JP3108606B2 - Segment, segment formwork, and method of draining segment formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment formwork used for an underground tank or the like, a segment, and a method of draining the segment formwork.

[0002]

2. Description of the Related Art Conventionally, large frames constructed of metal foam have been used in large structures and the like. Recently, however, many segment molds have been adopted in order to perform safe and high-quality rational construction. It has become When such a segment formwork is used for an underground structure, water is leaked from cracks in the skeleton concrete because the structure is installed below the groundwater level. For this reason, as shown in FIG. 6 and FIG.

In FIG. 6, reference numeral 101 denotes a skeleton, reference numeral 103 denotes a segment, and reference numeral 105 denotes a segment joint portion. A water stop sheet 107 is attached to the side of the skeleton 101 of the segment 103. Each segment 103 is connected by a bolt (not shown) or the like at a segment joint 105. In FIG. 7, 201 is a skeleton, 203 is a segment, 20
Reference numeral 5 denotes a segment joint, and a segment joint 205
A seal 207 is provided on the side of the frame 201.

[0004]

However, the methods shown in FIGS. 6 and 7 cannot cope with the case where the water pressure is high and the amount of water leakage is large. Further, since the water blocking sheet 107 and the seal 207 are attached after the segments 103 and 203 are assembled, the cost is increased and there is a problem in safety. The present invention has been made in view of such a problem, and an object of the present invention is to solve a case where a large amount of water leaks, to provide a low cost and high safety segment formwork, a segment and a segment formwork. The purpose of the present invention is to provide a drainage method.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a first invention is to provide a drainage section on one surface of a segment used for an underground tank or the like so as to extend in a vertical direction with the segment standing. A vertical pipe provided, and an oblique pipe provided obliquely downward from the drainage section toward the vertical pipe in a state where the segment is set up. A second invention is a segment formwork characterized in that a plurality of the above-described segments are provided in a horizontal direction and a vertical direction, and in the segments provided in a vertical direction, the vertical pipes are connected to each other by joints. .

A third invention is a method of draining a segment mold according to the above-described segment form, wherein drainage is performed from the drainage section through the oblique pipe and the vertical pipe. On one side of a segment used as a formwork, a drainage section, and a vertical pipe and an oblique pipe for drainage are attached to the segment at a stage of being manufactured in a factory. At the site, while consolidating segments,
The vertical pipes of each segment are connected by joints to construct a segment formwork. In this segment formwork, drainage is performed by a drainage part, an oblique pipe, and a vertical pipe.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a segment mold. In FIG. 1, reference numeral 1 denotes a ground surface, 3 denotes a groundwater table, and 5 denotes frame concrete such as a side wall of an underground tank. The segment formwork 7 is used when the concrete 5 is cast. The segment form 7 is formed by connecting a plurality of segments 9 with bolts (not shown) or the like.

FIG. 2 is a plan view when the segment form 7 is viewed from the skeleton concrete 5 side, FIG. 3 is a longitudinal sectional view along BB in FIG. 2, and FIG. 4 is a transverse sectional view along CC in FIG. , FIG.
5 is an enlarged view of a portion A in FIG. As shown in FIG. 5, a drain portion 10 is provided on the surface of the segment 9 which is in contact with the skeleton concrete 5.
Is provided, and a permeable mat 13 is provided in the drainage section 10,
The diagonal pipe 1 as a connecting pipe is
5 is provided. The nonwoven fabric 11 is provided on the front surface of the water-permeable mat 13.

As shown in FIG. 2, two permeable mats 13 are provided for each segment 9,
Are provided for each segment 9. The segment 9 is provided with a vertical pipe 17 as a main pipe,
Two oblique pipes 15 are connected to this vertical pipe 17. Each of the segments 9 includes a nonwoven fabric 11, a water-permeable mat 13, an oblique pipe 15, and a vertical pipe 17 at a stage of being manufactured in a factory.
Is provided.

Next, the segments 9 are connected at the site to construct the segment formwork 7 as shown in FIG. In this case, as shown in FIG. 3, each segment 9 is connected at the segment joint 21 by a bolt or the like (not shown). At this time, the vertical pipes 17 of the respective segments 9 are connected by the vertical pipe joints 19 in the concave portions 20 . Then, the skeleton concrete 5 is cast. Thereafter, when water leakage occurs due to cracks or the like in the skeleton concrete 5, the water leakage is drained through the water-permeable mat 13, the oblique pipe 15, and the vertical pipe 17, and collected at the bottom.

As described above, the oblique pipe 15, the vertical pipe 1
Since the drainage equipment such as 7 is installed in the factory when the segment 9 is manufactured, the work on site only needs to be the joining of the vertical pipes 17, and the work is easy, and cost reduction and safety can be improved.

In the above-mentioned segment form 7, 1
Although two permeable mats 13 are provided for one segment 9, the number of permeable mats 13 is not limited to two, and the number of permeable mats 13 may be adjusted as necessary. . In this way, it is possible to reliably drain the water with almost no water pressure applied to the back surface of the segment 9. Further, the numbers of the vertical pipes 17 and the oblique pipes 15 are not limited to those described in the present embodiment.

[0013]

As described above in detail, according to the present invention, it is possible to cope with the case where the amount of water leakage is large, to provide a low-cost, high-safety segment formwork, a segment and a drainage method using the segment formwork. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a segment formwork 7;

FIG. 2 is a plan view of the segment formwork 7 viewed from the skeleton concrete 5 side.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a sectional view taken along the line CC of FIG. 2;

FIG. 5 is an enlarged view of a portion A in FIG. 4;

FIG. 6 is an explanatory diagram of water stoppage of a conventional segment formwork.

FIG. 7 is an explanatory view of water stoppage of a conventional segment formwork.

[Explanation of symbols]

 7 Segment mold 9 Segment 11 Non-woven fabric 13 Water-permeable mat 15 Diagonal pipe 17 Vertical pipe 19 Vertical pipe joint

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E21D 11/10 E21D 11/04 E21D 5/00-5/01

Claims (6)

(57) [Claims] 1. A segment used for an underground tank or the like.
On one surface, a drainage section, a vertical pipe provided to extend in the vertical direction with the segment standing, and an obliquely provided diagonally downward from the drainage section toward the vertical pipe with the segment standing upright. segments, characterized by providing the pipe, a. 2. The segment according to claim 1, wherein a permeable mat and a nonwoven fabric are provided in the drain section. 3. The segment according to claim 1, wherein the segment near the end of the vertical pipe is provided with a concave portion. 4. A segment formwork wherein a plurality of segments according to claim 1 are provided in a horizontal direction and a vertical direction, and in the segments provided in a vertical direction, the vertical pipes are connected to each other by joints. 5. The segment type according to claim 3, wherein a plurality of the segments according to claim 3 are provided in a horizontal direction and a vertical direction, and in the segments provided in the vertical direction, the vertical pipes are connected to each other by joints in the concave portions. frame. 6. The drainage method for a segment formwork according to claim 4, wherein drainage is performed from the drainage section through the oblique pipe and the vertical pipe.