JP4357914B2 - Joint structure for joints of waterproof sheet - Google Patents

Description

The present invention relates to a joint structure for a waterproof sheet and a construction method for the joint structure.
That is, when constructing a waterproof structure by constructing a waterproof sheet on the base, the waterproof sheet is laid and arranged on the base at regular intervals, and a room temperature curable sealing agent is placed in the gap between the separated waterproof sheets. The present invention relates to a joining structure of a connecting portion of a waterproof sheet, which is injected and cured, and a waterproof sheet and a waterproof sheet are integrated and bonded, and a construction method thereof.
The waterproof structure according to the present invention has an excellent effect in waterproofing a roof using a waterproof sheet, the upper surface of a building, and other structures, and can also perform construction work rationally.

The sheet waterproofing material used in the sheet waterproofing method is manufactured as a standard waterproof sheet at a factory using synthetic rubber, synthetic resin, modified asphalt or the like having excellent stretchability as a main raw material.
The following are known as such waterproof sheets.
One of them is a modified asphalt tarpaulin.
Conventionally, waterproofing work using a modified asphalt sheet, a modified asphalt sheet of a predetermined width manufactured in a factory in advance, on the base surface that is primed if necessary, so that there is no gap between the modified asphalt sheet, This sheet side edge is arranged so that it overlaps with a predetermined width, and the overlapped jointed modified asphalt sheet is melted with a torch lamp and welded, and the overlapped part is brought into close contact with water. Avoid penetration.
The waterproof construction using the modified asphalt sheet has the advantage that the construction is simple and the construction period is short. However, in this method, it is difficult to heat the joints uniformly and stably with a torch lamp. Holes are formed by melting due to excessive heating, and the joints are not evenly bonded due to insufficient heating. There are drawbacks that cause drainage.

Other waterproof sheets include a synthetic resin or a synthetic rubber waterproof sheet.
In waterproofing work using these sheets, a synthetic resin or synthetic rubber waterproof sheet having a predetermined width manufactured in advance at a factory is applied to one surface of these sheets, and after application, this coated surface is applied to the waterproof sheet. Arrange them on the base surface with primer treatment or adhesive as necessary so that the side edges have a predetermined width and do not generate gaps, and then connect the joints with adhesive, adhesive tape, hot air, synthetic resin or synthetic A rubber tarpaulin is adhered to prevent water from penetrating.
This method has the characteristic that the performance of the waterproof sheet is uniform, but the seam is often bonded using an adhesive, adhesive tape or hot air, so that the seam often does not become uniform. Causes water.

  In addition, in waterproofing work using such a waterproof sheet, in order to treat the place where the base has a vertical part like a parapet, auxiliary materials such as face wood having a triangular cross section are installed at the corner part, Install a waterproof sheet on the horizontal surface up to the edge of the faceplate, while installing a waterproof sheet that covers the vertical surface so that it touches the faceplate, and overlap the side edge with the side edge of the waterproof sheet on the horizontal surface. However, a method has been adopted in which this part is melt-bonded, the upper part is drained, and a protective layer is provided. However, these constructions are difficult to process, and various problems have occurred.

That is, in a conventional waterproofing method using a waterproof sheet, a so-called “overlap connection method” has been employed for connecting the waterproof sheet and the waterproof sheet.
The “joining of the waterproof sheet and the waterproof sheet” by this overlapping method differs depending on the material of the waterproof sheet, but the following method has been performed.
1. Heat fusion: For rubberized asphalt, etc., heat with a torch, melt and bond.
2. Hot air fusion: Bonded to PVC sheet (vinyl chloride sheet), TPO sheet (thermoplastic elastomer sheet), ECV sheet (ethylene vinyl acetate sheet), HDPE sheet (ethylene sheet) using hot air fusion machine To do.
3. Welding; Adhering to PVC sheet using solvent.
4). Adhesion: HDPE sheet, PVC sheet, TPO sheet, etc. are used and adhered using an adhesive or adhesive tape.
Also in these joining methods, in order to improve the wind pressure resistance of the waterproof sheet, a method of mechanically fixing the waterproof sheet to the base using a resin anchor or screw is also taken.

However, the waterproof sheet and the construction method thereof having these overlapping structures have the following problems.
1. Because it uses fire, heat, and solvent, it is dangerous to work.
2. Since the two or three waterproof sheets overlap each other in the overlapping connection of the waterproof sheets, a gap is generated inside the overlapping connection part, and it is difficult to ensure watertightness.
3. There is no way to confirm that the lap joints have been securely constructed.
4). When the sheet waterproof material is bonded, the sheet waterproof material melted by heat and solvent is likely to cause shrinkage (stress) of the sheet waterproof material while curing, which is likely to cause a problem in long-term durability.
5. The quality of the finish depends on the skill level of the operator.
6). In the mechanical fixing method, the waterproof sheet is fixed to the base with anchors, screws, etc., so if the fixing bracket breaks at one fixed location, it extends to other locations and wind pressure resistance to a wide area. May cause problems.
As described above, there are various problems in the sheet waterproofing method having a lap joint structure using a conventional sheet waterproofing material.

  An object of the present invention is to solve a problem of “stacked joining” of waterproof sheets, which has been conventionally performed, and is excellent in quality, capable of uniform waterproofing, and excellent in wind pressure resistance It is providing the joining structure of this connection part, and the construction method of this joining structure.

The present inventors have intensively studied to solve the above-mentioned problems, and found a waterproof structure connecting structure that can be constructed by a method that gives excellent quality and is excellent in workability in a waterproof structure using a waterproof sheet. The present invention has been completed.
That is, the present invention
1. A. A waterproof sheet installed on the base with a certain gap, B. A fibrous reinforcing material provided so as to cover the gap, and C. A waterproof structure comprising the above-described gap or a waterproof layer that is filled with a room-temperature-curable sealing agent that is sufficient to fill the gap and the lower side edge of the gap and hold the fibrous reinforcement so as to wrap. Connecting part joining structure of the sheet,
2. The waterproof sheet connecting portion bonding structure according to claim 1, wherein the waterproof sheet is a modified asphalt sheet, a synthetic rubber-based sheet, or a synthetic resin-based sheet.
3. The joint structure of a waterproof sheet according to claim 1, wherein the fibrous reinforcing material is a woven fabric, a non-woven fabric or a cloth made of inorganic or organic fibers,
4). The joint structure of a waterproof sheet connecting portion according to claim 1, wherein the fibrous reinforcing material is an inorganic or organic fiber reinforcing cloth to which an adhesive is attached,

5. A waterproof sheet is installed on the base with a certain gap, a fibrous reinforcing material is installed along the gap and covering the gap, and the gap or the lower side edge of the gap and the gap is placed. Filling and covering the fibrous reinforcing material with a sufficient amount of a room temperature curing type sealing agent from above the fibrous reinforcing material, applying or impregnating it to cure, and bonding and connecting the waterproof sheet The construction method of the joint structure of the connecting part of the waterproof sheet,
6). A waterproof sheet is installed on the base with a certain gap, and a room-temperature curable sealing agent is injected in an amount sufficient to fill the gap or the gap and the lower side edge of the gap. Place a fibrous reinforcing material over the side edge of the waterproof sheet with a gap, and install a sufficient amount of room temperature curable sealing agent to cover the fibrous reinforcing material from above the installed fibrous reinforcing material. Applying or impregnating and curing, bonding the waterproof sheet, connecting the waterproof sheet, the construction method of the joint structure of the connecting portion of the waterproof sheet,
7). On the base, a waterproof sheet is installed with a certain gap, the side edge of the gap corresponding to the connecting part of the waterproof sheet is once opened, and a room temperature curable sealing agent is applied to the open part on the base, Install the fibrous reinforcing material along the side edge of the waterproof sheet with the gap sandwiched between the waterproof sheet formed by returning the waterproof sheet to the original, and this installed fibrous form It is characterized by filling the gap between the waterproof sheets from above the reinforcing material and injecting, applying or impregnating a sufficient amount of room temperature curable sealing agent to cover the fiber reinforcing material, curing it, and bonding and connecting the waterproof sheets Construction method of connecting part joint structure of waterproof sheet,
8). The waterproof sheet is a modified asphalt sheet, a synthetic rubber-based sheet, or a synthetic resin-based sheet.
9. The construction method of the joint structure of the waterproof sheet according to any one of 5 to 7, wherein the fibrous reinforcing material is a woven or nonwoven fabric of glass fiber or a woven or nonwoven fabric of synthetic fiber,
10. The construction method of the joining part joining structure of the waterproof sheet according to any one of 5 to 7, wherein the fibrous reinforcing material is an inorganic or organic fiber reinforcing cloth to which an adhesive is attached,
11. A waterproof sheet installed on a base where surfaces having different angles are connected, with a gap at a line where each surface intersects, a fibrous reinforcing material provided so as to cover the gap, and the gap Or, a waterproof sheet comprising a structure containing a cured waterproof layer by injecting a sufficient amount of a room temperature curable sealing agent to fill the gap and the lower side edge of the gap and hold the fibrous reinforcing material. Connecting part joint structure,
It is.

The waterproof structure having the joint structure of the waterproof sheet according to the present invention has a joint portion that is firmly joined and is excellent in joining with a base.
The unique connecting part joining structure of the present invention allows solid sheets to be closely bonded and cured at the joint using a liquid or viscous liquid room temperature curable sealing agent. Compared to the method of melting and bonding the sheet itself with heat or a solvent, the sheet is firmly connected and an excellent waterproof effect is obtained. Moreover, compared with the conventional mechanical fixing method in which the waterproof sheet is fastened with dots to provide resistance to wind pressure, the waterproof sheet is bonded and fixed on a wide surface on the base, and thus is excellent in wind pressure resistance. These are simple and can be reliably constructed.

Hereinafter, the present invention will be described in detail.
In the present invention, the term “base” refers to waterproofing with waterproof sheets such as mortar, concrete, asphalt, metal parts and wooden parts that require waterproofing, such as roofs of buildings, rooftops, balconies, walls, floors, and parking lot floors. This is the base to be applied.
The base may be a horizontal surface, an inclined surface, or a vertical surface, and these surfaces may be composed of two or more surfaces having different angles.
Further, in order to enhance the bondability with the waterproof sheet, the substrate surface may be subjected to a treatment such as a primer or coating that is usually performed prior to the construction of the waterproof sheet.
These treatments are not specified, and can be performed by materials and methods that are usually applied to the construction of waterproof structures using waterproof sheets. Particularly preferably, the primer used is a urethane-based material.

As the waterproof sheet used in the present invention, various types of waterproof sheets can be used including known materials that exhibit a waterproof effect applied to the sheet waterproofing method.
As a known waterproof sheet, for example, a modified asphalt sheet, a synthetic rubber-based sheet, a synthetic resin-based sheet, a sheet in which these sheets are coated with a primer or other material, or the surface or the front and back of the sheet A composite waterproof sheet in which woven fabrics or nonwoven fabrics of various fibers are spread on both sides can be used.
A composite waterproof sheet in which a woven or non-woven fabric of natural or synthetic fibers is spread is preferable.

Next, the room-temperature curable sealing agent used in the present invention is a liquid or viscous liquid at the time of construction, and has the effect of curing after construction and bonding the waterproof sheet, forming a waterproof layer that fills the gap between the waterproof sheets To do.
Examples of such room temperature curable sealing agents include polyurethane, rubber asphalt, and acrylic emulsion.
The room-temperature curable sealing agent that can be preferably applied in the present invention is a polyurethane-based sealing agent, which is a known one and is not particularly limited. One-component or two-component polyurethane-based room temperature curable sealing agents are preferably used.

  The waterproof structure including the joint structure of the waterproof sheet according to the present invention is further subjected to a construction in which a waterproof film is applied and a waterproof layer is laminated. Any waterproof coating material can be used without particular limitation as long as it has good compatibility with a room temperature curable sealing agent and forms a coating film having excellent waterproofness and adhesiveness. For example, urethane film waterproofing material is frequently used.

The fibrous reinforcing material used in the present invention is not particularly limited, and inorganic or organic fiber woven fabrics, nonwoven fabrics, knitted fabrics, nets or cloths can be used.
Examples of inorganic fibers include carbon fibers, glass fibers, and asbestos. Examples of the organic fiber include general natural fibers such as hair, nylon, cotton, hemp, polyester, and acetate, synthetic fibers, and semi-synthetic fibers.
As the fibrous reinforcing material, one having an appropriate shape is appropriately selected and used depending on the form of the connecting portion structure. For example, a fiber reinforcing material that is a woven fabric or a non-woven fabric has a waterproof sheet connecting portion structure, and the waterproof sheets are arranged in a row at a predetermined interval, and then a predetermined amount of room temperature is applied to the joint portion. This is effective in the case of a connection structure in which a curable sealing agent is filled and a fibrous reinforcing material is placed thereon.
Further, the knitted, net or cloth-like fiber reinforcing material, preferably, the cloth-like fiber reinforcing material to which an adhesive is attached is used to form the connecting portion structure of the waterproof sheet, after the waterproof sheet is installed, Cover the joints with the fibrous reinforcing material, stably stick and fix the adjacent waterproof sheets, and apply a predetermined amount of room temperature curable sealing agent through the weave or mesh from the top of the fiber reinforcing material. It can be used as a preferred reinforcing cloth by the injection method.
In addition, as one aspect of the present invention, the waterproof sheet installed on the base may be bonded to the base with a double-sided adhesive sheet at the peripheral edge of the gap between the waterproof sheets. As the double-sided adhesive sheet used at this time, a waterproof sheet and a sheet exhibiting adhesiveness to the base surface are not particularly limited, and commercially available ones can be appropriately selected and used.

Hereinafter, the joining part joining structure and construction method of the waterproof sheet of the present invention configured using these materials will be described with reference to the drawings.
FIG. 1 is a view showing a waterproof structure including a connecting portion connecting structure according to the present invention (referring to a waterproof structure including a “connecting connecting structure of the present invention” using a waterproof sheet).
FIG. 2 is an enlarged cross-sectional view showing the connecting portion joining structure of the present invention.
The base (1) of the waterproof structure is a base of a building that requires waterproof construction made of asphalt, mortar, concrete, cement, or the like.
The surface may or may not be provided with a primer or coating (11) by a known method if necessary.
The primer which may be preferably implemented in the present invention may be that a waterproof sheet is installed and a room temperature curable sealing agent is applied to a portion corresponding to a joint. Moreover, you may apply | coat the primer material which provides moderate adhesiveness to the whole surface on a base | substrate, or a required surface.
On such a base (1) surface, the required number of waterproof sheets (preferably composite waterproof sheets) (2) manufactured to a predetermined width are arranged side by side in accordance with the construction of the waterproof structure. The waterproof sheets (2) are installed so as to be separated from each other by a desired gap (3) without overlapping each other.
The width of the gap (3) between the waterproof sheets is not particularly limited, but is a width within a range where the waterproof sheets do not overlap even if the waterproof sheets are extended under use conditions. Usually, 5 to several tens of mm is sufficient.
Into the gap (3) between the waterproof sheets formed in this way, a normal temperature curable sealing agent (4) is injected and cured to adhere the waterproof sheet.

The joint structure of the connecting portion of the waterproof sheet of the present invention shown in the sectional view of FIG. A waterproof sheet (2) installed on the base (1) with a certain gap (3); A fibrous reinforcing material (5) provided so as to cover the gap, and C. A structure containing a waterproof layer in which the room temperature curable sealing agent (4) is injected and cured in an amount sufficient to fill the gap or the lower side edge of the gap and the gap and hold the fibrous reinforcing material. Consists of.
This connection part joining structure is covered with the fibrous reinforcing material (5) in a state where the basic mode is along the gap (3) of the waterproof sheet (2) on the base (1) and covers the gap, and the waterproof sheet A sufficient amount of the room temperature curable sealing agent (4) is injected, applied or impregnated so as to tie each other, wrap the fibrous reinforcement, and fill the gap (3), and cure the room temperature curable sealing agent. Adhere and connect the waterproof sheet.
However, the present invention is not limited to this mode, and the order of the construction for covering the gap with the fibrous reinforcing material (5) and the construction for injecting, applying or impregnating the room temperature curable sealing agent may be first.
That is, even if the gap (3) is filled with the room temperature curable sealing agent (4) and covered with the fibrous reinforcement (5), or the gap is covered with the fibrous reinforcement (5), the room temperature is applied from above. A curable sealing agent may be injected.
The injection of the room temperature curable sealing agent is not particularly limited, but if it is applied with some pressure, it is allowed to enter under the waterproof sheet (2) at the lower peripheral edge of the gap (3) to form the base (1) and the waterproof sheet. The adhesion surface of (2) can be increased.
In the cross section of the connecting portion between the waterproof sheets by such a method, the room temperature curable sealing agent injected into the gap (3) forms a shape like an “I” shape at the gap and the upper and lower ends connected to the gap. The waterproof sheet, the waterproof sheet and the substrate, and the waterproof sheet and the fiber reinforcing material are firmly bonded to form a strong and excellent waterproof layer. In addition, this method makes it possible to easily construct a waterproof structure having good wind pressure resistance and excellent waterproof properties.

As the fibrous reinforcing material (5) to be used, a preferable one can be selected according to a specific embodiment to be constructed.
There is no limitation in particular in the method of constructing a fiber reinforcement so that the clearance of a waterproof sheet may be covered.
In particular, the use of a reinforcing cloth to which an adhesive is attached is preferable from the work surface because it can be applied across the gap between the provided waterproof sheets and the waterproof sheet can be stably held during construction of the waterproof sheet.
Further, regardless of the type of fibrous reinforcing material used and regardless of the construction method, the method of injecting the room temperature curable sealing agent (4) into the gap (3) is not particularly limited, and basically Is sufficient to fill and fill the gap with an amount sufficient to fill the gap, and to apply or impregnate an amount sufficient to hold the fibrous reinforcement. Specifically, it is carried out by an injection addition method in which the fiber reinforcing material is sequentially poured along the gap.

The method for forming the joint structure of the connecting portion is not particularly limited, but examples of specific embodiments include the following methods.
One of them is filling the gap (3) with a sufficient amount of a room temperature curable sealing agent (4) to fill the gap and then filling the fiber reinforcement (5) over the gap (3). Cover the side edges of the waterproof sheet, and apply or impregnate a room-temperature-curable sealing agent (4) in an amount sufficient to hold the fiber reinforcement so as to wrap it. As the fiber reinforcing material used in this method, any of a sheet-like or tape-like woven or non-woven fabric, or a knitted fabric may be used.
Another method is to install a cloth-like fiber reinforcing material on the gap (3), and in this case, if the fiber reinforcing material is a cloth-like fiber reinforcing material to which an adhesive is attached. The waterproof sheet can be fixed firmly and stably during construction. Thereafter, a room temperature curable sealing agent (4) is injected from above the cloth-like fiber reinforcing material in an amount sufficient to hold the fiber-like reinforcing material so as to fill the gap (3).
In these methods, the injection construction method for filling the gap with the room temperature curable sealing agent is not particularly limited, but basically, the gap is mechanically using an injector or manually. The amount necessary to fill the fiber and the amount sufficient to wrap the fiber reinforcement is injected and filled from above.
By this method, the room temperature curable sealing agent penetrates to the lower side edge of the gap (3), and an increase in the contact surface between the base (1) and the waterproof sheet (2) is achieved.

Furthermore, as another method, in order to further increase the contact surface between the base (1) and the waterproof sheet (2), the waterproof sheet (2) corresponding to the connecting portion (gap (3)) of the sheet laid on the base surface ) Side edges are lifted once (turned), a room temperature curable sealing agent is applied and spread on the base of the opened part, and then the waterproof sheet is returned to the gap formed by the fiber reinforcement ( 5) The above-mentioned method of covering with (5) and injecting the room temperature curable sealing agent (4), or injecting the room temperature curable sealing agent into the gap and covering with a fiber reinforcement, and further applying or impregnating the room temperature curable sealing agent Install in.
In this method, since the contact area between the waterproof sheet and the base can be increased, it is possible to further improve the bonding and wind pressure resistance of the constructed waterproof structure.
In the connection part bonding structure of the present invention, a waterproof structure is obtained by further laminating a waterproof coating layer (6) made of a room temperature curable waterproof membrane.

  Furthermore, as a different embodiment, as shown in FIG. 3, the double-sided adhesive sheet (312) is adhered and installed on the base (301) at a location corresponding to the gap (303) of the waterproof sheet, and then the waterproof sheet ( 302) is laid with a waterproof sheet so that a gap (303) is formed on the double-sided adhesive sheet, and the gap is constructed with a fiber reinforcing material (305) and a room temperature curable sealing agent (304) according to the above method. It can also be set as the connection part joining structure of a waterproof sheet. In this construction, the waterproof layer formed by filling the gap (303) of the waterproof sheet and being formed of the room temperature curable sealing agent (304) together with the fiber reinforcing material (305) is in contrast to the so-called “I” shape. Although it forms a T "shape, it has good strength and waterproofness.

  Moreover, the connection part joining structure of this invention is preferably applicable also to the base | substrate with which the surface from which an angle differs continues. For example, when constructing the connecting portion joint structure of the present invention at a place where there is a parapet as shown in FIG. 4, a waterproof sheet (402) is installed on a horizontal base (401) and one vertical base is provided. (411) is covered with a waterproof sheet (412), and the two waterproof sheets are placed with a gap (403) between them without overlapping. A normal temperature curable sealing agent (404) is poured into the gap and filled, and a fiber reinforcing material (405) is placed thereon, and then a normal temperature curable sealing agent is applied and impregnated thereon, or the gap A fiber reinforcing material is placed on the top, and a normal temperature curable sealing agent is injected from above, and cured, adhered, and connected to the waterproof sheet. A waterproof structure (406) made of a room temperature curable coating film waterproof material is further laminated on the obtained waterproof sheet to obtain a waterproof structure.

As another example, as shown in FIG. 5, the waterproof sheet (502) is placed on a horizontal base (501), and a fixed gap (503) is provided between the end of the sheet and the vertical base (511). The room temperature curable sealing agent (504) is injected into the gap (503) and the fiber reinforcement (505) is covered as shown in FIG. A curable sealing agent can be injected to form a connecting portion joining structure in accordance with the above. A waterproof structure (506) made of a room temperature curable coating film waterproofing material is further laminated on the horizontal waterproof sheet and the vertical base including the obtained connecting portion joining structure portion to obtain a waterproof structure.
In addition, even when waterproofing is performed with a waterproof sheet on the rooftop where the ventilation tower is located, a waterproof sheet in which the position of the ventilation tower is hollowed out is installed, and a room temperature curing sealing agent and a fiber reinforcing material are provided between the tower and the waterproof sheet. The joint structure is formed by filling and curing with, and a waterproof structure is obtained by laminating a waterproof layer of a room temperature curable coating film waterproof material on the side surface of the ventilation tower and the waterproof sheet.
In the conventional lap connection method, it was difficult to hold the waterproof sheet in such a place during construction of the waterproof sheet or to weld the waterproof sheet lap joint part, The waterproof construction of such a part can be easily carried out, and the waterproof structure is excellent in strength and waterproofness.

In the present invention, if the material of the waterproof sheet and the material of the room temperature curable sealing agent used are the same, there is no problem in adhesion between the two, and an integrated waterproof structure can be obtained.
Examples of such materials include a sheet waterproof material made of rubberized asphalt, a room temperature curable sealing agent made of rubberized asphalt, a sheet waterproof material made of polyurethane, and a liquid waterproof material made of polyurethane or polyurea. .
Moreover, when the material of a waterproof sheet and the material of a liquid waterproof material differ, the material which has favorable adhesiveness between both is selected. In addition, a waterproof sheet to which a fiber reinforcing material is attached or fused so as to improve the adhesion of the surface of the waterproof sheet to the material of the liquid waterproof material is used, or the surface of the sheet waterproof material is bonded to the liquid waterproof material. Use a waterproof sheet with a primer or coated with a material with good adhesion.

The waterproof structure according to the present invention includes the following aspects in the basic structure and construction method as described above, and these also belong to the scope of the present invention.
1. A method of laminating a synthetic fiber fiber reinforcing material sheet (nonwoven fabric) on a waterproof sheet.
2. A method of laminating a primer or coated sheet waterproofing material.
In this method, if a mode in which the material of the waterproof sheet is different from the compatibility of the room temperature curable sealant is selected and priority is given to the use of the room temperature curable sealant, the compatibility with the adhesive is required. Is a method using a waterproof sheet coated with a primer or a good material.
3. Examples thereof include a method of laminating (coating) a waterproof layer comprising a liquid curable coating waterproof material including the joint portion of the present invention.

The connection part joining structure of the present invention is obtained by construction as shown in the following example.
1. For example, as shown in FIG. 1, a rubberized asphalt sheet (2) having a width of 1 m and a length of 10 m, in which a surface of an asphalt base (1) is subjected to primer treatment, and a non-woven fabric is pasted on a commercially available upper surface thereof. The gaps (3) between the waterproof sheets were placed side by side with a gap of about 5 mm. A one-component urethane sealant (4) was injected and filled into the gap. Thereafter, a non-woven fabric (5) made of polyethylene fiber having a width of 50 mm was stuck thereon. Thereafter, a sufficient amount of one-component urethane sealing agent (4) was applied to cover the nonwoven fabric.
After curing, a two-component room temperature curable urethane coating waterproof material (6) was applied on the entire surface with a roller to form a waterproof layer (6), and the construction of the waterproof structure was completed.
After the work, the gap was observed and inspected, and there was no place where the bonding was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

2. Further, on the asphalt base (1), the rubberized asphalt sheet (2) having a non-woven fabric stuck on the upper surface was placed side by side with a gap of about 5 mm between the waterproof sheets.
Open this gap, apply room temperature curable sealing agent (4) to the open area, close the waterproof sheet to its original state after application, and put a commercially available polypropylene nonwoven fabric on the gap (3) (5) was pasted. A sufficient amount of a room-temperature curable sealing agent (4) was filled from above to fill the gap and cover the nonwoven fabric, and applied and cured.
After the work, the gap was observed and inspected, and there was no place where the bonding was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

3. Further, on the asphalt base (1), the rubberized asphalt sheet (2) having a nonwoven fabric stuck on the upper surface was placed side by side with a gap (3) between the waterproof sheets approximately 5 mm apart.
On this gap portion, a glass fiber cloth (5) having a width of about 100 mm in which a commercially available adhesive was spread over the gap was pasted. The cloth sticking operation was easily performed, and the waterproof sheet laid during the work period was stably fixed, and the sealing material injection and coating operations were extremely stable and smooth. A commercial cold-curing sealing agent (4) was injected and applied from above the cloth and cured.
After the work, the gap was observed and inspected, and there was no place where the bonding was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

4). Furthermore, as shown in FIG. 3, before installing a rubberized asphalt sheet (302) having a non-woven fabric pasted on a commercially available upper surface on an asphalt base (301), a gap (303 ) A double-sided adhesive sheet (312) having a width of about 100 mm was affixed to a location corresponding to (1). The rubberized asphalt sheet (302) was installed so that the center line of this sheet was in the gap of the waterproof sheet, and this was adhered to the base (301).
On the gap portion of the waterproof sheet, a glass fiber cloth (305) having a width of about 100 mm and a commercial adhesive spread so as to straddle the gap was pasted.
A commercial cold-curing sealing agent (304) was injected and applied from above the cloth (305) and cured.
In this construction, the room temperature curable sealing agent (304) formed a T-shaped waterproof layer, but when the gap was observed and inspected after the operation, there was no place where the bonding was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

5. As an example of waterproofing a base made up of a horizontal base and a vertical base, as shown in FIG. 4, on a horizontal base (402) on asphalt bases (401) and (411) having a parapet portion. The rubberized asphalt sheet (402) was installed as shown in FIG. 4, and the waterproof sheet (412) was installed on the vertical base (411) as shown in FIG. 4 to form a gap (403). A glass fiber cloth (405) having a width of about 100 mm, on which a commercially available adhesive was spread, was attached so as to sandwich the gap (403).
A commercial cold-curing sealing agent (404) was injected from above the cloth and cured. Finally, a two-component room temperature curable urethane coating waterproof material (406) was applied to laminate a waterproof layer.
This construction was good in workability, and when the gap was observed and inspected after the work, there was no place where the joining was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

6). As another example of waterproofing a similar horizontal base and vertical base, a commercially available rubberized asphalt sheet (502) is shown in FIG. 5 on a horizontal asphalt base (501) as shown in FIG. As shown, a commercially available room temperature curing type sealing agent (504) was injected into the gap (503) between the waterproof sheet and the vertical base (511). On top of that, a polypropylene cloth having a width of about 100 mm and an adhesive was spread. Further, a room temperature curable sealing agent (504) was applied and cured.
After curing, a two-component room temperature curing urethane coating waterproof material (506) was applied and a waterproof layer was laminated.
This construction was extremely simple and good in workability. After the work, the gap was observed and inspected, and there was no place where the joining was insufficient.
The results of wind resistance test, water tightness, etc. were not abnormal at all.

7). According to the construction of the conventional waterproof sheet, as shown in FIG. 6, it was installed so that the end of the waterproof sheet (602) overlapped on the base (601). This part was melted and joined together using a torch. The work was done with great care, but some parts were not connected properly.
This part could not be known during work. After the inspection, the insufficiently connected parts were melted again, but once the work was completed, it was necessary to work carefully to complete the connection, which took time and effort.

  8). In addition, according to the construction of the conventional waterproof sheet, as shown in FIG. 7, on the base including the horizontal base (701) and the vertical base (711), a plane whose section is a right triangle at a portion where the plane and the vertical plane intersect. A tree (707) was installed, and the waterproof sheets (702) and (712) on the horizontal base and the vertical base were installed so that the respective ends overlapped. This part was melted and joined by a torch. The work was done with great care, but some parts were not connected properly. This part could not be known during work. After the inspection, the insufficiently connected parts were melted again, but once the work was completed, it was necessary to work carefully to complete the connection, which took time and effort.

9. Furthermore, according to the construction of the conventional waterproof sheet, the waterproof sheet (802) is installed on the base (801) having a rising portion as shown in FIG.
The tip (803) of the waterproof sheet on the vertical surface is fixed by using a sealing material (804). In order to ensure the stability of the waterproof sheet on the vertical part, it is reinforced with a block (805). The block was hardened with mortar (806). This work required complicated work for waterproofing the vertical part.

In waterproof processing using a conventionally known waterproof sheet, the waterproof sheets are overlapped, and the overlapped portions are chemically bonded using a solvent or an adhesive, or are fused by heating with a torch or the like. Chemical or physical methods were taken. However, it has been difficult to obtain a satisfactory waterproof effect by these methods.
According to the present invention, the work can be performed with good reproducibility, and the workability is good because the sheets are arranged side by side so that the sheets that arrange the waterproof sheets on the board do not overlap. Can be bonded uniformly and firmly using a room temperature curable sealant, and the joint part is firmly bonded by a synergistic effect with the fiber reinforcement and the room temperature curable sealant. It is possible to obtain a waterproof structure showing an extremely excellent waterproof effect.

It is a figure which shows the waterproof structure containing the connection part junction structure concerning this invention. It is a figure which shows the cross section of the connection part junction structure concerning this invention. It is a figure which shows the waterproof structure containing the connection part junction structure using a double-sided adhesive tape. It is a figure which shows one example of the connection part junction structure of the base | substrate containing a vertical surface. It is a figure which shows the other example of the connection part junction structure of the base | substrate containing a vertical surface. It is a figure which shows the connection part junction structure by a lap joint construction method. It is a figure which shows the connection part junction structure of the base | substrate containing the vertical surface by a lap | linking method. It is a figure which shows the construction example of the waterproof structure by one example of the conventional construction method of the base | substrate containing a vertical surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Waterproof sheet 3 Gap between waterproof sheets 4 Room temperature curing sealant 5 Fibrous reinforcement 6 Coating waterproof layer 11 Primer layer 301 Base 312 Double-sided adhesive sheet 302 Waterproof sheet 303 Clearance between waterproof sheets 304 Room temperature curing sealing Agent 305 Fibrous reinforcing material 306 Coating waterproof layer 401 Horizontal base 411 Vertical base 402 Horizontal waterproof sheet 412 Vertical waterproof sheet 403 Clearance between waterproof sheets 404 Room temperature curable sealing agent 405 Fibrous reinforcing material 406 Coating film Waterproof layer 501 Horizontal substrate 511 Vertical substrate 502 Waterproof sheet 503 Clearance between waterproof sheet and vertical substrate 504 Room temperature curing sealant 505 Fibrous reinforcement 506 Waterproof layer 601 Base 602 Waterproof sheet 701 Horizontal base 711 Vertical Base 702 tarpaulin 03 foundation 811 vertical gap 707 surface tree 801 horizontal between tarpaulin base 802 tarpaulin 804 sealant 805 blocks 806 Mortar

Claims (10)

A waterproof sheet connecting portion joining structure comprising : A waterproof sheet installed on the base with a certain gap, B. A fibrous reinforcing material provided so as to cover the gap, and C. The inter-gap or該隙and fills the lower edge of the gap, and containing a waterproof layer formed by injecting curing a cold-setting sealing agent in an amount sufficient to hold to wrap the fibrous reinforcing material, the waterproof sheet and A waterproof sheet connecting portion joining structure, wherein a waterproof coating layer is applied to an upper surface of the room temperature curable sealing agent. The waterproof sheet connecting portion joining structure according to claim 1, wherein the waterproof sheet is a modified asphalt sheet, a synthetic rubber sheet, or a synthetic resin sheet. The joint structure for connecting a waterproof sheet according to claim 1, wherein the fibrous reinforcing material is a woven fabric, a nonwoven fabric or a cloth made of inorganic or organic fibers. The joint structure for connecting a waterproof sheet according to claim 1, wherein the fibrous reinforcing material is an inorganic or organic fiber reinforcing cloth to which an adhesive is attached. A waterproof sheet is installed on the base with a certain gap, and a room-temperature curable sealing agent is injected in an amount sufficient to fill the gap or the gap and the lower side edge of the gap. A room-temperature-curing sealant with an amount sufficient to cover the fibrous reinforcing material over the installed fibrous reinforcing material by installing the fibrous reinforcing material over the side edge of the waterproof sheet with a gap in between. A waterproof sheet connecting portion bonding structure characterized by applying and impregnating and curing, adhering and connecting the waterproof sheet, and further applying a waterproof coating layer on the upper surface of the waterproof sheet and the room temperature curable sealing agent Construction method. A waterproof sheet is installed on the base with a certain gap, and the side edge of the gap corresponding to the connecting part of the waterproof sheet is temporarily opened, and a room temperature curable sealing agent is applied to the open part on the base, Install the fibrous reinforcing material along the side edge of the waterproof sheet with the gap sandwiched between the waterproof sheet formed by returning the waterproof sheet to the original, and this installed fibrous form Fill the gap of the waterproof sheet from above the reinforcing material, and inject, apply or impregnate a sufficient amount of room temperature curable sealing agent to cover the fiber reinforcing material, cure it, and bond and connect the waterproof sheet. A method for constructing a joint structure for connecting a waterproof sheet, wherein a waterproof coating layer is applied to the upper surface of the room temperature curable sealing agent . Waterproof sheets, modified asphalt sheet, the construction method of the connecting portion joining structure of the waterproof sheet according to any one of claims 5-6 which is a synthetic rubber sheet or synthetic resin sheet. The method for constructing a joint structure for a waterproof sheet according to any one of claims 5 to 6 , wherein the fibrous reinforcing material is a woven or nonwoven fabric of glass fiber or a woven or nonwoven fabric of synthetic fiber. 7. The construction method for a joined structure of connecting portions of a waterproof sheet according to claim 5 , wherein the fibrous reinforcing material is an inorganic or organic fiber reinforcing cloth to which an adhesive is attached. A waterproof sheet installed on a base where surfaces having different angles are connected, with a gap at a line where each surface intersects, a fibrous reinforcing material provided so as to cover the gap, and the gap Or a waterproof layer filled with a sufficient amount of a room temperature curable sealing agent to fill the gap and the lower side edge of the gap and hold the fibrous reinforcing material so as to be wrapped is contained, and further on the upper surface of the waterproof layer A waterproof joint connecting structure , wherein a waterproof coating layer is applied .

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