JP3211004B2 - Water guide plate and its construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a concrete structure, particularly an underground structure, which is hindered by opening of a joint due to drying shrinkage of concrete and leakage of water from the surrounding Janka. . Here, “Jyanka” refers to a skeleton having a gap between aggregates in a state where concrete cement and paste are flowed and only the aggregates are hardened.

(Prior art) a. Tunnel. When casting concrete continuously beside a shield, etc., in order to make a structure in the ground or in the space between the segmet and the formwork, the upper part between the existing concrete and the casting hole for the post-cast concrete There ’s no escape for the air,
Voids are easy to form.

b.In the case of the conventional water stop board, since the water stop board is installed at a right angle to the surface of the joint, the surrounding concrete flow is poor and it is difficult to fill sufficiently. It is difficult to apply a vibrator enough for fear.

c. As described above, the concrete is likely to be insufficiently filled around the joint portion for the above-mentioned reason (ab).

d. In the case of the water-swellable sealant, there is no countermeasure against Jyanka around the joint.

e. With the conventional water stop board, when concrete is poured every day, the next concrete will be poured in while the hardening strength is not sufficient, and the water stop board will be set when the formwork is set. Since it is installed in the middle of the winding thickness, the winding thickness of the water stop plate portion is divided into two, and cracks are easily induced.

(Problems to be solved by the invention) A. Filling of concrete in the upper cavity (15) in the formwork between the casting hole (16) and the existing concrete (2).

B. Because the conventional water stoppage plate is flat, the obstruction of concrete flow that occurs when the water stoppage plate is installed is eliminated.

C. Countermeasures for joints and surrounding Jyanka.

D. Since the water stop plate is installed at the middle point of the winding thickness at right angles to the surface of the joint, the winding thickness is divided into two at the place where the water stop plate is inserted, and it is easy to induce cracks.

E. Measures against water leakage caused by opening of the joint due to drying shrinkage.

(Means for Solving the Problems) In order to achieve this object, the present invention has the following configuration, that is, the water guide plate (1) according to the present invention is a joint of existing concrete. This is a strip-shaped water guide plate to be installed in the building. The shape is a resin plate coated with adhesive elastic resin. It has a semicircular cross section (4) to improve the flow of concrete and is molded with a resin plate inside. It is composed of a circular hollow space gutter (6) and a joining water guide section (7), and the end of the joining water guide section (7) is provided with an opening (8) at the contact point between the flat section (4-1) and the semicircular section (4-2). Water guide plate with a). As shown in Fig. 4, the water guide plate (1) according to the present invention is connected to the surface of the existing concrete joint (9), and the water transfer guide (7) is directed outward (ground, segment side). At (10.12), the adhesive surface (4-
1) Install by crimping, and install the pipe (11) through the joining device (10) to the top of the formwork. Insert the pipe (13) until it reaches the space gutter (6) in the joining device (12). Do
The installation of the water guide plate is completed as described above, and the countermeasure for the problem (ab), which is a disadvantage of the conventional water stop plate, is completed for the time being. Next, the construction method of the most important part of the present invention will be described. The water guide plate has an opening (8) which is closed when concrete is poured to prevent concrete from flowing in. At the time when the concrete dries and shrinks, the joint is opened and water leakage starts, the adhesive elastic resin plate (4) is opened. ) Is a flat part (4-) to improve the adhesion between the existing concrete (2) and the post-cast concrete (3).
1) and the semi-circular part (4-2) to improve the fluidity of concrete, so it is pulled by the concrete (2.3) on both sides as the concrete dries, and the joint water guide (7) opens and strikes An object of the present invention is to provide a water guide plate and a construction method which can facilitate injection of cement and milk as a main purpose by being connected to the joint (9), thereby preventing water leakage.

(Effect) When the concrete is near the end of casting, the concrete will be clogged up to the upper part, but there will be no air escape path in the upper gap (15) between the existing concrete and the post-cast concrete, and the air will be compressed and the air gap will be reduced. Eliminates voids by evacuating air from the pipe (11), which is easily retained by a joining device (10). The water guide plate according to the present invention prevents the inflow of concrete because the opening (8) is closed at the time of concrete casting, and the adhesive resin plate (4) at the time when the concrete dries and shrinks and the joint is opened.
Is bonded to the existing concrete (2) and the after-cast concrete (3) at the plane part (4-1) and the semicircular part (4-2). The part (7) is opened and connected to the joint part (9). At this point, the injection agent is supplied from the pipe (13) held by the joining device (12) and air is supplied from the pipe (11) held by the joining device (10). The injection is performed until the injection flows out from the pipe (11). The injection fills the space of the space gutter (6), the joint water supply section (7), and the connection section (9) from the pipe (13). While reaching the upper end of the pipe (11), it fills all the voids such as the space of the junction (9) of the Jyanka (18) and makes a solid concrete.

Example 1. Fig. 5 In the case of underground structure by shield method, etc., in the secondary lining, formwork (17) is set inside segment surrounded by segment, and space between segment (14) and formwork (17) After the concrete (3) is cast from the casting hole (16), the post-cast concrete (3) is cast and the concrete (3) in the formwork
When is filled from the bottom to the top, the top of the casting hole (16) rises to the formwork due to the slump, at which point the concrete (3) outside the casting hole (16) is connected to the filling plate Air is exhausted from gaps in parts, etc., but casting holes (16)
The air on the side of the existing concrete (2) is surrounded by the post-cast concrete (3), the segment (14) and the existing concrete (2), which are press-fitted, so that there is no escape route and a gap is easily formed. 4) Before setting the formwork as shown in Fig. 4, install the joint water transfer section (7) to the segment (14) side at the joint of existing concrete (2) and discharge air from the pipe (11). By doing so, the filling of the post-cast concrete (3) is measured, and the gap (15) is removed to secure the winding thickness.

2. Fig. 4 At the point when the concrete has hardened and the joint (9) has opened and water has begun to leak, the injection agent is injected into the pipe (13) while discharging air from the pipe (11). The concrete (2) (3) on both sides is stretched by the gutter (6) and the drying shrinkage to fill the spliced joint (9) that has been opened and reaches the upper end of the pipe (11). The pipe (11) after confirming that all voids have been filled in the space gutter (6), the joint water conveyance section (7), the joint section (9), and the diyanka (18) due to the start of the flow of the injection material. By plugging the lower end of the pipe and continuing the pouring, pouring can be expected to the deep part of the water channel created by the opening of the joint, and a solid and firm body can be formed to prevent water leakage. Here, as an injection,
It is preferable to use ultrafine cement and milk.

3. If water leakage from tunnels such as tunnels can be expected to be more effective than stopping water, use the water guide plate (1) installed using the same installation method and concrete (2.
3) Drying shrinkage and leakage due to the opening of the joint (9) are received and received by the joint water conduit (7) space gutter (6) and drained into a water collecting pipe or drainage drain installed in the roadbed. To prevent water leaks from coming out.

Advantages of the Invention 1. As described in Example 1, as a first step, by removing the voids of the post-cast concrete, it is possible to secure the winding thickness and to produce a solid concrete.

2. As described in Example 2, as a second step, in order to further increase the water stopping effect of the water guide plate itself due to the elastic resin, the joint that opened after the concrete dried and shrunk and the surrounding joints By injecting an injectable material into a solid body,
When the joint is opened and a water channel is formed, the air vent pipe (11) is plugged and the injection pressure from the pipe (13) is increased. It is possible to enhance the water stopping effect.

3. Figure 6. In the case of a tunnel, etc., a water guide plate is installed at each joint using a joining device, and water leakage is collected into a space gutter through the joint water guide and led to a water collection pipe or drainage ditch installed on the road. It is expected to prevent water leakage in the tunnel, prevent the formation of icicles in winter, and prevent accidents caused by falling icicles.

[Brief description of the drawings]

1 shows the structure of the present invention, FIGS. 2 to 6 show an embodiment of the present invention, and FIG. 1 is a perspective view of the structure. Fig. 2 is a sectional view of the installed state. Fig. 3 is a cross-sectional view of concrete when it shrinks. 4th
The figure is a side view. FIG. 5 is a longitudinal sectional view of FIG. FIG. 6 is a perspective view of an embodiment of the water conduction method. DESCRIPTION OF SYMBOLS 1 ... Water guide plate 2 ... Existing concrete 3 ... Post-cast concrete 4 ... Adhesive elastic resin 4-1 ... Adhesive elastic resin flat part, 4-2 ... Adhesive elastic resin Circular part,
5 ... resin plate, 6 ... space gutter, 7 ... joining water guide section, 8 ...
... water-guiding opening, 9 ... joint, 10 ... joining equipment, 11 ...
… Pipe, 12 …… Connecting device, 13 …… Pipe, 14 …… Segment, 15 …… Void, 16 …… Punch hole, 17 …… Form, 18…
… Jyanka, 19 …… Catcher

Claims (3)

(57) [Claims] 1. A band-shaped water guide plate having a semicircular cross section in which a resin plate (5) is coated with an adhesive elastic resin (4), wherein the resin plate (5) is a hollow circular space trough (6). ) And the space gutter (6)
The water guide plate is characterized by comprising a joined water guide section (7) connected to the adhesive member, and the adhesive elastic resin (4) consisting of a plane section (4-1) and a semicircular section (4-2). 2. A resin plate (5) comprising a hollow circular space gutter (6) and a joined water guide section (7) connected to the space gutter (6) is flattened. (4-
A belt-shaped water guide plate having a semicircular cross section covered with an adhesive elastic resin (4) consisting of a semicircular portion (4-2) and a semicircular portion (4-2) is installed on the existing concrete (2), and the post-cast concrete (3) is provided. At the time of casting, the air in the formwork (15) is evacuated from the installation pipe (11), and the concrete dries and shrinks.
When the joint (9) opens, the pipe (1
3) A water stoppage method using a water guide plate, characterized by injecting an injectant such as cement milk and filling the gap between the casting part (9) and the surrounding junkers (18) with the injectant. 3. A water guiding method for a water guide plate (1) A resin plate (5) comprising a hollow circular space gutter (6) and a joined water guide portion (7) connected to the space gutter (6) is flattened. 4-
A band-shaped water guide plate having a semicircular cross section covered with an adhesive elastic resin (4) consisting of a semicircular portion (4-2) and a semicircular portion (4-2) is installed on the existing concrete (2), and the post-cast concrete (3) is provided. At the time of casting, the air in the formwork (15) is evacuated from the upper installation pipe (11), and the concrete dries and shrinks.
When the casting part (9) is opened and water leakage starts, water leakage is received at the joint water conveyance part (7), and the water is flowed to the lower part (19) through the space gutter (6) to prevent water leakage. Water conduction method.