JPS59213822A - Joint treatment of underground surrounding wall in inverted placement work - Google Patents

Abstract

PURPOSE:To raise the water-sealing property of concrete joints by a method in which an L-shaped water shield plate consisting of the first plate and the second plate is fixed to the upside of a bottom formwork, and after concrete placed is hardened, the second plate is extended. CONSTITUTION:A bottom formwork 1 is set in contact with a sheathing wall A, and an L-shaped water shield plate 4 consisting of the first plate 4a and the second plate 4b is fixed with nails to the upside of the bottom formwork 1. Concrete is placed into the space in the bottom formwork 1, an inside formwork 6, and the sheathing wall A and hardened, and the bottom formwork 1 and the inside formwork 6 are removed out. The second plate 4b is extended downwards, a formwork 7 made of a soluble material for forming an injection hole is attached, and concrete is placed into the inside formwork 8. After the concrete hardenes, the formwork 7 is removed by dissolution to form an injection hole, and a solidifying grout, e.g., a cement-based paste, etc., is injected through the injection hole into the concrete joint portion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating joints in an underground outer peripheral wall using a reverse casting method.

-In the case of the underground outer wall using the reverse construction method 1,
[Part 1] If a gap 1haj711) is formed in the concrete pouring area due to rising water in the concrete, even if it is a small one of 6 degrees, which is not a weak point in the structure, it can cause water leakage. However, in areas where the groundwater level is high, water leakage can reach levels as high as 1. For this reason, an inner wall was constructed by building blocks on the inside of the underground outer peripheral wall, and both walls 1fj
4. The so-called double wall method of forming LC drainage channels is often adopted. On the other hand, this construction method not only causes a significant increase in cost, but also reduces the effective floor area of the basement floor to i'j1. l
D male and talented! From having to pay a funeral,
There is a strong desire to establish an alternative technology.

By the way, the present inventors have previously created injection holes using a soluble material on the bottom surface of concrete. ! Place frame 4
Concrete was installed in an old manner, ? 4FJ After the concrete has hardened, the formwork is removed, an injection hole is created, and an injection material such as cement paste or resin is injected into the concrete pouring area through the injection hole. Developed a method for processing the paper section and published it in 1984
It has already been proposed as 9075@ gazette. This method is similar to the traditional injection method in which the injection pipe, etc. is buried (there is no risk of clogging of the injection hole with post-poured concrete, and therefore the injection agent is poured to the desired depth of the joint). It is a reliable and reliable method that can be spread throughout the area in one go.

The present invention further improves and develops the method for treating the 41F section, which has the above-mentioned advantages, and makes it possible to obtain good water-stopping properties at the reversed section even in areas with high groundwater levels. The purpose of this project is to eliminate the need for the double G construction method, and a water stop plate made of the cross-section method consisting of the first plate part and the second plate part, which are bent at different angles, is used for the upper underground outer peripheral wall. Concrete is poured on one side of the moon block using a bolt attached to the top of the bottom form, with the first plate standing upright and the second plate in contact with the top of the bottom form. After removing the bottom 411 frame, the second plate part of the appendix water stop plate is stretched downward, and a soluble waste material is applied to the bottom surface of the upper side ground and the lower outer peripheral wall. With 42 frames for making injection holes,
Lower i1i basement outside),! , Post-cast the concrete for the J wall, and after the post-cast concrete hardens, 11
Remove the bath Fi'+1 from the formwork marked J to create an injection hole, and apply cement paste,
It is characterized by injecting a hardening agent such as resin.

Hereinafter, a practical example of the present invention will be translated and explained based on Figure 1.

Underground outer circumference! 1. When constructing Y by l'i4 m using the reverse construction method, first, in contact with the retaining wall A, the bottom J for the northern underground outer peripheral wall (→! Frame 1 is tilted l' so that it is higher towards the inside). or after I7 hill formwork 1)
First, place Kabebo 2.3 vertically and horizontally.

On the upper surface of the bottom formwork 1, a first plate part 4σ and a second plate part 4b, which are bent at an appropriate angle to each other, are provided in advance or after the setting is completed.
l: I) 7x cross section 1'lt + L-shaped water stop plate 4,
Place the first plate part 4a in an upright position, and place the plate part 4b in contact with the upper surface of the turf formwork 1, using double-sided adhesive tape or a second
It is fixed by a grout 5 or the like that passes through the plate portion 4b. The water stop plate 4 is made of a metal plate such as an iron plate, or a metal plate as a core material, and the surrounding area is made of non-vulcanized recycled butyl rubber that has the property of adhering to concrete as the concrete hardens. things are used. Tape a is tied across the upper surface of the second plate portion 4b and seven sides of the bottom formwork 1. This serves to prevent the second plate part 4b from sticking to the concrete 5u, and also to prevent the second plate part 4b from being embedded in the concrete due to the concrete being pushed under the second plate part 4b. In addition, the water stop plate 4 is arranged over the entire length of the bottom formwork 1, and when a plurality of water stop plates 4 are arranged by adding A1γ in the longitudinal direction, It is preferable to screw the ends together as shown in FIG.

Next, the inner formwork 6 is set, concrete is poured into the space above the bottom formwork 1, and after the concrete has hardened, the bottom formwork 1 and the inner formwork 6 are dismantled and removed. (
As shown, the northern underground outer peripheral wall B is fabricated.

After that, as shown by the imaginary line in FIG.
, %r B (7) Protrude from the bottom surface. At this point, tape φ1] is set aside. Next, a plurality of injection hole making molds J'i' 7, made of a soluble material such as expanded polystyrene, which is soaked in a solvent such as thinner, are placed in the upper part (1111 of the basement outer wall B). 1 m1, one end is in contact with the second plate capital 4b of the water stop plate 4, and the other end is in contact with the northern underground outer peripheral wall B
Attach it at appropriate intervals on the exposed side of the 1IIi side. This attachment may be done using Jim adhesive, or may use double-sided adhesive tape, concrete gluing, or the like.

After that, the lower part o+1:+1:1 underground formwork (not shown) is set, the water stop plate (1me not shown) is fixed to the bottom form, etc., and the lower part underground part 1 is set. ．． Iga Jk
(Set the inner 11111 formwork 8, and pour concrete through the pouring part 8a provided on the upper edge of the inner formwork 8.
] Chisuru.

After the post-cast concrete has hardened, the inner 4-1 frame 8 and the bottom formwork (not shown) are dismantled and removed to create the lower underground outer peripheral wall C as shown in FIG.

When the above steps are completed, or after the above steps are repeated, when the underground outer peripheral wall up to the predetermined underground floor is constructed, as shown in FIG. The concrete casting jaw b is removed using a nine-hole cutter, and the mold 7 for making the injection hole is dissolved and removed using a solvent such as thinner. A vacuum pump is used to discharge the solution.

After creating the injection hole 9 in the predetermined pouring joint in this way, paste from the injection hole 9 into the concrete batting area is filled with cement-based non-shrinkable admixture-containing paste (for example, Tuscombeneto) or resin cutting. Inject the solidifying injection agent 1j10 at an appropriate pressure (un'ql~10''hΔ).This injection operation should be done to prevent the injection agent from leaking out from near the opening end of the injection hole 9 due to a short circuit. It is desirable to seal the joint near the opening end.

According to the method described in 1, since the injection hole 9 is prepared after the part-side underground outer peripheral wall C has hardened in 1, there is no clogging of the injection hole 9, and the injection agent 10 is poured into the concrete pouring 4 (in the deep part of the part 1). can be reliably and sufficiently distributed.

In addition, the first N@1s4a of the waterstop plate 4 is embedded in the upper 11■1 underground outer peripheral wall B, and the second plate part 4b or the lower underground outer circumference Bgc is embedded 9, and the intervening part of the waterstop plate 4 is Even if a cavity is formed on the back of the water stop plate C due to the installation, the injection agent 10
Because it is press-fitted, extremely high water-stopping properties can be obtained.

In addition, after repairing the opening end of the injection hole 9, the waterproof mortar /I/
Although it is desirable to finish the wall surface in step 11, these steps can be omitted and are not essential to the present invention.

FIG. 7 shows another embodiment. In this embodiment, holes C or notches d as shown in FIG. After forming the upper underground peripheral wall in the same way as in the previous firearm example and stretching the second plate part 4b downward, some of the molds 7 for making injection holes (for example, 7 The formwork for A12 injection molding located every other book) is
It is characterized in that one end thereof is placed in the code which is inserted into the hole C or notch d. According to this embodiment, the water stop plate 4
Since the injection hole is formed on the back side of the OiJ
The injection agent can be more reliably spread to the back side of the IF water plate 4.

As explained above, according to the method of the present invention, the first plate part of the water stop plate is embedded in the northern side underground outer circumferential wall, and the second plate part is embedded in the lower side underground outer circumferential wall, respectively. In addition, since the injection hole is formed after the lower underground peripheral wall is fabricated, the injection process is reliable, and even if a cavity is formed on the back surface of the water stop plate, this part will be filled with the injection agent. Become.

Therefore, the water-tightness of the hanging part is extremely high, and the double layer makes it unnecessary to use the Y construction method, making it possible to significantly reduce costs and expand the effective floor area of the basement floor.

[Brief explanation of the drawing]

The drawings show an example of the firearm of the present invention, and Figures 1 to 6 show 11 methods of making an underground peripheral wall, and Figure 7 shows another example. It! The clear drawing and FIG. 8 are partially cutaway perspective views of the water stop 4fj used in the embodiment shown in FIG. 7. Underground outer prefecture, C... 10 songs ≦ f11 + i (U-cho outer station iris 1"
So, 1...1 parent! W frame, 4... Water stop plate,
4a...first (opposite part), 4b...second plate part, 7...
・Formwork for making injection holes, ? ...Injection hole, 1°...
・Injection agent. Carving 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] Bent each other'd; 1st board and 2nd board The first board is upright and the second board is in contact with the top surface of the bottom formwork.Concrete is poured above the bottom formwork and the top side is placed outside the basement. f
After forming the bottom form and removing the bottom formwork, the second part of the water stop plate is removed.
In addition to stretching the board downward, he made the mistake of installing a formwork for making injection holes made of soluble material Nei1 on the upper part of the underground outer peripheral wall, and folded the concrete for the lower part of the underground outer peripheral wall. After pouring concrete, remove the 6iJ formwork using a bathing agent to create an injection hole, and insert the 7-ment thread base 1~, ta from the injection hole into the concrete placement part.
Excavation of the underground outer peripheral wall by the reverse-excavation method, which is characterized by injecting a hardening agent such as r1 fat, β:, tYb treatment ±11
1 force method.