JPH0379498B2 - - Google Patents

Description

[Detailed description of the invention]

[Field of Application of the Invention] The present invention relates to a repair method for a roof waterproof structure. [Background of the Invention] Conventionally, the roof waterproof structure shown in FIG. 1 is known. That is, a waterproof layer 3 is interposed between a base 1 made of concrete or the like and a holding layer 2, and the ends 4 of the waterproof layer 3 are connected to the flange 6 of the drain hollow lower plate 5 and the flange 8 of the drain hollow upper plate 7. It has a structure in which it is sandwiched between In general, roof waterproof structures are affected by external stress caused by unavoidable factors such as changes in temperature and humidity, uneven settlement of the building itself, natural disasters such as earthquakes, and the coefficient of thermal expansion between reinforcing bars embedded inside the foundation and concrete. The internal stress caused by the difference in
Erosion is caused by acidic rainwater contaminated by automobile exhaust gas and industrial smoke. Such stresses, erosion, and a number of other causes can cause cracks in the roof structure. Cracks often occur concentrated around the drainage drain, and rainwater may enter or leak through these cracks. Conventionally, in such cases, the presser layer 2 was peeled off, the cracks, etc. were repaired, and the structure was restored to the same state as before. However, in this repair method, the presser layer 2 is peeled off over the entire surface, resulting in a large number of repair man-hours. Therefore, the following repair methods are used to reduce the number of repair steps. That is, from the state shown in FIG. 1, the hollow upper plate 7 and the presser layer 2 around it are removed (the removed state is shown in FIG. 2).
Next, as shown in FIG. 3, the removed space is filled with resin mortar 10, and a new waterproof layer 11 is further laminated on the presser layer 2 and the filled resin mortar 10. Then, the end 12 of the new waterproof layer 11 is held between the flange 6 of the drain hollow lower plate 5 and the flange 8 of the drain hollow upper plate 7. However, in this repair method, there is no place for the moisture contained in the holding layer 2 to escape, and as a result, the new waterproof layer 11 swells. [Object of the Invention] The present invention has been made with the aim of improving these drawbacks of conventional repair methods. [Summary of the Invention] In the repair method of the present invention, a waterproof layer is interposed between the base and the holding layer, and the ends of the waterproof layer are connected to the flange of the drain hollow lower plate and the flange of the drain hollow upper plate. In the repair method for a roof waterproof structure that is stuck, the hollow upper plate and the holding layer around it are removed, the hollow upper plate is placed at a predetermined interval above the waterproof layer, and the hollow upper plate and the hollow plate are separated. Fill the space between the flange and the space after removing the holding layer with water-permeable mortar, layer the new waterproof layer on the holding layer and the filled water-permeable mortar, and insert the end of the new waterproof layer into the air. This is a roof waterproof structure repair method characterized by attaching a hollow upper plate by sandwiching it between the flange of the plate and the flange of the hollow upper plate. In the structure to be repaired by the present invention, a waterproof layer is interposed between the base and the holding layer, and the ends of the waterproof layer are sandwiched between the flange of the hollow drain lower plate and the flange of the drain hollow upper plate. The roof has a waterproof structure. The base is made of, for example, concrete, and the holding layer is made of, for example, concrete or mortar. Further, the structure to which the present invention is symmetrical includes one in which leveling mortar is interposed between the waterproof layer and the base layer and/or the holding layer, or one in which finishing mortar is laminated on the holding layer as necessary. The waterproof layer here is not limited by its type, material, etc. It may also be one that has lost its function as a waterproof layer. The hollow lower plate is for guiding water that has passed through the upper surface of the hollow upper plate or the drain cap to the drain hole, and there are no particular limitations on its shape and material as long as it has this function. The hollow lower plate is attached to the base, and the means for attaching it is not limited. For example, it may be fixed via an anchor. In the present invention, first, the hollow upper plate and the pressing layer around it are removed. This process is the same as in conventional construction methods. When the hollow upper plate and the surrounding presser layer are removed, the area around the edge of the waterproof layer is exposed. Next, a hollow dish is placed above the waterproof layer at a predetermined interval. The predetermined height is approximately the same height as the pressing layer. Next, the space between the waterproof layer and the hollow dish and the space after the pressing layer is removed are filled with water-permeable mortar. Examples of permeable mortar include cement mortar,
Polymer mortar etc. can be used. Specific formulation examples a to d are shown below.

【table】

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings. Note that, as a matter of course, the present invention is not limited to the following examples. Embodiment 1 FIG. 4 is a sectional view showing a roof waterproof structure to be repaired in this embodiment. In this structure, a waterproof layer 3 is interposed between a base 1 and a pressing layer 2, and a leveling mortar 1' is further interposed between the waterproof layer 3 and the base 1. A leveling mortar 2'' is also interposed between the waterproof layer 3 and the presser layer 2.Furthermore, a finishing mortar 2' is laminated on the presser layer 2.The hollow lower plate 5 is made of It consists of a pipe part 5a and a collar part 6 extending outward and upward from the periphery of the pipe part 5a, and the pipe part 5a is fitted into a drainage hole 15 of the base 1.The hollow lower plate is embedded in the base 1. It is fixed to the base 1 via an anchor 30. On the other hand, the hollow upper plate 7 has a lower peripheral edge of the hollow cylindrical part 7' bent outward, and the bent part becomes the flange part 8. , a drain cap 9 is detachably attached to the upper end of the hollow cylindrical portion 7'.
is fixed to the hollow lower plate 5 with bolts. The end of the waterproof layer 3 is held between the flange 6 of the hollow lower plate 5 and the flange 8 of the hollow upper plate 7. In this embodiment, first, the drain cap 9 is removed, then the bolts are removed, and the hollow upper plate 7 is removed. Next, the finishing mortar 2' is scraped off. Fig. 5 shows the state at the time of cutting. Next, refer to FIG. A hollow dish 12 is placed above the waterproof layer 3 appearing on the surface. This hollow dish 12 consists of a cylindrical portion and a flange portion 12' extending outward and slightly upward from the periphery of the cylindrical portion. The outer diameter of the cylindrical portion is smaller than the inner diameter of the hollow lower plate 5. Therefore, a gap is formed between the outer surface of the cylindrical portion and the inner surface of the lower plate 5, which communicates with the drain hole 15. This gap is contained in the pressing layer 2 and serves as a passage for water flowing through the water-permeable mortar 13. In this embodiment, the hollow dish 12 is arranged as follows. First, a plurality of height adjustment mortar 17 is heaped up on the end of the waterproof layer 3. An anchor 18 is embedded in this height adjustment mortar 17, and the hollow dish 12 is connected via this anchor 18.
Fix it to the height adjustment mortar. Next, the waterproof layer 3 and the flange 12' of the hollow plate 12 are attached.
Water-permeable mortar 13 in the space between the
Fill it with. The filling method does not matter. Next, a new waterproof layer 11 is laminated on the holding layer 2 and the filled water-permeable mortar 13, and the end of the new waterproof layer 11 is connected to the flange 12' of the hollow plate 12 and the flange 8 of the hollow upper plate 7. Attach the hollow upper plate 7 by pinching it. In this embodiment, it is fixed to the hollow plate 12 with bolts. Embodiment 2 FIG. 7 shows a sectional view of a roof waterproof structure for explaining a second embodiment. The object of repair in this embodiment is the roof waterproof structure shown in FIG. In this example, leveling mortar and finishing mortar are not shown. Further, the hollow lower plate 5 and the hollow upper plate 12 are fixed by bending the tips of the respective flanges 6 and 12' downward.
This is done by inserting the bent portion into a base 1 and a water-permeable mortar 13. Other points are similar to the first embodiment. [Effects of the Invention] According to the present invention, a roof waterproof structure can be repaired with a simple number of man-hours. Furthermore, no blistering of the waterproof layer occurs in the structure repaired by the method of the present invention.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional roof waterproof structure. FIGS. 2 and 3 are cross-sectional views for explaining conventional repair methods. 4 to 7 are cross-sectional views for explaining embodiments of the present invention. 1... Base, 2... Pressing layer, 3... Waterproof layer, 4... End, 5... Hollow lower plate, 6... Flange, 7... Hollow upper plate, 8
...Brim part, 9...Cap, 11...New waterproof layer, 12...
Hollow dish, 13... Water-permeable mortar, 15... Drain hole, 17... Mortar for height adjustment, 18... Anchor.

Claims (1)

[Scope of Claims] 1. A roof in which a waterproof layer is interposed between the base and the holding layer, and the ends of the waterproof layer are sandwiched between the flange of the hollow drain lower plate and the flange of the drain hollow upper plate. In the repair method for a waterproof structure, the hollow upper plate and the holding layer around it are removed, the hollow upper plate is placed at a predetermined interval above the waterproof layer, and the hollow upper plate is placed between the waterproof layer and the flange of the hollow hollow plate. Fill the space with water-permeable mortar in the space and the space after removing the holding layer, layer a new waterproof layer on the holding layer and the filled water-permeable mortar, and connect the end of the new waterproof layer to the flange of the hollow plate. A repair method for a roof waterproof structure characterized by attaching a hollow upper plate by holding it between the flange of the hollow upper plate.