JPS58138823A - Lateral compaction for underground continuous wall - Google Patents

Abstract

PURPOSE:To simplify the construction work of an underground continuous wall by a method in which horizontal holes are drilled in projections formed on one sides of concrete unit walls, tension members are inserted and set, and concrete is placed. CONSTITUTION:Vertical projections 2a are formed on one side of a concrete unit wall 2 to make up a continuous wall, and plural horizontal holes 2b are drilled in almost horizontal direction on a straight line. Then, tension members 4 of PC wires, etc., are pierced through sheathes 3 passing through the holes 2 of plural walls 2, one ends of the tension members are fixed by a fixing means 5 and the other ends are attached to a tension means 6, and the port of the means 6 is removed and concrete is placed. Then, after the concrete has hardened, a tension is given to the tension member 4 by the means 6 in such a way as to give a lateral compaction force to the continuous wall.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horizontal tightening method for an underground continuous wall formed by continuously pouring a plurality of concrete unit walls into the ground or by connecting them in a column. be.

- Generally, this kind of underground continuous wall is used as 1-retaining wall, 11-ice wall, or as part of underground structure wood, or it is made of multiple concrete layers underground. An underground continuous wall formed by continuously splicing 11x structures has a weak strength at the spliced parts, for example, 4. N. (:) Despite requiring huge costs, such as underground tanks, they were seen as nothing more than separate upright walls, and improvements were requested.

Conventionally, methods for reinforcing the joints of concrete unit walls have included cutting reinforcing bars or water roots at the joints, which are complicated and time-consuming. Although it is expensive, the entire continuous wall, including the joint 1 part, is not limited to partial reinforcement. It is not yet possible to use it as a section, and there have also been some developments in which tensioning holes are inserted into the wall to apply prestress to the entire continuous wall. There were problems such as the need for advanced technology.

The present invention has been made in view of the above points, and its 3rd purpose is to
A protrusion is formed at 1111, and a tension material is inserted into the horizontal hole drilled (2) and a new tension member is placed on the side of the wall. By applying a tightening force in the direction of the lateral force, the structure can be used as a part of the main body of the structure that can withstand water pressure, and the construction is simple and quick +1. j) To provide a method for laterally tightening an underground continuous wall that can be constructed with ease.Embodiments of the present invention will now be described with reference to the drawings. Figure 1 shows a hard trench hole drilled into the ground with a clamshell bucket or bit, etc. , shows the state in the middle of forming a continuous wall \\ by continuously splicing one wall lumber 2 of size ii, and the - side of the concrete wall 2 of size 1.11''L has the necessary parts. A single protrusion 2a having the required depth and vertical direction is integrally provided.The protrusion 2a is formed at one end of the concrete unit wall 2 (as illustrated in FIG. 6). L, type) or both ends (type)
They may be formed, and the position and number may be selected as necessary. In addition, the continuous wall Δ is not limited to the case where it is formed in a straight line =4= shape as shown in the figure, for example, 1. , ,N,(
1.Circular shape +A like when building a ground tank etc.
tf is also fine1. In addition, in this example, 5.Cree.1.j)
l, l, '7 wall problem 2 is formed by placing reinforcing bars as appropriate in one part of the hard l1li, fL l, or by pouring concrete without reinforcing bars, so F .

However, the concrete 1 wall wood unit 1 was formed in advance in a field 21, etc., and then the concrete 11i wall wood unit 2 was inserted into the groove hole 1 and connected in a vertical line.
good.

Next, excavate one side of the continuous wall A constructed as described in 1-1 below, that is, the wall surface side -1- where the protrusion 2a is formed,
As shown in FIG. 2, a plurality of horizontal holes 21) are drilled in the projection 2a using a drill or the like. When pouring the horizontal hole 21], a sheath or the like may be pre-formed on the reinforcing bar at the time of pouring the concrete as described in 1-1.
1. It is a good idea to have already drilled the holes in wall wood unit 1. The horizontal holes 21] are arranged approximately horizontally to each other in the -11 (line 1, and then the horizontal holes 21 arranged as shown in 1) are shown in Figure 1. Insert the sheath 3 as shown. The sheath:) 5- is a plurality of concrete sheets) ・1) is inserted into the horizontal hole 21 of the samurai wall wood 2
] are inserted into the sea urchins through the stakes, and each sheath 3 is placed one by one in sequence as shown in the figure. It is good that the force is averaged over the entire continuous wall A and is 1<j:Uni゛・)-. Then, put a PC wire or 1) tension of a steel rod etc. into the sheath: 3
is passed through, and its both ends protrude from the end surface of the horizontal hole 2+1 of the protrusion 2a. One end of the tension material 4 is fixed with a fixing device 5 such as fixing hardware, and it! ``Tension means such as jacks should be attached to the ends.

Next, appropriate formwork (not shown) is constructed on the side where the continuous wall is excavated and on the side of the wall where the IJI+% tension material 1 is placed, and concrete 7 is poured. In addition, the said Funkri-1.7-4']
At the time of installation, leave the tension means G part unboxed.
When the concrete 7 hardens, tension is applied to the tensioning means 6 by applying tension L + A4, and the inside of the sheath 3 is grouted to apply lateral tightening force to the -1- continuous wall l\.
Rieru.

In the embodiment described in -1-, after the concrete 7 was poured and hardened, the tensioning force 11 in the sheath was tightened to increase the tightening force on the continuous wall A (as shown in Fig. 5). Figure 1.1: Insert the tension member 4 directly into the sea urchin horizontal hole 21 and tension the tension member 4 with the tension means 6 attached to the end, as shown in Fig. 4. After the concrete 7 is poured and the concrete 1 and 7 harden and reach a predetermined strength, the tensioning means 6 described in - is released, and the concrete 7 is prestressed 11 - as described in - to form a continuous wall. J to give horizontal tightening force to A:
You can do it as well.

The present invention is as follows: 1':J, 1- (this, concrete 1'
A protrusion was formed on one side of the L-position wall, and a horizontal hole was drilled in the protrusion so that the tension member 4 could be inserted through the protrusion, so it was easy to arrange the tension material, take care of the tension means, and avoid any injuries. Not only can this be done extremely easily and quickly, it can also support the tension member stably and strongly, and the number and position of the protrusions as well as the length can be freely selected depending on the purpose. By pouring new concrete on the wall surface on the side where the tendons are placed and applying lateral tightening force to the continuous wall and integrating it, for example, soil, N, G, underground Like a tank, the underground continuous wall can be used as a part of the structure,
Overall, the process is simple, quick, and inexpensive.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the formation of a concrete unit wall in a trench hole drilled underground, and Figure 2 is a perspective view of the protrusion (
FIG. 3 is a perspective view of the embodiment of the present invention showing a state in which a sheath with tension material inserted through the horizontal hole is inserted and placed. , FIG. 4 is a perspective view showing a state in which new concrete has been poured, and FIG. Concrete 1-,! It is an end view which shows another Example of the protrusion part of the Jj wall body. 1...Surface hole, 2...Concrete wall, 2a...Protrusion, 21 River...Horizontal hole, 3...
sheath, 4... tension material, 6... tension means, 7.
・・・Concrete, 8-

Claims (1)

[Scope of Claims] 1) A continuous wall is formed by connecting a plurality of Funkli-1 (1γ) walls in the ground in a continuous manner or in a column, and at the same time forming one concrete lit wall. At least one protrusion having a required length in the downward direction is integrally formed on the side surface, and a plurality of horizontal holes are bored in the protrusion.
．． - at least adjacent I) horizontal holes in the intervening concrete unit walls are arranged so as to be aligned with each other in a substantially horizontal direction;
A sheath is inserted into these aligned horizontal holes, and a tensioning material such as 1]0 steel is inserted into the sheath, and both ends of the tensioning material are attached to the fixing and tensioning means provided on the protrusion.
t'1, Concrete is placed on the side wall surface where the tendons are placed at -, and after the concrete has hardened, the tension is applied to the tendons using the tensioning means, and finally, grouting is carried out within the sheath at - and the concrete is continuous. A horizontal tightening method for an underground continuous wall characterized by applying horizontal tightening force to the wall. 1-2) Continuously install multiple co/cry-1 unit walls underground.
A continuous wall is formed by pouring or connecting one wall in a column, and at least one protrusion having a required length in the vertical direction is integrally formed on one side of each concrete wall. When a plurality of water holes 11L are drilled in the protrusion, horizontal holes in the concrete wall 1 and 11i that match 1 (at least adjacent pipes) are arranged so that they are aligned approximately horizontally with phase 11-. Insert a tensioning material such as PC@ material into the aligned horizontal holes, and attach both ends to the fixing and tensioning means provided on the projection, and use the tensioning means to apply tension to the tensioning material! Concrete is placed on the side wall surface where the tension material is placed in a state where the concrete is placed, and after the concrete has hardened, the tension means is released to apply horizontal tightening force to the continuous wall. Features and horizontal tightening method for 111u medium continuous wall