JPH0663223B2 - Wall and construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wall such as an underground structure and a method for constructing the same.

(Prior Art) Walls of underground structures are generally constructed of reinforced concrete from the viewpoint of strength and water stoppage. In the construction of such a wall body, conventionally, after excavating the ground, a formwork is assembled and reinforcing bars are laid out, and then concrete is placed in the formwork and hardened to dismantle the formwork. This wall is often constructed in contact with an adjacent structure to fill the site. Therefore, earth excavation is necessary for excavation, and steel sheet piles,
It is practiced to drive a sheet pile such as a horizontal sheet pile into the ground.

(Problems to be Solved by the Invention) However, in the conventional wall body, since many steps such as assembling the formwork, arranging the reinforcing bars, and placing concrete are required for the construction, the construction process is long and the construction period is long. ing.
In particular, there is a problem that the construction period cannot be shortened because the period from the placing of concrete to the hardening is long. Also,
In addition to the above steps, a temporary installation process of a sheet pile for retaining soil is also required, and the process is complicated, and when the sheet pile is installed close to the existing structure, the sheet pile is buried and useful conversion is possible. It is also impossible to do.

The present invention has been made in consideration of the above circumstances, and provides a wall body that can be constructed in a simple process in a short period of time and that can effectively utilize sheet piles, and a method for constructing the wall body. The purpose is to do.

(Means for Solving the Problem) A wall body for solving the above problem is made by placing concrete on one side of a sheet pile to form a structure in which a sheet pile and a concrete block are integrated, and Characterized by driving in the ground in a connected state, and the method of constructing the wall body, by precasting a structure in which the sheet pile and the concrete block are integrated by driving concrete into one side of the sheet pile, The structure is driven into the ground while connecting the grips of the sheet piles so that the concrete blocks are adjacent to each other, and then the ground on the side of the concrete block is excavated, and the structure is connected between the concrete blocks of the adjacent structures. It is characterized by forming a block.

(Operation) Since the structure having the sheet pile and the concrete block integrated can be manufactured in the factory in the wall body having the above-described configuration, uniform dimensions and quality can be achieved. Further, since the sheet pile is used as it is as a constituent member of the wall body, the sheet pile can be effectively utilized.

On the other hand, in the construction method of the above configuration, most of the wall body and the retaining wall can be constructed at the same time by placing the structure manufactured in the factory at the construction site. Therefore, the steps of assembling formwork, arranging reinforcing bars, placing concrete, etc. are unnecessary, and the construction period can be greatly shortened.

(Embodiment) FIG. 1 shows a structure 1 constituting a wall body of the first embodiment.
The wall body has the structure 1 as one unit, and the structure 1 is driven into the ground in a connected state for each unit, and most of the structure is constructed.

The structure 1 is constructed by integrating a concrete block 3 on one side of a sheet pile 2. The sheet pile 2 is made of steel sheet pile, and grips 2g are formed at the ends of the flanges extending on both sides of the web 2w. The grips 2g are inserted with the grips of the adjacent sheet piles engaged with each other, and the insertion serves as a joint for connecting the sheet piles to each other (see FIG. 2). In the concrete block 3, concrete is placed on one side of the sheet pile 2 and is hardened to be integrated with the sheet pile 2.

In the illustrated example, the concrete block 3 is a web 2w.
Is formed on the ventral side of the sheet pile 2 surrounded by
As will be described later, it may be formed on one surface on the opposite side to this. In order to integrate the concrete block 3 and the sheet pile 2, the gibber reinforcement 4 is appropriately provided from the side surface of the sheet pile 2.
A strip reinforcing bar 5 that extends and is engaged with the gibber reinforcing bar 4 is provided. In the figure, reference numeral 6 is a main reinforcing bar arranged in the length direction of the sheet pile 2, and reference numeral 7 is a horizontal reinforcing bar arranged in the width direction of the sheet pile 2.

In this case, the concrete block 3 is formed to have a predetermined thickness so as to project to the front rather than the sheet pile 2. However, the concrete block 3 is not formed in the grip 2g portion serving as a joint, and the sheet pile by the grip 2g is formed. Mutual connection is possible.

Such a structure 1 is driven into the ground by an appropriate means such as press fitting or striking to form a wall of the underground structure. This structure 1 is manufactured in advance in a factory, transported to a construction site, and placed in the ground. The dimensions and quality can be standardized for manufacturing in the factory, and construction work can be standardized. And workability is improved. Further, since the sheet pile that has been conventionally used only for retaining soil is used as a component of the wall body, the sheet pile can be effectively used, and the sheet pile 2 is integrated with the concrete block 3 to have a large strength. Therefore, it is possible to perform a strong earth retaining effect.

FIG. 2 shows an embodiment of a method for constructing a wall body using the structure 1 described above. The structure 1 in which the sheet pile 2 and the concrete block 3 are integrated is pressed into the ground and struck in the ground by hitting, and the grip 2g of the structure 1 that has been placed is engaged with the grip 2g of the structure 1 in the next stage. Then, the structure 1 of the next stage is similarly driven, and thereafter, this driving is continuously performed to connect the plurality of structures 1 to each other to construct most of the wall ( 2 (a)).

Next, the joint portion of the structure 1 thus connected is subjected to a water stop treatment (FIG. 2 (b)). This water stop treatment is performed by injecting a water stop agent into the ground at the grip 2g portion of the sheet pile 2 connecting the structures 1. That is, FIG.
As shown in FIG.
To prevent water from entering or exiting through the fitting. Then, after this water stopping treatment, the ground inside the structure 1 is excavated by using the structures 1 connected to each other as earth retaining walls (FIG. 2C). As a result, the portion 50 surrounded by the structure 1 becomes a dedicated space for the underground structure.

In such excavation, the sheet pile 2 serves as a retaining wall, but since the sheet pile 2 is integrated with the concrete block 3 and has high strength, a strong and reliable soil retaining action can be performed. Therefore, the distance between the fulcrums of the sheet piles 2 can be increased. In such excavation, since a void portion is formed between the concrete blocks 3 and 3 of the adjacent structures 1 and 1 (that is, the grip 2g portion of the sheet pile 2), the concrete blocks 3 and 3 are continuously provided. A block 11 is formed ((d) in the figure).

The continuous block 11 is the adjacent concrete block 3,
It can be formed by casting a caulking material between 3 and curing. By forming the continuous blocks 11, the concrete blocks 3 are continuously connected to each other to construct a wall body. This continuous block 11 is preferably formed so as to be flush with the concrete block 3 of the structure 1,
As a result, a uniform wall surface having no uneven surface is formed, and a well-ordered and well-regulated wall surface is obtained, and makeup processing can be easily performed on the wall surface. In addition to the complete waterproofing effect, the caulking material absorbs the displacement of the concrete block 3 and the structure 1 does not crack in the wall body.
The unity of is always ensured.

In this construction method, since most of the wall body is formed by driving the structure 1, it is not necessary to place concrete for constructing the wall body. For this reason, there is no need for troublesome work such as formwork assembly, reinforcing bar arrangement and concrete placement, the wall can be easily constructed, and the waiting period for hardening the concrete is unnecessary.
The construction period can be greatly shortened.

3 to 5 show another embodiment of the present invention, in which the same elements as in the above embodiment are designated by the same reference numerals. In the second embodiment shown in FIG. 3, the caulking material 12 is filled and connected between the continuous block 13 provided in the joint portion of the structure 1 and the concrete block 3 of the structure 1. That is, in this embodiment, the continuous block 13 is manufactured in advance in a factory, and after the ground is excavated (see FIG. 2 (c)), the continuous block 13 is inserted into the void portion between the concrete blocks 3. By manufacturing the continuous block 13 also in the factory in this way, the construction period can be further shortened.

In the third and fourth embodiments shown in FIGS. 4 and 5, the concrete block 3 is a structure formed on one side of the sheet pile 1 on the ventral side, and a structure formed on one side of the back side. Are alternately connected to construct a wall body, as shown in FIG.
In FIG. 5, a steel sheet pile is used as the sheet pile 2. As described above, the concrete block 3 may be formed on one surface side of the sheet pile 1 to construct a wall body, and the concrete block 3 may be on the belly side or the back side of the sheet pile 1.

(Effects of the Invention) According to the wall body of the present invention, a structure in which a sheet pile and a concrete block are integrated is used as a constituent element, and the sheet pile is used not only as a retaining wall but also as a wall body. Can be done.

Further, according to the construction method of the present invention, most of the wall bodies can be constructed by driving the connected state of the structures, and concrete pouring is unnecessary, so that the process can be simplified and the construction period can be shortened. You can

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view showing a structure of a wall body according to a first embodiment, and FIGS. 2 (a) to 2 (d).
Is a plan view showing a construction method using the structure in order of steps, FIG. 3 is a plan view of a second embodiment, and FIGS. 4 to 5 are plan views showing a third embodiment and a fourth embodiment, respectively. is there. DESCRIPTION OF SYMBOLS 1 ... Structural body, 2 ... Sheet pile, 2g ... Grip 3 ... Concrete block 11,13 ... Continuous block

Claims (2)

[Claims] 1. A wall body constructed by placing concrete on one side of a sheet pile to form a structure in which a sheet pile and a concrete block are integrated, and by placing the structure in a connected state in the ground. 2. A structure in which a sheet pile and a concrete block are integrally formed by casting concrete on one side of the sheet pile, and the grips of the sheet pile are connected to each other so that the concrete blocks are adjacent to each other. A method for constructing a wall body in which a body is placed in the ground, then the ground on the concrete block side is excavated, and a continuous block is formed between the concrete blocks of adjacent structures.