, resin mortar (force) is applied to the outside of it, and adhesive is filled into the crack (2) using the pipe (6). Repairs were being carried out.

However, in this repair method, in order to form a leakage guide hole, a flexible band with a semicircular cross section is used as a formwork and is later pulled out, so (a) quick setting cement The flexible band must be pulled out when the material is semi-hardened, and it is impossible to form a long guide hole.

(b) Since the V-shaped hanging surface is rough and the flexible band is held down by quick-setting cement, it is difficult to pull it out due to resistance.

(c) Cracks rarely appear in a straight line, making extraction work that much more difficult.

2) It is difficult to grasp the semi-hardened state of quick-setting cement, making it difficult to determine when to pull out the flexible band.

Due to such problems, the flexible band should be made shorter (about 15α to 50n).
The work had to be carried out as a single unit, resulting in extremely poor work efficiency.

The present invention aims to overcome the drawbacks of conventional crack water leakage repair methods and provide a repair method with extremely high work efficiency.

That is, when repairing water leakage in a concrete structure, the present invention cracks the water leakage point in the structure (11).
A tube α force having a mesh wall structure is installed in the trough Q3) of the groove in a V-shape along the outside of the tube, with its tip abutting against the tube wall αa and the other end facing outward. 0 pipes for injection of adhesive are placed, and quick setting cement o6) is embedded to form a guide hole for water leakage using tube 04) and water is temporarily stopped on the surface, and pipe o9 is fixed, and Resin mortar a'7) is embedded on the outside of cement α6) and hardened, and then pipe (1
5) Press the adhesive into the opening using an adhesive filling machine (not shown) from the outer end of the tube, enter the adhesive into the crack 02 through the 14+ mesh, and cure the water leakage. (See Figure 2).

In this way, in the construction method of the present invention, when forming a leakage guide hole with quick setting cement and temporarily stopping water,
Since the mesh tube can be left as is and the adhesive can be press-fitted through the mesh, there is no need to pull out each unit length of the flexible band as in the conventional method.

Therefore, even if the water leakage point is long or bent, the entire length can be filled with quick setting cement at once, and the work efficiency is extremely improved.

In addition, in cutting work, in the conventional method, it was necessary to make the opening of the cut larger to make it easier to pull out the flexible band, whereas in the method of the present invention, the opening of the V-cut is ■The cutting work can be completed in a short time, and the amount of quick setting cement and resin mortar used can be reduced by making the opening smaller, reducing material costs. be able to.

In the above description of the construction method, a tube with a mesh wall is used, but a large number of holes may be bored in the tube wall. Further, although the adhesive injection pipe is set at the time of embedding the quick-setting cement, the adhesive injection hole may be drilled so as to reach the tube when the quick-setting cement hardens or the resin mortar hardens.

Note that the adhesive may be press-fitted after the resin mortar has hardened, as described above, or may be injected before the resin mortar is embedded. In the former case, it is necessary to perform surface treatment on the hole after press-fitting to ensure that the mortar etc. will not be destroyed by the pressure of the adhesive; in the latter case, although there is no need for surface treatment, the pressure of the adhesive may cause sudden damage. Strength must be considered in advance to prevent cement from breaking.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a water leakage point showing the conventional construction method, and FIG. 2 is a sectional view of a water leakage location showing the construction method of the present invention. (12)------Crack, α scolding---■Cut valley, (14)------Single-mesh tube, α6)----
Quick setting cement, (17) --- Resin mortar patent applicant Konishi Co., Ltd.

Claims (3)

[Claims] (1) Draw a V-shape around a leaking point in a concrete structure, etc., and use quick-setting cement to form a guide hole for leaking water along the valley, and temporarily stop the water from reaching the surface.
In this method, repair is performed by injecting adhesive into the crack through a guide hole before or after embedding resin mortar on the outside. A tube with a mesh or perforated wall is laid in the valley and quickly tied to the outside. A construction method characterized by filling cement to form guide holes and press-fitting adhesive through the mesh or hole of the tube. (2) When embedding quick-setting cement, place the adhesive injection pipe in 1 so that one end and the other end in contact with the tube wall face outward, and place the pipe outside the pipe before or after embedding the resin mortar. The method according to item 1, from one end to the crack through the mesh or hole of the tube. (3) The construction method according to claim 1, wherein a hole reaching the tube wall is made with a drill or the like after the quick setting cement has hardened or the resin mortar has hardened.