JPH03115612A - Drain ditch construction method - Google Patents

Abstract

PURPOSE:To enable easy construction at a low cost by positioning a frame body for sheathing on floor at the predetermined spaces from wall, and placing fluidized mortar from the upper opening between two sheathing boards. CONSTITUTION:Sheathing boards 12, 13 of the same height are installed opposingly at the predetermined interval. These sheathing boards 12, 13 are firmly connected together by a support member 14 which has a communicating section 14a at the center in respective height directions and cross section is formed in H character quadrate. The size of the communicating section 14a is made in a size at which fluidized mortar is filled in the inside of a frame for sheathing. When drain ditch is made, fluidized mortar 15 is placed from an upper opening 11a at the predetermined interval from a wall 2, filled, and hardened. A drain ditch 16 is formed between a floor 4 and the wall 2 in close contact with the floor 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a drainage ditch construction method that can easily create drainage ditches necessary for underground structures.

[Conventional technology]

In recent years, as land prices in urban areas have soared, buildings have become taller and the number of basement floors has increased, increasing floor space.In addition, it has become common for private residences to have underground garages and basements.

As shown in Fig. 10, the basement is in direct contact with the soil 3 on the outside of the reinforced concrete walls (hereinafter referred to as walls) 2 that form the basement 1, so slight cracks may occur in the walls 2. If there is a defect in the mortar filling of concrete joints or main holes, water within ±3 will flow into the room through cracks, etc., and the amount will increase especially during rain.

Also, like the soil 3 on the outside, the wall 2 has approximately the same temperature throughout the year, so when the temperature inside the basement 1 rises, it contacts the wall 2 and falls below the dew point, causing the wall 2 to fall below the dew point. Dew condenses on the surface and flows down to the floor 4.

Conventionally, these waters are collected and treated by constructing a weir 5 along the wall 2 and forming a drainage ditch 6 on the floor 4 adjacent to the wall 2 to collect and treat the water that enters the basement 1.

In addition, an inner wall 7 is formed on the upper part of the weir 5 by a moisture permeable material such as a concrete block, so that the moisture passing through the inner wall 7 condenses on the wall 2 and does not condense on the surface of the inner wall 7. Efforts are also being made to improve livability.

[Problem to be Solved by the Invention] However, when creating the drainage ditch 6, as shown in Fig. 11, it is necessary to create the basement 1 in a small basement of a private residence or a sloping underground garage for storing a car. rear,
A shallow concave groove 6' is formed using a chisel and a hammer, and the weir 5 is made by attaching a formwork and pouring concrete, and an inner wall 7 is formed as required.

Furthermore, in building construction, as shown in Figure 12, when pouring the concrete floor 4, reinforcement is arranged in advance, and formwork is set on this reinforcement to form the ready-mixed concrete IJl.

After the concrete has hardened, the formwork is removed.
A weir 5 is formed, and an inner wall 7 is connected to the upper part of the weir 5.

Therefore, in any of the above cases, labor-intensive work such as pouring, installing, removing, and transporting formwork, concrete materials, and other materials must be carried out in adverse environments, such as chipping concrete in small basements, etc. It also required skilled workers.

In view of the above circumstances, it is an object of the present invention to provide a construction method that allows even an unskilled person to easily create a drainage ditch.

[Means to solve the problem]

In order to achieve the above object, the method for constructing a drainage ditch according to the present invention is a method for constructing a drainage ditch provided in a floor close to the inner circumferential surface of a wall forming an underground structure. The weir frame has two weir plates facing each other with a space between them, and the middle part of each in the height direction is connected and fixed to the wall by a support member having a communicating part that communicates the upper and lower parts. The mortar is placed on the floor at a predetermined distance from the above two weir plates, and fluidized mortar is poured from the upper openings of the two weir plates.

[Effect]

Since the present invention has the above-described configuration, by placing the weir frame at a predetermined position on the floor of a basement or the like, and pouring fluidized mortar from the upper opening, the mortar will cover the communication portion of the support member. The weir frame body filled with mortar is firmly fixed to the floor as the mortar hardens.

〔Example〕

Figures 1(a) and 1(b) show a weir frame 1 used in the present invention.
This shows an example of No. 1, in which reference numerals 12 and 13 in the figure indicate two weir plates of the same height that are provided facing each other at a predetermined interval. These weir plates 12 and 13 are firmly connected and fixed at their respective center portions in the height direction by a support member 14 having a communication portion 14a that communicates the upper and lower sides, and are formed into a substantially H-shape in cross section. The size of the communication portion 14a is such that the fluidized mortar poured from the upper opening 11a of the weir frame 11 passes through the communication portion 14a and fills the inside of the weir frame 11 in a short time. Size is necessary. In addition, the material must be easy to mold, capable of supporting the cast mortar, and resistant to alkali, and thermoplastic resin such as vinyl chloride is preferable.

Fluidized mortar is required to have good fluidity so that it can easily fill the void in a weir frame in a short time, and not cause material separation or shrinkage deformation, and is generally used for foundations of various plants, bridge shoes, steel tower filling, and railways. Those used for roadbeds, etc. are used.

As the above mortar, for example, cement: 769 kg/
m', water: 384 kg/m3 fly ash 8
5kg/m', sand: 854 kg/m3, high performance water reducer: 2.14 kg/m3, aluminum powder: 1
One example is one containing 28 g/m3.

2. The flow time through the P funnel, which is a measure of the fluidity of the fluidized mortar, is preferably around I 5 Sec.

The cement used is ordinary Portland cement.
Fly ash is a spherical fine powder generated at thermal power plants, and is effective in increasing fluidity and reducing breathing. The sand used is ordinary silica sand, and the high performance water reducing agent, which can be a commercially available product, contributes to the fluidity of the mortar. In addition, aluminum powder reacts with slaked coal produced in the aqueous phase reaction of cement and foams, which is effective in reducing shrinkage.

The rapid hardening fluidized mortar is one in which a known quick hardening agent is added to the above mortar composition, or one in which ultra-rapid hardening cement is used instead of ordinary Portland cement.

Furthermore, if a synthetic polymer emulsion is added to the fluidized mortar or rapidly hardening fluidized mortar, the adhesion to the floor will be improved.

To create a drainage ditch using the weir frame and fluidized mortar, the weir frame 11 is placed on the floor 4 at a predetermined distance from the wall 2, as shown in FIG. Then, fluidized mortar 15 is cast from the upper opening 11a. The fluidized mortar 15 is densely packed and hardened in the weir frame 11 in a short period of time, and is in close contact with the floor 4, creating a drainage groove 16 between the wall 2 and the weir frame 11.
is formed.

At this time, in order to improve the adhesion between the poured fluidized mortar 15 and the bed 4, the weir frame 11 is first placed as shown in FIGS. 3(a), (b), and (c). It is also possible to apply a thin layer of fluidized mortar 15 on the bed 4, place the weir frame 11 on top of this, and then pour the fluidized mortar 15 through the opening 11a to increase the adhesive strength with the bed 4. .

In addition, when carrying out construction, there may be cases where there is already water leakage on the floor 4, or the floor 4 is uneven, and the weir plate 1 of the weir frame 11
．． 2.1 If a gap is created between the lower edge of 13 and the surface of the floor 4 and the cast fluidized mortar flows out, it is difficult to fill the weir frame 11 with the fluidized mortar 15. , Figure 4 (
As shown in a), (b), and (c), 2.
Using the weir frame 11 with flexible packing 1.7.18 attached to the outside of the lower edge of 1.3, remove water from the floor surface 4 on which the weir frame 11 is placed, and then remove the water from the floor surface 4. Ni Patsukin 17,1
．． 8 to prevent water from entering the weir frame 11 or to prevent the placed fluidized mortar from flowing out, pour the fluidized mortar 15 through the upper opening 1.1.8. Set up

In this case, if the rapidly hardening fluidized mortar 15' is used, it will harden in a short time and the weir frame 11 will be fixed, making the construction easier. As the above-mentioned flexible packing material, a sponge made of synthetic resin or the like is suitable because it can be easily deformed with a small force and comes into close contact with the surface of the floor 4.

In addition, in the above explanation, the cross section of the weir frame 11 is
However, the present invention is not limited to this, and as shown in FIG. , as shown in Fig. 6, the lower part is expanded into a figure eight shape, and the fluidized mortar 15
The adhesion area between the floor 4 and the floor 4 may be increased.

The weir frame 11 can be easily made by extrusion molding and post-addition, in which a communicating portion is formed in the support member by punching, but the shape of the support member 14 is not limited to this. , for example, as shown in FIG.
The support member may have a shape in which the weir plates 12, 13 are connected by a rod 21.

Further, when the weir frame 11 is provided, a corner member 22 as shown in FIG. 8 may be made by injection molding and used. In addition, the connection may be made by spot welding the two together, or by using a simple connecting member 23 and joint material 24 made of cut extruded material, as shown in FIGS. 9(a) and 9(b). Good too.

〔Effect of the invention〕

As described above, the drainage ditch construction method according to the present invention includes:
Since the weir frame body is placed at a predetermined distance from the wall body and fluidized mortar is placed thereon, skilled manpower is not required. Furthermore, since the weir frame is set as a weir in a drainage ditch and remains there, less material is required to be carried out, the work is easy, and labor in harsh environments such as basements can be greatly reduced.

Furthermore, when forming the inner wall, it has many advantages such as being able to be connected to the upper surface of the weir frame filled with mortar.

[Brief explanation of drawings]

Figures 1(a) and 1(b) show an example of a weir frame used in the construction method of the present invention, and Figure 1<a> is a perspective view;
Figure 1 (b) is a view taken along the line I-1 in Figure 1 (a), Figure 2 is a view showing the weir frame fixed to the floor of the basement, and Figures 3 (a) and (b). ) (c) is a diagram showing the procedure for fixing the weir frame by pouring a thin layer of fluidized mortar on the floor, and Figures 4 (a), (b), and (c) are diagrams showing the procedure for fixing the weir frame by placing a thin layer of fluidized mortar on the floor. Figure 5 is a diagram showing the procedure for fixing the frame to the floor;
FIG. 6 is a view showing another example of the weir frame, FIG. 7 is a view corresponding to FIG. 1(b) showing another example of the support member, and FIG. Figure (b) equivalent diagram, Figure 9 (a)
(b) is a diagram showing a state in which the weir frame is connected by a connecting member and a joint material is attached, and FIG. 9 (a) is a perspective view;
Figure 9(b) is a cross-sectional view taken along the line IX-IX in Figure 9(a), Figure 10 is a vertical cross-sectional view of a portion of a typical basement, and Figure 1.1 is a cross-sectional view of a small basement, inclined garage, etc. Partial vertical cross-sectional view, FIG. 12 is a partial vertical cross-sectional view of a basement of a building or the like. 1... Ground) room, 2... Wall, 3...
...earth, 4...floor, 5...cough, 6...
...Drainage ditch, 6'...Groove, 7...Inner wall, 1
1... Frame for weir, lla..." double bottom part, 12.13... weir plate, 14...
・Supporting member, 14a...Communication part, 15...
... Fluidized mortar, 15'... Rapid hardening fluidized mortar, 16... Drainage ditch, 17.18...
... Flexible packing material, 21 ... Support member (rod), 22 ... Corner member, 23 ... Connection member, 24 ... Joint material.

Claims (5)

[Claims] (1) In a method of constructing a drainage ditch in the floor close to the inner peripheral surface of a wall that forms an underground structure, two long weir plates, each of a predetermined height, face each other with an interval. , positioning a weir frame on the floor at a predetermined distance from the wall, the middle part of each in the height direction being connected and fixed by a support member having a communication part that communicates with the top and bottom;
A method for constructing a drainage ditch, characterized by pouring fluidized mortar from the upper openings of the two weir plates. (2) A claim in which fluidized mortar or rapidly hardening fluidized mortar is cast using a weir frame in which a flexible packing material is attached to the outside of the lower edge of each weir plate as the weir frame ( 1) Construction method of the drainage ditch described. (3) The method for constructing a drainage ditch according to claim 1 or 2, wherein the weir frame uses a weir frame in which both weir plates have the same height. (4) The method for constructing a drainage ditch according to claim 1 or 2, wherein the weir frame uses a weir frame whose height of the weir plate on the wall side is lower than that of the other weir plate. (5) Claims (1) and (2), in which a thin layer of fluidized mortar is cast on the floor surface on which the weir frame is placed and its vicinity, and the weir frame is placed on top of the cast mortar. (3) or (4) construction method for a drainage ditch.